YOUR PRIVACY IS IMPORTANT TO US

Edmund Optics uses cookies to optimize and enhance the features and content on our website. Click “OK” for the full user experience, you can view additional information on the cookies we use by clicking the “Details” button. We do NOT sell your information from marketing cookies, we use it to improve ONLY YOUR experience with Edmund Optics.

Details

Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.
- Cookiebot
  1
  Learn more about this provider
  CookieConsentStores the user's cookie consent state for the current domain
  Maximum Storage Duration: 1 yearType: HTTP Cookie
- Google
  2
  Learn more about this provider
  Some of the data collected by this provider is for the purposes of personalization and measuring advertising effectiveness.
  rc::aThis cookie is used to distinguish between humans and bots. This is beneficial for the website, in order to make valid reports on the use of their website.
  Maximum Storage Duration: PersistentType: HTML Local Storage
  rc::cThis cookie is used to distinguish between humans and bots.
  Maximum Storage Duration: SessionType: HTML Local Storage
- LinkedIn
  1
  Learn more about this provider
  li_gcStores the user's cookie consent state for the current domain
  Maximum Storage Duration: 6 monthsType: HTTP Cookie
- LiveChat
  2
  Learn more about this provider
  __lc_cidNecessary for the functionality of the website's chat-box function...
  Maximum Storage Duration: 400 daysType: HTTP Cookie
  __lc_cstNecessary for the functionality of the website's chat-box function.
  Maximum Storage Duration: 400 daysType: HTTP Cookie
- edmundoptics.com.sg
  1
  QuoteIDStores the ID of your quotation cart.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
- edmundoptics.com
  eogo.edmundoptics.com
  radar.cloudflare.com
  3
  __cf_bm [x3]This cookie is used to distinguish between humans and bots. This is beneficial for the website, in order to make valid reports on the use of their website.
  Maximum Storage Duration: 1 dayType: HTTP Cookie
- eogo.edmundoptics.com
  1
  BIGipServer#Used to distribute traffic to the website on several servers in order to optimise response times.
  Maximum Storage Duration: SessionType: HTTP Cookie
- productimages.edmundoptics.com
  www.edmundoptics.in
  4
  AWSALB [x2]Registers which server-cluster is serving the visitor. This is used in context with load balancing, in order to optimize user experience.
  Maximum Storage Duration: 7 daysType: HTTP Cookie
  AWSALBCORS [x2]Registers which server-cluster is serving the visitor. This is used in context with load balancing, in order to optimize user experience.
  Maximum Storage Duration: 7 daysType: HTTP Cookie
- service.mtcaptcha.com
  3
  jsVThese cookies are used to secure the website from unwanted bots and automated scripts and help verify human users.
  Maximum Storage Duration: SessionType: HTTP Cookie
  mtv1ConfSumhttps://www.mtcaptcha.com/faq-cookie-declaration
  Maximum Storage Duration: SessionType: HTTP Cookie
  mtv1Pulsehttps://www.mtcaptcha.com/faq-cookie-declaration
  Maximum Storage Duration: SessionType: HTTP Cookie
- www.edmundoptics.in
  3
  .AspNetCore.Antiforgery.#Helps prevent Cross-Site Request Forgery (CSRF) attacks.
  Maximum Storage Duration: SessionType: HTTP Cookie
  .AspNetCore.Mvc.CookieTempDataProviderPreserves the visitor's session state across page requests.
  Maximum Storage Duration: SessionType: HTTP Cookie
  UMB_SESSIONStores domain prefix to determine whether it holds https or http URL properties.
  Maximum Storage Duration: SessionType: HTTP Cookie
Preference cookies enable a website to remember information that changes the way the website behaves or looks, like your preferred language or the region that you are in.
- LiveChat
  1
  Learn more about this provider
  __oauth_redirect_detectorAllows the website to recoqnise the visitor, in order to optimize the chat-box functionality.
  Maximum Storage Duration: 1 dayType: HTTP Cookie
- Livechat
  1
  Learn more about this provider
  @@lc_auth_token:3b0f44ba-5eb5-4bb1-a9e1-2214776a186bIdentifies the visitor across devices and visits, in order to optimize the chat-box function on the website.
  Maximum Storage Duration: PersistentType: HTML Local Storage
- edmundoptics.com.sg
  1
  chatEngagedIndicates whether the user has interacted with the website's chat-box, in order to determine whether they should be shown chat invites.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
Statistic cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.
- Convert Insight
  3
  Learn more about this provider
  _conv_rThis cookie is used as a referral-cookie that stores the visitor’s profile – the cookie is overwritten when the visitor re-enters the website and new information on the visitor is collected and stored.
  Maximum Storage Duration: SessionType: HTTP Cookie
  _conv_sThis cookie contains an ID string on the current session. This contains non-personal information on what subpages the visitor enters – this information is used to optimize the visitor's experience.
  Maximum Storage Duration: 1 dayType: HTTP Cookie
  _conv_vThis cookie is used to identify the frequency of visits and how long the visitor is on the website. The cookie is also used to determine how many and which subpages the visitor visits on a website – this information can be used by the website to optimize the domain and its subpages.
  Maximum Storage Duration: 6 monthsType: HTTP Cookie
- Google
  2
  Learn more about this provider
  Some of the data collected by this provider is for the purposes of personalization and measuring advertising effectiveness.
  _gaRegisters a unique ID that is used to generate statistical data on how the visitor uses the website.
  Maximum Storage Duration: 25 monthsType: HTTP Cookie
  _ga_#Used by Google Analytics to collect data on the number of times a user has visited the website as well as dates for the first and most recent visit.
  Maximum Storage Duration: 25 monthsType: HTTP Cookie
- Livechat
  1
  Learn more about this provider
  _livechat_has_visitedIdentifies the visitor across devices and visits, in order to optimize the chat-box function on the website.
  Maximum Storage Duration: PersistentType: HTML Local Storage
- edmundoptics.com
  1
  ce_diff_timeUsed by Crazy Egg to offset time for analytics purposes.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
- edmundoptics.com.sg
  2
  ce_ip_addressUsed by Crazy Egg to store the user's IP address.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  events/1/#Used by New Relic to monitor the performance of the page and page elements during user interaction.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
Marketing cookies are used to track visitors across websites. The intention is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers.
- Meta Platforms, Inc.
  3
  Learn more about this provider
  lastExternalReferrerDetects how the user reached the website by registering their last URL-address.
  Maximum Storage Duration: PersistentType: HTML Local Storage
  lastExternalReferrerTimeDetects how the user reached the website by registering their last URL-address.
  Maximum Storage Duration: PersistentType: HTML Local Storage
  _fbpUsed by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.
  Maximum Storage Duration: 3 monthsType: HTTP Cookie
- Convert Insight
  2
  Learn more about this provider
  conv_randThis cookie is used by the website’s operator in context with multi-variate testing. This is a tool used to combine or change content on the website. This allows the website to find the best variation/edition of the site.
  Maximum Storage Duration: PersistentType: HTML Local Storage
  _conv_sptestThis cookie is used by the website’s operator in context with multi-variate testing. This is a tool used to combine or change content on the website. This allows the website to find the best variation/edition of the site.
  Maximum Storage Duration: SessionType: HTTP Cookie
- Google
  5
  Learn more about this provider
  Some of the data collected by this provider is for the purposes of personalization and measuring advertising effectiveness.
  IDEUsed by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
  Maximum Storage Duration: 400 daysType: HTTP Cookie
  test_cookieUsed to check if the user's browser supports cookies.
  Maximum Storage Duration: 1 dayType: HTTP Cookie
  _gcl_auUsed by Google AdSense for experimenting with advertisement efficiency across websites using their services.
  Maximum Storage Duration: 3 monthsType: HTTP Cookie
  NIDRegisters a unique ID that identifies a returning user's device. The ID is used for targeted ads.
  Maximum Storage Duration: 6 monthsType: HTTP Cookie
  pagead/1p-user-list/#Tracks if the user has shown interest in specific products or events across multiple websites and detects how the user navigates between sites. This is used for measurement of advertisement efforts and facilitates payment of referral-fees between websites.
  Maximum Storage Duration: SessionType: Pixel Tracker
- LinkedIn
  2
  Learn more about this provider
  bcookieUsed by the social networking service, LinkedIn, for tracking the use of embedded services.
  Maximum Storage Duration: 1 yearType: HTTP Cookie
  lidcUsed by the social networking service, LinkedIn, for tracking the use of embedded services.
  Maximum Storage Duration: 2 daysType: HTTP Cookie
- Usercentrics GmbH
  1
  Learn more about this provider
  1.gifUsed to count the number of sessions to the website, necessary for optimizing CMP product delivery.
  Maximum Storage Duration: SessionType: Pixel Tracker
- Wisepops
  16
  Learn more about this provider
  __tld__Used to track visitors on multiple websites, in order to present relevant advertisement based on the visitor's preferences.
  Maximum Storage Duration: SessionType: HTTP Cookie
  wisepops [x2]Used in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTTP Cookie
  wisepops_props [x2]Used in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTTP Cookie
  wisepops_session [x2]Used in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTTP Cookie
  wisepops_visitor [x2]Used in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTTP Cookie
  wisepops_visits [x2]Used in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTTP Cookie
  wisepops_session_idUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTML Local Storage
  wisepops_session_landing_urlUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTML Local Storage
  wisepops_session_referrerUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTML Local Storage
  wisepops-pageview_idUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTML Local Storage
  wisepops-uses-attentionUsed in context with pop-up advertisement-content on the website. The cookie determines which ads the visitor should be shown, as well as ensuring that the same ads does not get shown more than intended.
  Maximum Storage Duration: SessionType: HTML Local Storage
- YouTube
  22
  Learn more about this provider
  #-#Used to track user’s interaction with embedded content.
  Maximum Storage Duration: SessionType: HTML Local Storage
  __Secure-ROLLOUT_TOKENPending
  Maximum Storage Duration: 180 daysType: HTTP Cookie
  iU5q-!O9@$Registers a unique ID to keep statistics of what videos from YouTube the user has seen.
  Maximum Storage Duration: SessionType: HTML Local Storage
  LAST_RESULT_ENTRY_KEYUsed to track user’s interaction with embedded content.
  Maximum Storage Duration: SessionType: HTTP Cookie
  LogsDatabaseV2:V#||LogsRequestsStoreStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: PersistentType: IndexedDB
  nextIdUsed to track user’s interaction with embedded content.
  Maximum Storage Duration: SessionType: HTTP Cookie
  remote_sidNecessary for the implementation and functionality of YouTube video-content on the website.
  Maximum Storage Duration: SessionType: HTTP Cookie
  requestsUsed to track user’s interaction with embedded content.
  Maximum Storage Duration: SessionType: HTTP Cookie
  ServiceWorkerLogsDatabase#SWHealthLogNecessary for the implementation and functionality of YouTube video-content on the website.
  Maximum Storage Duration: PersistentType: IndexedDB
  TESTCOOKIESENABLEDUsed to track user’s interaction with embedded content.
  Maximum Storage Duration: 1 dayType: HTTP Cookie
  VISITOR_INFO1_LIVETries to estimate the users' bandwidth on pages with integrated YouTube videos.
  Maximum Storage Duration: 180 daysType: HTTP Cookie
  YSCRegisters a unique ID to keep statistics of what videos from YouTube the user has seen.
  Maximum Storage Duration: SessionType: HTTP Cookie
  yt.innertube::nextIdRegisters a unique ID to keep statistics of what videos from YouTube the user has seen.
  Maximum Storage Duration: PersistentType: HTML Local Storage
  ytidb::LAST_RESULT_ENTRY_KEYStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: PersistentType: HTML Local Storage
  YtIdbMeta#databasesUsed to track user’s interaction with embedded content.
  Maximum Storage Duration: PersistentType: IndexedDB
  yt-remote-cast-availableStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: SessionType: HTML Local Storage
  yt-remote-cast-installedStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: SessionType: HTML Local Storage
  yt-remote-connected-devicesStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: PersistentType: HTML Local Storage
  yt-remote-device-idStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: PersistentType: HTML Local Storage
  yt-remote-fast-check-periodStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: SessionType: HTML Local Storage
  yt-remote-session-appStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: SessionType: HTML Local Storage
  yt-remote-session-nameStores the user's video player preferences using embedded YouTube video
  Maximum Storage Duration: SessionType: HTML Local Storage
- edmundoptics.com.sg
  9
  _gaexpThis cookie is used by Google Analytics to determine if the visitor is involved in their marketing experiments.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  ads/ga-audiencesUsed by Google AdWords to re-engage visitors that are likely to convert to customers based on the visitor's online behaviour across websites.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  gwccEnables Google Website Call Conversions - This registers if the visitor has clicked on call within the "contact us" sub-page. This information is used for statistics and marketing purposes.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  mTracking pixel used by South Korean Company, Naver Analytics to track website engagement
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  NWBUsed by South Korean Company, Naver Analytics for web analytics that tracks and reports website traffic
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  NWB_LegacyUsed by South Korean Company, Naver Analytics for web analytics that tracks and reports website traffic
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  pagead/1p-user-list/#Tracking pixel used by Google analytics to track website engagement
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  trUsed by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
  wcs_btUsed by South Korean Company, Naver Analytics for cross site web analytics
  Maximum Storage Duration: 14 daysType: HTTP Cookie
- edmundoptics.com.sg
  munchkin.marketo.net
  2
  _mkto_trk [x2]Contains data on visitor behaviour and website interaction. This is used in context with the email marketing service Marketo.com, which allows the website to target visitors via email.
  Maximum Storage Duration: 14 daysType: HTTP Cookie
Unclassified cookies are cookies that we are in the process of classifying, together with the providers of individual cookies.
- Google
  1
  Learn more about this provider
  Some of the data collected by this provider is for the purposes of personalization and measuring advertising effectiveness.
  _gcl_lsPending
  Maximum Storage Duration: PersistentType: HTML Local Storage
- Livechat
  1
  Learn more about this provider
  3b0f44ba-5eb5-4bb1-a9e1-2214776a186b:statePending
  Maximum Storage Duration: PersistentType: HTML Local Storage

Cookie declaration last updated on 3/15/25 by Cookiebot

[#IABV2_TITLE#]

[#IABV2_BODY_INTRO#]

[#IABV2_BODY_LEGITIMATE_INTEREST_INTRO#]

[#IABV2_BODY_PREFERENCE_INTRO#]

[#IABV2_BODY_PURPOSES_INTRO#]

[#IABV2_BODY_PURPOSES#]

[#IABV2_BODY_FEATURES_INTRO#]

[#IABV2_BODY_FEATURES#]

[#IABV2_BODY_PARTNERS_INTRO#]

[#IABV2_BODY_PARTNERS#]

Cookies are small text files that can be used by websites to make a user's experience more efficient.

The law states that we can store cookies on your device if they are strictly necessary for the operation of this site. For all other types of cookies we need your permission.

This site uses different types of cookies. Some cookies are placed by third party services that appear on our pages.

You can at any time change or withdraw your consent from the Cookie Declaration on our website.

Learn more about who we are, how you can contact us and how we process personal data in our Privacy Policy.

Please state your consent ID and date when you contact us regarding your consent.

Most web browsers allow you to view your cookies in the browser preferences, typically within the "Privacy" or "Security" tab. Some browsers allow you to delete specific cookies or even prevent cookies from being created. While disallowing cookies in your browser may provide a higher level of privacy, it is not recommended since many websites require cookies to function properly. Alternatively, you can visit www.aboutcookies.org which provides directions on how to block or delete cookies on all major browsers.

Do not sell or share my personal information

Family ID The Family ID is used to identify product family presentations and can be used to quickly access presentations utilizing the search. #3754

TECHSPEC^® components are designed, specified, or manufactured by Edmund Optics. Learn More

λ/20 First Surface Mirrors

Precision Fused Silica Substrate
20-10 Surface Quality
Low Coefficient of Thermal Expansion

TECHSPEC® λ/20 First Surface Mirrors are polished to industry leading surface accuracy and quality specifications to minimize reflected wavefront error. These mirrors feature a precision fused silica substrate with a low coefficient of thermal expansion. Multiple coating options are available, allowing these mirrors to be integrated into applications spanning the visible through infrared spectra. TECHSPEC® λ/20 First Surface Mirrors are ideal for beam steering and reflection applications and are available in a variety of size, thickness, and coating options.

Note: Surface flatness is measured before coating.

Common Specifications

Back Surface:

Commercial Polish

Clear Aperture (%):

90.00

Edges:

Ground, protective bevel as needed

Parallelism (arcsec):

30.00

Substrate:

Fused Silica (Corning 7980)

Surface Quality:

20-10

Coating Type:

Metal

Products
Technical Information
Accessories
Related Products
Resources

Products

Dia. (mm)	Surface Flatness (P-V)	Dimensions (mm)	Coating Specification	Coating	Thickness (mm)	Stock Number	Price	Buy

10.00 10.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	2.00 2.00	#34-354	10,353 ₹10,353 Qty 6+ ₹8,222 Request Quote	10 to 12 days ×
10.00 10.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	2.00 2.00	#34-370	12,789 ₹12,789 Qty 6+ ₹10,266 Request Quote	Contact Us ×
10.00 10.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	2.00 2.00	#34-386	12,354 ₹12,354 Qty 6+ ₹9,875 Request Quote	10 to 12 days ×
10.00 10.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	2.00 2.00	#70-285 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	10,353 ₹10,353 Qty 6+ ₹8,287 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	10.0 x 10.0 10.0 x 10.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	2.00 2.00	#34-355	10,353 ₹10,353 Qty 6+ ₹8,222 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	10.0 x 10.0 10.0 x 10.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	2.00 2.00	#34-371	12,789 ₹12,789 Qty 6+ ₹10,266 Request Quote	Contact Us ×
- -	λ/20 λ/20	10.0 x 10.0 10.0 x 10.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	2.00 2.00	#34-387	12,354 ₹12,354 Qty 6+ ₹9,875 Request Quote	Contact Us ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	10.00 x 10.00 10.00 x 10.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	2.00 2.00	#70-286 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	10,353 ₹10,353 Qty 6+ ₹8,287 Request Quote	10 to 12 days ×
15.00 15.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	3.00 3.00	#34-356	10,962 ₹10,962 Qty 6+ ₹8,787 Request Quote	10 to 12 days ×
15.00 15.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	3.00 3.00	#34-372	14,007 ₹14,007 Qty 6+ ₹11,180 Request Quote	10 to 12 days ×
15.00 15.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	3.00 3.00	#34-388	12,789 ₹12,789 Qty 6+ ₹10,266 Request Quote	10 to 12 days ×
15.00 15.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	3.00 3.00	#70-287 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	10,962 ₹10,962 Qty 6+ ₹8,765 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	15.0 x 15.0 15.0 x 15.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	3.00 3.00	#34-357	10,962 ₹10,962 Qty 6+ ₹8,787 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	15.0 x 15.0 15.0 x 15.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	3.00 3.00	#34-373	14,007 ₹14,007 Qty 6+ ₹11,180 Request Quote	Contact Us ×
- -	λ/20 λ/20	15.0 x 15.0 15.0 x 15.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	3.00 3.00	#34-389	12,789 ₹12,789 Qty 6+ ₹10,266 Request Quote	Contact Us ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	15.00 x 15.00 15.00 x 15.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	3.00 3.00	#70-288 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	10,962 ₹10,962 Qty 6+ ₹8,765 Request Quote	10 to 12 days ×
20.00 20.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	3.00 3.00	#34-358	11,919 ₹11,919 Qty 6+ ₹9,527 Request Quote	10 to 12 days ×
20.00 20.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	3.00 3.00	#34-374	14,616 ₹14,616 Qty 6+ ₹11,702 Request Quote	10 to 12 days ×
20.00 20.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	3.00 3.00	#34-390	14,181 ₹14,181 Qty 6+ ₹11,354 Request Quote	Contact Us ×
20.00 20.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	3.00 3.00	#70-289 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	11,919 ₹11,919 Qty 6+ ₹9,527 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	20.0 x 20.0 20.0 x 20.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	3.00 3.00	#34-359	11,919 ₹11,919 Qty 6+ ₹9,527 Request Quote	Contact Us ×
- -	λ/20 λ/20	20.0 x 20.0 20.0 x 20.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	3.00 3.00	#34-375	14,616 ₹14,616 Qty 6+ ₹11,702 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	20.0 x 20.0 20.0 x 20.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	3.00 3.00	#34-391	14,181 ₹14,181 Qty 6+ ₹11,354 Request Quote	10 to 12 days ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	20.00 x 20.00 20.00 x 20.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	3.00 3.00	#70-290 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	11,919 ₹11,919 Qty 6+ ₹9,527 Request Quote	Contact Us ×
25.00 25.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	4.00 4.00	#34-360	12,354 ₹12,354 Qty 6+ ₹9,875 Request Quote	10 to 12 days ×
25.00 25.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	4.00 4.00	#34-376	18,270 ₹18,270 Qty 6+ ₹14,616 Request Quote	Contact Us ×
25.00 25.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	4.00 4.00	#34-392	15,834 ₹15,834 Qty 6+ ₹12,615 Request Quote	10 to 12 days ×
25.00 25.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	4.00 4.00	#70-291 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	12,354 ₹12,354 Qty 6+ ₹9,875 Request Quote	Contact Us ×
- -	λ/20 λ/20	25.0 x 25.0 25.0 x 25.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	4.00 4.00	#34-361	12,354 ₹12,354 Qty 6+ ₹9,875 Request Quote	Contact Us ×
- -	λ/20 λ/20	25.0 x 25.0 25.0 x 25.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	4.00 4.00	#34-377	18,270 ₹18,270 Qty 6+ ₹14,616 Request Quote	Contact Us ×
- -	λ/20 λ/20	25.0 x 25.0 25.0 x 25.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	4.00 4.00	#34-393	15,834 ₹15,834 Qty 6+ ₹12,615 Request Quote	10 to 12 days ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	25.00 x 25.00 25.00 x 25.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	4.00 4.00	#70-292 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	12,354 ₹12,354 Qty 6+ ₹9,875 Request Quote	10 to 12 days ×
30.00 30.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	5.00 5.00	#34-362	16,269 ₹16,269 Qty 6+ ₹13,007 Request Quote	10 to 12 days ×
30.00 30.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	5.00 5.00	#34-378	21,750 ₹21,750 Qty 6+ ₹17,357 Request Quote	10 to 12 days ×
30.00 30.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	5.00 5.00	#34-394	18,096 ₹18,096 Qty 6+ ₹14,442 Request Quote	10 to 12 days ×
30.00 30.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	5.00 5.00	#70-293 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	16,269 ₹16,269 Qty 6+ ₹13,007 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	30.0 x 30.0 30.0 x 30.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	5.00 5.00	#34-363	16,269 ₹16,269 Qty 6+ ₹13,007 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	30.0 x 30.0 30.0 x 30.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	5.00 5.00	#34-379	21,750 ₹21,750 Qty 6+ ₹17,357 Request Quote	Contact Us ×
- -	λ/20 λ/20	30.0 x 30.0 30.0 x 30.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	5.00 5.00	#34-395	18,096 ₹18,096 Qty 6+ ₹14,442 Request Quote	10 to 12 days ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	30.00 x 30.00 30.00 x 30.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	5.00 5.00	#70-294 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	16,269 ₹16,269 Qty 6+ ₹13,007 Request Quote	10 to 12 days ×
40.00 40.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	5.00 5.00	#34-364	19,488 ₹19,488 Qty 6+ ₹15,530 Request Quote	Contact Us ×
40.00 40.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	5.00 5.00	#34-380	25,839 ₹25,839 Qty 6+ ₹20,663 Request Quote	10 to 12 days ×
40.00 40.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	5.00 5.00	#34-396	23,751 ₹23,751 Qty 6+ ₹19,010 Request Quote	Contact Us ×
40.00 40.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	5.00 5.00	#70-295 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	19,488 ₹19,488 Qty 6+ ₹15,595 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	40.0 x 40.0 40.0 x 40.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	5.00 5.00	#34-365	19,488 ₹19,488 Qty 6+ ₹15,530 Request Quote	Contact Us ×
- -	λ/20 λ/20	40.0 x 40.0 40.0 x 40.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	5.00 5.00	#34-381	25,839 ₹25,839 Qty 6+ ₹20,663 Request Quote	Contact Us ×
- -	λ/20 λ/20	40.0 x 40.0 40.0 x 40.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	5.00 5.00	#34-397	23,751 ₹23,751 Qty 6+ ₹19,010 Request Quote	10 to 12 days ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	40.00 x 40.00 40.00 x 40.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	5.00 5.00	#70-296 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	19,488 ₹19,488 Qty 6+ ₹15,595 Request Quote	10 to 12 days ×
50.00 50.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	5.00 5.00	#34-366	20,793 ₹20,793 Qty 6+ ₹16,661 Request Quote	10 to 12 days ×
50.00 50.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	5.00 5.00	#34-382	29,058 ₹29,058 Qty 6+ ₹23,229 Request Quote	10 to 12 days ×
50.00 50.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	5.00 5.00	#34-398	26,535 ₹26,535 Qty 6+ ₹21,228 Request Quote	Contact Us ×
50.00 50.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	5.00 5.00	#70-297 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	20,793 ₹20,793 Qty 6+ ₹16,639 Request Quote	Contact Us ×
- -	λ/20 λ/20	50.0 x 50.0 50.0 x 50.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	5.00 5.00	#34-367	20,793 ₹20,793 Qty 6+ ₹16,661 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	50.0 x 50.0 50.0 x 50.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	5.00 5.00	#34-383	29,058 ₹29,058 Qty 6+ ₹23,229 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	50.0 x 50.0 50.0 x 50.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	5.00 5.00	#34-399	26,535 ₹26,535 Qty 6+ ₹21,228 Request Quote	10 to 12 days ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	50.00 x 50.00 50.00 x 50.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	5.00 5.00	#70-299 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	20,793 ₹20,793 Qty 6+ ₹16,639 Request Quote	10 to 12 days ×
75.00 75.00	λ/20 λ/20	- -	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	7.50 7.50	#34-368	43,413 ₹43,413 Qty 6+ ₹34,713 Request Quote	Contact Us ×
75.00 75.00	λ/20 λ/20	- -	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	7.50 7.50	#34-384	56,202 ₹56,202 Qty 6+ ₹44,979 Request Quote	10 to 12 days ×
75.00 75.00	λ/20 λ/20	- -	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	7.50 7.50	#34-400	52,113 ₹52,113 Qty 6+ ₹41,673 Request Quote	10 to 12 days ×
75.00 75.00	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	- -	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	7.50 7.50	#70-300 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	43,413 ₹43,413 Qty 6+ ₹34,735 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	75.0 x 75.0 75.0 x 75.0	Ravg >95% @ 450 - 650nm R_avg >95% @ 450 - 650nm	Enhanced Aluminum (450-650nm) Enhanced Aluminum (450-650nm)	7.50 7.50	#34-369	43,413 ₹43,413 Qty 6+ ₹34,713 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	75.0 x 75.0 75.0 x 75.0	R_avg >96% @ 700 - 2000nm R_avg >96% @ 2000 - 10,000nm	Protected Gold (700-10000nm) Protected Gold (700-10000nm)	7.50 7.50	#34-385	56,202 ₹56,202 Qty 6+ ₹44,979 Request Quote	10 to 12 days ×
- -	λ/20 λ/20	75.0 x 75.0 75.0 x 75.0	R_avg >98% @ 450 - 2000nm R_avg >98% @ 2000 - 10,000nm	Protected Silver (450-10000nm) Protected Silver (450-10000nm)	7.50 7.50	#34-401	52,113 ₹52,113 Qty 6+ ₹41,673 Request Quote	Contact Us ×
- -	λ/20 (flatness pre-coating) λ/20 (flatness pre-coating)	75.00 x 75.00 75.00 x 75.00	R_avg >85% @ 250 - 700nm R_avg >89% @ 250 - 450nm	UV Enhanced Aluminum (250-700nm) UV Enhanced Aluminum (250-700nm)	7.50 7.50	#70-301 New New Launched on our website before appearing in our latest print catalogs. Be the first to buy before anyone else!	43,413 ₹43,413 Qty 6+ ₹34,735 Request Quote	10 to 12 days ×

Technical Information

Accessories

Related Products

Interferometry Windows

Precision Optical Flat Mirrors

Laser Line λ/20 High Tolerance Right Angle Mirrors

λ/10 First Surface Mirrors

Resources

Filter

Metallic Mirror Coatings

Want to learn more about metallic mirror coatings? Find information about standard and custom metallic mirror coatings that are available at Edmund Optics.

View Now

Optical Mirrors Review

Mirrors are commonly used to fold or compact an optical system.

View Now

What is the difference between a first-surface and a second-surface mirror?

View Now

You specified a first surface mirror but you seem to have sold me a second surface mirror. What happened?

View Now

What is a seamed edge?

View Now

What is the difference between ¼ wave, 1/10 wave, and 1/20 wave mirrors?

View Now

Does the polarization of light change after reflecting off a mirror?

View Now

How do I clean my mirrors?

View Now

How do I mount a mirror to a mirror mount that doesn't have a clamp or retainer ring?

View Now

Angle of Incidence

View Now

Angle of Reflection

View Now

Cold Mirror

View Now

Eccentricity

View Now

Retroreflector

View Now

What is the difference between Protected Aluminum, Enhanced Aluminum, UV Enhanced Aluminum, Protected Gold, and Protected Silver?

View Now

How do you measure the reflectivity of mirrors with a reflectivity less than 99.5%?

View Now

Do you have mounts for square or rectangular optics?

View Now

First Surface Mirror

View Now

Reflection

View Now

Specular

View Now

Parity

View Now

Basic Principles of Raman Scattering and Spectroscopy

Raman spectroscopy is a technique used to identify the chemical composition of samples based on how light scatters off of them. Learn more & view related optics

View Now

Removing Protective Plastic Coating

A protective plastic coating protects a variety of our flat optics, such as optical windows, optical mirrors, and beamsplitters, from scratches during shipping.

View Now

Bevel

View Now

Parallelism

View Now

Seamed Edge

View Now

Surface Flatness

View Now

How do I clean my optics?

View Now

Clear Aperture (CA)

View Now

Edmund Optics Global Manufacturing Facilities

Edmund Optics® (EO) manufactures millions of precision optical components and subassemblies every year in our 5 global manufacturing facilities.

View Now

Metrology at Edmund Optics: Measuring as a Key Component of Manufacturing

Learn about the metrology that Edmund Optics® uses to guarantee the quality of all optical components and assemblies.

View Now

Surface Quality

View Now

λ/20 First Surface Mirrors

Can't find what you need?

Common Specifications

Products

Technical Information

Accessories

Related Products

Resources

Metallic Mirror Coatings

Optical Mirrors Review

What is the difference between a first-surface and a second-surface mirror?

You specified a first surface mirror but you seem to have sold me a second surface mirror. What happened?

What is a seamed edge?

What is the difference between &frac14; wave, 1/10 wave, and 1/20 wave mirrors?

Does the polarization of light change after reflecting off a mirror?

How do I clean my mirrors?

How do I mount a mirror to a mirror mount that doesn't have a clamp or retainer ring?

Angle of Incidence

Angle of Reflection

Cold Mirror

Eccentricity

Retroreflector

What is the difference between Protected Aluminum, Enhanced Aluminum, UV Enhanced Aluminum, Protected Gold, and Protected Silver?

How do you measure the reflectivity of mirrors with a reflectivity less than 99.5%?

Do you have mounts for square or rectangular optics?

First Surface Mirror

Reflection

Specular

Parity

Basic Principles of Raman Scattering and Spectroscopy

Removing Protective Plastic Coating

Bevel

Parallelism

Seamed Edge

Surface Flatness

How do I clean my optics?

Clear Aperture (CA)

Edmund Optics Global Manufacturing Facilities

Metrology at Edmund Optics: Measuring as a Key Component of Manufacturing

Surface Quality

What is the difference between ¼ wave, 1/10 wave, and 1/20 wave mirrors?