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See all 7 Products in Family

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

25mm Dia. x -100mm FL, VIS-EXT Coated, Double-Concave Lens

Name: 25mm Dia. x -100mm FL, VIS-EXT Coated, Double-Concave Lens
Brand: TECHSPEC
SKU: 26-674
Price: ₹4,009

Stock #26-674 10 to 12 days

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₹4,009

Qty 1-9
₹4,009

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₹3,601

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STEP:step

Curve:pdf

PDF Drawing:pdf

ISO 10110 Drawing

IGES:igs

Curve (xslx):xlsx

Zemax:zmx

eDrawing:eprt

EO Spec Sheet

Specifications
Product Details
Technical Information
Accessories
Related Products
Custom
Imaging Lens Selector
Frequently Purchased Together
Resources

Specifications

General

Type:

Double-Concave Lens

Physical & Mechanical Properties

Diameter (mm):

25.00 +0.0/-0.025

Bevel:

Protective bevel as needed

Center Thickness CT (mm):

5.00 ±0.10

Centering (arcmin):

Clear Aperture CA (mm):

24.00

Edge Thickness ET (mm):

6.43

Optical Properties

Effective Focal Length EFL (mm):

-100.00

N-BK7

f/#:

4.00

Numerical Aperture NA:

0.13

Coating:

VIS-EXT (350-700nm)

Wavelength Range (nm):

350 - 700

Back Focal Length BFL (mm):

-101.64

Coating Specification:

R_avg ≤0.4% @ 425 - 675nm

Focal Length Specification Wavelength (nm):

587.6

Focal Length Tolerance (%):

±1

Radius R₁=-R₂ (mm):

-104.20

Surface Quality:

40-20

5 J/cm² @ 532nm, 10ns

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Regulatory Compliance

RoHS 2015:

Compliant

Certificate of Conformance:

View

Reach 235:

Compliant

Product Details

AR Coated to Provide <0.5% Reflectance per Surface for 350 - 700nm
Designed for 0° Angle of Incidence
Precision Diameter and Centration Tolerances Allow for Easy OEM Integration
Additional AR Coating Options Available: Uncoated, MgF₂, VIS 0°, VIS-NIR, NIR I, and NIR II

TECHSPEC® VIS-EXT Coated Double-Concave (DCV) Lenses are designed to have two inward curved surfaces and a negative focal length similar to Plano-Concave (PCV) lenses. These lenses can be used for balancing aberrations created by other lenses within a system due to their negative spherical aberration. Plano-Concave (DCV) lenses are commonly used in a variety of applications including image reduction, beam expansion and telescopes. TECHSPEC® VIS-EXT Coated Plano-Concave (DCV) Lenses offer optimal performance in the 350nm to 700nm range. These lenses are also available Uncoated, MgF₂, VIS 0°, VIS-NIR, NIR I, or with NIR II AR coating options.

Technical Information

Accessories

Custom

Edmund Optics offers comprehensive custom manufacturing services for optical and imaging components tailored to your specific application requirements. Whether in the prototyping phase or preparing for full-scale production, we provide flexible solutions to meet your needs. Our experienced engineers are here to assist—from concept to completion.

Our capabilities include:

Custom dimensions, materials, coatings, and more
High-precision surface quality and flatness
Tight tolerances and complex geometries
Scalable production—from prototype to volume

Learn more about our custom manufacturing capabilities or submit an inquiry here.

Imaging Lens Selector

Frequently Purchased Together

Resources

Filter

Anti-Reflection (AR) Coatings

Anti-reflection (AR) coatings are applied to optical components to increase throughput and reduce hazards caused by back-reflections.

View Now

An Introduction to Optical Coatings

Optical coatings are used to influence the transmission, reflection, or polarization properties of an optical component.

View Now

Lens Geometry Performance Comparison

This comparison of the performance of aspheric, achromatic, and spherical PCX lenses in different situations reveals the ideal use cases for each type of lens.

View Now

Understanding Optical Specifications

Do you want to know more about the importance of optical specifications? Learn the different types of specifications and their impact on your system at Edmund Optics.

View Now

SAG Calculator

View Now

Future of Spherical Lenses

Traditional spherical lenses are evolving due to the increasing demands of applications. Learn about the future of spherical lenses at Edmund Optics.

View Now

Edge-Blackening

Have a question about Edge-Blackening? Find more information on stray light, measuring BRDF, and more at Edmund Optics.

View Now

Geometrical Optics 101: Paraxial Ray Tracing Calculations

Do you use ray tracing on a regular basis? Learn more about the calculations aspect, along with steps and software at Edmund Optics.

View Now

Optics Application Examples

Looking for application examples? Find examples for Detector Systems, Selecting the Right Lens, and Building a Projection System at Edmund Optics.

View Now

Understanding Optical Lens Geometries

Optical lens geometries control light in different ways. Learn about Snell's Law of Refraction, lens terminology and geometries at Edmund Optics.

View Now

Precision Tolerances for Spherical Lenses

Optical lenses require very precise tolerances. Learn more about tolerances for spherical lenses at Edmund Optics.

View Now

Keys to Cost Effective Optical Design and Tolerancing

Are you looking for ways to make cost effective optical designs? Find more information on selecting specifications and using tolerancing schemes at Edmund Optics.

View Now

How do I clean my lenses?

View Now

Is it possible to find Plano-Concave (PCV) or Double Concave (DCV) lenses where the diameter is greater than the focal length?

View Now

How does reversing the orientation of a PCX lens affect the EFL and BFL in a setup?

View Now

Double-Concave (DCV) Lens

View Now

Double-Convex (DCX) Lens

View Now

Meniscus Lens

View Now

Plano-Concave (PCV) Lens

View Now

Plano-Convex (PCX) Lens

View Now

Advantages of Using Meniscus Lenses in Infrared Applications

Meniscus lenses offer superior performance compared to plano convex lenses in IR applications. Find out the benefits of using a meniscus lens at Edmund Optics.

View Now

How to Design your own Beam Expander Using Stock Optics

Are standard beam expanders not meeting your application requirements? Learn how to design your own beam expander using stock optics at Edmund Optics.

View Now

Modifying Stock Optics Tip #3: Turn A Sphere Into An Asphere

Join Andrew Fisher, Manufacturing R&D Engineer at Edmund Optics, as he discusses some tips for modifying stock optical components to fit your application's needs.

View Now

What is the difference between the effective focal length and the back focal length?

View Now

What are the benefits of aspheric lenses compared to standard singlet lenses?

View Now

I am looking to prototype an illumination system. My objective is to use a small halogen filament bulb and end up with a beam of light. What would be the best lens or lens combination to give me this projected spot of light?

View Now

Back Focal Length (BFL)

View Now

Field Curvature

View Now

Sag

View Now

Rapid Optical Prototyping

Quickly Respond to Collapsing Product Lifecycles

View Now

Optical Glass

Choosing the right optical glass is important. Find out factors and properties on how to select the right optical glass at Edmund Optics.

View Now

Aberrations

Need help understanding aberration theory? Learn about a few fundamental concepts to help clarify your understanding at Edmund Optics.

View Now

The Airy Disk and Diffraction Limit

The diffraction pattern caused when light passes through an aperture is called the Airy Disk. Find out how the Airy Disk can impact your image at Edmund Optics.

View Now

What is the difference between an inked lens and a non-inked one?

View Now

If I want to design with your lenses and lens assemblies, how do I get the information that I need?

View Now

Now that I have chosen my lens, how do I mount it?

View Now

Center Thickness (CT)

View Now

Chromatic Focal Shift

View Now

Conjugate Distance

View Now

Épaisseur de bord

View Now

Distance focale effective (EFL)

View Now

Finite/Finite Conjugate

View Now

Power

View Now

Singlet Lens

View Now

How to Determine Magnification of an Optical Lens Setup

When doing basic imaging, how do you determine the magnification an optical lens will provide?

View Now

Understanding Collimation to Determine Optical Lens Focal Length

Collimated light occurs when light rays travel parallel to each other.

View Now

How to Form an Image with an Optical Lens Setup

Although a common misconception, individual optical lenses do not always form an image when the object plane is placed a focal length away from the lens.

View Now

Modifying Stock Optics Tip #4: Add A Coating To A Stock Lens

Join Andrew Fisher, Manufacturing R&D Engineer at Edmund Optics, as he discusses some tips for modifying stock optical components to fit your application's needs.

View Now

Irregularity

View Now

Radius of Curvature

View Now

BBAR Coating

View Now

Diopter

View Now

Understanding Surface Quality Specifications

The surface quality of optical components the scattering off of its surface, which is especially important in laser optics applications.

View Now

Anti-Reflection (AR) Coating

View Now

Bevel

View Now

Seamed Edge

View Now

Introduction to Basic Ray Optics

An understanding of refraction and basic ray optics is a critical foundation for understanding more complicated optical concepts and technologies.

View Now

Surface Flatness

View Now

Transmission

View Now

How do I clean my optics?

View Now

Clear Aperture (CA)

View Now

Refraction

View Now

Integration of Optical Systems

Are you looking to use integration in your next system? Find out more about integrating in both imaging and non-imaging applications at Edmund Optics.

View Now

Stock and Custom Optics Manufacturing Capabilities

Edmund Optics is a global stock and custom optics manufacturing company with in house optical designers and on-site metrology and environmental testing.

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

25mm Dia. x -100mm FL, VIS-EXT Coated, Double-Concave Lens

Specifications

General

Physical & Mechanical Properties

Optical Properties

Regulatory Compliance

Product Details

Technical Information

Accessories

Related Products

Custom

Imaging Lens Selector

Frequently Purchased Together

Resources

Anti-Reflection (AR) Coatings

An Introduction to Optical Coatings

Lens Geometry Performance Comparison

Understanding Optical Specifications

SAG Calculator

Future of Spherical Lenses

Edge-Blackening

Geometrical Optics 101: Paraxial Ray Tracing Calculations

Optics Application Examples

Understanding Optical Lens Geometries

Precision Tolerances for Spherical Lenses

Keys to Cost Effective Optical Design and Tolerancing

How do I clean my lenses?

Is it possible to find Plano-Concave (PCV) or Double Concave (DCV) lenses where the diameter is greater than the focal length?

How does reversing the orientation of a PCX lens affect the EFL and BFL in a setup?

Double-Concave (DCV) Lens

Double-Convex (DCX) Lens

Meniscus Lens

Plano-Concave (PCV) Lens

Plano-Convex (PCX) Lens

Advantages of Using Meniscus Lenses in Infrared Applications

How to Design your own Beam Expander Using Stock Optics

Modifying Stock Optics Tip #3: Turn A Sphere Into An Asphere

What is the difference between the effective focal length and the back focal length?

What are the benefits of aspheric lenses compared to standard singlet lenses?

I am looking to prototype an illumination system. My objective is to use a small halogen filament bulb and end up with a beam of light. What would be the best lens or lens combination to give me this projected spot of light?

Back Focal Length (BFL)

Field Curvature

Sag

Rapid Optical Prototyping

Optical Glass

Aberrations

The Airy Disk and Diffraction Limit

What is the difference between an inked lens and a non-inked one?

If I want to design with your lenses and lens assemblies, how do I get the information that I need?

Now that I have chosen my lens, how do I mount it?

Center Thickness (CT)

Chromatic Focal Shift

Conjugate Distance

Épaisseur de bord

Distance focale effective (EFL)

Finite/Finite Conjugate

Power

Singlet Lens

How to Determine Magnification of an Optical Lens Setup

Understanding Collimation to Determine Optical Lens Focal Length

How to Form an Image with an Optical Lens Setup

Modifying Stock Optics Tip #4: Add A Coating To A Stock Lens

Irregularity

Radius of Curvature

BBAR Coating

Diopter

Understanding Surface Quality Specifications

Anti-Reflection (AR) Coating

Bevel

Seamed Edge

Introduction to Basic Ray Optics

Surface Flatness

Transmission

How do I clean my optics?

Clear Aperture (CA)

Refraction

Integration of Optical Systems

Stock and Custom Optics Manufacturing Capabilities

Edmund Optics Global Manufacturing Facilities

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