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See all 3 Products in Family

38.1mm Dia. x 2mm Thick, 3-5μm AR Coated & DLC Coated, ISP Optics Silicon (Si) Window | DLC35-SI-W-38-2

Name: 38.1mm Dia. x 2mm Thick, 3-5μm AR Coated & DLC Coated, ISP Optics Silicon (Si) Window | DLC35-SI-W-38-2
Brand: ISP Optics
SKU: 24-647
Price: ₹36,000

See More by ISP Optics

Diamond-Like Carbon (DLC) Coated Silicon Windows

Stock #24-647 Clearance 10 to 12 days

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₹36,000

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₹36,000

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PDF Drawing:pdf

IGES:igs

eDrawing:eprt

EO Spec Sheet

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

Specifications

General

Type:

Protective Window

Note:

Arrow on substrate edge points towards DLC coated surface

Model Number:

DLC35-SI-W-38-2

Physical & Mechanical Properties

Bevel:

Protective as needed

Clear Aperture (%):

Clear Aperture CA (mm):

32.38

Diameter (mm):

38.10 +0.00/-0.13

Thickness (mm):

2.00 ±0.13

Edges:

Fine Ground

Knoop Hardness (kg/mm²):

1150

Parallelism (arcmin):

Poisson's Ratio:

0.265

Young's Modulus (GPa):

140

Optical Properties

Coating:

S1: DLC Coating
S2: BBAR (3000-5000nm)

Coating Specification:

AR: R_avg ≤0.5% @ 3000 - 5000nm

Index of Refraction (n_d):

3.422 @ 5µm

Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More

Silicon (Si)

Surface Flatness (P-V):

λ/10 @ 10.6μm

Surface Quality:

40-20

Wavelength Range (nm):

3000 - 5000

Coating Temperature (°F):

AR: -80 to +160 per MIL-C-48497C DLC: -80 to +160 per MIL-C-48497C

Material Properties

Coefficient of Thermal Expansion CTE (10^-6/°C):

2.55

Density (g/cm³):

2.33

Environmental & Durability Factors

Coating Abrasion:

AR: Moderate, per MIL-C-48497C DLC: Severe, per MIL-C-48497C

Coating Adhesion:

AR: per MIL-C-48497C DLC: per MIL-C-48497C

Coating Humidity:

AR: 24 Hours per MIL-C-48497C DLC: 24 Hours per MIL-C-48497C

Coating Salt Solubility:

AR: N/A DLC: ≥24 Hours Immersion per MIL-C-675C

Coating Salt Spray:

AR: N/A DLC: ≥72 Hours per MIL-C-675

Coating Solubility and Cleaning:

AR: per MIL-C-48497 DLC: per MIL-C-48497

Coating Wiper Durability:

AR: N/A DLC: ≥1,000 Wipes of Sand/Slurry per TS-1888

Regulatory Compliance

RoHS 2015:

Compliant

Certificate of Conformance:

View

Reach 240:

Compliant

Product Details

Meets Severe Abrasion Requirements of MIL-F-48616 and MIL-C-48497C
High Transmission from 3 – 5µm
Ideal for Harsh Environments
Diamond-Like Carbon (DLC) Coated Germanium Windows Also Available

ISP Optics Diamond-Like Carbon (DLC) Coated Silicon Windows provide anti-reflection coating on one surface and a specially designed DLC coating on the other surface, making these windows highly durable and ideal for harsh environments. The DLC Coated surface is designed to withstand temperature cycling from -80 to +160°F, salt spray for a continuous period of 72 hours, and 1,000 wiper oscillations in a sand and slurry mixture. Further, these windows meet the MIL-F-48616 and MIL-C-48497C requirements for severe abrasion. Silicon features a Knoop Hardness of 1150 and low density, making it tougher than germanium substrates and suitable for weight-sensitive applications, respectively. ISP Optics Diamond-Like Carbon (DLC) Coated Silicon Windows are engineered for 3 to 5µm, making them ideal for infrared defense applications such as thermal imaging.

Technical Information

Coating Specifications
Specification	AR Coating	DLC Coating
Adhesion	per MIL-C-48497C	per MIL-C-48497C
Abrasion	Moderate, per MIL-C-48497C	Severe, per MIL-C-48497C
Humidity	24 Hours per MIL-C-48497C	24 Hours per MIL-C-48497C
Salt Solubility	-	≥24 Hours Immersion per MIL-C-675C
Salt Spray	-	≥72 Hours per MIL-C-675
Temperature (°F)	-80 to +160 per MIL-C-48497C	-80 to +160 per MIL-C-48497C
Solubility and Cleaning	per MIL-C-48497	per MIL-C-48497
Wiper	-	≥1,000 Wipes of Sand/Slurry per TS-1888
Coating Temperature (°F)	-80 to +160 per MIL-C-48497C	-80 to +160 per MIL-C-48497C

Accessories

Related Products

Diamond-Like Carbon (DLC) Coated Germanium Windows

Silicon (Si) Windows

ISP Optics AMTIR-1 Windows

E-Series Kinematic Optical Mirror Mounts

Imaging Lens Selector

Frequently Purchased Together

#31-417 - 17 x 23mm, 4-6λ Mirror

₹1,401

#18-490 - Roll of Cheesecloth, MIL-CCC-440 (2 Sq. Yards)

₹2,768

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.

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An Introduction to Optical Coatings

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

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Advantages of using engineered chalcogenide glass for color corrected, passively athermalized LWIR imaging systems

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Infrared Light

Optical Engineer Andrew Fisher explains how you can see the "invisible" light, or infrared light, from your own TV remote.

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Short Wave Infrared (SWIR)

View Now

Beam Displacement Calculator

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Understanding Optical Windows

Determine how to select an optical window based on its material transmission, thermal and mechanical properties, and other specifications at Edmund Optics.

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Optical Windows Review

Optical Windows provide protection between an optical system or sensitive electronics and an outside environment.

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I need a window for imaging underwater. The water is filtered and at room temperature with a very small amount of detergent in it. It is flowing at low speed. Will a MgF2 coated window survive this for a few years?

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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.

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The Correct Material for Infrared (IR) Applications

Using an Infrared Application? Discover the importance of choosing the right material and comparisons of each at Edmund Optics.

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Is it okay to clean an infrared lens, for example one made of germanium, with ethanol?

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Infrared (IR) Spectrum

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UV vs. IR Grade Fused Silica

UV grade fused silica is ideal for UV and visible applications, but IR grade fused silica has better transmission in the IR due to a lack of OH- impurities.

View Now

What is SWIR?

Have a question about short-wave infrared (SWIR)? Find definitions, application uses, and examples at Edmund Optics.

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Hyperspectral and Multispectral Imaging

Are you trying to gauge depth of field in your imaging system? Take a closer look at this article on depth of field calculations at Edmund Optics.

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Hyperspectral & Multispectral Imaging – TRENDING IN OPTICS: EPISODE 7

Hyperspectral and multispectral imaging are imaging technologies that capture information from a broader portion of the electromagnetic spectrum.

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You offer many substrates for UV and IR applications. How do I know which is best for me?

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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.

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Surface Accuracy

View Now

BBAR Coating

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

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.

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Anti-Reflection (AR) Coating

View Now

Bevel

View Now

Parallelism

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.

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Surface Flatness

View Now

Transmission

View Now

How do I clean my optics?

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Clear Aperture (CA)

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Edmund Optics Global Manufacturing Facilities

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

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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.

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Surface Quality

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