Name: 5mm Diameter, VIS-NIR Coated, B270 Window
Brand: TECHSPEC
SKU: 26-571
Price: A$77.20

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5mm Diameter, VIS-NIR Coated, B270 Window

Stock #26-571 3-5 days

- +

A$77^.20

Qty 1-5
A$77.20

Qty 6+
A$62.40

Volume Pricing
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Product Downloads

STEP:step

PDF Drawing:pdf

IGES:igs

eDrawing:eprt

EO Spec Sheet

Specifications

General

Type:

Protective Window

Physical & Mechanical Properties

Bevel:

Protective as needed

Clear Aperture CA (mm):

4.50

Diameter (mm):

5.00 ±0.25

Thickness (mm):

1.00

Edges:

Fine Ground

Knoop Hardness (kg/mm²):

500

Poisson's Ratio:

0.22

Young's Modulus (GPa):

71.5

Optical Properties

Abbe Number (v_d):

58.3

Coating:

VIS-NIR (400-1000nm)

Coating Specification:

R_avg ≤0.25% @ 880nm
R_avg ≤1.25% @ 400 - 870nm
R_avg ≤1.25% @ 890 - 1000nm

Index of Refraction (n_d):

1.523

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

B270

Surface Flatness (P-V):

1λ

Surface Quality:

60-40

Wavelength Range (nm):

360 - 2700

5 J/cm² @ 532nm, 10ns

Material Properties

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

9.4 (+20 to +300°C)

Density (g/cm³):

2.56

Regulatory Compliance

RoHS 2015:

Compliant

Certificate of Conformance:

View

Reach 235:

Compliant

Product Details

Large Selection of Sizes
Available Uncoated, MgF2, or VIS-NIR Anti-Reflection (AR) Coated
Custom Sizes Available for Volume OEM Requirements

TECHSPEC® B270 Windows offer a high transmission from the visible to the near-infrared (NIR). They have a similar refractive index to N-BK7 while being more cost-effective. These windows are often used as a protective element due to their high solarization stability and chemical resistance, making them ideal for standard window applications. TECHSPEC® B270 Windows are available either uncoated or coated with a MgF2 or VIS-NIR Anti-Reflection (AR) Coating. Both circular and square options are offered in various sizes, and custom sizes and coatings are available for OEM applications.

Coating Curves

VIS-NIR (400-1000nm)

Only 2 different Y Axises can be displayed at one time.

Imaging Lens Selector

Frequently Purchased Together

Compatible Mounts

Title	Type	Stock Number	Price	Buy
5.0mm Optic Dia., Optic Mount	Fixed	#64-551	A$48.80 Request Quote	3-5 days ×
5.0 - 25.0mm Optic Height, Metric Bar-Type Optic Holder	Fixed	#55-529	A$152.00 Request Quote	3-5 days ×
4.0 - 36.0mm Optic Dia., Self-Centering Jaw Clamp	Fixed	#16-077	A$235.20 Request Quote	3-5 days ×
5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp	Fixed	#16-078	A$612.80 Request Quote	3-5 days ×

Check out our full selection of mounts here.

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

Beam Displacement Calculator

View Now

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.

View Now

Optical Windows Review

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

View Now

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?

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

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.

View Now

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.

View Now

Surface Flatness

View Now

Transmission

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

5mm Diameter, VIS-NIR Coated, B270 Window

Specifications

General

Physical & Mechanical Properties

Optical Properties

Material Properties

Regulatory Compliance

Product Details

Technical Information

Accessories

Coating Curves

Related Products

Imaging Lens Selector

Frequently Purchased Together

Compatible Mounts

Resources

Anti-Reflection (AR) Coatings

An Introduction to Optical Coatings

Beam Displacement Calculator

Understanding Optical Windows

Optical Windows Review

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?

Optical Glass

Surface Accuracy

BBAR Coating

Understanding Surface Quality Specifications

Removing Protective Plastic Coating

Anti-Reflection (AR) Coating

Bevel

Parallelism

Seamed Edge

Introduction to Basic Ray Optics

Surface Flatness

Transmission

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