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200mm Dia., 4mm Thick, MgF₂ Coated, B270 Window

Name: 200mm Dia., 4mm Thick, MgF 2 Coated, B270 Window
Brand: TECHSPEC
SKU: 17-182
Price: ₹44,805

See More by SCHOTT Optical Components

Stock #17-182 10 to 12 days

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₹44,805

Qty 1-5
₹44,805

Qty 6+
₹35,844

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Imaging Lens Selector

Abbe Number (v_d):

58.3

Bevel:

Protective as needed

Clear Aperture CA (mm):

180.00

Diameter (mm):

200.00 +0.00/-0.25

Thickness (mm):

4.00 ±0.20

Coating:

MgF₂ (632.8nm)

Coating Specification:

R_avg ≤1.50% @ 632.8nm (N-BK7)

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

9.4 (+20 to +300°C)

Density (g/cm³):

2.56

Edges:

Fine Ground

Index of Refraction n_d:

1.523

Knoop Hardness (kg/mm²):

500

Poisson's Ratio:

0.22

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

B270

Surface Flatness (P-V):

1λ (per 25.4mm Dia. within CA)

Surface Quality:

60-40

Type:

Protective Window

Wavelength Range (nm):

400 - 700

Young's Modulus (GPa):

71.5

10 J/cm² @ 532nm, 10ns

Regulatory Compliance

RoHS 2015:

Compliant

Certificate of Conformance:

View

Reach 235:

Compliant

Product Family Description

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.