Name: 20mm Diameter MgF 2 Coated, B270 Window
Brand: TECHSPEC
SKU: 32-950
Price: €36,50

20mm Diameter MgF₂ Coated, B270 Window

Abbe Number (v_d):

58.3

Bevel:

Protective as needed

Clear Aperture CA (mm):

18.00

Diameter (mm):

20.00 ±0.25

Thickness (mm):

2.00

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

Surface Quality:

60-40

Type:

Protective Window

Typical Energy Density Limit:

10 J/cm² @ 532nm, 10ns

Wavelength Range (nm):

400 - 700

Young's Modulus (GPa):

71.5

Type of Window:

Glass

10 J/cm² @ 532nm, 10ns

Regulatory Compliance

RoHS 2015:

Compliant

Certificate of Conformance:

View

Reach 233:

Compliant

Product Family Description

Large Selection of Sizes
Available Uncoated or with a MgF₂ Anti-Reflection Coating
Custom Sizes Available for Volume OEM Requirements

TECHSPEC® B270 Windows are ideal for commercial applications requiring a thin substrate. Available uncoated or with a MgF₂ Anti-Reflection coating, these windows are often used as a protective element between two environments. Custom sizes and coatings are available for OEM applications.

Title	Type	Stock Number	Price	Buy
8.0 - 118.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-666	€107,00 Qty 10+ €96,30 Request Quote	3-4 days ×
2.0 - 35.0mm Optic Dia., Three-Screw Adjustable Ring Mount	Fixed	#03-668	€59,00 Qty 10+ €52,40 Request Quote	3-4 days ×
7.0 - 67.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-669	€103,00 Qty 10+ €92,70 Request Quote	3-4 days ×
19.5 - 108.0mm Optic Dia., Three-Screw Adjustable Ring Mount	Fixed	#03-670	€101,00 Qty 10+ €89,20 Request Quote	3-4 days ×
7.0 - 40.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-676	€95,00 Qty 10+ €85,50 Request Quote	In Stock ×
9.5 - 73.0mm Optic Dia., Three-Screw Adjustable Ring Mount	Fixed	#36-605	€74,00 Qty 10+ €65,40 Request Quote	3-4 days ×
5.0 - 25.0mm Optic Height, Metric Bar-Type Optic Holder	Fixed	#55-529	€93,00 Qty 10+ €83,70 Request Quote	3-4 days ×
10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder	Fixed	#55-530	€101,00 Qty 10+ €90,90 Request Quote	Contact Us ×
20.0mm Optic Dia., Optic Mount	Fixed	#64-559	€31,00 Qty 10+ €27,90 Request Quote	3-4 days ×
4.0 - 36.0mm Optic Dia., Self-Centering Jaw Clamp	Fixed	#16-077	€141,00 Qty 5+ €124,10 Request Quote	3-4 days ×
5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp	Fixed	#16-078	€367,00 Qty 5+ €323,70 Request Quote	3-4 days ×
2"/50.8mm Diameter, Bar Type Lens / Filter Holder, Quick Start Optical Mounts	Fixed	#17-530	€143,70 Request Quote	3-4 days ×

20mm Diameter MgF2 Coated, B270 Window

Regulatory Compliance

Product Family Description

20mm Diameter MgF₂ Coated, B270 Window