Name: 50mm Diameter Uncoated, B270 Window
Brand: TECHSPEC
SKU: 45-644
Price: S$85.50

Abbe Number (v_d):

58.3

Bevel:

Protective as needed

Clear Aperture CA (mm):

45.00

Diameter (mm):

50.00 ±0.25

Thickness (mm):

3.00

Coating:

Uncoated

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

Wavelength Range (nm):

360 - 2700

Young's Modulus (GPa):

71.5

Regulatory Compliance

RoHS 2015:

Compliant

Reach 224:

Compliant

Certificate of Conformance:

View

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
50.0mm Optic Dia., Optic Mount	Fixed	#64-567	S$85.50 Qty 10+ S$76.95 Request Quote	Contact Us ×
50.0mm Optic Dia., Optic Mount	Fixed	#64-568	S$85.50 Qty 10+ S$76.95 Request Quote	3-5 days ×
9.5 - 73.0mm Optic Dia., Three-Screw Adjustable Ring Mount	Fixed	#36-605	S$111.00 Qty 10+ S$98.10 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., E-Series Kinematic Mount	Adjustable - Tip-Tilt	#15-867	S$127.50 Qty 10+ S$121.05 Request Quote	3-5 days ×
50.0mm Optic Dia., Fixed Optic Mount, Quick Start Optical Mounts	Fixed	#17-516	S$147.45 Request Quote	Contact Us ×
19.5 - 108.0mm Optic Dia., Three-Screw Adjustable Ring Mount	Fixed	#03-670	S$151.50 Qty 10+ S$133.80 Request Quote	3-5 days ×
10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder	Fixed	#55-530	S$151.50 Qty 10+ S$136.35 Request Quote	3-5 days ×
7.0 - 67.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-669	S$154.50 Qty 10+ S$139.05 Request Quote	3-5 days ×
8.0 - 118.0 Optic Height, English Bar-Type Optic Holder	Fixed	#03-666	S$160.50 Qty 10+ S$144.45 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., Kinematic Mount, 2-Screws	Adjustable - Tip-Tilt	#58-852	S$162.00 Qty 5+ S$145.80 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., Kinematic Mount, 3-Screws	Adjustable - Tip-Tilt	#58-855	S$189.00 Qty 5+ S$170.10 Request Quote	3-5 days ×
50/50.8mm Diameter, E-Series Kinematic Mount, Quick Start Optical Mounts	Adjustable - Tip-Tilt	#17-522	S$198.45 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., Optical Cell Assembly	Fixed	#36-465	S$211.50 Qty 10+ S$187.50 Request Quote	3-5 days ×
2"/50.8mm Diameter, Bar Type Lens / Filter Holder, Quick Start Optical Mounts	Fixed	#17-530	S$215.55 Request Quote	Contact Us ×
50/50.8mm Dia., Kinematic Mount, 3-Screws, Quick Start Optical Mounts	Adjustable - Tip-Tilt	#17-524	S$259.95 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., X-Y Translating Optic Mount	Adjustable - Linear (XY)	#62-957	S$423.00 Qty 5+ S$401.85 Request Quote	3-5 days ×
50.0/50.8mm Optic Diameter, X-Y Translating Optic Mount, Quick Start Optical Mounts	Adjustable - Linear (XY)	#17-514	S$484.05 Request Quote	Contact Us ×
50.0mm Optic Dia., Kinematic Mirror Mount	Adjustable - Tip-Tilt	#55-004	S$495.00 Qty 5+ S$470.40 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., Kinematic Mirror Mount	Adjustable - Tip-Tilt	#55-005	S$495.00 Qty 5+ S$470.25 Request Quote	3-5 days ×
50.0mm Optic Dia., Kinematic Mirror Mount with Micrometer	Adjustable - Tip-Tilt	#55-457	S$531.00 Qty 5+ S$504.60 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., Kinematic Mirror Mount with Micrometer	Adjustable - Tip-Tilt	#56-326	S$531.00 Qty 5+ S$504.45 Request Quote	3-5 days ×
5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp	Fixed	#16-078	S$550.50 Qty 5+ S$485.55 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., Kinematic Mirror Mount with Micrometer, Quick Start Optical Mounts	Adjustable - Tip-Tilt	#17-520	S$620.85 Request Quote	Contact Us ×
50.0/50.8mm Optic Dia., Precision Gimbal Mount	Adjustable - Gimbal	#55-000	S$703.50 Qty 5+ S$633.15 Request Quote	3-5 days ×
50/50.8mm ID, Precision Gimbal Mount, Quick Start Optical Mounts	Adjustable - Gimbal	#17-518	S$767.85 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., X-Y-Z Translating Optic Mount	Adjustable - Linear (XYZ)	#62-960	S$828.00 Qty 5+ S$786.60 Request Quote	3-5 days ×
50.0/50.8mm Optic Dia., 5 Axes Optical Mount	Adjustable - Linear (XYZ) & Tip-Tilt	#13-778	S$1,152.00 Qty 5+ S$1,094.40 Request Quote	3-5 days ×