Name: 50.8mm Dia., 3.18mm Thick, Uncoated, Sapphire Window
Brand: TECHSPEC
SKU: 45-817
Price: S$577.50

Abbe Number (v_d):

72.24

Axis Orientation:

Random

Bevel:

Protective as needed

Birefringence (n_o-n_e):

0.008 for Visible Light Orthogonal to Optical Axis

Clear Aperture (%):

≥90

Clear Aperture CA (mm):

45.72

Diameter (mm):

50.80 ±0.05

Thickness (mm):

3.18 ±0.05

Coating:

Uncoated

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

8.8

Density (g/cm³):

3.97

Edges:

Fine Ground

Index of Refraction n_d:

1.77

Knoop Hardness (kg/mm²):

1900

Parallelism (arcmin):

≤3.5

Poisson's Ratio:

0.27

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

Sapphire (Al₂O₃)

Surface Flatness (P-V):

2λ (typical)

Surface Quality:

80-50

Type:

Protective Window

Wavelength Range (nm):

330 - 5500

Young's Modulus (GPa):

435

Regulatory Compliance

RoHS 2015:

Compliant

Reach 224:

Compliant

Certificate of Conformance:

View

Product Family Description

Features Extreme Surface Hardness Chemical Resistance
Transmits Wavelengths Ranging From UV to Mid-Infrared
Thinner and Stronger than Standard Glass Windows
Anti-Reflection Coating Options Covering 400 - 5000nm Available

TECHSPEC® Sapphire Windows are manufactured from single crystal sapphire, making them ideal for demanding applications (such as laser systems) because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamond and, because of their structural strength, sapphire windows can be made much thinner than other common windows with improved transmittance. Chemically, sapphire is single crystal aluminum oxide (Al₂O₃) and is useful in a transmission range from 330 - 5500nm when uncoated. TECHSPEC® Sapphire Windows are available with anti-reflection (AR) coatings to improve performance in the visible, NIR, and IR spectra with coating options covering 400 - 5000nm.

Title	Type	Stock Number	Price	Buy
50.8mm Optic Dia., Optic Mount	Fixed	#64-569	S$57.00 Qty 10+ S$51.30 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 ×
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 ×
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 ×
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 ×
50.0/50.8mm Optic Dia., Kinematic Mirror Mount	Adjustable - Tip-Tilt	#55-005	S$495.00 Qty 5+ S$470.25 Request Quote	3-5 days ×
50.0/50.8mm 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 ×