Single Crystal Germanium Prism

Single Crystal Germanium Prism, High Quality Germanium Prisms,Right Angle Germanium Prism,Ge Prism

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Description

Overview

Quick Details

Place of Origin:: Hubei, China (Mainland), Wuhan,Hubei,China

Brand Name:: Wuhan Especial Optic.,INC

Model Number:: Single Crystal Germanium Prism

Material:: Germanium, Single Crystal Germanium

Surface Quality:: 40/20, 40/20

Dimension Tolerance:: 0.1mm, +/-0.1

Angle Tolerance:: 3 Arc Min, +/-1 arc min

Flatness:: 1/4 Lambda, Lambda/4 or customized

Coating:: Reflection Coating 8-14um,3-12um,3-5um

Maximum Diameter:: 320mm

Clear aperture:: 95%

Usage:: optical

Packaging & Delivery

Packaging Details: First optical special paper
Then plastic foam packaging film
And hard carton box with quakeproof filler

Delivery Time: Shipped in 40 days after payment

Product Description

Single Crystal Germanium Prism

Germanium Prism

Germanium is used widely for lenses and windows in thermal imaging, FLIR applications, as germanium viewports. Its high index of refraction (about 4) makes it of particular interest. Useful transmission range of Germanium windows is from 2 to 13µm. Germanium is opaque in the visible.

Custom germanium windows ,lenses and prisms are available in any size and configuration. Anti-reflection coatings can be applied for 2-14µm or 8-12µm (BBAR coating or DLC/BBAR) depending on your custom application.

Germanium is used widely for lenses and windows in thermal imaging, FLIR applications, as germanium viewports. Its high index of refraction (about 4) makes it of particular interest. Useful transmission range of Germanium windows is from 2 to 13µm. Germanium is opaque in the visible.

Custom germanium windows ,lenses and prisms are available in any size and configuration. Anti-reflection coatings can be applied for 2-14µm or 8-12µm (BBAR coating or DLC/BBAR) depending on your custom application.

	Standard precision	High-precision
Dimension Tolerance	φ5-250mm+0/-0.2	φ3-350mm+0/-0.2
Angle Tolerance	1-50mm+/-0.1	1-50mm
Surface Quality	60/40	20/10
Flatness	N<λ/2@633nm(at 50mm)	N<λ/10@633nm(at 50mm)
Clear Aperture	>90%	>95%
Chamfer	Protected <0.5mmx45deg	Protected <0.5mmx45deg

Germanium properties
Chemical Formula	Ge
Crystal Form	Poly or Single Crystal
Crystal Class	Cubic
Resistivity, Ohm*cm	5-40
Lattice Constant, Å	5.66
Molecular Weight	72.60
Density, g/cm3 at 300 K	5.33
Dielectric Constant for 9.37 x 109 Hz at 300 K	16.6
Melting Temperature, K	1210
Thermal Conductivity, W/(m K) at 293 K	59
Thermal Expansion, 1/K at 298 K	6.1 x 10-6
Specific Heat, cal/(g K) at 273-373 K	0.074
Debye Temperature, K	370
Bandgap, eV	0.67
Solubility in water	None
Knoop Hardness, kg/mm2	800
Mohs Hardness	6.3
Young's Modulus, GPa	102.66
Shear Modulus, GPa	67.04
Bulk Modulus, GPa	77.86
Poisson's Ratio	0.278