Gold Member Since 2017
Audited Supplier
Changchun Yutai Optics Co., Ltd.

Single Crystal Germainum, Optical Crystal, Laser Windows manufacturer / supplier in China, offering Ge Crystal, Hot Sale 10X25 Vision Night Pocket Powerview Monocular Telescope, Optical N-Bk7 Glass Corner Cube, Pryamid Prism and so on.

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Ge Crystal

FOB Price: US $1 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $1/ Piece
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Port: Changchun, China
Production Capacity: 40000/Year
Payment Terms: T/T, Western Union, Paypal

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Basic Info
  • Model NO.: D5~D200
  • Type: Cylindrial
  • Shape: Single-lens
  • Lenses Color: Clear
  • Customized: Customized
  • Color: Transparent
  • Trademark: Yutai
  • Specification: 12.7mm
  • HS Code: 9001909090
  • Usage: Medical, Optical, Photography
  • Transmittance: >95%
  • Material: Optical Glass
  • Certification: RoHS
  • Coating: HMC
  • Polished: Yes
  • Transport Package: Box
  • Origin: Changchun
Product Description
Ge Crystal
Germanium is a high index material that is used to manufacture Attenuated Total reflection (ATR) prisms for spectroscopy. Its refractive index is such that germanium makes an effective natural 50% beamsplitter without the need for coatings. It is also used extensively as a substrate for production of optical filters. Germanium covers the whole of the 8-14 micron thermal band and is used in lens systems for thermal imaging. It can be AR coated with diamond producing an extremely tough front optic. Its transmission is very temperature sensitive, becoming opaque near 100C. Environment does not cause problems because Germanium is inert, mechanically rugged, and fairly hard.
Germanium is grown by Czochralski pulling techniques. It is relatively expensive. The refractive index changes rapidly with temperature and material becomes opaque at all wavelengths a little above 293K.

Maximum available size: 100 mm Dia x 50 mm Thk.

Ge Crystal
 

 

 
BASE PROPERTIES
PARAMETER
VALUE
OPTICAL
 
Transmission Range
1.8 to 23 microns
Refractive Index
4.0026 at 11 microns
Reflection Loss
53% at 11 microns (2 surfaces)
Absorption Coefficient
1.3 x 10-3e cm-1 at 3.8 microns
dN/dT
-10.6 x 10-6e/C
dN/d = 0
R. I. almost constant
  
PHYSICAL
 
Density
5.33 g/cm3
Melting Point
936 C
Thermal Conductivity
58.61 W/(m*K)at 293K
Thermal Expansion
6.1 x 10-6e/C at 298K
Hardness
Knoop 780 kg/mm2 (100)
Specific Heat Capacity
310J/(kg K)
Dielectric Constant
16.6 at 9.37GHz at 300K
Young's Modulus (E)
102.7 GPa
Shear Modulus (G)
67 GPa
Bulk Modulus (K)
77.2 GPa
Elastic Coefficients
C11 = 129 C12 = 48.3 C44 = 67.1
Apparent Elastic Limit
89.6 MPa (13000psi)
Poisson Ratio
0.28
CHEMICAL
 
Solubility
Insoluble in water
Molecular Weight
72.59
Class/Structure
Cubic diamond, Fd3m
REFRACTIVE INDEX      
Wavelength, m
2.06
2.15
2.44
2.58
3.00
3.42
Refractive Index
4.10
4.09
4.07
4.06
4.05
4.03
 
 
 
 
 
 
 
Wavelength, m
4.36
6.24
8.66
9.72
11.04
13.02
Refractive Index
4.03
4.01
4.00
4.00
4.00
4.00
 

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Ge Crystal


Factory information


Yutai Optics, we specialize in the design and volume manufacturing of high performance optical components such as lens,prisms,windows,filters,mirrors and more for use in optical instruments and laser systems, as well as for military, telecommunications,medical, environment monitoring industry.
Yu Tai Optics has quickly established itself as a leader in optical components from its advanced technology and quality control. 
Factory
Ge Crystal

 
Packaging & Shipping

 1 Package Detail: A. Standard carbon and envelop with plastic foam.

                               B. Safety green carton.

                               C. Customized.

Ge Crystal
 

2 Delivery Detail: Within 30 days.(Also depand on the quantity)


Ge Crystal
 
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