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10um Ga Doped Germanium Substrate Ge Window For Infrared Co2 Lasers

10um Ga Doped Germanium Substrate Ge Window For Infrared Co2 Lasers

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    Ga Doped Germanium Substrate

    ,

    10um Germanium Lenses

    ,

    Ge Window For Infrared Co2 Lasers

  • Material
    Germanium Crystal
  • Orientation
    100
  • Size
    2inch
  • Thickness
    500um
  • Doped
    N-type Sb-Doped Or Ga-doped
  • Surface
    SSP
  • Ttv
    《10um
  • Resistivity
    1-10ohm.cm
  • MOQ
    10PCS
  • Application
    Infrared Band
  • Place of Origin
    CHINA
  • Brand Name
    ZMSH
  • Certification
    ROHS
  • Model Number
    2iNCH Ge wafers
  • Minimum Order Quantity
    3PCS
  • Price
    by specification
  • Packaging Details
    single wafers container box under 100 grade cleaning room
  • Delivery Time
    2-4weeks;
  • Payment Terms
    T/T, Western Union
  • Supply Ability
    100pcs/month

10um Ga Doped Germanium Substrate Ge Window For Infrared Co2 Lasers

 

4inch N-type Ge wafers Germanium substrate Ge window for infrared Co2 lasers

 

Ge Material Introduce

Among optical materials, germanium materials are increasingly widely used in infrared and night vision technologies. Germanium belongs to the IV main group element and has a diamond structure. Germanium has relatively superior physical and chemical properties. It is mainly used in semiconductor materials, infrared optical materials, chemical catalysts, medical applications and some other new use fields, especially as an excellent of infrared optical materials used. Germanium is insoluble in water, chemically stable, and it is opaque in the visible light region. Germanium has good permeability to microwaves. Germanium is a relatively brittle material and has poor mechanical shock resistance. When germanium is used as an infrared material, the processing focus is to ensure that the surface of the material has a high finish and good transmittance. Compared with optical glass, germanium has certain advantages in mechanical properties, so germanium crystal is selected as the processing material for turning technology for experiments. After many experiments, using germanium crystal as optical processing material and ordinary CNC lathe as processing equipment, a set of turning process has been developed to replace the traditional optical parts processing and grinding process. labor efficiency.

 

Using CO2 laser as light source and pyroelectric camera as detector, single-slit diffraction images were collected. According to the principle of single-slit diffraction, the monochromatic focal lengths of a group of infrared germanium lenses with different focal lengths were measured, and the measured results were given. The main error factors affecting the test. By calculating the modulation transfer function of the sampled data, the position of the focal plane of the lens under test can be accurately determined. The accurate calibration method of the length and size of the image acquisition system is introduced.

 

In the visible light range, the commonly used methods for determining the focal length are: magnification method, precision goniometer method, Abbe focal length meter method, etc. The above methods are based on the principle of geometric optics, for visible light. According to the principle of physical optics, and The monochromatic focal length of the lens can be measured by methods such as Taber effect and single-slit diffraction. Most of these methods use commercialized CCDs as photodetectors. In the infrared band, especially in the mid-far infrared band, the infrared light is invisible , and the high-precision photodetectors used in the infrared band are expensive and are not widely used, so it is generally difficult to measure the focal length of infrared optical systems. The focal length of the system is measured. With the development of infrared thermal imaging technology, the quality of the infrared optical system becomes more and more important. As the basic characteristic parameter of the infrared optical system, the focal length must be accurately determined. The principle is to measure the focal length of the infrared germanium lens with a CO2 laser as the light source.

Germanium substrate

the Products we can provide  

 
Item
Y/N
Item
Y/N
Item
Y/N
Germanium crystal
yes
Electronic Grade
yes
N type
yes
Germanium blank
yes
Infrared Grade
yes
P type
yes
Germanium substrate
yes
Cell Grade
yes
Undoped
ye
Thermal properties:
Thermal Expansion
5.9 x 10-6 °C -1 @ 300K
Melting Point
937°C
Thermal diffusivity
0.36 cm2s-1
Thermal conductivity
0.58 W cm-1 °C-1
Specific heat
0.31 J g-1 °C-1
Mechanical properties:
Young Modulus
10.3x1011 dyn cm-2 @ 300K
Shear Modulus
4.1x 1011 dyn cm-2
Knoop Hardness
780 kg mm-2
Poisson constant
0.26
Electrical properties:
Di-electric constant
16.2
Resisitivity
9.0 ohm cm
Optical properties:
Transmission
2 - 14μm fino a circa 45°
Refractive Index
4.025 @ 4μm
4.005 @ 10μm

Product detail:

mpurity level less than 10³ atoms/cm³

Material :                    Ge
Growth :                        cz
Grade :             Prime grade
Type/dopant : Type-N, undoped
Orientation : [100] ±0,3º
Diameter : 100,0 mm ±0,2 mm
Thickness : 500 µm ±25 µm
Flat : 32 mm ±2 mm @ [110]±1º
Resistivity : 55-65 Ohm.cm
EPD : < 5000
Front side : Polished (epi-ready, Ra <0,5 nm)
Back side : Ground/etched
TTV : <10; BOW :<10; WARP :<15um;
Particles : 0.3
Laser marking : none
Packaging : single wafer


10um Ga Doped Germanium Substrate Ge Window For Infrared Co2 Lasers 0

10um Ga Doped Germanium Substrate Ge Window For Infrared Co2 Lasers 1

product description:

Germanium's wide spectral operating range (2-16µm) and opacity in the visible spectral range make germanium well suited for infrared laser applications.

 

It also does not react easily with air, water, alkali metals and acids (except nitric acid). (Processing size: Φ5-Φ150)

application:

 

Germanium lenses are mainly used in infrared thermometers, infrared thermal imagers, infrared lenses, Co2 lasers and other equipment.

Our advantage:

 

ZMSH produces germanium lenses, which use optical-grade single-crystal germanium as the base material and are processed with a new polishing technology.

 

High surface precision, 8-14μm anti-reflection film will be coated on two sides of germanium lens, which can greatly reduce the reflectivity of the substrate and enhance the anti-reflection effect.

 

The transmittance of the membrane working band reaches more than 95%.