Dernoo Germanium Supplier -> Germanium Products -> Optical Germanium

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General Capabilities

Materials

Mono-crystalline germanium and Polo-crystalline

Purity

99.9999%(6N)

Type

N

Orientation

<111> or according to your specifications

Resistivity range

5-40 ohm (narrow range or low resistivity according to your request)

CNC capabilities

Yes

Parts type

Windows, blanks, lenses, prisms and abnormity.

Diamond turning capabilities

Outside processing

Coating capabilities

Yes

Tolerance

Diameter: +/- 0.025mm

Thickness+/- 0.025mm

Length & Width: +/- 0.05 ~ +/-0.1mm

Bevel

0.1mm-1mm

Edge chip

<0.5mm

 

Polishing

For spherical parts

Best surface finish

20/10, 20μm, ETV<0.01mm

Max diameter

320mm(mono-crystalline), 380mm(poly-crystalline)

Inspection equipments

Focometer, stressmeter, edge tester, laser plane interferometer, center meter and spherometer, optical flats.

Flatness measure method

Use optical flats

For Plano parts

Best surface finish

Parallelism<2’, 10/5 or 20/10, fringes=0.2λ

Max diameter

320mm(monocrystalline), 380mm(polycrystalline)

 

Coating

Type

Anti-reflective/reflective coating, wide-range reflective coating, reflective coating, IR wide-range anti-reflective coating and hard carbon coating;

3-5μm, 8-12μm, 8-14μm, 3-12μm range, AR coating and metal coating such as golden, silver and protective coating.

Size limitations

Φ300mm

Coating chamber

4 chambers and 5 coating machines

Standard average transmission in the 3-5 micron range for double side anti-reflective coating on 1mm thick optical grade Germanium part.

>97%(avg.)

Diamond-like and Hard carbon coating capability

Transmission>92%(avg.) from 8-12 μm

Inspection equipment

Spectrometer and protractor

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Contact

Tel:+86-25-8650 2518.
Fax:+86-25-8650 0678.
E-mail:info@chinadernoo.com

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