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Manufacturer

OJSC GERMANIUM

660027, Russia, Krasnoyarsk, Transportniy proezd,1/107

germanium@made-in-zelenograd.com

Blanks for optical components

Blanks (discs, windows, generated blanks)

Mode from mono and polycrustalline germanium

Shapes:round, rectangular, spherical

Optical properties
Refraction coefficient at 20 °C and λ=10 µm, "n"n=4.0032±0.0002
Homogeneity of refractive coefficient, Δn≤2×10-4
Temperature coefficient at 20—25 °C, dn/dT, C-1≤-4×10-4
Absorption coefficient (extinction indicator) atλ=10.6 µm, αλαλ not more than 0.03 cm-1
material characteristics measured at the producer
ParametersMonoPolyMethod of measurement
Orientation[111]±2° -GOST 16153
ASTM F 26
X-Ray Diffraction
GOST 16153
ConductivityNNASTM F 42
Hot-Probe method
DopantSbSb-
GOST 24392
Resistivity, Ohm×cmstandart 5-40, other as agreedstandart 5-40, other as agreedASTM 43
Four-Probe,
Two-Probe
Transmission46% min in the range λ=2-10 µm through polished sample, 20 mm thick.FTIR-Spectrometry
ASTM F 120
Geometry: plano blanks
ParameterSizesTolerance
Diameter, mm10-1500.05 mm
Maximum size of rectangular disk, mmPoly-Ge - 300×250 (length×width)For diagonal <100 mm - 0.1 mm
Mono-Ge - diagonal 200 mm maximumFor diagonal > 100 mm - 0.2 mm
Cylindrical shape, mm0.03
Roundness, mm0.01
Perpandicularity, flatness, parallelism, mm0.03 mm - for diameter <80 mm
0.05 mm fordiameter 80 - 120 mm
0.1 mm - for diameter > 120mm
Chamfer, mmStandart 0.1 - 0.8. Protective chamfer on rectangular disk, not less than 0.5 mm
Surface finish R, µm, not more16
Geometry: generated blanks
ParameterSizeTolerance
Diameter, mm12-2500.05
Cylindrical shape, mm0.01
Roundness, mm0.01
Central thickness, Sag, total height, mm0.03
Curve, mmfrom ∞ till ½ of diameter;Value of an of deflection arrow of a spherometer - not less than 7 ^micro;m
ETV, mmFor diameter ≤ 200 mm0.03
For diameter > 200 mm0.05
Chamfer, mmStandard 0.1 - 0.8
Surface finish, Ra, µm, not more1.0
Note

Special requirements, other remarks, which are not include into above specification - as agreed.

Package

Thermal package (vacuum sealing), then put into a wooden case or cartoon box.

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