MIC Sapphire

Dimensional range, limit deviation (mm)

Square window Item Length L1 Width L2 Height H
Dimension range 2 ~ 180 2 ~ 180 0.50 ~ 50
Tolerance 0.01 ~ 0.10 0.01 ~ 0.10 0.01 ~ 0.05
Rectangular window Dimension range 2 ~ 360 2 ~ 320 0.50 ~ 50
Tolerance 0.01 ~ 0.10 0.01 ~ 0.10 0.01 ~ 0.05
Circular window Item Diameter φD Thickness  H
Dimension range φ1  ~ φ400 1 ~ 100
Tolerance 0/-0.01   ~  0/-0.10 +/- 0.01
Polygon window Length L1 Width L2 Height H Edge L3
Dimension range 5~300 5~300 2 ~ 100  
Tolerance ±0.10 ±0.05 ±0.02 ±0.10

Technical criteria

Item Average Precise Ultraprecise
Angle tolerance polygon ±1° ±0.5° ±0.1°
Facial contour (632.8nm) N 5λ 2λ λ/2
Irregularity degree △N 1 1/2 1/4
Surface quality MIL 80/50 40/20 20/10
Surface quality MIL circular 80/50 60/40 40/20
Surface roughness（nm） 1.5~2.5 0.5~1.5 < 0.5
Crystal orientation  deviation ≤5° ≤2° ≤0.5°
Depth of parallelism 15′~  10′ 10′~  1′ 1' ~ 10 "
Crystal orientation C、A、M optional 
Transmittance Under 632.8nm wavelength>85%
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