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Bluebean Optical manufactures precision Germanium optical components, which are widely used for infrared applications. Its useful transmission range is from 1.8um m to 17um m. Due to wide transmission range and opaque in visible, Ge is well suited for manufacturing of optical components for IR applications in lasers and optical systems. Its high index of refraction (greater than 4) makes it of particular interest for lens design. Germanium components are used with AR coatings because of high surface reflectivity of substrate.
Germanium Characteristics & Transmission Curve 
Germanium Windows Specifications:
|
Material |
Germanium |
|
Dimension Tolerance |
+0.0/-0.1mm |
|
Thickness Tolerance |
±0.1mm |
|
Surface Accuracy |
λ/4@632.8nm |
|
Surface Quality |
60-40 |
|
Parallelism |
<1' |
|
Clear Aperture |
>90% |
|
Bevel |
<0.2x45° |
|
Coating |
upon request |
Germanium Round Windows:
|
Part No. |
Dia(mm) |
T(mm) |
|
RWG00602 |
6.00 |
2.00 |
|
RWG01003 |
10.00 |
3.00 |
|
RWG01203 |
12.70 |
3.00 |
|
RWG01503 |
15.00 |
3.00 |
|
RWG02503 |
25.40 |
3.00 |
|
RWG03005 |
30.00 |
5.00 |
|
RWG03805 |
38.10 |
5.00 |
|
RWG05005 |
50.80 |
5.00 |
Germanium Square Windows:
|
Part No. |
H(mm) |
L(mm) |
T(mm) |
|
SWG01003 |
10.00 |
10.00 |
3.00 |
|
SWG01203 |
12.70 |
12.70 |
3.00 |
|
SWG01503 |
15.00 |
15.00 |
3.00 |
|
SWG02003 |
20.00 |
20.00 |
3.00 |
|
SWG02503 |
25.40 |
25.40 |
3.00 |
|
SWG03005 |
30.00 |
30.00 |
5.00 |
|
SWG03805 |
38.10 |
38.10 |
5.00 |
Ge Lenses Specifications:
|
Material |
Germanium |
|
Design Wavelength |
10.6μm |
|
Focal Length Tolerance |
±1% |
|
Diameter Tolerance |
+0.0/-0.1mm |
|
Thickness Tolerance |
±0.2mm |
|
Surface Accuracy |
λ/2@632.8nm |
|
Surface Quality |
60-40 |
|
Centration |
<3' |
|
Clear Aperture |
>80% |
|
Bevel |
<0.2x45° |
|
Coating |
AR Coating @ 8-12μm |
Germanium Plano-Convex Spherical Lenses:
|
Part No. |
Dia |
EFL |
R |
Tc |
Te |
BFL |
|
PCXG12015 |
12.70 |
15.00 |
45.04 |
2.50 |
2.00 |
14.38 |
|
PCXG12020 |
12.70 |
20.00 |
60.06 |
2.30 |
2.00 |
19.43 |
|
PCXG12040 |
12.70 |
40.00 |
120.11 |
2.20 |
2.00 |
39.45 |
|
PCXG25025 |
25.40 |
25.40 |
76.27 |
3.10 |
2.00 |
24.63 |
|
PCXG25050 |
25.40 |
50.00 |
150.14 |
4.00 |
3.50 |
49.00 |
|
PCXG25075 |
25.40 |
75.00 |
225.21 |
4.00 |
3.60 |
74.00 |
|
PCXG25100 |
25.40 |
100.00 |
300.28 |
4.00 |
3.70 |
99.00 |
|
PCXG25150 |
25.40 |
150.00 |
450.42 |
4.00 |
3.80 |
149.00 |
|
PCXG25200 |
25.40 |
200.00 |
600.56 |
4.00 |
3.90 |
199.00 |
|
PCXG25500 |
25.40 |
500.00 |
1501.39 |
2.10 |
2.00 |
499.48 |
|
PCXG25750 |
25.40 |
750.00 |
2252.09 |
2.00 |
2.00 |
749.50 |
|
PCXG25101 |
25.40 |
1000.00 |
3002.79 |
2.00 |
2.00 |
999.50 |