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格兰-汤普森偏振器由从最好的光学级方解石或α-BBO材料做的两个胶合棱镜. 它在保持高消光比的同时, 提供了比任何其他偏光器都要广泛的视场角. 这种偏振器标准的长度孔径比为2.5:1时全接收锥角超过15°@589nm, 对称于中心轴. 更长的偏振器长度孔径比为3:1时视场角超过26°.
格兰-汤普森偏振器规格:
|
材料 |
a-BBO, Calcite |
|
波长范围 |
a-BBO: 200-1100nm; Calcite: 350-2300nm; |
|
消光比 |
Calcite:<5x10 -5 ; a -BBO:<5x10 -6 |
|
表面质量 |
20/10 scratch/dig |
|
光束偏移 |
< 3 arc minutes |
|
波前畸变 |
λ/4@632.8nm |
|
损伤阈值 |
>200MW/cm2 |
|
镀膜 |
Single Layer MgF2 |
|
外壳 |
Black Anodized Aluminium |
1. a-BBO格兰-汤普森偏振器
|
Part No. |
Aperture φa (mm) |
O.D. φd (mm) |
L (mm) |
L/A Ratio |
Wavelength Range |
Extinction Ratio |
Angular Field |
|
GMB06 |
6.0 |
15.0 |
22.0 |
1.6 |
200-1100nm |
<5x10-6 |
>15.0° |
|
GMB08 |
8.0 |
25.4 |
28.0 |
||||
|
GMB10 |
10.0 |
25.4 |
33.0 |
||||
|
GMB12 |
12.7 |
25.4 |
39.0 |
||||
|
GMB15 |
15.0 |
30.0 |
45.5 |
2. Calcite格兰-汤普森偏振器
|
Part No. |
Aperture φa (mm) |
O.D. φd (mm) |
L (mm) |
L/A Ratio |
Angular Field |
Extinction Ratio |
Wavelength Range |
|
GMC06A |
6.0 |
15.0 |
22.0 |
2.5 |
14° ~ 16° |
<5x10-5 |
350-2300nm |
|
GMC08A |
8.0 |
25.4 |
28.0 |
||||
|
GMC10A |
10.0 |
25.4 |
33.0 |
||||
|
GMC12A |
12.7 |
25.4 |
39.0 |
||||
|
GMC15A |
15.0 |
30.0 |
45.5 |
||||
|
GMC06B |
6.0 |
15.0 |
26.0 |
3.0 |
25° ~ 28° |
||
|
GMC08B |
8.0 |
25.4 |
32.0 |
||||
|
GMC10B |
10.0 |
25.4 |
38.0 |
||||
|
GMC12B |
12.7 |
25.4 |
46.0 |
||||
|
GMC15B |
15.0 |
30.0 |
53.0 |
|
双折射晶体材料特性 |
a-BBO Crystal│YVO4 Crystal│Calcite Crystal│Quartz Crystal│MgF2 Crystal