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Beamsplitters
 Beamsplitters allow a certain percentage of incident energy to be reflected while transmitting the remainder. In most cases, beamsplitters are angle, wavelength and polarization sensitive.
Specifications: | 1. | Material: | CVD-ZnSe | | 2. | Diameter tolerance, mm: | +0.0 / -0.1 | | 3. | Thickness tolerance, mm: | +/- 0.25 | | 4. | Parallelism, arc min: | <= 3 | | 5. | Clear aperture: | 90% of diameter | | 6. | Surface quality, scr/dig: | 40/20 | | 7. | Surface figure (power-irregularity)
@ 633 nm, fringe: |
1 - 1/2 | | 8. | Side 1: Reflectivity tolerance
@ 10.6 µm, %: 1% - 5% | +/- 0.5 x R | | | 6% - 85% | +/- 7 | | | 86% - 93% | +/- 5 | | | 94% - 99.5% | +/- 0.5 | | 9. | Side 2: AR Coating reflectivity
per surface @ 10.6 µm: | Typicaly < 1%,
varies with polarisation and incidence angle | | 10. | Angle of incidence, arc grad: | 45 |
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Maximal diameter – 50.8 mm.
Standard sizes:
| Diameter |
Thickness |
| inches |
mm |
inches |
mm |
0.375
|
9.52
|
0.080
|
2.0
|
0.50
|
12.7
|
0.080 |
2.0
|
0.75
|
19.1
|
0.080
|
2.0
|
1.00
|
25.4
|
0.080 |
2.0
|
1.00
|
25.4
|
0.120
|
3.0
|
1.10
|
27.9
|
0.120
|
3.0
|
1.50
|
38.1
|
0.120
|
3.0
|
2.00
|
50.8
|
0.200
|
5.1
|
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