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 angle10.
Angle of incidence, arc grad:
45
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