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Beam splitters are used to split or combine beam or
light. Glass perfection can provide two types of beam splitters:
plates and cubes.
Beamsplitter Plates:
This plate can be used with a high power laser. a thin
film coating on the front surface of a beamsplitter
changes the reflectance from that surface. we can fabricate
it from BKY, MgF2etc. Also this beamsplitter includes
narrow and broad band plates.
Specifications:
| Material: |
Optical Quality BK7 Grade |
| Dimension Tolerance: |
+- 0.2mm |
| Thickness Tolerance: |
+- 0.2mm |
| Surface Quality: |
60-40 scratch and dig |
| Flatness: |
^/4 @ 632.8 nm per 25 mm |
| Parallelism: |
1 arc minute |
| T/R: |
50/50 |
| Beam Diviation: |
60-40 scratch and dig |
| Wavefront Distortion: |
3 arc minutes |
| Extinction ratio for transmitted beams: |
<^/4 @ 632.8nm |
| Principal Transmittance: |
>100:1 |
| Principal Reflectance: |
Tp>98% and Ts<0.5% |
| Coating: |
Rs>99.5% and Rp<2% |
| Polarisation Beamsplitter Coating: |
On hypotenuse AR coating per face for faces |
Beamsplitter Cube:
Our beamsplitter cubes are made from two BKY glass
right angle prisms cemented together at the hypotenuse.
They do not exhibit ghost reflections nor do they displace
the transmitted beam, as plate beamsplitters do. They
are optimised for a specific wavelength, or narrow wavelength
range.
 |
T = (Ts + Tp) / 2
R = (Rs + Rp) / 2 |
Specifications:
| Material: |
Optical Quality BK7 Grade |
| Dimension Tolerance: |
+- 0.2mm |
| Surface Quality: |
60-40 scratch and dig |
| Beam Deviation: |
3 arc minutes |
| Flatness: |
<^/4 @ 632.8nm |
| T/R: |
50/50 +- 2% |
Coating:
Partial reflectance coating on hypotenuse AR coating
per face for faces. |
