Unpolarized beamsplitters are useful for natural, incoherent or unpolarized light. It is advised not to use these cubes in polarized optical systems.
The unpolarized beamsplitter cubes consist of a pair of precision right-angle prisms carefully cemented together to minimize wavefront distortion and beam skewing. The hypotenuse of one prism is coated with a multilayer beamsplitter coating tuned to the application. The four outside surfaces of the prism are anti-reflection (AR) coated with”V” type or broadband coatings to minimize surface reflection losses over the specific wavelength range.
For proper functioning, the incoming light should be one of the following:
– natural light
– circularly polarized
– 45° linearly polarized
This means that the s-polarized and p-polarized components should be roughly equal to each other in intensity. The outgoing beams are two partially polarized beams of approximately equal intensities.
| Specification | Available Quality |
|---|---|
| Range of dimensions | 0.8mm-100mm |
| Range of splitting ratios | 10/90 (R/T*) to 90/10 (R/T) |
| Highest accuracy of splitting ratio | ±3% (single wavelength); ±5% (broadband) |
| Highest available surface figure | λ/10 (DIN: 3/0.2) |
| Highest available surface quality | 20-10 S/D (DIN: 5/2×0.06) |
| Wavelength range | single wavelength or broadband |
| Highest available tolerance of beam deviation | 5″ (arcsec) |
*: T=(Ts+Tp)/2, R=(Rs+Rp)/2
We take quality control very seriously: we rely on accurate, widely recognized measurement systems for testing our optics. The following table indicates the accuracy of measurement for the most relevant parameters.
Surface figure: λ/20
Angle: 0,5 arcsec
Radius: 0,01%
Focal length: 0,03%-0,3%
Centration: +/-0,2µm or +/-2 arcsec
Wavelength: +/-0,3nm (190-1100nm)
We are known for:
Over 30 years experience in optics
ISO9001:2015 Certified
from the very first contact
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