Features of dielectric Brewster polarizers:
Two polarized beams
Lower polarization purity compared to common systems
The Brewster angle design results in a relatively good polarization purity (typically 200:1) at low cost. Since the transmitted p-polarization is not reflected from the glass surface, an anti-reflection coating on the back side is not required.
Dielectric Brewster polarizers are high damage threshold, economical polarizers, typically used for Q-switching.
When using thin film polarizers, the lateral offset of the transmitted beam must be taken into account. This depends on the thickness of the substrate. They function for one wavelength only.
| Specification | Available Quality |
|---|---|
| Range of dimensions | 2mm – 75mm |
| Highest available surface figure | λ/10 (DIN: 3/0.2) |
| Highest available surface quality | 20-10 S/D (DIN: 5/2×0.1) |
| Highest available tolerance of beam deviation | 3″ (arcsec) |
| Highest available extinction ratio | 200:1 |
| High power version for single wavelengths | ~10 J/cm² at 1064nm for 10nsec pulse |
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)
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