Two polarized beams
Lower polarization purity compared to common polarizers
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.
These 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. Thin film polarizers function for one wavelength only.
|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|