
Laser Line Polarizing Beamsplitter Cubes PBS22-780
PBS22-780Design Tools
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Laser Line PBS — Model PBS22-780
UV Fused Silica, optimized for 780 nm, cube size 12.7 mm×12.7 mm×12.7 mm, extinction ratio >3000:1.
Overview
LBTEK offers 10 design wavelengths (405, 532, 633, 780, 808, 830, 850, 1030, 1064 and 1550 nm). On a polarizing beamsplitter cube, the prism marked with a black dot on its top face indicates the hypotenuse coated with a dielectric polarizing beamsplitter film. This dielectric beamsplitter film reflects S-polarized light and transmits P-polarized light. Any of the four side faces can serve as the input surface. For optimal polarization performance, the input beam should enter at normal incidence on the right-angle face of the prism whose hypotenuse carries the polarizing beamsplitter film.
Key Features
- Extinction ratio (Tp:Ts) >3000:1
- Spectroscopic film: Tp>95%, Rs>99.5%
- AR coating: Ravg<0.25% (6°angle of incidence, per surface)
- Optical coatings: AR coating + beamsplitter film
- Transmitted wavefront error: λ/4
- Surface quality: 40/20
- Beam deviation: transmission: 0°± 5 arcmin; reflection: 90°± 5 arcmin;
- Substrate: UV Fused Silica
Applications
- Laser polarization control and beam separation
- Interferometry and polarimetry setups
- Optical isolators and magneto-optic modulators
- Polarization-sensitive imaging and spectroscopy
- High-contrast laser systems requiring stable extinction
| Optical component material | UV Fused Silica |
| Size | 12.7 mm×12.7 mm×12.7 mm |
| Dimensional tolerance | +0.0/-0.2 mm |
| Clear Aperture | 80% CA |
| Operating Wavelength | 780 nm |
| Coating | AR coating + beamsplitter film |
| Extinction ratio (Tp:Ts) | >3000:1 |
| Surface finish (scratches/pits) | 40/20 |
| Transmitted Wavefront Error (TWE) (@633 nm) | λ/4 |
| Surface Flatness (@633 nm) | λ/4 |
| Exit angle | transmission: 0°± 5 arcmin; reflection: 90°± 5 arcmin; |





