

Broadband Polarizing Beamsplitter Cubes, AR Coating: 1200 nm-1600 nm MPBS644
MPBS644Design Tools
View all 49 calculators →Broadband PBS 1200-1600 nm — Model MPBS644
N-SF1, optimized for 1200 nm-1600 nm, cube size 25.4 mm×25.4 mm×25.4 mm, extinction ratio >1000:1.
Overview
LBTEK mounts the 25.4 mm broadband polarizing beamsplitter cube (AR coating: 1200nm-1600nm) inside a cubic housing compatible with 30 mm cage systems. A scribe line on the top face marks the beam direction. M3 threaded holes on the side allow direct compatibility with 30 mm cage systems. Four SM1 internal-thread ports accept 25.4 mm lens tubes. M4 threaded holes at the base support post mounting.
Key Features
- Extinction ratio (Tp:Ts) >1000:1
- Spectroscopic film: Tp>90%, Rs,avg >95%
- AR coating: Ravg<0.5% (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: N-SF1
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 | N-SF1 |
| Size | 25.4 mm×25.4 mm×25.4 mm |
| Dimensional tolerance | ±0.25 mm |
| Clear Aperture | 80% CA |
| Operating Wavelength | 1200 nm-1600 nm |
| Coating | AR coating + beamsplitter film |
| Anti-reflective coating | Ravg<0.5% (6°angle of incidence, per surface) |
| Spectroscopic film | Tp>90%, Rs,avg >95% |
| Extinction ratio (Tp:Ts) | >1000:1 |
| 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; |





