Laser-Line Polarizing Beamsplitter Cube PBS25-850M
JCOPTIX laser-line polarizing beamsplitter cubes comprise two cemented UV fused silica right-angle prisms, with a wavelength-specific splitting coating on one hypotenuse. Orthogonal linear components are separated: p transmits and s reflects. V-type dielectric coatings on all cube surfaces minimize reflection. A visible dot marks the coated prism. The source instructs entry through the coated hypotenuse to minimize power in the cement. Otherwise, entry through the uncoated prism gives more than three times the fluence in the cement, combining transmission and a double pass of reflection; higher power may degrade it. JCOPTIX offers two sizes and wavelengths of 405 nm, 532 nm, 633 nm, 780 nm, 808 nm, 830 nm, 850 nm, 1030 nm, 1064 nm, and 1550 nm, including versions premounted in 30 mm cage cube mounts. Contact technical support for other wavelengths or sizes.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Optical element material | UV Fused Silica |
| Dimensions | 25.4 mm × 25.4 mm × 25.4 mm |
| Clear Aperture Dimension | >80% of Length and Width |
| Operating Wavelength | 850 nm |
| Extinction ratio (Tp:Ts) | >3,000:1 |
| Coating | Antireflection coating, beamsplitter coating |
| Antireflection Coating R_avg | R_avg< 0.25% |
| Beamsplitter coating Tp / Rs | Tp >95%， Rs >99.5% |
| Exit Angle [Transmission / reflection] | Transmission: 0°±5 arcmin; Reflection: 90°±5 arcmin |
| Damage Threshold [1064 nm, 5 ns, 10 Hz] | 5.5 J/cm² at 1064 nm, 5 ns, 10 Hz |
| Dimensional Tolerance | +0.0/-0.2 mm |
| Transmitted wavefront error [@633 nm] | λ/4 |
| Surface Flatness [@633 nm] | λ/4 |
| Surface quality (scratch/dig) | 20/10 |
| Mechanical housing dimensions | 41 mm × 41 mm × 41 mm |
Key Features
Datasheet
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Supplier Information
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