The 10B20NP.22 Laser Line Non-Polarizing Beamsplitter is insensitive to the polarization of an incoming beam. Unlike broadband dielectric beamsplitters, which are extremely polarization sensitive, this beamsplitter provides a true 50/50 split regardless of the incoming polarization. The polarization components are matched to within 5%. Near zero absorption in these dielectric beamsplitters results in true 50/50 split of the beam and high damage threshold. They are especially useful for higher power applications where cemented cube beamsplitters may fail. This 25.4 mm diameter beamsplitter is manufactured using a high-precision BK 7 substrate to minimize wavefront distortion. A slight wedge in the substrate helps eliminate back reflections to the laser. The front surface is coated with a multilayer all-dielectric non-polarizing beamsplitter coating optimized for 488 nm. The back surface is coated with a multilayer dielectric antireflection coating to minimize surface reflection losses and eliminate ghost images.
Технические характеристики
- Wavelength Range 488 nm
- Diameter 25.4 mm
- Material Grade A N-BK7
- Coating Code NP.22
- Antireflection Coating R
- Angle of Incidence 45°±3°
- Orientation Beam should enter surface marked with an arrow
- Reflection 50 ±5%, independent of polarization
- Transmission 50 ±5%, independent of polarization
- Polarization S- and P-polarization components matched to within 5%
- Wavefront Distortion &le,&lambda,/10 at 632.8 nm over the clear aperture
- Damage Threshold 500 W/cm2 CW, 0.5 J/cm2 for 10 ns 1064 nm pulses, typical
- Surface Flatness &le,&lambda,/10 at 632.8 nm over the clear aperture
- Surface Quality 15-5 scratch-dig
- Diameter Tolerance +0/-0.13 mm
- Thickness 6.1 mm
- Thickness Tolerance ±0.38 mm
- Wedge 30 ±15 arc min
- Clear Aperture > central 80% of diameter
- Chamfers 0.5 mm face width
- Chamfers Angle Tolerance 45° ±15°
- Durability MIL-C-675C, moderate abrasion million cycles
- Cleaning See How to Clean Optics
