The 20B20BS.3 Broadband Dielectric Beamsplitter is made of BK7 glass, 50.8 mm in diameter, 9.4 mm thick, with a surface flatness of λ/10, and coated for 1290-1580 nm. Our broadband dielectric beamsplitters are designed to provide general purpose laser beamsplitting and combining for visible through near infrared applications. Each coating is essentially achromatic across a wide spectral band so that a single optic will work for the entire range of a particular tunable laser, for several laser diode wavelengths, or for most visible laser wavelengths.
| Model | 20B20BS.3 |
|---|---|
| Shape | Round |
| Type | Beamsplitter |
| Material | Grade A BK7 |
| Diameter | 2.0 in. (50.8 mm) |
| Thickness | 0.37 in. (9.4 mm) |
| Surface Quality | 15-5 scratch-dig |
| Angle of Incidence | 45 ° |
| Antireflection Coating | 1290-1580 (BS.3) |
| Diameter Tolerance | +0/-0.13 mm |
| Thickness Tolerance | ±0.38 mm |
| Wavelength Range | 1290 to 1580 nm |
| Wedge | 30 ±15 arc min |
| Efficiency | Ravg < 0.75% @ 1010-1550 nm |
| Chamfers | 0.38-1.14 mm face width |
| Chamfers Angle/Tolerance | 45° ±15° |
| Clear Aperture | > central 80% of diameter |
| Damage Threshold | 500 W/cm2 CW, 0.5 J/cm2 with 10 nsec pulses, typical |
| Durability | MIL-C-675C, moderate abrasion million cycles |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended see Care and Cleaning of Optics |
