Sharp cut filters attenuate unwanted spectral regions
These filters have an edge transmission coating on the front surface. A long pass filter coating reflects shorter wavelengths and transmits longer wavelengths. A short pass filter coating reflects longer wavelengths and transmits shorter wavelengths. The rear surface is coated with a broadband anti-reflection coating. The coatings are intended for use at normal incidence but these filters can be produced for use at 45° on special request.
| Substrate Material: |
|
| Surface Flatness: | <2 λ / inch |
| Surface Quality: | <60 / 40 |
| Wedge: | < 3 arc min |
| Cut-on (cut-off) wavelength: | 50% of peak transmittance |
| Cut-on (cut-off) Accuracy: | ± 3% of wavelength |
| Dimensions: |
|
| Clear Aperture: | > 85% of dimensions |
| Reflectance: | R > 99.5% |
| Transmission: | T > 85%, below 400 nm T > 75% |
| Coating: | BBAR on second side |
Long / Short Wave Pass Filters (LWP / SWP)
| Product Type | Long Wave Pass Filter, Short Wave Pass Filter |
|---|---|
| Dimension | "1.0" dia x 1.5mm t, 2.0" dia x 1.5mm t |
| Material | BK7 Grade A, UV Grade Fused Silica |
| Cut on (Cut off) Wavelength | 400 nm, 450 nm, 500 nm, 550 nm, 600 nm, 650 nm, 700 nm, 750 nm, 800 nm, 850 nm, 900 nm, 950 nm, 1000 nm |
Color Separation Filters 
