Top-Quality Edge Filter Prototypes and Products
Edge filters are designed to divide a spectral band of interest into two narrower bands: one transmitted and one reflected or absorbed. The transition between these bands, defining the 'edge' of the optical filter, is typically set at either the 5% (absolute) or 50% (relative) transmission wavelength.
Filters that transmit wavelengths shorter than the edge are known as shortpass (SP) optical filters, while those transmitting wavelengths longer than the edge are termed longpass (LP) optical filters. These filters can be used independently or in combination to create a broader spectral band (using two filters of the same type) or to establish a passband within a selected spectral range (combining shortpass and longpass filters).
We offer custom prototypes and volume production to meet your specific needs.
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Long and Short Pass Filters Specifications
| Typical Specification | Long Pass Filter | Short Pass Filter |
| Dimension | 4 mm ~ 80 mm, round or square | |
| Substrate Material | Borofloat, BK7, Fused Silica, Sapphire etc. | |
| Cut on / off Wavelength(△λ at 50% of Peak) | 340 nm ~ 1570 nm | 340 nm ~ 1570 nm |
| Tolerance | <±10 nm | <±10 nm |
| Transmission | >90% | >90% |
| Rejection | >OD4 | >OD4 |
| Clear Aperture (CA) | >80% | >80% |
Specifications
| Edge Filter Coating Types: | Shortwave Pass (SWP) and Longwave Pass (LWP) |
| Size: | Per your request |
| Transmission: | High In-Band |
| Slope: | Sharp Cut-On and Cut-Off |
Applications
