A short-wave pass (SWP) filter transmits short-wavelength light while blocking longer wavelengths beyond its cutoff point. It features a broad cutoff bandwidth, deep blocking (high optical density), steep transition from transmission to blocking, and high in-band transmission efficiency. SWP filters are widely used in imaging optical systems, biometric identification, dashcams, microscopes, industrial cameras, optical instrumentation, and machine vision inspection—effectively eliminating out-of-band stray light to significantly enhance image clarity and system sensitivity.
Our SWP filters deliver high transmission efficiency, accurate color reproduction, low signal-to-noise ratio, and robust, durable coatings—enabling comprehensive custom filter solutions.
| Cutoff Wavelength | 400-1300nm |
| Cutoff Range | 300-1650nm |
| Optical Density (OD) | OD3; OD4; OD5; OD6 |
| Dimensional Tolerance | 0.5-600±0.02mm |
| Clear Aperture | ≥90% |
| Thickness Tolerance | 0.3-50±0.02mm |
| Surface Flatness | 1/10Lambda |
| Surface Quality | 10-5 |
| Edge Bevel | 45°×0.2mm |
| Coating Type | Hard-coated |
