Linear Variable Filters
Linear Variable Filters
A linear variable filters is an optical filter used in many feilds. The transmission spectrum can be continuously varied by changing the position of the light incident on the filter.
Applications: image sensors, gas analysis, earth observation, etc…
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Linear variable bandpass filter
SWIR-LVF900-1800 (FWHM=20-35 nm)
| Center wavelength[nm] | 900 – 1800 |
| Transmittance |
T≧90% @1350 nm |
| FWHM [nm] | 27 ± 2 @1350 nm |
| Rejection Range [nm] | 700 – 2500 |
| Rejection | Tavg.≦1% |
| Linearity | 17 ± 5 nm/mm |
| Angle of Incidence [degrees] | 0 |
| Length [mm] | 76 |
| Width [mm] | 8 |
| Filter thickness [mm] |
2 |
| Spot diameter [mm] | φ1 |
VIS-LVF400-700 (FWHM=6-19 nm)
| Center wavelength[nm] | 400 – 700 |
| Transmittance |
T≧90% @550 nm |
| FWHM [nm] | 11 ± 2 @550 nm |
| Rejection Range [nm] | 300 – 850 |
| Rejection | Tavg.≦1% |
| Linearity | 7 ± 3 nm/mm |
| Angle of Incidence [degrees] | 0 |
| Length [mm] | 76 |
| Width [mm] | 8 |
| Filter thickness [mm] |
2 |
| Spot diameter [mm] | φ1 |