Midwest Optical SP645 Near-IR/MId-Red Dichroic Block Shortpass Filter, 400-640nm Range
Our most popular near-IR blocking filter for inside-the-camera applications. Also referred to as an infrared cut filter, these filters limit the amount of infrared radiation that reaches delicate CCD and CMOS sensors. Near-IR blocking is unusually exceptional in the case of these filters. CCD/CMOS imagers are very sensitive to infrared radiation and, often, deep red wavelengths as well. Using a SP645 filter will reduce or prevent a reddish, washed out coloring of the final image. These filters are 1mm thick.
- Useful Range : 400-640nm
- Cut-off Wavelength 50% T : 645nm
- Tolerance : +/- 10nm
- Peak Transmission : ≥90%
- Surface Quality : 40/20