BN940 Narrow Near-IR Bandpass filters feature a narrow band design with improved blocking of unwanted light and greater insensitivity to short shifting, making them particularly essential when 940 nm lighting is used together with a short focal length camera lens.
940 nm LEDs are commonly used in remote control devices and in security/surveillance lighting. 940 nm illumination is often considered “covert”, as little if any faint red glow is produced from these LEDs, even in complete darkness. Unfortunately CMOS and CCD cameras have greatly reduced sensitivity at these wavelengths, and strong ambient light can often make imaging in the range very difficult.
- Useful Range: 928 to 955 nm
- FWHM: 55 nm
- Tolerance: +/- 7 nm
- Minimum Peak Transmission: >90%
- Surface Quality: 40/20
- Compatible LED: 940 nm