infrared filter


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infrared filter

A filter that permits passage of only infrared waves of a certain wavelength.
See also: filter
References in periodicals archive ?
The rugged, waterproof unit provides 90 minutes of illumination on a single charge and features a host of options, including an infrared filter for low-light video equipment and to boost night vision and an ultraviolet filter for marking, identification and forensic operations.
McMahon says he is developing an infrared filter that will automatically pick out Lyman-alpha light from even more-distant galaxies.
This DSLR caters to astronomers and hobbyists who enjoy capturing the beauty of the night sky by offering a modified infrared filter and a low-noise sensor with heightened hydrogen-alpha sensitivity.
Its output is a cool light, owing to an infrared filter located between the bulb and the fiber optic bundle.
Digital signal processing circuitry delivers clear video in most lighting environments, and a day/night control uses an infrared filter for excellent images in low light.