Daylight filter

nomenclature

With regard to light (and related electromagnetic radiation ), the word before "filter" typically indicates what is allowed through by the filter, a daylight filter is therefore a filter that allows daylight (light in the visible wavelength range) to pass through other wavelengths (such as infrared light ) However not.

Sense and purpose

Chemical film, as well as CMOS and CCD sensors, are also sensitive in wavelength ranges in which the human eye has practically no sensitivity, which can alienate recordings. That is why many cameras, camcorders etc. have daylight filters in order to approximate their spectral sensitivity to the human eye. Some camcorders have a so-called night shot mode in which the filter is swiveled out of the beam path. In addition, the scene can possibly be "illuminated" with one or more infrared light-emitting diodes without e.g. B. to disturb wild animals at night, as they usually cannot see the IR light either.

See also : infrared filter

Sometimes filters are also referred to as daylight filters, which serve to approximate the spectrum of an artificial light source to the spectrum of the sun in bright days; for this purpose, the light in the red area is weakened, but not in the blue area, as daylight typically has a slight bluish cast, in contrast to artificial light, which is rather reddish.