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IR-cut or AR filter
All cameras have by default an IR-cut (color) or AR (mono) filter mounted on top of the sensor. The user
has however an option to choose from different configurations:
-
IR-cut filter with 650nm filter mounted on top of the sensor
-
Clear glass filter (of the same size as the original IR-cut filter) mounted on top of the sensor.
Check, whether you don't need special lens designed for specifically for use without IR-cut filter
(common lens might not focus properly in the infrared band or show other problems).
-
Daylight blocking filter.
-
Without any sensor cover mounted. This has impact on optical properties of the camera — the C-
mount flange distance from the sensor is accurately adjusted for the use of the IR-cut filterand
removing the filter decreases the length of the optical path. With some lenses and working area
setups it can become impossible to focus properly.
Taverage
≥
92% 420nm 620nm
Tmin
≥
88% 420nm 620nm
T
= 50% 650nm ± 10nm
Taverage
≤
5%
690nm 1100nm
IR cut filter characteristics for color cameras
