19
NED
RCDL2K20CL
UME-0115-02
2.3 Optical Interface
This camera comes with a F-Mount as standard.
1) Quantities of light and the wavelength etc. of a source of light necessary to take the
image for which the customer hopes are different according to the usage. The factor to
decide these contains physical properties, the speed, the spectrum characteristic of
the object taken a picture of, the exposure time, and the characteristic of the source of
light and the specification etc. of the taking system.
It is a luminous exposure (exposure time × quantities of light) that it is important
because an appropriate image is obtained. Please decide the exposure time and
quantities of light after examining which element the customer values enough.
2) Keep these guidelines in mind when setting up your light source:
⚫
LED light sources are relatively inexpensive, provide a uniform field and longer life
span compared to other light sources. However, they also require a camera with
excellent sensitivity.
⚫
Halogen light sources generally provide very little blue light but have high infrared
light (IR) proportions.
⚫
Fiber-optic light distribution systems generally transmit very little blue light relative
to IR.
⚫
Metal halide light sources are very bright but have a shorter life span compared to
other light sources.
3) Generally speaking, the brighter the light sources, the shorter the life span.
CMOS image sensors are sensitive to infrared (IR). We recommend using daylight
color fluorescent lamps that have low IR emissions. If you use a halogen light source,
to prevent infrared from distorting the images use an IR cut off filter that does not
transmit wavelengths.