Cheetah Pregius Camera with Camera Link
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User Manual
July 6, 2018
Page
48
of
64
Rev 1.1
Figure 34: Color relative response to IMX252 sensor.
4.9 Micro-polarized Camera
Light travels in electromagnetic waves that vibrate in multiple, random directions. When
these unpolarized light waves strike certain surfaces, they tend to reflect or refract light
and obscure the imaging target. A polarizer filter integrated into the camera can block
certain light waves from reaching the image sensor and thereby improve image quality.
The Sony IMX-250MZR image sensor in the Cheetah C2420Z camera includes a micro-
polarizer filter that blocks light waves based on a polarization angle. The filter consists of
an array of four polarizers grouped in a 2x2 sub-array. As shown in the following
illustration, each array covers a block of four pixels in the sensor with each polarizer
absorbing light at one of four angles -- 90 degrees, 45 degrees, 135 degrees, or 0 degrees.
Figure 35: The C2420Z camera micro-polarizer blocks image obscuring
light waves from reaching the sensor.