Image Space Telecentric Lenses,

Modern CCD and CMOS Cameras use microlens arrays on top of the sensor to improve light efficiency. In front of every pixel a microlens focuses incoming light to the active area of the pixel. The efficiency is improved up to 20 %. But this lens makes the pixel very sensitive to the incidence angle of the light. This creates strong vignetting effects ("shading") at bigger incidence angles. For shading compensation SillOptics presents a new series of image side telecentric lenses. As the incidence angle of this lenses is always close to normal, the shading effect is minimised. Currently three lens types with magnifcation from 1x to 0.01 are available. The focal length is 22 mm for 1/2" CCD , 44 mm for up to 2/3" CCD and 54 mm for sensor types up to 1". All lenses have variable iris, focus and magnification adjustment.

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