Contact image sensor

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Pacer has introduced a colour contact image sensor (CIS) from Tichawa Vision, which promises large reading width, high resolution and scan speeds. The rugged, industrial-grade sensor has applications within process and quality inspection for the paper, print and industrial sectors. The scanning width of 530mm is provided by two sensor boards joined end to end. With line rates of up to 40kHz representing a maximum scan speed of 300m/min at a high spatial resolution of 200dpi, productivity and inspection or capture quality is significantly improved and the process speed maximised.

Utilising standard camera link connectivity to frame-grabber chip and having integrated white lighting and optics, the CIS is easy to use as part of PC-based industrial process equipment. Maintenance is decreased and downtime minimised by the provision of a simple alignment mechanism. Pixel binning is employed to reduce read and systemic noise, giving the effective resolution of 200dpi and flat field correction is employed to normalise pixel sensitivity. There are three detectors (red, green and blue) per pixel and 4,222 of these ‘colour’ pixels. The optimal working distance for the detector is 10mm.

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