Optical inspection systems

Details Optical inspection systems Optical inspection systems

1976-07-23

1978-07-11

Corbin, John K.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

250572, G01N 2132

Patent

active

040998843

ABSTRACT:
A non-contacting optical inspection system for detecting blemishes in sheet material, of the kind in which light directed onto the sheet as it flows past an inspection head is reflected onto photosensitive detectors, is provided with means for varying the relative sensitivities of the system to optical defects, such as spots, and mechanical defects, such as lumps or creases, so that the system can be adjusted to be equally sensitive to both types of defect. The inspection head containing lamp, photosensitive detectors and a collimating system including apertures through which reflected light is transmitted to the detectors, is so mounted that it can be raised and lowered and also rotated about a horizontal axis to enable the angle of incidence of light on the sheet material to be varied while maintaining the distance of the aperture from the sheet substantially constant.

REFERENCES:
patent: 3105152 (1963-09-01), Nash
patent: 3666370 (1972-05-01), Seaholtz
patent: 3827809 (1974-08-01), Nash
patent: 3841761 (1974-10-01), Selgin

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