Reflected light scanning method and apparatus for the detection

Details Reflected light scanning method and apparatus for the detection Reflected light scanning method and apparatus for the detection

1988-04-13

1990-04-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356445, G01N 2186

Patent

active

049183214

ABSTRACT:
In a method for the detection of blemishes on the surface of an object, e.g. for the detection of blemishes in the paintwork on the surface of a motor vehicle body, a strip of light is produced on the surface by means of a lighting system, and this strip of light is moved over the surface by relative movement between the lighting system and the surface; strip-like sections of the surface of the object are in each case recorded stepwise in the region of the strip of light, the step size of successive recordings being smaller than the width of the strip of light. In an apparatus for carrying out this method, the lighting system comprises at least one lighting unit with a light exit window, and the recording system comprises at least one sensor unit with a light entry window, the light exit window and the light entry window being arranged closely adjacent.

REFERENCES:
patent: 3800148 (1974-03-01), DeCock
patent: 4260899 (1981-04-01), Baker
patent: 4528455 (1985-07-01), Loose
patent: 4549206 (1985-10-01), Suzuki et al.
patent: 4563095 (1986-01-01), Puffer

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