Method and means for optical inspection of the interior surface

Details Method and means for optical inspection of the interior surface Method and means for optical inspection of the interior surface

1979-10-19

1982-03-02

Corbin, John K.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

G01N 2188

Patent

active

043176321

ABSTRACT:
The interior surface of a pipe is optically inspected by a scanner including an array of photodiodes, a light source, and mirrors for directing light reflected from the interior surface to the photodiode array. The charges developed by the photodiodes are converted to digital data which is subtracted from a reference signal for an unblemished interior surface area. The difference is recorded in a memory and displayed on a monitor for defect analysis.

REFERENCES:
patent: 2987960 (1961-06-01), Sheldon
patent: 3637314 (1972-01-01), Groot

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