Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-10-29
1987-05-26
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358101, 382 8, 382 67, H04N 718, H04N 700
Patent
active
046689834
ABSTRACT:
An optical inspection system for the inspection of circular workpieces (1) includes an electronic camera (6) having an optical system (21) for focusing an image of a circular workpiece (1) on an electronically active image receiving surface (23), means (16) to move the circular workpiece (1) into a predetermined position in the field of view of the optical system (21) of the camera (6). When a conventional electronic camera is used to inspect circular workpieces it is very difficult to analyze the output signal from the camera since it corresponds to chords taken across the workpiece (1). To overcome this the present inspection system includes means (7) for scanning the image receiving surface in directions extending substantially radially across the image receiving surface to produce an output signal, and a signal analyzer (12) arranged to monitor the output signal corresponding to each radial scan to detect the presence of any irregularity in the workpiece.
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Britton Howard W.
Peng John K.
W. R. Grace & Co.
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