Inspection apparatus

Details Inspection apparatus Inspection apparatus

1977-11-21

1979-10-30

Corbin, John K.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250563, 356446, G01N 2116

Patent

active

041726669

ABSTRACT:
To distinguish between different types of fault detected by laser scanning of a moving web two or more detectors are arranged to collect light reflected in different ranges of angles in direction of web motion. By combining outputs of these in a logical way representing increases or decreases in the sums and differences of the signals they produce, the faults can be classified as absorbing, scattering, or their opposites, or deflecting.

REFERENCES:
patent: 3176306 (1965-03-01), Burns
patent: 3922093 (1975-11-01), Dandliker et al.
patent: 3984189 (1976-10-01), Seki et al.

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