Opposite-sides object inspection system

Details Opposite-sides object inspection system Opposite-sides object inspection system

1976-03-17

1977-05-24

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

353 28, 356199, 356237, G01B 1100

Patent

active

040251985

ABSTRACT:
An inspection system including apparatus for projecting onto a portion of one side of an object in a viewing station a positionally aligned, unidirectionally reversed image of the corresponding portion of the opposite side of the object. The system is especially useful in noting from one side of an object the total lateral span of a defect, such as a knot in a piece of lumber, which may extend completely through the object.

REFERENCES:
patent: 3776643 (1973-12-01), Titoff
patent: 3836261 (1974-09-01), Clarke
patent: 3964191 (1976-06-01), Sieber et al.

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