Optical detection apparatus

Details Optical detection apparatus Optical detection apparatus

G - Physics

01

B

354/57, 340/123.

G01B 11/00 (2006.01) B27G 1/00 (2006.01) G01N 21/89 (2006.01) G01N 33/46 (2006.01)

Patent

CA 1047620

ABSTRACT OF THE DISCLOSURE Apparatus for detecting knots and the like in sawn or planed timber comprising means for injecting light into the surface of the timber and means for detecting light emerging from the timber at a location spaced apart from the point or region of injection, a defect such as a knot in the timber, being indicated in dependence upon the amplitude or presence of the light emerging from the timber.

218094

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