Optical apparatus

Details Optical apparatus Optical apparatus

1976-07-15

1978-04-18

Tokar, M.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350299, G02B 514

Patent

active

040853225

ABSTRACT:
Optical apparatus for determining the angle at which light is reflected by a surface being scanned by light spot, wherein in the area of the light beams emanating from the surface is provided a lamellar stepped mirror arrangement which extends in the scanning direction and whose individual planar mirrors are arranged parallel to one another and deflect the light which strikes them to an optical system on whose focal plane is arranged a photo detector array extending at right angles to the optical axis.
A particular application occurs in conjunction with monitoring webs of fabric or paper for surface irregularities faults or errors.

REFERENCES:
patent: 2946253 (1960-07-01), Clark, Jr.
patent: 3322032 (1967-05-01), Leach
patent: 3884217 (1975-05-01), Wartes

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