Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1983-11-09
1987-01-27
Evans, F. L.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
350 68, G01B 1108
Patent
active
046391410
ABSTRACT:
In an optical measuring device including: a parallel scanning ray beam generator having a rotary mirror for reflecting incident ray beams from a beam generator and converting the same into rotary scanning ray beams and a collimator lens for converting the rotary scanning ray beams into parallel scanning ray beams; and a light receiving element for detecting bright and dark portions of the parallel scanning ray beams which have passed through the workpiece to be measured; whereby a dimension in the scanning direction of the workpiece to be measured is sought from a length of time of a dark portion or a bright portion generated due to the obstruction of part of the parallel scanning ray beams by the workpiece to be measured which is interposed between the parallel scanning ray beam generator and the light receiving element, the incident optical axis of ray beams directly or indirectly emitted from the beam generator to the rotary mirror and an optical axis of the collimator lens for converting the rotary scanning ray beams formed by the aforesaid ray beams and reflected by the rotary mirror into the parallel scanning ray beams cross from directions opposite to each other and at equal angles with respect to a rotary plane perpendicular to a rotary center axis of the rotary mirror.
REFERENCES:
patent: 3853406 (1974-12-01), Zanoni
patent: 4427296 (1984-01-01), Demarest et al.
Hamada Hiroyoshi
Kuwabara Yoshiharu
Evans F. L.
Mitutoyo Mfg. Co. Ltd.
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