Optical micrometer

Details Optical micrometer Optical micrometer

1979-11-01

1985-01-08

Punter, William H.

Optics: measuring and testing

By configuration comparison

With photosensitive film or plate

356387, G01B 1102, G01B 1108, G01B 1110

Patent

active

044924739

ABSTRACT:
An optical micrometer and position detector has a rotating mirror driven by a motor which deflects a coherent light beam toward a collimating lens for directing parallel light beams at an object to be measured. A photoelectric detector determines portions of the parallel beams which are blocked by the object and provides a pulse signal from which a dimension or position gap signal is generated and displayed. The rotating mirror is mounted on a shaft for corotation with a cylindrical encoder for generation of electric signals proportional to the angular velocity of the mirror and which controls a voltage controlled oscillator having an output which is combined with the dimension or position gap signal for display. The displayed signal is thus automatically corrected for minimization of external and/or internal mechanical influences on the angular velocity of the mirror.

REFERENCES:
patent: 3448402 (1969-06-01), Booker, Jr. et al.
patent: 3533701 (1970-10-01), Hruby et al.
patent: 3765774 (1973-10-01), Petrohilos
patent: 3905705 (1975-09-01), Petrohilos
patent: 3997269 (1976-12-01), Moulton

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