Optical movement measuring method and apparatus using interferen

Details Optical movement measuring method and apparatus using interferen Optical movement measuring method and apparatus using interferen

1992-08-21

1994-10-11

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

250237G, G01B 902

Patent

active

053552202

ABSTRACT:
An optical movement measuring method and apparatus measures a movement of an object. A light from a light source is irradiated on a diffraction grating which is provided on the object so as to generate diffracted lights of different order of diffraction. The diffraction grating has light transmitting portions and light blocking portions which are alternately and periodically arranged. Interference fringes which comprises bright and dark stripes which occur alternately and are generated by overlapping spots of diffracted lights of different order of diffraction are detected, and a movement of the object is measured based on a counted number of stripes of the detected interference fringes.

REFERENCES:
patent: 3419330 (1968-12-01), Schneider
patent: 3726595 (1973-04-01), Matsumoto
patent: 4218615 (1980-08-01), Zinn, Jr.
patent: 4395124 (1983-07-01), Remijan
patent: 4823001 (1989-04-01), Kobayashi et al.
patent: 4912322 (1990-03-01), Ichikawa
Akedo et al., "Point Source Diffraction and its Use in an Encoder", Applied Optics, vol. 27, No. 22, Nov. 15, 1988.
Akedo et al., "Studying of a Laser Encoder by Using a Point Source Diffraction", Material of the 8th Meeting of the Society for the Study of Robot Engineering, Mar. 3, 1989.
Akedo et al., "Formation of a Diffractional Grating by Magnetic Lithograph", Nippon Oyo Jiki Gakkaishi, vol. 13, No. 2, 1989.

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