Distance measuring system utilizing an object with at least one

Details Distance measuring system utilizing an object with at least one Distance measuring system utilizing an object with at least one

1991-03-19

1992-06-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023116, H01J 314

Patent

active

051226600

ABSTRACT:
A device for measuring a relatively moving distance of two relatively moving objects is disclosed. The device includes a plurality of inclined surfaces formed on one of the objects and arrayed with a predetermined pitch along the relatively moving direction, with each of the inclined surfaces being inclined with respect to the relatively moving direction. A measuring portion is provided on the other object for measuring the distance to at least one of the inclined surfaces in a direction having an angle with respect to the relatively moving direction, and a detecting portion detects the relatively moving distance of the two objects on the basis of the measurement by the measuring portion.

REFERENCES:
patent: 3254227 (1966-05-01), Hock
patent: 3900264 (1975-08-01), Heitmann et al.
patent: 4399358 (1983-08-01), Burkhardt et al.
patent: 4656347 (1987-04-01), Une et al.
patent: 4676645 (1987-06-01), Taniguchi et al.
patent: 4820918 (1989-04-01), Igaki et al.

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