Position detecting device having a line sensor whose length is s

Details Position detecting device having a line sensor whose length is s Position detecting device having a line sensor whose length is s

1996-11-19

1998-11-17

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023116, 341 13, G01D 534

Patent

active

058379991

ABSTRACT:
In an apparatus for detecting a movement of an encoding member capable of generating simultaneously two light beams which are spaced with a predetermined distance therebetween and which move in synchronization with the movement of the encoding member, a line sensor faces the encoding member such that the two light beams move alternately on the line sensor. The line sensor has a length shorter than the distance between the two light beams so that the line sensor receives a single light beam and outputs position information corresponding to a moving position of the received light beam on the line sensor. A detector detects the movement of the encoding member on the basis of the position information output by the line sensor.

REFERENCES:
patent: 4475086 (1984-10-01), Allen
patent: 4518859 (1985-05-01), Hoshika
patent: 5254919 (1993-10-01), Bridges et al.

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