High resolution rotary encoder having appositely rotating disks

Details High resolution rotary encoder having appositely rotating disks High resolution rotary encoder having appositely rotating disks

1986-11-21

1988-11-29

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, 356375, 341 2, 341 13, H03M 124

Patent

active

047884223

ABSTRACT:
A rotary encoder having first and second slit disks are disposed between a light emitting diode and a light sensor coaxially in proximity to each other, the two slit disks each having a large number of slits formed radially at equal intervals in a peripheral edge portion of the disks, the first slit disk being connected to and rotated by a rotational shaft, and the second slit disk being rotated by interlocking gears in a direction opposite to that of the first disk.

REFERENCES:
patent: 4123653 (1978-10-01), Bovio
patent: 4358753 (1982-11-01), Cascini
patent: 4616131 (1986-10-01), Burkhardt

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