Absolute encoder

Details Absolute encoder Absolute encoder

1981-06-10

1983-05-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231SE, G01B 534

Patent

active

043842046

ABSTRACT:
An absolute encoder comprising a sensor array, a code plate arranged in opposition to the sensor array and having a plurality of blocks in the direction of normal displacement, each block having an address track and a fine reading track, and an arithmetic unit for processing data of the code plate detected by the sensor array. Each of the blocks of the code plate has a reference track, an address track and a fine reading track. The fine reading track of each block has fine reading patterns which change in a direction crossing said direction of normal displacement.

REFERENCES:
patent: 3270567 (1966-09-01), Crampton

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