Arrangement for detecting the position of an index mark relative

Details Arrangement for detecting the position of an index mark relative Arrangement for detecting the position of an index mark relative

1982-03-24

1985-01-08

Willis, Davis L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, 250231SE, H01S 314

Patent

active

044928610

ABSTRACT:
An arrangement for determining the position of an index line relative to a graduation scale, particularly for use in goniometers which operate physically is constituted of a graduation track, a code track and a pulse track, a mask is associated to said tracks having a number of openings which embody a code for a respective value of an encoded graduation mark. The counted measuring values derived from the graduation marks and from the code track are fed into a storage, for example, a shift register.

REFERENCES:
patent: 3982106 (1976-09-01), Stutz
patent: 4342996 (1982-08-01), Jannotta

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