Length- or angle-measuring arrangement

Details Length- or angle-measuring arrangement Length- or angle-measuring arrangement

1987-06-18

1988-05-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231SE, G01D 534, H01J 314, G01B 1100

Patent

active

047437545

ABSTRACT:
A length- or angle-measuring arrangement for measuring the relative position of two objects. A graduation (Ta) lies in a graduation plane (TEa) of a graduation carrier (TTa) which is connected with one of the objects outside the neutral plane (NEa) of the graduation carrier (TTa). The graduation carrier (TTa) is scanned by means of a scanning graduation (ATa) in a scanning graduation plane (ATEa) of a scanning unit (Aa) which is connected with the other object. To eliminate measuring errors brought about by bendings of the graduation carrier (TTa), the scanning graduation (ATa) of the scanning unit (Aa) is arranged in the neutral plane (NEa) of the graduation carrier (TTa).

REFERENCES:
patent: 4079252 (1978-03-01), Brake
patent: 4375592 (1983-03-01), Cox et al.
patent: 4426457 (1984-10-01), Kondo
patent: 4517742 (1985-05-01), Ernst
patent: 4573000 (1986-02-01), Nelle
patent: 4602436 (1986-07-01), Ernst
patent: 4606642 (1986-08-01), Nelle
patent: 4656347 (1987-04-01), Une et al.

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