Incremental optical encoder with radiation regulation means

Details Incremental optical encoder with radiation regulation means Incremental optical encoder with radiation regulation means

1989-09-19

1991-01-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237R, H01J 314, G01D 534

Patent

active

049820850

ABSTRACT:
An incremental optical encoder comprising a luminous source 1, an encoder disk 4 having windows 5 and a sensor 3 with at least two photosensitive elements. The light intensity from the source may be varied by use of a U-shaped wire 8 having a branch 12 positioned between the luminous source at the photosensitive elements.

REFERENCES:
patent: 2506599 (1950-05-01), Jordan
patent: 3068746 (1962-12-01), Vawter
patent: 3100846 (1963-08-01), Burkhardt
patent: 3365714 (1968-01-01), Timares et al.
patent: 3400275 (1968-09-01), Trump
patent: 4074128 (1978-02-01), Harris, Jr. et al.
patent: 4172994 (1979-10-01), Bergkvist
patent: 4511798 (1985-04-01), Killingsworth
patent: 4593194 (1986-06-01), Graham et al.
patent: 4654525 (1987-03-01), Ebina et al.

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