Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1977-12-23
1979-03-06
Grimm, Siegfried H.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
33125A, 33137R, 33143L, 33DIG3, 250555, 250566, G01B 302, G01B 338, G01D 530
Patent
active
041432673
ABSTRACT:
An apparatus for making distance measurements with a high degree of accuracy and a means for interpreting and displaying the results on a digital readout. A binary encoded scale which exhibits a one to one correspondence with discrete locations on said scale and the coded information at those locations is used in making the measurements. The scale is made using photographic reducing techniques. An optical detection system, comprising a magnifying lens, a plurality of light conducting fibers and phototransistors is used to read digital information from the binary encoded scale. An electronic circuit accepts digital code from the optical detection system, decodes it and displays the resulting information on a digital readout.
REFERENCES:
patent: 3358202 (1967-12-01), Pabst et al.
patent: 3512006 (1970-05-01), Haller
patent: 4008523 (1977-02-01), Von Voros
patent: 4035922 (1977-07-01), Von Voros
Johnson Lonnie G.
Lederer John M.
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