Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1976-01-13
1977-09-06
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250204, 354 25, G01J 120
Patent
active
040470229
ABSTRACT:
Apparatus for photoelectrically determining the position of at least one focal plane of an image inside an optical instrument comprising an optics for imaging at least one object on at least one spatial frequency filter of an optical image correlator and further comprising a measurement display of the light fluxes filtered through the spatial frequency filter. The apparatus 1-45 for receiving the light fluxes concentrated through optical components 3,4 comprises at least one photoelectric detector system 5, 6, 31, 32. This detector system has at least one row of several detectors 11-15, . . . n, and electrical means 16, 17, 26-28, 33-38 are provided for pairwise interrogation of the photoelectric detectors 11-15, . . . n and also for the analysis of the photoelectric signals generated during the interrogation.
REFERENCES:
patent: 3555280 (1971-01-01), Richards
patent: 3781110 (1973-12-01), Leitz et al.
patent: 3798449 (1974-03-01), Reinheimer et al.
patent: 3844658 (1974-10-01), Gela et al.
patent: 3846628 (1974-11-01), Towne
patent: 3875401 (1975-04-01), Stauffer
patent: 3958117 (1976-05-01), Stauffer
Ernst Leitz GmbH
Nelms David C.
Wells Gilbert L.
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