In-focus detector for binocular stereoscope

Details In-focus detector for binocular stereoscope In-focus detector for binocular stereoscope

1982-01-05

1983-10-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

350516, G01J 136

Patent

active

044121270

ABSTRACT:
An in-focus detector for binocular stereoscope including a pair of left- and right-hand observation optics comprises a pair of beam splitters disposed on the optical axis of the respective observation optics. Each of the beam splitters derives part of observation light out of the associated observation optics and directs it to a reflecting element, which reflects the light onto a light receiver disposed at a focused position. The light receiver produces photoelectric outputs in accordance with the imaging condition of an image of an object being examined, and an in-focus detection circuit responds to these outputs by detecting an in-focus condition.

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