1974-12-26
1977-01-25
Hix, L. T.
354165, G03B 302, G03B 310
Patent
active
040054420
ABSTRACT:
An automatic focusing mechanism for adjusting the focus setting of the objective lens of an optical instrument such as a photographic camera. The adjustable focusing cell of the objective lens is coupled to a pivotal reception means so that the focus setting of the objective lens is maintained coincident with the distance between the camera and an object to be photographed when the longitudinal axis of the reception means is in alignment with a reflected light beam image transmitted from the camera to the object from an emission means spaced from the reception means. A rangefinder circuit controls the pivotal motion of the reception means so as to maintain its longitudinal axis in alignment with the reflected light beam image through variations in camera-to-object distance.
REFERENCES:
patent: 3442193 (1969-05-01), Pagel
patent: 3886567 (1975-05-01), Matsumoto et al.
patent: 3896304 (1975-07-01), Aoke et al.
Broderick Milan A.
Gallagher John A.
Bell & Howell Company
Blanchard James B.
Hix L. T,.
Jacover Jerold A.
O'Connor E. M.
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