Focus adjusting device

Details Focus adjusting device Focus adjusting device

1985-12-05

1987-09-15

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250211R, 354404, 356 4, G01J 120, G01C 308, G03B 300

Patent

active

046941495

ABSTRACT:
In a focus adjusting device having a light projecting source for projecting distance measuring light onto an object, a light sensing element divided into a plurality of light sensing areas for sensing the light reflected by the object, and a control member for controlling a lens to be at an in-focus position based on a signal from the light sensing element, a boundary line between the divided light sensing areas of the light sensing element is formed with a number of straight lines or curves, so that the boundary is comb-tooth formed or saw-tooth formed in such a manner that a part of one divided area is positioned in the other divided area.

REFERENCES:
patent: 4591919 (1986-05-01), Kaneda et al.

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