Focusing apparatus of video camera or the like

Details Focusing apparatus of video camera or the like Focusing apparatus of video camera or the like

1988-08-17

1991-03-26

Scott, Jr., Leon

Facsimile and static presentation processing

Facsimile

Recording apparatus

2502011, H04N 5232

Patent

active

050034006

ABSTRACT:
An electronically-controlled focusing adjustment apparatus including manual focusing adjustment means using a manual focusing adjsutment device such as a variable resistor, focusing lens position detection means, and feedback means for comparing a voltage outputted from a movable terminal of the manual focusing adjustment device with a voltage outputted from the focusing lens position detection means and for feeding back the error between the two voltages to a motor for driving the focusing lens. Desired manual focusing is thus attained with respect to an object located at an arbitrary distance.

REFERENCES:
patent: 4392726 (1983-07-01), Kimura
patent: 4611244 (1986-09-01), Hanma et al.
patent: 4695893 (1987-03-01), Makino et al.
patent: 4717959 (1988-01-01), Isago
patent: 4842387 (1989-06-01), Murakami et al.

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