Automatic focusing device

Details Automatic focusing device Automatic focusing device

1984-04-09

1985-08-27

Perkey, William B.

G03B 310

Patent

active

045374899

ABSTRACT:
An active type automatic focusing device which has a signal projecting means and an electromagnetic means for starting a focal point adjusting action actuated by a power supply to the electromagnetic means and is provided with an inhibiting means which inhibits the power supply to the signal projecting means at least during a period in which a current flows to the electromagnetic means for actuating the device.

REFERENCES:
patent: 4053240 (1977-10-01), Aizawa et al.
patent: 4199244 (1980-04-01), Shenk
patent: 4257705 (1981-03-01), Hosoe et al.
patent: 4330202 (1982-05-01), Yokota

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