Camera having an auto-focusing device

Details Camera having an auto-focusing device Camera having an auto-focusing device

1987-04-22

1988-02-02

Perkey, W. B.

35417311, 354266, G03B 300, G03B 118, G03B 1740

Patent

active

047231394

ABSTRACT:
A camera having a continuous photographing mode in which an exposure operation and a one frame-wind-up operation of a film are repeatedly carried out, comprising RAM, CCD, A/C convertor, a motor, encoder and AF lens control device. CCD and A/D convertor detect a defocus distance of a photographing lens and forming a data representing. The detected defocus distance and stores said data into the RAM. Motor drives the photographing lens. Encoder detects a driven distance of the photographing lens driven by the motor to generate a detection signal and the motor drives the photographing lens such that the drive distance represented by the detection signal coincides with the defocus distance represented by the data of the RAM. AF lens control device discontinues the drive of the photographing lens by the motor prior to the start of the exposure operation in the continuous photographing mode and resuming the drive in the period of a subsequent one-frame wind-up operation and the device controls the motor such that the motor drives the photographing lens in response to the resumption by a distance corresponding to a difference between the drive distance represented by the detection signal at the time of discontinuance and the defocus distance represented by the data of the RAM.

REFERENCES:
patent: 3798660 (1974-03-01), Hasegawa et al.
patent: 4435058 (1984-03-01), Yoshida et al.
patent: 4464037 (1984-08-01), Terui et al.
patent: 4563069 (1986-01-01), Sakai et al.
patent: 4669849 (1987-06-01), Ohtsuka et al.

Affiliated with

Also associated with

Rating

Camera having an auto-focusing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Camera having an auto-focusing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Camera having an auto-focusing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1637687