Optics: motion pictures – With focus control
Patent
1985-08-08
1986-07-22
Hayes, Monroe H.
Optics: motion pictures
With focus control
354400, 354401, G03B 300
Patent
active
046015574
ABSTRACT:
A focusing system for a variable focus lens of a motion picture camera includes a pulse modulator and a microwave transmitter mounted on a camera frame for generating a high frequency pulsed signal which is transmitted to a selected target which carries a reactive signal generator that is responsive to the first signal for coding and retransmitting the coded signal back to a receiver mounted on the camera frame, and a signal processor for determining the interval of travel of the signal and translating the interval into a distance-analog signal that is transmitted to a focusing motor for driving the focusing mechanism of the lens for focusing the lens at the distance determined by the signal. One alternate embodiment includes multiple reactive signal generators having distinctive signal responsive controls and portable remote transmitters for selectively switching to the selected ones of said reactive generators. Another embodiment includes a system for synchronizing the controls of multiple cameras for preventing interference between them.
REFERENCES:
patent: 4103309 (1978-07-01), Massa
patent: 4239356 (1980-12-01), Freudenschuss et al.
patent: 4294531 (1981-10-01), Shenk
patent: 4472742 (1984-09-01), Hasegawa et al.
Bogle Robert W.
Gero Gary
Wald Stephen L.
LandOfFree
Motion picture camera automatic focusing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motion picture camera automatic focusing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motion picture camera automatic focusing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-862694