Photoelectric focus and tracking apparatus

Details Photoelectric focus and tracking apparatus Photoelectric focus and tracking apparatus

1980-04-29

1982-10-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

369 45, G01J 120

Patent

active

043529810

ABSTRACT:
In the case where the focus control or the tracking control of a light beam is performed by using the wobbling method in an optical information reproducing apparatus, the envelope of the reproduced signal obtained from the light reflected from the recording medium in a non-modulated state is diode-detected and the detected output is used as a focus control signal while the envelope of the reproduced signal obtained from the recording medium in a modulated state is diode-detected so as to be used as a tracking control signal.

REFERENCES:
patent: 4128847 (1978-12-01), Roullet et al.
patent: 4142209 (1979-02-01), Hedlund et al.
patent: 4203133 (1980-05-01), Bricot et al.
patent: 4243848 (1981-01-01), Utsumi

Affiliated with

Also associated with

Rating

Photoelectric focus and tracking apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photoelectric focus and tracking apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoelectric focus and tracking apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-424414