TTL Focus detecting device for single-lens reflex camera

Details TTL Focus detecting device for single-lens reflex camera TTL Focus detecting device for single-lens reflex camera

1984-06-07

1986-02-18

Adams, Russell E.

354406, G03B 300

Patent

active

045710473

ABSTRACT:
A focus detecting device for use with a single-lens reflex camera in which chromatic aberration of an infrared beam used for focusing is corrected. When the brightness of the image to be photographed is sufficiently high, a beam of visible light is used for focusing, while when the brightness is not sufficiently high, an infrared beam is employed. In the latter case, a chromatic aberration correction signal is employed to correct the focus detection signal so that the focused position as indicated by that signal coincides with that in the case of the visible beam for the same distance to the object. The chromatic aberration correction signal is preferably produced in response to a resistor or the like mounted on the lens.

REFERENCES:
patent: 4385817 (1983-05-01), Saito
patent: 4518242 (1985-05-01), Toyama
patent: 4521093 (1985-06-01), Kawabata et al.

Affiliated with

Also associated with

Rating

TTL Focus detecting device for single-lens reflex camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with TTL Focus detecting device for single-lens reflex camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TTL Focus detecting device for single-lens reflex camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1548584