Focus detecting device

Details Focus detecting device Focus detecting device

1992-08-14

1994-06-14

Adams, Russell E.

G03B 1318

Patent

active

053214617

ABSTRACT:
A focus detecting device includes a plurality of focus detecting systems each having a condenser lens, an aperture stop with pairs of apertures, a reimaging optical system, and light receiving element arrays. The pairs of apertures in the aperture stop are arranged in different directions. The magnifications, focal length and principal points of the reimaging optical systems differ from one another such that images are reformed on the same plane. Thus, the focus detecting device extends the focus detecting area, improves the focusing accuracy, and allows focus detection irrespective of the directions of contrast.

REFERENCES:
patent: 4841326 (1989-06-01), Koyama et al.
patent: 4859842 (1989-08-01), Suda et al.
patent: 4900911 (1990-02-01), Matsui et al.
patent: 4959677 (1990-09-01), Suda et al.
patent: 4982219 (1991-01-01), Uchiyama
patent: 5138143 (1992-08-01), Ishida et al.

Affiliated with

Also associated with

Rating

Focus detecting 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 Focus detecting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focus detecting device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1252670