Method and apparatus for detecting focus of moving images with t

Details Method and apparatus for detecting focus of moving images with t Method and apparatus for detecting focus of moving images with t

1994-06-07

1995-07-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

348349, G01J 128

Patent

active

054323312

ABSTRACT:
A focus detecting system is provided for detecting the focus condition of a moving image in an optical system. The focus detecting system includes means for detecting the sharpness of a plurality of sub-images formed along a plurality of sight lines by the optical system, the detecting means including a plurality of detectors arranged in a plane tilted with respect to an optical axis of said optical system and the detectors aligned with a direction of motion of the image formed by the optical system such that the sub-images are detected at a plurality of positions in the vicinity of best focus of the optical system. A time delay is provided between the sub-images such that the sub images represent the same portion of a scene being imaged by the optical system. A position of best focus for said optical system is calculated from the sub-image data.

REFERENCES:
patent: 3945023 (1976-03-01), Stauffer
patent: 4004852 (1977-01-01), Pentecost
patent: 4307947 (1981-12-01), Jyoujiki
patent: 4341953 (1982-07-01), Sakai et al.
patent: 4458145 (1984-07-01), Voles
patent: 4460989 (1984-07-01), Russell
patent: 4494849 (1985-01-01), Namba
patent: 4540881 (1985-09-01), Hayashi et al.
patent: 4621191 (1986-11-01), Suzuki et al.
patent: 4633075 (1986-12-01), Sakai et al.
patent: 4965442 (1990-10-01), Girod et al.
patent: 4992818 (1991-02-01), Karasaki et al.
patent: 5003166 (1991-03-01), Girod
patent: 5166506 (1992-11-01), Fiete et al.

Affiliated with

Also associated with

Rating

Method and apparatus for detecting focus of moving images with t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting focus of moving images with t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting focus of moving images with t will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-504770