Method of detecting a focus condition of an imaging optical syst

Details Method of detecting a focus condition of an imaging optical syst Method of detecting a focus condition of an imaging optical syst

1983-11-16

1986-09-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354407, G01V 120

Patent

active

046148655

ABSTRACT:
A method of detecting a focus condition of an imaging optical system such as a camera, a microscope, a high density optical recording and reproducing apparatus or the like is disclosed. The method comprises a step of selecting, in accordance with the state of density distribution of the optical image, between an image sharpness detection method for detecting in-focused condition by obtaining an evaluation value representing sharpness of images projected upon a photoelectric detecting means and an image lateral shift detection method for detecting in-focused condition by a positional relation between an image projected upon the photoelectric detecting means by light fluxes transmitted through a part of an exit pupil of an optical lens and an image projected upon the photoelectric detecting means by light fluxes transmitted through the other part of the exit pupil of the lens.

REFERENCES:
patent: 4297014 (1981-10-01), Nakamura et al.
patent: 4492449 (1985-01-01), Oinoue et al.

Affiliated with

Also associated with

Rating

Method of detecting a focus condition of an imaging optical syst 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 of detecting a focus condition of an imaging optical syst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of detecting a focus condition of an imaging optical syst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-986130