Abstract A focus detecting system which comprises photoelectric transducer element arrays for sensing standard and reference light fluxes which have passed respectively through different areas of an exit pupil of a photo-taking lens. The photoelectric transducer element arrays are comprised of a plurality of photoelectric transducer element arrays different in at least position or direction, some of the photoelectric transducer element arrays being arranged at a position containing the optical axis of the photo-taking lens whereas the remaining photoelectric transducer element arrays are arranged at a position which does not contain the optical axis. The direction of the photoelectric transducer element arrays is substantially perpendicular to the imaginary line which is drawn to connect between the optical axis and the position at which the photoelectric transducer element arrays outside the optical axis are arranged.
A focus detecting system oomprising: a first light receiving means, including a first pair of photoelectric arrays, for receiving light passed through a pair of first portions defined in an exit pupil of a photo-taking lens, said first pair of photoelectric arrays corresponding to an axial focus detecting area extended in a first direction on a photo-taking field; a second light receiving means, including at least a second pair of photoelectric arrays, for receiving light passed through a pair of second portions defined in an exit pupil of the photo-taking lens, said second pair of photo-electric arrays corresponding to an off-axis focus detecting extended in a second direction on a photo-taking field, and said second direction being perpendicular to an imaginary line connecting the optical axis of the photo-taking lens with the off-axis focus detecting area and not being parallel to said first direction; and means for calculating the focusing condition of the photo-taking lens on the basis of a plurality of outputs of the first and second light receiving means.
Claim 2
Dependent Claim
171 words
A focus detecting system oomprising: a first light receiving means, including a first pair of photoelectric arrays, for receiving light passed through a pair of first portions defined in an exit pupil of a photo-taking lens, said first pair of photoelectric arrays corresponding to an axial focus detecting area extended in a first direction on a photo-taking field; a second light receiving means, including at least a second pair of photoelectric arrays, for receiving light passed through a pair of second portions defined in an exit pupil of the photo-taking lens, said second pair of photo-electric arrays corresponding to an off-axis focus detecting extended in a second direction on a photo-taking field, and said second direction being perpendicular to an imaginary line connecting the optical axis of the photo-taking lens with the off-axis focus detecting area and not being parallel to said first direction; and means for calculating the focusing condition of the photo-taking lens on the basis of a plurality of outputs of the first and second light receiving means.
Claim 3
Dependent Claim
19 words
The focus detecting system as claimed in claim 1, wherein the second direction is perpendicular to the first direction.
Claim 4
Dependent Claim
57 words
The focus detecting system as claimed in claim 2, wherein the second light receiving means includes a plurality of pairs of photoelectric arrays corresponding to a plurality of off-axis focus detecting areas extended in the second direction on the photo-taking field. This application is a continuation of application Ser. No. 065,904, filed June 24, 1987, now abandoned.