Electronic imaging device for use with photographic cameras for

Details Electronic imaging device for use with photographic cameras for Electronic imaging device for use with photographic cameras for

1990-12-28

1993-02-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

359726, H01J 4014

Patent

active

051873591

ABSTRACT:
An electronic imaging device comprises a photographic lens system, a thin half mirror obliquely intersecting with the optical axis of the photographic lens system and an electronic image pickup element having a photoelectric converting surface on which rectangular picture elements are arranged regularly in a lattice pattern. Location I of the photoelectric converting surface is determined so as to satisfy the following conditions (1) and (2) or (3) and (4): ##EQU1## wherein the plane including the optical axis and the normal to the half mirror is taken as the meridional surface, the plane perpendicular to the meridional surface is taken as the sagittal surface, the reference symbols I.sub.M and I.sub.S represent the distances from an object located on the optical axis to the images formed by the photogrpahic lens system on the meridional surface and the sagittal surface respectively, and the reference symbols M and S designate the sizes of one of the picture elements as measured on the meridional surface and the sagittal surface respectively. The electronic imaging device is capable of suppressing degradation of resolution minimizing the level of the astigmatic difference.

REFERENCES:
patent: 4265529 (1981-05-01), Yokota
patent: 4565433 (1986-01-01), Kato
patent: 4826301 (1989-05-01), Ikemori

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