Image sensor and imaging apparatus
AssigneeFUJIFILM Corporation
InventorTomoyuki KAWAI
Life of this patent
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Abstract
An image sensor includes: a plurality of pixels arranged and formed in a two-dimensional array so that adjacent ones of the pixels constitute paired pixels and entrance pupils of a first pixel and a second pixel constituting the paired pixels are provided eccentrically in opposite directions to each other with respect to centers of the respective pixels; an incident angle of light from a subject in the first pixel is an incident angle θcA as defined herein; the incident angle in the second pixel is an incident angle −θcB as defined herein; and light sensitivity characteristics of the first pixel and the second pixel with respect to the incident angles of the first pixel and the second pixel are flat characteristics within an incident angle range of the θcA to the −θcB.
Claims21
An image sensor comprising:
- a plurality of pixels arranged and formed in a two-dimensional array so that adjacent ones of the pixels constitute paired pixels and entrance pupils of a first pixel and a second pixel constituting the paired pixels are provided eccentrically in opposite directions to each other with respect to centers of the respective pixels;
- wherein:
- an incident angle of light from a subject in the first pixel is an incident angle θcA which is within a range between 0° corresponding to a normal direction of the pixels and an incident angle θmaxa at a maximum light sensitivity, and in which the light sensitivity of the first pixel is within a range of from 40% to 80% of the maximum light sensitivity;
- the incident angle in the second pixel is an incident angle −θcB which is within a range between 0° corresponding to the normal direction of the pixels and an incident angle θmaxb at the maximum light sensitivity, and in which the light sensitivity of the second pixel is within a range of from 40% to 80% of the maximum light sensitivity;
- and
- light sensitivity characteristics of the first pixel and the second pixel with respect to the incident angles of the first pixel and the second pixel are flat characteristics within an incident angle range of the θcA to the −θcB.
An image sensor comprising:
- a plurality of pixels arranged and formed in a two-dimensional array so that adjacent ones of the pixels constitute paired pixels and entrance pupils of a first pixel and a second pixel constituting the paired pixels are provided eccentrically in opposite directions to each other with respect to centers of the respective pixels;
- wherein:
- an incident angle of light from a subject in the first pixel is an incident angle θcA which is within a range between 0° corresponding to a normal direction of the pixels and an incident angle θmaxa at a maximum light sensitivity;
- the incident angle in the second pixel is an incident angle −θcB which is within a range between 0° corresponding to the normal direction of the pixels and an incident angle θmaxb at the maximum light sensitivity;
- and
- characteristics with respect to the incident angle in the first pixel and the second pixel as to an absolute value of a rate of change in the light sensitivity of the first pixel with respect to the incident angle and an absolute value of a rate of change in the light sensitivity of the second pixel with respect to the incident angle are flat within a range of the incident angle between the incident angle −θcA and the incident angle θcB.
An image sensor comprising:
- a plurality of pixels which are arranged and formed in a two-dimensional array so that adjacent two of the pixels constitute paired pixels;
- micro-lenses which are laminated on the pixels respectively;
- first light shielding films which are laminated on the pixels and formed to be as high as light condensing heights of the micro-lenses respectively;
- light shielding film openings which are opened in the first light shielding films on a first pixel and a second pixel constituting the paired pixels so that the light shielding film openings on the first pixel and the second pixel are provided eccentrically in opposite directions to each other with respect to centers of the pixels respectively;
- and second light shielding films which are formed in different heights from positions where the first light shielding films are formed, so that light incident on the light shielding film opening of each of the pixels opened toward the center of the pixel can be prevented from perpendicularly entering the center of the pixel while the incident light is allowed to obliquely enter a periphery of the pixel in the eccentric direction.
Dependencies are inferred from the claim text.