US 2021/0082988 A1 · IMAGE-CAPTURE ELEMENT AND IMAGE CAPTURE DEVICE

Abstract

Provided is a highly-sensitive image-capture element and an image capture device that can be simply manufactured, have little polarization dependency, and have micro-spectroscopic elements capable of separating incident light into three wavelength ranges integrated facing a pixel array. An image capture element has a transparent layer having a low refractive index made of SiO2 or the like and a plurality of micro-lenses laminated on a pixel array in which pixels each including a photoelectric conversion element are disposed in an array. Inside the transparent layer having the low refractive index, micro-spectroscopic elements composed of a plurality of microstructures having constant thickness (length in a direction perpendicular to the pixel array) formed of a material such as SiN having a higher refractive index than that of the transparent layer is embedded.

Claims15

Dependent claims

A image-capture element, comprising:

a pixel array in which a plurality of pixels each including a photoelectric conversion element are disposed on a substrate;
a transparent layer formed on the pixel array;
and
a spectroscopic element array in which a plurality of spectroscopic elements are disposed inside or on the transparent layer,
wherein each of the spectroscopic elements includes a set of microstructures composed of a plurality of microstructures formed of a material having a higher refractive index than a refractive index of the transparent layer, wherein the set of microstructures is composed of the plurality of microstructures that have equal length in a direction perpendicular to the pixel array but have a different shape in a horizontal direction with respect to the pixel array, and are disposed at constant intervals, wherein the pixel array is disposed at a position to receive lights that is spectralized by the plurality of spectroscopic elements to different propagation directions according to their respective wavelengths.

2 more elements

A image-capture element, comprising:

a pixel array in which a plurality of pixels each including a photoelectric conversion element are disposed on a substrate;
a transparent layer formed on the pixel array;
and
a spectroscopic element array in which a plurality of spectroscopic elements are disposed inside or on the transparent layer,
wherein each of the spectroscopic elements includes a set of microstructures composed of a plurality of microstructures formed of a material having a higher refractive index than a refractive index of the transparent layer, wherein the set of microstructures is composed of the plurality of microstructures that have a different shape in a horizontal direction with respect to the pixel array, and are disposed at constant intervals, wherein at least part of light incident on the spectroscopic elements is separated into first to third deflected lights that have different propagation directions according to their respective wavelengths, and the lights are emitted from the spectroscopic elements, and enter the three respective pixels disposed consecutively in one direction of the pixel array.

2 more elements

Dependencies are inferred from the claim text.

Image-capture element and image capture device

Life of this patent

Image-capture element and image capture device

Life of this patent

Abstract

Claims15