Image sensor and method for optimizing imaging effect

Abstract

The invention discloses an image sensor and a method for optimizing an imaging effect. The imaging accuracy of the image sensor can be improved. The image sensor provided by the invention comprises a pixel array which comprises a plurality of pixel units arranged in an array and which is used for receiving an optical signal; a multispectral film layer which is arranged on the upper surface of the pixel array and which comprises a plurality of spectral channels arranged in an array and used for allowing the optical signals of corresponding spectrum to pass through; and a dimming assembly which is arranged on the upper surface and / or the lower surface of the multispectral film layer, and which comprises a plurality of dimming units arranged in an array and used for adjusting the angle of an optical signal incident to the pixel array. Each spectrum channel is correspondingly provided with one dimming unit, each spectrum channel at least corresponds to one pixel unit, and the projections of the pixel units, the spectrum channels and the dimming units which correspond to one another on the plane where the pixel array is located are at least partially overlapped.

Description

technical field [0001] This application relates to the field of optical devices, in particular to image sensors and methods for optimizing imaging effects Background technique [0002] In the prior art, as the imaging lens becomes more and more integrated and miniaturized, the length of the imaging lens becomes shorter and shorter, and the angle at which the light reaches the pixel unit of the sensor becomes larger and larger. The angle at which light enters each pixel will depend on the position of the pixel. The light near the axis of the lens will enter the pixel at an angle close to zero. As the distance between it and the axis increases, the angle of the pixel position will also increase. Get bigger, and some light won't be able to focus on the pixel, resulting in light loss and less responsive pixels. [0003] For example, for incident light with a large incident angle, it will enter adjacent pixel units after passing through the multi-spectral film layer in the image...

AI Technical Summary

Problems solved by technology

The angle at which light enters each pixel will depend on the position of the pixel. The light near the axis of the lens will enter the pixel at an angle close to zero. As the distance between it and the axis increases, the angle of the pixel position will also increase. Get bigger, and some rays won't be able to focus on the pixel, resulting in light loss and less responsive pixels

[0003] For example, for incident light with a large incident angle, it will enter adjacent pixel units after passing through the multi-spectral film layer in the image sensor, causing color crosstalk and causing color distortion

In addition, some incident light will produce a blue shift after the incident, the peak of the light will move to the short wave direction, and the peak transmittance will decrease, which will have a great impact on product performance and cause image distortion

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