Color filter, image sensor, and imaging apparatus

Abstract

The invention relates to a color filter, an image sensor and an image pickup device. The light filtering module comprises a color light filter and a control assembly, the color filter comprises a first substrate, a metasurface structure, a dielectric layer and a second substrate, the metasurface structure is located on the first substrate, the metasurface structure comprises a plurality of microstructures arranged periodically, and the dielectric layer is located on the side, away from the first substrate, of the metasurface structure and covers the metasurface structure; the refractive index of the dielectric layer is different from that of the metasurface structure; the second substrate is located at one side of the dielectric layer away from the first substrate; the control assembly is configured to adjust the refractive index of the dielectric layer so as to adjust the wavelength of visible light passing through the color filter. According to the embodiment of the invention, the spectral line of the light passing through the color filter is narrower, the color is purer, when the filtering module is used for the image sensor, optical crosstalk can be avoided, and the frequency of the light passing through the filtering module can be adjustable and variable.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a color filter, an image sensor and an imaging device. Background technique [0002] With the development of CMOS (Complementary Metal Oxide Semiconductor, Complementary Metal Oxide Semiconductor) technology, the performance of the CMOS image sensor has been improved. The development trend of CMOS image sensor is towards planarization, small size, high resolution and portability. The scalability of CMOS image sensing technology has reduced the lateral dimensions of pixels from 10 microns to 2 microns. Along with the reduction in pixel size, color filters need to be redesigned to prevent the degradation of optical performance. Traditional color filters utilize dye polymers for digital color imaging. However, the spectrum of light passing through color filters is broad, and when the pixel size becomes smaller, optical crosstalk between pixels is caused due to the relatively sma...

AI Technical Summary

Problems solved by technology

However, the spectrum of light passing through color filters is broad, and when the pixel size becomes smaller, optical crosstalk between pixels is caused due to the relatively small absorption coefficient of organic dyes.

Images