Imaging sensor, monitoring system and design method of imaging sensor

Abstract

An image sensor (10), a monitoring system and a design method for an image sensor. The image sensor (10) comprises: a colour film (100), which with regard to light of the infrared waveband, only allows infrared light having a specific wavelength to pass through, and which comprises a plurality of filters for n colours, each filter corresponding to one colour, and being used for dividing visible light within incident light into light of the n colours; a photosensitive chip (200), including a signal processing circuit and a plurality of photosensitive units, the plurality of photosensitive units respectively sensing the light intensity of light passing through the plurality of filters for the n colours and generating an electrical signal corresponding to the light passing through the plurality of filters for the n colours, the signal processing circuit processing the electrical signal to perform imaging, a gain ratio of the signal processing circuit on the electrical signal being A1 : A2 : ··· : Ai : ··· : Aj : ··· : An, and a light intensity passing-through ratio of the plurality of filters for the n colours on the infrared light having the specific wavelength being M1 : M2 (A1 / A2) : ··· : Mi (A1 / Ai) : ··· : Mj (A1 / Aj) : ··· : Mn (A1 / An). The image sensor (10) achieves the colours desired by a user via adjusting optical properties of the colour filter (100), thereby increasing the range of applications of the image sensor (10).

Description

technical field [0001] The invention relates to the technical field of image imaging, in particular to an image sensor, a monitoring system and a design method of the image sensor. Background technique [0002] As a typical solid-state imaging sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor can be applied in various fields. Because CMOS image sensors have the advantages of low cost and easy integration, they have been widely used in digital products such as digital cameras and digital video cameras. However, for the color cast caused by the outside world, the current CMOS image sensor is mainly filtered by adding an external cut-off filter, which not only increases the cost of the CMOS image sensor, but also reduces the reliability of the CMOS image sensor. For example, when infrared light exists in the application environment of the CMOS image sensor, the infrared light will affect the color cast of the imaging color of the CMOS image sensor, and the ...

AI Technical Summary

Problems solved by technology

However, for the color cast caused by the outside world, the current CMOS image sensor is mainly filtered by adding an external cut-off filter, which not only increases the cost of the CMOS image sensor, but also reduces the reliability of the CMOS image sensor.

For example, when there is infrared light in the application environment of the CMOS image sensor, the infrared light will affect the color cast of the imaging color of the CMOS image sensor, and the color cast is relatively simple

, so when the user wishes that when the incident light has both visible light and infrared light, the user wants the CMOS image sensor to produce the color cast or the degree of color cast that the user wants, the current CMOS image sensor cannot be realized, which leads to the application of the image sensor Narrow range, poor user experience

Images