Photoelectric imaging sensor

Abstract

The invention discloses a photoelectric imaging sensor, which comprises a filter layer and an imaging unit. The filter layer is composed of a plurality of filter units. Each filter unit comprises fourfilter areas, and red light, green light, blue light and broad-spectrum light are allowed to pass through the four filter areas respectively. The imaging unit is used for receiving the light passingthrough the light filtering layer and imaging. The sensor comprises a visible light imaging unit and a single-photon imaging unit. The filtering areas allowing red light, green light and blue light topass through correspond to the visible light imaging unit, the filtering areas allowing wide-spectrum light to pass through correspond to the single-photon imaging unit, and the single-photon imagingunit is used for receiving weak light signals penetrating through the wide-spectrum filtering areas and amplifying the weak light signals in a high-multiple mode to generate images. Based on a detected scene environment, a color image or a black and white night vision image can be generated, and the single-photon imaging unit receives the weak light signal and amplifies the signal by a high multiple to reach a photoelectric detection sensitivity range to generate an image, so that the sensitivity, signal-to-noise ratio and definition of the sensor are effectively improved.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a photoelectric imaging sensor. Background technique [0002] As society pays more and more attention to the security field, the scope of its applications is gradually increasing, and different users also put forward more and higher requirements for its related equipment and technologies. As the core component of cameras and monitoring equipment, image sensors have a decisive impact on the image quality of the captured scene. The needs of users for security surveillance applications often require surveillance cameras to be able to work 24 hours a day, even at night or in extremely weak light environments, they must be able to obtain clear, intuitive, and accurate images. [0003] The image sensor utilizes the photoelectric conversion function of the photoelectric device. Convert the light image on the photosensitive surface into an electrical signal proportional...

AI Technical Summary

Problems solved by technology

However, most of the existing single-photon detectors have certain limitations. For example, PMTs have low quantum efficiency in the infrared band, large volume, and are easily disturbed by external magnetic fields; APDs have low gain and large noise. Disadvantages such as complex refrigeration circuit

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