Planar photoelectric detection system based on color separation focusing diffractive optical element

Abstract

The invention relates to a planar photoelectric detection system based on a color separation focusing diffractive optical element. The planar photoelectric detection system comprises the color separation focusing diffraction optical element, a photon integration loop and an information processing module, wherein the photon integration loop is composed of an optical waveguide array and a phase delayer; the color separation focusing diffractive optical element acquires target optical information; a light beam of a corresponding waveband is divided into at least two narrow-waveband light beams after passing through a phase type focusing grating, the light beams are focused and coupled into the optical waveguide array, and then phase adjustment is realized on the light beams by means of a phase delayer till the two light beams meet interference conditions; and coherent light is input into the information processing module for image restoration, and a high-resolution image is obtained. According to the planar photoelectric detection system, the structure of a block type planar photoelectric imaging system is simplified, the integration burden of the photon integration loop is reduced, the waveguide transmission distance is shortened, and the photon transmission efficiency and the energy utilization rate are improved.

Description

technical field [0001] The invention relates to the field of planar photodetection systems, in particular to a planar photodetection system based on color separation focusing diffractive optical elements. Background technique [0002] In many application fields such as astronomical observation and space remote sensing, in order to detect darker, smaller, and farther targets, the requirements for the detection capabilities of space telescopes are getting higher and higher. The continuous improvement of the spatial resolution of traditional telescopes has encountered technological and Due to engineering bottlenecks, it is difficult to continuously increase the spatial resolution of traditional direct imaging telescopes by increasing the aperture. Therefore, it is particularly important for the development of imaging technology to obtain a new imaging principle and method and break through the theoretical limitations of traditional geometric optics. [0003] Segmented Planar Im...

AI Technical Summary

Problems solved by technology

[0004] The key to the application of SPIDER is the development of photonic integrated circuit (PIC). There are many problems in this design integration method: on the one hand, in the photonic integrated circuit, when integrating each device in a circuit, it is necessary to optimize the compromise design according to the system index; on the other hand, the large-scale waveguide Integration will cause signal crosstalk between waveguides; in addition, a large number of grating beam splitters are integrated in the PIC, and the use of grating beam splitters will increase the loss of the PIC

Images