Ultra-wide spectrum lensless polarization spectrum system

Abstract

The invention discloses an ultra-wide spectrum lensless polarization spectrum system, the system comprises a substrate and microstructures distributed on the substrate, the shape of each microstructure is an asymmetric rectangle, and each microstructure forms a certain rotation angle on the substrate; after a distant plane wave light source penetrates through the substrate, electromagnetic wave regulation and control are carried out through different duty ratios and rotation angle changes of the microstructures, and control over spectral system parameters including the spectral range, the spectral resolution, the spatial resolution and the polarization characteristic is achieved through electromagnetic wave regulation and control; and calculating phase values required by different position coordinates of the substrate according to the focal length value and the phase function of the target, and matching according to the phase values to obtain parameters of the microstructure on the corresponding position coordinates so as to obtain the full-mode structure array. The system has the advantages of being ultra-light, ultra-thin, high in portability and the like, and strong focusing, large dispersion, variable spectral resolution and polarization characteristics can be integrated at the same time through a single element.

Description

technical field [0001] The invention relates to the technical field of polarization spectrum imaging, in particular to a lensless polarization spectrum system with an ultra-wide spectrum. Background technique [0002] Spectral technology is different from traditional imaging technology. It is a photoelectric detection technology that integrates optics and spectroscopy. The acquired information includes not only two-dimensional spatial information, but also spectral radiation information distributed with wavelength. Spectroscopic technology is widely used in military and civil fields such as aerospace remote sensing, aerial reconnaissance, security monitoring, biomedicine, ecological monitoring, etc. With the advancement of science and technology, the portability and high performance requirements of optical systems are increasing. It has the characteristics of wide band, good imaging performance, light weight and small size. Although the traditional refraction system has good...

AI Technical Summary

Problems solved by technology

Spectral technology is widely used in military and civilian fields such as aerospace remote sensing, aerial reconnaissance, security monitoring, biomedicine, and ecological monitoring. With the advancement of science and technology, the demand for portability and high performance of optical systems is increasing, requiring its It has the characteristics of wide band, good imaging performance, light weight, and small volume. Although the traditional refraction system has good performance, the system structure is complex and bulky

[0003] With the rapid development of ultra-precision processing technology, the processing of diffraction elements can be realized, and the introduction of diffraction elements in the system can realize dispersion, which can simplify the system structure to a certain extent, but the volume is still far beyond the wavelength order, the traditional ultra-large dispersion system The phase shift is generated by gradually accumulating optical path difference along the optical path to modulate the wavefront. The distance of at least one wavelength can have a relatively obvious phase change. Large dispersion, wide-spectrum band, and high-resolution are mutually restricted. If wide-spectrum and the spectral resolution is adjustable, it is necessary to increase the filter wheel to switch different bands to obtain different spectral resolutions, the system is very large; and to obtain the polarization characteristics of the object, it is necessary to add multiple polarizing devices such as polarizers and half-wave plates. Difficult to integrate and high cost

Therefore, even though traditional dispersion control methods are very mature, traditional optical devices still cannot meet the pursuit of ultra-thin, ultra-light, and portable devices today. The existing technology urgently needs an ultra-thin, ultra-light component and integrated dispersion control system

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