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Snapshot imaging spectrometer based on lens array and spherical stepped array reflector

An array mirror, imaging spectrometer technology, applied in interference spectroscopy, spectrometry/spectrophotometry/monochromator, instruments, etc., can solve the problems of large volume and weight, poor real-time performance, etc. MTF, high stability and real-time performance, the effect of improving the degree of miniaturization and integration

Active Publication Date: 2021-05-04
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of poor real-time performance and large volume and weight of traditional imaging spectrometers, and at the same time solves the mutual restriction between high MTF and high resolution of each channel interference imaging of snapshot interference imaging spectrometers. Lens array and spherical echelon mirror snapshot imaging spectrometer

Method used

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  • Snapshot imaging spectrometer based on lens array and spherical stepped array reflector
  • Snapshot imaging spectrometer based on lens array and spherical stepped array reflector
  • Snapshot imaging spectrometer based on lens array and spherical stepped array reflector

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specific Embodiment approach 1

[0022] Specific implementation mode 1. Combination Figure 1 to Figure 8 To illustrate this embodiment, a sub-channel snapshot interference imaging spectrometer based on a lens array and a spherical stepped array mirror, such as figure 1 As shown, it includes a collimator 1 , a lens array 2 , a beam splitter 3 , a sagittal spherical stepped array mirror 4 , a meridional spherical stepped array mirror 5 , a relay imaging system 6 and a detection front 7 .

[0023] The light field of the target scene is collimated by the collimating mirror 1 to emit parallel light fields of each field of view. The lens array 2 divides the incident parallel light fields of each field of view, and divides them into imaging channels for light field transmission. The beam splitter 3 divides each imaging channel Channel light field equal intensity beam splitting, part of the light field is transmitted to 4 sagittal spherical stepped array mirrors, the other part of the light field is transmitted to 5...

specific Embodiment approach 2

[0032] Specific embodiment two, combine figure 2 (a) and figure 1 as well as image 3 -8 Description of this embodiment, this embodiment is Embodiment 1 of the sub-channel snapshot interference imaging spectrometer based on the lens array and the spherical stepped array mirror described in the specific embodiment 1: Combination figure 2 Describe this embodiment, such as figure 2 The lens unit of the lens array shown in (a) adopts a square unit design, and the size is set to be b×b. At this time, the spherical stepped mirror unit in the sagittal and meridional directions is also a square unit with a size of b×b . A plurality of reflector units of the sagittal spherical stepped array reflector or meridional spherical stepped array reflector are integrally formed.

[0033] The phase modulation function of lens array 2 in the present embodiment is:

[0034]

[0035]

[0036] In the formula, f 0 is the focal length of the lens unit, rect is a rectangular function, co...

specific Embodiment approach 3

[0058] Specific embodiment three, combine figure 2 (b) and Figure 9 This implementation mode is Example 2 of the sub-channel snapshot interferometric imaging spectrometer based on the lens array and spherical stepped array mirror described in the first specific implementation mode. In this embodiment, the lens array 2, the sagittal spherical stepped array mirror 4, and the meridional spherical stepped array mirror 5 are replaced by the lens array 8, the sagittal spherical stepped array mirror 9, and the meridional spherical stepped array mirror array mirror 10.

[0059] In this embodiment 2, the shapes of the lens array unit and the sagittal / meridian spherical stepped array mirror unit in embodiment 1 are changed from a square design to a circular design, and the diameter of the circular unit is b, that is, the geometric relationship is inscribed The square unit described in Example 1. Such as figure 2 (b) shown. At this time, the field of view of the lens array unit i...

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Abstract

The invention discloses a snapshot imaging spectrometer based on a lens array and a spherical stepped array reflector, relates to the technical field of imaging spectrum detection instruments, solves problems that a traditional imaging spectrometer is poor in real-time performance and large in size and weight, and solves the problem that high MTF and a high resolution of interference imaging of each channel of a snapshot interference imaging spectrometer are mutually restricted. The spectrometer comprises a collimating mirror, a lens array, a beam splitter, a sagittal spherical stepped array reflector, a meridian spherical stepped array reflector, a relay imaging system and a detection array plane. Multiple imaging channel transmission is carried out on an incident light field of a target scene through the collimating mirror and the lens array, and phase modulation and telecentricity modulation are carried out on the light field transmitted by the multiple imaging channels through the sagittal and meridian spherical stepped array reflectors. According to the invention, the imaging spectrometer obtains image and spectral information at the same time through one-time measurement, obtains a three-dimensional data cube with high real-time performance, does not contain a moving push-broom component, and has the advantages of integration, light weight, good stability and the like.

Description

technical field [0001] The present invention relates to the technical field of imaging spectrum detection instruments, in particular to a split-channel snapshot interference imaging spectrometer, and more specifically to a multi-imaging lens array and a spherical stepped array reflector for spatial phase modulation and optical field telecentricity Modulated sub-channel snapshot interferometric imaging spectrometer. Background technique [0002] As an important means for people to detect, record, analyze and identify substances, imaging spectrometers with integrated images are widely used in various fields, including atmospheric monitoring, space exploration, earth remote sensing, and biomedicine. At present, most imaging spectrometers use area array detectors to obtain two-dimensional images or one-dimensional slit images plus one-dimensional spectra, and obtain another-dimensional spectra or target images through wavelength scanning or slit scanning, whether it is wavelengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28G01J3/45G01J3/02
CPCG01J3/0208G01J3/2823G01J3/45
Inventor 吕金光陈宇鹏梁静秋王惟彪秦余欣陶金赵百轩赵莹泽郑凯丰
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI