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High-throughput, high-resolution, high-contrast polarization interference spectroscopy imaging device and method

A high-resolution interference spectral imaging technology, which is applied in the field of high-throughput, high-resolution, high-contrast polarization interference spectral imaging devices, can solve the problems of low detection accuracy, low energy utilization and low resolution, and achieve improved sensitivity, High spectral resolution, high contrast effect

Active Publication Date: 2021-04-20
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the low detection accuracy of traditional Michelson interferometric imaging spectrometers and the low energy utilization and resolution of traditional imaging spectrometers based on Sagnac interferometers, the present invention proposes a high-throughput, high-resolution, high-contrast polarization interferometry Spectral imaging device and method, the device combines a Sagnac interferometer, a polarizing element and a grating to improve the energy utilization rate, resolution and contrast of the spectrometer

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  • High-throughput, high-resolution, high-contrast polarization interference spectroscopy imaging device and method

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Embodiment 1

[0047] Such as figure 1 As described above, the high-contrast, high-throughput, high-resolution coherent dispersion spectral imaging device of this embodiment is mainly composed of a collimator 2, a polarizer 3, a common optical path Sagnac interferometer 4 of an asymmetric structure, a plane mirror EF5, and a dispersion system 6 , Imaging mirror 7 and detector 8 constitute.

[0048] After the target light source passes through the collimating mirror 2 and the polarizing plate 3, it is incident on the common optical path Sagnac interferometer 4 of the asymmetric structure. A device 43, a half-wave plate 44 and an optical path difference etalon 45 located in the outgoing light path of the polarization beam splitter 41. Firstly, the target light source is divided into two polarized lights whose vibration directions are perpendicular to each other by the polarizing beam splitter, namely S light and P light, in which the reflected light is S light and the transmitted light is P l...

Embodiment 2

[0056] figure 1 Since the phases of the two paths of interfering light emitted from the interferometer are opposite, and the angle between the plane mirror EF5 and the incident light is 45°, if a set of dispersion units is used, the intensity of the two paths of light may be canceled due to the opposite phase ,therefore, figure 1 Two sets of dispersing units are used to disperse the two beams of light respectively and image them on the detector. However, if the angle between the flat mirror EF5 and the incident light is not 45°, we can use a set of dispersion units to image the two beams of light at different positions of the CCD. Such as figure 2 , the dispersion system 6 of this embodiment includes a set of dispersion units, that is, a first cylindrical mirror 60, a second cylindrical mirror 61, a slit 62, a collimation system 63 and a grating 64 arranged in sequence along the optical path; the specific imaging steps are: First, adjust the angle of the plane reflector EF...

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Abstract

The invention relates to a high-throughput, high-resolution, high-contrast polarization interference spectrum imaging device and method. Overcome the problems of low detection accuracy of traditional Michelson interferometer imaging spectrometer and low energy utilization and resolution of traditional imaging spectrometer based on Sagnac interferometer, including collimator, polarizer, interferometer, dispersion System, imaging mirror and detector; the interferometer includes a half-wave plate and an optical path difference etalon located in the outgoing light path of the polarization beam splitter; the target light source is incident on the interferometer and uses the half-wave plate to adjust the vibration of S light or P light Direction, so that S light and P light have the same vibration direction; use the optical path difference etalon to adjust the optical path of S light and / or P light, so that a fixed optical path difference is generated between S light and P light; non-polarization The beamer reflects and transmits the S light and P light with the same vibration direction and fixed optical path difference to form interference fringes; the interference fringes are dispersed by the dispersion system and imaged on the detector.

Description

technical field [0001] The invention belongs to the field of spectral imaging, and relates to a high-throughput, high-resolution, high-contrast polarization interference spectral imaging device and method. Background technique [0002] Interferometric imaging spectroscopy technology is a non-destructive, fast and sensitive target recognition and detection technology developed in recent years. At present, this technology is used in environmental monitoring, marine water quality monitoring, biomedicine, astronomical detection, optical fiber communication, military science and agriculture. It has important applications in many fields. [0003] Interferometric spectrometers can generally be divided into two types: time modulation type and space modulation type. The imaging spectrometer based on Michelson interferometer and the imaging spectrometer based on Sagnac interferometer are typical representatives of time modulation type and space modulation type respectively. The form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28G01J3/447G01J3/45G01J3/02
CPCG01J3/0224G01J3/0243G01J3/2823G01J3/447G01J3/45G01J2003/1291
Inventor 陈莎莎魏儒义王鹏冲谢正茂刘宏刘斌狄腊梅严强强
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI