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Dual optical path switching imaging spectroscopy system

An imaging spectrum and optical path switching technology, applied in the field of optics, can solve the problems of long time, slow spectral imaging process, and affecting the progress of field experiments

Active Publication Date: 2016-03-23
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

However, dispersion-based imaging spectrometers generally contain slits, and one imaging is only for one scan line of ground objects, and the scope of the field of view cannot be identified until a set of scans is completed, which seriously affects the process of field experiments, especially the lighting conditions. brief case
Based on the original patent "a ground imaging spectrum measurement system" of the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, we proposed the concept of dual optical path switching, using the auxiliary optical path to quickly browse the ground object scene, select the area of ​​interest, and overcome the The spectral imaging process is slow and takes a long time, and it is not suitable for the disadvantages of selecting the field of view area

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Embodiment 1

[0039] This embodiment provides a dual optical path switching imaging spectroscopy system, such as figure 1 As shown, it includes: an oscillating mirror scanning unit 1, an optical path switching unit 2, a spectrum splitting unit 3, and a detection unit 4;

[0040] The oscillating mirror scanning unit 1 carries ground samples to be detected;

[0041] The diffusely reflected light of the feature sample carried by the oscillating mirror scanning unit 1 enters the spectrum splitting unit 3;

[0042] The spectrum splitting unit 3 processes the diffuse reflection light and converges it to the detection unit 4, and the detection unit 4 performs spectral imaging.

[0043] optional, such as figure 2 The dual optical path switching imaging spectroscopy system shown also includes: a driving control unit 5 and a computer unit 6;

[0044] The spectrum splitting unit 3 is connected to the detection unit 4, the detection unit 4 is connected to the computer unit 6 through the drive contr...

Embodiment 2

[0068] This embodiment provides a dual optical path switching imaging spectroscopy system, such as figure 2 As shown, it includes an oscillating mirror scanning unit 1, an optical path switching unit 2, a spectrum splitting unit 3, a detection unit 4, a drive control unit 5, and a computer unit 6; The reflective and imaging lens 10 collects and enters the spectroscopic unit 3 , the spectroscopic unit 3 is connected to the detection unit, and the detection unit 4 is connected to the computer unit 6 through the drive control unit 5 .

[0069] The oscillating mirror scanning unit 1 includes a ground object 9 , an oscillating mirror 8 , a stepping motor 7 and an imaging lens 10 . Among them, the ground object 9 is the region of interest to be observed; the swing mirror 8 is a coated mirror, which is connected to the stepper motor 7 through a mechanical connection, and sweeps back and forth within a certain angle range to scan the ground objects corresponding to different scanning...

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Abstract

The invention discloses a double-optical path switching imaging spectral system, which comprises an oscillating mirror scanning unit, an optical path switching unit, a spectral light splitting unit, and a detection unit; the oscillating mirror scanning unit bears a ground object sample to be detected; the light generated by diffuse reflection of the ground object sample in the oscillating mirror scanning unit enters the spectral light splitting unit; the spectral light splitting unit performs light splitting processing of the diffuse reflection light, and then converges the light into the detection unit; the detection unit performs spectral imaging. According to the double-optical path switching imaging spectral system of the embodiment, the light generated by diffuse reflection of the ground object sample born by the oscillating mirror scanning unit enters the spectral light splitting unit, the spectral light splitting unit processes the diffuse reflection light, and then converges the light into the detection unit, and the detection unit performs spectral imaging. When the system is in a preview mode, the double optical path switching unit enables the system to only have the imaging function, which allows rapid preview of the imaged ground object area before the spectral imaging mode, and allows rapid selection of a ground object of interest or spectral imaging.

Description

technical field [0001] The invention relates to the field of optics, in particular to a dual optical path switching imaging spectrum system. Background technique [0002] At present, the research on dual optical path switching imaging spectroscopy system is mainly based on the push-broom type dual optical path switching imaging spectroscopy system used in the aerospace field. It has important innovations in scientific theory, and has also driven the development of imaging spectroscopy technology and related products in my country in engineering and application. [0003] The dual optical path switching imaging spectroscopy system solves the problem that the spectroradiometer is difficult to accurately correspond to the ground field of view in the field spectrum measurement process, so that the corresponding ground field of view range corresponds to the size of the spectral image pixel, and accurate spectral calibration is obtained. However, dispersion-based imaging spectromet...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/47
Inventor 张红明吴太夏张立福付东杰黄长平杨杭张鹏
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI