Imaging spectrometer based on liquid crystal tunable optical filter and full spectrum range automatic acquiring method

Abstract

The invention provides an imaging spectrometer based on a liquid crystal tunable optical filter. The imaging spectrometer comprises a spectrometer and a remote control device, which are in a communicated connection. The spectrometer comprises a housing, an optical lens, and a liquid crystal tunable optical filter. A CCD detector, a DSP processor, and a power supply module are disposed in the housing. The optical lens is disposed on the outer part of the housing, and the tunable optical filter is disposed on the rear part of the optical lens. The reflected light of the object can be tuned and filtered by the liquid crystal tunable optical filter after passing through the optical lens. The imaging spectrometer is advantageous in that the liquid crystal tunable optical filter is used for the core beam splitting, and the CCD detector can be used as the digital light sensing element, and the DSP processor is used as the calculation and control unit; the high-resolution spectral images can be realized, and the tuning of the spectral bands can be realized by controlling the liquid crystal tunable optical filter; by adopting the interaction between the DSP processor and the remote control device, the automatic acquisition of the spectrums and the automatic correction of the calculated parameters can be realized; the use is convenient, and the costs are low.

Description

technical field [0001] The invention relates to the field of spectrometers, in particular to an imaging spectrometer based on a liquid crystal tunable filter and a method for automatically acquiring a full spectral range. Background technique [0002] Imaging spectroscopy is a new type of technology that combines imaging technology and spectroscopy technology. It can not only image objects in space, but also provide rich spectral information. Due to its advantages of high spectral resolution, multiple bands, and the combination of image and spectrum, imaging spectroscopy technology is widely used in remote sensing, medical microscopy and other fields, and can obtain high-resolution two-dimensional and three-dimensional surface images, effectively Differentiate and identify objects on the surface, and obtain spectral images of tiny cell tissues. [0003] The spectrometer currently used is generally a dispersive spectrometer, but the detection sensitivity of the dispersive sp...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of low detection sensitivity and low level of full automation in the existing spectrometer mentioned above, and meets the requirements of high spectral resolution and high energy utilization required by the application, as well as automatic control and automatic parameter correction, etc. For other requirements, provide an imaging spectrometer with a liquid crystal tunable filter as the core spectroscopic setting, a CCD detector as a digital photosensitive element, and a DSP processor as a calculation and control unit, which can obtain high-resolution spectral images and control The liquid crystal tunable filter can realize the arbitrary tuning of the spectral band, and realize the automatic acquisition of the spectrum and the automatic correction of the calculation parameters by using the interaction between the DSP processor and the PC. It is easy to use, low in cost, and the subsequent processing is convenient and fast

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