Deep space exploration microdomain self-adaption raman fluorescence imaging combined system

Abstract

The invention discloses a deep space exploration microdomain self-adaption raman fluorescence imaging combined system. The system is composed of a main controller, a spectrometer, an optical fiber, athree-dimensional motor driver, a three-dimensional precise electric platform and an optical head. The space exploration microdomain self-adaption raman fluorescence imaging combined system disclosedby the invention has the beneficial effects that the self-adaption raman fluorescence imaging combined system can adjust the diameter of a focusing spot in a self-adaption mode in microdomain analysis; a domain average grey degree of an electronic microscope is used as a scanning imaging point intensity and can meet requirements of self focusing and wide-spectrum scanning imaging at the same time;three-dimensional space initiative laser raman, hyperspectral fluorescence and visible wide-spectrum scanning imaging can be achieved at the same time; varieties of information is provided for performing microdomain analysis.

Description

technical field [0001] The present invention relates to a material detection system, in particular to a material detection system using scanning laser Raman imaging, scanning laser-induced fluorescence imaging and area array wide-spectrum scanning imaging, which is suitable for material detection in the open environment of deep space detection of planets, It belongs to the field of planetary in-situ detection. Background technique [0002] For future deep space exploration, higher requirements are put forward for material composition detection technology and methods, and the in-situ fine detection capability is the highest point of technology aimed at by all aerospace powers. Fine detection requires a smaller laser focus point, a small amount of analyzed substances, more abundant elements and molecular types, more accurate quantification, and it is carried out under the monitoring of extremely high spatial resolution imaging. [0003] Laser Raman (Raman) and ultraviolet las...

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Problems solved by technology

The analysis of Raman-like substances in deep space exploration has higher requirements than conventional Raman applications. The main challenges and technical difficulties are that due to the complex composition of minerals contained in the test rocks and soils, the particle size of the same minerals is extremely small

Therefore, in the micro-area analysis, the laser focus spot is required to be on the order of 1 micron, so that the minerals can be accurately analyzed in the micro-area, and the requirements for the microscopic optical path are extremely high. The spot is affected by the degradation of the laser mode and the diffraction limit, so the focused spot is often larger than 5 microns, which cannot meet the requirements; the combination of a free optical path, a short-wavelength laser, and a high-magnification, high-NA microscopic objective can theoretically obtain extremely Small focusing spot, but because the focusing depth of field is extremely small, it is necessary to find a suitable self-focusing scheme for micro-area analysis and three-dimensional structure analysis, and to ensure that the focusing spot size of each point is consistent and consistent with the design value. At the same time, if the self-focusing time Long, it will affect the scanning imaging speed

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