In-situ high-pressure confocal Raman spectrum measurement system

[0024] Embodiment 1 General structure of the present invention

[0025] This embodiment provides an in-situ high-pressure confocal Raman spectroscopy measurement system, including a laser light source, a Raman spectrometer optical path system, a laser switching system, a dispersion system, and a signal acquisition system.

[0026] The laser light source is used to emit Raman spectrum excitation light.

[0027] The optical path system of the Raman spectrometer is used to focus and irradiate the excitation laser light on the sample to be tested, and at the same time collect the Raman scattered light generated on the sample. Raman spectrometer optical path system of the present invention comprises beam expander 14,15,16, reflection mirror ( figure 1 Mirror 1~mirror 5 in the middle), neutral filter 14, dichroic mirror 26, objective lens 27, total inversion prism, edge filter 35,36,37, lens 39; Incident laser light is through focusing, mirror reflection, through Wheel 25, the dic...

[0037] Embodiment 2 Objective lens acquisition system

[0038] Such as figure 2 As shown, the scattered light collected by the objective lens 27 passes through a wheel 25 with five dichroic mirrors 26, which are respectively used at different incident wavelengths. Among them, only the 532nm laser has a dichroic mirror, and the remaining two lasers have multiple dichroic mirrors respectively. Has a dichroic mirror for the low wavenumber range. The oblique incident dichroic mirror 26 can filter the stray light that is larger than the laser wavelength band, so as to ensure that the incident laser light is of a single wavelength. The objective lens 27 is used twice in the Raman spectroscopy system of the present invention. Firstly, the laser light is focused on the sample after passing through the objective lens 27 . After the laser hits the sample, it will scatter and excite Raman scattering. Thereafter, the scattered light (including Rayleigh scattering and Raman scattering)...

[0041] Embodiment 3 laser switching system

[0042] Such as image 3 As shown, the structure of the laser switching system 3 has an optical cage assembly 31, the optical cage assembly 31 has a scattered light entrance 32 and a Raman scattered light exit 33; the middle position of the optical cage assembly 31 is equipped with three rotating seats 34 side by side, The first edge filter sheet 35, the second edge filter sheet 36, and the third edge filter sheet 37 are respectively installed along its diameter on the three rotating seats 34; the second edge filter sheet 36 both sides installed in the middle are equipped with Translation total inversion prism (edge ​​3 and edge 4), near the first edge filter plate 35 side of scattered light entrance 32 is equipped with translation total inversion prism (edge ​​1), and the other side is equipped with fixed total inversion prism ( Edge 2), one side of the third edge filter 37 near the Raman scattered light outlet 33 is equipped with ...