阅读说明：本技术 双波长激光拉曼光谱仪 (Dual-wavelength laser Raman spectrometer ) 是由 张恒 于 2020-07-01 设计创作，主要内容包括：本发明提供一种双波长激光拉曼光谱仪,包括：双光栅光谱仪、激光发射收集装置和控制器；双光栅光谱仪包括双光栅台、第一光学元件和探测器；激光发射收集装置包括双波长激光模块和双滤光片组；双波长激光模块用于发射第一波长激光或第二波长激光；双光栅台包括两个分别与第一波长激光和第二波长激光一一对应的光栅；双滤光片组包括两个分别与第一波长激光和第二波长激光一一对应的滤光片组；控制器分别与双光栅台、双波长激光模块和滤光片组连接。本发明可以有效实现双波长的自动切换测量,提升了检测效率、耦合效率、核心性能及其应用范围,控制了硬件成本,有利于提升其应用领域的经济效益。(The invention provides a dual-wavelength laser Raman spectrometer, which comprises: the device comprises a double-grating spectrometer, a laser emission and collection device and a controller; the double-grating spectrometer comprises a double-grating table, a first optical element and a detector; the laser emission and collection device comprises a dual-wavelength laser module and a dual-filter set; the dual-wavelength laser module is used for emitting laser with a first wavelength or laser with a second wavelength; the double grating platform comprises two gratings which respectively correspond to the first wavelength laser and the second wavelength laser one by one; the double filter sets comprise two filter sets which respectively correspond to the first wavelength laser and the second wavelength laser one by one; the controller is respectively connected with the double-grating platform, the double-wavelength laser module and the filter set. The invention can effectively realize the automatic switching measurement of double wavelengths, improves the detection efficiency, the coupling efficiency, the core performance and the application range thereof, controls the hardware cost and is beneficial to improving the economic benefit of the application field thereof.)

1. A dual wavelength laser raman spectrometer, comprising:

the device comprises a double-grating spectrometer, a laser emission and collection device and a controller;

the double-grating spectrometer comprises a double-grating table, a first optical element and a detector; the laser emission and collection device comprises a dual-wavelength laser module and a dual-filter set; the dual-wavelength laser module is used for emitting laser with a first wavelength or laser with a second wavelength;

the double grating platform comprises two gratings which respectively correspond to the first wavelength laser and the second wavelength laser one by one; the double filter sets comprise two filter sets which respectively correspond to the first wavelength laser and the second wavelength laser one by one;

the controller is respectively connected with the double-grating platform, the dual-wavelength laser module and the filter set and is used for controlling the dual-wavelength laser module to emit laser with a first wavelength or laser with a second wavelength, moving the filter set corresponding to the emitted laser to an emission light path of the dual-wavelength laser module and rotating the grating corresponding to the wavelength to a measurement light path;

laser emitted by the dual-wavelength laser module is reflected to a measured target object through the optical filter group corresponding to the laser, and a Raman signal generated by the stimulated radiation of the measured target object is transmitted into the double-grating spectrometer through the optical filter group;

and after the Raman signal is diffracted by the grating corresponding to the wavelength, the Raman signal is converged to the detector through the first optical element to obtain Raman spectrum information.

2. The dual wavelength laser raman spectrometer of claim 1, further comprising: an optical element group connected to the controller;

and the controller moves the optical element group out of the observation light path before the dual-wavelength laser module is started.

3. The dual wavelength laser raman spectrometer of claim 2, further comprising: the second optical element, the imaging acquisition device and the light source are connected with the controller; the optical element group includes a third optical element and a fourth optical element;

the controller starts the light source to move the optical element group into the observation light path;

the light emitted by the light source is reflected to the fourth optical element through the third optical element and then transmitted to the detected target object through the fourth optical element;

and the reflected light of the detected target object is reflected to the second optical element through the fourth optical element and then reflected to the imaging acquisition device through the two optical elements so as to obtain an image of the detected target object.

4. The dual wavelength laser raman spectrometer of claim 3, further comprising: a fifth optical element;

the laser emitted by the dual-wavelength laser module is reflected to the fifth optical element through the optical filter group corresponding to the laser and then is converged to the detected target object through the fifth optical element; the Raman signal generated by the stimulated radiation of the measured target object is collimated by the fifth optical element and then transmitted to the filter set;

the light emitted by the light source is reflected to the fourth optical element through the third optical element, transmitted to the fifth optical element through the fourth optical element and then converged to the detected target through the fifth optical element; and the reflected light of the measured target object is transmitted to the fourth optical element after being collimated by the fifth optical element.

5. The dual wavelength laser raman spectrometer of claim 1, wherein the laser emission collection device further comprises: a sixth optical element;

and a Raman signal generated by the stimulated radiation of the measured target object is transmitted to the sixth optical element through the filter set and then is converged by the sixth optical element to enter an incident port of the double-grating spectrometer.

6. The dual wavelength laser raman spectrometer of claim 1, wherein the filter set comprises an interference filter, a dichroic mirror, and a cut-off filter;

the laser emitted by the dual-wavelength laser module is purified by the interference filter of the filter set corresponding to the laser and then reflected to the measured target object by the dichroic mirror, and a Raman signal generated by the stimulated radiation of the measured target object is transmitted to the cut-off filter by the dichroic mirror and enters the dual-grating spectrometer after being filtered by the cut-off filter.

7. The dual wavelength laser raman spectrometer of claim 1, wherein the dual grating spectrometer further comprises: a seventh optical element and an eighth optical element;

the raman signal is collimated by the seventh optical element, then transmitted to the eighth optical element, and reflected to the grating corresponding to the wavelength by the eighth optical element.

8. The dual wavelength laser raman spectrometer of claim 1, wherein the dual grating stage further comprises a grating stage support, the two gratings being mounted on the grating stage support opposite each other;

and the controller controls the grating table bracket to rotate the grating corresponding to the wavelength to the measuring light path according to the wavelength of the emitted laser.

9. The dual wavelength laser raman spectrometer of claim 1, wherein the dual filter set further comprises a filter set mobile station, the two filter sets being mounted on the filter set mobile station;

and the controller controls the filter group moving platform to move the filter group corresponding to the wavelength to the emission light path of the dual-wavelength laser module according to the wavelength of the emitted laser.

10. The dual wavelength laser raman spectrometer of claim 3, wherein the set of optical elements further comprises an optical element moving stage, the third optical element and the fourth optical element being located on the optical element moving stage;

the controller moves the optical element moving stage to move the third optical element and the fourth optical element out of the observation optical path before turning on the dual-wavelength laser module.