Device for accurately adjusting operating angle of Raman optical filter

A working angle and filter technology, which is applied in the measurement device, Raman scattering, optics, etc., can solve the problems of interfering with weak Raman signal measurement, and the filter's weak ability to filter Rayleigh lines.

Inactive Publication Date: 2012-02-22
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

But when it is too close to the Rayleigh line, the ability of the filter to filter the Rayleigh line becomes weaker and weaker, so that the Rayleigh line is very strong and interferes with the measurement of the weak Raman signal nearby.

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  • Device for accurately adjusting operating angle of Raman optical filter
  • Device for accurately adjusting operating angle of Raman optical filter
  • Device for accurately adjusting operating angle of Raman optical filter

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0017] To realize the continuous change of the working wavelength of the Raman filter, the most direct method is to place the Raman filter on a rotatable numerical control platform. However, due to the very large size of the CNC platform, it is impossible for ordinary Raman spectrometers to have enough space for placing the CNC platform. Numerical control electronic equipment is relatively expensive, so this method is difficult to apply to Raman spectrometers, both in terms of compatibility with Raman spectrometers and in terms of cost performance.

[0018] In order to achieve precise adjustment of the working angle of the Raman filter, such as figure 1 As shown, a cantilever support frame 2 is fixed on the bottom plate ...

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Abstract

The invention discloses a device for accurately adjusting the operating angle of a Raman optical filter. The device comprises a base plate (1), a cantilever support frame (2), an inner hexangular fastening screw (4), a cone (5), a fixed baffle (6) and a rotatable baffle (7), wherein the cantilever support frame (2) is fixed on the base plate (1), and is provided with a limited moving slider (3) which can only be moved along a fixed direction; the limited moving slider (3) is provided with a screw hole; the inner hexangular fastening screw (4) is positioned in the screw hole of the limited moving slider (3); the cone (5) is tightly fixed on the inner hexangular fastening screw (4); the fixed baffle (6) is fixed on the base plate (1); the rotatable baffle (7) is arranged on the base plate (7); and the cone (5) is arranged in the seam formed by the fixed baffle (6) and the rotatable baffle (7). By utilizing the device, the operating angle of the Raman optical filter can be accurately adjusted, so as to accurately control the operating wavelength of the Raman optical filter, and the wavelengths of various optical filters in a Raman spectrometer can be accurately controlled.

Description

technical field [0001] The invention relates to the technical field of Raman spectrum testing, in particular to a device for precisely adjusting the working angle of a Raman filter, which uses the Raman filter to filter laser light to perform Raman spectrum testing. Background technique [0002] As we all know, with the development of modern technology, various filters for Raman spectroscopy have emerged. These filters eliminate the need for several monochromators to filter the excitation light, allowing the Raman spectrometer to be very compact. So far, single-grating spectrometers using notch filters and sideband filters have dominated the major Raman spectrometer market. Here, the notch filter and the sideband filter not only play the role of reflecting the excitation light to the sample, but also play the role of filtering the Rayleigh line in the scattered signal. [0003] In Raman spectroscopy, many times people want to obtain Raman signals very close to the excitati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/65G02B7/00
Inventor 谭平恒韩文鹏厉巧巧
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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