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Raman spectrum probe

A technology of Raman spectroscopy and optical filter, which is applied in the field of Raman detection to achieve the effect of improving collection efficiency, improving signal-to-noise ratio, and reducing laser power density

Pending Publication Date: 2020-05-22
BEIJING HUATAI NOVA TECH
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Problems solved by technology

[0005] The present invention aims to solve the problems described above

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0025] In order to effectively reduce the single-point power density of the laser beam, prevent the thermal enrichment of the laser from causing explosions in the dete...

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Abstract

The invention provides a Raman spectrum probe. The probe comprises a laser light source, a dichroscope, a micro-vibration scanning mirror, a micro-lens array, a Raman filter and an exit slit, an excitation light beam emitted by the laser light source is reflected by the dichroscope and the micro-vibration scanning mirror in sequence and then irradiates an object to be measured through the micro-lens array. Raman scattering signals generated by exciting a to-be-detected object by the exciting light beam sequentially pass through the micro lens array, the micro vibration scanning mirror and thedichroscope, are filtered by the Raman light filter and then are emitted out through the exit slit. The micro-lens array is adopted to effectively enlarge the area of a detection sample, so that the laser power density of a single convergent point is greatly reduced; and full-coverage efficient scanning sampling in a large-range detection surface is realized through the micro-vibration scanning mirror, and meanwhile, heat enrichment caused by long-time irradiation of light beams is effectively prevented, so that the safety of sensitive material detection and the reliability of a result are improved.

Description

technical field [0001] The invention relates to the technical field of Raman detection, in particular to a Raman spectrum probe. Background technique [0002] The Raman scattering signal is extremely weak, which is 10% of the Rayleigh scattering signal. -6 ~10 -9 In order to obtain a higher excitation signal, the traditional Raman spectrometer often compromises the accuracy of the measurement results, and concentrates the laser beam on a small spot. Although the signal intensity is improved, the captured information is only is a small part of the sample, especially for inhomogeneous samples or sparse samples, the reliability of the results obtained by this detection method is greatly reduced. In addition, the extremely small focused spot will inevitably lead to an increase in the local laser power density. As the irradiation time exceeds, heat accumulation will cause the sample to be heated to decomposition, especially for dark substances or substances with strong absorpti...

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Application Information

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IPC IPC(8): G01J3/44G01J3/02G01J3/06G01N21/65G01N21/01
CPCG01J3/0208G01J3/06G01J3/44G01J2003/062G01J2003/064G01N21/01G01N21/65G01N2021/0112
Inventor 熊胜军袁丁吴红彦夏征
Owner BEIJING HUATAI NOVA TECH
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