CN209784194U

CN209784194U - Portable Raman probe with distributed focusing function

Info

Publication number: CN209784194U
Application number: CN201822106169.1U
Authority: CN
Inventors: 殷磊; 蔡圣闻; 董作人; 刘峰
Original assignee: Nanjing Jian Yi Instrument Equipment Co Ltd
Current assignee: Nanjing Jian Yi Instrument Equipment Co Ltd
Priority date: 2018-12-15
Filing date: 2018-12-15
Publication date: 2019-12-13
Anticipated expiration: 2028-12-15

Abstract

The utility model provides a portable Raman probe with distributed focusing, which mainly relates to Raman detection, and mainly aims to solve the technical problem of dividing high-intensity exciting light into a plurality of beams of exciting light to prevent sample damage, the utility model mainly comprises an integrated shell, an incident optical fiber port, an incident lens, a long-pass filter, a reflector, a probe, a distributed focusing device, a dichroic mirror, a band-pass filter, an emission lens and an emission optical fiber port, which respectively form an incident optical path and an emission optical path, wherein the incident optical fiber port, the incident lens and the long-pass filter are coaxial, the band-pass filter, the emission lens and the emission optical fiber port are coaxial, the probe is connected on the integrated shell, the probe is detachably provided with the distributed focusing device, a plurality of micro lenses are arranged in the distributed focusing device, and the utility model is mainly applied to Raman detection, as a detection probe of a raman detection device.

Description

Portable Raman probe with distributed focusing function

Technical Field

The utility model relates to a raman detection especially relates to a portable raman probe of distribution focus suitable for raman detection.

Background

Since 1928 raman (c.v. raman) of indian scientists discovered raman scattering, laser raman spectroscopy as a spectroscopic analysis technique has been widely used for the detection of various chemical substances, such as food safety, drug explosives, pharmaceutical chemicals and materials, and jewelry and jade, because it can provide rapid, simple, repeatable, and nondestructive qualitative and quantitative analysis. The Raman spectrum technology has obvious advantages, for example, the laser Raman spectrum detection technology does not need a sample preparation process, has low requirements on the shape, size, temperature and state of a sample, and can be used for measurement in physical states of solid, liquid, gas, solution and the like; in addition, the laser Raman detection technology is combined with the surface enhancement technology, so that the requirement on the sample amount is very low during detection, and the method can be suitable for analyzing trace and trace samples; in addition, the Raman scattering adopts a photon probe, which is a nondestructive detection technology and is particularly suitable for analyzing rare or precious samples, such as jewelry jade; in addition, because water is a very weak Raman scattering substance, the water solution sample can be directly measured by adopting the Raman detection technology without considering the influence of water molecule vibration, which shows that the Raman detection technology is particularly suitable for detecting contraband such as liquid explosives, drugs and the like; finally, the laser Raman detection technology has the advantages of rapid imaging, simplicity, high resolution, stable instrument characteristics, simplicity in use, low maintenance cost and the like, and is very suitable for public security anti-terrorism drug prohibition, public safety business, food and drug administration and other departments, and technicians can better master the use method of the laser Raman detection equipment after simple training.

Generally, a laser raman spectroscopy detection system consists of three parts: laser instrument, raman probe and spectral analyser. The laser beam emitted by the laser is collimated and focused by the Raman probe to irradiate the excited substance, and the scattered Raman light is received and filtered by the Raman probe again and then is subjected to Raman spectrum analysis by the spectrum analyzer, so that the detailed information of the chemical structure, phase and form, crystallinity and molecular interaction of the substance is determined.

In a laser Raman spectrum detection system, a Raman probe plays an important role in collimation excitation of light beams, collection of scattered light, filtering extraction of weak Raman scattered light and shielding of stray light. It directly determines the performance and accuracy of the system to a certain extent. Currently, a commercially available raman probe is sold on the market, and the main structure form of the raman probe refers to a double-fiber confocal coaxial backscattering mode of several major companies (such as Dilor, InPhotonics, Visionex, and the like) in the United states, that is, excitation light and scattered light have a common optical path, and the scattered light is focused into another optical fiber through a dichroic mirror for receiving. The structure of the probe adopts a confocal coaxial form, so that the structure of the probe is greatly simplified, the efficiency of a system is improved, and the probe becomes the most popular Raman probe in the market. With the demands of different application fields of the market, various probes are continuously emerging on the structure form. For example, patent CN201110454592.0 proposes a hand-held raman probe, which fully considers the raman compact structure and the stability control of the light source; the patent CN00105918 proposes a single-path near-infrared laser emission probe and a two-path light receiving probe for simultaneously receiving the emergent light of the emission probe in the comprehensive technical field of medical application; patent CN203132699U proposes a raman signal enhancement device used in cooperation with a raman detection probe, which is used in cooperation with a conventional raman detection probe to achieve a better raman signal enhancement effect; the 201310010207 patent uses a metal-plated rectangular pyramid microtip structure and metal nanoparticles at the tip of the microtip structure to form a secondary enhanced surface enhanced Raman probe, thereby overcoming the problem of low enhancement factor of the traditional Raman detector and realizing high-sensitivity surface enhanced Raman detection; patent CN201020297277 proposes a spatial deviation raman spectrum probe, which ideally solves the problem of weak raman effect and greatly improves the effect of signal acquisition and processing.

However, the existing raman probe design scheme still fails to solve the raman detection problem of some dark color samples, i.e., the existing raman probe cannot well detect the dark color samples because the dark color samples are sensitive to exciting light, and the existing raman probe usually needs to be matched with a stronger exciting light source, so that the stronger exciting light can damage the samples after directly irradiating the samples.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a new technical scheme, this scheme comes the incident exciting light to fall into multi-beam exciting light, and then weakens the harm of high-intensity exciting light to the sample through set up the distribution focusing device at sample detection end, has improved raman probe's application range.

The utility model provides a portable Raman probe with distributed focusing, which comprises an integrated shell 1, wherein the integrated shell also comprises an incident optical fiber port 2, an incident lens 3, a long-pass filter 4, a reflector 5, a probe 6, a distributed focusing device 11, a dichroic mirror 10, a band-pass filter 9, a transmitting lens 8 and a transmitting optical fiber port 7; the incident optical fiber port 2, the incident lens 3, the long-pass filter 4, the reflector 5, the dichroic mirror 10, the probe 6 and the distribution focusing device 11 which are arranged in sequence form an incident optical path; the distributed focusing device 11, the probe 6, the dichroic mirror 10, the band-pass filter 9, the emission lens 8 and the emission optical fiber port 7 which are arranged in sequence form an emission light path; the incident optical fiber port 2, the incident lens 3 and the long-pass filter 4 are coaxial, and the band-pass filter 9, the emission lens 8 and the emission optical fiber port 7 are coaxial; the reflecting mirror 5 is obliquely arranged, and the reflecting surface of the reflecting mirror 5 corresponds to the dichroic mirror 10; the probe 6 is connected to the integrated shell 1, the probe 6 is detachably provided with a distributed focusing device 11, and a plurality of microlenses 12 are arranged in the distributed focusing device. .

Preferably, the distributed focusing apparatus is an array lens.

The beneficial technical effects of the utility model reside in that, can disperse the exciting light of high strength into a plurality of less strong exciting lights, and then can effectually prevent the damage that the high strength exciting light caused to the sample through setting up the distribution focusing device. The effectual damage that has weakened the exciting light to the sample of the sample that sets up such as array lens's distribution focusing device at raman probe's sample detection end has obtained unexpected effect, has effectually widened raman detection equipment's application range, for example adopts the technical scheme of the utility model especially can realize the effective accurate detection to dark sample.

Drawings

Fig. 1 is a schematic structural diagram of a portable raman probe with distributed focusing according to the present invention.

Fig. 2 is a schematic structural diagram of a distributed focusing apparatus of a distributed focusing portable raman probe of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The first embodiment.

As attached figure 1, the utility model relates to a portable raman probe of distribution focusing, including integrated shell 1, still include incident fiber port 2, incident lens 3, long pass filter 4, speculum 5, probe 6, distribution focusing device 11, dichroscope 10, band pass filter 9, transmitting lens 8, transmission fiber port 7 in the integrated shell 1.

The incident optical fiber port 2, the incident lens 3, the long-pass filter 4, the reflector 5, the dichroic mirror 10, the probe 6 and the distribution focusing device 11 form an incident light path and are sequentially arranged along with the incident light.

In addition, the distribution focusing device 11, the probe 6, the dichroic mirror 10, the band-pass filter 9, the emission lens 8 and the emission optical fiber port 7 in fig. 1 form an emission light path, and these components are sequentially arranged along with the passing sequence of emission light, namely, a raman light signal generated by excitation after incident light irradiates a sample to be found.

In addition, the incident optical fiber port 2, the incident lens 3 and the long pass filter 4 in the attached drawing 1 are coaxially arranged, and the band pass filter 9, the emission lens 8 and the emission optical fiber port 7 are also coaxially arranged. The reflecting mirror 5 in fig. 1 is installed obliquely so that incident light can be reflected onto the dichroic mirror 10, the reflecting surface of the reflecting mirror 5 corresponds to the dichroic mirror 10, and the dichroic mirror 10 is obliquely disposed. The probe 6 in fig. 1 is connected to the integrated housing 1, and one end of the probe 6 is detachably provided with a distributed focusing device 11. A plurality of microlenses 12 are provided in the distributed focusing apparatus 11 to perform the function of dividing the incident light of high intensity into a plurality of excitation lights of weaker intensity, as shown in fig. 2. As a preferred embodiment, the distributed focusing apparatus 11 may be an array lens.

In the concrete implementation, the light that the laser sent gets into this distribution focusing's raman probe system through incident fiber port 2, then through incident lens 3, then through long pass filter 4, make incident light directive dichroic mirror 10 through speculum 5 after that, incident light shines on the sample through probe 6 after the 11 beam splitting of distribution focusing arrangement, the sample can send corresponding raman excitation light after being shone by the incident light, raman excitation light shines on dichroic mirror 10 through distribution focusing arrangement 11, this dichroic mirror can be to letting the raman light of sample excitation pass through, raman light after passing through pass through band pass filter 9 then through gathering of transmitting lens 8, then shine on corresponding spectrum appearance through transmitting fiber port 7 and obtain corresponding spectral signal.

The utility model has the advantages of mainly adopted the distribution focusing device, can make the incident light of former high strength divide into the multi-beam incident light, the effectual damage that has prevented the sample and probably received.

The above description is the preferred embodiment of the present invention, and the present invention is not limited thereto, and any equivalent replacement and modification made by the present invention should be regarded as the scope covered by the present invention for those skilled in the art without departing from the spirit and essential characteristics of the present invention.

Claims

1. The utility model provides a portable raman probe of distribution focus, includes the integration shell, its characterized in that: the integrated shell also comprises an incident optical fiber port, an incident lens, a long-pass filter, a reflector, a probe, a distributed focusing device, a dichroic mirror, a band-pass filter, an emission lens and an emission optical fiber port; the incident optical fiber port, the incident lens, the long-pass filter, the reflector, the dichroic mirror, the probe and the distribution focusing device which are arranged in sequence form an incident optical path; the distributed focusing device, the probe, the dichroic mirror, the band-pass filter, the emission lens and the emission optical fiber port which are arranged in sequence form an emission optical path; the incident optical fiber port, the incident lens and the long-pass filter are coaxial, and the band-pass filter, the emission lens and the emission optical fiber port are coaxial; the reflecting mirror is obliquely arranged, and the reflecting surface of the reflecting mirror corresponds to the dichroic mirror; the probe is connected to the integrated shell, the probe is detachably provided with a distributed focusing device, and a plurality of microlenses are arranged in the distributed focusing device.

2. A distributed focusing portable raman probe according to claim 1, wherein: the distributed focusing apparatus is an array lens.