CN201514381U

CN201514381U - Laser Raman spectrometer with surface-enhanced sampler

Info

Publication number: CN201514381U
Application number: CN2009202111094U
Authority: CN
Inventors: 朱弘; 邵杰; 成诚; 吴晶; 唐前进; 陈建永
Original assignee: Third Research Institute of the Ministry of Public Security
Current assignee: Third Research Institute of the Ministry of Public Security
Priority date: 2009-10-22
Filing date: 2009-10-22
Publication date: 2010-06-23
Anticipated expiration: 2019-10-22

Abstract

The utility model discloses a laser Raman spectrometer with a surface-enhanced sampler, which comprises a shell, wherein a laser for providing high-linearity laser beams, a spectrometer, a control device, a display device and a power supply are arranged in the shell, and the control device is respectively connected with the laser, the spectrometer, the display device and the power supply; the laser and the spectrometer are respectively connected with a Raman probe through optical fibers, and a surface-enhanced sampler is also arranged on the upper surface of the shell; the Raman probe is inserted in the reference position of the sampling cavity of the surface-enhanced sampler, and the focus of the Raman probe is positioned on a sample of a surface-enhanced coating sample tank, accordingly, the Raman spectra of the sample on the sample tank of the surface-enhanced sampler can be measured; and also the Raman spectra of the surrounding object can be measured flexibly by holding the Raman probe with hand. The utility model has novel design, simple and reasonable structure, and flexible and convenient measurement of the Raman spectra, improves test performance, expands measuring range, and is suitable for various occasions.

Description

Belt surface strengthens the laser Raman spectrometer of sampler

Technical field

The utility model relates to a kind of spectrometer that species analysis is surveyed that is used for, and particularly a kind of belt surface strengthens the laser Raman spectrometer of sampler.

Background technology

Occurs vibrating the optical radiation of rotational energy level transition because Raman spectrum is the material internal functionality under extraneous optical excitation, its energy is minimum, and only 10 of exciting light energy ^-8-10 ^-14Doubly; When exciting light energy greater than material molecule vibration institute energy requirement, the vibrational energy level transition of molecular group makes material inspire fluorescence, general fluorescent energy is 10 of a Raman light energy ²-10 ⁸Doubly.Fluorescence also was excited when short wavelength laser excited the organic substance Raman light, and Raman spectrum is often flooded by hyperfluorescence, caused and surveyed difficulty, and this is the ubiquitous problem of present visible light laser Raman spectrometer.

In order to solve the ubiquitous problem of laser Raman spectrometer, it is mainly realized with the method that improves Raman spectrum by suppressing fluorescence; Usually adopt following several modes:

One, adopt more that long wavelength laser excites the organism Raman spectrum, but the wavelength response of reading to compose detector accordingly places restrictions on, spectrographic detection is limited in certain wave-number range, and excitation light power increases, and infrared detection needs super low temperature refrigeration etc.;

Two, take in test to add surperficial reinforcing agent and to add the surface to strengthen methods such as substrate subtest, form vibration by nanoscale gold, silver, copper particulate in the surperficial reinforcing agent with sample molecule functional group and rotate resonance, the enhancing Raman spectrum to sample;

Three, on electrode media such as silver-plated mica, coarse gold, silver, copper, put sample solution and carry out Raman spectrum and improve detection, strengthen Raman spectrum.

But these above-mentioned methods are operated all more complicated, adopt surperficial reinforcing agent that the solvent of liquor sample is had requirement, also need to be equipped with conditions such as micro-Raman probe camera lens; Mica reflector plate, electrode base board are not to be fixed on the instrument, are auxiliary material and the consumptive materials of analyzing, and make, use trouble, do not have the product with the analyser one.

The utility model content

In order to overcome the defective that above-mentioned Raman spectrometer and surface strengthen the Detection Techniques existence, the purpose of this utility model is to provide a kind of belt surface to strengthen the laser Raman spectrometer of sampler, laser Raman spectrometer and surface are strengthened sampler make one, laser Raman spectrometer has sampling and testing probe flexibly, test sample Raman spectrum and strengthen sampler by the surface and survey micro sample flexibly, the measured matter Raman spectrum that the strong Raman spectrum of fluorescence is weak, improve detectivity and accuracy, also can surperficial Enhancement Method come the Raman spectrum of test sample, make the Raman spectrometer scope of application wider more practical.

The technical scheme in the invention for solving the technical problem is:

A kind of belt surface strengthens the laser Raman spectrometer of sampler, it is characterized in that, it comprises a housing, be provided with laser instrument, spectrometer, control device, display device and power supply that the high linearity laser beam is provided in the described housing, described control device is connected with described laser instrument, spectrometer, display device and power supply respectively, described laser instrument is connected with Raman probe by optical fiber respectively with spectrometer, also is provided with the surface in the upper surface of described housing and strengthens sampler.

In an embodiment of the present utility model, described surface strengthens sampler and is made of sampling cavity and the sample groove that is coated with gold, silver, chromium, any rete of copper and forms the sample set-point that high-reflecting film strengthens as the surface at probe focus in object space place, and is corresponding at the lens barrel that the reference position and the described Raman of described sampling cavity are popped one's head in.

Further, the upper end of described sampling cavity is provided with step, and the distance between the described step top edge is corresponding with the outer dia of the lens barrel of described Raman probe, and described Raman probe can be enclosed within on the platform of described sampling cavity upper end by lens barrel.

In an embodiment of the present utility model, outside described optical fiber, be set with and be used for flexible pipe that optical fiber is protected.

In an embodiment of the present utility model, on described housing, also be provided with the handle that is easy to carry and operates.

Belt surface of the present utility model strengthens the laser Raman spectrometer of sampler, by the Raman probe is inserted the reference position that the surface strengthens the sampling cavity of sampler, the focus of Raman probe is positioned on the sample of sample groove that the surface strengthens plated film, surveys the Raman spectrum that the surface strengthens sample on the sampler sample groove; Also can survey the Raman spectrum of object on every side neatly by the mode of holding the Raman probe, novel in design, simple and reasonable, the Raman spectrum test is flexible, improve test performance, enlarge the scope of measuring, be fit to multiple applications, realize the purpose of this utility model.

Description of drawings

Fig. 1 is an internal structure synoptic diagram of the present utility model;

Fig. 2 is an external structure of the present utility model;

Fig. 3 is the organigram of sampling cavity of the present utility model.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Embodiment

As shown in Figure 1 and Figure 2, belt surface of the present utility model strengthens the laser Raman spectrometer of sampler, it comprises a housing 10, be provided with laser instrument 11, spectrometer 12, control device 13, display device 14 and power supply 15 that the high linearity laser beam is provided in the housing 10, control device 13 is connected with laser instrument 11, spectrometer 12, display device 14 and power supply 15 respectively, laser instrument 11 is connected with Raman probe 20 by optical fiber 16, spectrometer 12 is connected with Raman probe 20 by optical fiber 17, also is provided with the surface in the upper surface of housing 10 and strengthens sampler 30.

Laser instrument 11 provides the high linearity laser beam to penetrate from Raman probe 20 by optical fiber 16, can test the Raman spectrum of object on every side neatly, determines the object composition; Laser instrument 11 can adopt the laser instrument of 460nm, 532nm, 638nm, 785nm, 833nm equiwavelength's high linearity wavelength stabilization; Spectrometer 12 adopts according to optical maser wavelength can survey 0-+4000cm ^-1The high sensitivity spectrometer of wave-number range; Raman probe 20 is for containing the Raman probe of Rayleigh attenuator, and the cutoff wavelength of Rayleigh attenuator is an optical maser wavelength in the Raman probe 20, and adopts the light path and the camera lens of relevant wavelength; Display device 14 is a display screen, and power supply 15 is laser instrument 11, spectrometer 12, control device 13 and display device 14 power supplies.

Outside optical fiber 16, optical fiber 17, be set with and be used for flexible pipe 18 that optical fiber is protected; On housing 10, also be provided with the handle 19 that is easy to carry and operates.

Surperficial enhancing sampler 30 has been installed on the housing 10, be integral with laser Raman spectrometer, the surface that Raman probe 20 can also be inserted in self strengthens on the sampler 30, be transported in spectrometer 12 and control device 13 computing through the Raman light that the surface strengthens by optical fiber 17 with obtaining sample, can record the faint Raman spectrum of sample, determine sample constituents.

As shown in Figure 3, the surface strengthens sampler 30 and is made of sampling cavity 31 and sample groove 32, and is corresponding with the lens barrel 21 of Raman probe 20 in the reference position of sampling cavity 31; The upper end of sampling cavity 31 is provided with step 33, and the outer dia of the lens barrel 21 of the distance between step 33 top edge 34 and Raman probe 20 is corresponding, and Raman probe 20 can be enclosed within on the step 33 of sampling cavity 31 upper ends by lens barrel 21.

Sample groove 32 is by gold-plated, silver-plated, chromium plating, any material such as copper facing also forms high-reflecting film at the Raman 20 focus in object space places of popping one's head in, carry out fine and closely woven uniform bombardment by laser instrument 11 by the laser focusing focusing zone of optical fiber 16 transmission with Raman probe 20 again, sample groove 32 is made the sample set-point that the surface strengthens, allow small sample be set in the focus place, sample and high-reflecting film generation surface electrical magnetic field humidification under laser excitation, Raman light obtains to improve enhancing, make the Raman 20 detected Raman signals that to be sample strengthen through the surface of popping one's head in, suppress fluorescence excitation, thereby measured its faint Raman spectrum.

More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. a belt surface strengthens the laser Raman spectrometer of sampler, it is characterized in that, it comprises a housing, the laser Raman spectrometer that laser instrument, spectrometer, control device, display device and the power supply that being provided with in the described housing provides the high linearity laser beam formed, described control device is connected with described laser instrument, spectrometer, display device and power supply respectively, described laser instrument is connected with Raman probe by optical fiber respectively with spectrometer, also is provided with the surface in the surface of described housing and strengthens sampler.

2. laser Raman spectrometer according to claim 1, it is characterized in that, described surface strengthens sampler and is made of sampling cavity and the sample groove that is coated with gold, silver, chromium, any rete of copper and forms the sample set-point that high-reflecting film strengthens as the surface at probe focus in object space place, and is corresponding at the lens barrel that the reference position and the described Raman of described sampling cavity are popped one's head in.

3. laser Raman spectrometer according to claim 2, it is characterized in that, the upper end of described sampling cavity is provided with step, distance between the described step top edge is corresponding with the outer dia of the lens barrel of described Raman probe, and described Raman probe can be enclosed within on the step of described sampling cavity upper end by lens barrel.

4. laser Raman spectrometer according to claim 1 is characterized in that, is set with to be used for flexible pipe that optical fiber is protected outside described optical fiber.

5. laser Raman spectrometer according to claim 1 is characterized in that, also is provided with the handle that is easy to carry and operates on described housing.