CN213398203U

CN213398203U - Optical-mechanical device for Raman spectrometer

Info

Publication number: CN213398203U
Application number: CN201922400837.6U
Authority: CN
Inventors: 韩雄; 都有为; 钱锋; 王矛宏; 王辰成
Original assignee: Suzhou Flyingman Precision Instrument Co ltd
Current assignee: Suzhou Flyingman Precision Instrument Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-06-08
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses an ray apparatus device for raman spectroscopy, include: the device comprises a light source device, a condenser lens, a first half lens, a second half lens, an objective lens, a CCD camera and a Raman laser probe; the light source device emits illumination light which sequentially passes through the condenser lens, the first half lens, the second half lens and the objective lens and then irradiates the surface of a sample to be measured; the original path of the reflected light of the sample to be detected returns to sequentially pass through the objective lens and the second semi-transparent lens and then is reflected to the CCD camera by the first semi-transparent lens for imaging; the Raman laser probe emits laser, the laser is reflected by the second semi-transparent mirror and reaches the surface of the sample to be detected through the objective lens, and the sample to be detected generates Raman scattering light, and the Raman scattering light returns to the objective lens and is reflected to the Raman laser probe by the second semi-transparent mirror. The utility model discloses an objective convergence raman laser light spot makes the light spot diameter littleer, and sensitivity is higher, and the location is more accurate, and raman and microscope light path are in on the same focal plane simultaneously, obtain the microscopic image on sample surface like this when acquireing raman signal.

Description

Optical-mechanical device for Raman spectrometer

Technical Field

The utility model belongs to the technical field of optical machinery and specifically relates to a ray apparatus device for raman spectroscopy.

Background

The Raman fiber spectrometer is a detection instrument which is characterized in that the light path of a laser detection head is connected with the spectrometer through an optical fiber, a probe of the Raman fiber spectrometer can be randomly placed at various positions to directly contact with a sample to be detected, and the Raman fiber spectrometer has high portability. With the development of raman spectroscopy, instrumentation and laser technology, raman spectroscopy, as a mature spectroscopic analysis technology, is widely applied to the fields of chemical engineering, materials, petroleum, polymers, biology, environmental protection, geology and the like, and can also be applied to the optical aspects of the fields of physics and chemical laboratories, biology and medicine and the like of scientific research institutions, higher institutions and the like, is mainly used for judging and confirming the research of material components, and can also be applied to the criminal investigation and jewelry industry for detecting drugs and identifying gems.

The Raman fiber spectrometer is a preferred product in the Raman spectrometer series due to the characteristics of accuracy, reasonable price, easy use and the like, but in the actual detection process, the laser light spot is large and cannot be microscopically focused, and only a large number of sample positions can be detected simultaneously, so that the in-situ detection cannot be carried out on the sample position needing fine positioning, the application of the Raman fiber spectrometer is greatly limited, in addition, on one hand, most of sample tables of the existing Raman fiber spectrometer are realized in a hydraulic or air pressure mode, the sample tables are always jumped at a certain distance during lifting, the fine and accurate adjustment of the lifting process is difficult to realize, and the requirement of the modern social precision test cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem, provide an ray apparatus device for raman spectroscopy, include: the device comprises a light source device, a condenser lens, a first half lens, a second half lens, an objective lens, a CCD camera and a Raman laser probe;

the illumination light emitted by the light source device sequentially passes through the condenser lens, the first half lens, the second half lens and the objective lens and then irradiates the surface of the sample to be measured; the reflected light of the sample to be detected returns to pass through the objective lens and the second semi-transparent lens in sequence and then is reflected to the CCD camera by the first semi-lens for imaging;

laser emitted by the Raman laser probe is reflected by the second semi-transparent mirror, passes through the objective lens and then reaches the surface of a sample to be detected, and Raman scattering light generated by the sample to be detected returns to pass through the objective lens, is reflected to the Raman laser probe by the second semi-transparent mirror, and then is transmitted to the Raman spectrometer.

Preferably, the sample processing device further comprises a base platform, a lower shell arranged on the base platform, an upper shell arranged on the lower shell, an electric lifting device and a sample stage arranged on the electric lifting device, wherein the electric lifting device is used for adjusting the vertical position of the sample stage.

Preferably, the raman laser probe is fixedly connected to a side portion of the upper housing, a light emitting end of the raman laser probe is connected to a first lens mounting barrel extending into the upper housing, an inclined opening facing upward is formed in the tail end of the first lens mounting barrel, and a lens mounting hole for mounting the second semi-transparent mirror is formed in the outer wall of the first lens mounting barrel below the inclined opening.

Preferably, the light source device is attached to an upper surface of the upper case, and the objective lens is attached to a lower surface of the upper case.

Preferably, wherein, first half lens pass through the setting of second lens installation section of thick bamboo inside the upper casing, the structure of a second lens installation section of thick bamboo with a first lens installation section of thick bamboo is the same, light source device, first half lens, second half lens, objective set gradually from last to bottom.

Preferably, the electric lifting device comprises a motor arranged in the base platform, a screw rod in driving connection with the motor, a sliding sleeve sleeved on the screw rod through threads, a base plate fixedly connected with the sliding sleeve, and two groups of guide assemblies arranged on two sides of the screw rod, wherein the sample platform is fixedly connected on the base plate;

the direction subassembly includes the rigid coupling and is in two parallel guide bars, slidable cover between last casing and the base platform are established direction slider on two guide bars, connection are in go up the spring between direction slider and the last casing and connect the lower spring between direction slider and the lower casing, the direction slider with the base plate rigid coupling.

Preferably, an upper end of the screw rod is rotatably connected with the upper housing through a bearing. Preferably, a slide hole for inserting the guide rod is formed in the guide slider in a vertically penetrating manner.

Preferably, an annular ball groove is formed in the inner wall of the sliding hole along the circumferential direction, and a rolling ball is arranged in the annular ball groove.

Preferably, the cross section of the annular ball groove is in a partially truncated circle shape, so that the outer part of the rolling ball in the annular ball groove is exposed out of the annular ball groove.

The utility model discloses at least, include following beneficial effect: (1) the optical fiber type Raman spectrometer is integrated with a common optical microscope, micron-level area detection is carried out on the surface of a sample by utilizing the design of a Raman spectrum and an optical microscope confocal light path, and microscopic image measurement can also be carried out by using the optical fiber type Raman spectrometer and the optical microscope confocal light path, so that the appearance structure of the surface of the micro-nano material can be observed and analyzed, and the Raman spectrum data of the surface of the micro-nano material can be detected and the chemical components of the surface of the micro-nano material can be; (2) due to the addition of the microscopic function, the diameter of the Raman light spot is smaller, higher resolution can be obtained, and the morphology and Raman spectrum data can be detected in situ in the microscopic field; (3) the design of electric lift device guide assembly realizes the accurate fine adjustment of sample platform automatic rising process.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an opto-mechanical apparatus for a raman spectrometer according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a hidden upper housing of an opto-mechanical device for a raman spectrometer according to an embodiment of the present invention;

fig. 3 is a schematic view of an internal optical path of an opto-mechanical device for a raman spectrometer according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an electric lifting device according to an embodiment of the present invention.

Fig. 5 is a side view of the lower housing according to an embodiment of the present invention.

Fig. 6 is a side view of the annular ball groove and the rolling ball according to the embodiment of the present invention.

In the figure: 1. a base platform; 2. a control panel; 3. an electric lifting device; 4. a sample stage; 5. an upper housing; 6. an objective lens; 7. a Raman laser probe; 8. a light source device; 9. a CCD camera; 10. a condenser lens; 11. a first half lens; 12. a second half mirror; 13. a lower housing; 14. a screw rod; 15. a sliding sleeve; 16. a guide slider; 17. an upper spring; 18. a lower spring; 19. a bearing; 22. a guide bar; 23. A guide assembly; 24. a slide hole; 25. an annular ball groove; 26. rolling a ball; 27. a sliding long groove; 28. a first lens mounting cylinder; 29. an inclined opening; 30. a lens mounting hole.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

Referring to fig. 1-6, an opto-mechanical arrangement for a raman spectrometer, comprising: the device comprises a light source device 8, a condenser lens 10, a first half lens 11, a second half lens 12, an objective lens 6, a CCD camera 9 and a Raman laser probe 7; wherein, the condenser lens 10 is connected with the light source device 8, the first half lens 11 is connected with the CCD camera 9, and the second half lens 12 is connected with the Raman laser device.

Still include base platform 1, set up lower casing 13 on the base platform, set up last casing 5, electric lift device 3 and setting on lower casing 13 sample platform 4 on the electric lift device 3, electric lift device 3 is used for adjusting the vertical position of sample platform 4. The light source device 8 is attached to the upper surface of the upper case 5, and the objective lens 6 is attached to the lower surface of the upper case 5. The raman laser probe 7 is fixedly connected to the side of the upper housing 5, the light-emitting end of the raman laser probe 7 is connected to a first lens mounting tube 28 extending into the upper housing 5, the end of the first lens mounting tube 28 is provided with an inclined opening 29 facing upward, and the outer wall of the first lens mounting tube 28 below the inclined opening 29 is provided with a lens mounting hole 30 for mounting the second semi-transparent mirror 12. The first half lens 11 is arranged inside the upper shell 5 through a second lens mounting tube 28, the structure of the second lens mounting tube is the same as that of the first lens mounting tube, and the light source device 8, the first half lens 11, the second half lens 12 and the objective lens 6 are sequentially arranged from top to bottom.

The illumination light emitted by the light source device 8 is irradiated on the surface of the sample to be measured after sequentially passing through the condenser lens 10, the first half lens 11, the second half lens 12 and the objective lens 6; the original path of the reflected light of the sample to be detected returns to sequentially pass through the objective lens 6 and the second half-lens 12 and then is reflected to the CCD camera 9 by the first half-lens 11 for imaging;

laser emitted by the probe of the Raman laser 7 is reflected by the second semi-transparent mirror 12, passes through the objective lens 6 and then reaches the surface of the sample to be detected, and Raman scattering light generated by the sample to be detected returns to pass through the objective lens 6 and then is reflected to the probe of the Raman laser 7 by the second semi-transparent mirror 12, and then is transmitted to the Raman spectrometer. Because the light spot of the Raman laser can be converged through the objective lens 6, the diameter of the light spot is smaller, the sensitivity is higher, and the positioning is more accurate; in addition, the objective lens model can be changed to obtain higher sensitivity and positioning accuracy. Meanwhile, the Raman optical path and the microscope optical path are on the same focal plane, so that a microscopic image of the surface of the sample can be acquired while a Raman signal is acquired.

The electric lifting device 3 comprises a motor arranged in the base platform 1, a screw rod 14 in driving connection with the motor, a sliding sleeve 15 sleeved on the screw rod 14 in a threaded manner, a base plate fixedly connected with the sliding sleeve 15 and two groups of guide assemblies 23 arranged on two sides of the screw rod 14, the sample stage 4 is fixedly connected on the base plate, and the upper end of the screw rod 14 is rotatably connected with the upper shell 5 through a bearing 19.

The guide assembly 23 includes two parallel guide rods 22 fixedly connected between the upper housing 5 and the base platform 1, a guide slider 16 slidably sleeved on the two guide rods 22, an upper spring 17 connected between the guide slider 16 and the upper housing 5, and a lower spring 18 connected between the guide slider 16 and the lower housing 13, wherein the guide slider 16 is fixedly connected with the substrate. The setting of upper and lower spring can reduce the effect of crawling of motor: when the motor stops, the screw rod 14 can rotate in a small range due to the inertia effect, the sample platform 4 is driven to shake in a small range, the pre-tightening effect of the upper spring and the lower spring can reduce the shake in the small range, and the electric lifting device 3 is more accurate in lifting adjustment.

The side part of the lower shell is provided with a sliding long groove 27, the inner end of the base plate is connected with the sliding sleeve 15 and the guide sliding block 16, the outer end of the base plate extends out of the sliding long groove 27 to be connected with the sample table 4, and the base plate can slide up and down in the sliding long groove 27 when the sample table 4 moves up and down.

Wherein, a slide hole 24 for inserting the guide rod 22 is provided in the guide slider 16. In a further preferred embodiment, an annular ball groove 25 is circumferentially formed on the inner wall of the sliding hole 24, and a rolling ball 26 is arranged in the annular ball groove 25. The cross section of the annular ball groove 25 is partially truncated and circular, so that the outer part of the ball 26 in the annular ball groove 25 is exposed out of the annular ball groove. In this embodiment, at least 3 sets of annular ball grooves 25 are arranged from top to bottom at intervals. An annular ball groove 25 is formed in the guide sliding block 16 along the circumferential direction, a rolling ball 26 is arranged in the annular ball groove 25, the rolling ball 26 can roll freely in the annular ball groove 25 and cannot slide out, when the guide rod 22 is inserted into the sliding hole 24 to slide relatively, the rolling contact between the rolling ball 26 and the guide rod 22 can reduce friction force, and multiple groups of rolling balls in the vertical direction can ensure the linearity of the guide sliding block 15 in sliding relative to the guide rod 22.

Electric lifting process: the motor drives the screw rod 14 to rotate, the sliding sleeve 15 is sleeved on the screw rod 14, and the guide assemblies 23 are arranged on two sides of the screw rod 14, so that the sliding sleeve 15 moves up and down along the screw rod 14, and the sliding sleeve 15 is fixedly connected with the base plate, so that the axial movement of the base plate is driven, and the sample platform 4 is further driven to lift.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. An opto-mechanical arrangement for a raman spectrometer, comprising: the device comprises a light source device, a condenser lens, a first half lens, a second half lens, an objective lens, a CCD camera and a Raman laser probe;

2. The opto-mechanical arrangement for a raman spectrometer of claim 1 further comprising a base platform, a lower housing disposed on the base platform, an upper housing disposed on the lower housing, an electrical lifting device, and a sample stage disposed on the electrical lifting device,

the electric lifting device is used for adjusting the vertical position of the sample table.

3. The optical mechanical device for the raman spectrometer according to claim 2, wherein the raman laser probe is fixedly connected to a side portion of the upper housing, a light emitting end of the raman laser probe is connected to a first lens mounting cylinder extending into the upper housing, a terminal of the first lens mounting cylinder has an inclined opening facing upward, and a lens mounting hole for mounting the second semi-transparent mirror is formed in an outer wall of the first lens mounting cylinder below the inclined opening.

4. The opto-mechanical arrangement for a raman spectrometer of claim 3 wherein said light source arrangement is attached to an upper surface of said upper housing and said objective lens is attached to a lower surface of said upper housing.

5. The opto-mechanical device for raman spectrometer of claim 4, wherein the first half lens is disposed inside the upper housing through a second lens mounting cylinder, the second lens mounting cylinder has the same structure as the first lens mounting cylinder, and the light source device, the first half lens, the second half lens, and the objective lens are sequentially disposed from top to bottom.

6. The opto-mechanical device for raman spectrometer of claim 5, wherein the motorized lifting device comprises a motor disposed in the base platform, a lead screw drivingly connected to the motor, a sliding sleeve threadedly fitted on the lead screw, a base plate fixedly connected to the sliding sleeve, and two sets of guide assemblies disposed on two sides of the lead screw, the sample stage being fixedly connected to the base plate;

the direction subassembly includes that the rigid coupling is in two parallel guide bars, slidable cover between last casing and the base platform are established two direction slider on the guide bar, connect and be in go up the spring between direction slider and the last casing and connect the lower spring between direction slider and the lower casing, the direction slider with the base plate rigid coupling.

7. The opto-mechanical arrangement for a raman spectrometer according to claim 6, characterized in that an upper end of said screw rod is rotatably connected with said upper housing by a bearing.

8. The optical mechanical device for the raman spectrometer of claim 6, wherein a slide hole for inserting the guide rod is vertically perforated in the guide slide block.

9. The opto-mechanical device for raman spectrometer according to claim 8, wherein an annular ball groove is formed in an inner wall of the slide hole along a circumferential direction, and a rolling ball is arranged in the annular ball groove.

10. The opto-mechanical arrangement for a raman spectrometer according to claim 9, wherein the cross-section of said annular ball groove is partially truncated circular such that the outer portion of the rolling ball therein is exposed out of said annular ball groove.