CN204101461U - Raman probe and can the Raman signal sniffer of auto-focusing - Google Patents
Raman probe and can the Raman signal sniffer of auto-focusing Download PDFInfo
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- CN204101461U CN204101461U CN201420593628.2U CN201420593628U CN204101461U CN 204101461 U CN204101461 U CN 204101461U CN 201420593628 U CN201420593628 U CN 201420593628U CN 204101461 U CN204101461 U CN 204101461U
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Abstract
The utility model provides a kind of Raman probe and can the Raman signal sniffer of auto-focusing, and described device comprises Raman probe, numerical control displacement sample stage, controller; Raman probe is installed on numerical control displacement sample stage, and Raman probe and numerical control displacement sample stage can relative movements, and the signal outgoing side of Raman probe is provided with light intensity detection unit; The output terminal of light intensity detection unit is connected to controller, controller according to light intensity detection element output signal multilevel iudge sample whether at focus place, if not at focus place, send instruction control numerical control displacement sample stage and do corresponding displacement, so repeated multiple times, until sample regulates in the accuracy rating of Raman probe focal length place or setting.The utility model can exact focus, Raman signal is maximized and stable; In contrast to the probe of existing commercial increase fixed range sleeve, the utility model can carry out direct-detection by the hackly sample of effects on surface, and does not need sample pre-treatments.
Description
Technical field
The utility model relates to optical-mechanical, instrument field, particularly, relates to a kind of Raman probe, and laser Raman spectroscopy measure or use in Raman spectrometer can the Raman signal sniffer of auto-focusing.
Background technology
Portable Raman spectrometer has the advantages such as volume is little, speed fast, scene, has broad application prospects in fields such as medicine, food security, safety checks.Portable Raman spectrometer is generally made up of small semiconductor laser, Raman fiber optic probe, spectrometer and computer system.Wherein, the function of Raman probe mainly contains two aspects, is efficiently conducted by laser on the one hand and focuses on detected sample, on the other hand Efficient Collection and filter Raman scattering signal and conducted to spectrometer.
The launching efficiency of Raman spectrum is relevant with laser linewidth and energy density etc.In order to obtain stronger Raman signal, needing laser accurately to aim at and focus on sample to obtain higher laser energy density.Therefore, in large-scale Raman Measurement system, be all configured with micro-focusing system, operating personnel manually focus by micro-image.At present, commercialization Portable Raman spectrometer system because of volume restriction general not containing micro-focusing system, and Raman fiber optic probe is only focused by the mode of manual adjustments, troublesome poeration, cannot exact focus, causes raman scattering intensity to weaken, jitter etc.
Commercial a kind of set a distance probe by installing regular length sleeve additional and fix measuring distance thus guaranteeing the new detector that focuses on before probe.This probe simplifies focus operation process to a certain extent, but when using this probe to measure, sleeve must contact with sample, if sample surfaces out-of-flatness, and can not vernier focusing.
Utility model content
For defect of the prior art, the purpose of this utility model be to provide a kind of can accurately auto-focusing make to collect the maximized Raman probe of Raman signal, can the Raman signal sniffer of auto-focusing.
According to an aspect of the present utility model, provide a kind of Raman probe, described Raman probe comprises the first lens, the first optical filter, catoptron, the 4th lens, the second optical filter, the 3rd optical filter, the 4th optical filter, the second lens, light intensity detection unit; The direction exporting light along optical fiber sets gradually the first lens, the first optical filter and catoptron, first lens, the first optical filter are vertical with light path, catoptron becomes 45 degree with light path, 45 degree, the direction along catoptron reflected light arranges the second optical filter, second optical filter and mirror parallel are arranged, the reflected light path of the second optical filter vertically arranges the 4th lens, optical path direction oppositely along the 4th lens and the second optical filter sets gradually the 3rd optical filter, the 4th optical filter and the second lens, and the opposite side of the second lens arranges optical fiber; 3rd optical filter becomes 45 degree and arranges with light path, the 4th optical filter is vertical with light path with the second lens, and the opposite side of the 3rd optical filter arranges light intensity detection unit; After laser enters Raman probe from fiber optic conduction, directional light is become by the first lens, then through the first optical filter, purification process is carried out to spectrum, again successively through being that 45 ° of catoptrons arranged reflect, the second optical filter reflects to change beam path with directional light, finally by the 4th lens by Laser Focusing in sample; Raman scattering is there is in sample by after laser excitation, scattered light and reflected light enter Raman probe in the other direction and are collected by the 4th lens, the lens set that Raman scattering light transmission is wherein made up of the second optical filter and the 4th optical filter, assemble via the second lens again and be coupled into optical fiber, the lens set that non-Raman signal light is made up of the second optical filter and the 4th optical filter is stopped suppression (reflection or absorption), therefore the second lens can not be arrived, wherein reflected by the 3rd optical filter by the laser that sample reflection is returned, enter light intensity detection unit;
Described light intensity detection unit comprises: the 3rd lens, aperture and electrooptical device, and described aperture is in the focus place of the 3rd lens; The laser of the 3rd optical filter reflection, through the 3rd lens focus, again through small holes after convergence, is radiated on electrooptical device by aperture, is received detection by photoelectric detector.
Preferably, 3rd optical filter is set after described second optical filter and before described 4th optical filter, now, is reflected by the second optical filter by the laser part that sample reflection is returned, another part is reflected by the 3rd optical filter, and the laser of the 3rd optical filter reflection enters light intensity detection unit; The Raman light of the second filter transmission is assembled via described 4th optical filter, the second lens and is coupled into optical fiber.
Preferably, described second optical filter and the 3rd optical filter are dichroscope, arrange with light path angle at 45 °, and described second optical filter and the 3rd optical filter not parallel, both to laser reflection to Raman scattering Transmission light.
Preferably, described catoptron, the second optical filter, the 3rd optical filter, all angle at 45 ° with light path; Described first optical filter, the 4th optical filter are then in 90 ° with light path.
Above-mentioned Raman probe, when the focus place of sample not at described Raman probe, laser will converge at front or the rear place of aperture by light path, and only fraction luminous energy is by aperture, and sample focal point is far away, and the reflected light by aperture is fewer; Only when laser facula just in time focuses on object, the hot spot of the laser of reflection will converge at aperture by light path, and most reflection luminous energy will by aperture, and the light intensity signal that electrooptical device receives is maximum.Due to the spatial selectivity of aperture, under focusing state, most of energy can pass through aperture, and now to obtain light intensity maximum for electrooptical device.So just the range finding problem that is focused is converted into a luminous intensity measurement problem optically quantized.
According to second aspect of the present utility model, what provide a kind of above-mentioned Raman probe composition can the Raman signal sniffer of auto-focusing, comprises Raman probe, numerical control displacement sample stage, controller; Described Raman probe is installed on numerical control displacement sample stage, and Raman probe and numerical control displacement sample stage can relative movements, and the signal outgoing side of described Raman probe is provided with light intensity detection unit; The output terminal of described light intensity detection unit is connected to controller, and whether controller at focus place according to described light intensity detection element output signal multilevel iudge sample, if not at focus place, sends instruction control numerical control displacement sample stage and do corresponding displacement.
Compared with prior art, the utility model has following beneficial effect:
Technological innovation in the utility model avoids people for manual operation, can exact focus, Raman signal is maximized and stable; In contrast to the probe of existing commercial increase fixed range sleeve, the utility model technology can carry out direct-detection by the hackly sample of effects on surface, and does not need sample pre-treatments.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Fig. 1 is the structural representation that the utility model one embodiment has the Raman detection device of automatic focusing function;
Fig. 2 is the structural representation of light intensity detection unit in the utility model one embodiment;
Fig. 3 is that in the utility model one embodiment, displacement adjustment device regulates process flow diagram;
Fig. 4 is pop one's head under aperture gets 100 micron thickness distance between focal plane and sample and the Relationship of Light intensity curve;
In figure: 100 is Raman probe, 200 is numerical control displacement sample stage, and 300 is controller; 1 is optical fiber, and 2 is the first lens, and 3 is the first optical filter, 4 is catoptron, and 5 is the 4th lens, and 6 is the second optical filter, 7 is the 3rd optical filter, and 8 is the 4th optical filter, and 9 is the second lens, 10 is light intensity detection unit, and 11 is sample, and 12 is sample stage, 13 is controller, 14 is the 3rd lens, and 15 is aperture, and 16 is photoelectric detector.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.Following examples will contribute to those skilled in the art and understand the utility model further, but not limit the utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection domain of the present utility model.
As shown in Figure 1, there is for the utility model the structural representation of Raman detection device one embodiment of automatic focusing function, comprise Raman probe 100, numerical control displacement sample stage 200, controller 300; Described Raman probe 100 is installed on numerical control displacement sample stage 200, and Raman probe 100 and numerical control displacement sample stage 200 can relative movements.
In the present embodiment, described Raman probe 100 comprises the first lens 2, first optical filter 3, catoptron 4, the 4th lens 5, second optical filter 6, the 3rd optical filter 7, the 4th optical filter 8, second lens 9, light intensity detection unit 10; Described light intensity detection unit 10 comprises: the 3rd lens 14, aperture 15 and electrooptical device 16.The direction exporting light along optical fiber 1 sets gradually the first lens 2, first optical filter 3 and catoptron 4, first lens 2, first optical filter 3 is vertical with light path, catoptron 4 becomes 45 degree with light path, 45 degree, the direction along catoptron 4 reflected light arranges the second optical filter 6, second optical filter 6 be arranged in parallel with catoptron 4, the reflected light path of the second optical filter 6 vertically arranges the 4th lens 5, the opposite side oppositely setting gradually the 3rd optical filter 7, the 4th optical filter 8 and the second lens 9, second lens 9 along the optical path direction of the 4th lens 5 and the second optical filter 6 arranges optical fiber.3rd optical filter 7 becomes 45 degree and arranges with light path, 4th optical filter 8 is vertical with light path with the second lens 9, reflected light path side along the 3rd optical filter 7 sets gradually the 3rd lens 14, aperture 15 and electrooptical device the 16, three lens 14, aperture 15 and electrooptical device 16 and forms light intensity detection unit 10.
In figure: by the first lens 2, first optical filter 3, catoptron 4, second optical filter 6, the transmission laser assembly one that forms as the 4th lens 5 of Laser Focusing, the conduction Raman light be made up of the 4th lens 5, second optical filter 6 collected as Raman light, the 3rd optical filter 7, the 4th optical filter 8, second lens 9 and suppress parasitic light assembly two, by the laser automatic measuring formed as the 4th lens 5, second optical filter 6 of laser alignment, the 3rd optical filter 7, light intensity detection unit 10 apart from focusing assembly three.Assembly one, assembly two and assembly three form Raman probe 100, and described Raman probe 100 is installed on numerical control displacement sample stage 200.
After laser enters Raman probe 100 from optical fiber 1 conduction, directional light is become by the first lens 2, then purification process is carried out through the first optical filter 3 pairs of spectrum, passing through with directional light is successively that 45 ° of catoptrons arranged 4 reflect, the second optical filter 6 reflects to change beam path again, last by the 4th lens 5 by Laser Focusing in sample, the 4th lens 5 play the effect of Laser Focusing herein; Raman scattering is there is in sample 11 by after laser excitation, scattered light and reflected light enter Raman probe 100 in the other direction and are collected by the 4th lens 5, the lens set that Raman scattering light transmission is wherein made up of the second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8, then be coupled into optical fiber via the second lens 9 convergence vertical with light path; Non-Raman signal light by second and the 3rd the lens set that forms of optical filter 6 and 7 and the 4th optical filter 8 stopped suppression (reflection or absorb), therefore the second lens 9 can not be arrived, wherein reflected by the second optical filter 6 by the laser part that sample reflection is returned, another part is reflected by the 3rd optical filter 7, and the laser that the 3rd optical filter 7 reflects enters light intensity detection unit 10.
The signal of light intensity detection unit 10 delivers to controller 300 after pre-process, amplification, AD conversion, controller 300 according to signal multilevel iudge sample whether at focus place, if not at focus place, send instruction control numerical control displacement sample stage 200 and do corresponding displacement, so repeated multiple times, until sample regulates in the accuracy rating of popping one's head in focal length place or setting.Meanwhile, numerical control displacement sample stage 200 can also carry out the adjustment of other bidimensional, is operated on a fixed pan to make probe.
As shown in Figure 2, described light intensity detection unit 10 comprises and the 3rd lens 14 of the 4th lens 5 the same focal length, aperture 15 and electrooptical device 16.This light intensity detection unit 10 collects the light intensity of light path in order to detection, and by signal input controller 300, regulates numerical control displacement sample stage 200, until light intensity is maximum by controller 300.Particularly, again through small holes 15 after conducting Raman light and suppressing the 3rd first the same with the 4th lens 5 focal length through one lens 14 of the laser of parasitic light assembly to be assembled, finally detection is received by photoelectric detector 16.Described electrooptical device 16 can adopt photoelectric cell, photodiode, CCD, PSD or other light intensity detection devices.As shown in Figure 4, the 4th lens 5 focal plane image images in its conjugate plane and on aperture 14 by the 4th lens 5, second optical filter 6 and the 3rd optical filter 7, the 3rd lens 14; Due to the spatial selectivity of aperture, under focusing state, most of energy can pass through aperture 14, and now to obtain light intensity maximum for photoelectric detector 16.So just the range finding problem that is focused is converted into a luminous intensity measurement problem optically quantized.
In a preferred embodiment, the second optical filter 6 and the 3rd optical filter 7 are 45 ° of dichroscopes, arrange and require to be at angle at 45 ° with light path, act as laser reflection, and to Raman scattering Transmission light.4th optical filter 8 is the long-pass parts suppressing Rayleigh scattering light, arranges and requires as to become vertical relation with light path.I.e. catoptron 4, second optical filter 6 and the 3rd optical filter 7, needs and light path angle at 45 °; Then need with light path in 90 ° for the first optical filter 3, the 4th optical filter 8.The laser that second optical filter 6 reflects is parasitic light, is not utilized.
In the utility model, in order to make structure compacter, reduce parts, reduce costs, second lens 5 are simultaneously as the Raman light collecting lens in the laser focusing lens in assembly one, assembly two, the laser collimator lens in assembly three, i.e. same lens, due to the reversibility of light path, these lens are not identical with the dissimilar light role in the other direction by it for positive dirction, functionally divide into laser focusing, collect Raman light and collimation laser.Concrete parts 5 as shown in Figure 1.4th lens 5 can vertically with light path be arranged, also can other set-up modes.
Described in the utility model have automatic focusing function Raman detection device and be not limited to above-mentioned form, also comprises other version.
For embodiment illustrated in fig. 1, light intensity detection unit 10 specific works is:
A) through beam path alignment focus on laser action on sample;
B) laser after reflections off objects, carries out Raman collection through the 4th lens 5, and through the second optical filter 6 that 45 degree are placed, and in the 3rd optical filter 7 upper part reflection, reflected light focuses on through the 3rd lens 14, is radiated on electrooptical device 16 by aperture 15; Described 3rd lens 14 are consistent with the 4th lens 5 focal length; Described aperture 15 is in the focus place of the 3rd lens 14;
C) when sample is not or not probe focus place, the laser of reflection will converge at front or the rear place of aperture 15 by light path, and only fraction luminous energy is by aperture 15, and sample focal point is far away, and the reflected light by aperture is fewer; Only when laser facula just in time focuses on object, (now hot spot is minimum, namely focusing state is in), the hot spot of the laser of reflection will converge at aperture 15 by light path, and most reflection luminous energy will by aperture 15, and the light intensity signal that detector receives is maximum.
In another preferred implementation of the utility model, displacement adjustment device and sample stage 12 is provided with in described numerical control displacement sample stage 200, this displacement adjustment device be a kind of can at the precise adjusting device of three-dimensional movement, refer in particular to the three-dimensional moving device that can control in the step motor control of three-dimensional movement or piezoelectric ceramics.Because probe and sample exist relative motion, can be fixing by probe, sample is done three-dimensional mobile, also can conversely sample be fixed, probe does three-dimensional motion, or also can taking pops one's head in makes the mode that motion in one dimension combines as two dimensional motion with sample, sample is being particularly suitable for the situation that the vertical plane of probe output beam does two-dimentional relative movement the situation that needs multiple position to be carried out to Scanning Detction, such as when the technology such as Raman and thin-layer chromatography carries out coupling, need to carry out raman spectroscopy measurement to being deployed in multiple positions sample on thin layer plate.
In the utility model above-described embodiment can the Raman signal sniffer of auto-focusing, described displacement adjustment device can be fixedly connected with Raman probe 100 and sample stage 12, Raman probe 100 can with sample stage 12 relative movement.
Based on the probe shown in Fig. 1 and above-mentioned sniffer, what it adopted can the Raman signal detection method of auto-focusing, and step is as follows:
A) testing sample 11 is placed on numerical control displacement sample stage;
B) probe is placed in and is greater than probe focal length above numerical control displacement sample stage and is about 3-5mm place;
C) open laser instrument and export a laser, Raman probe is entered through optical fiber, directional light is become by the first lens 2, then purification process is carried out through the first optical filter 3 pairs of spectrum, reflect through catoptron 4 successively again, second optical filter 6 reflection change beam path, finally by the 4th lens 5 by Laser Focusing in sample;
D) be there is Raman scattering by after laser excitation in sample 11, scattered light and reflected light enter Raman probe in the other direction and are collected by the 4th lens 5, the lens set that Raman scattering light transmission is wherein made up of the second optical filter 6 and the 3rd optical filter 7 and the 4th optical filter 8, then assemble via the second lens 9 and be coupled into optical fiber; Non-Raman signal light by second and the 3rd the lens set that forms of optical filter 6 and 7 and the 4th optical filter 8 stopped suppression (reflection or absorb), therefore the second lens 9 can not be arrived, wherein reflected by the second optical filter 6 by the laser part that sample reflection is returned, another part is reflected by the 3rd optical filter 7, and the laser that the 3rd optical filter 7 reflects enters light intensity detection unit 10;
E) signal is outputted to controller by light intensity detection unit 10, and via controller controls numerical control displacement sample stage and moves, until the signal collected is maximum, completes focusing.
In above-described embodiment, controller adopts computing machine to realize, the signal of electrooptical device 16 enters computing machine through amplifying circuit, AD conversion, computing machine is moved (such as machine command displacement regulating device is in vertical direction propelling etc.) by operation control displacement adjustment device, until the signal collected is maximum, now complete focusing.
In the utility model one preferred implementation, according to following steps when the displacement adjustment device related in above-mentioned sniffer carries out adjustment of displacement, as shown in Figure 3:
A) Raman probe is positioned at the outer 3-5mm place of the outer focal length of sample stage, and initial beam intensity signal is x
0;
B) command displacement regulating device often moves down a step pitch, and measuring now light intensity signal is x
i;
C) as adjacent twice light intensity signal difference x
i-x
i-1when being greater than 0, continuing command displacement regulating device and move, until x
i-x
i-1be less than 0, displacement controller controls oppositely mobile;
D) according to reality focusing precision, can rate-determining steps c) x in process
i-x
i-1step value is reduced when being less than 0, and repeated multiple times, until light intensity difference is less than the minimum value esp of setting.
Fig. 4 is the relation that aperture 15 gets distance under 100 micron thickness between Raman probe 100 focal plane and sample 11 and light intensity.From light intensity and Raman probe 100 distance relation, the utility model can realize the accurate control near focal point 10 microns, and the less then degree of accuracy of aperture 15 is higher.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present utility model.
Claims (6)
1. a Raman probe, is characterized in that, described Raman probe comprises the first lens, the first optical filter, catoptron, the 4th lens, the second optical filter, the 3rd optical filter, the 4th optical filter, the second lens, light intensity detection unit; Wherein: the direction exporting light along optical fiber sets gradually the first lens, the first optical filter and catoptron, first lens, the first optical filter are vertical with light path, catoptron becomes 45 degree with light path, 45 degree, the direction along catoptron reflected light arranges the second optical filter, second optical filter and mirror parallel are arranged, the reflected light path of the second optical filter vertically arranges the 4th lens, optical path direction oppositely along the 4th lens and the second optical filter sets gradually the 3rd optical filter, the 4th optical filter and the second lens, and the opposite side of the second lens arranges optical fiber; 3rd optical filter becomes 45 degree and arranges with light path, the 4th optical filter is vertical with light path with the second lens, and the opposite side of the 3rd optical filter arranges light intensity detection unit; After laser enters Raman probe from fiber optic conduction, directional light is become by the first lens, then through the first optical filter, purification process is carried out to spectrum, more successively through catoptron reflection, second optical filter reflection change beam path, finally by the 4th lens by Laser Focusing in sample; Raman scattering is there is in sample by after laser excitation, scattered light and reflected light enter Raman probe in the other direction and are collected by the 4th lens, the lens set that Raman scattering light transmission is wherein made up of the second optical filter and the 4th optical filter, assemble via the second lens again and be coupled into optical fiber, the suppression that lens set stops that non-Raman signal light is made up of the second optical filter and the 4th optical filter, therefore the second lens can not be arrived, wherein reflected by the 3rd optical filter by the laser that sample reflection is returned, enter light intensity detection unit;
Described light intensity detection unit comprises: the 3rd lens, aperture and electrooptical device, and described aperture is in the focus place of the 3rd lens; The laser of the 3rd optical filter reflection, through the 3rd lens focus, again through small holes after convergence, is radiated on electrooptical device by aperture, is received detection by photoelectric detector.
2. Raman probe according to claim 1, it is characterized in that, after described second optical filter and before described 4th optical filter, the 3rd optical filter is set, now, reflected by the second optical filter by the laser part that sample reflection is returned, another part is reflected by the 3rd optical filter, and the laser of the 3rd optical filter reflection enters light intensity detection unit; The Raman light of the second filter transmission is assembled via described 4th optical filter, the second lens and is coupled into optical fiber.
3. Raman probe according to claim 2, it is characterized in that, described second optical filter and the 3rd optical filter are 45 ° of dichroscopes, arrange with light path angle at 45 °, and described second optical filter and the 3rd optical filter not parallel, both to laser high reverse--bias to the transmission of Raman diffused light height.
4. Raman probe according to claim 2, is characterized in that, described catoptron, the second optical filter, the 3rd optical filter, all angle at 45 ° with light path; Described first optical filter, the 4th optical filter are then in 90 ° with light path.
5. what comprise Raman probe described in any one of claim 1-4 can the Raman signal sniffer of auto-focusing, and it is characterized in that, described device comprises Raman probe, numerical control displacement sample stage, controller; Described Raman probe is installed on numerical control displacement sample stage, and Raman probe and numerical control displacement sample stage can relative movements, and the signal outgoing side of described Raman probe is provided with light intensity detection unit; The output terminal of described light intensity detection unit is connected to controller, and whether controller at focus place according to described light intensity detection element output signal multilevel iudge sample, if not at focus place, sends instruction control numerical control displacement sample stage and do corresponding displacement.
6. according to claim 5 can the Raman signal sniffer of auto-focusing, it is characterized in that, displacement adjustment device and sample stage is provided with in described numerical control displacement sample stage, this displacement adjustment device be a kind of can at the precise adjusting device of three-dimensional movement, described displacement adjustment device is fixedly connected with Raman probe and sample stage, Raman probe can with sample stage relative movement.
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| CN201420593628.2U CN204101461U (en) | 2014-10-14 | 2014-10-14 | Raman probe and can the Raman signal sniffer of auto-focusing |
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| CN201420593628.2U CN204101461U (en) | 2014-10-14 | 2014-10-14 | Raman probe and can the Raman signal sniffer of auto-focusing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383105A (en) * | 2016-08-29 | 2017-02-08 | 上海交通大学 | Raman spectrum measuring device and method capable of automatically adjusting distance between device and measured sample |
| CN110680515A (en) * | 2019-10-28 | 2020-01-14 | 郑超 | Optical fiber probe and device for intraoperative real-time detection of breast cancer incisal margin |
| CN111077530A (en) * | 2019-12-17 | 2020-04-28 | 北京缔科新技术研究院(有限合伙) | Light quantum distance meter with air component measuring function |
-
2014
- 2014-10-14 CN CN201420593628.2U patent/CN204101461U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383105A (en) * | 2016-08-29 | 2017-02-08 | 上海交通大学 | Raman spectrum measuring device and method capable of automatically adjusting distance between device and measured sample |
| CN106383105B (en) * | 2016-08-29 | 2021-02-12 | 上海交通大学 | Raman spectrum measuring device and method capable of automatically adjusting sample measuring distance |
| CN110680515A (en) * | 2019-10-28 | 2020-01-14 | 郑超 | Optical fiber probe and device for intraoperative real-time detection of breast cancer incisal margin |
| CN111077530A (en) * | 2019-12-17 | 2020-04-28 | 北京缔科新技术研究院(有限合伙) | Light quantum distance meter with air component measuring function |
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