CN215297140U - Ellipsoidal laser reflection focusing module - Google Patents
Ellipsoidal laser reflection focusing module Download PDFInfo
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- CN215297140U CN215297140U CN202120809590.8U CN202120809590U CN215297140U CN 215297140 U CN215297140 U CN 215297140U CN 202120809590 U CN202120809590 U CN 202120809590U CN 215297140 U CN215297140 U CN 215297140U
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Abstract
The utility model relates to an ellipsoid laser reflection focus module belongs to the laser spectroscopy field. The utility model provides an ellipsoid laser reflection focus module, the light that utilizes a focus to send assembles in this characteristic of another focus after the reflection of ellipsoid inner wall, arranges gas or liquid sample inside the ellipsoid speculum in, focuses on the ellipsoid focus through laser multiple reflection in the ellipsoid speculum to realize the reinforcing more than 100 times of ellipsoid focus department sample spectral signal.
Description
Technical Field
The utility model relates to a laser spectrum, in particular to ellipsoid laser reflection focus module.
Background
Laser spectroscopy is a spectroscopic technique in which laser light is used as a light source. Compared with the common light source, the laser light source has the characteristics of good monochromaticity, high brightness, strong directivity, strong coherence and the like, and is an ideal light source for researching the interaction between light and a substance so as to identify the structure, the composition, the state and the change of the substance and a system in which the substance is positioned. The advent of lasers has enabled the prior art spectroscopy to achieve significant improvements in sensitivity and resolution. Since laser light having extremely high intensity and extremely narrow pulse width is obtained, observation of a multiphoton process, a nonlinear photochemical process, and a relaxation process after molecules are excited becomes possible, and new spectroscopic techniques are developed, respectively. Laser spectroscopy has become a research area of great relevance to physics, chemistry, biology, and materials science.
At present, laser spectroscopy technologies such as raman spectroscopy, laser-induced breakdown spectroscopy and the like are widely applied to qualitative and quantitative analysis of molecules and atoms, and analysis of trace substances is limited by signal intensity, so that the demand for a weak signal enhancement method is more and more urgent. Since the intensity of the signal light is proportional to the power of the excitation light, increasing the power of the excitation light is an effective method for increasing the intensity of the signal. But increasing laser power means larger laser volume and weight, increased difficulty in heat dissipation, and higher cost. By utilizing the characteristic that light rays emitted by one focus are converged at the other focus after being reflected by the inner wall of the ellipsoid, a gas or liquid sample is placed in the ellipsoid reflecting mirror, so that the spectral signal of the sample at the focus of the ellipsoid can be enhanced by more than 100 times.
SUMMERY OF THE UTILITY MODEL
The utility model provides an ellipsoid laser reflection focus module utilizes the light that a focus sent to assemble in this characteristic of another focus after the reflection of ellipsoid inner wall, arranges gas or liquid sample inside the ellipsoid speculum in to realize the reinforcing more than 100 times of ellipsoid focus department sample spectral signal.
The technical scheme of the utility model is that: an ellipsoidal laser reflection focusing module.
The utility model discloses a device includes: the device comprises a laser, a first lens, an ellipsoidal reflector, a first hole, a first focus, a second focus, a dichroic mirror, a second lens, a spectrometer, a third lens and a second hole. A gas or liquid sample is placed in the ellipsoidal reflector, laser emitted by a laser is focused on a first focus (passing through a first hole of the ellipsoidal reflector) by a first lens, then reflected by the inner surface of the ellipsoidal reflector and focused on a second focus, and then reflected by the ellipsoidal reflector every time, and the laser is sequentially and alternately focused on the first focus and the second focus. The ellipsoid reflecting mirror is plated with a layer with high reflectivity for laser wavelength. The laser is reflected and focused on the first focus and the second focus for multiple times, and the sample is excited to generate signal light such as a Raman spectrum, a fluorescence spectrum and the like.
For signal light reception at the first focal point: and after the sample signal light at the first focus passes through the first hole and is collimated by the first lens, the sample signal light transmits the dichroic mirror and is focused on the entrance slit of the spectrometer by the second lens. Here, a filter may be inserted between the first lens and the second lens to filter out the laser light. The first lens and the second lens can be replaced by reflectors respectively.
For signal light reception at the second focal point: and after the sample signal light at the second focal point passes through the second hole, the sample signal light is focused on the entrance slit of the spectrograph by the third lens. Here a filter may be inserted between the second aperture and the spectrometer to filter out the laser light. The third lens may be replaced with a mirror, or a multi-piece lens.
The first hole and the second hole can be opened at any position of the ellipsoidal reflector, but the laser reflection is ensured not to be blocked. The laser can be incident along any angle, but the laser is ensured to be focused on the first focus, and the signal light at the first focus and the second focus can be received along any angle.
The ellipsoidal reflector may be made up of two or more mirrors, and may be perforated to transmit a gas or liquid sample, but the perforations are made to ensure that the laser reflection is not blocked. Window sheets can be added at the first hole and the second hole to seal the sample to be detected. The reflectivity of the ellipsoidal reflector to the laser is more than 99.5%, so that the signal light at the first focus and the second focus can be enhanced by more than 100 times.
The beneficial effects of the utility model reside in that:
1. the characteristic that light rays emitted by one focus are reflected by the inner wall of the ellipsoid and then converged at the other focus is utilized, and a gas or liquid sample is placed in the ellipsoid reflecting mirror, so that the spectral signal of the sample at the focus of the ellipsoid is enhanced by more than 100 times. (ii) a
2. The sample to be detected at the detection point can be in a gas state or a liquid state;
3. the ellipsoid reflector can be formed by combining two or more reflectors, and can be provided with an opening for transmitting a gas or liquid sample;
4. the first hole and the second hole can be opened at any position of the ellipsoidal reflector, laser can be incident along any angle, and signal light at the first focus and the second focus can be received along any angle.
Drawings
Fig. 1 is a schematic structural view of a device according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
The first embodiment of the present invention, the device is shown in fig. 1: the device comprises a laser 1, a first lens 2, an ellipsoidal reflector 3, a first hole 4, a first focus 5, a second focus 6, a dichroic mirror 7, a second lens 8 and a spectrometer 9. Laser emitted by the laser 1 is reflected by the dichroic mirror 7 and then focused on a first focus 5 (passing through a first hole 4 of the ellipsoidal reflector 3) by the first lens 2, then reflected by the inner surface of the ellipsoidal reflector 3 and focused on a second focus 6, and then reflected by the ellipsoidal reflector 3 each time, and the laser is sequentially and alternately focused on the first focus 5 and the second focus 6. The ellipsoidal reflector 3 is plated with a layer having a high reflectivity for the laser wavelength. A gas or liquid sample is arranged in the ellipsoidal reflector 3, and laser is reflected and focused for multiple times at the first focus 5 and the second focus 6 to excite the sample to generate signal light such as Raman spectrum, fluorescence spectrum and the like. The sample signal light at the first focus 5 is collimated by the first lens 2 after passing through the first hole 4, then is transmitted through the dichroic mirror 7, and is focused on the entrance slit of the spectrometer 9 by the second lens 8. Here, a filter may be inserted between the first lens 2 and the second lens 8 to filter out the laser light. The first lens 2 and the second lens 8 can be replaced by reflecting mirrors respectively. The first hole 4 can be opened at any position of the ellipsoidal reflector 3, laser can be incident at any angle, but the first hole 4 is ensured not to block the reflection of the laser, and the laser is focused on the first focus 5.
The second embodiment of the present invention, the device is shown in fig. 2: the device comprises a laser 1, a first lens 2, an ellipsoidal reflector 3, a first hole 4, a first focus 5, a second focus 6, a spectrometer 9, a third lens 10 and a second hole 11. Laser emitted by the laser 1 is focused on a first focus 5 (passes through a first hole 4 of the ellipsoidal reflector 3) through the first lens 2, then is reflected by the inner surface of the ellipsoidal reflector 3 and is focused on a second focus 6, and then is reflected by the ellipsoidal reflector 3 each time, and the laser is sequentially and alternately focused on the first focus 5 and the second focus 6. The ellipsoidal reflector 3 is plated with a layer having a high reflectivity for the laser wavelength. A gas or liquid sample is arranged in the ellipsoidal reflector 3, and laser is reflected and focused for multiple times at the first focus 5 and the second focus 6 to excite the sample to generate signal light such as Raman spectrum, fluorescence spectrum and the like. The sample signal light at the second focus 6 is focused on the entrance slit of the spectrometer 9 by the third lens 10 after passing through the second hole 11. Here a filter may be inserted between the second aperture 11 and the spectrometer 9 to filter out the laser light. The third lens 10 may be replaced with a mirror, or a multi-plate lens. The first hole 4 and the second hole 11 can be opened at any position of the ellipsoidal reflector 3, but it is ensured that the laser reflection is not blocked. The laser can be incident at any angle, but it is ensured that the laser is focused at the first focal point 5 and the signal light can be received at any angle at the second focal point 6.
The ellipsoidal reflector 3 may be made of a combination of two or more mirrors, and may be perforated to transmit a gas or liquid sample, but the perforations are made to ensure that the laser reflection is not blocked. Window sheets can be added at the first hole 4 and the second hole 11 to seal the sample to be measured. The reflectivity of the ellipsoidal reflector 3 to the laser is more than 99.5%, so that the signal light at the first focus 5 and the second focus 6 can be enhanced by more than 100 times.
Above, only the preferred embodiment of the present invention is described, but not to limit the present invention in any form, and although the present invention has been disclosed with the preferred embodiment, but not to limit the present invention, any skilled person familiar with the art can make some changes or modifications to equivalent embodiments with equivalent changes within the technical scope of the present invention, but all the technical matters of the present invention do not depart from the technical scope of the present invention.
Claims (12)
1. An ellipsoidal laser reflection focusing module, comprising: the laser device emits laser which passes through the first hole of the ellipsoidal reflector and then focuses on the first focal point, and then the laser is reflected by the ellipsoidal reflector for multiple times and focused on the first focal point and the second focal point, and laser enhancement signals of the sample are generated at the first focal point and the second focal point.
2. The ellipsoidal laser reflection focusing module of claim 1, wherein: the first lens is replaced by a mirror for the purpose of reducing chromatic aberration.
3. The ellipsoidal laser reflection focusing module of claim 1, wherein: in order to achieve the purpose of simultaneously exciting and receiving signal light at the first focus, a dichroic mirror, a second lens and a spectrometer are added, laser emitted by a laser penetrates through a first hole of an ellipsoidal reflecting mirror after being reflected by the dichroic mirror and focused by the first lens and is focused at the first focus, and the signal light at the first focus is collimated by the first lens and is focused at an entrance slit of the spectrometer by the second lens.
4. The ellipsoidal laser reflection focusing module of claim 1, wherein: in order to achieve the purpose of separating excitation and receiving, a spectrometer, a third lens and a second hole are added, and signal light at a second focus is received by the third lens and then focused on a slit at the entrance of the spectrometer.
5. The ellipsoidal laser reflection focusing module of claim 1, wherein: in order to achieve the purpose of reducing the processing difficulty, the ellipsoidal reflector 3 is formed by combining 2-10 ellipsoidal reflectors.
6. The ellipsoidal laser reflection focusing module of claim 1, wherein: the sample inside the ellipsoidal reflector is gas or liquid.
7. The ellipsoidal laser reflection focusing module of claim 1, wherein: to achieve the purpose of real-time analysis of the sample, the openings of the ellipsoidal reflector are used for transmitting gas or liquid samples.
8. The ellipsoidal laser reflection focusing module of claim 1 or claim 4, wherein: in order to achieve the purpose of improving the sensitivity, the third lens is replaced by a lens group consisting of 2 to 20 lenses.
9. The ellipsoidal laser reflection focusing module of claim 1 or claim 4, wherein: in order to achieve the purpose of sealing the sample, sealing window sheets are arranged at the first hole and the second hole of the ellipsoid reflecting mirror.
10. The ellipsoidal laser reflection focusing module of claim 1 or claim 4, wherein: on the premise of not blocking laser reflection, the first hole and the second hole are formed at any positions of the ellipsoidal reflector.
11. The ellipsoidal laser reflection focusing module of claim 1, wherein: the laser light is incident from an arbitrary direction on the premise of focusing on the first focal point.
12. The ellipsoidal laser reflection focusing module of claim 1 or claim 4, wherein: the signal light at the first focus and the second focus is received along an arbitrary angle.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324365A (en) * | 2022-01-10 | 2022-04-12 | 合肥御微半导体技术有限公司 | Curved surface detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324365A (en) * | 2022-01-10 | 2022-04-12 | 合肥御微半导体技术有限公司 | Curved surface detection device |
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