WO2019109772A1 - Light-scattering confocal excitation and collection system - Google Patents

Light-scattering confocal excitation and collection system Download PDF

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Publication number
WO2019109772A1
WO2019109772A1 PCT/CN2018/114414 CN2018114414W WO2019109772A1 WO 2019109772 A1 WO2019109772 A1 WO 2019109772A1 CN 2018114414 W CN2018114414 W CN 2018114414W WO 2019109772 A1 WO2019109772 A1 WO 2019109772A1
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light
focus
optical
collection system
reflecting
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PCT/CN2018/114414
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French (fr)
Chinese (zh)
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黄保坤
朱琳
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深圳海纳光科技有限公司
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Publication of WO2019109772A1 publication Critical patent/WO2019109772A1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47Scattering, i.e. diffuse reflection
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0208Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28Investigating the spectrum
    • G01J3/44Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65Raman scattering

Definitions

  • the present invention relates to the field of optics, and in particular to a light scattering confocal excitation collection system.
  • the material When light interacts with matter, the material emits light-scattering signals, such as Raman scattering signals, Rayleigh scattering signals, Brillouin scattering signals, and so on.
  • light-scattering signals such as Raman scattering signals, Rayleigh scattering signals, Brillouin scattering signals, and so on.
  • an excitation source When an excitation source is used to excite a transparent sample, such as a gas, a solution, etc., since most of the source energy passes through the transparent sample, there is no interaction with the transparent sample, resulting in inefficient use of the excitation source.
  • the light scattering signal emitted by the transparent sample is a signal transmitted to the stereoscopic space, and the light scattering signal scattered to the stereoscopic space is sufficiently collected to improve the collection efficiency and improve the signal intensity and the signal-to-noise ratio.
  • the method of arranging multiple acquisition probes can improve the light scattering signal collection efficiency, but can not improve the use efficiency of the incident excitation light source, and the instrument is bulky and expensive.
  • the present invention is intended to provide a light scattering confocal excitation collection system that can fully utilize the energy of the excitation source and improve the light scattering in the case of only one set of collection systems. Signal collection efficiency.
  • the scattered light collecting system of the present invention is not limited to the case where the scattered light is collected in the case where the target light is excited by the laser.
  • the excitation light is not limited to the laser light, and secondly, the excitation light can be omitted.
  • the scattered light confocal excitation collection system of the present invention can be applied in various environments where light collection is required.
  • the present invention provides a light scattering confocal excitation collection system, comprising: 2N optical reflection devices, wherein N is a natural number greater than or equal to 1, and divergent light from a device focus is in the first optical After being reflected by the reflective device, it can be reflected by at least a portion of the remaining optically reflective devices, and at least once again through the focus of the device, 2N optical reflective devices having the same device focus; 2N optical reflective devices comprising N steering optical reflections a device and N converging optical reflecting devices, each of said steering optical reflecting devices for reflecting light from said device focus to one of N converging optical reflecting devices, each converging optical reflecting device for coming from A light that turns to the optical reflective device is reflected toward the device focus and through the device focus to the next steering optical reflective device.
  • the optical reflective device is a diagonally reflective optical reflective device having a focus at the focus of the device, wherein each steering optical reflective device reflects divergent light from the device focus into parallel light incident into the N converging optical reflective devices One, each converging optical reflecting device is used to concentrate light from the last turning optical reflecting device to the device focus and to be incident through the device focus to the next turning optical reflecting device.
  • the light scattering confocal excitation collection system further comprises terminal reflection optics, the terminal reflection optics receiving the reflected light of the last converging optical reflection device passing through the focus of the device, and concentrating the reflected light to the The focus of the device.
  • each of said optically reflective devices is arranged around said device focus arrangement to form said light scattering confocal excitation collection system and to reserve a laser entrance.
  • the light scattering confocal excitation collection system further comprises an incident light concentrating device through which the laser light incident through the laser entrance is concentrated to the device focus.
  • the terminal reflection optics comprising an optical conversion device having a focus at the focus of the device and a terminal offset mirror
  • the optical conversion device converts incident laser light from the last converging optical reflection device into parallel light incident to the terminal offset mirror by transmission or reflection, the terminal offset mirror being opposite to the optical conversion device Having a horizontal offset such that laser light incident at the first position of the terminal offset mirror exits from the second position of the terminal offset mirror.
  • the working process of the confocal excitation collecting system of the present invention is as follows: the excitation light source and the light scattering signal emitted by the device focus or passing through the device focus are transmitted to the optical reflecting device (preferably the oblique reflecting optical device), and then reflected by the optical reflecting device to the next one.
  • the optical reflective device is reflected, concentrated, or focused by the next optical reflective device to the device focus.
  • the excitation light source and the light scattering signal focused by the optical reflection device to the focus of the device are transmitted to the next optical reflection device, the terminal reflection optical device or the source reflection optical device, etc. through the device focus or transmitted to the light scattering confocal excitation collection system.
  • the excitation light source of the incident light scattering confocal excitation collection system is irradiated to the first optical reflection device after passing through the focus of the device, and is reflected by the first optical reflection device to the second optical reflection device, and is focused by the second optical reflection device.
  • the device is focused and then reaches the third optically reflective device until the 2Nth optical reflective device focuses the excitation source to the device focus and exits the light scattering confocal excitation collection system.
  • the number of optical reflective devices is 1, 2, 3...2N in the order in which the excitation light source enters the light scattering confocal excitation collection system.
  • the excitation source is focused N times by the optical reflective device to the device focus. If the last optical reflection device is unable to focus the excitation source to the device focus, then the optical reflection device is not included in the light scattering confocal excitation collection system.
  • Excitation light sources include, but are not limited to, lasers, halogen lamps, gas discharge luminescence, illumination of light-emitting diodes, illumination of electroluminescent lamps, and the like, and combinations of excitation sources described above.
  • Light scatter signals include, but are not limited to, Raman scatter signals, fluorescence scatter, Brillouin scatter signals, Rayleigh scatter signals, Compton scatter signals, Mie scattering signals, and the like, and combinations of the signals described above.
  • the optical reflecting device, the source optical reflecting device, and the terminal optical reflecting device may be an optical component or a combination of a plurality of optical components, and the 2N oblique reflecting optical devices may be the same optical device or different optical devices.
  • two optical reflecting devices may share an optical device, that is, the excitation light source and the light scattering signal are irradiated to a region of an optical reflecting device through the focus of the device, and then reflected by the optical reflecting device to another region thereof, and then focused to the device. focus.
  • the terminal reflection optics refers to an optical device that acts on the excitation light source and the light scattering signal, that is, the excitation light source that is reflected by the 2Nth optical reflection device through the device focus to the end reflection optics, and the light scattering signal is reflected through the device focus. 2N oblique reflecting optics.
  • the terminal reflective optics can be an optical component or a combination of multiple optical components.
  • the excitation source and the light scattering signal may pass through the terminal reflection optics one or more times.
  • the source reflection optics refers to an optical device that acts on the excitation light source and the light scattering signal, that is, the excitation light source that reflects the first optical reflection device through the device focus to the source reflection optics, and the light scattering signal reflects through the device.
  • the focus reaches the first oblique reflecting optics.
  • the device focus refers to a small range near the focus of each optical reflection device, and the light scattering signal emitted to the terminal reflection optics and the source reflection optics is reflected back to the focus by the terminal reflection optics and the source reflection optics, and is transmitted to the 2M.
  • the light scattering signal of the oblique reflecting optics is reflected by the 2M oblique reflecting optics to the 2M-1 oblique reflecting optics, and then reflected back to the focus by the 2M-1 oblique reflecting optics, and transmitted to the 2M-1
  • the light scattering signals of the oblique reflecting optics are reflected by the 2M-1 oblique reflecting optics to the 2M oblique reflecting optics, and then reflected back to the focus by the 2M oblique reflecting optics.
  • M is a natural number greater than or equal to 1 and less than or equal to N.
  • the excitation light source emitted from the emitting device of the excitation light source excites the light scattering signal of the sample located at the focus of the device after passing through the focus of the device by the oblique reflecting optical device, the terminal reflecting optical device, and the source
  • the end reflection optics are collected, transmitted to the analysis device and the conversion device, and processed and recorded by the data processing device.
  • Analytical devices include, but are not limited to, monochromators, spectrometers, interferometers, and the like, and combinations of the above.
  • the conversion device refers to a device that can record a light scattering signal or convert the light into electric, magnetic, acoustic, force, heat, etc., including but not limited to a photocoupler, a photomultiplier tube, an oscilloscope, a thermocouple, and the like. , and a combination of the above devices.
  • Data processing equipment includes, but is not limited to, data processing equipment such as computers, printers, oscilloscopes, mobile phones, and the like.
  • divergence light from the focus of the device refers to the light emitted by the device focus as the emission center or concentrated to the focus of the device and transmitted through the focus of the device. That is, the divergent light includes a variety of light or laser light that can be considered to be emitted from the focus of the device.
  • optical reflection device is not limited to an optical device which is independently constructed, and may also mean an optical device composed of a plurality of components.
  • the light-scattering confocal excitation collecting system of the present invention can efficiently utilize the energy of the excitation light source when the scattering signal of the transparent sample is excited by the excitation light source, and the light scattering signal is also collected by 2N optical reflection devices and transmitted to Specific direction. After the addition of the terminal reflection optics and the source reflection optics, the utilization efficiency of the excitation source is further improved even when the light scattering confocal excitation collection system forms an oscillation to multiply the use efficiency of the excitation source.
  • the light scattering confocal excitation collection system is capable of repeatedly focusing the excitation light source on the device focus through a plurality of optical devices, fully utilizing the energy of the excitation light source, exciting the light scattering signal of the sample located at the focus of the device, and being able to locate the device at the same time. Focused sample scattering efficiently collects light scattering signals into the stereo space.
  • FIG. 1 is a schematic plan view showing the planar structure of a confocal excitation collecting system according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a three-dimensional structure of another embodiment of the present invention.
  • 1.1-1. (2N) represents oblique reflecting optics
  • 2 represents device focus
  • 3 represents terminal reflective optics
  • 4 represents source reflective optics.
  • FIG. 3 is a schematic diagram of an optical path of incident light in a confocal excitation collection system according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an optical path of scattered light in a confocal excitation collection system according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of an optical path of light emitted from a confocal excitation collection system in an embodiment of the present invention
  • Fig. 6 shows an example in which the steering optical reflection device 1. (2M-1) and the converging optical reflection device 1. (2M) employ the same optical device.
  • Fig. 7 shows an example in which different optical devices are employed for the steering optical reflecting device 1. (2M-1) and the converging optical reflecting device 1. (2M).
  • Fig. 8 shows an example in which a combination of a concave mirror and a plane mirror is employed as a steering optical reflection device.
  • Fig. 9 shows an example in which a combination of a convex lens mirror and a plane mirror is used as a steering optical reflecting device and a collecting optical device, respectively.
  • 10, 11, 12, 13, and 14 are light scattering confocal excitation collection systems having a combination of one, two, three, four, and five sets of turning optical reflecting devices and converging optical reflecting devices, respectively.
  • Figure 15 shows an application example of the confocal excitation collection system of the present invention.
  • FIG. 1 An example using a concave mirror as a terminal reflection device or a source reflection device is shown in FIG.
  • FIG. 1 An example in which a combination of a lens and a mirror is employed as a terminal reflection device or a source reflection device is shown in FIG.
  • FIG. 18 A combination of a concave mirror and a mirror is shown in Fig. 18 as an example of a terminal reflection device or a source reflection device.
  • FIG. 1 An example in which a combination of a lens and a right angle mirror is employed as the terminal reflective element module or the source reflective element module is shown in FIG.
  • FIG. 1 A complete optical path diagram using a combination of a lens and a right angle mirror as a terminal reflective element module and a source reflective element module is shown in FIG.
  • FIG. 1 is a schematic plan view showing the structure of a light scattering confocal excitation collection system according to an embodiment of the present invention.
  • 1.1 to 1. (2N) denotes an optical reflection device for performing reciprocal reflection, and oblique reflection optics are employed in this embodiment.
  • 2 denotes the device focus, 3 denotes the terminal reflection optics, and 4 denotes the source reflection optics.
  • the light scattering confocal excitation collection system comprises 2N optical reflection devices 1, wherein N is a natural number greater than or equal to 1, 2N optical reflection devices 1 have the same focus 2, referred to herein as device focus, and divergent light from device focus 2 After being reflected by the first optical reflecting device, it can be reflected by the remaining optical reflecting devices in turn and at least once again through the device focus 2.
  • the center of the source-side reflection optics 4 is provided with an entrance port or an entrance aperture (which may also be eccentrically disposed), and the laser is incident on the light-scattering confocal excitation through the entrance aperture.
  • the incident laser is incident on the device focus 2 and illuminates the sample at the device focus 2.
  • the system of the invention is primarily directed to a transparent or translucent sample design
  • some or all of the sample is transmitted through the sample at the focus 2 of the device and further incident on the first oblique reflecting optic 1.1, the oblique The reflective optics 1.1 is a steering optical reflector 1.1.
  • the steering optical reflecting device 1.1 employs a plane mirror that directly reflects the laser light incident thereon to the collecting optical reflecting device 1.2. If the laser light incident on the steering optical reflecting device 1.1 is divergent light, the steering optical reflecting device 1.1 employs a parabolic mirror that converts the divergent light into parallel light to be reflected to the converging optical reflecting device 1.2.
  • the focus is incident at the position of the device focus 2, so that the laser light transmitted from the device focus 2 is divergent light, and the steering optical reflecting device 1.1 adopts a parabolic mirror whose focus is at the focus 2 of the device, and the divergent laser reaches the steering optics.
  • the converging optical reflecting device 1.2 After the reflective device 1.1 is converted into parallel light, incident on the converging optical reflecting device 1.2, the converging optical reflecting device 1.2 receives the parallel incident laser light and re-converges the laser light to the device focus 2, and the diverging laser light exiting from the device focus 2 continues Shooting to the next turning optical reflecting device, and so on, until the laser is incident on the terminal reflecting optics 3, and the terminal reflecting optics 3 is mounted downstream of the even number of oblique reflecting optics, that is, the optical path of the collecting optical reflecting device Downstream.
  • the terminal reflection optics 3 are mounted downstream of the optical path of the sixth oblique reflection optics, ie, the third converging optical reflection device, which is disposed opposite to the focus of the third convergent optical reflection device with respect to the device focus 2,
  • the terminal reflection optics 3 are used to reflect and re-converge light emitted from the device focus 2 or equivalent from the device focus 2 at the device focus 2.
  • the terminal reflective optics 3 can be a spherical mirror with a focus at the device focus 2.
  • the optical reflective device 1.2 receives the parallel incident signal light and reconverges the signal light to the device focus 2, the signal light emerging from the device focus 2 continues to be directed to the next steering optical reflective device, and so on, up to the signal light Incident on the end face reflecting optics 3, the end face reflecting optics 3 reflects and reconverges the signal light at the device focus 2, i.e., returns along the original path, and finally exits from the source end reflecting optics 4.
  • FIG. 2 is a schematic diagram of a three-dimensional structure of another embodiment of the present invention.
  • the three-dimensional structure of the confocal excitation collection system is more clearly shown.
  • the figure in order to more clearly represent the individual devices, only two sets of steering reflective optics 1.1, 1.3 and converging reflective optics 1.2, 1.4 are shown.
  • the light scattering confocal excitation collection system adds a terminal reflection device, and the terminal reflection device receives the laser light from the device focus 2 or the signal light from the device focus 2 of the last convergence optical reflection device. And reflect the received optical path back.
  • the terminal reflective device may be omitted, that is, the device that reflects the laser and signal light back through the terminal reflective device is not provided.
  • the terminal reflection optics causes the excitation light reflected by the 2Nth oblique reflection optics to be focused to the focus to reach the source reflection optics, and then reflected by the terminal reflection optics to focus and then to the 2N oblique reflection optics,
  • the 2N oblique reflecting optics are reflected to the 2N-1 oblique reflecting optics, and so on, until the excitation light is reflected by the first oblique reflecting optics to focus, and then exits the light scattering confocal excitation collecting system.
  • the excitation light exits from the light-scattering confocal excitation collection system to the light-scattering confocal excitation collection system, focusing to focus at 2N+1 times.
  • the terminal reflective optics further causes the light scattering signal reflected by the 2Nth oblique reflective optic to pass through the focus to the terminal reflective optic, and after being reflected by the terminal reflective optics along the light scattering signal of the focus scattering toward the end reflecting optic Aiming at the 2N oblique reflecting optics, reflected by the 2N oblique reflecting optics to the 2N-1 oblique reflecting optics, and so on, until the light scattering signal is reflected by the first oblique reflecting optics through the focus An out-of-light scattering confocal excitation collection system is emitted.
  • Light scattering signals emitted to 2N oblique reflecting optics (or even to an even number of oblique mirrors) and terminal reflective optics are reflected by the first oblique reflecting optic after passing through the focus after adding the end reflecting optics
  • An out-of-light scattering confocal excitation collection system is emitted.
  • the source-reflecting optical device 4 causes the light-scattering signal reflected by the first oblique-reflecting optical device to pass through the focus to the source-side reflecting optical device, and then reflected by the source-reflecting optical device through the focus and then directed to the first oblique reflecting optical device.
  • the optical device reflects the focus to the focus and exits the light scattering confocal excitation collection system.
  • the light-scattering signal emitted to the 2N oblique reflecting optics is reflected by the 2N oblique reflecting optics after passing through the focus after the source-side reflecting optics is added, and then exits the light-scattering confocal excitation collecting system.
  • the terminal reflection optics and the source reflection optics cooperate to cause the excitation light source reflected by the 2Nth oblique reflection optics to focus on the focus to reach the terminal reflection optics, and the end reflection optics reflect the focus to the focus and then shoot.
  • the 2N oblique reflection optics until the excitation light source is reflected by the first oblique reflection optics to focus, and then reaches the source reflection optics, and then reflected by the source reflection optics to focus to the first oblique
  • the optics are reflected until the excitation source is reflected by the 2N oblique reflective optics to focus and then reaches the end reflecting optics, causing the excitation source to oscillate in the light scattering confocal excitation collection system.
  • 2N oblique reflecting optics, end reflecting optics, and source reflecting optics have one or more optics that can reflect the excitation source, transmitting the light scattering signal, the excitation source oscillates in the light scattering confocal excitation collection system
  • the light scattering signal excited by the sample at the focus is emitted by the light scattering confocal excitation collection system by one or several component modules of the transmission and scattering signal.
  • each steering optical reflecting device is capable of reflecting light from the device focus 2 toward one of the plurality of converging optical reflecting devices
  • each converging optical reflecting device is capable of reflecting light from the last turning optical reflecting device. It is (preferably concentrated) to the device focus 2 and incident on the next steering optical reflecting device.
  • FIG. 1 An optical path diagram of the excitation light incident into the light scattering confocal excitation collection system in another embodiment is shown in FIG.
  • the excitation light incident on the light-scattering confocal excitation collection system is irradiated to the first oblique reflection optics 1.1 (used as a steering optical reflection device) after being focused on the device focus 2, and is deflected by the first
  • the optical device 1.1 is reflected to the second oblique reflecting optics 1.2 (used as a converging optical reflecting device), is focused by the second oblique reflecting optics 1.2 to the focus 2, and then reaches the third oblique reflecting optics 1.3 until the 2N An oblique reflective optic 1.
  • (2N) emits a light-scattering confocal excitation collection system after focusing the excitation source to focus.
  • the terminal reflection device is not employed.
  • FIG. 4 is a schematic illustration of an optical path of scattered light emitted by a sample in the collection system of the embodiment of Figure 3.
  • the light scattering signal emitted by the sample located at the focus 2 to the stereoscopic space is scattered to the first, third, fifth, etc. collectively referred to as the 2M-1 oblique reflecting optical device 1.
  • M is a natural number between 1 and N.
  • (2M-1) to the 2M oblique reflecting optics 1.
  • (2M) reflected by the 2M oblique reflecting optics 1.
  • (2M) through the device focus 2, then reach the 2M+1 oblique reflection optics 1. (2M + 1), until the light scattering signal is reflected by the 2N oblique reflection optics 1.
  • (2N) after the focus 2 out of the light scattering confocal excitation Collection system.
  • FIG. 5 is a view showing another optical path of the scattered light emitted from the sample in the collecting system of the embodiment shown in FIG. 3, the light scattering signal emitted from the sample located in the focus 2 to the stereoscopic space is irradiated to the second, 4,6.... etc. collectively referred to as the 2M oblique reflecting optics 1.
  • (2M) reflected by the 2M oblique reflecting optics 1.
  • (2M) to the 2M-1 oblique reflecting optics 1.
  • (2M-1 ) reflected by the 2M-1 oblique reflection optics 1.
  • 2M-1 after the focus reaches the 2M-2 oblique reflection optics 1.
  • 2M-2) until the light scattering signal is from the first
  • a light scattering confocal excitation collecting system is emitted through the focus 2.
  • Figure 6 shows the use of a combination of a steering reflective optic and a converging reflective optic.
  • the combination of a convex lens and a planar mirror is used in place of a parabolic mirror to effect the function of the steering reflective optics.
  • a combination of a convex lens and a planar mirror is used in place of the parabolic mirror to effect steering and converging reflective optics.
  • Convex lenses are used to convert divergent light from the focus into parallel light, while planar mirrors are used for steering.
  • Fig. 8 shows the case where a plane mirror for relaying is added when the steering and the concentrated reflecting optics are not suitable for direct optical path communication.
  • 10, 11, 12, 13, and 14 are light scattering confocal excitation collection systems having a combination of 1 set, 2 sets, 3 sets, 4 sets, 5 sets of turning optical reflecting devices and converging optical reflecting devices, respectively.
  • the operation of these light-scattering confocal excitation collection systems is similar to the embodiment of Figures 1 and 3, using odd-numbered oblique optical mirrors as steering optics, with even-numbered oblique-reflecting optics as converging optics. Device. Therefore, it will not be described in detail here.
  • Figure 15 shows an example of the application of the confocal excitation collection system of the present invention in a Raman spectrometer. As shown in FIG. 15, it includes an excitation light source 5, an analysis device 6, a conversion device 7, and a data processing device 8.
  • the excitation light emitted by the excitation light source 5 passes through the device focus 2 to excite the light scattering signal of the sample located at the device focus 2, and the light scattering signal is collected by the confocal excitation collection system in the above embodiment, and then collected by the source reflection optics 4 ( For example, it is returned to the analysis device 6 and the conversion device 7 through the laser entrance hole on the source reflection device, and is transferred to the analysis device 6 and the conversion device 7, and processed and recorded by the data processing device.
  • both the terminal reflective device and the source reflective device are of an offset configuration.
  • the source-side reflection device employs a source-end deflection mirror having a laser entrance port on the source-side deflection mirror, and the excitation light enters the collection system through the entrance port to illuminate the focus of the device.
  • the offset mirror is characterized in that light incident from the first position to the offset mirror can be reflected from the second position of the offset mirror, and the outgoing direction is opposite to the incident direction, and the outgoing light and the incident light are emitted. Parallel to each other only the two have horizontal displacement.
  • the offset mirror adopts a right angle mirror, and the two inner sides of the right angle mirror are two mirrors, and the incident light incident on the first side of the right angle mirror is reflected by the first side, and is from a right angle. The second side of the mirror exits.
  • a light entrance hole for exciting light is disposed between both sides of the right angle mirror.
  • the offset reflection is used in combination with the collection system of the present invention in Figure 20 to achieve more focus and signal enhancement.
  • the source-side reflective device further includes a focusing lens having a focus at the focus 2 of the device for focusing the incident excitation light.
  • the terminal reflective device includes an optical conversion device (such as a convex lens) having a focus at the device focus 2 and a terminal offset mirror that converts incident laser light from the last concentrated optical reflective device into parallel light by transmission or reflection.
  • an optical conversion device such as a convex lens
  • the terminal offset mirror having a horizontal offset with respect to the optical conversion device (ie, the center of the terminal offset mirror is not opposite the optical axis of the convex lens in the figure) to cause the incident to be offset at the terminal
  • the laser at the first position of the mirror exits from the second position of the terminal offset mirror.

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Abstract

A light-scattering confocal excitation and collection system, comprising: 2N optical reflecting devices, wherein the 2N optical reflecting devices have the same focus (2); after being reflected by a first optical reflecting device, scattered light from the focus (2) can be sequentially reflected by the remaining optical reflecting devices and passes through the focus (2) at least once again. The system allows an excitation light source to be repeatedly reflected many times by several optical devices and even to be focused on the focus (2), thereby increasing the utilization efficiency of the excitation light source, and can also efficiently collect a light-scattering signal emitted from the focus (2) to a stereoscopic space.

Description

光散射共焦激发收集系统Light scattering confocal excitation collection system
相关申请Related application
本申请主张于2017年12月7日提交的、名称为“光散射共焦激发收集系统”的中国发明专利申请:201711287351.5的优先权。The present application claims priority to Chinese Patent Application No. 201711287351.5, filed on Dec. 7, 2017, entitled "Light Scattering Confocal Excitation Collection System".
技术领域Technical field
本发明涉及光学领域,具体涉及一种光散射共焦激发收集系统。The present invention relates to the field of optics, and in particular to a light scattering confocal excitation collection system.
背景技术Background technique
当光与物质发生相互作用的时候,物质会发出光散射信号,例如拉曼散射信号,瑞利散射信号,布里渊散射信号等。When light interacts with matter, the material emits light-scattering signals, such as Raman scattering signals, Rayleigh scattering signals, Brillouin scattering signals, and so on.
当使用激发光源去激发透明样品,例如气体、溶液等的时候,由于绝大部分光源能量都透过透明样品,没有与透明样品发生相互作用而导致激发光源使用效率低下。When an excitation source is used to excite a transparent sample, such as a gas, a solution, etc., since most of the source energy passes through the transparent sample, there is no interaction with the transparent sample, resulting in inefficient use of the excitation source.
而透明样品发出的光散射信号是向立体空间发射的信号,将散射向立体空间的光散射信号充分收集才能提高收集效率,提高信号强度和信噪比。The light scattering signal emitted by the transparent sample is a signal transmitted to the stereoscopic space, and the light scattering signal scattered to the stereoscopic space is sufficiently collected to improve the collection efficiency and improve the signal intensity and the signal-to-noise ratio.
布置多个采集探头的方法可以提高光散射信号收集效率,但是无法提高入射激发光源的使用效率,而且会导致仪器体积庞大,成本昂贵。The method of arranging multiple acquisition probes can improve the light scattering signal collection efficiency, but can not improve the use efficiency of the incident excitation light source, and the instrument is bulky and expensive.
因此,实际上现有技术中用于提高光散射信号的方式都效率低下、难以推广。Therefore, in practice, the methods used to improve the light scattering signal in the prior art are inefficient and difficult to generalize.
发明内容Summary of the invention
针对现有技术中存在的上述问题,本发明希望提供一种光散射共焦激发收集系统,其在仅一套收集系统的情况下,既可以充分的利用激发光源的能量,又可以提高光散射信号的收集效率。In view of the above problems in the prior art, the present invention is intended to provide a light scattering confocal excitation collection system that can fully utilize the energy of the excitation source and improve the light scattering in the case of only one set of collection systems. Signal collection efficiency.
当然,本发明的散射光收集系统不仅限于在下述场景:利用激光对目标光进行激发情况下的散射光收集。首先激发光不仅限于激光,其次,可以省略激发光。本发明的散射光共焦激发收集系统可以应用在各种需要对光进行收集的环境下。Of course, the scattered light collecting system of the present invention is not limited to the case where the scattered light is collected in the case where the target light is excited by the laser. First, the excitation light is not limited to the laser light, and secondly, the excitation light can be omitted. The scattered light confocal excitation collection system of the present invention can be applied in various environments where light collection is required.
具体而言,本发明提供一种光散射共焦激发收集系统,其特征在于,包括:2N个光学反射器件,其中N为大于等于1的自然数,来自设备焦点的发散光在被第一 个光学反射器件反射后,能够依次被其余光学反射器件中的至少部分反射,并至少再一次通过所述设备焦点,2N个光学反射器件具有同一个设备焦点;2N个光学反射器件包括N个转向光学反射器件以及N个汇聚光学反射器件,每个所述转向光学反射器件用于将来自所述设备焦点的光反射向N个汇聚光学反射器件中的一个,每个汇聚光学反射器件用于将来自上一个转向光学反射器件的光反射向所述设备焦点并穿过所述设备焦点入射至下一个转向光学反射器件。In particular, the present invention provides a light scattering confocal excitation collection system, comprising: 2N optical reflection devices, wherein N is a natural number greater than or equal to 1, and divergent light from a device focus is in the first optical After being reflected by the reflective device, it can be reflected by at least a portion of the remaining optically reflective devices, and at least once again through the focus of the device, 2N optical reflective devices having the same device focus; 2N optical reflective devices comprising N steering optical reflections a device and N converging optical reflecting devices, each of said steering optical reflecting devices for reflecting light from said device focus to one of N converging optical reflecting devices, each converging optical reflecting device for coming from A light that turns to the optical reflective device is reflected toward the device focus and through the device focus to the next steering optical reflective device.
优选地,所述光学反射器件为焦点位于所述设备焦点的斜反射光学反射器件,其中,每个转向光学反射器件将来自设备焦点的发散光反射成平行光入射至N个汇聚光学反射器件中的一个,每个汇聚光学反射器件用于将来自上一个转向光学反射器件的光汇聚至所述设备焦点并穿过所述设备焦点入射至下一个转向光学反射器件。Preferably, the optical reflective device is a diagonally reflective optical reflective device having a focus at the focus of the device, wherein each steering optical reflective device reflects divergent light from the device focus into parallel light incident into the N converging optical reflective devices One, each converging optical reflecting device is used to concentrate light from the last turning optical reflecting device to the device focus and to be incident through the device focus to the next turning optical reflecting device.
优选地,所述光散射共焦激发收集系统还包括终端反射光学器件,所述终端反射光学器件接收最后一个汇聚光学反射器件穿过所述设备焦点的反射光,并将该反射光汇聚至所述设备焦点。Preferably, the light scattering confocal excitation collection system further comprises terminal reflection optics, the terminal reflection optics receiving the reflected light of the last converging optical reflection device passing through the focus of the device, and concentrating the reflected light to the The focus of the device.
优选地,各个所述光学反射器件围绕所述设备焦点布置构成所述光散射共焦激发收集系统,并且预留出激光入射口。Preferably, each of said optically reflective devices is arranged around said device focus arrangement to form said light scattering confocal excitation collection system and to reserve a laser entrance.
优选地,所述光散射共焦激发收集系统还包括入射光汇聚器件,经激光入射口入射的激光通过所述入射光汇聚器件汇聚至所述设备焦点。Preferably, the light scattering confocal excitation collection system further comprises an incident light concentrating device through which the laser light incident through the laser entrance is concentrated to the device focus.
优选地,还包括源端偏移反射镜,所述源端偏移反射镜的上具有激光入射口,所述终端反射光学器件包括焦点位于所述设备焦点的光学转换器件以及终端偏移反射镜,所述光学转换器件通过透射或反射方式将来自最后一个汇聚光学反射器件的入射激光转换成平行光入射至所述终端偏移反射镜,所述终端偏移反射镜相对于所述光学转换器件具有水平偏移,以使得入射在所述终端偏移反射镜第一位置的激光从所述终端偏移反射镜的第二位置出射。Preferably, further comprising a source-end deflection mirror having a laser entrance port thereon, the terminal reflection optics comprising an optical conversion device having a focus at the focus of the device and a terminal offset mirror The optical conversion device converts incident laser light from the last converging optical reflection device into parallel light incident to the terminal offset mirror by transmission or reflection, the terminal offset mirror being opposite to the optical conversion device Having a horizontal offset such that laser light incident at the first position of the terminal offset mirror exits from the second position of the terminal offset mirror.
本发明的共焦激发收集系统的工作过程如下:由设备焦点发出或者经过设备焦点的激发光源和光散射信号,传输到光学反射器件(优选斜反射光学器件)后,由光学反射器件反射向下一个光学反射器件,并由下一个光学反射器件反射向、汇聚或聚焦到设备焦点。由光学反射器件聚焦到设备焦点的激发光源和光散射信号,经过设备焦点后传输向下一个光学反射器件、终端反射光学器件或源端反射光学器件等或者传输出光散射共焦激发收集系统。The working process of the confocal excitation collecting system of the present invention is as follows: the excitation light source and the light scattering signal emitted by the device focus or passing through the device focus are transmitted to the optical reflecting device (preferably the oblique reflecting optical device), and then reflected by the optical reflecting device to the next one. The optical reflective device is reflected, concentrated, or focused by the next optical reflective device to the device focus. The excitation light source and the light scattering signal focused by the optical reflection device to the focus of the device are transmitted to the next optical reflection device, the terminal reflection optical device or the source reflection optical device, etc. through the device focus or transmitted to the light scattering confocal excitation collection system.
射入光散射共焦激发收集系统的激发光源经过设备焦点后照射到第1个光学反射器件,由第1个光学反射器件反射到第2个光学反射器件,由第2个光学反射器件聚焦到设备焦点,然后到达第3个光学反射器件,直到第2N个光学反射器件将激发光源聚焦到设备焦点后出射出光散射共焦激发收集系统。光学反射器件的编号根据激发光源进入光散射共焦激发收集系统所经过的次序依次为1,2,3…2N。在此过程中,激发光源N次由光学反射器件聚焦到设备焦点,若最后一个光学反射器件不能将激发光源聚焦到设备焦点,则此光学反射器件不包含在光散射共焦激发收集系统中。The excitation light source of the incident light scattering confocal excitation collection system is irradiated to the first optical reflection device after passing through the focus of the device, and is reflected by the first optical reflection device to the second optical reflection device, and is focused by the second optical reflection device. The device is focused and then reaches the third optically reflective device until the 2Nth optical reflective device focuses the excitation source to the device focus and exits the light scattering confocal excitation collection system. The number of optical reflective devices is 1, 2, 3...2N in the order in which the excitation light source enters the light scattering confocal excitation collection system. During this process, the excitation source is focused N times by the optical reflective device to the device focus. If the last optical reflection device is unable to focus the excitation source to the device focus, then the optical reflection device is not included in the light scattering confocal excitation collection system.
激发光源包括但不限于激光、卤素灯光、气体放电发光、发光二级管的发光、场致发光灯的发光等,及以上所述激发光源的组合。Excitation light sources include, but are not limited to, lasers, halogen lamps, gas discharge luminescence, illumination of light-emitting diodes, illumination of electroluminescent lamps, and the like, and combinations of excitation sources described above.
光散射信号包括但不限于拉曼散射信号、荧光散射、布里渊散射信号、瑞利散射信号、康普顿散射信号、米氏散射信号等,及以上所述信号的组合。Light scatter signals include, but are not limited to, Raman scatter signals, fluorescence scatter, Brillouin scatter signals, Rayleigh scatter signals, Compton scatter signals, Mie scattering signals, and the like, and combinations of the signals described above.
光学反射器件、源端光学反射器件、终端光学反射器件可以是一个光学元件,也可以是多个光学元件的组合,2N个斜反射光学器件可以是相同的光学器件,也可以是不同的光学器件。也可以两个光学反射器件共用一个光学器件,即激发光源、光散射信号经过设备焦点照射到一个光学反射器件一个区域,再由这个光学反射器件反射到其另一个区域,然后再被聚焦到设备焦点。The optical reflecting device, the source optical reflecting device, and the terminal optical reflecting device may be an optical component or a combination of a plurality of optical components, and the 2N oblique reflecting optical devices may be the same optical device or different optical devices. . It is also possible for two optical reflecting devices to share an optical device, that is, the excitation light source and the light scattering signal are irradiated to a region of an optical reflecting device through the focus of the device, and then reflected by the optical reflecting device to another region thereof, and then focused to the device. focus.
终端反射光学器件,指对激发光源和光散射信号起到下述作用的光学器件,即将由第2N个光学反射器件反射经过设备焦点到达端反射光学器件的激发光源、光散射信号反射经过设备焦点到达第2N个斜反射光学器件。终端反射光学器件可以是一个光学元件,也可以是多个光学元件的组合。激发光源、光散射信号可以一次或者多次经过终端反射光学器件。The terminal reflection optics refers to an optical device that acts on the excitation light source and the light scattering signal, that is, the excitation light source that is reflected by the 2Nth optical reflection device through the device focus to the end reflection optics, and the light scattering signal is reflected through the device focus. 2N oblique reflecting optics. The terminal reflective optics can be an optical component or a combination of multiple optical components. The excitation source and the light scattering signal may pass through the terminal reflection optics one or more times.
源端反射光学器件,指对激发光源和光散射信号起到下述作用的光学器件,即将由第1个光学反射器件反射经过设备焦点到达源端反射光学器件的激发光源、光散射信号反射经过设备焦点到达第1个斜反射光学器件。The source reflection optics refers to an optical device that acts on the excitation light source and the light scattering signal, that is, the excitation light source that reflects the first optical reflection device through the device focus to the source reflection optics, and the light scattering signal reflects through the device. The focus reaches the first oblique reflecting optics.
设备焦点指各个光学反射器件焦点附近的较小范围,其发射向终端反射光学器件和源端反射光学器件的光散射信号被终端反射光学器件和源端反射光学器件反射回焦点,发射向第2M个斜反射光学器件的光散射信号被第2M个斜反射光学器件反射向第2M-1个斜反射光学器件,然后由第2M-1个斜反射光学器件反射回焦点,发射向第2M-1个斜反射光学器件的光散射信号被第2M-1个斜反射光学器件反射向第2M个斜 反射光学器件,然后由第2M个斜反射光学器件反射回焦点。其中M为大于等于1小于等于N的自然数。The device focus refers to a small range near the focus of each optical reflection device, and the light scattering signal emitted to the terminal reflection optics and the source reflection optics is reflected back to the focus by the terminal reflection optics and the source reflection optics, and is transmitted to the 2M. The light scattering signal of the oblique reflecting optics is reflected by the 2M oblique reflecting optics to the 2M-1 oblique reflecting optics, and then reflected back to the focus by the 2M-1 oblique reflecting optics, and transmitted to the 2M-1 The light scattering signals of the oblique reflecting optics are reflected by the 2M-1 oblique reflecting optics to the 2M oblique reflecting optics, and then reflected back to the focus by the 2M oblique reflecting optics. Where M is a natural number greater than or equal to 1 and less than or equal to N.
在将本发明的收集系统应用于拉曼等设备时,激发光源的发射装置发射的激发光源经过设备焦点后激发位于设备焦点的样品的光散射信号由斜反射光学器件,终端反射光学器件,源端反射光学器件收集,传输给分析装置和转换装置,并由数据处理设备处理和记录。When the collecting system of the present invention is applied to a device such as Raman, the excitation light source emitted from the emitting device of the excitation light source excites the light scattering signal of the sample located at the focus of the device after passing through the focus of the device by the oblique reflecting optical device, the terminal reflecting optical device, and the source The end reflection optics are collected, transmitted to the analysis device and the conversion device, and processed and recorded by the data processing device.
分析装置包括但不限于单色仪,光谱仪,干涉仪等装置,及以上装置的组合。Analytical devices include, but are not limited to, monochromators, spectrometers, interferometers, and the like, and combinations of the above.
转换装置指可以对光散射信号进行记录,或者将光转换成电、磁、声、力、热等信号进行记录的包括但不限光电耦合器,光电倍增管,示波器,热敏电偶等装置,及以上装置的组合。The conversion device refers to a device that can record a light scattering signal or convert the light into electric, magnetic, acoustic, force, heat, etc., including but not limited to a photocoupler, a photomultiplier tube, an oscilloscope, a thermocouple, and the like. , and a combination of the above devices.
数据处理设备包括但不限于电脑,打印机,示波器,手机等数据处理设备,及以上设备的组合。Data processing equipment includes, but is not limited to, data processing equipment such as computers, printers, oscilloscopes, mobile phones, and the like.
需要说明的是,本发明中所提到的“来自设备焦点的发散光”指的是以设备焦点为发射中心发射的,或者汇聚至所述设备焦点后并透过所述设备焦点的光,即,该发散光包含各种可以视同为从设备焦点发出的光或激光。It should be noted that “divergence light from the focus of the device” mentioned in the present invention refers to the light emitted by the device focus as the emission center or concentrated to the focus of the device and transmitted through the focus of the device. That is, the divergent light includes a variety of light or laser light that can be considered to be emitted from the focus of the device.
本发明中所提到的“光学反射器件”不仅限于独立构成的光学器件,还可以指有多个部件组成的光学器件。The "optical reflection device" mentioned in the present invention is not limited to an optical device which is independently constructed, and may also mean an optical device composed of a plurality of components.
有益效果:本发明的光散射共焦激发收集系统,当利用激发光源激发透明样品的散射信号时,可以高效的利用激发光源的能量,光散射信号也会被2N个光学反射器件收集,发射到特定的方向。增加终端反射光学器件和源端反射光学器件后,激发光源的利用效率进一步提高甚至在光散射共焦激发收集系统形成振荡从而成倍增加激发光源的使用效率。Advantageous Effects: The light-scattering confocal excitation collecting system of the present invention can efficiently utilize the energy of the excitation light source when the scattering signal of the transparent sample is excited by the excitation light source, and the light scattering signal is also collected by 2N optical reflection devices and transmitted to Specific direction. After the addition of the terminal reflection optics and the source reflection optics, the utilization efficiency of the excitation source is further improved even when the light scattering confocal excitation collection system forms an oscillation to multiply the use efficiency of the excitation source.
该光散射共焦激发收集系统能够将激发光源经若干个光学器件多次重复聚焦于设备焦点,充分利用激发光源的能量,激发位于设备焦点的样品的光散射信号的功能,同时能够对位于设备焦点的样品散射向立体空间的光散射信号进行高效收集。The light scattering confocal excitation collection system is capable of repeatedly focusing the excitation light source on the device focus through a plurality of optical devices, fully utilizing the energy of the excitation light source, exciting the light scattering signal of the sample located at the focus of the device, and being able to locate the device at the same time. Focused sample scattering efficiently collects light scattering signals into the stereo space.
附图说明DRAWINGS
下面结合附图和实施例对本发明专利进一步说明。The invention will be further described below in conjunction with the accompanying drawings and embodiments.
图1是本发明一个实施例的共焦激发收集系统的平面结构原理图;1 is a schematic plan view showing the planar structure of a confocal excitation collecting system according to an embodiment of the present invention;
图2是本发明另一个实施例的立体结构原理图。图1和1-2中,1.1-1.(2N)表示斜反射光学器件,2表示设备焦点,3表示终端反射光学器件,4表示源反射光学器件。2 is a schematic diagram of a three-dimensional structure of another embodiment of the present invention. In Figures 1 and 1-2, 1.1-1. (2N) represents oblique reflecting optics, 2 represents device focus, 3 represents terminal reflective optics, and 4 represents source reflective optics.
图3为本发明实施例中的共焦激发收集系统中入射光的光路示意图;3 is a schematic diagram of an optical path of incident light in a confocal excitation collection system according to an embodiment of the present invention;
图4为本发明实施例中的共焦激发收集系统中散射光的光路示意图;4 is a schematic diagram of an optical path of scattered light in a confocal excitation collection system according to an embodiment of the present invention;
图5本发明实施例中的共焦激发收集系统中出射光的光路示意图;5 is a schematic diagram of an optical path of light emitted from a confocal excitation collection system in an embodiment of the present invention;
图6示出了转向光学反射器件1.(2M-1)和汇聚光学反射器件1.(2M)采用同一种光学器件的示例。Fig. 6 shows an example in which the steering optical reflection device 1. (2M-1) and the converging optical reflection device 1. (2M) employ the same optical device.
图7示出了转向光学反射器件1.(2M-1)和汇聚光学反射器件1.(2M)采用不同的光学器件的示例。Fig. 7 shows an example in which different optical devices are employed for the steering optical reflecting device 1. (2M-1) and the converging optical reflecting device 1. (2M).
图8示出了采用凹面反射镜和平面反射镜的组合作为转向光学反射器件的示例。Fig. 8 shows an example in which a combination of a concave mirror and a plane mirror is employed as a steering optical reflection device.
图9示出了采用凸透镜镜和平面反射镜的组合来分别作为转向光学反射器件和汇聚光学器件的示例。Fig. 9 shows an example in which a combination of a convex lens mirror and a plane mirror is used as a steering optical reflecting device and a collecting optical device, respectively.
图10、11、12、13、14分别为具有1组、2组、3组、4组、5组转向光学反射器件和汇聚光学反射器件组合的光散射共焦激发收集系统。10, 11, 12, 13, and 14 are light scattering confocal excitation collection systems having a combination of one, two, three, four, and five sets of turning optical reflecting devices and converging optical reflecting devices, respectively.
图15示出了本发明的共焦激发收集系统的一种应用实例。Figure 15 shows an application example of the confocal excitation collection system of the present invention.
图16中示出了采用凹面反射镜作为终端反射器件或者源反射器件的示例。An example using a concave mirror as a terminal reflection device or a source reflection device is shown in FIG.
图17中示出了采用透镜和反射镜的组合作为终端反射器件或者源反射器件的示例。An example in which a combination of a lens and a mirror is employed as a terminal reflection device or a source reflection device is shown in FIG.
图18中示出了采用凹面反射镜和反射镜的组合作为终端反射器件或者源反射器件的示例。A combination of a concave mirror and a mirror is shown in Fig. 18 as an example of a terminal reflection device or a source reflection device.
图19中示出了采用透镜和直角反射镜的组合作为终端反射元件模块或者源反射元件模块的示例。An example in which a combination of a lens and a right angle mirror is employed as the terminal reflective element module or the source reflective element module is shown in FIG.
图20中示出了采用透镜和直角反射镜的组合作为终端反射元件模块以及源反射元件模块的完整光路示意图。A complete optical path diagram using a combination of a lens and a right angle mirror as a terminal reflective element module and a source reflective element module is shown in FIG.
具体实施方式Detailed ways
图1是本发明的一个实施例的光散射共焦激发收集系统的平面结构示意图。如图1中所示,1.1至1.(2N)表示用于进行往返反射的光学反射器件,本实施例中采用斜 反射光学器件。2表示设备焦点,3表示终端反射光学器件,4表示源端反射光学器件。该光散射共焦激发收集系统包括2N个光学反射器件1,其中N为大于等于1的自然数,2N个光学反射器件1具有同一个焦点2,这里称为设备焦点,来自设备焦点2的发散光在被第一个光学反射器件反射后,能够依次被其余光学反射器件反射,并至少再一次通过所述设备焦点2。1 is a schematic plan view showing the structure of a light scattering confocal excitation collection system according to an embodiment of the present invention. As shown in Fig. 1, 1.1 to 1. (2N) denotes an optical reflection device for performing reciprocal reflection, and oblique reflection optics are employed in this embodiment. 2 denotes the device focus, 3 denotes the terminal reflection optics, and 4 denotes the source reflection optics. The light scattering confocal excitation collection system comprises 2N optical reflection devices 1, wherein N is a natural number greater than or equal to 1, 2N optical reflection devices 1 have the same focus 2, referred to herein as device focus, and divergent light from device focus 2 After being reflected by the first optical reflecting device, it can be reflected by the remaining optical reflecting devices in turn and at least once again through the device focus 2.
具体而言,以应用于拉曼光谱仪中为例,源端反射光学器件4的中心设有入射口或入光孔(也可以偏心设置),激光通过入光孔射入光散射共焦激发收集系统内部。入射激光对向设备焦点2入射并照射在设备焦点2处的样品上。激光照射在样品(本发明系统主要是针对透明或半透明样品设计)上之后,部分或全部透射通过位于设备焦点2处的样品,进而进一步入射在第一个斜反射光学器件1.1上,该斜反射光学器件1.1为转向光学反射器件1.1。若入射在转向光学反射器件1.1的激光为平行光,则转向光学反射器件1.1采用平面镜,其将入射在其上的激光直接反射至汇聚光学反射器件1.2。若入射在转向光学反射器件1.1的激光为发散光,则转向光学反射器件1.1采用抛物面镜,其将发散光转换成平行光反射至汇聚光学反射器件1.2。Specifically, in the Raman spectrometer as an example, the center of the source-side reflection optics 4 is provided with an entrance port or an entrance aperture (which may also be eccentrically disposed), and the laser is incident on the light-scattering confocal excitation through the entrance aperture. Inside the system. The incident laser is incident on the device focus 2 and illuminates the sample at the device focus 2. After the laser is irradiated onto the sample (the system of the invention is primarily directed to a transparent or translucent sample design), some or all of the sample is transmitted through the sample at the focus 2 of the device and further incident on the first oblique reflecting optic 1.1, the oblique The reflective optics 1.1 is a steering optical reflector 1.1. If the laser light incident on the steering optical reflecting device 1.1 is parallel light, the steering optical reflecting device 1.1 employs a plane mirror that directly reflects the laser light incident thereon to the collecting optical reflecting device 1.2. If the laser light incident on the steering optical reflecting device 1.1 is divergent light, the steering optical reflecting device 1.1 employs a parabolic mirror that converts the divergent light into parallel light to be reflected to the converging optical reflecting device 1.2.
优选地,激光入射时,聚焦在设备焦点2位置处入射,这样从设备焦点2透射的激光为发散光,转向光学反射器件1.1采用焦点位于设备焦点2处的抛物面镜,发散的激光达到转向光学反射器件1.1之后,转换成平行光,入射至汇聚光学反射器件1.2,汇聚光学反射器件1.2接收平行入射的激光并将该激光重新汇聚至设备焦点2,从设备焦点2处出射的发散激光则继续射向下一个转向光学反射器件,以此类推,一直到激光入射在终端反射光学器件3上,终端反射光学器件3安装在第偶数个斜反射光学器件的下游,也即汇聚光学反射器件的光路下游。例如,假设终端反射光学器件3安装在第6个斜反射光学器件,即第3个汇聚光学反射器件的光路下游,其与第3个汇聚光学反射器件相对于设备焦点2关于焦点彼此相对设置,终端反射光学器件3用于将从设备焦点2发出或等同于从设备焦点2发出的光反射并重新汇聚在设备焦点2。比如,终端反射光学器件3可以为焦点位于设备焦点2的球面镜。Preferably, when the laser is incident, the focus is incident at the position of the device focus 2, so that the laser light transmitted from the device focus 2 is divergent light, and the steering optical reflecting device 1.1 adopts a parabolic mirror whose focus is at the focus 2 of the device, and the divergent laser reaches the steering optics. After the reflective device 1.1 is converted into parallel light, incident on the converging optical reflecting device 1.2, the converging optical reflecting device 1.2 receives the parallel incident laser light and re-converges the laser light to the device focus 2, and the diverging laser light exiting from the device focus 2 continues Shooting to the next turning optical reflecting device, and so on, until the laser is incident on the terminal reflecting optics 3, and the terminal reflecting optics 3 is mounted downstream of the even number of oblique reflecting optics, that is, the optical path of the collecting optical reflecting device Downstream. For example, it is assumed that the terminal reflection optics 3 are mounted downstream of the optical path of the sixth oblique reflection optics, ie, the third converging optical reflection device, which is disposed opposite to the focus of the third convergent optical reflection device with respect to the device focus 2, The terminal reflection optics 3 are used to reflect and re-converge light emitted from the device focus 2 or equivalent from the device focus 2 at the device focus 2. For example, the terminal reflective optics 3 can be a spherical mirror with a focus at the device focus 2.
当激光照射在样品上时,由于样品与激光的相互作用会发生拉曼散射、瑞利散射等现象,进而由位于设备焦点2处的样品会发出散射光。对于激发产生的散射光而言,其会由设备焦点2向收集系统内的各个方向发出。假设一束散射光由设备焦点2处的 样品发出,并照射在转向光学反射镜1.1上,发散的信号光达到转向光学反射器件1.1之后,转换成平行光,入射至汇聚光学反射器件1.2,汇聚光学反射器件1.2接收平行入射的信号光并将该信号光重新汇聚至设备焦点2,从设备焦点2处出射的信号光则继续射向下一个转向光学反射器件,以此类推,一直到信号光入射在端面反射光学器件3上,端面反射光学器件3将信号光反射并重新汇聚在设备焦点2,即沿原路返回,最后从源端反射光学器件4处出射。When the laser is irradiated on the sample, Raman scattering, Rayleigh scattering, etc. occur due to the interaction of the sample with the laser, and the scattered light is emitted by the sample located at the focus 2 of the device. For the scattered light generated by the excitation, it is emitted by the device focus 2 in various directions within the collection system. Suppose a beam of scattered light is emitted by the sample at the focus 2 of the device and is irradiated on the steering optical mirror 1.1. After the divergent signal light reaches the steering optical reflecting device 1.1, it is converted into parallel light, incident on the converging optical reflecting device 1.2, and concentrated. The optical reflective device 1.2 receives the parallel incident signal light and reconverges the signal light to the device focus 2, the signal light emerging from the device focus 2 continues to be directed to the next steering optical reflective device, and so on, up to the signal light Incident on the end face reflecting optics 3, the end face reflecting optics 3 reflects and reconverges the signal light at the device focus 2, i.e., returns along the original path, and finally exits from the source end reflecting optics 4.
图2是本发明另一个实施例的立体结构原理图。本实施例中,更清晰的示出了共焦激发收集系统的立体结构。图中为了更清楚表示各个器件,仅画出了两组转向反射光学器件1.1、1.3和汇聚反射光学器件1.2、1.4。2 is a schematic diagram of a three-dimensional structure of another embodiment of the present invention. In the present embodiment, the three-dimensional structure of the confocal excitation collection system is more clearly shown. In the figure, in order to more clearly represent the individual devices, only two sets of steering reflective optics 1.1, 1.3 and converging reflective optics 1.2, 1.4 are shown.
需要说明的是,上述实施例中,光散射共焦激发收集系统添加了终端反射器件,该终端反射器件接收最后一个汇聚光学反射器件穿过设备焦点2的激光或者来自设备焦点2的信号光,并将所接收到的光原路反射回。但是,本领域技术人员应该理解,对于部分应用场景,可以省略终端反射器件,即不设置将激光和信号光通过终端反射器件原路反射回的器件。It should be noted that, in the above embodiment, the light scattering confocal excitation collection system adds a terminal reflection device, and the terminal reflection device receives the laser light from the device focus 2 or the signal light from the device focus 2 of the last convergence optical reflection device. And reflect the received optical path back. However, those skilled in the art should understand that for some application scenarios, the terminal reflective device may be omitted, that is, the device that reflects the laser and signal light back through the terminal reflective device is not provided.
终端反射光学器件使得由第2N个斜反射光学器件反射的激发光聚焦到焦点到达源端反射光学器件之后,再由终端反射光学器件反射聚焦到焦点后射向第2N个斜反射光学器件,由第2N个斜反射光学器件反射到第2N-1个斜反射光学器件,以此类推,直到激发光由第1个斜反射光学器件反射聚焦到焦点后,出射出光散射共焦激发收集系统。激发光从进入光散射共焦激发收集系统到从光散射共焦激发收集系统出射,共2N+1次聚焦到焦点。The terminal reflection optics causes the excitation light reflected by the 2Nth oblique reflection optics to be focused to the focus to reach the source reflection optics, and then reflected by the terminal reflection optics to focus and then to the 2N oblique reflection optics, The 2N oblique reflecting optics are reflected to the 2N-1 oblique reflecting optics, and so on, until the excitation light is reflected by the first oblique reflecting optics to focus, and then exits the light scattering confocal excitation collecting system. The excitation light exits from the light-scattering confocal excitation collection system to the light-scattering confocal excitation collection system, focusing to focus at 2N+1 times.
终端反射光学器件还使得由第2N个斜反射光学器件反射的光散射信号经过焦点到达终端反射光学器件之后,与焦点散射向端反射光学器件的光散射信号一起由终端反射光学器件反射经过焦点后射向第2N个斜反射光学器件,由第2N个斜反射光学器件反射到第2N-1个斜反射光学器件,以此类推,直到光散射信号由第1个斜反射光学器件反射经过焦点后出射出光散射共焦激发收集系统。发射向2N个斜反射光学器件(乃至发射向第偶数个斜反射镜的)和终端反射光学器件的光散射信号,在增加端反射光学器件之后均由第1个斜反射光学器件反射经过焦点后出射出光散射共焦激发收集系统。The terminal reflective optics further causes the light scattering signal reflected by the 2Nth oblique reflective optic to pass through the focus to the terminal reflective optic, and after being reflected by the terminal reflective optics along the light scattering signal of the focus scattering toward the end reflecting optic Aiming at the 2N oblique reflecting optics, reflected by the 2N oblique reflecting optics to the 2N-1 oblique reflecting optics, and so on, until the light scattering signal is reflected by the first oblique reflecting optics through the focus An out-of-light scattering confocal excitation collection system is emitted. Light scattering signals emitted to 2N oblique reflecting optics (or even to an even number of oblique mirrors) and terminal reflective optics are reflected by the first oblique reflecting optic after passing through the focus after adding the end reflecting optics An out-of-light scattering confocal excitation collection system is emitted.
源端反射光学器件4使得由第1个斜反射光学器件反射的光散射信号经过焦点到达源端反射光学器件之后,由源端反射光学器件反射经过焦点后射向第1个斜反射光学器件,由第1个斜反射光学器件反射到第2个斜反射光学器件,由第2个斜反射光学器件反射经过焦点后射向第3个斜反射光学器件,直到光散射信号由第2N个斜反射光学器件反射聚焦到焦点后出射出光散射共焦激发收集系统。发射向2N个斜反射光学器件的光散射信号,在增加源端反射光学器件之后均由第2N个斜反射光学器件反射经过焦点后出射出光散射共焦激发收集系统。The source-reflecting optical device 4 causes the light-scattering signal reflected by the first oblique-reflecting optical device to pass through the focus to the source-side reflecting optical device, and then reflected by the source-reflecting optical device through the focus and then directed to the first oblique reflecting optical device. Reflected by the first oblique reflecting optics to the second oblique reflecting optics, reflected by the second oblique reflecting optics through the focus and then directed to the third oblique reflecting optics until the light scattering signal is reflected by the 2Nth oblique The optical device reflects the focus to the focus and exits the light scattering confocal excitation collection system. The light-scattering signal emitted to the 2N oblique reflecting optics is reflected by the 2N oblique reflecting optics after passing through the focus after the source-side reflecting optics is added, and then exits the light-scattering confocal excitation collecting system.
同时,终端反射光学器件和源端反射光学器件的共同作用,使得由第2N个斜反射光学器件反射的激发光源聚焦到焦点到达终端反射光学器件之后,由端反射光学器件反射聚焦到焦点后射向第2N个斜反射光学器件,直到激发光源由第1个斜反射光学器件反射聚焦到焦点后到达源端反射光学器件,再由源端反射光学器件反射聚焦到焦点后射向第1个斜反射光学器件,直到激发光源由第2N个斜反射光学器件反射聚焦到焦点之后到达端反射光学器件,使激发光源在光散射共焦激发收集系统中形成振荡。如果2N个斜反射光学器件,端反射光学器件,源端反射光学器件其中有1个或者数个光学器件可以反射激发光源,透射光散射信号,则激发光源在光散射共焦激发收集系统中振荡,位于焦点的样品被激发出的光散射信号由透射散射信号的1个或者数个元件模块出射出光散射共焦激发收集系统。At the same time, the terminal reflection optics and the source reflection optics cooperate to cause the excitation light source reflected by the 2Nth oblique reflection optics to focus on the focus to reach the terminal reflection optics, and the end reflection optics reflect the focus to the focus and then shoot. To the 2N oblique reflection optics until the excitation light source is reflected by the first oblique reflection optics to focus, and then reaches the source reflection optics, and then reflected by the source reflection optics to focus to the first oblique The optics are reflected until the excitation source is reflected by the 2N oblique reflective optics to focus and then reaches the end reflecting optics, causing the excitation source to oscillate in the light scattering confocal excitation collection system. If 2N oblique reflecting optics, end reflecting optics, and source reflecting optics have one or more optics that can reflect the excitation source, transmitting the light scattering signal, the excitation source oscillates in the light scattering confocal excitation collection system The light scattering signal excited by the sample at the focus is emitted by the light scattering confocal excitation collection system by one or several component modules of the transmission and scattering signal.
虽然上述实施例中仅以数个转向光学反射器件以及汇聚光学反射器件的方式进行的描述,但是本领域技术人员可以理解,斜反射光学器件可以采用更多的转向光学反射器件以及汇聚光学反射器件,只要保证每个转向光学反射器件能够将来自设备焦点2的光反射向多个汇聚光学反射器件中的一个即可,每个汇聚光学反射器件只要能够将来自上一个转向光学反射器件的光反射向(优选汇聚至)设备焦点2,并入射至下一个转向光学反射器件即可。Although the above embodiment has been described in terms of only a plurality of turning optical reflecting devices and collecting optical reflecting devices, those skilled in the art will appreciate that oblique reflecting optical devices can employ more steering optical reflecting devices and concentrating optical reflecting devices. As long as each steering optical reflecting device is capable of reflecting light from the device focus 2 toward one of the plurality of converging optical reflecting devices, each converging optical reflecting device is capable of reflecting light from the last turning optical reflecting device. It is (preferably concentrated) to the device focus 2 and incident on the next steering optical reflecting device.
图3中示出了另一个实施例中射入光散射共焦激发收集系统的激发光的光路示意图。An optical path diagram of the excitation light incident into the light scattering confocal excitation collection system in another embodiment is shown in FIG.
如图3所示,射入光散射共焦激发收集系统的激发光经过聚焦在设备焦点2后照射到第1个斜反射光学器件1.1(用作转向光学反射器件),由第1个斜反射光学器件1.1反射到第2个斜反射光学器件1.2(用作汇聚光学反射器件),由第2个斜反射 光学器件1.2聚焦到焦点2,然后到达第3个斜反射光学器件1.3,直到第2N个斜反射光学器件1.(2N)将激发光源聚焦到焦点后出射出光散射共焦激发收集系统。本实施例中,未采用终端反射器件。As shown in FIG. 3, the excitation light incident on the light-scattering confocal excitation collection system is irradiated to the first oblique reflection optics 1.1 (used as a steering optical reflection device) after being focused on the device focus 2, and is deflected by the first The optical device 1.1 is reflected to the second oblique reflecting optics 1.2 (used as a converging optical reflecting device), is focused by the second oblique reflecting optics 1.2 to the focus 2, and then reaches the third oblique reflecting optics 1.3 until the 2N An oblique reflective optic 1. (2N) emits a light-scattering confocal excitation collection system after focusing the excitation source to focus. In this embodiment, the terminal reflection device is not employed.
图4示出了图3所示实施例的收集系统中,样品发出的散射光的一种光路示意图。如图4所示,由位于焦点2的样品发出的散射向立体空间的光散射信号,散射向第1,3,5….等统称第2M-1个斜反射光学器件1.(2M-1),M为1与N之间的自然数。由第2M-1个斜反射光学器件1.(2M-1)反射到第2M个斜反射光学器件1.(2M),由第2M个斜反射光学器件1.(2M)反射,经过设备焦点2后到达第2M+1个斜反射光学器件1.(2M+1),直到光散射信号由第2N个斜反射光学器件1.(2N)反射后,经过焦点2出射出光散射共焦激发收集系统。Figure 4 is a schematic illustration of an optical path of scattered light emitted by a sample in the collection system of the embodiment of Figure 3. As shown in FIG. 4, the light scattering signal emitted by the sample located at the focus 2 to the stereoscopic space is scattered to the first, third, fifth, etc. collectively referred to as the 2M-1 oblique reflecting optical device 1. (2M-1 ), M is a natural number between 1 and N. Reflected by the 2M-1 oblique reflecting optics 1. (2M-1) to the 2M oblique reflecting optics 1. (2M), reflected by the 2M oblique reflecting optics 1. (2M), through the device focus 2, then reach the 2M+1 oblique reflection optics 1. (2M + 1), until the light scattering signal is reflected by the 2N oblique reflection optics 1. (2N), after the focus 2 out of the light scattering confocal excitation Collection system.
图5示出了图3所示实施例的收集系统中,样品发出的散射光的另一种光路示意图,由位于焦点2的样品发出的散射向立体空间的光散射信号,照射到第2,4,6….等统称第2M个斜反射光学器件1.(2M),由第2M个斜反射光学器件1.(2M)反射到第2M-1个斜反射光学器件1.(2M-1),由第2M-1个斜反射光学器件1.(2M-1)反射,经过焦点后到达第2M-2个斜反射光学器件1.(2M-2),直到光散射信号由第1个斜反射光学器件1.1反射后,经过焦点2出射出光散射共焦激发收集系统。FIG. 5 is a view showing another optical path of the scattered light emitted from the sample in the collecting system of the embodiment shown in FIG. 3, the light scattering signal emitted from the sample located in the focus 2 to the stereoscopic space is irradiated to the second, 4,6.... etc. collectively referred to as the 2M oblique reflecting optics 1. (2M), reflected by the 2M oblique reflecting optics 1. (2M) to the 2M-1 oblique reflecting optics 1. (2M-1 ), reflected by the 2M-1 oblique reflection optics 1. (2M-1), after the focus reaches the 2M-2 oblique reflection optics 1. (2M-2) until the light scattering signal is from the first After the oblique reflecting optics 1.1 is reflected, a light scattering confocal excitation collecting system is emitted through the focus 2.
图6示出了转向反射光学器件和汇聚反射光学器件配合使用的情况。上述实施例中的转向反射光学器件和汇聚反射光学器件均采用的该结构,即,倾斜放置的抛物面反射镜。Figure 6 shows the use of a combination of a steering reflective optic and a converging reflective optic. The structure adopted by both the steering reflection optics and the converging reflection optics in the above embodiment, that is, the obliquely placed parabolic mirror.
在另一个实施例中,如图7中所示,采用凸透镜和平面反射镜的组合来替代抛物面反射镜,实现转向反射光学器件的作用。如图9中所示,类似的,采用凸透镜和平面反射镜的组合来替代抛物面反射镜,实现转向以及汇聚反射光学器件的作用。凸透镜用于将来自焦点的发散光转化为平行光,而平面反射镜用于进行转向。图8则示出了当转向以及汇聚反射光学器件之间不适合直接进行光路连通时,添加了用于中转的平面反射镜的情形。In another embodiment, as shown in Figure 7, the combination of a convex lens and a planar mirror is used in place of a parabolic mirror to effect the function of the steering reflective optics. As shown in Figure 9, similarly, a combination of a convex lens and a planar mirror is used in place of the parabolic mirror to effect steering and converging reflective optics. Convex lenses are used to convert divergent light from the focus into parallel light, while planar mirrors are used for steering. Fig. 8 shows the case where a plane mirror for relaying is added when the steering and the concentrated reflecting optics are not suitable for direct optical path communication.
图10,11,12,13,14分别为具有1组、2组、3组、4组、5组转向光学反射器件和汇聚光学反射器件组合的光散射共焦激发收集系统。这些光散射共焦激发收集系统的工作过程与图1和图3中的实施例类似,均是采用奇数编号的斜光学反射镜作为转 向光学器件,采用编号为偶数的斜反射光学器件作为汇聚光学器件。因此,这里不再详细描述。10, 11, 12, 13, and 14 are light scattering confocal excitation collection systems having a combination of 1 set, 2 sets, 3 sets, 4 sets, 5 sets of turning optical reflecting devices and converging optical reflecting devices, respectively. The operation of these light-scattering confocal excitation collection systems is similar to the embodiment of Figures 1 and 3, using odd-numbered oblique optical mirrors as steering optics, with even-numbered oblique-reflecting optics as converging optics. Device. Therefore, it will not be described in detail here.
图15示出了本发明的共焦激发收集系统应用在拉曼光谱仪中的示例。如图15所示,其包括激发光源5、分析装置6、转换装置7以及数据处理设8。激发光源5发射的激发光经过设备焦点2后激发位于设备焦点2的样品的光散射信号,光散射信号由上述实施例中的共焦激发收集系统收集后,由源端反射光学器件4收集(比如,通过源端反射器件上的激光入射孔原路返回并经过分光),传输给分析装置6和转换装置7,并由数据处理设8备处理和记录。Figure 15 shows an example of the application of the confocal excitation collection system of the present invention in a Raman spectrometer. As shown in FIG. 15, it includes an excitation light source 5, an analysis device 6, a conversion device 7, and a data processing device 8. The excitation light emitted by the excitation light source 5 passes through the device focus 2 to excite the light scattering signal of the sample located at the device focus 2, and the light scattering signal is collected by the confocal excitation collection system in the above embodiment, and then collected by the source reflection optics 4 ( For example, it is returned to the analysis device 6 and the conversion device 7 through the laser entrance hole on the source reflection device, and is transferred to the analysis device 6 and the conversion device 7, and processed and recorded by the data processing device.
图16、图17以及图18中分别示出了三种不同的终端反射器件或者源端反射器件的结构。这些结构本领域技术人员基于附图即可了解,这里不再详细描述。The structure of three different terminal reflective devices or source-side reflective devices is shown in Figures 16, 17, and 18, respectively. These structures will be understood by those skilled in the art based on the drawings and will not be described in detail herein.
图19中示出了采用透镜和直角反射镜的组合作为终端反射器件以及源端反射器件的示例。在本实施例中,终端反射器件以及源端反射器件都采用偏移式构造。A combination of a lens and a right angle mirror as an example of a terminal reflection device and a source reflection device is shown in FIG. In this embodiment, both the terminal reflective device and the source reflective device are of an offset configuration.
具体而言,如图30中所示,源端反射器件采用源端偏移反射镜,源端偏移反射镜上具有激光入射口,激发光通过入射口进入收集系统照射到设备焦点处。偏移式反射镜的特点是,能够将由第一位置入射至偏移式反射镜的光,从偏移式反射镜的第二位置处反射出去,出射方向与入射方向相反、出射光与入射光彼此平行只是二者具有水平位移。本实施例中,偏移式反射镜采用直角反射镜,直角反射镜的两个内侧边为两个反射镜,入射在直角反射镜第一边的入射光经第一边反射后,从直角反射镜的第二边出射。用于激发光的入光孔设置在直角反射镜的两边之间。Specifically, as shown in FIG. 30, the source-side reflection device employs a source-end deflection mirror having a laser entrance port on the source-side deflection mirror, and the excitation light enters the collection system through the entrance port to illuminate the focus of the device. The offset mirror is characterized in that light incident from the first position to the offset mirror can be reflected from the second position of the offset mirror, and the outgoing direction is opposite to the incident direction, and the outgoing light and the incident light are emitted. Parallel to each other only the two have horizontal displacement. In this embodiment, the offset mirror adopts a right angle mirror, and the two inner sides of the right angle mirror are two mirrors, and the incident light incident on the first side of the right angle mirror is reflected by the first side, and is from a right angle. The second side of the mirror exits. A light entrance hole for exciting light is disposed between both sides of the right angle mirror.
图20中将偏移式反射与本发明的收集系统组合使用,实现更多次的聚焦和信号增强。The offset reflection is used in combination with the collection system of the present invention in Figure 20 to achieve more focus and signal enhancement.
优选地,源端反射器件还包括焦点位于设备焦点2的聚焦透镜,用于对入射的激发光进行聚焦。Preferably, the source-side reflective device further includes a focusing lens having a focus at the focus 2 of the device for focusing the incident excitation light.
类似地,终端反射器件包括焦点位于设备焦点2的光学转换器件(比如凸透镜)以及终端偏移反射镜,光学转换器件通过透射或反射方式将来自最后一个汇聚光学反射器件的入射激光转换成平行光入射至终端偏移反射镜,终端偏移反射镜相对于光学转换器件具有水平偏移(即终端偏移反射镜的中心不与图中凸透镜的光轴正对),以使得入射在终端偏移反射镜第一位置的激光从终端偏移反射镜的第二位置出射。Similarly, the terminal reflective device includes an optical conversion device (such as a convex lens) having a focus at the device focus 2 and a terminal offset mirror that converts incident laser light from the last concentrated optical reflective device into parallel light by transmission or reflection. Incident to the terminal offset mirror, the terminal offset mirror having a horizontal offset with respect to the optical conversion device (ie, the center of the terminal offset mirror is not opposite the optical axis of the convex lens in the figure) to cause the incident to be offset at the terminal The laser at the first position of the mirror exits from the second position of the terminal offset mirror.
采用这种偏移式构造可以成倍增加信号强度。With this offset configuration, the signal strength can be multiplied.
虽然上面结合本发明的优选实施例对本发明的原理进行了详细的描述,本领域技术人员应该理解,上述实施例仅仅是对本发明的示意性实现方式的解释,并非对本发明包含范围的限定。实施例中的细节并不构成对本发明范围的限制,在不背离本发明的精神和范围的情况下,任何基于本发明技术方案的等效变换、简单替换等显而易见的改变,均落在本发明保护范围之内。While the principles of the present invention have been described in detail, the preferred embodiments of the present invention The details of the embodiments are not intended to limit the scope of the invention, and any obvious changes, such as equivalent transformations, simple substitutions, etc., based on the technical solutions of the present invention, fall within the scope of the present invention. Within the scope of protection.
虽然上面结合本发明的优选实施例对本发明的原理进行了详细的描述,本领域技术人员应该理解,上述实施例仅仅是对本发明的示意性实现方式的解释,并非对本发明包含范围的限定。实施例中的细节并不构成对本发明范围的限制,在不背离本发明的精神和范围的情况下,任何基于本发明技术方案的等效变换、简单替换等显而易见的改变,均落在本发明保护范围之内。While the principles of the present invention have been described in detail, the preferred embodiments of the present invention The details of the embodiments are not intended to limit the scope of the invention, and any obvious changes, such as equivalent transformations, simple substitutions, etc., based on the technical solutions of the present invention, fall within the scope of the present invention. Within the scope of protection.

Claims (8)

  1. 一种光散射共焦激发收集系统,其特征在于,包括:2N个光学反射器件,其中N为大于等于1的自然数,2N个光学反射器件具有同一个设备焦点,来自光散射共焦激发收集系统内一特定点的发散光在被第一个光学反射器件反射后,能够依次被其余光学反射器件中的至少部分反射,并至少再一次通过所述特定点,所述特定点为所述设备焦点,2N个光学反射器件包括N个转向光学反射器件以及N个汇聚光学反射器件,每个所述转向光学反射器件用于将来自所述设备焦点(2)的光反射向N个汇聚光学反射器件中的一个,每个汇聚光学反射器件用于将来自上一个转向光学反射器件的光反射向所述设备焦点(2)并穿过所述设备焦点(2)入射至下一个转向光学反射器件。A light scattering confocal excitation collection system, comprising: 2N optical reflection devices, wherein N is a natural number greater than or equal to 1, 2N optical reflection devices having the same device focus, from a light scattering confocal excitation collection system The divergent light at a particular point in the interior, after being reflected by the first optically reflective device, can be reflected by at least a portion of the remaining optically reflective devices, and at least once again through the particular point, the particular point being the focus of the device 2N optical reflective devices comprising N steering optical reflective devices and N converging optical reflective devices, each of said steering optical reflective devices for reflecting light from said device focus (2) toward N converging optical reflective devices In one of these, each converging optical reflecting device is used to reflect light from the last turning optical reflecting device toward the device focus (2) and through the device focus (2) to the next turning optical reflecting device.
  2. 根据权利要求1所述的光散射共焦激发收集系统,其特征在于,所述光学反射器件(1)为焦点位于所述设备焦点(2)的斜反射光学反射器件,其中,每个转向光学反射器件将来自设备焦点(2)的发散光反射成平行光入射至N个汇聚光学反射器件中的一个,每个汇聚光学反射器件用于将来自上一个转向光学反射器件的光汇聚至所述设备焦点(2)并穿过所述设备焦点(2)入射至下一个转向光学反射器件。The light-scattering confocal excitation collecting system according to claim 1, wherein said optical reflecting device (1) is a diagonal reflecting optical reflecting device having a focus at said device focus (2), wherein each steering optics The reflective device reflects divergent light from the device focus (2) into parallel light incident on one of the N converging optical reflective devices, each converging optical reflective device for concentrating light from the last steering optical reflective device to the The device focus (2) is incident through the device focus (2) to the next steering optical reflector.
  3. 根据权利要求1所述的光散射共焦激发收集系统,其特征在于,A light scattering confocal excitation collection system according to claim 1 wherein:
    所述光散射共焦激发收集系统还包括终端反射光学器件,所述终端反射光学器件接收最后一个汇聚光学反射器件穿过所述设备焦点(2)的反射光,并将该反射光汇聚至所述设备焦点(2)。The light scattering confocal excitation collection system further includes terminal reflection optics that receive the reflected light of the last converging optical reflection device through the device focus (2) and converge the reflected light to the The device focus (2).
  4. 根据权利要求2所述的光散射共焦激发收集系统,其特征在于,各个所述光学反射器件(1)围绕所述设备焦点(2)布置构成所述光散射共焦激发收集系统,并且预留出激光入射口。The light scattering confocal excitation collection system according to claim 2, wherein each of said optical reflection devices (1) is arranged around said device focus (2) to constitute said light scattering confocal excitation collection system, and Leave the laser entrance.
  5. 根据权利要求4所述的光散射共焦激发收集系统,其特征在于,所述光散射共焦激发收集系统还包括入射光汇聚器件,经激光入射口入射的激光通过所述入射光汇聚器件汇聚至所述设备焦点(2)。The light-scattering confocal excitation collection system according to claim 4, wherein the light-scattering confocal excitation collection system further comprises an incident light concentrating device, and the laser light incident through the laser entrance is concentrated by the incident light concentrating device To the device focus (2).
  6. 根据权利要求3所述的光散射共焦激发收集系统,其特征在于,还包括源端偏移反射镜,所述源端偏移反射镜的上具有激光入射口,所述终端反射光学器件包括焦点位于所述设备焦点(2)的光学转换器件以及终端偏移反射镜,所述光学转换器 件通过透射或反射方式将来自最后一个汇聚光学反射器件的入射激光转换成平行光入射至所述终端偏移反射镜,所述终端偏移反射镜相对于所述光学转换器件具有水平偏移,以使得入射在所述终端偏移反射镜第一位置的激光从所述终端偏移反射镜的第二位置出射。The light scattering confocal excitation collection system of claim 3, further comprising a source offset mirror having a laser entrance on the source offset mirror, the terminal reflective optics comprising An optical conversion device having a focus on the device focus (2) and a terminal offset mirror that converts incident laser light from the last converging optical reflective device into parallel light into the terminal by transmission or reflection An offset mirror having a horizontal offset with respect to the optical conversion device such that laser light incident on the terminal offset mirror first position is offset from the terminal by a mirror The second position is out.
  7. 根据权利要求1所述的光散射共焦激发收集系统,其特征在于,目标样品设置于设备焦点处,激发光以聚焦在设备焦点的方式,正对第一个光学反射器件入射进所述光散射共焦激发收集系统。The light-scattering confocal excitation collection system according to claim 1, wherein the target sample is disposed at a focus of the device, and the excitation light is focused on the focus of the device, and the first optical reflection device is incident on the light. Scattering confocal excitation collection system.
  8. 一种拉曼光谱仪,其特征在于,所述拉曼光谱仪包含权利要求1-7中任意一项所述的光散射共焦激发收集系统。A Raman spectrometer comprising the light scattering confocal excitation collection system of any of claims 1-7.
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