CN114280802A - Single-light-source super-resolution optical storage optical system - Google Patents
Single-light-source super-resolution optical storage optical system Download PDFInfo
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- CN114280802A CN114280802A CN202111681301.1A CN202111681301A CN114280802A CN 114280802 A CN114280802 A CN 114280802A CN 202111681301 A CN202111681301 A CN 202111681301A CN 114280802 A CN114280802 A CN 114280802A
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Abstract
The invention discloses a single-light-source super-resolution optical storage optical system, which comprises a laser light source, a light source module and a light storage module, wherein the laser light source is used for generating laser beams; the first collimation and shaping system is used for collimating the generated laser beam to form a parallel beam; the energy light splitting system is used for splitting incident parallel light beams to form a first parallel light beam and a second parallel light beam; the suppression light spot forming system is used for processing the incident first parallel light beam to form a suppression hollow light spot light beam with a diffraction limit hollow light spot; the excitation light spot forming system is used for carrying out fluorescence excitation and polarization treatment on the incident second parallel light beam to form a circular polarization excitation light spot light beam with the wavelength different from that of the hollow light spot light beam; and the light spot light path adjusting system is used for converging the hollow light spot light beam and the circular polarization excitation light spot light beam onto the information recording material. The invention discloses a single-light-source super-resolution optical storage optical system which has the advantages of simple structure, low system cost, convenience in adjustment and the like.
Description
Technical Field
The invention relates to the technical field of optical storage, in particular to a single-light-source super-resolution optical storage optical system.
Background
In the optical storage field, the density of data to be stored is inversely proportional to the size of a recording spot, and the size of a recording spot is proportional to the size of a focal spot of a writing laser.
The size of an optical imaging light spot is limited by a diffraction limit, the method for reducing the size of the light spot is to reduce the wavelength of light or increase the numerical aperture of an objective lens, the limit is achieved in the two aspects by various methods at the present stage, and in order to break through the diffraction limit, the existing double-beam super-resolution scheme has the following principle: the double-beam super-resolution laser storage technology mainly utilizes the nonlinear action of materials and light, such as stimulated emission radiation, excited intermediate state absorption and other processes, to limit the photoreaction in a region with a tiny center of a light focus to realize the super-diffraction limit, usually a beam of exciting light (inhibiting laser) is needed to initiate the photoreaction, a beam of inhibiting light (inhibiting laser) is needed to stop the photoreaction, and the wavelengths of the two beams of light are different. The suppression light beam is a focus of a light beam and has a hollow shape (a sweet ring shape) (as shown in figure 3), the size of the hollow can be far smaller than the size of a diffraction limit light spot of the focus, the polymerization reaction in the overlapped area of the excitation light beam and the suppression light beam is limited by the suppression light, the polymerization reaction can occur when the hollow part is not limited, the size of the recorded information point is the same as the hollow size of the suppression light spot, and the limit of the diffraction limit is broken through.
The specific scheme is as an example in fig. 2, a laser light source with an unused wavelength, LD _1 and LD _2, wherein the laser LD _1 is a suppression light source, is collimated into a parallel beam with a certain beam width by a collimating and shaping system, is modulated into circularly polarized light by an 1/2 wavelength plate 2 and a 1/4 wavelength plate 40, becomes a hollow beam after passing through a VVP (vortex phase plate 42), and is converged into a hollow diffraction limit spot by an objective lens 62 after being adjusted by an MR mirror 60 (reflecting mirror) and a DM mirror 61 (dichroic mirror) to suppress the beam direction. The laser light source LD _2 is an excitation light source, is also collimated into a parallel light beam with a certain light beam width by the collimation shaping system 2, is modulated into circularly polarized light by the 1/2 wavelength plate 40 and the 1/4 wavelength plate 41, and enters the same objective lens to be converged into a diffraction limit light spot after the beam direction is adjusted by the DM lens. The excitation light spot and the suppression light spot act together on the information recording material, and the material not affected by the suppression light beam reacts with the excitation light beam to form an information recording spot with a super-diffraction limit.
The existing double-beam super-resolution laser storage system has the following defects that two independent laser light sources are needed, the number of the commonly adopted laser light sources is hundreds of thousands of femtosecond lasers, and the number of the commonly adopted laser light sources is millions, so that the cost of the whole system is high, meanwhile, the two paths of lasers have the beam combination problem, namely the beam centers of the two beams of lasers are completely superposed through adjusting a mechanical structure, and the adjustment is difficult.
Disclosure of Invention
The invention provides a single-light-source super-resolution optical storage optical system aiming at the problems.
The technical means adopted by the invention are as follows:
a single light source super-resolution optical storage optical system comprises,
a laser light source for generating a laser beam;
the first collimation and shaping system is used for collimating the generated laser beam to form a parallel beam with a set width;
the energy light splitting system is used for splitting the incident parallel light beams to form a first parallel light beam and a second parallel light beam;
the suppression light spot forming system is used for carrying out polarization and vortex processing on the incident first parallel light beam to form a suppression hollow light spot light beam with a diffraction limit hollow light spot;
the excitation light spot forming system is used for carrying out fluorescence excitation and polarization treatment on the incident second parallel light beam to form a circular polarization excitation light spot light beam with the wavelength different from that of the hollow light spot light beam;
and the light spot light path adjusting system is used for converging the hollow light spot restraining beam and the circular polarization excitation light spot beam on an information recording material.
Further, the excitation light spot forming system comprises a first reflector, a first converging lens, a fluorescent plate, a diaphragm, a second collimation and shaping system, a band-pass filtering system, a polarizer and a first 1/4 wavelength plate;
the first reflector is used for enabling the incident second parallel light beams to be incident to the first converging lens;
the first converging lens is used for converging the incident second parallel light beams to form converging light beams and enabling the converging light beams to be incident to the fluorescent plate;
the fluorescent plate is used for receiving the incident convergent light beam and is excited by the convergent light beam to generate an excitation light beam;
the diaphragm is used for intercepting the excitation light beam;
the second collimation and shaping system is used for collimating the excitation light beam intercepted by the diaphragm to form a parallel excitation light beam with a set width;
the band-pass filtering system is used for filtering the parallel excitation light beams to obtain set wavelength parallel excitation light beams different from the wavelength of the first parallel light beams;
the polarizer is used for carrying out polarization treatment on the set wavelength parallel excitation light beam to form a linear polarization excitation light beam;
the first 1/4 wavelength plate is used for modulating the linearly polarized excitation beam into the circularly polarized excitation spot beam.
Further, the suppression spot formation system includes a first 1/2 wavelength plate, a second 1/4 wavelength plate, and a vortex phase plate;
the first 1/2 wavelength plate is used for modulating the first parallel light beam into a first modulated light beam with the phase difference of lambda/2 with the first parallel light beam;
the second 1/4 wavelength plate is used for modulating the incident first modulation light beam into a first circularly polarized light beam;
the vortex phase plate is used for modulating the incident first circularly polarized light beam into a beam for inhibiting the hollow facula.
Further, the light spot optical path adjusting system comprises a second reflecting mirror, a dichroic mirror and an objective lens;
the second reflecting mirror is used for enabling the hollow-spot light beam to be incident into the dichroic mirror;
the dichroic mirror is used for synthesizing the incident hollow light spot suppression light beam and the circular polarization excitation light spot light beam to form a synthesized light beam and irradiating the synthesized light beam into the objective lens;
and the objective lens is used for converging the incident synthetic light beam to form a diffraction limit light spot.
Further, the energy beam splitting system is an energy beam splitter.
Further, the divergence angle of the intercepted excitation light beam is +/-10 degrees by the diaphragm.
Further, the wavelength bandwidth of the set wavelength parallel excitation beam obtained after filtering by the band-pass filter system is similar to the wavelength bandwidth of the laser beam generated by the laser light source.
Compared with the prior art, the single light source super-resolution optical storage optical system disclosed by the invention has the following beneficial effects: because only one laser light source is provided, and the laser beams generated by the laser light source can be formed into the hollow light spot inhibiting light beam and the circular polarization excitation light spot beam with different wavelengths through the energy light splitting system, the light spot inhibiting forming system and the excitation light spot forming system so as to record information on the information material.
Drawings
FIG. 1 is a schematic diagram of a single light source super-resolution optical storage system according to the present invention;
FIG. 2 is a block diagram of a prior art dual beam super-resolution laser storage system;
fig. 3 is a schematic view of a suppression beam and an excitation beam acting on an information material.
In the figure: 1. the laser device comprises a laser light source, 2, a first collimation and shaping system, 3 an energy light splitting system, 4, a light spot suppression forming system, 40, a first 1/2 wavelength plate, 41, a second 1/4 wavelength plate, 42, a vortex phase plate, 5, an excitation light spot forming system, 50, a first reflector, 51, a first converging lens, 52, a fluorescent plate, 53, a diaphragm, 54, a second collimation and shaping system, 55, a band-pass filtering system, 56, a polarizer, 57, a first 1/4 wavelength plate, 6, a light spot light path adjusting system, 60, a second reflector, 61, a dichroic mirror, 62, an objective lens, 7 and an information recording material.
Detailed Description
Fig. 1 shows a single light source super-resolution optical storage system according to the present disclosure, which comprises,
a laser light source 1 for generating a laser beam;
a first collimation shaping system 2 for collimating the generated laser beam to form a parallel beam with a set width;
the energy splitting system 3 is used for splitting the incident parallel light beams to form first parallel light beams and second parallel light beams;
the suppression light spot forming system 4 is used for carrying out polarization and vortex processing on the incident first parallel light beam to form a suppression hollow light spot light beam with a diffraction limit hollow light spot;
the excitation light spot forming system 5 is used for carrying out fluorescence excitation and polarization processing on the incident second parallel light beam to form a circular polarization excitation light spot light beam with the wavelength different from that of the hollow light spot light beam;
and the light spot light path adjusting system 6 is used for converging the hollow light spot restraining beam and the circular polarization excitation light spot beam on an information recording material.
Specifically, in this embodiment, the laser light source is an LD laser light source, the laser light source generates a laser beam, the laser beam is incident on the first collimating and shaping system 2, in this embodiment, the first collimating and shaping system 2 uses a collimating lens, the first collimating and shaping system is configured to collimate and shape the laser beam to form a parallel beam having a set width, the parallel beam is incident on the energy splitting system 3, in this embodiment, the energy splitting system 3 is an energy beam splitter, a part of the parallel beam incident on the energy beam splitter transmits to form a first parallel beam, a part of the parallel beam reflects to form a second parallel beam, and the first parallel beam is incident on the inhibition spot forming system 4, in this embodiment, the inhibition spot forming system 4 uses the same structure as that of the inhibition spot forming system in the conventional two-beam super-resolution laser storage system, specifically, the inhibition spot forming system 4 includes a first 1/2 wavelength plate 40, A second 1/4 wavelength plate 41 and a vortex phase plate 42;
the first 1/2 wavelength plate 40 is used for modulating the first parallel light beam into a first modulated light beam with the phase difference of lambda/2 with the first parallel light beam;
the second 1/4 wavelength plate 41 is used for modulating the incident first modulated light beam into a first circularly polarized light beam;
the vortex phase plate 42 is configured to modulate the incident first circularly polarized light beam into a hollow spot suppression light beam, that is, the first parallel light beam passes through the first 1/2 wavelength plate, the second 1/4 wavelength plate, and the vortex phase plate to form a circularly polarized hollow light beam.
The second parallel light beam formed by reflection of the energy beam splitter is incident to an excitation light spot forming system 5, and the excitation light spot forming system 5 comprises a first reflector 50, a first converging lens 51, a fluorescent plate 52, a diaphragm 53, a second collimation and shaping system 54, a band-pass filter system 55, a polarizer 56 and a first 1/4 wavelength plate 57;
the first reflector 50 is configured to fold the incident second parallel light beam to make the second parallel light beam incident into the first converging lens 51;
the first converging lens 51 is configured to converge the incident second parallel light beams to form converging light beams, and the converging light beams are incident on the fluorescent plate 52;
the fluorescent plate 52 is used for receiving the incident converged light beam and generating an excitation light beam by excitation of the converged light beam, the fluorescent plate is made of a fluorescent material, laser is incident on the fluorescent material to excite fluorescence to emit light, and a proper fluorescent material is selected to excite fluorescence with a corresponding wavelength according to specific requirements;
the diaphragm 53 is used for intercepting the excitation light beam, and because the divergence angle of the excited fluorescent light source reaches 180 degrees, the fluorescence light source is intercepted through the diaphragm, and preferably, the divergence angle intercepted by the diaphragm is +/-10 degrees;
the second collimation and shaping system 54 is used for collimating the excitation beam intercepted by the diaphragm to form a parallel excitation beam with a set width;
the band-pass filter system 55 is configured to filter the parallel excitation light beam to obtain a set wavelength parallel excitation light beam different from the wavelength of the first parallel light beam, and since the wavelength range of the fluorescence generated by excitation is relatively wide, and the span can reach 100nm or more, the nonlinear conversion of the recording material cannot be realized, the band-pass filter system is configured to intercept the excited fluorescence, so that the wavelength range of the intercepted fluorescence is close to the wavelength width of the laser light beam generated by the laser light source, and preferably, the intercepted bandwidth is 1 nm;
the polarizer 56 is used for carrying out polarization treatment on the set wavelength parallel excitation light beam to form a linear polarization excitation light beam, the fluorescence after the filtering treatment by the band-pass filtering system is non-polarized light, and the polarizer is used for converting the fluorescence into linear polarized light;
the first 1/4 wavelength plate 57 is used for modulating the linearly polarized excitation light beam into circularly polarized light, i.e. the circularly polarized excitation light spot light beam.
The spot optical path adjusting system 6 includes a second reflecting mirror 60, a dichroic mirror 61, and an objective lens 62;
the second reflecting mirror 60 is used for enabling the hollow-spot light beam to be incident into the dichroic mirror;
the dichroic mirror 61 is configured to synthesize the incident hollow-spot-suppressing light beam and the circularly polarized excitation light beam to form a synthesized light beam, and the synthesized light beam is incident into the objective lens;
the objective lens 62 is configured to converge the incident combined light beam to form a diffraction-limited light spot, so that the hollow light spot light beam and the circular polarization excitation light spot light beam are inhibited from acting on the information recording material 7 together, and a material which is not affected by the inhibited light beam reacts with the excitation light beam to form an information recording point with a super-diffraction limit.
The single-light-source super-resolution optical storage optical system disclosed by the invention only has one laser light source, and can form the hollow light spot inhibiting light beam and the circular polarization exciting light spot beam with different wavelengths from the laser beam generated by the laser light source through the energy light splitting system, the light spot inhibiting forming system and the exciting light spot forming system so as to record information on an information material.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A single light source super-resolution optical storage optical system is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a laser light source (1) for generating a laser beam;
a first collimation shaping system (2) for collimating the generated laser beam to form a parallel beam having a set width;
an energy splitting system (3) for splitting the incident parallel light beam to form a first parallel light beam and a second parallel light beam;
the suppression light spot forming system (4) is used for carrying out polarization and vortex processing on the incident first parallel light beam to form a suppression hollow light spot light beam with a diffraction limit hollow light spot;
the excitation light spot forming system (5) is used for carrying out fluorescence excitation and polarization treatment on the incident second parallel light beam to form a circular polarization excitation light spot light beam with the wavelength different from that of the hollow light spot light beam;
and the light spot light path adjusting system (6) is used for converging the hollow light spot restraining beam and the circular polarization excitation light spot beam on an information recording material (7).
2. The single light source super-resolution optical storage system as defined in claim 1, wherein: the excitation light spot forming system (5) comprises a first reflector (50), a first converging lens (51), a fluorescent plate (52), a diaphragm (53), a second collimation and shaping system (54), a band-pass filtering system (55), a polarizer (56) and a first 1/4 wavelength plate (57);
the first reflector (50) is used for enabling the incident second parallel light beams to be incident to the first converging lens (51);
the first converging lens (51) is used for converging the incident second parallel light beams to form converging light beams which are incident to the fluorescent plate (52);
the fluorescent plate (52) is used for receiving the incident convergent light beam and generating an excitation light beam through excitation of the convergent light beam;
the diaphragm (53) is used for intercepting the excitation light beam;
the second collimation and shaping system (54) is used for collimating the excitation beam intercepted by the diaphragm (53) to form a parallel excitation beam with a set width;
the band-pass filter system (55) is used for filtering the parallel excitation light beam to obtain a set wavelength parallel excitation light beam different from the wavelength of the first parallel light beam;
the polarizer (56) is used for carrying out polarization processing on the set wavelength parallel excitation beam to form a linear polarization excitation beam;
the first 1/4 wavelength plate (57) is used for modulating the linear polarization excitation beam into the circular polarization excitation spot beam.
3. The single light source super-resolution optical storage system as defined in claim 2, wherein: the suppression spot formation system (4) comprises a first 1/2 wavelength plate (40), a second 1/4 wavelength plate (41), and a vortex phase plate (42);
the first 1/2 wavelength plate (40) is used for modulating the first parallel light beams into first modulated light beams with the phase difference of lambda/2 with the first parallel light beams;
the second 1/4 wavelength plate (41) is used for modulating the incident first modulation light beam into a first circularly polarized light beam;
the vortex phase plate (42) is used for modulating the incident first circularly polarized light beam into a hollow facula suppression beam.
4. The single light source super-resolution optical storage system as claimed in any one of claims 1 to 3, wherein: the light spot optical path adjusting system (6) comprises a second reflecting mirror (60), a dichroic mirror (61) and an objective lens (62);
the second mirror (60) for incidence of the suppressed hollow-spot beam into the dichroic mirror;
the dichroic mirror (61) is used for synthesizing the incident hollow-core-spot-inhibiting light beam and the circular-polarization-excitation-light-spot light beam into a synthesized light beam and enabling the synthesized light beam to be incident into the objective lens;
the objective lens (62) is used for converging the incident composite light beam to form a diffraction limit light spot.
5. The single light source super-resolution optical storage system as defined in claim 1, wherein: the energy spectroscope system is an energy spectroscope.
6. The single light source super-resolution optical storage system as defined in claim 2, wherein: the divergence angle of the diaphragm after intercepting the excitation light beam is +/-10 degrees.
7. The single light source super-resolution optical storage system as defined in claim 2, wherein: the wavelength bandwidth of the set wavelength parallel excitation beam obtained after filtering of the band-pass filtering system (55) is similar to the wavelength bandwidth of the laser beam generated by the laser light source.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114924423A (en) * | 2022-05-27 | 2022-08-19 | 中国华录集团有限公司 | Super-resolution optical storage area array writing optical system and information recording method |
| CN116067935A (en) * | 2023-04-06 | 2023-05-05 | 北京攸维医疗科技有限公司 | Super-resolution imaging method and device for single-beam light path |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5777342A (en) * | 1994-07-15 | 1998-07-07 | Baer; Stephen C. | Method and apparatus for microlithography |
| US20090121153A1 (en) * | 2005-01-16 | 2009-05-14 | Baer Stephen C | Single wavelength stimulated emission depletion microscopy |
| US20180120549A1 (en) * | 2016-10-27 | 2018-05-03 | Olympus Corporation | Microscope apparatus |
| CN108957720A (en) * | 2018-09-26 | 2018-12-07 | 中国科学院化学研究所 | Lighting system and STED optical microscopy for STED optical microscopy |
| CN109031635A (en) * | 2018-09-07 | 2018-12-18 | 苏州国科医疗科技发展有限公司 | A kind of two-photon stimulated emission depletion compound microscope |
| CN112034628A (en) * | 2020-08-25 | 2020-12-04 | 之江实验室 | High-flux super-diffraction limit focal spot generation device capable of being specifically regulated |
-
2021
- 2021-12-28 CN CN202111681301.1A patent/CN114280802A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5777342A (en) * | 1994-07-15 | 1998-07-07 | Baer; Stephen C. | Method and apparatus for microlithography |
| US20090121153A1 (en) * | 2005-01-16 | 2009-05-14 | Baer Stephen C | Single wavelength stimulated emission depletion microscopy |
| US20180120549A1 (en) * | 2016-10-27 | 2018-05-03 | Olympus Corporation | Microscope apparatus |
| CN109031635A (en) * | 2018-09-07 | 2018-12-18 | 苏州国科医疗科技发展有限公司 | A kind of two-photon stimulated emission depletion compound microscope |
| CN108957720A (en) * | 2018-09-26 | 2018-12-07 | 中国科学院化学研究所 | Lighting system and STED optical microscopy for STED optical microscopy |
| CN112034628A (en) * | 2020-08-25 | 2020-12-04 | 之江实验室 | High-flux super-diffraction limit focal spot generation device capable of being specifically regulated |
Non-Patent Citations (3)
| Title |
|---|
| 姜美玲: "超分辨光存储研究进展", 《光电工程》 * |
| 杨铁军: "《产业专利分析报告 第32册 新型显示》", 30 June 2015, 知识产权出版社 * |
| 王倩: "维度信息记录于再现技术的进展", 《影像科学与光化学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114924423A (en) * | 2022-05-27 | 2022-08-19 | 中国华录集团有限公司 | Super-resolution optical storage area array writing optical system and information recording method |
| CN116067935A (en) * | 2023-04-06 | 2023-05-05 | 北京攸维医疗科技有限公司 | Super-resolution imaging method and device for single-beam light path |
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