CN113759468B - Beam pattern processing device - Google Patents
Beam pattern processing device Download PDFInfo
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- CN113759468B CN113759468B CN202110891726.9A CN202110891726A CN113759468B CN 113759468 B CN113759468 B CN 113759468B CN 202110891726 A CN202110891726 A CN 202110891726A CN 113759468 B CN113759468 B CN 113759468B
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- 238000012545 processing Methods 0.000 title claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 22
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/34—Optical coupling means utilising prism or grating
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
Abstract
The invention discloses a light beam processor, which comprises a prism, a lens and a carrier, wherein the prism, the lens and the carrier are made of light transmission materials, and the prism and the lens are arranged on the same light path and are respectively arranged on the carrier. The lens is arranged on the incidence surface or the emergent surface of the prism, a plurality of mode conversion structures are arranged on the phase plate surface of the prism, the incidence surface, the reflecting surface, the phase plate surface and the emergent surface of the beam mode processing device are all arranged on the prism to form an integrated structure, and the beam mode processing device which is compact in structure and easy to manufacture and capable of forming mode multiplexing and mode demultiplexing of the beam through the combined action of the prism and the lens.
Description
Technical Field
The present invention relates to the field of optical communications technologies, and in particular, to a beam mode processing apparatus.
Background
With the development of technology, higher requirements are put on information transmission technology. Where the mode multiplexing and demultiplexing scheme of light becomes an important issue to be addressed. Existing mode multiplexing and demultiplexing schemes are largely divided into mode multiplexing based on fiber architecture and mode multiplexing based on spatial optical elements. In the mode division multiplexing technology based on the space optical element, taking a common four-mode multiplexing scheme as an example, four incident lights of an array are coupled, four reflections are carried out between a phase plate and a reflecting mirror, emergent lights are combined into a beam of light carrying four mode information, the mode multiplexing mode is carried out, the mode demultiplexing mode is carried out, and from the optical aspect, a beam of light with the four mode information is separated into four beams of light of the array after being reflected by the demultiplexed phase plate and the reflecting mirror.
However, the existing mode multiplexing/demultiplexing phase plate and the reflecting mirror need to be coupled in a high-precision alignment manner, so that the space and the position of the pattern on the phase plate are fixed, and the incident light source needs to be coupled to the theoretical incident angle to reach the phase plate, so that the high parallelism of the pattern and the pattern is ensured, and the light beam can be accurately beaten on the corresponding phase pattern after each reflection, therefore, the whole scheme has the advantages of complex process, small process tolerance, low packaging efficiency and high production difficulty.
Accordingly, there is a need for a beam pattern processing apparatus of a novel structure to solve the above-described problems.
Disclosure of Invention
In view of this, the object of the present invention is: a compact and easy-to-manufacture beam pattern processing apparatus is provided.
In order to achieve one or a part or all of the above or other objects, the present invention provides a beam pattern processing apparatus, including a prism made of a light transmitting material, a lens, and a carrier, where the prism and the lens are disposed on the same optical path and are disposed on the carrier respectively; the prism has: the light beam reflection device comprises a prism, an incidence surface, a phase plate surface, a plurality of mode conversion structures, a reflection surface and an emergent surface, wherein the incidence surface is arranged on a first side of the prism, the phase plate surface is arranged on one side of the prism opposite to the incidence surface, the phase plate surface is provided with the plurality of mode conversion structures, the plurality of mode conversion structures are uniformly distributed along the length direction of the phase plate surface and are used for forming light beams with different modes, the reflection surface is arranged on one side of the prism opposite to the phase plate surface, the reflection surface and the phase plate surface are used together to enable the light beams to form light beams with the plurality of modes through repeated reflection in the prism, the emergent surface is arranged on a second side of the prism and is parallel to the incidence surface, and the emergent surface is used for enabling the light beams with the plurality of modes to be emitted out of the prism; the lens is disposed on the incident surface or the exit surface.
Optionally, the lens is an incident light collimating lens, and the incident light collimating lens is arranged on the incident surface; or the lens is an emergent light focusing lens, and the emergent light focusing lens is arranged on the emergent surface; alternatively, the lens includes an incident light collimating lens disposed on the incident surface and an outgoing light focusing lens disposed on the outgoing surface.
Optionally, the optical collimator further comprises an incident light source, wherein the incident light source is arranged at the front end of the incident surface, so that the light beam emitted by the incident light source is vertically incident on the incident surface after passing through the collimating lens.
Optionally, the optical detector is arranged at the front end of the emergent surface, so that emergent light converted by the prism is emitted into the optical detector after passing through the focusing lens.
Optionally, the mode conversion structure is etched on the phase plate surface.
Optionally, an optical reflection enhancing film is arranged on the phase plate surface and/or the reflection surface.
Optionally, an inclination angle is formed between the incident surface and/or the emergent surface and the end surface of the prism.
Optionally, the entrance face and the exit face are disposed at opposite corners of the prism.
Optionally, the prism is formed by combining a plurality of light-transmitting blocks, and the light-transmitting blocks are in an integrally formed structure or are adhered to each other to form an integrally formed structure.
Optionally, the optical paths between adjacent mode converting structures are equal.
The implementation of the invention has the following beneficial effects:
the lens is arranged on the incidence surface or the emergent surface of the prism, a plurality of mode conversion structures are arranged on the phase plate surface of the prism, the incidence surface, the reflecting surface, the phase plate surface and the emergent surface of the beam mode processing device are all arranged on the prism to form an integrated structure, and the beam mode processing device which is compact in structure and easy to manufacture and capable of forming mode multiplexing and mode demultiplexing of the beam through the combined action of the prism and the lens.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a beam pattern processing apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a beam pattern processing apparatus according to a second embodiment of the present invention;
FIG. 3 is a schematic view of a first embodiment of a prism of the present invention;
FIG. 4 is a schematic view of a second embodiment of a prism of the present invention;
FIG. 5 is a schematic view of a third embodiment of a prism of the present invention;
FIG. 6 is a schematic view of a fourth embodiment of a prism of the present invention;
fig. 7 is a schematic view of a prism according to a fifth embodiment of the present invention.
In the figure: 10 60-prism; 11-incidence plane; 12-phase plate surface; 13-a reflective surface; 14-an exit face; p1, P2, P3, P4-mode converting structure; 15-a first reflecting portion; 16-a second reflecting portion; 20-lens; 21-an incident light collimating lens; 22-an outgoing light focusing lens; 30-carrier; 40-a light source; 61-a first light block; 611-incidence plane; 612-first phase plate; 613-a second phase plate; 614-a first reflective surface; 615-a second reflective surface; 62-a second light block; 621-a third reflective surface; 63-a third light block; 631-a fourth reflective surface; 632-exit face.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is referred to in the embodiment of the present invention, the directional indication is merely used to explain a relative positional relationship, a movement condition, and the like between the components in a specific posture (shown in the drawings), and if the specific posture is changed, the directional indication is correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The embodiment of the invention discloses a beam mode processing device, which is characterized in that a plurality of mode conversion structures are arranged on a phase plate surface of a prism, an incident surface and an emergent surface of the prism are arranged in parallel, a lens is arranged on the incident surface or the emergent surface, and a beam forms mode multiplexing and mode de-multiplexing of the beam through the prism and the lens.
Fig. 1 is a schematic diagram of a first embodiment of a beam pattern processing apparatus according to the present invention, and referring to fig. 1, the beam pattern processing apparatus includes a prism 10 made of a light transmitting material, a lens 20, and a carrier 30, and the lens 20 includes an incident light collimating lens 21 and an emergent light focusing lens 22. The prism 10 has a pair of opposite sides parallel to the pair of opposite sides of the carrier 30, and the incident light collimating lens 21, the emergent light focusing lens 22 and the prism 10 are disposed on the same optical path and are disposed on the carrier 30 respectively, so that the longitudinal dimension of the beam mode processing device is small, and the overall size is small, so that the beam mode processing device is convenient to be mounted in a narrow mounting space, more particularly, in an optical module. Here, the outgoing light focusing lens 22 may be a Gradient-index (GRIN) lens, and the optical imaging element is designed and manufactured using a medium having a Gradient refractive index. The prism 10 has an incidence plane 11, a phase plate surface 12, a reflection plane 13, and an emission plane 14, the incidence plane 11 and the emission plane 14 are disposed parallel to each other, and an emission light focusing lens 22 is disposed at the front end of the emission plane 14 such that an emission light is emitted from the emission light focusing lens 22. Specifically, after the light beam is perpendicularly incident through the incident surface 11 of the prism 10, the light beam is transmitted through the prism 10, and then is emitted from the emitting surface 14 through the emitting light focusing lens 22 disposed corresponding to the emitting surface 14 to be combined into a light beam having a plurality of modes.
In some embodiments, the incident light collimating lens 21 is a lens array.
In some embodiments, the beam mode processing device further includes a light source 40, the light source 40 is disposed at the front end of the incident surface 11 of the prism 10, the light source 40 is disposed perpendicular to the incident surface 11, the incident beam enters the incident surface 11 perpendicularly after passing through the incident light collimating lens 21, is reflected by the mode conversion structure on the phase plate 12, is reflected by the reflective surface 13, is converted by the plurality of mode conversion structures in the prism 10, and finally is emitted from the emitting surface 14 through the emitting light focusing lens 22 disposed perpendicularly to the emitting surface 14, so as to form a mode multiplexing of the light. It should be noted that, the number of the mode conversion structures on the phase plate is not limited in this embodiment, and in a specific application scenario, a plurality of mode conversion structures are set on the phase plate 12 according to needs, so that a light beam with a plurality of modes can be formed.
Fig. 2 is a schematic diagram of a second embodiment of the beam pattern processing apparatus according to the present invention, referring to fig. 2, the beam pattern processing apparatus includes a prism 10 made of transparent material, a lens 20, a carrier 30, and a photodetector 50, wherein a set of opposite sides of the prism 10 are disposed parallel to a set of opposite sides of the carrier 30, and the lens 20, the prism 10, and the photodetector 50 are disposed on the same optical path and are disposed on the carrier 30 respectively. The lens 20 includes an incident light collimating lens 21 and an outgoing light focusing lens 22. The incident light collimator lens 21 is used to convert a point light source into collimated light, and the outgoing light focusing lens 22 is used to convert the collimated light into a point light source. The prism 10 has an incident surface 11, a phase plate surface 12, a reflective surface 13 and an exit surface 14, the incident surface 11 and the exit surface 14 are parallel to each other, an incident light collimating lens 21 is disposed at the front end of the incident surface 11 and perpendicular to the incident surface 11, so that a light beam passes through the incident light collimating lens 21 and then perpendicularly enters the incident surface 11, and then is reflected by the phase plate surface 12 and the reflective surface 13, and after passing through a plurality of mode conversion structures in the prism 10, the light beam is input from the exit surface 14 to a lens array disposed perpendicular to the exit surface 14 through an exit light focusing lens 22, is converged into a point light source, and then enters a plurality of light detectors 50, thereby dividing a light beam with a plurality of modes into a plurality of light beams, and realizing demultiplexing of the light beam.
In some embodiments, the lens 20 may also be selectively omitted or installed in the beam processor to accommodate the usage scenario requirements, depending on the circumstances of the specific application scenario, specifically, the device that interfaces with the beam pattern processing device in the embodiment of the present invention is already provided with the lens 20.
Fig. 3 is a schematic view of a first embodiment of a prism according to the present invention, fig. 4 is a schematic view of a second embodiment of a prism according to the present invention, and referring to fig. 3 and 4, a prism 10 has an incident surface 11, and the incident surface 11 is disposed on a first side of the prism 10, for receiving an incident light beam; the phase plate surface 12 is arranged on one side of the prism 10 opposite to the incident surface 11, the side of the prism 10 opposite to the phase plate surface 12 is provided with a reflecting surface 13, and the reflecting surface 13 and the phase plate surface 12 cooperate to enable light beams to be emitted from the emergent surface 14 after being reflected for multiple times in the prism, and the emergent surface 14 is parallel to the incident surface 11. The phase plate 12 is provided with a plurality of mode conversion structures uniformly distributed along the length direction of the phase plate 12, the mode conversion structures are used for converting light beams into light beams with a plurality of modes, and under the combined action of the reflecting surface 13 and the phase plate 12, the light beams are reflected by the mode conversion structures to be synthesized into single-beam light with a plurality of modes, and the single-beam light is emitted from the emitting surface 14, so that the mode multiplexing of the light is formed. The prism 10 is in a cube structure as a whole, and the phase plate surface 12 and the reflecting surface 13 are arranged on a group of opposite sides of the prism 10, which are parallel to each other.
In some embodiments, 4 mode conversion structures (P1, P2, P3, P4) are disposed on the phase plate 12, and 4 parallel light beams are perpendicularly incident on the incident surface 11, and are combined into a single beam light beam with four modes after passing through the mode conversion structures P1, P2, P3 and P4 in sequence through multiple reflections in the prism 10, so that multiplexing of 4 modes of light beams is achieved, and transmission bandwidth is increased.
In some embodiments, the mode conversion structure (P1, P2, P3, P4) is etched on the phase plate surface 12, so that the prism has higher integrity, and compared with the split type scheme of setting the phase plate surface 12 and the reflective surface 13 at intervals by air, the overall volume of the prism can be reduced. More integral prisms of this embodiment allow the light beam to propagate in a solid medium that has a greater refractive index than air, which results in a shorter distance of light beam transmission within prism 10 than if the light beam transmission were performed in an air medium, thereby further reducing the volume of prism 10. By arranging the incident surface 11 and the exit surface 14 parallel to each other, the light beam is transmitted in the prism 10 in an overall N-shape, and compared with the prior art in which the light beam is transmitted in an N-shape, the volume of the prism 10 can be further reduced. As can be seen from the above description, in this embodiment, at least the integral solid medium prism with refractive index greater than that of air is arranged to reduce the transmission distance of light under the same optical path, and the incident surface 11 and the exit surface 14 are arranged in parallel to each other, so that the two technical means of transmitting light in N shape cooperate to reduce the volume of the prism, thereby the prism 10 of this embodiment can be installed in a narrow space, more specifically, in an optical module.
In some embodiments, an optical reflection enhancement film is provided on one or both of the phase plate 12 and the reflection surface 13 to enhance the light beam transmission efficiency in the prism 10.
In some embodiments, the incident surface 11 and the exit surface 14 have an inclination angle with the end surface of the prism 10, so that the prism 10 is arranged in an inclined manner on the premise that the incident surface 11 and the exit surface 14 are guaranteed to be parallel to each other, and the transverse space occupied by the prism 10 in the installation process is reduced.
In some embodiments, the incident surface 11 and the exit surface 14 are disposed at opposite angles of the prism 10, so that the space of the prism is fully and reasonably utilized, and the volume of the prism 10 is ensured to be minimum under the same beam transmission requirement.
In some embodiments, the first embodiment has an incident angle α, and the second embodiment has an incident angle β, where β is less than α, such that the overall volume of the second embodiment is less than the overall volume of the first embodiment due to the arrangement of the incident angles directly affecting the pitch of adjacent mode conversion structures. Taking the incident angles of 10 ° and 5 ° as an example, setting the incident angle of the light beam to 10 ° to be incident on the incident surface 11 and setting the incident angle of the light beam to 5 ° to be incident on the incident surface 11, the volume of the latter prism 10 is half that of the former prism 10 due to the difference in the incident angles, and the volume of the prism 10 can be significantly reduced. It should be noted that, the specific angle of the incident angle is not limited in this embodiment, and may be selected according to the needs in the practical application process, which should be all the protection scope of the present invention.
Fig. 5 is a schematic view of a third embodiment of the prism according to the present invention, and referring to fig. 5, the third embodiment is different from the first embodiment in that the incident surface 11 coincides with the reflective surface 13, the exit surface 14 coincides with the phase plate surface 12, and a first reflective portion 15 and a second reflective portion 16 are disposed on a set of opposite sides of the prism 10. The light beam is incident on the incident surface 11, reflected by the mode conversion structure P1 through the first reflecting portion 15, then reflected by the mode conversion structure P2, the mode conversion structure P3, and the mode conversion structure P4 through the mode conversion structure P2, the mode conversion structure P3, and the mode conversion structure P4 in the prism 10, and then emitted from the emitting surface 14 through the second reflecting portion 16.
Fig. 6 is a schematic view of a fourth embodiment of the prism of the present invention, referring to fig. 6, the fourth embodiment is different from the third embodiment in that the first reflecting portion 15 is located at one end of the reflecting surface 13 and has an inclination angle with respect to the reflecting surface 13. The light beam is reflected to the mode conversion structure P1 by the first reflecting portion 15 after passing through the incident surface 11, is reflected on the reflecting surface 13 by the mode conversion structure P1, and then passes through the mode conversion structure P2, the mode conversion structure P3 and the mode conversion structure P1 under the action of the reflecting surface 13 and the phase plate surface 12.
Fig. 7 is a schematic diagram of a prism according to a fifth embodiment of the present invention, and referring to fig. 7, a prism 60 includes a first light-transmitting block 61, a second light-transmitting block 62, and a third light-transmitting block 63, where the first light-transmitting block 61, the second light-transmitting block 62, and the third light-transmitting block 63 are integrally formed, specifically, may be integrally formed, or may be integrally formed by bonding a light-transmitting glue solution. The first light-transmitting body 61 has an incident surface 611, a first phase plate 612, a second phase plate 613, a first reflecting surface 614 and a second reflecting surface 615, and an inclination angle is formed between the first reflecting surface 614 and the incident surface 611. The first phase plate 612 is disposed adjacent to the second phase plate 613, the first reflective surface 614 is disposed adjacent to the second reflective surface 615, the prism 60 has a trapezoid structure as a whole, and the first phase plate 612 and the second phase plate 613 are respectively etched with a mode conversion structure P1, a mode conversion structure P2, a mode conversion structure P3, and a mode conversion structure P4. The second light-transmitting block 62 is provided with a third reflecting surface 621, and the third reflecting surface 621 is disposed opposite to the first phase plate surface 612 and the second phase plate surface 613. The third light-transmitting block 63 has a fourth reflecting surface 631 and an emitting surface 632, and the emitting surface 632 is disposed opposite to the incident surface 611, the first phase plate surface 612, and the second phase plate surface 613. After the light beam is incident from the incident surface 611, the light beam is reflected by the first reflecting surface 614 to the mode converting structure P2, then is reflected by the third reflecting surface 621 to the mode converting structure P3, then is reflected by the second reflecting surface 615 to the mode converting structure P4, and finally is emitted from the emitting surface 632 through the fourth reflecting surface 631. The reflection of the light beam in the horizontal and vertical directions within the prism 60 in this embodiment allows the light beam to achieve mode multiplexing of the light beam in the small-sized prism 60.
In some embodiments, the second light-transmitting body 62 and the third light-transmitting body 63 are identical in structural shape and are integrally right trapezoid-shaped.
Further, in the above embodiment, two adjacent mode conversion structures are used as one group, and the optical paths between every two adjacent mode conversion structures are equal. Specifically, taking a prism having 4 mode conversion structures as an example, the optical path between the mode conversion structure P1 and the mode conversion structure P2, the optical path between the mode conversion structure P2 and the mode conversion structure P3, and the optical path between the mode conversion structure P3 and the mode conversion structure P4 are all equal. Embodiments of the present invention are not limited in the number of mode-converting structures, and specific mode-converting structures may be increased or decreased as desired.
The mode conversion structure in the embodiment of the invention is a specific micro-nano structure pattern formed by processing the light mode according to different light modes.
The prism in the embodiment of the invention is made of light-transmitting materials such as glass, silicon, resin, light-transmitting plastic and the like.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The beam mode processing device is characterized by comprising a prism, a lens and a carrier, wherein the prism is made of light transmission materials, the prism and the lens are arranged on the same light path and are respectively arranged on the carrier;
the prism has:
an incident surface disposed on a first side of the prism,
a phase plate surface arranged on one side of the prism opposite to the incident surface and provided with a plurality of mode conversion structures which are uniformly distributed along the length direction of the phase plate surface and are used for forming light beams with different modes,
a reflecting surface arranged on one side of the prism opposite to the phase plate surface, wherein the reflecting surface and the phase plate surface cooperate to enable the light beam to form light beams with a plurality of modes through multiple reflections inside the prism,
an exit surface disposed on a second side of the prism and parallel to the entrance surface, the exit surface being configured to allow the light beam having the plurality of modes to exit the prism;
the lens is disposed on the incident surface or the exit surface.
2. The beam pattern processing apparatus according to claim 1, wherein the lens is an incident light receiving collimator lens provided on the incident surface; or,
the lens is an emergent light receiving focusing lens, and the emergent light receiving focusing lens is arranged on the emergent surface; or,
the lens comprises an incident light collimating lens and an emergent light focusing lens, the incident light collimating lens is arranged on the incident surface, and the emergent light focusing lens is arranged on the emergent surface.
3. The beam pattern processing apparatus according to claim 1 or 2, further comprising an incident light source provided at a front end of the incident surface such that a beam emitted from the incident light source is vertically incident on the incident surface after passing through the collimator lens.
4. A beam pattern processing apparatus according to claim 3, further comprising a photodetector disposed at a front end of the exit surface such that the exit light converted by the prism is incident on the photodetector through the focusing lens.
5. The beam pattern processing apparatus according to claim 1 or 2, wherein the pattern conversion structure is etched on the phase plate surface.
6. The beam pattern processing apparatus according to claim 5, wherein an optical reflection enhancing film is provided on the phase plate surface and/or the reflection surface.
7. Beam pattern processing device according to claim 1 or 2, characterized in that the entrance face and/or the exit face has an inclination angle with the end face of the prism.
8. The beam pattern processing apparatus according to claim 7, wherein the entrance face and the exit face are disposed at opposite corners of the prism.
9. The beam pattern processing apparatus according to claim 1 or 2, wherein the prism is formed by combining a plurality of light-transmitting blocks, the plurality of light-transmitting blocks being of an integrally formed structure or being integrally formed by bonding to each other.
10. A beam pattern processing apparatus according to claim 1 or 2, wherein optical paths between adjacent ones of the pattern conversion structures are equal.
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| US10534189B2 (en) * | 2012-11-27 | 2020-01-14 | The Board Of Trustees Of The Leland Stanford Junior University | Universal linear components |
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Address after: Room 1202, Building 1, Dongjiu Innovation Technology Park Phase 1, No. 76 Bulan Road, Xialilang Community, Nanwan Street, Longgang District, Shenzhen City, Guangdong Province, 518100 Patentee after: SHENZHEN OPTICS VALLEY TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 518100 Room 301, floor 3, building 41, Dayun software Town, No. 8288, Longgang Avenue, Yuanshan street, Longgang District, Shenzhen, Guangdong Patentee before: SHENZHEN OPTICS VALLEY TECHNOLOGY Co.,Ltd. Country or region before: China |