CN107991835B - Optical projection system and method are expanded based on micro-nano structure palarization multiplexing short focus - Google Patents
Optical projection system and method are expanded based on micro-nano structure palarization multiplexing short focus Download PDFInfo
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- CN107991835B CN107991835B CN201711131132.8A CN201711131132A CN107991835B CN 107991835 B CN107991835 B CN 107991835B CN 201711131132 A CN201711131132 A CN 201711131132A CN 107991835 B CN107991835 B CN 107991835B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
Abstract
The present invention provides a kind of optical projection system and method.Wherein, optical projection system includes: the optical signal generating apparatus set gradually along optical path, for generating the signal light for carrying the information of each subgraph with each subgraph of preset order CYCLIC LOADING；Deflection device is played, for signal light to be converted to polarised light；Micro-nano aerial array, for every beam polarised light to be converted to the different emergent light of multi beam polarization state；Analyzer, by a kind of corresponding outgoing light output of polarization state of each subgraph in image planes；A kind of polarization state is determining according to preset rules.Projecting method includes: to generate the signal light for carrying the information of each subgraph with each subgraph of preset order CYCLIC LOADING；Signal light is converted into polarised light；Every beam polarised light is converted into the different emergent light of multi beam polarization state；By a kind of outgoing light output of the corresponding polarization state determined according to preset rules of each subgraph in image planes.A kind of optical projection system and method provided by the invention, reduce the volume of optical projection system.
Description
Technical field
The present invention relates to Application Optics technical fields, more particularly, to a kind of optical projection system and method.
Background technique
Currently, a developing direction of the micro-nano structure as new type superthin optical texture, is widely used in polarizing film, vector
Light beam building, planar lens building, holographic display etc..With with nano-scale structures list similar in lambda1-wavelength scale
Member electromagnetic response characteristic, be able to achieve the phase to incident light, amplitude modulation function and obtain light polarization conversion, light beam meeting
Poly- and diverging and hologram image such as show at the functions.Just because of micro-nano structure is close with optical wavelength scale, to get rid of tradition
The excessive defect of optical element scale, and apply in microstructure optical system, it is provided simultaneously with high-precision, limited without size shape
The advantages of.
Micro-nano antenna is a kind of micro-nano structure, is widely used in nano laser, surface spectrum enhancing, nonlinear optical effect
The fields such as enhancing, hypersensitive optical sensing, sub-wavelength resolution imaging.
Micro-nano aerial array is combined by multiple groups micro-nano aerial array and is constituted.Every group of micro-nano array is by multiple energy respectively
Realize that the micro-nano antenna of 0-2 π Gradient Phase modulation is constituted.Wherein, micro-nano antenna structure can be but be not limited only to be bar-like gold
Belong to structure.Micro-nano aerial array is currently employed for light field building, does not apply in optical system temporarily.
Optical system (optical system) refer to by a variety of optical elements such as lens, reflecting mirror, prism and diaphragm by
The system that one graded is combined into.
Optical projection system is a kind of common optical system.Existing optical projection system, which is used, includes optical waveguide, prism, Duo Getou
The optical system of mirror, by realizing the synthesis of tri- components of RGB of image and amplifying the image information at light source, project extremely
At image planes, realization display image refreshing can be refreshed by carrying out signal light at light source.Existing optical projection system use including optical waveguide,
A large amount of traditional optical elements such as prism group, lens group, overall volume is big, and structure is complicated, carries out required tune during Projection Display
Whole parameter is more, affected by environment big.
Summary of the invention
To overcome the biggish deficiency of volume existing for existing optical projection system, the present invention provides a kind of optical projection system and method.
According to an aspect of the present invention, a kind of optical projection system is provided, comprising: the optical signal set gradually along optical path occurs
Device, for generating the signal light for carrying the information of each subgraph with each subgraph of preset order CYCLIC LOADING；Its
In, the subgraph is a part that image is split to form by preset rules, and all subgraphs are sliceable for the complete figure
Picture；Deflection device is played, for the signal light to be converted to polarised light；Micro-nano aerial array, for turning every Shu Suoshu polarised light
It is changed to the different emergent light of multi beam polarization state；The total phase of the beam number of the emergent light and the divided subgraph of described image
Together；Analyzer, for by a kind of corresponding outgoing light output of polarization state of each subgraph in image planes；Described one
Kind polarization state is determined according to the preset rules.
Preferably, the back side of the micro-nano aerial array is coated with reflectance coating；The reflectance coating is for reflecting the emergent light；
Correspondingly, between described deflection device and the micro-nano aerial array further include: optical splitter, for deflection device outgoing described will to be played
The polarized light transmission to the micro-nano aerial array on, and the emergent light that the reflectance coating is reflected be reflected into it is described
On analyzer.
Preferably, the multiple that the frame number of the optical signal generating apparatus load subgraph per second is 24.
Preferably, according to the preset rules by described image in a vertical direction or divided in horizontal direction be three subgraphs
Picture；Correspondingly, described deflection device is the polarizer, for the signal light to be converted to linearly polarized light.
Preferably, according to the preset rules by described image in a vertical direction or divided in horizontal direction be two subgraphs
Picture；Correspondingly, described deflection device includes the polarizer set gradually along optical path, for the signal light to be converted to linear polarization
Light；Quarter-wave plate, for the linearly polarized light to be converted to circularly polarized light.
Preferably, optical projection system further include: image segmentation device is connect with the optical signal generating apparatus, is used for basis
The preset rules by described image in a vertical direction or divided in horizontal direction be multiple subgraphs.
According to an aspect of the present invention, a kind of projecting method is provided, comprising: S1, each with preset order CYCLIC LOADING
Subgraph generates the signal light for carrying the information of each subgraph；Wherein, the subgraph is image by preset rules point
A part made of cutting, sliceable all subgraphs are complete described image；S2, the signal light is converted into polarised light；
S3, every Shu Suoshu polarised light is converted into the different emergent light of multi beam polarization state；The beam number and described image quilt of the emergent light
The sum of the subgraph of segmentation is identical；S4, a kind of corresponding outgoing light output of polarization state of each subgraph is existed
In image planes；A kind of polarization state is determined according to the preset rules.
Preferably, before the step S1 further include: S0, according to the preset rules by described image in a vertical direction or
Divided in horizontal direction is multiple subgraphs.
Preferably, the step S0 is specifically included: according to the preset rules that described image is in a vertical direction or horizontal
Direction is divided into three subgraphs；Correspondingly, the polarised light in the step S2 is linearly polarized light.
Preferably, the step S0 is specifically included: according to the preset rules that described image is in a vertical direction or horizontal
Direction is divided into two subgraphs；Correspondingly, the polarised light in the step S2 is circularly polarized light.
A kind of optical projection system and method provided by the invention, by high-frequency, each section of CYCLIC LOADING image, to incidence
Signal light carry out polarization conversion and polarization state selection, so that each section timesharing of image, subregion is shown in image planes, and is passed through
Suitable light path design, makes one to arrive complete image soon, realizes projection based on micro-nano structure, greatly reduces throwing
The volume of shadow system.
Detailed description of the invention
Fig. 1 is the schematic diagram that micro-nano of embodiment of the present invention aerial array carries out polarization conversion；
Fig. 2 is the schematic diagram that micro-nano of embodiment of the present invention aerial array carries out polarization conversion；
Fig. 3 is a kind of schematic diagram of optical projection system of the embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of optical projection system of the embodiment of the present invention；
Fig. 5 is a kind of schematic diagram of optical projection system of the embodiment of the present invention；
Fig. 6 is a kind of schematic diagram of optical projection system of the embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of optical projection system of the embodiment of the present invention；
Fig. 8 is a kind of flow chart of projecting method of the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
The micro-nano aerial array in the present invention is illustrated first.
Micro-nano aerial array is constructed by micro-nano structure, can be used as polarizing film.Micro-nano aerial array is by scale close to incidence
The micro-nano antenna of optical wavelength is constituted.Each micro-nano antenna can be used as a modulation unit.According to the electromagnetism of single modulation unit
The phase and Polarization Modulation result that characteristic is formed carry out micro-nano modulation unit array, i.e. the design of micro-nano aerial array is able to achieve
Incident polarised light is converted into multi beam polarised light.
It should be noted that the left circularly polarized light and right-circularly polarized light in the embodiment of the present invention are from incident direction
It sees.
Fig. 1 is the schematic diagram that micro-nano of embodiment of the present invention aerial array carries out polarization conversion.As shown in Figure 1, micro-nano antenna
Array 3 is made of the micro-nano antenna 31 arranged in a certain way on substrate and substrate.It is micro- for being arranged with the one side of micro-nano antenna 31
Receive the front of aerial array, the one side for not arranging micro-nano antenna 31 is the back side 32 of micro-nano aerial array.It is arranged in optical path micro-
Receive aerial array 3 when, the front of incident light from micro-nano aerial array 3 is incident.
When a branch of linearly polarized light 101 is incident, linearly polarized light 101 is converted to left circularly polarized light by micro-nano aerial array 3
104 and right-circularly polarized light 102, while retaining linear polarization component 103, become can load image information three beams emergent light.It is left
Rounding polarised light 104 and right-circularly polarized light 102 are respectively with angle of transmissionWithSeparation normal two sides.
Fig. 2 is the schematic diagram that micro-nano of embodiment of the present invention aerial array carries out polarization conversion.As shown in Fig. 2, working as a branch of circle
Polarised light 201 is with incidence angle θiWhen incident, circularly polarized light 201 is converted to the derotation of incident light to polarization by micro-nano aerial array 3
Light 202 and with rotation direction polarised light 203, constitute can load image information two beam emergent lights.Derotation to polarised light 202 be extraordinary
Light, angle of transmission areIt is ordinary light with rotation direction polarised light 203, angle of transmission is
By plating reflectance coating at the back side of micro-nano aerial array, this polarization conversion function equally can be real in reflected light
It is existing.
Basic principle of the invention is: the above-mentioned property based on micro-nano aerial array, by each portion of image to be projected
Timesharing is divided to be shown in the different location in image planes；By selecting the polarization state of the emergent light of micro-nano aerial array, make each of image
Positional relationship of a part in image planes is corresponding with the positional relationship of various pieces in image；By selecting suitable micro-nano antenna
The incidence angle of arrangement mode and polarised light makes to be shown in the side edge of the image adjacent part in image planes；It is suitable by selecting
The various pieces of image be shown in the interval time in image planes, using the persistence of vision of human eye, human eye will be seen in image planes
Be that the various pieces of the image shown by timesharing are spliced into complete image.
Fig. 3 is a kind of schematic diagram of optical projection system of the embodiment of the present invention.As shown in figure 3, a kind of optical projection system includes: along light
The optical signal generating apparatus 1 that road is set gradually, for generating and carrying each subgraph with each subgraph of preset order CYCLIC LOADING
The signal light of the information of picture；Wherein, subgraph is a part that image is split to form by preset rules, and all subgraphs are sliceable
For complete image；Deflection device 2 is played, for signal light to be converted to polarised light；Micro-nano aerial array 3, for polarizing every beam
Light is converted to the different emergent light of multi beam polarization state；The beam number of emergent light is identical as the sum of the divided subgraph of image；Inspection
Inclined device 4, for exporting a kind of corresponding emergent light 6 of polarization state of each subgraph in image planes；A kind of polarization state is according to pre-
If rule determines.
Different from traditional optical projection system based on lens group, a kind of optical projection system provided in an embodiment of the present invention is along optical path
It is disposed with optical signal generating apparatus 1, plays deflection device 2, micro-nano aerial array 3 and analyzer 4.
Optical projection system provided by the invention can be realized by transmission mode.
Optical signal generating apparatus 1 follows each subgraph for the image A divided according to preset rules with preset order
Ring load.Image A be divided into n subgraph A1, A2 ..., An, each subgraph is a part of image A, and all son
Image A1, A2 ..., An it is sliceable be complete image A.For example, optical signal generating apparatus 1 is with A1-A2- ..., the sequence of-An is followed
The subgraph of ring load image A, i.e. optical signal generating apparatus 1 successively load subgraph A1-A2- ...-An-A1-A2- ...-An- ...
Each subgraph of image A is shown in each of interval time in image planes and 1 load image A of optical signal generating apparatus
The interval time of a subgraph is identical.In order to which the interval time for being shown in each subgraph of image A in image planes meets human eye
The interval time of the condition of the persistence of vision, each subgraph of 1 load image A of optical signal generating apparatus should also meet human eye vision
The condition persisted.
Preferably, optical signal generating apparatus 1 is micro-display.Micro-display is the minimum display of planar dimension, can be small
In 1 inch.
Below by taking the subgraph A1 of image A as an example, illustrate communication process of the light in the optical path of the embodiment of the present invention.
After optical signal generating apparatus 1 loads subgraph A1, the signal light for carrying the information of subgraph A1 is generated.
The signal light of the information of subgraph A1 is carried along paths, has been incident on deflection device 2.Playing deflection device 2 will be incident
Signal light be converted to carry subgraph A1 information polarised light.
The polarised light for carrying the information of subgraph A1 continues to propagate along optical path, is incident on micro-nano aerial array 3.Every beam carries
The polarised light of the information of subgraph A1 is incident on micro-nano aerial array 3, by the polarization conversion of micro-nano aerial array 3, is emitted more
Beam carries the emergent light of the information of subgraph A1.For the polarised light with a branch of incidence, the beam number and image of emergent light are divided
Subgraph the identical n of sum it is identical, the polarization state and the angle of emergence of every beam emergent light are all different.Therefore, subgraph A1 is carried
The emergent light of information include n kind polarization state.
The emergent light for carrying the information of subgraph A1 continues to propagate along optical path, is incident on analyzer 4.If carrying subgraph
The emergent light of the information of A1 is projected directly in image planes without analyzer 4, because carrying the emergent light of the information of subgraph A1
Include the angle of emergence difference of the emergent light of n kind polarization state and every kind of polarization state, n subgraph A1 can be shown in image planes.For
Only show 1 subgraph A1 in image planes, it is necessary to make to carry in the emergent light of the information of subgraph A1 going out for only a kind of polarization state
It penetrates in light projection to image planes.By rotating analyzer 4, a kind of incident light of polarization state can be made to pass through analyzer 4, other polarizations
The incident light of state cannot pass through analyzer 4.Carry 6 energy of emergent light of only a kind of polarization state in the emergent light of the information of subgraph A1
By analyzer 4, make to show 1 subgraph A1 in image planes.
Generate the communication process and above-mentioned generation of the signal light and signal light of other subgraphs of carrying image A in the optical path
The signal light for carrying subgraph A1 is similar with the communication process of signal light in the optical path, and details are not described herein again.
By above-mentioned process, can make image A subgraph A1, A2 ..., An is with A1-A2- ..., and the sequence of-An recycles
It is shown in image planes, i.e., successively shows subgraph A1-A2- ...-An-A1-A2- ...-An- ... in image planes
Since the angle of emergence of the emergent light of different polarization states is different, can according to by image A be divided into subgraph A1,
A2 ..., the preset rules of An, determine respectively carry subgraph A1, A2 ..., in the emergent light of An by one kind of analyzer 4 partially
Polarization state, make the subgraph A1, A2 shown in image planes ..., the positional relationship of An and subgraph A1, A2 ..., the positional relationship pair of An
It answers.When carry subgraph A1, A2 ..., the emergent light of An be incident on analyzer 4 respectively when, analyzer 4 rotates to correspondingly respectively
Angle, make subgraph A1, A2 ..., a kind of corresponding emergent light of polarization state determined according to preset rules of An pass through inspection
Inclined device 4.
In order to enable human eye by the subgraph A1, A2 shown in image planes ..., An be spliced into the image A of completion, shown in image planes
The edge of the two adjacent subgraphs shown should connect, i.e., very close to each other or overlapping.Due to the outgoing of the emergent light of different polarization states
Angle is different, in order to make the edge of the adjacent subgraph shown in image planes that should connect, can choose suitable signal light and is incident on
The arrangement mode of micro-nano antenna in the incidence angle and micro-nano aerial array 3 of micro-nano aerial array 3.
By the above process, timesharing of each subgraph of image A in image planes may be implemented, subregion is shown, display
Interval meets the condition that human eye vision persists, each subgraph in the positional relationship and image A of each subgraph of image A shown in image planes
As the positional relationship divided is corresponding and the side edge of adjacent sub-images, personnel will be considered that when seeing image planes and see complete figure
As A.
Certainly, the present embodiment further includes the lens being arranged in after analyzer 4 along optical path, for that will pass through analyzer 4
Each subgraph amplifies.
The embodiment of the present invention passes through micro-nano day by optical signal generating apparatus high-frequency, each section of CYCLIC LOADING image
Linear array carries out polarization conversion to incident signal light, carries out polarization state selection by analyzer, make image each section timesharing,
Subregion is shown in image planes, and by suitable light path design, makes one to arrive complete image soon, is realized based on micro-nano structure
Projection, greatly reduces the volume of optical projection system.Further, projection is realized based on micro-nano aerial array, avoided
Traditional optical lens group bring aberration effects when being imaged；Micro-nano aerial array has insensitive to the wavelength of light
Property, it is able to achieve more broadband imaging.When aspect ratio to be projected is larger, traditional optical projection system can only be by image
For width compression to the maximum width supported, a part of image need to be only compressed to branch by the optical projection system based on micro-nano aerial array
The maximum width held, expands the display field angle of optical projection system, and the ratio of width to height of the picture of support is bigger.
Based on the above embodiment, the back side of micro-nano aerial array is coated with reflectance coating；Reflectance coating is for reflecting emergent light；Accordingly
It rises between deflection device and micro-nano aerial array on ground further include: optical splitter, for the polarized light transmission of deflection device outgoing will to be played to micro-
It receives on aerial array, and the emergent light that reflectance coating reflects is reflected on analyzer.
Optical projection system provided by the invention can also be realized by reflection mode.
It is projected to be realized by reflection mode, plates reflectance coating at the back side of micro-nano aerial array.Preferably, reflectance coating
For metallic reflective coating.
Emergent light after polarization conversion is reflected micro-nano aerial array by reflectance coating.
Correspondingly, along optical path direction, optical splitter is set between deflection device and the micro-nano aerial array of plated film rising.
It rises after incident signal light is converted to polarised light by deflection device, optical splitter is by polarized light transmission to micro-nano aerial array
On.
After incident polarised light is converted to the emergent light including a variety of polarization states by micro-nano aerial array, including a variety of polarizations
The emergent light of state is reflected on optical splitter by the reflectance coating at the micro-nano aerial array back side.
The emergent light including a variety of polarization states that optical splitter again reflects back micro-nano aerial array is reflected on analyzer.
By selecting the angle of analyzer, make from the emergent light including a variety of polarization states, each subgraph is corresponding
A kind of emergent light of polarization state is output in image planes.
The embodiment of the present invention realizes the reflective projection system based on micro-nano aerial array by optical splitter, makes optical projection system
Along the smaller of optical path direction, the volume of optical projection system is reduced.
Based on the above embodiment, the multiple that the frame number of optical signal generating apparatus load subgraph per second is 24.
The frame number of optical signal generating apparatus load subgraph should meet the condition that human eye vision persists.
The persistence of vision refers to that light after light fails, still retains showing for a period of time to vision caused by retina
As.The reason is that as caused by the reaction speed of optic nerve.It is the basis that the visual medias such as animation, film are formed and propagated.
In quick movement, after the image that human eye is seen disappears, human eye remains to continue to retain its image 0.1- object
0.4 second or so image.Generally, when the image seen when human eye is per second is up to 24 frame, human eye thinks the figure it is seen that constant
Picture.Therefore, human eye will splice each section of the image shown in image planes, each subgraph per second for showing image in image planes
As being all at least up to 24 frames, so that the frame number of display subgraph per second is the product of 24 with the sum of the subgraph of image in image planes.
The frame number per second for showing subgraph is identical as the optical signal generating apparatus load frame number of subgraph in image planes.Therefore,
Optical signal generating apparatus loads the multiple that the frame number of subgraph is 24.
The multiple that the embodiment of the present invention is 24 by the frame number of optical signal generating apparatus load subgraph per second, makes in image planes
The frame number of display subgraph per second meets the condition that human eye vision persists, and makes one to arrive complete image soon, is based on micro-nano structure
Projection is realized, the volume of optical projection system is greatly reduced.
Based on the above embodiment, according to preset rules that image is in a vertical direction or horizontal as a kind of alternative embodiment
Direction is divided into three subgraphs；Correspondingly, playing deflection device is the polarizer, for signal light to be converted to linearly polarized light.
Fig. 4 is a kind of schematic diagram of optical projection system of the embodiment of the present invention.As shown in figure 4, optical projection system is successively set along optical path
It is equipped with optical signal generating apparatus 1, the polarizer 21, micro-nano aerial array 3 and analyzer 4, is realized and is projected by transmission mode.
It is three subgraphs: left subgraph, neutron image and right son that image, which is pressed divided in horizontal direction, according to preset rules
Image.Correspondingly, every group of micro-nano array is horizontal direction on micro-nano aerial array 3.Preferably, image is averaged by horizontal direction
It is divided into three subgraphs, in this way it is easy to determine polarised light is incident on micro- in the incidence angle and micro-nano aerial array 3 of micro-nano aerial array 3
Receive the arrangement mode of antenna.
The left subgraph of 1 CYCLIC LOADING of optical signal generating apparatus, neutron image and right subgraph picture, the frame of load subgraph per second
Number no less than 72, generates the signal light for carrying the information of left subgraph, neutron image and right subgraph picture respectively.
Correspondingly, the polarizer 21 has been used as deflection device, and signal light is converted to linearly polarized light by the polarizer 21.
Linearly polarized light forms the different Left-hand circular polarization emergent light of shooting angle, dextrorotation circle after passing through micro-nano aerial array 3
Polarize emergent light and linear polarization emergent light.
When emergent light passes through analyzer 4, analyzer 4 under Mechanical course or computer control to the polarization state of emergent light into
Row screening, is only emitted Left-hand circular polarization emergent light when realizing the left subgraph of load image, emergent ray is inclined when loading neutron image
Shake emergent light, load image right subgraph as when be only emitted right-hand circular polarization emergent light.To left subgraph, neutron image and right son
Image is respectively displayed on the left side, centre and right side of image planes 7, corresponding with the positional relationship of subgraph.In suitable linearly polarized light
In incidence angle and micro-nano aerial array 3 under the design of the arrangement mode of micro-nano antenna, seen by person is in image planes 7 by Zuo Zitu
The complete image that picture, neutron image and right subgraph picture are spliced into.
Fig. 5 is a kind of schematic diagram of optical projection system of the embodiment of the present invention.As shown in figure 5, optical projection system is successively set along optical path
It is equipped with optical signal generating apparatus 1, the polarizer 21, optical splitter, micro-nano aerial array 3 and analyzer 4, is realized and is thrown by reflection mode
Shadow.
It is three subgraphs: left subgraph, neutron image and right son that image, which is pressed divided in horizontal direction, according to preset rules
Image.Correspondingly, every group of micro-nano array is horizontal direction on micro-nano aerial array 3.Preferably, image is averaged by horizontal direction
It is divided into three subgraphs, in this way it is easy to determine polarised light is incident on micro- in the incidence angle and micro-nano aerial array 3 of micro-nano aerial array 3
Receive the arrangement mode of antenna.
The left subgraph of 1 CYCLIC LOADING of optical signal generating apparatus, neutron image and right subgraph picture, the frame of load subgraph per second
Number no less than 72, generates the signal light for carrying the information of left subgraph, neutron image and right subgraph picture respectively.
Correspondingly, the polarizer 21 has been used as deflection device, and signal light is converted to linearly polarized light by the polarizer 21.
Different from the optical projection system that above-mentioned transmission mode is realized, linearly polarized light is not to be directly incident on micro-nano aerial array 3
On, but be again incident on micro-nano aerial array 3 after the transmission of optical splitter 5.
Linearly polarized light forms the different Left-hand circular polarization emergent light of shooting angle, dextrorotation circle after passing through micro-nano aerial array 3
Polarize emergent light and linear polarization emergent light, Left-hand circular polarization emergent light, right-hand circular polarization emergent light and linear polarization emergent light
The reflectance coating 33 being coated with through 3 back side of micro-nano aerial array is reflected on optical splitter 5.
Left-hand circular polarization emergent light, right-hand circular polarization emergent light and the line that optical splitter 5 reflects back reflectance coating 33 are inclined
Vibration emergent light is re-reflected on analyzer 4.
When emergent light passes through analyzer 4, analyzer 4 under Mechanical course or computer control to the polarization state of emergent light into
Row screening, is only emitted Left-hand circular polarization emergent light when realizing the left subgraph of load image, emergent ray is inclined when loading neutron image
Shake emergent light, load image right subgraph as when be only emitted right-hand circular polarization emergent light.To left subgraph, neutron image and right son
Image is respectively displayed on the left side, centre and right side of image planes 7, corresponding with the positional relationship of subgraph.In suitable linearly polarized light
In incidence angle and micro-nano aerial array 3 under the design of the arrangement mode of micro-nano antenna, seen by person is in image planes 7 by Zuo Zitu
The complete image that picture, neutron image and right subgraph picture are spliced into.
Image can also will be divided into a vertical direction to three subgraphs according to preset rules: upper subgraph, middle subgraph
Picture and lower subgraph.Correspondingly, every group of micro-nano array is vertical direction on micro-nano aerial array 3.Image is divided in a vertical direction
Three subgraphs are segmented into, realize that the process of projection presses level side with by image by the optical projection system of transmission mode or reflection mode
To three subgraphs are divided into, realize that the process of projection is similar by the optical projection system of transmission mode or reflection mode, herein not
It repeats again.
The embodiment of the present invention passes through micro-nano day by optical signal generating apparatus high-frequency, each section of CYCLIC LOADING image
Linear array carries out polarization conversion to incident signal light, carries out polarization state selection by analyzer, make image each section timesharing,
Subregion is shown in image planes, and by suitable light path design, makes one to arrive complete image soon, is realized based on micro-nano structure
Projection, greatly reduces the volume of optical projection system.Further, it when aspect ratio to be projected is larger, throws
The display field angle of shadow system expands 3 times, and the ratio of width to height of the picture of support is bigger.
Based on the above embodiment, according to preset rules that image is in a vertical direction or horizontal as a kind of alternative embodiment
Direction is divided into two subgraphs；Correspondingly, playing deflection device includes the polarizer set gradually along optical path, for turning signal light
It is changed to linearly polarized light；Quarter-wave plate, for linearly polarized light to be converted to circularly polarized light.
Fig. 6 is a kind of schematic diagram of optical projection system of the embodiment of the present invention.As shown in fig. 6, optical projection system is successively set along optical path
It is equipped with optical signal generating apparatus 1, the polarizer 21, quarter-wave plate 22, micro-nano aerial array 3 and analyzer 4, by transmission side
Formula realizes projection.
It is two subgraphs: left subgraph, right subgraph picture that image, which is pressed divided in horizontal direction, according to preset rules.Accordingly
Ground, every group of micro-nano array is horizontal direction on micro-nano aerial array 3.Preferably, image is averagely divided into two by horizontal direction
A subgraph, in this way it is easy to determine polarised light is incident on micro-nano antenna in the incidence angle and micro-nano aerial array 3 of micro-nano aerial array 3
Arrangement mode.
The frame number of the left subgraph of 1 CYCLIC LOADING of optical signal generating apparatus and right subgraph picture, load subgraph per second is no less than
48, generate the signal light for carrying the information of left subgraph and right subgraph picture respectively.
Correspondingly, the polarizer 21 and quarter-wave plate 22 have formed deflection device.Signal light is converted to by the polarizer 21
Linearly polarized light, linearly polarized light are converted to circularly polarized light by quarter-wave plate 22.
Circularly polarized light forms the same rotation direction circle of the different incident circularly polarized light of shooting angle partially after passing through micro-nano aerial array 3
Emergent light and derotation shake to circular polarization emergent light.
When emergent light passes through analyzer 4, analyzer 4 under Mechanical course or computer control to the polarization state of emergent light into
Row screening realizes that the same rotation rounding that incident circularly polarized light is only emitted when the left subgraph of load image polarizes emergent light, load image
Right subgraph as when be only emitted the opposite hand circular polarization emergent light of incident circularly polarized light.To left subgraph, neutron image and right subgraph
Left and right side as being respectively displayed on image planes 7, it is corresponding with the positional relationship of subgraph.In suitable linearly polarized light incidence angle and
On micro-nano aerial array 3 under the design of the arrangement mode of micro-nano antenna, seen by person is in image planes 7 by left subgraph and right son
Image mosaic at complete image.
Fig. 7 is a kind of schematic diagram of optical projection system of the embodiment of the present invention.As shown in fig. 7, optical projection system is successively set along optical path
It is equipped with optical signal generating apparatus 1, the polarizer 21, quarter-wave plate 22, micro-nano aerial array 3 and analyzer 4, passes through reflection side
Formula realizes projection.
It is two subgraphs: left subgraph, right subgraph picture that image, which is pressed divided in horizontal direction, according to preset rules.Accordingly
Ground, every group of micro-nano array is horizontal direction on micro-nano aerial array 3.Preferably, image is averagely divided into two by horizontal direction
A subgraph, in this way it is easy to determine polarised light is incident on micro-nano antenna in the incidence angle and micro-nano aerial array 3 of micro-nano aerial array 3
Arrangement mode.
The frame number of the left subgraph of 1 CYCLIC LOADING of optical signal generating apparatus and right subgraph picture, load subgraph per second is no less than
48, generate the signal light for carrying the information of left subgraph and right subgraph picture respectively.
Correspondingly, the polarizer 21 and quarter-wave plate 22 have formed deflection device.Signal light is converted to by the polarizer 21
Linearly polarized light, linearly polarized light are converted to circularly polarized light by quarter-wave plate 22.
Different from the optical projection system that above-mentioned transmission mode is realized, circularly polarized light is not to be directly incident on micro-nano aerial array 3
On, but be again incident on micro-nano aerial array 3 after the transmission of optical splitter 5.
Circularly polarized light forms the same rotation direction circle of the different incident circularly polarized light of shooting angle partially after passing through micro-nano aerial array 3
To circular polarization emergent light, the same rotation direction circular polarization emergent light of incident circularly polarized light and derotation go out to circular polarization for vibration emergent light and derotation
The reflectance coating 33 that light is coated with through 3 back side of micro-nano aerial array is penetrated to be reflected on optical splitter 5.
The same rotation direction circular polarization emergent light of the incident circularly polarized light that optical splitter 5 reflects back reflectance coating 33 and derotation are to circle
Polarization emergent light is re-reflected on analyzer 4.
When emergent light passes through analyzer 4, analyzer 4 under Mechanical course or computer control to the polarization state of emergent light into
Row screening realizes that the same rotation rounding that incident circularly polarized light is only emitted when the left subgraph of load image polarizes emergent light, load image
Right subgraph as when be only emitted the opposite hand circular polarization emergent light of incident circularly polarized light.To left subgraph, neutron image and right subgraph
Left and right side as being respectively displayed on image planes 7, it is corresponding with the positional relationship of subgraph.In suitable linearly polarized light incidence angle and
On micro-nano aerial array 3 under the design of the arrangement mode of micro-nano antenna, seen by person is in image planes 7 by left subgraph and right son
Image mosaic at complete image.
Image can also will be divided into a vertical direction to two subgraphs according to preset rules: upper subgraph and lower subgraph
Picture.Correspondingly, every group of micro-nano array is vertical direction on micro-nano aerial array 3.Image is divided into two sons in a vertical direction
Image realizes the process of projection and image is pressed divided in horizontal direction to be two by the optical projection system of transmission mode or reflection mode
A subgraph realizes that the process of projection is similar by the optical projection system of transmission mode or reflection mode, and details are not described herein again.
The embodiment of the present invention passes through micro-nano day by optical signal generating apparatus high-frequency, each section of CYCLIC LOADING image
Linear array carries out polarization conversion to incident signal light, carries out polarization state selection by analyzer, make image each section timesharing,
Subregion is shown in image planes, and by suitable light path design, makes one to arrive complete image soon, is realized based on micro-nano structure
Projection, greatly reduces the volume of optical projection system.Further, it when aspect ratio to be projected is larger, throws
The display field angle of shadow system expands 2 times, and the ratio of width to height of the picture of support is bigger.
Based on the above embodiment, optical projection system further include: image segmentation device connect with optical signal generating apparatus, is used for
According to preset rules by image in a vertical direction or divided in horizontal direction be multiple subgraphs.
It, can be by believing with light before optical signal generating apparatus is with each subgraph of preset order CYCLIC LOADING image
The image segmentation device of number generating device connection, according to preset rules by image in a vertical direction or divided in horizontal direction is multiple
Subgraph.Image segmentation device by image in a vertical direction or divided in horizontal direction be multiple subgraphs after, optical signal fills
Set each subgraph divided again with preset order CYCLIC LOADING.Preferably, preset rules are mean allocation.
Under some application environments, optical projection system provided by the invention can make human eye see that multiple image splices in image planes
At a secondary bigger image.For example, in the photography of the numerous more people group photo of number, shooting makimono or geographical environment,
Due to the characteristic of content of shooting, the ratio of width to height of image is larger, and traditional way is using pan-shot or several figures by shooting
As being spliced into complete image.When being projected to this kind of image, spliced image can not be inputted, but will directly be clapped
The multiple image taken the photograph is input to optical projection system with preset order circulation, and human eye also can see what multiple image was spliced into image planes
One secondary bigger image.
The embodiment of the present invention by image segmentation device according to preset rules by image in a vertical direction or horizontal direction point
Multiple subgraphs are segmented into, each section of optical signal generating apparatus high-frequency, CYCLIC LOADING image is made, pass through micro-nano aerial array pair
Incident signal light carries out polarization conversion, carries out polarization state selection by analyzer, keeps each section timesharing of image, subregion aobvious
Show in image planes, and by suitable light path design, make one to arrive complete image soon, projection is realized based on micro-nano structure,
Greatly reduce the volume of optical projection system.
Fig. 8 is a kind of flow chart of projecting method of the embodiment of the present invention.Based on the above embodiment, as shown in figure 8, a kind of figure
As display methods characterized by comprising step S1, with each subgraph of preset order CYCLIC LOADING, generate and carry every height
The signal light of the information of image；Wherein, subgraph is a part that image is split to form by preset rules, and all subgraphs can spell
It is connected in complete image；Step S2, signal light is converted into polarised light；Step S3, every beam polarised light is converted into multi beam polarization
The different emergent light of state；The beam number of emergent light is identical as the sum of the divided subgraph of image；Step S4, by each subgraph
A kind of outgoing light output of corresponding polarization state is in image planes；A kind of polarization state is determining according to preset rules.
Specifically, step S1, each subgraph of image is generated with preset order CYCLIC LOADING and carries each subgraph
Information signal light.Each subgraph is a part that image is split to form by preset rules, and all subgraph can
It is spliced into complete image.
Step S2, the signal light of the information of each subgraph of carrying generated in step S1 is converted into polarised light.Polarization
Light carries the information of each subgraph.
Step S3, the polarised light for carrying the information of each subgraph is converted into the polarised light including a variety of polarization states.It is right
It is identical as the sum of the divided subgraph of image in the beam number of the polarised light with a branch of incidence, emergent light, every beam emergent light
Polarization state and the angle of emergence are all different.
Step S4, the emergent light including a variety of polarization states of the information of subgraph each for carrying, according to preset rules
It determines a kind of emergent light of polarization state wherein corresponding with each subgraph, the emergent light of this kind of polarization state is output to image planes
On.
A kind of specific implementation process of projecting method of the embodiment of the present invention is detailed in the embodiment of above-mentioned optical projection system, herein not
It repeats again.
The embodiment of the present invention carries out optical rotation by high-frequency, each section of CYCLIC LOADING image, to incident signal light
It changes and is selected with polarization state, be shown in each section timesharing of image, subregion in image planes, and by suitable light path design, make
Human eye sees complete image, realizes projection based on micro-nano structure, greatly reduces the volume of optical projection system.Into one
Step ground realizes projection based on micro-nano structure, avoids traditional optical lens group bring aberration effects when being imaged；Micro-nano
Structure has the wavelength insensitivity to light, is able to achieve more broadband imaging.When aspect ratio to be projected is larger, pass
The optical projection system of system can only by the width compression of image to support maximum width, the optical projection system based on micro-nano structure only need by
A part of image is compressed to the maximum width of support, expands the display field angle of optical projection system, the ratio of width to height of the picture of support
It is bigger.
Based on the above embodiment, as a kind of preferred embodiment, before step S1 further include: step S0, according to default rule
Then by image in a vertical direction or divided in horizontal direction be multiple subgraphs.
Specifically, before with each subgraph of preset order CYCLIC LOADING image, according to preset rules by image by vertical
Histogram to or divided in horizontal direction be multiple subgraphs.Preferably, preset rules are mean allocation.
The embodiment of the present invention according to preset rules by image in a vertical direction or divided in horizontal direction is multiple subgraphs
Specific implementation process is detailed in the embodiment of above-mentioned optical projection system, and details are not described herein again.
The embodiment of the present invention by according to preset rules by image in a vertical direction or divided in horizontal direction be multiple subgraphs
Picture, each section of high-frequency, CYCLIC LOADING image carry out polarization conversion to incident signal light and polarization state select, make image
Each section timesharing, subregion is shown in image planes, and by suitable light path design, makes one to arrive complete image, base soon
Projection is realized in micro-nano structure, greatly reduces the volume of optical projection system.
Based on the above embodiment, as a kind of alternative embodiment, step S0 is specifically included: being pressed image according to preset rules
Vertically or horizontally it is divided into three subgraphs；Correspondingly, the polarised light in step S2 is linearly polarized light.
Specifically, in step S0, image is divided into three subgraphs in a vertical direction according to preset rules: upper subgraph
Picture, neutron image and lower subgraph；Or pressing divided in horizontal direction is three subgraphs: left subgraph, neutron image and right subgraph
Picture.
When according to preset rules by image in a vertical direction or divided in horizontal direction be three subgraphs when, correspondingly, step
It is specially that the signal light for carrying each subgraph information is converted into linearly polarized light in rapid S2.
A kind of specific implementation process of projecting method of the embodiment of the present invention is detailed in the embodiment of above-mentioned optical projection system, herein not
It repeats again.
The embodiment of the present invention carries out optical rotation by high-frequency, each section of CYCLIC LOADING image, to incident signal light
It changes and is selected with polarization state, be shown in each section timesharing of image, subregion in image planes, and by suitable light path design, make
Human eye sees complete image, realizes projection based on micro-nano structure, greatly reduces the volume of optical projection system.Into one
Step ground, when aspect ratio to be projected is larger, the display field angle of projection expands 3 times, and the ratio of width to height of the picture of support is more
Greatly.
Based on the above embodiment, as a kind of alternative embodiment, step S0 is specifically included: being pressed image according to preset rules
Vertically or horizontally it is divided into two subgraphs；Correspondingly, the polarised light in the step S2 is circularly polarized light.
Specifically, in step S0, image is divided into two subgraphs in a vertical direction according to preset rules: upper subgraph
With lower subgraph；Or pressing divided in horizontal direction is two subgraphs: left subgraph and right subgraph picture.
When according to preset rules by image in a vertical direction or divided in horizontal direction be three subgraphs when, correspondingly, step
It is specially that the signal light for carrying each subgraph information is converted into circularly polarized light in rapid S2.
A kind of specific implementation process of projecting method of the embodiment of the present invention is detailed in the embodiment of above-mentioned optical projection system, herein not
It repeats again.
The embodiment of the present invention carries out optical rotation by high-frequency, each section of CYCLIC LOADING image, to incident signal light
It changes and is selected with polarization state, be shown in each section timesharing of image, subregion in image planes, and by suitable light path design, make
Human eye sees complete image, realizes projection based on micro-nano structure, greatly reduces the volume of optical projection system.Into one
Step ground, when aspect ratio to be projected is larger, the display field angle of projection expands 2 times, and the ratio of width to height of the picture of support is more
Greatly.
Finally, the above embodiment of the present invention is only preferable embodiment, it is not intended to limit protection model of the invention
It encloses.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention
Protection scope within.
Claims (10)
1. a kind of optical projection system characterized by comprising set gradually along optical path
Optical signal generating apparatus, for generating and carrying each subgraph with each subgraph of preset order CYCLIC LOADING
The signal light of information；Wherein, the subgraph is a part that image is split to form by preset rules, and all subgraphs are sliceable
For complete described image；
Deflection device is played, for the signal light to be converted to polarised light；
Micro-nano aerial array, for polarizing the positive every Shu Suoshu for being incident on the micro-nano aerial array with preset angle
Light is converted to the different emergent light of multi beam polarization state；The beam number of the emergent light and the sum of the divided subgraph of described image
It is identical；
Analyzer, for by a kind of corresponding outgoing light output of polarization state of each subgraph in image planes；It is described
A kind of polarization state is determining according to the preset rules；
Wherein, the front of the micro-nano aerial array includes the sub- micro-nano aerial array of multiple groups；Each sub- micro-nano aerial array
It is made of the multiple micro-nano antennas arranged in a manner of preset.
2. optical projection system according to claim 1, which is characterized in that the back side of the micro-nano aerial array is coated with reflection
Film；The reflectance coating is for reflecting the emergent light；
Correspondingly, between described deflection device and the micro-nano aerial array further include:
Optical splitter, the polarized light transmission for described deflection device to be emitted is to the micro-nano aerial array, and by institute
The emergent light for stating reflectance coating reflection is reflected on the analyzer.
3. optical projection system according to claim 1 or 2, which is characterized in that the optical signal generating apparatus load institute per second
State the multiple that the frame number of subgraph is 24.
4. optical projection system according to claim 3, which is characterized in that according to the preset rules by described image by vertical
Direction or divided in horizontal direction are three subgraphs；
Correspondingly, described deflection device is the polarizer, for the signal light to be converted to linearly polarized light.
5. optical projection system according to claim 3, which is characterized in that according to the preset rules by described image by vertical
Direction or divided in horizontal direction are two subgraphs；
Correspondingly, described deflection device includes setting gradually along optical path
The polarizer, for the signal light to be converted to linearly polarized light；
Quarter-wave plate, for the linearly polarized light to be converted to circularly polarized light.
6. optical projection system according to claim 1 or 2, which is characterized in that further include:
Image segmentation device is connect with the optical signal generating apparatus, is hung down for being pressed described image according to the preset rules
Histogram to or divided in horizontal direction be multiple subgraphs.
7. a kind of projecting method using the optical projection system as described in claim 1-6 is any characterized by comprising
S1, optical signal generating apparatus generate the letter for carrying each subgraph with each subgraph of preset order CYCLIC LOADING
The signal light of breath；Wherein, the subgraph is a part that image is split to form by preset rules, and all subgraphs are sliceable to be
Complete described image；
The signal light is converted to polarised light by S2, deflection device；
Every Shu Suoshu polarised light is converted to the different emergent light of multi beam polarization state by S3, micro-nano aerial array；The emergent light
Beam number is identical as the sum of the divided subgraph of described image；
S4, analyzer are by a kind of corresponding outgoing light output of polarization state of each subgraph in image planes；Described one
Kind polarization state is determined according to the preset rules.
8. projecting method according to claim 7, which is characterized in that before the step S1 further include:
S0, according to the preset rules by described image in a vertical direction or divided in horizontal direction be multiple subgraphs.
9. projecting method according to claim 7 or 8, which is characterized in that the step S0 is specifically included:
According to the preset rules by described image in a vertical direction or divided in horizontal direction be three subgraphs；
Correspondingly, the polarised light in the step S2 is linearly polarized light.
10. projecting method according to claim 7 or 8, which is characterized in that the step S0 is specifically included:
According to the preset rules by described image in a vertical direction or divided in horizontal direction be two subgraphs；
Correspondingly, the polarised light in the step S2 is circularly polarized light.
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| KR20200017017A (en) | 2018-08-07 | 2020-02-18 | 삼성전자주식회사 | Structured light projector and electronic apparatus including the same |
| CN112015038A (en) * | 2019-05-31 | 2020-12-01 | 深圳光峰科技股份有限公司 | Light source system and projection equipment using same |
| US11714293B2 (en) * | 2019-06-27 | 2023-08-01 | Lumileds Llc | Speckle reduction in VCSEL arrays |
| CN110274693B (en) * | 2019-07-12 | 2021-10-08 | 南方科技大学 | Polarization detection device |
| CN111175990B (en) * | 2020-02-19 | 2022-07-15 | 京东方科技集团股份有限公司 | Light field display system |
| CN115190281B (en) * | 2022-06-30 | 2024-01-02 | 海宁奕斯伟集成电路设计有限公司 | Device and method for adjusting projection position of projector |
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