CN105487245B - Floated integration imaging 3D based on holographic optical elements (HOE) is shown - Google Patents
Floated integration imaging 3D based on holographic optical elements (HOE) is shown Download PDFInfo
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- CN105487245B CN105487245B CN201610039570.0A CN201610039570A CN105487245B CN 105487245 B CN105487245 B CN 105487245B CN 201610039570 A CN201610039570 A CN 201610039570A CN 105487245 B CN105487245 B CN 105487245B
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- 238000003384 imaging method Methods 0.000 title claims abstract description 29
- 230000010354 integration Effects 0.000 title claims abstract description 28
- 230000003287 optical effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000009877 rendering Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 210000003644 lens cell Anatomy 0.000 claims description 17
- 238000005286 illumination Methods 0.000 claims description 12
- 230000010287 polarization Effects 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000001093 holography Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 208000003464 asthenopia Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
- G02B30/56—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels by projecting aerial or floating images
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/10—Processes or apparatus for producing holograms using modulated reference beam
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The present invention proposes that the floated integration imaging 3D based on holographic optical elements (HOE) is shown, including the holographic recording and floated integration imaging 3D of tilted microlens array holographic optical elements (HOE) show two processes.In the holographic recording process of tilted microlens array holographic optical elements (HOE), signal wave oblique incidence microlens array, is changed into tilting spherical wave, the inclination spherical wave is interfered with reference wave after microlens array is assembled, interference fringe is recorded on holographic material, holographic dry plate is obtained.During floated integration imaging 3D is shown, illuminate ripple and carry micro- pattern matrix information, and reference wave identical incidence angle during with record irradiates holographic dry plate, identical tilts spherical wave when reconstructing with record, the inclination spherical wave carries micro- pattern matrix information, the authentic integration imaging 3D rendering of reproducing, realizes that Floating integration imaging 3D is shown.
Description
Technical field
The present invention relates to suspension Display Technique and integration imaging 3D Display Techniques, more particularly to based on holographic optical elements (HOE)
Floated integration imaging 3D is shown.
Background technology
With the development of Display Technique, people to showing the requirement more and more higher of image, be no longer confined to by display screen come
Watch image.The display that suspends is a kind of fantasy technology that image is shown in the space without any medium, and it can show outstanding
Skyborne image is floated, there will be more preferable man-machine interaction characteristic.Suspension Display Technique can preferably restore the true of object
Pattern, the image of suspension is tangible, and the virtual image of display can be also merged with the real-world object in space, be enhanced
The enjoyment and feeling of immersion of beholder.If the 2D images for the display only display plane that suspends, 3D information is just lost, and display
Virtual 2D images do not have depth cueing, and the contradiction of regulation and set will be caused after being merged with real-world object, produce stereos copic viewing and regard
Fatigue.
Integration imaging is shown is a kind of true 3D Display Techniques, by the way that additional micro array is realized before display screen, is shown
The light-ray condensing that microlens array sends micro- pattern matrix during showing is reduced, and reconstructs the field information of former 3D objects.Collection
The light information for sending or reflecting into imaging 3D display energy reproducing 3D scenes, so as to construct authentic 3D rendering.It is integrated into
Show with being reproduced without auxiliary viewing equipment, authentic 3D as 3D, without visual fatigue, the correct depth cueing of offer and quasi-continuous
The advantages of watching viewpoint, is that a kind of true 3D is shown.The display that will suspend is shown with integration imaging 3D to be combined and can go back in space
Original goes out authentic 3D rendering, and solves the problems, such as stereos copic viewing visual fatigue.
The content of the invention
The present invention proposes that the floated integration imaging 3D based on holographic optical elements (HOE) is shown, including tilted microlens array is complete
The holographic recording and floated integration imaging 3D for ceasing optical element show two processes.Tilted microlens array holographic optical elements (HOE)
Holographic recording process in, signal wave oblique incidence microlens array, be changed into after microlens array is assembled tilt spherical wave,
The inclination spherical wave is interfered with reference wave, and interference fringe is recorded on holographic material, obtains holographic dry plate.Floated
During integration imaging 3D is shown, illumination ripple carries micro- pattern matrix information, and reference wave identical during with record is incident
Holographic dry plate is irradiated at angle, and identical tilts spherical wave when reconstructing with record, and the inclination spherical wave carries micro- pattern matrix information,
The authentic integration imaging 3D rendering of reproducing, realizes that Floating integration imaging 3D is shown.
The holographic recording process of the tilted microlens array holographic optical elements (HOE), as shown in Figure 1.In microlens array
Lens cells pitch isp, focal length isf.Holographic material spreading is brought into close contact with microlens array in clear glass substrate.Letter
Number ripple is a branch of directional light, oblique incidence microlens array, and incident angle isθ 1, back focal plane of the signal wave in each lens cells
Upper formation convergent point, and constitute convergence lattice array, offset of each convergent point relative to its correspondence lens cells optical axisdBy formula
（1）Obtain,
d=f tanθ 1 (1)
The spacing of adjacent convergent point is equal to lens cells pitchp.Signal wave is converted into convergence lattice array by microlens array
Outwards diverging afterwards, is changed into tilting spherical wave, the angle of inclination of the inclination spherical waveθ 2With the incident angle of signal waveθ 1It is equal.Ginseng
It is also a branch of directional light to examine ripple, has identical wavelength and polarization state with signal wave, reference wave is with signal wave respectively from lenticule
The both sides of array are incident.Reference wave is with incidence angleθ 3Microlens array is irradiated, and is interfered with tilting spherical wave, in holographic material
Interference fringe is recorded on material, the holographic recording of tilted microlens array holographic optical elements (HOE) is completed.By development, fixing processing
Holographic dry plate afterwards has recorded convergence characteristics of the microlens array to the directional light of oblique incidence.
Floated integration imaging 3D shows process, as shown in Figure 2.Illumination ripple is a branch of directional light, is joined when it is with record
Examine ripple identical with the wavelength and polarization state of signal wave.Information of the ripple comprising micro- pattern matrix and oblique illumination holographic dry plate are illuminated,
Incidence angle with record when reference wave incidence angle it is identical, all forθ 3.Reference wave when illumination ripple during reproduction is with record meets cloth
Glug matching condition.Image primitive pitch is identical with lens cells pitch in microlens array in micro- pattern matrix, and the throwing of image primitive
The posting field of shadow zone domain and lens cells coincides.Inclination spherical wave during the light reproducing record of hologram diffraction, the inclination
Spherical wave forms convergence lattice array again, and the convergence lattice array that microlens array is produced during with record is identical.Holographic dry plate
Lie low placement, and carry micro- pattern matrix information tilts the authentic 3D rendering of spherical wave reproducing, and the 3D rendering is suspended in holography
On dry plate, its view direction is watched to tilt, viewing angleθ 4The incident angle of signal wave during with holographic recordingθ 1It is equal, realize
Floating integration imaging 3D display effects.
Brief description of the drawings
Accompanying drawing 1 is the holographic recording schematic diagram of tilted microlens array holographic optical elements (HOE)
Accompanying drawing 2 is floated integration imaging 3D display schematic diagrams
Shown by reference numeral in above-mentioned accompanying drawing is：
1 microlens array, 2 holographic materials, 3 signal waves, 4 reference waves, 5 assemble lattice array, and 6 tilt spherical wave, and 7 is complete
Cease dry plate, 8 illumination ripples, 9 3D renderings, 10 beholders.
It should be appreciated that above-mentioned accompanying drawing is schematical, it is not drawn to draw.
Embodiment
The typical case shown the following detailed description of the floated integration imaging 3D based on holographic optical elements (HOE) of the present invention
Embodiment, the present invention is further described specifically.It is necessarily pointed out that, following examples are served only for the present invention
It is described further, it is impossible to be interpreted as limiting the scope of the invention, art skilled person is according to above-mentioned
The content of the invention makes some nonessential modifications and adaptations to the present invention, still falls within protection scope of the present invention.
The present invention proposes that the floated integration imaging 3D based on holographic optical elements (HOE) is shown, including tilted microlens array is complete
The holographic recording and floated integration imaging 3D for ceasing optical element show two processes.
The holographic recording process of the tilted microlens array holographic optical elements (HOE), as shown in Figure 1.In microlens array
Lens cells pitch isp=1mm, focal length isf=3.3mm.Holographic material spreading is and tight with microlens array in clear glass substrate
It is closely connected to close.Signal wave is a branch of directional light, oblique incidence microlens array, and incident angle isθ 1=45 °, signal wave is each
Convergent point is formed on the back focal plane of mirror member, and constitutes convergence lattice array, each convergent point is relative to its correspondence lens cells optical axis
OffsetdBy formula（1）Calculate,d=3.3mm, the spacing of adjacent convergent point is equal to lens cells pitch 1mm.Signal wave passes through
Microlens array outwards dissipates after being converted into convergence lattice array, is changed into tilting spherical wave, the angle of inclination of the inclination spherical waveθ 2
With the incident angle of signal waveθ 1It is equal, all it is 45 °.Reference wave is also a branch of directional light, has identical wavelength with signal wave
And polarization state, wavelength is 731nm, and polarization state is vertical polarization, and reference wave enters from the both sides of microlens array respectively with signal wave
Penetrate.Reference wave is with incidence angleθ 3=60 ° of irradiation microlens arrays, and interfered with tilting spherical wave, recorded on holographic material
Lower interference fringe, completes the holographic recording of tilted microlens array holographic optical elements (HOE).Holography after development, fixing processing
Photographic plate recording has descended microlens array to the convergence characteristics of the directional light of oblique incidence.
Floated integration imaging 3D shows process, as shown in Figure 2.Illumination ripple is a branch of directional light, is joined when it is with record
Examine ripple identical with the wavelength and polarization state of signal wave, wavelength is 731nm, and polarization state is vertical polarization.Illuminate ripple and include micro- image
The information of array and oblique illumination holographic dry plate, the incidence angle of reference wave is identical when incidence angle is with recording, all forθ 3=60°.Reproduce
When illumination ripple with record when reference wave meet Bragg matching condition.Image primitive pitch and lenticule battle array in micro- pattern matrix
Lens cells pitch is identical in row, is all 1mm, and the view field of image primitive and the posting field of lens cells coincide.Holography is spread out
Inclination spherical wave during the light reproducing record penetrated, the inclination spherical wave forms convergence lattice array again, micro- during with record
The convergence lattice array that lens array is produced is identical.Holographic dry plate lies low placement, carries the inclination sphere of micro- pattern matrix information
The authentic 3D rendering of ripple reproducing, the 3D rendering is suspended on holographic dry plate, and its view direction is watched to tilt, viewing angleθ 4
The incident angle of signal wave during with holographic recordingθ 1It is equal, be all 45 °, beholder viewing when, feel the 3D rendering departing from
Holographic dry plate, suspends in space, realizes Floating integration imaging 3D display effects.
Claims (1)
1. the floated integration imaging 3D display methods based on holographic optical elements (HOE), it is characterised in that including tilted microlens battle array
The holographic recording of row holographic optical elements (HOE) and floated integration imaging 3D show two processes, in tilted microlens array holographic optical
In the holographic recording process for learning element, lens cells pitch is in microlens arrayp, focal length isf, holographic material spreading is in transparent glass
In glass substrate, and it is brought into close contact with microlens array, signal wave is a branch of directional light, oblique incidence microlens array, incidence angle
Spend and beθ 1, signal wave forms convergent point on the back focal plane of each lens cells, and constitutes convergence lattice array, and each convergent point is relative
In the offset of its correspondence lens cells optical axisdBy formulad = f tanθ 1Obtain, the spacing of adjacent convergent point is equal to lens cells section
Away fromp, signal wave by microlens array be converted into convergence lattice array after outwards dissipate, be changed into tilt spherical wave, the inclination sphere
The angle of inclination of ripple and horizontal directionθ 2With the incident angle of signal waveθ 1Equal, reference wave is also a branch of directional light, with signal wave
With identical wavelength and polarization state, both sides of the reference wave with signal wave respectively from microlens array are incident, and reference wave is with incidence
Angleθ 3Microlens array is irradiated, and is interfered with tilting spherical wave, interference fringe is recorded on holographic material, completes to tilt
The holographic recording of microlens array holographic optical elements (HOE), the holographic dry plate after development, fixing processing has recorded lenticule
Convergence characteristics of the array to the directional light of oblique incidence；During floated integration imaging 3D is shown, illumination ripple is a branch of flat
Row light, the wavelength and polarization state of reference wave and signal wave are identical when it is with record, and information of the illumination ripple comprising micro- pattern matrix is simultaneously
Oblique illumination holographic dry plate, incidence angle with record when reference wave incidence angle it is identical, all forθ 3, illumination ripple and record during reproduction
When reference wave meet image primitive pitch and lens cells pitch phase in microlens array in Bragg matching condition, micro- pattern matrix
Together, and the view field of image primitive and the posting field of lens cells coincide, inclining during the light reproducing record of hologram diffraction
Oblique spherical wave, the inclination spherical wave forms convergence lattice array again, and the convergence lattice array that microlens array is produced during with record is complete
Exactly the same, holographic dry plate lies low placement, and carry micro- pattern matrix information tilts the authentic 3D rendering of spherical wave reproducing, the 3D
Image is suspended on holographic dry plate, and its view direction is watched to tilt, and the horizontal sextant angle of beholder's sight and holographic dry plate is constituted
Viewing angleθ 4The incident angle of signal wave during with holographic recordingθ 1It is equal, realize Floating integration imaging 3D displays effect
Really.
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| CN107765438B (en) * | 2016-08-18 | 2020-09-15 | 群睿股份有限公司 | Image display device and image display method |
| CN107203050B (en) * | 2016-11-28 | 2019-07-30 | 四川大学 | Double vision integration imaging 3D display method based on holographic optical elements (HOE) |
| CN107608086B (en) * | 2017-09-15 | 2019-06-28 | 四川大学 | A kind of floated integration imaging 3D display device |
| FR3075095B1 (en) * | 2017-12-14 | 2020-02-28 | Oberthur Fiduciaire Sas | ASSEMBLY OF A COMPLEX TRANSPARENCY DEVICE AND AT LEAST ONE MICRO-IMAGE NETWORK, AS WELL AS A SECURITY DOCUMENT COMPRISING SAME |
| CN109100874B (en) * | 2018-05-29 | 2023-11-14 | 上海交通大学 | Near-to-eye true three-dimensional display system based on holographic optical element and method thereof |
| CN111880390B (en) * | 2020-03-04 | 2021-06-04 | 北京航空航天大学 | Color holographic 3D display system based on white light illumination |
| CN111524126B (en) * | 2020-04-29 | 2023-03-31 | 四川大学 | Automatic feature and morphology recognition method |
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