CN207281384U - It is a kind of that display system is worn based on three-dimensional laser line holographic projections technology - Google Patents
It is a kind of that display system is worn based on three-dimensional laser line holographic projections technology Download PDFInfo
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- CN207281384U CN207281384U CN201721270514.4U CN201721270514U CN207281384U CN 207281384 U CN207281384 U CN 207281384U CN 201721270514 U CN201721270514 U CN 201721270514U CN 207281384 U CN207281384 U CN 207281384U
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Abstract
It is a kind of that display system is worn based on three-dimensional laser line holographic projections technology, it is made of collimated light source, spatial light modulator, Amici prism, imaging system, spectroscope, free form surface semi-transparent semi-reflecting lens and aperture diaphragm.The utility model, which wears display system, has the advantages that simple in structure, image quality is high, brightness is high and without bad point, it can be achieved that the 3 D stereo of image information reproduces, and can be applied to the real of enhancing and wears in display device.
Description
Technical field
It the utility model is related to and wear display field, it is particularly a kind of aobvious based on wearing for three-dimensional laser line holographic projections technology
Show system.
Background technology
Traditional tripleplane's technology projects two dimensional image using miniscope, and is presented on the left and right of user respectively
Observed at eye for user.Due to that, there are a certain distance, will be formed between right and left eyes and observation image certain between two
Angle, and observed image is known as human eye parallax there are a certain distance.Traditional tripleplane's technology is to utilize
Human eye parallax forms image, and reflects the stereo perception that distance is produced into brain.Existing head-wearing display device, such as
Hololens and Google Glass realize three-dimensional imaging using the technology.Wearing existing for display system based on this technology
Shortcoming mainly has：
1) using miniscope as image source, display chip is generally LCOS or OLED, and brightness is low, and power consumption is big.
2) conventional three-dimensional shadow casting technique is based on point-to-point image-forming principle, and image quality is direct by display chip picture quality
Influence.
3) miniscope produce conjugate image be located at fixed focal length, need to use big depth of field optical system realize three-dimensional into
Picture.
4) there are gap, long-term observation can cause people between the convergent point of picture and the focus of conjugate image on observing for human eye
Asthenopia, influences user experience.
Contrastingly, 3D hologram shadow casting technique is using interference and diffraction principle, records simultaneously reconstructed object real three
Tie up information.Display system is worn by carrying out calculation code to 3-D view based on this technology, its phase mehtod is input to
Spatial light modulator, and acted on using the interference diffraction of input light, 3-D view is reproduced in real time.In addition, the technology base
In point-to-area image-forming principle, can avoid conventional projection technology blocks imaging, is effectively improved the efficiency of light energy utilization.It is three-dimensional complete
It is unrelated with the viewing distance of observer to cease the image display effect that shadow casting technique realizes, the visual fatigue of observer will not be caused.
The technology makes it possible three-dimension dynamical display, but so far, 3D hologram shadow casting technique fails to realize industrial applications,
Application in display system is worn also is rarely reported.First technology [1] is (referring to Qiao Wen, Huang Wenbin, Pudong woods etc..A kind of head
Wear formula augmented reality three-dimensional display apparatus, CN106501938A, 2017) propose that a kind of wear-type of achievable no visual fatigue is shown
Show enhancing 3D display scheme and display device, which is made of video generation device and transparent light field eyeglass, wherein thoroughly
Mingguang City's field lens piece is realized using the visual angle amplifying device of nanometer grating structure pools picture and the amplification of light field visual angle to image, with
Video generation device matches projects convergence ripple formation three-dimensional scene in front of human eye.The shortcoming of the technology exists
In：
1) light source used in video generation device is LCOS or OLED screen curtain, and brightness is low, and power consumption is big.
2) the nanometer grating structure difficulty of processing that transparent light field eyeglass uses is big, and processing technology is complicated, of high cost.
3) diffraction as nanometer grating, veiling glare caused by interference effect and dispersion are difficult to be rectified by optical system
Just, the image quality of head-wearing display device is reduced.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, propose a kind of based on the holographic throwing of three-dimensional laser
Shadow technology wears display system.This wear display system have it is simple in structure, image quality is high, brightness is high, excellent without bad point etc.
Point is, it can be achieved that the 3 D stereo of image information reproduces, applied to wearing in display device for augmented reality.
The technical solution of the utility model is as follows：
A kind of to wear display system based on three-dimensional laser line holographic projections technology, its feature is the system by collimated light
Source, spatial light modulator, Amici prism, imaging system, spectroscope, free form surface semi-transparent semi-reflecting lens and aperture diaphragm composition, its
Position relationship is：Using the surface of spatial light modulator as object plane, the direction of beam propagation that is exported along the spatial light modulator,
It is followed successively by Amici prism, imaging system and the spectroscope；The collimated light source is placed on Amici prism reflection direction；
The free form surface semi-transparent semi-reflecting lens are placed on dichroic mirror direction, in the semi-transparent semi-reflecting specular reflection direction of free form surface
And the aperture diaphragm is placed at a certain distance from the spectroscope left side；The aperture diaphragm and the free form surface half
Saturating semi-reflective mirror is axisymmetricly placed on optical axis, wherein the aperture diaphragm position is overlapped with pupil of human position, it is described
Spectroscopical normal is 35 °~45 ° with optical axis angulation scope.
The collimated light source is laser and the assembly of collimation lens set, and wherein laser can be semiconductor laser
Device or gas laser, collimation lens set are made of a series of lens, and it is collimated light beam to realize outgoing beam.
The spatial light modulator is based on reflection type liquid crystal micro display screen, is reflective slms, resolution ratio
For 720P or 1080P, size range is 0.22in~0.7in.
The Amici prism is crystal prism or block prism.
The imaging system is made of a series of lens groups, can be saturating for spherical lens, non-spherical lens, Fresnel
Mirror, lens material are glass or polymethyl methacrylate (PMMA).
The lens front and rear surfaces of the imaging system are coated with anti-film AR.
The spectroscope is the plane beam splitter or block prism of plating pellicle.
The semi-transparent semi-reflecting minute surface shape of the free form surface is free form surface, its face shape rise is given by the following formula：
Wherein, c1=1/r1,r1On the basis of curvature radius, r is light radial coordinate, and k is quadratic surface coefficient, aiFor
Higher order coefficient, Zi(ρ, φ) is zernike polynomial, and N is the sum of zernike polynomial, AiFor i-th zernike polynomial
Coefficient, ρ are normalized radial coordinate, and φ is normalized angle coordinate.
The material of the free form surface semi-transparent semi-reflecting lens is polymethyl methacrylate (PMMA), its front surface is coated with instead
Penetrate film.
Compared with first technology, the utility model is obtainable to be had the beneficial effect that：
(1) brightness is high, loss is small.Display system of wearing involved in the utility model is made using the collimated light beam of laser
For light source, have the characteristics that high brightness, monochromaticjty are good, collimation is high, and the electrical power of light source<1W, luminous power<0.2W.Compared with it
, using the display system of wearing of common display scheme, obtainable brightness is its more than 10 times, small with brightness height, loss for he
The advantages of.
(2) image quality is high.The utility model is worn display system and is closed using free form surface semi-transparent semi-reflecting lens and spectroscope
It is symmetrically placed in optical axis, be conducive to correct the distortion of field of view edge, and free form surface semi-transparent semi-reflecting lens will not introduce spherical aberration, can profit
Chromatic aberration correction is carried out with the lens group matching of imaging system, improves the image quality for wearing display system.
(3) it is simple in structure, processing cost is low.The optical element worn in display system of the utility model can be used and passed
The lens processing technology of system is realized, and by algorithm correct for optical aberrations, can simplify the lens group structure of imaging system portion,
To reduce the volume of head-wearing display device, make processing cost simple in structure low.
(4) without bad point.The utility model is worn display system and is appointed based on point-to-area image-forming principle, spatial light modulator
One pixel contains all phase informations of image, and therefore, which will not be subject to show core
Picture quality directly affects.This wears imaging of the display system by the real-time dynamic regulation spatial light modulator of software algorithm
Distance, makes the different piece of same two field picture have different image distance parameters, realizes the tripleplane to image.
Brief description of the drawings
The optical texture schematic diagram of wearing display system of Fig. 1 the utility model based on three-dimensional laser line holographic projections technology.
The optical texture schematic diagram of one embodiment of Fig. 2 the utility model.
The curvature of field and distortion curve of Fig. 3 the utility model embodiments.
The spherical aberration curve of Fig. 4 the utility model embodiments.
The disc of confusion of Fig. 5 the utility model embodiments.
Embodiment
The utility model is described in further detail below in conjunction with drawings and examples.It should be noted that following realities
The combination for applying the technical characteristic described in example or technical characteristic is not construed as isolated, they can be mutually combined
So as to reach superior technique effect.
It should be noted that structure depicted in this specification institute attached drawing, ratio, size etc., only coordinating explanation
The revealed content of book, so that those skilled in the art understands and reads, is not limited to the enforceable limit of utility model
Fixed condition, the modification of any structure, the change of proportionate relationship or the adjustment of size, in the work(that does not influence utility model and can be generated
Under effect and the purpose that can reach, it should all fall in the range of the revealed technology contents of utility model can be covered.
Referring to Fig. 1, Fig. 1 is the optics of wearing display system of the utility model based on three-dimensional laser line holographic projections technology
Structure principle chart.As seen from Figure 1, the utility model wears display system by collimated light based on three-dimensional laser line holographic projections technology
Source 1, spatial light modulator 2, Amici prism 3, imaging system 4, spectroscope 5, free form surface semi-transparent semi-reflecting lens 6 and aperture diaphragm 7
Composition, its position relationship are：Using the surface of spatial light modulator 2 as object plane, along the light beam of the output of spatial light modulator 2
The direction of propagation, is followed successively by Amici prism 3, imaging system 4 and the spectroscope 5；Institute is placed on 3 reflection direction of Amici prism
The collimated light source 1 stated；The free form surface semi-transparent semi-reflecting lens 6 are placed on 5 reflection direction of spectroscope, it is semi-transparent in free form surface
The aperture diaphragm 7 is placed on 6 reflection direction of semi-reflective mirror and at a certain distance from 5 left side of spectroscope；The aperture light
Door screen 7 and the free form surface semi-transparent semi-reflecting lens 6 axisymmetricly placed on optical axis, wherein 7 position of aperture diaphragm with
Pupil of human position overlaps, and normal and the optical axis angulation scope of the spectroscope 5 are 35 °~45 °；
The collimated light source 1 is laser and the assembly of collimation lens set, and wherein laser can swash for semiconductor
Light device or gas laser, collimation lens set are made of a series of lens, and it is collimated light beam to realize outgoing beam；
The spatial light modulator is based on reflection type liquid crystal micro display screen, is reflective slms, resolution ratio
For 720 pixels or 1080 pixels, size range is 0.22 inch~0.7 inch；
The Amici prism 3 is crystal prism or block prism；
The imaging system 4 is made of a series of lens groups, can be saturating for spherical lens, non-spherical lens, Fresnel
Mirror, lens material are glass or polymethyl methacrylate (PMMA)；
The lens front and rear surfaces of the imaging system 4 are coated with anti-film AR；
The spectroscope 5 is the plane beam splitter or block prism of plating pellicle；
The 6 face shape of free form surface semi-transparent semi-reflecting lens is free form surface, its face shape rise is given by the following formula：
Wherein, c1=1/r1,r1On the basis of curvature radius, r is light radial coordinate, and k is quadratic surface coefficient, aiFor
Higher order coefficient, Zi(ρ, φ) is zernike polynomial, and N is the sum of zernike polynomial, AiFor i-th zernike polynomial
Coefficient, ρ are normalized radial coordinate, and φ is normalized angle coordinate；
The material of the free form surface semi-transparent semi-reflecting lens 6 is polymethyl methacrylate (PMMA), its front surface is coated with
Reflectance coating.
The course of work of wearing display system of the utility model based on three-dimensional laser line holographic projections technology：The figure that need to be reproduced
Through as information and calculating generation phase mehtod, refresh in real time in spatial light modulator.Collimated light beam is anti-after Amici prism
2 surface of spatial light modulator is incident upon, under the control of signal source, spatial light modulator 2 mutually carries out space to the position of incident light wave
Modulation.Since spatial light modulator 2 is reflective miniature Display Technique, reflected light beam after imaging system 4 behind
Focal plane is in real image, which forms the virtual image of amplification by spectroscope 5 and free form surface semi-transparent semi-reflecting lens 6 successively, for human eye
Observation.This, which wears display system, can utilize software algorithm dynamic regulation focal length, same two field picture is had multiple image-forming ranges, lead to
Imaging system after crossing realizes that the true three-dimension of image reproduces in space.By introducing spectroscope 5 and free form surface semi-transparent half
Anti- mirror 6, is further amplified real image, improves visual field, strengthens user experience.Additionally, due to spectroscope 5 and free form surface
Semi-transparent semi-reflecting lens 6 have no effect on observation of the user to exterior real world, therefore this is worn display system and can be used for augmented reality
In device.
The structure of the utility model embodiment is as shown in Figure 1, its concrete structure and parameter are as follows：
Collimated light source 1 is the combination of semiconductor laser and collimation microscope group, and it is colored to combine realization using RGB mono-colour lasers
The a length of 587nm of light source, wherein cardiac wave.Spatial light modulator 2 is pure phase spatial light modulator, using reflective LCoS micro display
Screen, its resolution ratio are 1920 × 1080 pixels, and size is 0.35 inch.Amici prism 3 is the block prism of plating spectro-film.Into
As system 4 is made of 4 lens, lens material is Chengdu light glass material, its surface is plated for sphere and front and rear surfaces
There is anti-film.Spectroscope 5 is the plane beam splitter of plating pellicle.The face shape of free form surface semi-transparent semi-reflecting lens 6 is free form surface,
Its front surface is coated with reflectance coating, material PMMA.Using the surface of spatial light modulator 2 as object plane, imaging system 4,5 and of spectroscope
The specific structural parameters of free form surface semi-transparent semi-reflecting lens 6 are as shown in the table：
The optical design index path of the embodiment is as shown in Fig. 2, the wherein normal of spectroscope 5 and optical axis angulation model
Enclose for 40 °, embodiment is sphere using lens surface, and free form surface semi-transparent semi-reflecting lens are using Ze Nike standard rises
Face, its secondary surface coefficients k=-0.067, benchmark curvature radius r=-46mm, the coefficient A of Section 1 zernike polynomial1
=4.Free-curved-surface shape, the application of aspheric surface are ripe enough in optical system at present, can be to present design knot
Fruit further simplifies.
Fig. 3 is the curvature of field and distortion curve of the utility model embodiment.It can be seen from the figure that the focal plane shift of embodiment
Distortion in the range of the sagitta of arc and both less than 100um on meridian plane, full filed is less than 0.18.
Fig. 4 is the spherical aberration curve of the utility model embodiment.It can be seen from the figure that the spherical aberration and edge of central vision regard
Off-axis spherical aberration has been corrected caused by, and the aberration at 0.707 Entry pupil diameters has been corrected.
Fig. 5 is the disc of confusion of the utility model embodiment.It can be seen from the figure that the disc of confusion RMS value of optical system is small
In 50um.
Experiment shows that the utility model wears display system with structure letter based on three-dimensional laser line holographic projections technology
The advantages that list, image quality are high, brightness is high, without bad point is, it can be achieved that the 3 D stereo of image information reproduces, applied to augmented reality
Wear in display device.Therefore, the utility model embodiment can meet the requirement of head mounted display optical system.
A kind of specific embodiment of simply the utility model described in the utility model, only illustrating the utility model
Technical solution rather than limitation to the utility model.All those skilled in the art pass through logic point according to the design of the utility model
Analysis, reasoning or the available technical solution of limited experiment, all should be within the scope of the utility model.
Claims (9)
1. a kind of wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that by collimated light source (1), space
Optical modulator (2), Amici prism (3), imaging system (4), spectroscope (5), free form surface semi-transparent semi-reflecting lens (6) and aperture diaphragm
(7) form, position relationship is：
Using the surface of spatial light modulator (2) as object plane, the direction of beam propagation that is exported along the spatial light modulator (2),
It is followed successively by Amici prism (3), imaging system (4) and the spectroscope (5)；Light direction is reflected in the Amici prism (3)
Collimated light source (1) described in upper placement；The free form surface semi-transparent semi-reflecting lens are placed on spectroscope (5) reflection light direction
(6), put on free form surface semi-transparent semi-reflecting lens (6) reflection direction and at a certain distance from the left side of the spectroscope (5)
Put the aperture diaphragm (7)；The aperture diaphragm (7) and the free form surface semi-transparent semi-reflecting lens (6) are on optical axis
Axial symmetry is placed, and the position of the aperture diaphragm (7) is overlapped with the position of pupil of human, the normal of the spectroscope (5)
It it is 35 °~45 ° with optical axis angulation scope.
2. according to claim 1 wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that institute
The collimated light source (1) stated is laser and the assembly of collimation lens set, and the laser is semiconductor laser or gas
Laser, collimation lens set are made of a series of lens, and it is collimated light beam to realize outgoing beam.
3. according to claim 1 wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that institute
The spatial light modulator (2) stated is based on reflection type liquid crystal micro display screen, is reflective slms, and resolution ratio is 720 pictures
Element or 1080 pixels, size range are 0.22 inch~0.7 inch.
4. according to claim 1 wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that institute
The Amici prism (3) stated is crystal prism or block prism.
5. according to claim 1 wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that institute
The imaging system (4) stated is made of a series of lens groups, is spherical lens, non-spherical lens or Fresnel Lenses, lens material
For glass or polymethyl methacrylate.
6. according to claim 5 wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that institute
The lens front and rear surfaces for the imaging system (4) stated are coated with anti-film.
7. according to claim 1 wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that institute
The spectroscope (5) stated is the plane beam splitter or block prism of plating pellicle.
8. according to claim 1 wear display system based on three-dimensional laser line holographic projections technology, it is characterised in that institute
The face shape for the free form surface semi-transparent semi-reflecting lens (6) stated is free form surface, its face shape rise is given by the following formula：
Wherein, c1=1/r1, r1On the basis of curvature radius, r is light radial coordinate, and k is quadratic surface coefficient, aiFor high level
Number, Zi(ρ, φ) is zernike polynomial, and N is the sum of zernike polynomial, AiFor the coefficient of i-th zernike polynomial, ρ
For normalized radial coordinate, φ is normalized angle coordinate.
9. wearing display system based on three-dimensional laser line holographic projections technology according to claim 1 to 8 any one of them, it is special
Sign is that the material of the free form surface semi-transparent semi-reflecting lens (6) is polymethyl methacrylate, its front surface is coated with reflectance coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721270514.4U CN207281384U (en) | 2017-09-29 | 2017-09-29 | It is a kind of that display system is worn based on three-dimensional laser line holographic projections technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721270514.4U CN207281384U (en) | 2017-09-29 | 2017-09-29 | It is a kind of that display system is worn based on three-dimensional laser line holographic projections technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561710A (en) * | 2017-09-29 | 2018-01-09 | 塔普翊海（上海）智能科技有限公司 | It is a kind of that display system is worn based on three-dimensional laser line holographic projections technology |
| CN110646940A (en) * | 2019-09-29 | 2020-01-03 | 上海意扬数码科技有限公司 | Folding optical system for motorcycle helmet |
| CN111443487A (en) * | 2020-03-27 | 2020-07-24 | 北京理工大学 | Portable large-visual-angle three-dimensional near-to-eye display system and method based on complex amplitude modulation |
-
2017
- 2017-09-29 CN CN201721270514.4U patent/CN207281384U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561710A (en) * | 2017-09-29 | 2018-01-09 | 塔普翊海（上海）智能科技有限公司 | It is a kind of that display system is worn based on three-dimensional laser line holographic projections technology |
| CN110646940A (en) * | 2019-09-29 | 2020-01-03 | 上海意扬数码科技有限公司 | Folding optical system for motorcycle helmet |
| CN111443487A (en) * | 2020-03-27 | 2020-07-24 | 北京理工大学 | Portable large-visual-angle three-dimensional near-to-eye display system and method based on complex amplitude modulation |
| CN111443487B (en) * | 2020-03-27 | 2022-08-05 | 北京理工大学 | Portable large-visual-angle three-dimensional near-to-eye display system and method based on complex amplitude modulation |
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