CN207396866U - Holographic near-eye display system - Google Patents
Holographic near-eye display system Download PDFInfo
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- CN207396866U CN207396866U CN201720943946.0U CN201720943946U CN207396866U CN 207396866 U CN207396866 U CN 207396866U CN 201720943946 U CN201720943946 U CN 201720943946U CN 207396866 U CN207396866 U CN 207396866U
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- volume holographic
- display system
- eye display
- phase
- spatial light
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Abstract
The holographic near-eye display system of the utility model, including：Glasses sandwich type element, for being worn on human body head, including eyeglass；Arranged on the optical imaging system of the shell, including：Laser emitter, phase spatial light modulator and the volume holographic surface on the inside of eyeglass；The volume holographic surface is formed by being arranged at the volume holographic grating on the inside of the eyeglass；Wherein, phase spatial light modulator and volume holographic surface are set gradually, and form the light path transmitted for the reference light of the laser transmitter projects；Wherein, the phase spatial light modulator modulates received light wave and outgoing, the volume holographic surface by the modulated Diffraction of light wave received to human eye, to form the picture of content to be displayed；The utility model realizes the near-eye display system using volume holographic face, and compact-sized, small, visual field is big.
Description
Technical field
The utility model is related to optical system and device design field, more particularly to holographic near-eye display system.
Background technology
Near-eye display device at present, such as 3D glasses etc. are substantially using eyes observation parallax figure, generate three-dimensional sense
Feel；It is this to belong to pseudo- 3D technology；Although have some near-eye display devices at present to occur, for example, VR glasses, most of equal body
Product is larger, and user experience is bad.
The content of the invention
In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide holographic near-eye display system,
For solving the problems of the prior art.
In order to achieve the above objects and other related objects, the utility model provides a kind of holographic near-eye display system, including：
Glasses sandwich type element, for being worn on human body head, including eyeglass；Arranged on the optical imaging system of the glasses sandwich type element, including：
Laser emitter, phase spatial light modulator and the volume holographic surface on the inside of eyeglass；The volume holographic surface is by setting
What the volume holographic grating on the inside of the eyeglass was formed；Wherein, phase spatial light modulator and volume holographic surface are set successively
It puts, forms the light path transmitted for the reference light of the laser transmitter projects；Wherein, the phase spatial light modulator modulation institute
The light wave of reception and outgoing, the volume holographic surface by the modulated Diffraction of light wave received to human eye, it is to be shown to be formed
The picture of content.
In an embodiment of the utility model, the holography near-eye display system, including：Image processor；Control mould
Block is electrically connected described image processor and phase space location modulation device.
In an embodiment of the utility model, the holographic near-eye display system, including：Positioned at the spectacle shell
External component beyond body；The phase space location modulation device is connected with phase space location modulation driver, the control module connection
The phase space location modulation driver；The control module is electrically connected with power supply module；Wherein, the control module, image
One or more of processor, phase space location modulation driver and power supply module are arranged in the external component.
In an embodiment of the utility model, the diffraction on the volume holographic surface meets following rule：Diffraction light is
Along assigned direction diffraction time is specified to be emitted.
In an embodiment of the utility model, the phase spatial light modulator is to the incident angle of the reference light
Vertical incidence tilts 0 °~60 ° directions settings along relative normal.
In an embodiment of the utility model, the type of the phase spatial light modulator includes：Liquid crystal on silicon, number
Micro reflector array or liquid crystal display.
In an embodiment of the utility model, the laser emitter, phase spatial light modulator and volume holographic surface
In at least two between be equipped with one or more speculums, with make the light path in bending or fold shape.
As described above, the holographic near-eye display system of the utility model, including：Glasses sandwich type element, for being worn on human body head
Portion, including eyeglass；Arranged on the optical imaging system of the glasses sandwich type element, including：Laser emitter, phase space light modulation
Device and the volume holographic surface on the inside of eyeglass；The volume holographic surface is the volume holographic light by being arranged on the inside of the eyeglass
What grid were formed；Wherein, phase spatial light modulator and volume holographic surface are set gradually, and are formed and are sent out for the laser emitter
The light path for the reference light transmission penetrated；Wherein, the phase spatial light modulator modulates received light wave and outgoing, the body are complete
Surface is ceased by the modulated Diffraction of light wave received to human eye, to form the picture of content to be displayed；The utility model realizes profit
Compact-sized with the near-eye display system in volume holographic face, small, visual field is big.
Description of the drawings
Fig. 1 is shown as the structure diagram of holographic near-eye display system of the utility model in an embodiment.
Fig. 2 is shown as the structural representation of optical system in holographic near-eye display system of the utility model in an embodiment
Figure.
Fig. 3 is shown as circuit module schematic diagram in holographic near-eye display system of the utility model in an embodiment.
Fig. 4 a~4d be shown as the utility model in an embodiment phase graph code shown using the structure of complementary masking
It is intended to.
Fig. 5 a~5c are shown as the wave vector schematic diagram of the utility model volume holographic surface applications in multiple embodiments.
Fig. 6 a~6b be shown as the utility model in multiple embodiments volume holographic surface to content to be displayed (object) arrive into
The light path schematic diagram of picture.
Fig. 7 a are shown as the schematic diagram of the utility model first phase figure in an embodiment.
Fig. 7 b are shown as the schematic diagram of the corresponding second phase figures of Fig. 7 a.
Fig. 7 c are shown as the corresponding holographic imaging schematic diagrames of Fig. 7 a.
Component label instructions
101 glasses sandwich type elements
102 external components
201 laser emitters
202 phase spatial light modulators
203 volume holographic surfaces
204 first speculums
205 second speculums
301 control modules
302 image processors
303 power supply modules
304 audio units
305 phase space location modulation drivers
Specific embodiment
Illustrate the embodiment of the utility model below by way of specific specific example, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition
Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints with answering
With carrying out various modifications or alterations under the spirit without departing from the utility model.It should be noted that in situation about not conflicting
Under, the feature in following embodiment and embodiment can be mutually combined.
It should be noted that the diagram provided in following embodiment only illustrates the basic of the utility model in a schematic way
Conception, then only the display component related with the utility model rather than component count, shape during according to actual implementation in schema
And size is drawn, kenel, quantity and the ratio of each component can be a kind of random change during actual implementation, and its assembly layout
Kenel may also be increasingly complex.
The utility model is on the nearly eye display technology field of 3D hologram, suitable for virtual reality (VR) or is enhanced existing
Real (AR) field.
As shown in Figure 1, the application schematic diagram of the holographic near-eye display system in displaying one embodiment of the utility model, it can
Including a spectacle housing 101, human body head is worn on, and the glasses sandwich type element 101 has transparent or opaque eyeglass,
The eyeglass is included in the optical imaging system in glasses sandwich type element 101, by the optical imaging system of near-eye display device into
The imaging of row content to be displayed, and human eye is supplied to watch.
Referring to Fig. 2, show the optical imaging system of the holographic near-eye display system in one embodiment of the utility model
Imaging schematic diagram.
The optical imaging system includes：Laser emitter 201, phase spatial light modulator 202 and on the inside of the eyeglass
Volume holographic surface 203.
Wherein, phase spatial light modulator 202 and volume holographic surface 203 are set gradually, and are formed and are supplied the laser emitter
The light path of the light wave transmission of 201 transmittings；Wherein, the phase spatial light modulator 202 modulates received light wave and outgoing,
The volume holographic surface 203 by the modulated Diffraction of light wave received to human eye, to form the picture of content to be displayed.
Optionally, in the laser emitter 201, phase spatial light modulator 202 and volume holographic surface 203 at least
One or more speculums, that is, the first speculum 204 and the second speculum 205 in illustrating, to make the light are equipped between two
Road is in bending or the shape folded, so that whole system is compact-sized, reduces system bulk.
In an embodiment of the utility model, the type of the phase spatial light modulator 202 includes：Liquid crystal on silicon
(LCOS), the micro- mirror lens array (DMD) of number or liquid crystal display (LCD).
As shown in figure 3, the control circuit part of the displaying holographic near-eye display system, including：Control module 301,
Image processor 302 and power supply module 303；Optionally, it may also include audio unit 304.
The control module 301 is electrically connected image processor 302 and phase space location modulation device.Specifically, the phase
Spatial modulator is connected with phase space location modulation driver 305, and the control module 301 connects the phase space location modulation driving
Device 305, to control phase space location modulation device by phase space location modulation driver 305；The control module 301 can be used for
The whole control of three- dimensional panoramic show system.In an embodiment of the utility model, the control module 301 can pass through place
The realizations such as device (MCU, CPU, SOC, CPLD or FPGA etc.), memory (RAM or ROM) are managed, instruction, institute are stored in memory
Processor is stated to execute instruction to realize corresponding function.
The power supply module 303 is electrically connected the control module 301, to be powered.One in the utility model is real
It applies in example, the power supply module 303 can be battery, be preferably the lithium battery of low-power consumption.
The audio unit 304 is electrically connected the control module 301, for carrying out audio collection, transmission or broadcasting
Deng；For example, the audio unit 304 can be used for transmission and the matched audio of displayed content, and play out.
Described image processor 302, for accelerating calculating process, in an embodiment of the utility model, at the image
Reason device 302 can be used in procedure below：
A the complex amplitude that the phase spatial light modulator position) is calculated according to the dummy model generates the first phase
Bitmap；
B) according to system aberration come integrated calibration first phase figure and calculate superposition with reference to the interference of light and obtain second
Phase diagram.
Second phase figure is sent to the phase spatial light modulator by the control module 301.
Specifically, the content to be displayed be dummy model, can be third party's modeling software (such as 3DMAX,
SolidWorks etc.) it establishes, can be 3D models or 2D figures.
Holographic principle can be described as record and the reproduction of wavefront by its physical significance again, with a reference light and object diffraction
Light wave (be known as Object light wave) interference, can be with the amplitude and phase information of completely recorded Object light wave, and by such one interference
Figure carries out diffraction with reference light, can reappear the picture of original object.
Since the utility model using digitized mode simulates the recording process, and second phase figure is obtained, it is described
Phase spatial light modulator is defeated after the reference light from laser emitter and the second phasor are interfered and (modulated)
Go out, the reference light can be spherical wave or plane wave；The light wave exported after interference is diffracted into hologram by volume holographic face
Picture.
Phase diagram coding mode includes used by the first phase figure generation：Dibit phase coding mode or error diffusion
Coding mode.
For example, if the phase spatial light modulator is pure phase bit-type, the coding mode uses double phase codings
Mode, including：Assuming that certain point complex amplitude is on phase spatial light modulator：C=aeip, the complex amplitude after coding is：c2；Its
In, a is expressed as the amplitude of the point；P represents the phase of the point；
Calculate following parameter：
pa=p-cos-1a；
pb=p+cos-1a；
Further according to pure phase code formula：c2=ca×Mask1+cb×Mask2, c can be acquired2；
Wherein, Mask1, Mask2For the expression variable of two complementary masks of covering phase spatial light modulator, value
For 0 or 1, the pattern of described two masks is the lineament of periodic distribution, wherein, schematic diagram such as Fig. 4 a of the first mask
Shown, Fig. 4 b are the close-up schematic views of the part A of the first mask in Fig. 4 a；In addition the schematic diagram of the second mask such as Fig. 4 c
It is shown, Fig. 4 d be the close-up schematic view of the part B of the second mask in Fig. 4 c as shown in figure 4d, from Fig. 4 b and 4d relatively it was found from
The complimentary fashion of two masks.
Specifically, reference light irradiation spatial light modulator (SLM) could be provided as hanging down to the incident angle of the reference light
It is straight incident, 0 °~60 ° directions can also be tilted along relative normal and set, depending on system structure.
In an embodiment of the utility model, each several part of the light path process of the optical imaging system is it is possible that production
Raw aberration, such as aberration of diffraction element, human eye etc. on eyeglass；Those aberrations are referred to as system aberration in the application, it is described
Integrated calibration not only includes the correction to holographic reconstructed image in itself, further includes the compensation of the aberration to being generated in subsequent optical path, example
Such as the compensation of diffraction element on eyeglass, the aberration of human eye；Preferably, the first phase figure is carried out on zernike polynomial
In the correction and compensation of at least the 3rd to the 7th, which can refer to the following table 1 and understands.
Table 1：
focus
vertical astigmatism
oblique asngmatism
horizontal coma
vertical coma
Described image processor 302 can be realized by picture processing chip (GPU) circuit.
Referring again to embodiment illustrated in fig. 1, the holography near-eye display system may also include：Positioned at the glasses sandwich type element
External component 102 beyond 101；Wherein, the control module 301, image processor 302, phase space location modulation driver
One or more of 305 and power supply module 303 are arranged in the external component 102, so as to reduce glasses sandwich type element 101
Volume.
In an embodiment of the utility model, volume holographic grating is machined with to form the volume holographic table on the inside of the eyeglass
Face, the diffraction on the volume holographic surface meet following rule：If eyeglass possesses wave vector Kg, incident light Kp, diffraction light is
Kd, Kd specify diffraction time to be emitted along assigned direction, eventually arrive at human eye, 60 ° of emergent ray visual field.Due to without using lens,
Equipment volume can significantly be reduced.
Specifically, the vector and working condition wave vector of the volume holographic concave grating are as shown in Fig. 5 a to 5c.Fig. 5 a exhibitions
Show the work polar plot of volume holographic grating, if incident light has certain angle error meeting for Kp and volume holographic grating vector component Ks
Certain Prague error is generated, i.e., as shown in Figure 5 b.
As shown in Figure 5 c, since the volume holographic grating vector component Ks of different wave length is different；It is shown for colour, when passing through
The incident light vector for dividing multiplexing different, can reach color display effect.
The volume holographic surface, which can treat as transmissive element, can also treat as reflecting element, as shown in Fig. 6 a and 6b, Fig. 6 a
Displaying seems to export diffraction light Kd after being reflected by volume holographic surface (VHS) incident light Kp to be formed；Fig. 6 b displayings are as by body
Hologram sheet exports diffraction light Kd to be formed after incident light Kp refractions.
As shown in Fig. 7 a to Fig. 7 c, show in an embodiment from the mistake of first phase figure, second phase figure to holographic imaging
Journey.Wherein, Fig. 7 a are shown as the schematic diagram of the utility model first phase figure in an embodiment；Fig. 7 b are shown as Fig. 7 a correspondences
Second phase figure schematic diagram；Fig. 7 c are shown as the corresponding holographic imaging schematic diagrames of Fig. 7 a.
Specifically, the encryption algorithm and described of the hologram generation of the above-mentioned image processor of the application
The algorithm of aberration correction is only for example, and not this Applicant's Abstract graph protection object；Claimed the application is that the nearly eye of entire complete set is shown
Show the optical imaging system of system structure and circuit module between connection structure, and the application is by using volume holographic face
The problems such as technical solution being imaged is not compact enough to solve existing near-eye display system structure, and volume is not small enough.
In conclusion the holographic near-eye display system of the utility model, including：Glasses sandwich type element, for being worn on human body head
Portion, including eyeglass；Arranged on the optical imaging system of the glasses sandwich type element, including：Laser emitter, phase space light modulation
Device and the volume holographic surface on the inside of eyeglass；The volume holographic surface is the volume holographic light by being arranged on the inside of the eyeglass
What grid were formed；Wherein, phase spatial light modulator and volume holographic surface are set gradually, and are formed and are sent out for the laser emitter
The light path for the reference light transmission penetrated；Wherein, the phase spatial light modulator modulates received light wave and outgoing, the body are complete
Surface is ceased by the modulated Diffraction of light wave received to human eye, to form the picture of content to be displayed；The utility model realizes profit
Compact-sized with the near-eye display system in volume holographic face, small, visual field is big.
The utility model effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above embodiments are only illustrative of the principle and efficacy of the utility model, new not for this practicality is limited
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by the claim of the utility model.
Claims (7)
1. a kind of holography near-eye display system, which is characterized in that including：
Glasses sandwich type element, for being worn on human body head, including eyeglass；
Arranged on the optical imaging system of the glasses sandwich type element, including：It laser emitter, phase spatial light modulator and is arranged on
Volume holographic surface on the inside of eyeglass；The volume holographic surface is formed by being arranged at the volume holographic grating on the inside of the eyeglass
's；Wherein, phase spatial light modulator and volume holographic surface are set gradually, and form the reference for the laser transmitter projects
The light path of light transmission；
Wherein, the phase spatial light modulator modulates received light wave and outgoing, and the volume holographic surface will receive
Modulated Diffraction of light wave is to human eye, to form the picture of content to be displayed.
2. holography near-eye display system according to claim 1, which is characterized in that including：
Image processor；
Control module is electrically connected described image processor and phase space location modulation device.
3. holography near-eye display system according to claim 2, which is characterized in that including：Positioned at the glasses sandwich type element
External component in addition；The phase space location modulation device is connected with phase space location modulation driver, and the control module connects institute
State phase space location modulation driver；The control module is electrically connected with power supply module；Wherein, the control module, at image
One or more of reason device, phase space location modulation driver and power supply module are arranged in the external component.
4. holography near-eye display system according to claim 1, which is characterized in that the diffraction symbol on the volume holographic surface
Close following rule：Diffraction light is along assigned direction diffraction time to be specified to be emitted.
5. holography near-eye display system according to claim 1, which is characterized in that the phase spatial light modulator is to institute
It states the incident angle of reference light and tilts 0 °~60 ° directions settings for vertical incidence or along relative normal.
6. holography near-eye display system according to claim 1, which is characterized in that the class of the phase spatial light modulator
Type includes：Liquid crystal on silicon, digital micromirror array or liquid crystal display.
7. holography near-eye display system according to claim 1, which is characterized in that the laser emitter, phase space
In optical modulator and volume holographic surface at least two between be equipped with one or more speculums, with make the light path in bending or
The shape of folding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720943946.0U CN207396866U (en) | 2017-07-31 | 2017-07-31 | Holographic near-eye display system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720943946.0U CN207396866U (en) | 2017-07-31 | 2017-07-31 | Holographic near-eye display system |
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| CN207396866U true CN207396866U (en) | 2018-05-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107479197A (en) * | 2017-07-31 | 2017-12-15 | 上海永微信息科技有限公司 | Holographic near-eye display system |
| CN111158152A (en) * | 2020-02-17 | 2020-05-15 | Oppo广东移动通信有限公司 | Head-mounted display device and DLP projection system |
| CN113287055A (en) * | 2019-09-30 | 2021-08-20 | 株式会社Lg化学 | Head-mounted display |
-
2017
- 2017-07-31 CN CN201720943946.0U patent/CN207396866U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107479197A (en) * | 2017-07-31 | 2017-12-15 | 上海永微信息科技有限公司 | Holographic near-eye display system |
| CN107479197B (en) * | 2017-07-31 | 2023-07-04 | 上海永微信息科技有限公司 | Holographic near-eye display system |
| CN113287055A (en) * | 2019-09-30 | 2021-08-20 | 株式会社Lg化学 | Head-mounted display |
| CN111158152A (en) * | 2020-02-17 | 2020-05-15 | Oppo广东移动通信有限公司 | Head-mounted display device and DLP projection system |
| WO2021164453A1 (en) * | 2020-02-17 | 2021-08-26 | Oppo广东移动通信有限公司 | Head-mounted display device and dlp projection system |
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