CN109239835A - Waveguide, imaging expanded mode group, light source module group, near-eye display system and equipment - Google Patents
Waveguide, imaging expanded mode group, light source module group, near-eye display system and equipment Download PDFInfo
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- CN109239835A CN109239835A CN201811222780.9A CN201811222780A CN109239835A CN 109239835 A CN109239835 A CN 109239835A CN 201811222780 A CN201811222780 A CN 201811222780A CN 109239835 A CN109239835 A CN 109239835A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
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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
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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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
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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Abstract
The embodiment of the present application discloses waveguide, imaging expanded mode group, light source module group, near-eye display system and equipment.Light source module group generates the laser beam comprising image information, and laser beam is exported to imaging expanded mode group, the waveguide that expanded mode group includes vertical direction and horizontal direction is imaged, to carry out the extension on both vertically and horizontally to the laser beam exported by light source module group.Extension by imaging expanded mode group to light beam, can more efficiently increase the range of light beam emergent pupil, and the light beam for solving outgoing leads to the lesser defect of areas imaging because of field angle deficiency.
Description
Technical field
This application involves laser scanning display technical fields, and in particular to waveguide, imaging expanded mode group, light source module group, close
Eye display system and equipment.
Background technique
Nowadays, with augmented reality (Augmented Reality, AR), virtual reality (Virtual Reality,
The nearly eye of the fast development of display technologies such as VR), such as head-mounted display (Head-Mounted Display, HMD) etc. is shown
Equipment also becomes the hot spot of display industry.
Existing near-eye display device generally passes through optical lens and converges to the light of virtual image in the pupil of user,
Field angle when due to beam projecting is limited, so having stringenter limitation to the position of human eye (especially pupil).
However, pupil position is likely to occur variation during user actually uses near-eye display device, and such as: it uses
The Rotation of eyeball at family, alternatively, the different user of two interpupillary distances successively uses the same near-eye display device, in aforementioned situation
Under, relative to the position of emergent ray a degree of variation will occur for the pupil position of user, or even exceed field angle pair
The range answered, then, the light that can further result in outgoing can not fully enter human eye, the image for causing user to watch
It is ineffective or even image can not be watched.
Summary of the invention
The application's is designed to provide a kind of waveguide, imaging expanded mode group, light source module group, near-eye display system and sets
It is standby, for solving the problems, such as the equipment field angle in nearly eye is shown.
The embodiment of the present application provides a kind of waveguide, comprising: in the waveguide along the transmission path of light beam, at least one position
The index distribution set meets the index distribution of condenser lens, to be focused to the light beam transmitted in the waveguide, wherein
Focal position is located in the waveguide.
Further, when the index distribution for having plurality of positions in the transmission path meets the refractive index point of condenser lens
When cloth, the spacing of the corresponding emergent pupil in arbitrary neighborhood position is not more than the average minimum diameter of pupil of human.
Further, the index distribution of the plurality of positions is identical.
Further, the focal position of light beam is equipped with anti-saturating face, the propagation in the anti-face and light beam thoroughly in the waveguide
Path is in predetermined angle.
The embodiment of the present application also provides a kind of imaging expanded mode group, partly or entirely uses waveguide above-mentioned, the imaging
Expanded mode group includes: vertical extension waveguide and horizontal extension waveguide, wherein
The the first anti-saturating face for being equipped with multiple inclinations in the vertical extension waveguide along longitudinally and being parallel to each other；
The beam path being parallel to each other in the horizontal extension waveguide equipped with multichannel, the incidence end of each beam path
It is opposite with each described first anti-emitting light path in face thoroughly respectively, be equipped in each beam path at least one second it is anti-thoroughly
Face.
Further, each described first anti-face thoroughly in the vertical extension waveguide is placed equidistant with, and any described first is anti-
The light beam that saturating face is reflected is maintained in the beam path and transmits completely into the corresponding beam path.
Further, when being equipped with the anti-saturating face of two or more second in any beam path of the horizontal extension waveguide
When, each anti-face thoroughly in each beam path is parallel to each other and is placed equidistant with, and any described second anti-face thoroughly is set
It is placed in the focal position of light beam in the beam path.
The embodiment of the present application also provides a kind of light source module group, is used cooperatively with imaging expanded mode group above-mentioned, the light source
Mould group includes: laser, combined beam unit, self-focusing lens and micro-electromechanical system (MEMS) scanning mirror, wherein
The laser generates laser beam and is input to the combined beam unit, and the combined beam unit exports the laser
Multi-path laser light beam to close beam be that laser is exported to the self-focusing lens all the way, the self-focusing lens will be closed and is emitted after beam
Laser beam is collimated into light pencil and exports to the MEMS scanning mirror to be scanned output.
Further, the light source module group further include: the collimation lens being set on the MEMS scanning mirror emitting light path,
The sweep center point of the MEMS scanning mirror is located on the front focal plane of the collimation lens, and the collimation lens sweeps the MEMS
The laser beam for retouching scarnning mirror output carries out collimation processing.
The embodiment of the present application also provides another light source module group, is used cooperatively with imaging expanded mode group above-mentioned, the light
Source mould group includes: laser, combined beam unit, collimation lens, image source and spectrophotometric unit, wherein
The laser beam that the laser generates closes beam through the combined beam unit and is input to the collimation lens, through the standard
Straight collimated is at illuminating bundle and exports to the spectrophotometric unit；
First incidence end of the spectrophotometric unit is set on the emitting light path of the combined beam unit, first exit end
It being set in the input path in described image source, the laser beam being emitted from first exit end acts on described image source,
Described image source is modulated the second incidence end of back reflection to the spectrophotometric unit to the laser beam of input, and from described point
Second exit end of light unit exports.
Further, the light source module group further includes microscope group, includes: focus lamp, diaphragm and collimating mirror in the microscope group,
In,
The laser beam being emitted from second exit end of the spectrophotometric unit is input to the focus lamp and is focused,
The diaphragm is set in focal position, is exported to filter out advanced sub-beams, then after carrying out collimation processing by the collimating mirror.
The embodiment of the present application also provides a kind of near-eye display system, including imaging expanded mode group above-mentioned and light source module group.
The embodiment of the present application also provides a kind of near-eye display device, and the near-eye display device shows as augmented reality and sets
It is standby, include at least a set of near-eye display system above-mentioned, in the near-eye display system light beam of horizontal extension waveguide outgoing into
Enter human eye, and external environment light enters human eye through the horizontal extension waveguide.
The embodiment of the present application also provides another near-eye display device, and the near-eye display device is used as virtual reality and shows
Equipment, including two sets of near-eye display systems above-mentioned, the light that wherein horizontal extension waveguide is emitted in first set near-eye display system
Beam enters left eye, and the light beam that horizontal extension waveguide is emitted in second set of near-eye display system enters right eye.
Following technical effect may be implemented using the technical solution in the embodiment of the present application:
By vertically extending waveguide and horizontal extension waveguide, the laser beam for exporting image source is in vertical direction and level
Direction is extended, so that the pleasing to the eye range of the laser beam exported from horizontal extension waveguide is in water when showing imaging
Gentle vertical twocouese effectively increases, can effectively cover nearly eye display when human eye it is observed that range, solve out
The light beam penetrated leads to the lesser defect of areas imaging because of field angle deficiency.
Also, any beam laser beam of the anti-outgoing of face thoroughly of any second be imaged in expanded mode group, corresponds in image
A pixel, and therefore each second anti-whole laser beam that face is emitted thoroughly, corresponding complete image work as people
When eye rotation, complete image can be observed in different directions in pupil, will not can only observe towards difference because of pupil
To topography.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of laser scanning display schematic illustration provided by the embodiments of the present application；
Fig. 2 is a kind of structural schematic diagram of near-eye display system provided by the embodiments of the present application；
Fig. 3 a is a kind of structural schematic diagram of waveguide provided by the embodiments of the present application；
Fig. 3 b, 3c are the schematic diagrames of waveguide emergent pupil spacing provided by the embodiments of the present application；
Fig. 3 d is a kind of structural schematic diagram of waveguide in a special embodiment provided by the embodiments of the present application；
Fig. 4 a is the structural schematic diagram of the waveguide provided by the embodiments of the present application in the case where the nearly eye in part shows application scenarios；
Fig. 4 b is the schematic diagram that light beam is transmitted in traditional waveguide；
Fig. 5 is the concrete structure schematic diagram of the first light source module group 20 provided by the embodiments of the present application；
Fig. 6 is the concrete structure schematic diagram of second of light source module group 20 provided by the embodiments of the present application；
Fig. 7 is the concrete structure schematic diagram of the third light source module group 20 provided by the embodiments of the present application；
Fig. 8 is the concrete structure schematic diagram of imaging expanded mode group 30 provided by the embodiments of the present application；
Fig. 9 is transmission schematic diagram of the laser beam provided by the embodiments of the present application in imaging expanded mode group 30；
Figure 10 is the concrete structure schematic diagram of horizontal extension waveguide 302 provided by the embodiments of the present application；
Figure 11 is the schematic diagram that laser beam provided by the embodiments of the present application is emitted from imaging expanded mode group；
Figure 12 a is a kind of near-eye display device schematic diagram provided by the embodiments of the present application；
Figure 12 b is another near-eye display device schematic diagram provided by the embodiments of the present application.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to related invention is illustrated only in attached drawing.
For ease of understanding, illustrate the basic principle of laser scanning imaging first.As shown in Figure 1 it is schematic diagram, is wrapped in Fig. 1
It includes: laser light source 101, scanning module 102 and human eye retina 103.
When showing imaging, the laser that laser light source issues acts on a certain pixel, just after scanning module exports
The scanning to the pixel is realized, is controlled by scanning module, the laser beam of output is moved to next pixel and is scanned.
In other words, through scanning module output laser beam will according to certain sequence in each pixel position with corresponding color, ash
Degree or brightness are lighted.In the time of a frame, laser beam traverses each pixel with sufficiently high speed, due to human eye
Observation things has " persistence of vision " that old friend's eye just can not discover movement of the laser beam on each location of pixels,
But see the complete image of a width (in Fig. 1, user is it can be seen that content is shown as the image of " Hi ").Certainly, shown in Fig. 1
Content out be intended merely to briefly describe nearly eye show in laser scanning imaging basic principle, in order to understand that the application is implemented
Technical solution in example, and should not be used as the restriction to the application.
With reference to Fig. 2, for a kind of near-eye display system provided in the embodiment of the present application.As shown in Fig. 2, the nearly eye display system
System includes: light source module group 20 and imaging expanded mode group 30.Wherein,
Light source module group 20 generates the laser beam comprising image information, and laser beam is exported to imaging expanded mode group
30。
The waveguide that expanded mode group 30 includes vertical direction and horizontal direction is imaged, to the laser exported by light source module group 20
Light beam carries out the extension on both vertically and horizontally.The laser beam for being input to imaging expanded mode group 30 is defeated by vertical waveguide
Out to horizontal waveguide, then the multiple Exit positions output being arranged from horizontal waveguide.
Extension by above-mentioned imaging expanded mode group to light beam can more efficiently increase the range of light beam emergent pupil, solution
The light beam being emitted of having determined leads to the lesser defect of areas imaging because of field angle deficiency.
To realize that the application near-eye display system to the extension effect of light beam, also provides a kind of wave in the embodiment of the present application
It leads, applies and show in scene that structure can refer to Fig. 3 a in nearly eye.Specifically, Fig. 3 a is waveguide 100 along direction of beam propagation
Schematic cross-section, waveguide 100 is interior in the transmission path of light beam, and the index distribution satisfaction of medium is poly- on position at least one
The index distribution of focus lens, to be focused to the light beam transmitted in waveguide 100, wherein focal position is located at waveguide 100
It is interior.For the ease of intuitivism apprehension, the position L that condenser lens index distribution is met at three is shown altogether in fig. 3 aA~c, LA~c?
It is indicated using dark color, since the index distribution of this medium at three on position meets the index distribution of condenser lens,
Position LA~cOn medium can play the role of condenser lens, that is, external beam is input to waveguide 100, light beam is by position
La, influenced by medium refraction index distribution, light beam is in position faIt focuses, and continues to propagate in waveguide 100, similarly, warp
Cross position Lb、LcLight beam be similarly subjected to medium refraction index distribution influence, in position fb、fcIt focuses.
In practical applications, corresponding decoupling element can be used (such as: reflection microscope group, reflection waveguide or other changeable
The optical device of direction of beam propagation) by the light beam transmitted along waveguide 100 from waveguide 100 decoupling.At this point, if along light beam
The propagation path index distribution that there is the index distribution of medium in plurality of positions to meet condenser lens, then, arbitrary neighborhood
The spacing of the corresponding emergent pupil in position is not more than the average minimum diameter of pupil of human at two.Specifically, emergent pupil described here,
Being regarded as light beam, (picture here should not only be interpreted as image, and should refer to optical system from imaging after the outgoing of waveguide 100
Of broad scope picture in system).With reference to Fig. 3 b, it is assumed that in position LA~cCorresponding focal position fA~cOn, make through decoupling element
With each outgoing light beam all the way respectively, since any road light beam can all be imaged, so, the distance of the corresponding emergent pupil of adjacent two-way light beam
As distance d shown in Fig. 3 a is (that is, adjacent position LaWith Lb, LbWith LcThe spacing of corresponding emergent pupil is d), it is clear that if gone out
The spacing d of pupil is not more than pupil of human average minimum diameter, then, when pupil of human position between each emergent pupil, from wave
The light beam for leading 100 outgoing can expose in pupil of human, to ensure that visual field will not disappear.On the contrary, if between emergent pupil
It is greater than pupil of human average minimum diameter away from d, then when pupil of human position between each emergent pupil, is emitted from waveguide 100
Light beam just cannot expose in pupil of human, and causing visual field to disappear (that is, when position of the pupil between emergent pupil, can't see and appoint
What image).
With reference to Fig. 3 c, in practical applications, the light beam being emitted from waveguide 100 there is likely to be certain field angle, for
This situation, the spacing of the emergent pupil of adjacent beams are similarly distance d, and distance d is likewise not greater than pupil of human average minimum diameter.
Generally, in the case where just common eye, the range of the average diameter of pupil of human is 2~5mm, therefore in this Shen
In embodiment please, the spacing of emergent pupil can specifically be not more than 2mm, to ensure that human eye in rotation, visual field will not occur
The case where disappearance.
What needs to be explained here is that emergent pupil spacing corresponding to arbitrary neighborhood position, is exactly light based on shown in Fig. 3 b, 3c
The spacing of eye point when beam is emitted from waveguide.
Certainly, in the case where meeting aforementioned condition, in Fig. 3 a~3c, position LaAnd LbSpacing, position LbAnd LcBetween
Away from being all larger than position LaTo fa, position LbTo fbOr position LcTo fcDistance.Certainly, the spacing of each position can be identical, can also
, specifically will be set according to the needs of practical application with difference, it is not specific here to limit.
Generally, it is shown in scene in nearly eye, if there is the index distribution of medium in plurality of positions along transmission path
Meet the index distribution of condenser lens, then the index distribution of medium is identical in each position, preferably shows effect to realize
Fruit.
Certainly, in practical applications, some more special waveguiding structures can also be used.With reference to Fig. 3 b, waveguide 110 by
Waveguide 110a and waveguide 110b are collectively formed, and position L at least one is equipped between waveguide 110a and waveguide 110bd, refraction
The index distribution that rate distribution meets condenser lens passes through position L after incident beam transmits a distance in waveguide 110ad
It is input to waveguide 110b, light beam will focus in 110b.Although at this point, waveguide 110a transmission light beam in waveguide 110b
It is middle to focus, but since waveguide 110a and waveguide 110b together constitute waveguide 110, therefore it is believed that the focal position of light beam exists
In waveguide 110.Certainly, special waveguiding structure shown in Fig. 3 b is not construed as the restriction to the application.
With reference to Fig. 4 a, as a kind of embodiment for more showing scene close to the nearly eye of the application, the light beam in waveguide 100
Focal position be equipped with anti-face 200 thoroughly, anti-face 200 thoroughly and the propagation path of light beam are in predetermined angle.Specifically, in a kind of feelings
Under condition, anti-face 200 thoroughly can be the inclined-plane for carrying out being formed after fine cut in waveguide 100, and certainly, the inclined-plane is relative to light beam
The tilt angle of propagation path can be configured according to the needs of practical application, here and without specifically limiting.On inclined-plane
After formation, can further be added on inclined-plane can anti-permeable membrane layer, to form anti-face 200 thoroughly.
And in another case, anti-face 200 thoroughly can be the dielectric layer that the setting in waveguide 100 has anti-permeability,
To form anti-face 200 thoroughly.
From Fig. 4 a as it can be seen that beam propagation to it is anti-thoroughly face 200 when, a part by it is anti-thoroughly face 200 reflect, from waveguide 100 output；
Another part transmits in waveguide 100 through anti-face 200 thoroughly, continuation.Obviously, anti-saturating face is set on the focal position of light beam
200, be conducive to increase angle when light beam is emitted from waveguide 100.
For the ease of intuitivism apprehension, it can refer to Fig. 4 b, the transmission feature of conventional waveguide shown in Fig. 4 b, that is, external
After light beam is input to waveguide 100 ', its propagation path straightline propagation can be kept, if setting is corresponding anti-saturating in waveguide 100 '
Face 200 ' just as shown in Figure 4 b, is reflected although the light beam that propagated in waveguide 100 ' can also be reflected by output through anti-face 200 ' thoroughly
Beam exit range it is smaller, be not diffusion after beam exit, still straight state kept to export, and in fig.4, often
The light beam that output is reflected in a anti-face 200 thoroughly is all the propagation of diffusion type, and the area of light beam covering is bigger, applies and shows in nearly eye
Scene under when, field angle is also just bigger, is conducive to nearly eye and shows.
Based on foregoing teachings, the specific structure of each mould group in above-mentioned near-eye display system is described more detail below.
It is a kind of light source module group 20 provided by the embodiments of the present application, comprising: 201 combined beam unit 202 of laser with reference to Fig. 5
And scanning element 203, in which:
Laser 201 generates laser beam and is input to combined beam unit 202.In the embodiment of the present application, laser 201 is specific
It can be: the lasers such as atomic laser, ion laser or semiconductor laser.Generally, can be used red (R),
Green (G), blue (B) mono-colour laser or white laser device are (it should be understood that white laser can pass through corresponding optical device point
From for tri- kinds of one-wavelength lasers of aforementioned RGB), certainly, the laser light source of corresponding color will be specifically selected according to the needs of practical application,
Here without concrete restriction.The laser beam as caused by laser 201 usually may be two beams even multiple laser, therefore
It needs to be input to combined beam unit 202 to carry out closing beam processing.
It is that laser is exported to scanning element all the way that the multi-path laser light beam that laser 201 exports is closed beam by combined beam unit 202
203。
As the possible embodiment of one of the application, scanning element 203 specifically can be MEMS (Micro-
Elector-Mechanical System, MEMS) scanning mirror, when practical application, two-dimentional MEMS scanning mirror or two one can be used
MEMS scanning mirror is tieed up, to realize the scanning of two-dimensional directional, corresponding scanning light beam can be transmitted to imaging expanded mode group 30 (in Fig. 3
Arrow characterization laser the direction of propagation).
It is another light source module group 20 provided by the embodiments of the present application, specifically, being produced by laser 201 with reference to Fig. 6
It gives birth to and the laser beam that is emitted can first pass through after fiber coupling component 204 is coupled into optical fiber, then be input in a manner of optical fiber
Combined beam unit 202.In the embodiment of the present application, combined beam unit 202 specifically can be optical-fiber bundling device, can be coupled in aforementioned
Laser beam in optical fiber closes beam and exports to self-focusing lens 205, self-focusing lens 205 will close the laser alignment that is emitted after beam at
Light pencil is exported to scanning element 203 (scanning element 203 in the present embodiment is still the MEMS scanning mirror in above-described embodiment).
The scanning light beam that scanning element 203 exports, which is exported to collimation lens 206, carries out collimation processing, and is transmitted to imaging and expands
Zhan Mo group 30 (direction of propagation of the arrow characterization laser in Fig. 6).
With reference to Fig. 7, for another light source module group 20 provided in the embodiment of the present application, comprising: laser 201 closes Shu Dan
First 202, fiber coupling component 204, collimation lens 206, driver 209, image source 210, spectrophotometric unit 211, microscope group 212,
In,
Under the action of driver 209, the laser beam that laser 201 generates is through 204 coupling input of fiber coupling component
It exports after to optical fiber to combined beam unit 202, then closes beam through combined beam unit 202 and export to collimation lens 206, collimated lens 206
It is collimated into illuminating bundle and exports to spectrophotometric unit 211.First incidence end 2111 of spectrophotometric unit 211 is set to combined beam unit
On 202 emitting light path, the first exit end 2112 is set in the input path of image source 210.Go out from spectrophotometric unit 211 first
The laser beam for penetrating 2112 outgoing of end acts on image source 210.It may include acting on laser 201 in driver 209 therein
Laser driving plate.
In the embodiment of the present application, image source 210 can for liquid crystal on silicon (Liquid Crystal On Silicon,
LCOS) chip, driver 209 may also include the LCOS driving plate that LCOS chip is based on, to drive LCOS chip.And it is divided
Unit 211 can be Amici prism, can specifically be made of single prism, can also be formed by a pair of or multiple prism cementings.One
In a little specific embodiments, polarization splitting prism (Polarization Beam Splitter, PBS) is can be used in spectrophotometric unit 211,
In the case, the laser beam for being input to spectrophotometric unit 211 can be S light, after 211 light-splitting processing of spectrophotometric unit, laser
Light beam is diverted output and is modulated the second incidence end for being changed into P light, and reflexing to spectrophotometric unit 211 to LCOS chip
2113, due to the characteristic of PBS itself, P light can pass therethrough after being input to spectrophotometric unit 211, thus through spectrophotometric unit 211
Two exit ends 2114 are exported to microscope group 212.Certainly, as can be seen from Figure 7, the first exit end 2112 and second of spectrophotometric unit 211 enters
End 2113 is penetrated in the same side.
It may include focus lamp 2121, diaphragm 2122 and collimating mirror 2123 in microscope group 212.It is emitted from spectrophotometric unit 211 second
The laser beam of 2114 outgoing of end is input to focus lamp 2121 and is focused, and diaphragm 2122 is arranged in focal position, filters out advanced
Sub-beams, then export after carrying out collimation processing by collimating mirror 2123 to imaging expanded mode group 30.
Imaging expanded mode group is described in detail below, it should be appreciated that in the imaging expanded mode group in the embodiment of the present application
Waveguide above-mentioned will be used.Specifically:
With reference to Fig. 8, for a kind of specific structure that expanded mode group 30 is imaged.As can be seen from Fig. 8, imaging expanded mode group 30 includes
Vertical extension waveguide 301 and horizontal extension waveguide 302.The incidence end of vertical extension waveguide 301 is set to going out for light source module group 20
It penetrates in optical path, the incidence end of horizontal extension waveguide 302 is set on the emitting light path of vertical extension waveguide 301.
In the embodiment of the present application, vertically extending waveguide 301 can be the solid of cuboid, cylindrical body or other shapes
Structure.Vertical extension waveguide 301 can be structure as a whole with horizontal extension waveguide 302, or structure independently.
In FIG. 8, it can be seen that being vertically provided with the anti-saturating face of several first to be parallel to each other along longitudinally in extension waveguide 301
3011.In the embodiment of the present application, on the first anti-light receiving surface in face 3011 thoroughly added with can anti-permeable membrane layer, therefore the first anti-saturating face
3011 other than with light transmission function, also has reflectivity.The lengthwise side in each first anti-face 3011 thoroughly and vertical extension waveguide 301
To the angle in setting, so that can be input in horizontal extension waveguide 302 through the first laser beam that face 3011 is reflected anti-thoroughly.
Specifically, after laser beam is inputted from the incidence end of vertical extension waveguide 301, by first anti-saturating face, there is portion
To horizontal extension waveguide 302, another part laser beam can pass through first anti-face irradiation thoroughly for output after dividing laser beam to be reflected
To second anti-face thoroughly, and so on, until laser beam expose in vertical extension waveguide 301 the last one is anti-saturating
Face, and anti-thoroughly face is fully reflective is input to horizontal extension waveguide 302 by the last one.
What needs to be explained here is that as one of the application may mode, it is vertical to extend the be arranged in waveguide 301
One anti-saturating face 3011, which can be, carries out the inclined-plane formed after fine cut in vertically extension waveguide 301, further can be oblique at this
On face addition can anti-permeable membrane layer, form the first anti-face 3011 thoroughly.
And as the alternatively possible mode in the application, it is vertical to extend the anti-face 3011 thoroughly of first be arranged in waveguide 301
It can be and add corresponding thin-layered medium (thin-layered medium have can instead can saturating characteristic) in vertically extension waveguide 301, formed
First anti-face 3011 thoroughly.
Certainly, it specifically selects any in above two mode, specifically will also determine according to the needs of practical application.
Also, above two mode may also be combined with use, that is, a part first is anti-, and face can be by previous thoroughly in vertically extension waveguide
Kind mode form, the anti-face thoroughly of a part first can be formed by latter approach.Here the restriction to the application should not constituted.
The beam path 3021 being parallel to each other in horizontal extension waveguide 302 comprising multichannel, per beam path 3021 all the way
Incidence end is opposite with the first anti-emitting light path in face 3011 thoroughly in vertical extension waveguide 301 respectively, therefore by the first anti-saturating face
3011 laser reflected can be precisely input in corresponding beam path 3021.Preferably, vertically in extension waveguide 301
Any first light beam that face 3011 is reflected anti-thoroughly can be completely into corresponding beam path 3021, and it is logical to be maintained at the light beam
It is transmitted in road 3021.In other words, it is illustrated for vertically extending first in waveguide 301 first anti-face 3011 thoroughly, it should
First anti-face 3011 thoroughly will be deflected using side t as fixing axle, to be in set with the longitudinally of vertical extension waveguide 301
Fixed angle, without being tilted in the other direction.Here the restriction to the application should not constituted.
In addition, be provided on horizontal extension waveguide 302 is per the path of beam path 3021 all the way at least one second
Anti- face 3022 thoroughly, the second anti-face 3022 thoroughly equally have reflexive and translucency.Similar in forenamed vertical extension waveguide 301
First anti-face 3011 thoroughly, per second in beam path 3021 all the way, anti-face 3022 and the longitudinally of beam path 3021 thoroughly are in
The angle of setting, therefore after the laser beam for vertically extending the outgoing of waveguide 301 is input to beam path 3021, beam path 3021
On the second anti-face 3022 thoroughly laser beam can be reflected to output to human eye.
It is similar with the first anti-face 3011 thoroughly in forenamed vertical extension waveguide 301, it can be in horizontal extension waveguide 302
Inclined-plane is formed after carrying out fine cut per beam path 3021 all the way, and can further add on the inclined-plane can anti-permeable membrane
Layer forms the second anti-face 3022 thoroughly；Or in per beam path 3021 all the way setting can instead can be saturating thin-layered medium, shape
At the second anti-face 3022 thoroughly.Here the restriction to the application should not equally be constituted.
Certainly, it as one of the application embodiment, in fig. 8, is provided in every beam path 3021 all the way multiple
Second anti-face 3022 thoroughly, then, when being equipped with the multiple second anti-faces 3022 thoroughly in every beam path 3021 all the way, multiple second is anti-
Saturating face 3022 is parallel to each other and is placed equidistant with.
It should be noted that in the embodiment of the present application, multichannel beam path 3021 in horizontal extension waveguide 302 can be with
It is the channel-type structure being independently arranged in horizontal extension waveguide 302, is also possible to through optical element in horizontal extension waveguide
The propagation path of laser beam is controlled in 302 and is formed.
Here it stresses latter approach: in this mode, self-focusing lens can be set in horizontal extension waveguide 302
Array (alternatively, selfoc lens array can also be used to constitute horizontal extension waveguide 302, is not specifically limited herein), so as to
The path that control laser beam is propagated in horizontal extension waveguide 302, to form each road beam path 3021.
Specifically, it can refer to Fig. 9, be the schematic diagram that laser beam transmits in imaging expanded mode group 30, in Fig. 9,
Laser beam is input to horizontal extension waveguide 302 after the anti-reflection of face 3011 thoroughly of first in vertically extension waveguide 301, at this time
Laser beam is made of a large amount of superfine light beams, after propagating certain distance, a large amount of superfine light beams by horizontal extension waveguide 302 from
Condenser lens effect, focuses at the L1 of position.Position L1 is provided with the second anti-face 3022 thoroughly, just it has been observed that a part of laser
Light beam is continued after penetrating the second anti-face 3022 thoroughly in light by the second anti-reflection output of face 3022 thoroughly, another part laser beam
It is propagated in Shu Tonglu 3021.As can be seen from Fig. 9, it is propagated to through second laser beam that face 3022 is transmitted anti-thoroughly from position L1
During the L2 of position, by the effect of self-focusing lens, focuses at the L2 of position after collimation, be provided at the L2 of the position once more
Another second anti-face 3022 thoroughly, to carry out light-splitting processing to laser beam.And so on, laser beam is in self-focusing lens battle array
Under the action of column, carries out the collimation of periodic, focuses, until the laser beam being input in horizontal extension waveguide 302 is by whole
Reflection output.
Based on above content it is found that in any beam path 3021, the second anti-face 3022 thoroughly is set to laser beam
Focal position (certainly, only shows 3 second anti-faces 3022 thoroughly for ease of description, in Fig. 9, is not construed as to the application
Restriction).
Also, it is understood that ground, there are in the case where the multiple second anti-face 3022 thoroughly in same beam path 3021, respectively
The spacing in the second anti-face 3022 thoroughly is usually closely related with the focal position of laser beam, and passes through setting selfoc lens array
In each self-focusing lens itself the parameters such as refractive index, thickness, specific focal position can be controlled in beam path 3021.When
It so, will also be with specific reference to reality in the spacing being arranged between how many a focal positions and each focal position in beam path 3021
The needs of border application are determined.In a kind of embodiment of the application, the quantity of the focal position in beam path 3021 and
Away from should make be imaged display during can guarantee user viewing when will not lose field of view because of eye rotation.
With reference to Figure 10, as a kind of feasible mode, opened up in every beam path 3021 all the way of horizontal extension waveguide 302
There are multiple exit portals 3023, the anti-face 3022 thoroughly in corresponding one second of the position of each exit portal 3023, so that by any
Second laser beam that face 3022 is reflected anti-thoroughly can be emitted from the exit portal 3023 mutually coped with.In the embodiment of the present application, out
The shape of loophole 3023 can be rectangle, square, circle or other do not influence the geometry of beam exit, analogously,
The size of exit portal 3023 should not equally influence the second laser beam outgoing that face 3022 is reflected anti-thoroughly.Certainly, exit portal
3023 shape, size, specifically will also be configured according to the needs of practical application, be not construed as here to the application's
It limits.
In practical applications, different reflections can be set for the above-mentioned first anti-face 3011 thoroughly or the second anti-face 3022 thoroughly
Rate.Such as: it, can be anti-by first for face 3011 thoroughly anti-for therein multiple first for vertically extending waveguide 301
The reflectivity in saturating face is set as 20%, sets 25% for the reflectivity in second anti-face thoroughly, by the reflection in the anti-face thoroughly of third
Rate is set as 33%, sets 50% for the reflectivity in the 4th anti-face thoroughly, sets the reflectivity in the 5th anti-face thoroughly to
100%, the laser intensity of 5 anti-reflections of face thoroughly is the 20% of total light intensity as a result,.It is to be appreciated that from horizontal extension waveguide
The brightness uniformity of 302 each the second light beam that face 3022 is emitted anti-thoroughly, to realize preferable display effect.
It can refer to Figure 11, be imaged due to being equipped with the multiple second anti-saturating faces in expanded mode group, so that the laser beam of outgoing can
To be adequately coated the field range of human eye, then, no matter human eye left-right rotation or rotate upwardly and downwardly, is in laser beam
In coverage area.Also, any beam laser beam of the anti-outgoing of face thoroughly of any second be imaged in expanded mode group, corresponds to image
In a pixel, and each second anti-whole laser beam that face is emitted thoroughly, corresponding complete image, therefore, when
When human eye rotates, complete image can be observed in different directions in pupil, will not can only see towards difference because of pupil
Observe topography.
Certainly, vertically the size of extension waveguide 301 and horizontal extension waveguide 302 usually can institute according to the needs of practical application
It determines, as one of the embodiment of the present application feasible pattern, human eye is horizontal when the length of horizontal extension waveguide and nearly eye are shown
Rotation institute it is observed that range match, the width of horizontal extension waveguide 302 (that is, the length for vertically extending waveguide 301)
With nearly eye show when human eye rotate vertically it is observed that range match.It should be understood that vertical extension waveguide 301 and horizontal expansion
Size of the waveguide 302 usually with the imaging lens of near-eye display device is opened up to match.
In practical applications, near-eye display system provided by the embodiment of the present application can be applied to such as AR equipment or VR
In the near-eye display devices such as equipment.
Specifically, the near-eye display device in the embodiment of the present application includes that nearly eye described at least a set of foregoing teachings is aobvious
Show system.
With reference to Figure 12 a, near-eye display device shows equipment, the near-eye display device in the case of this mainly as augmented reality
In can only include a set of near-eye display system S1, in the near-eye display system S1 horizontal extension waveguide be emitted light can enter
Human eye, meanwhile, external environment light also can pass through horizontal extension waveguide and enter human eye, so that user watches corresponding increasing
Strong real world images.Certainly, a kind of possible form of near-eye display device is shown in Figure 12 a, that is, use integrally formed eyeglass
(that is, left and right eyeglass non-individual separate), the horizontal extension waveguide in near-eye display system S1 can be used as the integrally formed eyeglass.
With reference to Figure 12 b, near-eye display device shows equipment, the near-eye display device in the case of this mainly as virtual reality
Comprising two sets of near-eye display systems, the light that wherein horizontal extension waveguide is emitted in first set near-eye display system S3 enters a left side
, the light of horizontal extension waveguide outgoing enters right eye in second set of near-eye display system S5.Certainly, it is shown in Figure 12 b close
Eye display a kind of possible form of equipment, that is, horizontal extension waveguide and second set of nearly eye are shown in first set near-eye display system S3
Horizontal extension waveguide in system S5, respectively as two eyeglasses independent in near-eye display device.
Generally, when user states near-eye display device in use, corresponding AR/VR can be watched to scheme by eyeglass
Picture, therefore based on foregoing teachings it is found that the eyeglass of near-eye display device is equipped with horizontal extension waveguide, in order to guarantee enough light
Enough beam path and the second anti-saturating face is arranged in range of exposures, the position that human eye can be corresponded on eyeglass.Here just not after
It repeats more.
Various embodiments are described in a progressive manner in the application, same and similar part between each embodiment
It may refer to each other, each embodiment focuses on the differences from other embodiments.Especially for device, set
For standby and medium class embodiment, since it is substantially similar to the method embodiment, so being described relatively simple, related place ginseng
The part explanation for seeing embodiment of the method, just no longer repeats one by one here.
So far, the specific embodiment of this theme is described.Other embodiments are in the appended claims
In range.In some cases, the movement recorded in detail in the claims can execute and still in a different order
Desired result may be implemented.In addition, process depicted in the drawing not necessarily requires the particular order shown or continuous suitable
Sequence, to realize desired result.In some embodiments, multitasking and parallel processing can be advantageous.
Statement " first ", " second " used in various embodiments of the present disclosure, " first " or " described the
Two " can modify various parts and unrelated with sequence and/or importance, but these statements do not limit corresponding component.The above statement
It is only configured to the purpose for distinguishing element and other elements.For example, the first user equipment and second user equipment indicate different
User equipment, although being both user equipment.For example, first element can under the premise of without departing substantially from the scope of the present disclosure
Referred to as second element, similarly, second element can be referred to as first element.
When an element (for example, first element) referred to as " (operationally or can with another element (for example, second element)
Communicatedly) connection " or " (operationally or communicably) being attached to " another element (for example, second element) or " being connected to " are another
When one element (for example, second element), it is thus understood that an element is connected directly to another element or an element
Another element is indirectly connected to via another element (for example, third element).On the contrary, it is appreciated that when element (for example,
First element) it referred to as " is directly connected to " or when " directly connection " to another element (second element), then without element (for example, the
Three elements) it is inserted between the two.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from foregoing invention design, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (13)
1. a kind of waveguide, which is characterized in that along the transmission path of light beam, at least one, the refractive index of position is divided in the waveguide
Cloth meets the index distribution of condenser lens, to be focused to the light beam transmitted in the waveguide, wherein focal position is located at
In the waveguide.
2. waveguide as described in claim 1, which is characterized in that when the index distribution for having plurality of positions in the transmission path
When meeting the index distribution of condenser lens, spacing being averaged most no more than pupil of human of the corresponding emergent pupil in arbitrary neighborhood position
Minor diameter.
3. waveguide as claimed in claim 2, which is characterized in that the index distribution of the plurality of positions is identical.
4. such as waveguide as claimed in any one of claims 1-3, which is characterized in that the focal position of light beam is equipped in the waveguide
Anti- saturating face, the anti-propagation path of face and light beam thoroughly is in predetermined angle.
5. a kind of imaging expanded mode group, which is characterized in that partly or entirely using described in any claim in preceding claims 1-4
Waveguide, the imaging expanded mode group includes: vertical extension waveguide and horizontal extension waveguide, wherein
The the first anti-saturating face for being equipped with multiple inclinations in the vertical extension waveguide along longitudinally and being parallel to each other；
The beam path being parallel to each other in the horizontal extension waveguide equipped with multichannel, the incidence end difference of each beam path
It is opposite with each described first anti-emitting light path in face thoroughly, at least one second anti-saturating face is equipped in each beam path.
6. imaging expanded mode group as claimed in claim 5, which is characterized in that each described first in the vertical extension waveguide
Anti- face thoroughly is placed equidistant with, and any described first light beam that face is reflected anti-thoroughly is protected completely into the corresponding beam path
It holds and is transmitted in the beam path.
7. imaging expanded mode group as claimed in claim 5, which is characterized in that when any light beam of the horizontal extension waveguide is logical
When being equipped with the anti-saturating face of two or more second in road, each anti-face thoroughly in each beam path is parallel to each other and equidistantly
Setting, and any described second anti-face thoroughly is set to the focal position of light beam in the beam path.
8. a kind of light source module group, which is characterized in that cooperate with imaging expanded mode group described in claim any in claim 5-7
It uses, the light source module group includes: laser, combined beam unit, self-focusing lens and micro-electromechanical system (MEMS) scanning mirror, wherein
The laser generates laser beam and is input to the combined beam unit, and the combined beam unit exports the laser more
It is that laser is exported to the self-focusing lens all the way that road laser beam, which closes beam, and the self-focusing lens will close the laser being emitted after beam
Beam collimation is exported to the MEMS scanning mirror at light pencil to be scanned output.
9. a kind of light source module group, which is characterized in that cooperate with imaging expanded mode group described in claim any in claim 5-7
It uses, the light source module group includes: laser, combined beam unit, collimation lens, image source and spectrophotometric unit, wherein
The laser beam that the laser generates closes beam through the combined beam unit and is input to the collimation lens, saturating through the collimation
Mirror is collimated into illuminating bundle and exports to the spectrophotometric unit；
First incidence end of the spectrophotometric unit is set on the emitting light path of the combined beam unit, the first exit end setting
Described image source is acted in the laser beam in the input path in described image source, being emitted from first exit end, it is described
Image source is modulated the second incidence end of back reflection to the spectrophotometric unit to the laser beam of input, and single from the light splitting
The second exit end output of member.
10. light source module group as claimed in claim 9, which is characterized in that the light source module group further includes microscope group, in the microscope group
It include: focus lamp, diaphragm and collimating mirror, wherein
The laser beam being emitted from second exit end of the spectrophotometric unit is input to the focus lamp and is focused, poly-
The diaphragm is arranged in burnt position, exports to filter out advanced sub-beams, then after carrying out collimation processing by the collimating mirror.
11. a kind of near-eye display system, which is characterized in that extended including imaging described in any claim in claim 5-7
Light source module group described in any claim in mould group and claim 8-10.
12. a kind of near-eye display device, which is characterized in that the near-eye display device shows equipment as augmented reality, at least
Including near-eye display system described in a set of claim 11, the light of horizontal extension waveguide outgoing in the near-eye display system
Beam enters human eye, and external environment light enters human eye through the horizontal extension waveguide.
13. a kind of near-eye display device, which is characterized in that the near-eye display device shows equipment as virtual reality, including
Near-eye display system described in two sets of claims 11, wherein horizontal extension waveguide outgoing in first set near-eye display system
Light beam enters left eye, and the light beam that horizontal extension waveguide is emitted in second set of near-eye display system enters right eye.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811222780.9A CN109239835A (en) | 2018-10-19 | 2018-10-19 | Waveguide, imaging expanded mode group, light source module group, near-eye display system and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811222780.9A CN109239835A (en) | 2018-10-19 | 2018-10-19 | Waveguide, imaging expanded mode group, light source module group, near-eye display system and equipment |
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| CN112444963A (en) * | 2019-08-30 | 2021-03-05 | 成都理想境界科技有限公司 | Light source driving circuit and display module |
| WO2021245664A1 (en) * | 2020-06-01 | 2021-12-09 | Lumus Ltd. | Virtual image delivery system for near eye displays |
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Application publication date: 20190118 |