CN106526861A - AR (Augmented Reality) display device - Google Patents
AR (Augmented Reality) display device Download PDFInfo
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- CN106526861A CN106526861A CN201611168379.2A CN201611168379A CN106526861A CN 106526861 A CN106526861 A CN 106526861A CN 201611168379 A CN201611168379 A CN 201611168379A CN 106526861 A CN106526861 A CN 106526861A
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- reflection
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- 230000003190 augmentative effect Effects 0.000 title abstract description 4
- 230000003287 optical effect Effects 0.000 claims abstract description 122
- 230000005540 biological transmission Effects 0.000 claims abstract description 56
- 230000010287 polarization Effects 0.000 claims abstract description 45
- 238000002310 reflectometry Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 9
- 239000006117 anti-reflective coating Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009738 saturating Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
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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
-
- 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
- G02B2027/0147—Head-up displays characterised by optical features comprising a device modifying the resolution of the displayed image
Abstract
The invention discloses an AR (Augmented Reality) display device for improving the security of virtual image information. The AR display device comprises an image transmission device and an optical multiplexer; the optical multiplexer comprises a first incident port, a second incident port and an emergent port; the image transmission device is arranged toward the first incident port, and the first incident port is used for receiving virtual image light emitted by the image transmission device; the second incident port is used for receiving external ambient light, the second incident port is not coaxial with the first incident port, and the first incident port or the second incident port is opposite to the emergent port; a tilting prism surface is arranged in the optical multiplexer, the optical axes of the second incident port and the first incident port are intersected with the tilting prism surface, and the tilting prism surface enables one part of light shot to the tilting prism surface to be reflected and the other part of light to be transmitted; the AR display device further comprises a first polarizer and a second polarizer; the first polarizer is arranged at the first incident port; the second polarizer is arranged at the second incident port; and the polarization directions of the first polarizer and the second polarizer are perpendicular to each other.
Description
Technical field
The present embodiments relate to display technology field, more particularly to a kind of AR display devices.
Background technology
AR, (Augmented Reality), i.e. augmented reality, is also referred to as mixed reality.It passes through computer technology,
By virtual Information application to real world, real environment and virtual object have been added to same picture or sky in real time
Between simultaneously exist.
Current AR shows, by Wearable, such as glasses or the helmet, to enter with real world
Row is interactive.No matter AR glasses or the AR helmets, interbehavior are all based on transparent display interface, cause the content that AR shows also same
Sample can be known by the external world.So the safety problem of AR display contents is also an important consideration.
By taking AR glasses as an example, image information is transferred to people into lens systems by light reflection channel with optical waveguide technique
Eye.And due to the transparency of display interface, other people can also get from outside and dress my interactive information, information is caused to pacify
It is complete to reveal.
As shown in figure 1, AR glasses include a display and an optical multiplexer, display is used for showing virtual image, virtually
Image is that, according to the position and the virtual scene corresponding with the position for dressing user place come the virtual image for generating, wearing is used
The position that family is located is obtained in real time by carrying out head tracking to wearing user.
Optical multiplexer is synthesized with the light path of real world light for the virtual image light for showing display, then will
Image optical transport after synthesis is to human eye.As shown in Fig. 2 including a half-reflecting half mirror S3 in optical multiplexer, optical multiplexer includes
The light inlet S1 of virtual image light, the light inlet S2 of the real world light of external environment condition, half-reflecting half mirror S3 and light inlet S1, and
Light inlet S2 is oppositely arranged, also including a light-emitting window S4, after virtual image light and external ambient light enter optics, all
There is reflection on the surface of half-reflecting half mirror S3 and transmit, virtual image light occurs the light of reflection on the surface of half-reflecting half mirror S3
Road, is overlapped in the light path that the surface of half-reflecting half mirror S3 occurs transmission with external ambient light, this two-way light path be superimposed after from going out light
Mouth S4 is appeared, and enters human eye.But the safety problem for existing is, virtual image light occurs saturating on the surface of half-reflecting half mirror S3
, there is reflection in a surface S5 (or lens surface of AR glasses) of optical multiplexer in the light path penetrated, reflected light is back to half
The surface of anti-pellicle mirror S3, and there is reflection on the surface of half-reflecting half mirror S3, reflected light path is transmitted and is entered from light inlet S2
External environment condition, if the virtual image light into external environment condition is stolen by other people or equipment, will cause virtual image information
Reveal.
To sum up, exist in prior art, AR equipment lacks display information device for preventing leakage, the figure for causing AR equipment to show
As the problem that information is easily revealed.
The content of the invention
The embodiment of the present invention provides a kind of AR display devices, to solve the figure that AR equipment shows present in prior art
As the problem that information is easily revealed.
The embodiment of the present invention provides a kind of AR display devices, including：
One display and an optical multiplexer；The optical multiplexer includes the first light inlet, the second light inlet and a light-emitting window；
The image projection apparatus of the display are arranged towards first light inlet, and first light inlet is used to receive described image
The virtual image light that grenade instrumentation sends；Second light inlet, for receiving the external ambient light of external environment condition, described second
Light inlet is not coaxially disposed with first light inlet, first light inlet or second light inlet and the light-emitting window phase
To arranging；
One is arranged in the optical multiplexer and inclines faceted pebble, second light inlet, first light inlet optical axis with
The inclination faceted pebble intersects, and the faceted pebble that inclines can make to incide the light part reflection of the tilting prisms, part transmission；
Also include the first polarizer and the second polarizer；First polarizer is arranged at first light inlet；Institute
State the second polarizer to be arranged at second light inlet；The polarization direction of first polarizer and second polarizer
It is orthogonal.
In above-described embodiment, a part of virtual image light λ 1 can be formed along the first polarizer after the first polarizer
The polarised light of polarization direction vibration, through the polarised light for inclining faceted pebble, a series of reflected light paths of Jing can be from the second light inlet
Leak out, because the second polarizer, and the polarization direction of the second polarizer and the first polarization are provided with the second light inlet
The polarization direction of piece is orthogonal, therefore, into the second polarizer polarised light direction of vibration also with the second polarizer
Polarization direction is vertical, according to the light choosing principles of polarizer, can will be perpendicular to the polarization of the polarization direction of the second polarizer
Change is sponged, and then has masked from the second light inlet the virtual image light λ 1 for revealing so that AR display devices possess to be prevented
The function of virtual image leakage of information.
Optionally, the inclination faceted pebble is half-reflection and half-transmission minute surface；
The optical multiplexer includes an optical element, and the inclination faceted pebble is the faceted pebble in the optical element, described
Optical element also includes the first incidence surface and the second incidence surface and exiting surface；First incidence surface is arranged on described first and enters light
At mouthful, second incidence surface is arranged at second light inlet, and the exiting surface is arranged at the light-emitting window.
Optionally, first polarizer is arranged on the surface of first incidence surface, or, first polarizer sets
Put between first incidence surface and described image grenade instrumentation；Second polarizer is arranged on second incidence surface
Surface.
Optionally, the optical axis of first incidence surface and second incidence surface is orthogonal, first incidence surface
Optical axis, the second incidence surface optical axis are 45 ° with the angle of the half-reflection and half-transmission minute surface.
Optionally, the optical element also includes the faceted pebble being oppositely arranged with first incidence surface, plates on the faceted pebble
There is reflecting material, to form a reflection faceted pebble.
Optionally, vertically, the optical axis of second incidence surface is in the horizontal direction for the optical axis of first incidence surface；
The polarization direction of first polarizer is horizontal direction, and the polarization direction of second polarizer is vertical direction.
Optionally, in the horizontal direction, the optical axis of second incidence surface is vertically for the optical axis of first incidence surface；
The polarization direction of first polarizer is vertical direction, and the polarization direction of second polarizer is horizontal direction.
The embodiment of the present invention provides a kind of AR display devices, including：One display and an optical multiplexer；The optical multiplexer
Including the first light inlet, the second light inlet and a light-emitting window；The image projection apparatus of the display enter light towards described first
Mouth is arranged, and first light inlet is used to receive the virtual image light that described image grenade instrumentation sends；Second light inlet,
For receiving the external ambient light of external environment condition, second light inlet is not coaxially disposed with first light inlet edge, described
Light-emitting window is oppositely arranged with second light inlet or first light inlet；
One is arranged in the optical multiplexer and inclines faceted pebble, the inclination faceted pebble can make the light for inciding the tilting prisms
Part reflection, part transmission, second light inlet, the optical axis of first light inlet incline faceted pebble phase with described
Handing over, and the virtual image light for inclining faceted pebble being incident to from first light inlet, reflection occurs in the inclination faceted pebble
Reflected light afterwards is transmitted from the light-emitting window；
Wherein, the surface for inclining faceted pebble arranges an Anti-reflective coating.
Virtual image light λ that image projection apparatus send 1 is through the first light inlet and is incident to inclination faceted pebble, because inclining rib
The surface in face is provided with Anti-reflective coating, therefore, most of virtual image light λ 1 is inclining faceted pebble generation reflection, fraction virtual image
Light λ 1 is inclining faceted pebble generation transmission；External ambient light λ 2 outside AR display devices is incident to inclination from the second light inlet
Faceted pebble, and there is transmission a faceted pebble part is inclined, there is reflection in a part；Wherein, it is most of to incline faceted pebble generation reflection
Virtual image light λ 1, and be superimposed in external ambient light λ 2 for inclining faceted pebble transmission occurring, image light after superposition (includes 1 Hes of λ
2) λ through exiting surface, transmits from the light-emitting window of optical multiplexer, and enters human eye；Fraction is virtual from inclination faceted pebble transmission
Transmit from the second light inlet Jing after optical multiplexer surface, the reflection of inclination faceted pebble after 1 elder generation of image light λ, but because light is less, let out
The virtual image light λ 1 revealed into external environment condition is dark, therefore shows dress relative to the AR for not having anti-leak in prior art completely
For putting, above-mentioned AR display devices also have certain protective effect to virtual image information.
Optionally, the inclination faceted pebble is half-reflection and half-transmission minute surface.
The embodiment of the present invention provides a kind of AR display devices, including：One display and an optical multiplexer；The optical multiplexer
Including the first light inlet, the second light inlet and a light-emitting window；The image projection apparatus of the display enter light towards described first
Mouth is arranged, and first light inlet is used to receive the virtual image light that described image grenade instrumentation sends；Second light inlet,
For receiving the external ambient light of external environment condition, second light inlet is not coaxially disposed with first light inlet, it is described go out
Optical port is oppositely arranged with first light inlet or second light inlet；
One is arranged in the optical multiplexer and inclines faceted pebble, the inclination faceted pebble can make the light for inciding the tilting prisms
Part reflection, part transmission, second light inlet, the optical axis of first light inlet incline faceted pebble phase with described
Handing over, and the virtual image light for inclining faceted pebble being incident to from first light inlet, reflection occurs in the inclination faceted pebble
Reflected light afterwards is transmitted from the light-emitting window；
Wherein, the reflectivity for inclining faceted pebble is more than transmissivity.
In above-described embodiment, virtual image light λ that image projection apparatus send 1 is through the first light inlet and is incident to inclination
Faceted pebble, because the reflectivity for inclining faceted pebble is more than transmissivity, therefore, there is reflection in inclination faceted pebble in most of virtual image light λ 1,
Fraction virtual image light λ 1 is inclining faceted pebble generation transmission；External ambient light λ 2 outside AR display devices enters from second
Optical port is incident to inclination faceted pebble, and transmission occurs a faceted pebble part is inclined, and a part occurs reflection；Wherein, major part is being inclined
There is the virtual image light λ 1 of reflection in slant edge face, be superimposed with external ambient light λ 2 that transmission occurs in inclination faceted pebble, after superposition
Image light (including λ 1 and λ 2) is transmitted from the light-emitting window of optical multiplexer, and enters human eye；Fraction is passed through from inclination faceted pebble
Virtual image light λ 1 is transmitted from the second light inlet Jing after optical multiplexer surface, the reflection of inclination faceted pebble, but because light is less, is let out
The virtual image light λ 1 revealed into external environment condition is dark, therefore shows dress relative to the AR for not having anti-leak in prior art completely
For putting, above-mentioned AR display devices also have certain protective effect to virtual image information.
Description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with present invention enforcement
Example is used for together explaining the present invention, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the structural representation of AR display devices of the prior art；
Fig. 2 is the light path schematic diagram of AR display devices of the prior art；
Fig. 3 a to Fig. 3 c are a kind of structure and light path schematic diagram of AR display devices provided in an embodiment of the present invention；
Fig. 4 is a kind of structure and light path schematic diagram of AR display devices provided in an embodiment of the present invention；
Fig. 5 is a kind of structure and light path schematic diagram of AR display devices provided in an embodiment of the present invention；
Fig. 6 is a kind of structure and light path schematic diagram of AR display devices provided in an embodiment of the present invention；
Fig. 7 is a kind of structure and light path schematic diagram of AR display devices provided in an embodiment of the present invention；
Fig. 8 is a kind of structure and light path schematic diagram of AR display devices provided in an embodiment of the present invention；
Fig. 9 is a kind of structure and light path schematic diagram of AR display devices provided in an embodiment of the present invention.
Specific embodiment
In order to improve the display security of AR equipment, prevent the image information that AR equipment shows from revealing, the embodiment of the present invention
A kind of AR display devices are provided, the AR display devices have virtual image information leakage preventing function.
Embodiment 1
Reference picture 3a to Fig. 3 c, a kind of AR display devices provided in an embodiment of the present invention include：One image projection apparatus, 1 He
One optical multiplexer 2；Optical multiplexer 2 includes the first light inlet 3, the second light inlet 4 and a light-emitting window 5；Image projection apparatus 1
Image projection apparatus 1 are arranged towards the first light inlet 3, and the first light inlet 3 is used to receive the virtual graph that image projection apparatus 1 send
As light λ 1；Second light inlet 4, for receiving external ambient light λ 2 outside AR display devices, the second light inlet 4 and first
Light inlet 3 is not coaxially disposed, and light-emitting window 5 is oppositely arranged with the second light inlet 4；
One is arranged in optical multiplexer 2 and inclines faceted pebble 6, inclining faceted pebble 6 can make to incide the light one of the tilting prisms
Reflection, part transmission, the second light inlet 4, the optical axis of the first light inlet 3 is divided to intersect with inclination faceted pebble 6, and enter from first
Optical port 3 is incident to the virtual image light λ 1 for inclining faceted pebble 6, transmits from light-emitting window 5 the reflected light after faceted pebble 6 occurs reflection is inclined
Go out；Wherein, the second light inlet 4, the optical axis of the first light inlet 3 refer to from the second light inlet 4, the first light inlet 3 enter to inject and incline
The optical axis that the incident light of slant edge mirror is located.
AR display devices also include the first polarizer 7 and the second polarizer 8；First polarizer 7 is arranged on the first light inlet 3
Place；Second polarizer 8 is arranged at the second light inlet 4；First polarizer 7 is hung down with the polarization direction of the second polarizer 8 mutually
Directly.
In above-described embodiment, a part of virtual image light λ 1 can be formed along the first polarizer 7 after the first polarizer 7
Polarization direction vibration polarised light, through the polarised light for inclining faceted pebble 6, a series of reflected light paths of Jing can enter from second
Optical port 4 is leaked out, because being provided with the second polarizer 8 at the second light inlet 4, and the polarization direction of the second polarizer 8 with
The polarization direction of the first polarizer 7 is orthogonal, therefore, into the second polarizer 8 polarised light direction of vibration also with
The polarization direction of two polarizers 8 is vertical, according to the light choosing principles of polarizer, can will be perpendicular to the polarization of the second polarizer 8
The polarization for changing direction is sponged, and then has masked from the second light inlet 4 the virtual image light λ 1 for revealing so that AR shows dress
Put and possessed the function of preventing virtual image leakage of information.
In the embodiment of the present invention, the light direction that enters of the second light inlet 4 and the first light inlet 3 is not necessarily to hang down mutually
Directly, the enter light direction and the light direction that enters of the first light inlet 3 of the second light inlet 4 can be any direction.
Optionally, in the embodiment of the present invention, the first light inlet 3 is not coaxially disposed with light-emitting window 5, including two kinds of situations, the
As shown in Figure 3 a, as shown in Figure 3 b, for Fig. 3 b, tilting prisms have rotated 90 to Fig. 3 a to second situation to a kind of situation
Degree, it is ensured that the virtual reality image light sent from image projection apparatus 1 is transmitted from light-emitting window 5 in the light that tilting prisms occur reflection
Go out.
Optionally, in the embodiment of the present invention, as shown in Figure 3 c, the position of the first light inlet 3 and the second light inlet 4 can be adjusted
Change, the first light inlet 3 is oppositely arranged with light-emitting window 5, and the second light inlet 4 is not coaxially disposed with light-emitting window 5 so that throw from image
The virtual reality image light that injection device 1 sends is transmitted from light-emitting window 5 in the light that tilting prisms occur transmission, from the second light inlet
External ambient light λ 2 of 4 incidences is transmitted from light-emitting window 5 after tilting prisms occur reflection.
Optionally, in above-described embodiment, incline the material being coated with faceted pebble 6 with transmission, reflection function so that incline
Faceted pebble 6 can make to incide the light part reflection of the tilting prisms, part transmission.For example, incline on faceted pebble 6 and plate aerobic
Change zirconium and/or silica.The transmissivity for inclining faceted pebble 6 can be set according to actual conditions with the ratio of reflectivity, and such as transmissivity is
30%, reflectivity is 70%, or transmissivity is 40%, and reflectivity is 60%.Transmissivity can also take which with the ratio of reflectivity
He is worth, and such as 4:3 etc..
Preferably, it is half-reflection and half-transmission minute surface to incline faceted pebble 6, and the reflectivity and transmitance for inclining faceted pebble 6 is 1:1, incide
There is reflection in the light half for inclining faceted pebble 6, half occurs transmission.
Generally, natural light is changed as the light with certain direction of vibration after polarizer.This is due in polarizer
Certain distinctive direction is there is, is called polarization direction, polarizer only allows the light of the vibration parallel to polarization direction
Pass through, while absorbing the light for being perpendicularly to the direction vibration.
Therefore, according to the light path of above-mentioned optical multiplexer 2, a part of virtual image light λ 1, can shape after the first polarizer 7
Into the polarised light of the polarization direction vibration along the first polarizer 7, through the polarised light of half-reflection and half-transmission minute surface, Jing is a series of anti-
Penetrate light path, can go out leak out from the second light inlet 4, because being provided with the second polarizer 8 at the second light inlet 4, and second inclined
Shake piece 8 polarization direction it is orthogonal with the polarization direction of the first polarizer 7, therefore, into the polarization of the second polarizer 8
The direction of vibration of light is also vertical with the polarization direction of the second polarizer 8, according to the light choosing principles of polarizer, can will be perpendicular to
The polarization of the polarization direction of the second polarizer 8 is sponged, and then has masked from the second light inlet 4 virtual image revealed
Light λ 1 so that AR display devices possess the function of preventing virtual image leakage of information.
With reference to the concrete structure of optical multiplexer 2, to prevent virtual image leakage of information to above-mentioned AR display devices
Principle is illustrated.
In preferred embodiment, as shown in figure 4, the optical multiplexer 2 of the embodiment of the present invention includes an optical element, the optics unit
Part is arranged between the first light inlet 3, the second light inlet 4 and a light-emitting window 5, and it is the rib in optical element to incline faceted pebble 6
Face, optical element also include the first incidence surface 9 and the second incidence surface 10 and exiting surface 11；First incidence surface 9 is arranged on first and enters
At optical port 3, the second incidence surface 10 is arranged at the second light inlet 4, and exiting surface 11 is arranged at light-emitting window 5.
For the optical element being arranged in optical multiplexer 2, which includes multiple faceted pebbles, and multiple faceted pebbles at least enter including first
Light face 9, the second incidence surface 10, exiting surface 11 and the faceted pebble being oppositely arranged with the first incidence surface 9.Preferably, with the first incidence surface 9
Reflecting material is coated with the faceted pebble being oppositely arranged, to form a reflection faceted pebble 12.
Preferably, the first polarizer 7 is arranged on the surface of the first incidence surface 9.Optionally, the first polarizer 7 is arranged on
Between one incidence surface 9 and image projection apparatus 1.
Preferably, the second polarizer 8 is arranged on the surface of the second incidence surface 10.
Preferably, the optical axis of the first incidence surface 9 and the second incidence surface 10 is orthogonal, the optical axis of the first incidence surface 9, second
10 optical axis of incidence surface is 45 ° with the angle of half-reflection and half-transmission minute surface.
Based on the structure of above-mentioned several preferred or optional optical element, with the second light inlet 4 and the first light inlet 3
Enter that light direction is orthogonal, the light direction of light-emitting window 5 and the second light inlet 4 enter light direction it is contrary as a example by, above-mentioned optics unit
The light path of part is as follows：
The virtual image light λ 1 that image projection apparatus 1 send becomes a branch of linearly polarized light after the first polarizer 7,
Polarization direction of the direction of vibration of linearly polarized light parallel to the first polarizer 7；Linearly polarized light is through the first incidence surface 9 and incident
To half-reflection and half-transmission minute surface, there is reflection in the linearly polarized light part for being incident to half-reflection and half-transmission minute surface, a part occurs transmission；From
External ambient light λ 2 outside AR display devices is incident to half-reflection and half-transmission minute surface from the second incidence surface 10, and partly instead partly
There is transmission in a lens face part, a part occurs reflection；
Wherein, the linearly polarized light of a part of virtual image half-reflection and half-transmission minute surface occur reflect, and with half-reflecting half mirror
External ambient light λ 2 that transmission occurs is superimposed, and, through exiting surface 11, the light-emitting window 5 from optical multiplexer 2 is saturating for the image light after superposition
Project, and enter human eye.
Wherein, the linearly polarized light of a part of virtual image is incident to reflection faceted pebble 12 through after from half-reflection and half-transmission minute surface, enters
The linearly polarized light for being incident upon reflection faceted pebble 12 is reflected back toward half-reflection and half-transmission minute surface, and secondary reflection occurs in anti-semi-transparent minute surface, half
The linearly polarized light that anti-semi-transparent minute surface occurs secondary reflection sequentially passes through the second incidence surface 10, the second polarizer 8, because of virtual image
The direction of vibration of linearly polarized light is not changed in, therefore, into the second polarizer 8 linearly polarized light direction of vibration still parallel to
The polarization direction of the first polarizer 7, the polarization direction of the second polarizer 8 are mutual with the polarization direction of the first polarizer 7
Vertically, the light choosing principles according to polarizer, the polarized light absorption that can will be perpendicular to the polarization direction of the second polarizer 8 fall,
Linearly polarized light into the second polarizer 8 is blocked by the second polarizer 8 so that the linearly polarized light of virtual image cannot propagate to outer
In portion's environment, so as to the security that the virtual image that ensure that AR display devices shows.
In a kind of preferred embodiment, the AR display devices with reference to shown in Fig. 4, the optical axis of the first incidence surface 9 vertically,
The optical axis of the second incidence surface 10 is in the horizontal direction.The polarization direction of the first polarizer 7 is horizontal direction, the second polarizer 8
Polarization direction is vertical direction.
In this embodiment, the virtual image light λ 1 that image projection apparatus 1 send becomes one after the first polarizer 7
Bunch polarised light, the direction of vibration of linearly polarized light is horizontal direction, and the direction of propagation is vertical direction, and linearly polarized light is vertically
The first incidence surface 9 is incident to, and is vertically incident to half-reflection and half-transmission minute surface, half-reflecting half mirror with the angle of vertical direction is
45 °, there is reflection in the linearly polarized light part for being incident to half-reflection and half-transmission minute surface, a part occurs transmission；From showing from AR
External ambient light λ 2 outside device is incident to half-reflection and half-transmission minute surface from the second incidence surface 10 in the horizontal direction, and partly instead partly
There is transmission in a lens face part, a part occurs reflection；
Wherein, the linearly polarized light of a part of virtual image half-reflection and half-transmission minute surface occur reflect, and with half-reflecting half mirror
Occur transmission external ambient light λ 2 be superimposed, the image light after superposition in the horizontal direction through exiting surface 11, from optical multiplexer 2
Light-emitting window 5 is transmitted, and enters human eye；
Wherein, the linearly polarized light of a part of virtual image is vertically incident to light from half-reflection and half-transmission minute surface through after
The reflection faceted pebble 12 of element is learned, the linearly polarized light for being incident to reflection faceted pebble 12 is vertically reflected back toward half-reflection and half-transmission minute surface,
And there is secondary reflection in anti-semi-transparent minute surface, there is the linearly polarized light of secondary reflection in half-reflection and half-transmission minute surface, in the horizontal direction Jing
The second incidence surface 10 is crossed, and enters the second polarizer 8 in the horizontal direction, because the direction of vibration of the linearly polarized light of virtual image does not have
Change, therefore, the direction of vibration into the linearly polarized light of the second polarizer 8 is still horizontal direction, the polarization of the second polarizer 8
Change direction is vertical direction, according to the light choosing principles of polarizer, can by direction of vibration for horizontal direction Absorption of linearly polarized light
Fall, that is to say, that the linearly polarized light into the second polarizer 8 is blocked by the second polarizer 8 so that the linearly polarized light of virtual image
Cannot propagate in external environment condition, so as to the security that the virtual image that ensure that AR display devices shows.
In another kind of preferred embodiment, the AR display devices with reference to shown in Fig. 5, the optical axis of the first incidence surface 9 is along level side
To the optical axis of the second incidence surface 10 is vertically.The polarization direction of the first polarizer 7 be vertical direction, the second polarizer 8
Polarization direction be horizontal direction.
In such cases, the virtual image light λ 1 that image projection apparatus 1 send becomes one after the first polarizer 7
Bunch polarised light, the direction of vibration of linearly polarized light is vertical direction, and the direction of propagation is horizontal direction, and linearly polarized light is in the horizontal direction
The first incidence surface 9 is incident to, and is incident to half-reflection and half-transmission minute surface in the horizontal direction, half-reflecting half mirror with the angle of vertical direction is
45 °, there is reflection in the linearly polarized light part for being incident to half-reflection and half-transmission minute surface, a part occurs transmission；From showing from AR
External ambient light λ 2 outside device is vertically incident to half-reflection and half-transmission minute surface from the second incidence surface 10, and partly instead partly
There is transmission in a lens face part, a part occurs reflection；
Wherein, the linearly polarized light of a part of virtual image half-reflection and half-transmission minute surface occur reflect, and with half-reflecting half mirror
Occur transmission external ambient light λ 2 be superimposed, the image light after superposition vertically through exiting surface 11, from optical multiplexer 2
Light-emitting window 5 is transmitted, and enters human eye.
Wherein, the linearly polarized light of a part of virtual image is incident to light from half-reflection and half-transmission minute surface through after in the horizontal direction
The reflection faceted pebble 12 of element is learned, the linearly polarized light for being incident to reflection faceted pebble 12 is reflected back toward half-reflection and half-transmission minute surface in the horizontal direction,
And there is secondary reflection in anti-semi-transparent minute surface, there is the linearly polarized light of secondary reflection in half-reflection and half-transmission minute surface, vertically Jing
The second incidence surface 10 is crossed, and vertically enters the second polarizer 8, because the direction of vibration of the linearly polarized light of virtual image does not have
Change, therefore, the direction of vibration into the linearly polarized light of the second polarizer 8 is still vertical direction, the polarization of the second polarizer 8
Change direction is horizontal direction, according to the light choosing principles of polarizer, can by direction of vibration for vertical direction Absorption of linearly polarized light
Fall, that is to say, that the linearly polarized light into the second polarizer 8 is blocked by the second polarizer 8 so that the linearly polarized light of virtual image
Cannot propagate in external environment condition, so as to the security that the virtual image that ensure that AR display devices shows.
Embodiment 2
Additionally, in addition to above-mentioned several AR display devices, the embodiment of the present invention also provides a kind of AR display devices, such as scheme
Shown in 6, specifically include：One image projection apparatus 1 and an optical multiplexer 2；Optical multiplexer 2 includes that the first light inlet 3, second enter light
Mouth 4 and a light-emitting window 5；The image projection apparatus 1 of image projection apparatus 1 are arranged towards the first light inlet 3, the first light inlet 3
For receiving the virtual image light λ 1 that image projection apparatus 1 send；Second light inlet 4, for receiving outside AR display devices
External ambient light λ 2 in portion, the second light inlet 4 are not coaxially disposed with the first light inlet 3, and light-emitting window 5 is relative with the second light inlet 4
Arrange；
One is arranged in optical multiplexer 2 and inclines faceted pebble 6, inclining faceted pebble 6 can make to incide the light one of the tilting prisms
Reflection, part transmission, the second light inlet 4, the optical axis of the first light inlet 3 is divided to intersect with inclination faceted pebble 6, and enter from first
Optical port 3 is incident to the virtual image light λ 1 for inclining faceted pebble 6, transmits from light-emitting window 5 the reflected light after faceted pebble 6 occurs reflection is inclined
Go out；Wherein, on the surface for inclining faceted pebble 6, an Anti-reflective coating 13 is set.
The virtual image light λ 1 that image projection apparatus 1 send is through the first light inlet 3 and is incident to inclination faceted pebble 6, because inclining
The surface in slant edge face 6 is provided with Anti-reflective coating 13, therefore, most of virtual image light λ 1 is inclining the generation reflection of faceted pebble 6, fraction
Virtual image light λ 1 is inclining the generation transmission of faceted pebble 6；External ambient light λ 2 outside AR display devices is from the second light inlet 4
Inclination faceted pebble 6 is incident to, and transmission occurs 6 part of faceted pebble is inclined, a part occurs reflection；Wherein, it is most of to incline
There is the virtual image light λ 1 of reflection in faceted pebble 6, be superimposed with external ambient light λ 2 that transmission occurs in inclination faceted pebble 6, after superposition
Image light (including λ 1 and λ 2) is transmitted from the light-emitting window 5 of optical multiplexer 2, and enters human eye；Fraction is passed through from faceted pebble 6 is inclined
1 elder generations of virtual image light λ after transmit from the second light inlet 4 Jing 2 surface of optical multiplexer, after inclining the reflection of faceted pebble 6, but because of light
Line is less, and the virtual image light λ 1 leaked in external environment condition is dark, therefore relative to completely no anti-leak in prior art
AR display devices for, above-mentioned AR display devices also have certain protective effect to virtual image information.
Optionally, in the embodiment of the present invention, the first light inlet 3 is not coaxially disposed with light-emitting window 5, including two kinds of situations, the
As shown in fig. 7, second situation is for the first situation, tilting prisms have rotated 90 degree to a kind of situation, it is ensured that from figure
As the virtual reality image light that grenade instrumentation 1 sends is transmitted from light-emitting window 5 in the light that tilting prisms occur reflection.
Optionally, in the embodiment of the present invention, the position of the first light inlet 3 and the second light inlet 4 can be exchanged, i.e., with first
Relative 1 position of image projection apparatus of light inlet 3, can be oppositely arranged with light-emitting window 5, and the second light inlet 4 is with light-emitting window 5 not
It is coaxially disposed so that the virtual reality image light sent from image projection apparatus 1 occurs the light of transmission from going out light in tilting prisms
Mouth 5 is transmitted, and external ambient light λ 2 from 4 incidence of the second light inlet is transmitted from light-emitting window 5 after tilting prisms occur reflection
Go out.
Optionally, as shown in fig. 7, optical multiplexer 2 includes an optical element, the optical element be arranged on the first light inlet 3,
Between second light inlet 4 and a light-emitting window 5, it is the faceted pebble in optical element to incline faceted pebble 6, and optical element is also including first
Incidence surface 9 and the second incidence surface 10 and exiting surface 11；First incidence surface 9 is arranged at the first light inlet 3, and the second incidence surface 10 sets
Put at the second light inlet 4, exiting surface 11 is arranged at light-emitting window 5.
Wherein, incline and coating is coated with faceted pebble 6 with transmission, the material of reflection function, can make to incide the inclination
The light part reflection of prism, part transmission.For example, incline on faceted pebble 6 and be coated with zirconium oxide and/or silica.Incline faceted pebble 6
Transmissivity can be set according to actual conditions with the ratio of reflectivity, such as transmissivity be 30%, reflectivity is 70%, or transmission
Rate is 40%, and reflectivity is 60%.Transmissivity can also take other values with the ratio of reflectivity, and such as 4:3 etc..
Preferably, it is half-reflection and half-transmission minute surface to incline faceted pebble 6, and the reflectivity and transmitance for inclining faceted pebble 6 is 1:1, incide
There is reflection in the light half for inclining faceted pebble 6, half occurs transmission.
For the optical element being arranged in optical multiplexer 2, which includes multiple faceted pebbles, and multiple faceted pebbles at least enter including first
Light face 9, the second incidence surface 10, exiting surface 11 and the faceted pebble being oppositely arranged with the first incidence surface 9.
Preferably, reflecting material is coated with the faceted pebble being oppositely arranged with the first incidence surface 9, to form a reflection faceted pebble 12.
Preferably, the optical axis of the first incidence surface 9 and the second incidence surface 10 is orthogonal, the optical axis of the first incidence surface 9, second
10 optical axis of incidence surface is 45 ° with the angle of half-reflection and half-transmission minute surface.
Preferably, half-reflection and half-transmission minute surface and the angle of vertical direction are 45 °.
With reference to AR display devices as shown in Figure 7, the principle of above-mentioned AR display devices is：
The virtual image light λ 1 that image projection apparatus 1 send is through the first incidence surface 9 and is incident to inclination faceted pebble 6, because inclining
The surface in slant edge face 6 is provided with Anti-reflective coating 13, therefore, most of virtual image light λ 1 is inclining the generation reflection of faceted pebble 6, fraction
Virtual image light λ 1 is inclining the generation transmission of faceted pebble 6；External ambient light λ 2 outside AR display devices is from the second incidence surface
10 are incident to inclination faceted pebble 6, and transmission occurs 6 part of faceted pebble is inclined, and a part occurs reflection；Wherein, major part is being inclined
There is the virtual image light λ 1 of reflection in slant edge face 6, be superimposed with external ambient light λ 2 that transmission occurs in inclination faceted pebble 6, after superposition
Image light through exiting surface 11, transmit from the light-emitting window 5 of optical multiplexer 2, and enter human eye；Fraction is from inclination faceted pebble 6
Through virtual image light λ 1 be incident to reflection faceted pebble 12, be incident to reflection faceted pebble 12 virtual image light λ 1 be reflected back toward inclination
Faceted pebble 6, and there is secondary reflection faceted pebble 6 is inclined, AR is transmitted in the virtual image light λ 1 for inclining the generation secondary reflection of faceted pebble 6
In the external environment condition of display device, but because light is less, the virtual image light λ 1 leaked in external environment condition is dark, therefore relatively
For not having the AR display devices of anti-leak completely in prior art, above-mentioned AR display devices also have one to virtual image information
Fixed protective effect.
Embodiment 3
Additionally, in addition to above-mentioned several AR display devices, the embodiment of the present invention also provides a kind of AR display devices, such as scheme
Shown in 8, specifically include：One image projection apparatus 1 and an optical multiplexer 2；Optical multiplexer 2 includes that the first light inlet 3, second enter light
Mouth 4 and a light-emitting window 5；The image projection apparatus 1 of image projection apparatus 1 are arranged towards the first light inlet 3, the first light inlet 3
For receiving the virtual image light λ 1 that image projection apparatus 1 send；Second light inlet 4, for receiving outside AR display devices
External ambient light λ 2 in portion, the second light inlet 4 are not coaxially disposed with the first light inlet 3, and light-emitting window 5 is relative with the second light inlet 4
Arrange；
An optical element is set between first light inlet 3, the second light inlet 4 and a light-emitting window 5, optical element includes one
Individual inclination faceted pebble 6, inclining faceted pebble 6 can make to incide the light part reflection of the tilting prisms, part transmission, incline rib
The reflectivity in face 6 is more than transmissivity, and the second light inlet 4, the light direction that enters of the first light inlet 3 are intersected with inclination faceted pebble 6, so that
The virtual image light λ 1 for inclining faceted pebble 6 is incident to from the first light inlet 3, the reflected light after faceted pebble 6 occurs reflection is being inclined from going out
Optical port 5 is transmitted.
In the embodiment, image projection apparatus 1 send, and virtual image light λ 1 is through the first light inlet 3 and is incident to inclination
Faceted pebble 6, because the reflectivity for inclining faceted pebble 6 is more than transmissivity, therefore, most of virtual image light λ 1 occurs instead in inclination faceted pebble 6
Penetrate, fraction virtual image light λ 1 is inclining the generation transmission of faceted pebble 6；External ambient light λ 2 outside AR display devices is from
Two light inlets 4 are incident to inclination faceted pebble 6, and transmission occurs 6 part of faceted pebble is inclined, and a part occurs reflection；Wherein, big portion
Divide and inclining the virtual image light λ 1 that faceted pebble 6 occurs to reflect, be superimposed with external ambient light λ 2 in the inclination generation transmission of faceted pebble 6,
Image light (including λ 1 and λ 2) after superposition is transmitted from the light-emitting window 5 of optical multiplexer 2, and enters human eye；Fraction is from inclination
The virtual image light λ 1 that faceted pebble 6 is passed through is transmitted from the second light inlet 4 Jing after 2 surface of optical multiplexer, the reflection of inclination faceted pebble 6,
But because light is less, the virtual image light λ 1 leaked in external environment condition is dark, therefore relative to not having in prior art completely
For the AR display devices of anti-leak, above-mentioned AR display devices also have certain protective effect to virtual image information.
Wherein, incline and coating is coated with faceted pebble 6 with transmission, the thin-film material of reflection function, can make to incide described
The light part reflection of tilting prisms, part transmission, the reflectivity of thin-film material are more than transmissivity.
Optionally, in the embodiment of the present invention, the first light inlet 3 is not coaxially disposed with light-emitting window 5, including two kinds of situations, the
As shown in figure 8, second situation is for the first situation, tilting prisms have rotated 90 degree to a kind of situation, it is ensured that from figure
As the virtual reality image light that grenade instrumentation 1 sends is transmitted from light-emitting window 5 in the light that tilting prisms occur reflection.
Optionally, in the embodiment of the present invention, the position of the first light inlet 3 and the second light inlet 4 can be exchanged, i.e., with first
Relative 1 position of image projection apparatus of light inlet 3, can be oppositely arranged with light-emitting window 5, and the second light inlet 4 is with light-emitting window 5 not
It is coaxially disposed so that the virtual reality image light sent from image projection apparatus 1 occurs the light of transmission from going out light in tilting prisms
Mouth 5 is transmitted, and external ambient light λ 2 from 4 incidence of the second light inlet is after tilting prisms occur reflection, saturating from light-emitting window 5
Project.
Optionally, as shown in figure 9, for the optical element being arranged in optical multiplexer 2, which includes multiple faceted pebbles, multiple
Faceted pebble at least includes the first incidence surface 9, the second incidence surface 10, exiting surface 11 and the faceted pebble being oppositely arranged with the first incidence surface 9；Its
In, the first incidence surface 9 is arranged at the first light inlet 3, and the second incidence surface 10 is arranged at the second light inlet 4, and exiting surface 11 sets
Put at light-emitting window 5.Preferably, reflecting material is coated with the faceted pebble being oppositely arranged with the first incidence surface 9, to form a reflection rib
Face 12.
Preferably, the optical axis of the first incidence surface 9 and the second incidence surface 10 is orthogonal, the optical axis of the first incidence surface 9, second
10 optical axis of incidence surface is 45 ° with the angle of inclination faceted pebble 6.
Preferably, it is 45 ° to incline faceted pebble 6 with the angle of vertical direction.
With reference to AR display devices as shown in Figure 9, the principle of above-mentioned AR display devices is：What image projection apparatus 1 sent
Virtual image light λ 1 is through the first incidence surface 9 and is incident to inclination faceted pebble 6, because the reflectivity for inclining faceted pebble 6 is more than transmissivity, because
This, there is reflection in inclination faceted pebble 6 in most of virtual image light λ 1, fraction virtual image light λ 1 occurs in inclination faceted pebble 6
Penetrate；Inclination faceted pebble 6 is incident to from the second incidence surface 10 from external ambient light λ 2 outside AR display devices, and is being inclined
There is transmission in 6 part of slant edge face, a part occurs reflection；Wherein, it is most of to incline the virtual image that faceted pebble 6 occurs to reflect
Light λ 1, with half-reflecting half mirror occur transmission external ambient light λ 2 be superimposed, the image light after superposition through exiting surface 11, from light
The light-emitting window 5 of wave multiplexer 2 is transmitted, and enters human eye；Fraction is incident to instead from the virtual image light λ 1 for inclining the transmission of faceted pebble 6
Faceted pebble 12 is penetrated, the virtual image light λ 1 for being incident to reflection faceted pebble 12 is reflected back toward inclination faceted pebble 6, and occurs two in anti-semi-transparent minute surface
Secondary reflection, is transmitted in external environment condition in the virtual image light λ 1 for inclining the generation secondary reflection of faceted pebble 6, but because light is less, lets out
The virtual image light λ 1 revealed into external environment condition is dark, therefore shows dress relative to the AR for not having anti-leak in prior art completely
For putting, above-mentioned AR display devices also have certain protective effect to virtual image information.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into the had altered of the scope of the invention and change.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of AR display devices, it is characterised in that include：
One image transmission device and an optical multiplexer；The optical multiplexer includes that the first light inlet, the second light inlet and go out light
Mouthful；The image projection apparatus of described image penetrating apparatus are arranged towards first light inlet, and first light inlet is used to connect
Receive the virtual image light that described image grenade instrumentation sends；Second light inlet, for receiving external ambient light, described second
Light inlet is not coaxially disposed with first light inlet, first light inlet or second light inlet and the light-emitting window phase
To arranging；
One is arranged in the optical multiplexer and inclines faceted pebble, second light inlet, first light inlet optical axis with it is described
Incline faceted pebble to intersect, the faceted pebble that inclines can make to incide the light part reflection of the tilting prisms, part transmission；
Also include the first polarizer and the second polarizer；First polarizer is arranged at first light inlet；Described
Two polarizers are arranged at second light inlet；First polarizer is mutual with the polarization direction of second polarizer
Vertically.
2. AR display devices as claimed in claim 1, it is characterised in that the inclination faceted pebble is half-reflection and half-transmission minute surface；
The optical multiplexer includes an optical element, and the inclination faceted pebble is the faceted pebble in the optical element, the optics
Element also includes the first incidence surface and the second incidence surface and exiting surface；First incidence surface is arranged on first light inlet
Place, second incidence surface are arranged at second light inlet, and the exiting surface is arranged at the light-emitting window.
3. AR display devices as claimed in claim 2, it is characterised in that first polarizer is arranged on described first and enters light
The surface in face, or, first polarizer is arranged between first incidence surface and described image grenade instrumentation；Described
Two polarizers are arranged on the surface of second incidence surface.
4. AR display devices as claimed in claim 3, it is characterised in that first incidence surface and second incidence surface
Optical axis is orthogonal, the angle of the optical axis of first incidence surface, the second incidence surface optical axis and the half-reflection and half-transmission minute surface
For 45 °.
5. AR display devices as claimed in claim 1, it is characterised in that the optical element also includes entering light with described first
The faceted pebble that face is oppositely arranged, is coated with reflecting material on the faceted pebble, to form a reflection faceted pebble.
6. AR display devices as any one of claim 1-5, it is characterised in that the optical axis edge of first incidence surface
Vertical direction, the optical axis of second incidence surface is in the horizontal direction；The polarization direction of first polarizer is horizontal direction,
The polarization direction of second polarizer is vertical direction.
7. AR display devices as any one of claim 1-5, it is characterised in that the optical axis edge of first incidence surface
Horizontal direction, the optical axis of second incidence surface is vertically；The polarization direction of first polarizer is vertical direction,
The polarization direction of second polarizer is horizontal direction.
8. a kind of AR display devices, it is characterised in that include：One image transmission device and an optical multiplexer；The optical multiplexer
Including the first light inlet, the second light inlet and a light-emitting window；The image projection apparatus of described image penetrating apparatus are towards described
One light inlet is arranged, and first light inlet is used to receive the virtual image light that described image grenade instrumentation sends；Described second
Light inlet, for receiving the external ambient light of external environment condition, second light inlet is not coaxially set with first light inlet edge
Put, the light-emitting window is oppositely arranged with second light inlet or first light inlet；
One is arranged in the optical multiplexer and inclines faceted pebble, the inclination faceted pebble can make the light one for inciding the tilting prisms
Reflection, part transmission, second light inlet, the optical axis of first light inlet is divided to intersect with the inclination faceted pebble, and
And the virtual image light for inclining faceted pebble is incident to from first light inlet, it is anti-after the inclination faceted pebble occurs reflection
Penetrate light to transmit from the light-emitting window；
Wherein, the surface for inclining faceted pebble arranges an Anti-reflective coating.
9. AR display devices as claimed in claim 8, it is characterised in that the inclination faceted pebble is half-reflection and half-transmission minute surface.
10. a kind of AR display devices, it is characterised in that include：One image transmission device and an optical multiplexer；The optical multiplexer
Including the first light inlet, the second light inlet and a light-emitting window；The image projection apparatus of described image penetrating apparatus are towards described
One light inlet is arranged, and first light inlet is used to receive the virtual image light that described image grenade instrumentation sends；Described second
Light inlet, for receiving the external ambient light of external environment condition, second light inlet is not coaxially disposed with first light inlet,
The light-emitting window is oppositely arranged with first light inlet or second light inlet；
One is arranged in the optical multiplexer and inclines faceted pebble, the inclination faceted pebble can make the light one for inciding the tilting prisms
Reflection, part transmission, second light inlet, the optical axis of first light inlet is divided to intersect with the inclination faceted pebble, and
And the virtual image light for inclining faceted pebble is incident to from first light inlet, it is anti-after the inclination faceted pebble occurs reflection
Penetrate light to transmit from the light-emitting window；
Wherein, the reflectivity for inclining faceted pebble is more than transmissivity.
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| CN201611168379.2A CN106526861A (en) | 2016-12-16 | 2016-12-16 | AR (Augmented Reality) display device |
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| CN201611168379.2A CN106526861A (en) | 2016-12-16 | 2016-12-16 | AR (Augmented Reality) display device |
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