CN104678555A - Tooth-shaped embedding planar waveguide optical device for diopter correction - Google Patents
Tooth-shaped embedding planar waveguide optical device for diopter correction Download PDFInfo
- Publication number
- CN104678555A CN104678555A CN201510036544.8A CN201510036544A CN104678555A CN 104678555 A CN104678555 A CN 104678555A CN 201510036544 A CN201510036544 A CN 201510036544A CN 104678555 A CN104678555 A CN 104678555A
- Authority
- CN
- China
- Prior art keywords
- tooth
- micro
- light
- shape structure
- optical device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention provides a tooth-shaped embedding planar waveguide optical device which has a diopter correction function and can be used for full-eye wearing displaying. The tooth-shaped embedding planar waveguide optical device comprises a display light source, a collimation lens, a coupling input surface, a planar waveguide substrate, a micro tooth-shaped structure and a thin negative lens, wherein the display light source is used for sending displaying light waves for displaying a required image; the collimation lens is used for collimating the light waves sent by the light source; the coupling input surface is used for coupling the collimated light waves to a planar waveguide; the planar waveguide substrate carries out reflection transmission on the coupled light waves to form total-reflection light waves; the micro tooth-shaped structure is used for carrying out coupling output on the total-reflection light waves; the thin negative lens is used for correcting the diopter. The tooth-shaped embedding planar waveguide optical device has the characteristics of convenience in diopter correction, light weight, compact structure, simple processing technology, flexible visual field adding and high light wave coupling efficiency, and can be either used for wearable displaying or the application field of naked-eye 3D displaying of a medical ear mirror, GPS navigation, mobile screen displaying and the like.
Description
Technical field
The present invention relates to a kind of planar waveguide optical device, particularly a kind of profile of tooth that can be used for the display of full eye wearing with diopter correction inlays planar waveguide optical device.
Background technology
Traditional helmet is dressed display and is adopted the reflective structure of 45o to realize.This structure visual field increase and the helmet overall weight in there is very large contradiction.In order to increase visual field, only having the area by increasing 45o reflecting surface to realize, this means that the weight of overall reflective system increases.Usually, helmet wearing display device conveniently wearer does not affect normal behavior while browsing information, utilizes optical element image information to be presented at virtually a distance in human eye front.The core component of this type of optical presentation system is made up of three parts: the coupling of graphical information light wave input module, information light wave transmissions substrate and image light waves coupling output display module.In addition, for the problematic observer of eyesight, diopter correction is also necessary, otherwise by final for impact sharpness of observing image.Therefore, diopter correction, lightweight, compact conformation, Large visual angle and the display of high-resolution image are this type of optical system key issues urgently to be resolved hurrily always.Wherein, diopter correction, lightweight and Large visual angle is particularly important.In some application, observe the size of field range and directly have influence on the safety of personnel and the integrality of observer's obtaining information, the weight of display system and diopter correction all have a great impact for the comfort level of wearer and the sharpness of image simultaneously.
Dress display optical system due to the contradiction of optical imaging system weight and visual field and diopter and extremely observe to solve tradition the series of problems brought, the profile of tooth that the present invention devises a kind of diopter correction inlays planar waveguide optical device.
Summary of the invention
In order to solve the problem, the profile of tooth that the invention provides a kind of diopter correction inlays planar waveguide optical device.
In order to achieve the above object, present invention employs following technical scheme:
The profile of tooth of diopter correction inlays a planar waveguide optical device, it is characterized in that: comprise successively: display light source, sends the display light wave of display required image; Collimation lens, collimates the light wave that light source sends; Coupling-in face, is coupled into slab guide by collimated light waves; Slab guide substrate, carries out reflections propagate to the light wave be coupled into and forms total reflection light wave; Micro-tooth-shape structure, carries out coupling output to total reflection light wave; Thin negative lens, corrects diopter.Wherein, collimation lens is arranged between display light source and slab guide substrate, micro-tooth-shape structure is arranged on slab guide substrate away from the one end side of display light source, micro-tooth-shape structure is connected by the miniature little tooth of some and forms, and these miniature little teeth carry out coupling output to the total reflection light wave propagated in slab guide substrate.The present invention mainly adopts the reflection of micro-toothed surface, total reflection and negative lens diopter correction principle and coating technique to realize.Light from display light source incides coupling-in face after the collimation lens collimation that aberration correction is good, enter into slab guide substrate through reflection, make light with the condition of satisfied total reflection loss-free position being transferred to required display translation in slab guide substrate.Due to the existence of micro-tooth-shape structure, break the total reflection propagation conditions of light in slab guide, through the reflection of micro-profile of tooth flank of tooth, made to enter into ultra-thin negative lens outside light wave coupling output to micro-tooth-shape structure.Through the diopter correction of ultra-thin negative lens, light enters into the visual field of observer.For the light from surrounding scenes, the reflection through waveguide upper and lower surface directly enters into human eye, thus completes the Real Time Observation of image information and surrounding scenes information.
In planar waveguide optical device provided by the invention, also have such feature: collimation lens adopts single aspheric mirror, the surface working of each miniature little tooth of micro-tooth-shape structure is to minute surface (surfaceness R
athe wavelength dimension of imaging should be less than, as 10-20nm) effect, micro-tooth-shape structure and plane wave conductive substrate adopt suitable optical glue to bond, as the ultraviolet glue of index matching.
In planar waveguide optical device provided by the invention, also there is such feature: correct thin negative lens consistent with the material of slab guide substrate and micro-tooth-shape structure, form by optical material, this material has suitable refractive index, transmitance and mechanical property, as PMMA.
In planar waveguide optical device provided by the invention, also have such feature: coupling-in face is coated with anti-reflection film, the method for the lower surface dichroic spin coating of micro-tooth-shape structure is coated with optical thin film, and the beam projecting face of thin negative lens is coated with anti-reflection film.
In planar waveguide optical device provided by the invention, also there is such feature: wherein, coupling-in face drift angle to the physical length L ray of micro-tooth-shape structure near coupling-in face position and slab guide substrate thickness Hp and be totally reflected the angle α of light wave and substrate lower surface
surbetween meet following relation: Lray >3 Hp*tan (α
sur).
In planar waveguide optical device provided by the invention, also there is such feature: wherein, the entire length Lt of micro-tooth-shape structure and the thickness Hp of slab guide substrate and be totally reflected the angle α of light wave and substrate lower surface
surbetween meet following relation: Lt > 2 Hp*tan (α
sur).
In planar waveguide optical device provided by the invention, also have such feature: wherein, in micro-tooth-shape structure, the width Tw of single micro-tooth should be greater than the length of imaging light wavelength, as 600um, to avoid because micro-tooth-shape structure causes strong diffraction effect, and affect imaging effect.
Compared with existing imaging system, the invention has the beneficial effects as follows: diopter correction is convenient, lightweight, compact conformation, processing technology simple, visual field increases flexibly and light wave coupling efficiency is high.These advantages make optical device of the present invention compared to traditional 45o reflective display system, and the volume and weight of system is reduced.Under identical volume, the imaging viewing field of optical system of the present invention is larger, light wave coupling efficiency is higher, manufacturing process is more simple, cost is lower, the present invention is simultaneously simple compared to traditional imaging system diopter correction, greatly solves the inconvenience that the abnormal eye-observation of diopter brings.
Accompanying drawing explanation
Fig. 1 is the structural representation that the profile of tooth of diopter correction of the present invention inlays planar waveguide optical device;
Fig. 2 is the light schematic diagram inlaying plane waveguiding device without the profile of tooth of diopter correction;
Fig. 3 is that the profile of tooth of diopter correction of the present invention inlays the micro-tooth-shape structure schematic diagram of planar waveguide optical device;
Fig. 4 is the light schematic diagram that the profile of tooth of diopter correction of the present invention inlays planar waveguide optical device;
Fig. 5 is the light schematic diagram that the profile of tooth of diopter correction of the present invention inlays in planar waveguide optical device after micro-tooth-shape structure lower surface plated film;
Fig. 6 is that the profile of tooth of diopter correction of the present invention inlays transmissivity in planar waveguide optical device with the curve map of incident angle change of light arriving micro-tooth-shape structure;
The transmittance graph figure of Fig. 7 is incident angle that the profile of tooth of diopter correction of the present invention inlays the light arriving micro-tooth-shape structure in planar waveguide optical device when being 10 ° each wavelength;
The transmittance graph figure of Fig. 8 is incident angle that the profile of tooth of diopter correction of the present invention inlays the light arriving micro-tooth-shape structure in planar waveguide optical device when being 60 ° each wavelength;
Fig. 9 is the schematic diagram that the profile of tooth of diopter correction of the present invention inlays that in planar waveguide optical device, light is propagated in micro-tooth-shape structure and thin negative lens;
Figure 10 be the profile of tooth of diopter correction of the present invention inlay thin negative lens in planar waveguide optical device beam projecting face plating anti-reflection film before and after transmittance graph;
Figure 11 is that the profile of tooth of diopter correction of the present invention inlays planar waveguide optical device eye-observation schematic diagram; And
Figure 12 is that the profile of tooth of diopter correction of the present invention inlays the simple eye application schematic diagram of planar waveguide optical device.
Embodiment
Below in conjunction with accompanying drawing, specific works engineering of the present invention is described.
Fig. 1 is the structural representation that the profile of tooth of diopter correction of the present invention inlays planar waveguide optical device, and as shown in Figure 1, the system composition of optical device of the present invention comprises: display light source 10, collimation lens 11, coupling-in face 12, slab guide substrate 13, micro-tooth-shape structure 14, thin negative lens 15.The basic structure of optical device of the present invention is made up of six parts, can expand accordingly for embody rule to each ingredient of the present invention, thus further raising system is in the potentiality of application aspect.Corresponding explanation is given in effect below for the present invention's six parts:
Display light source 10 is wearing in display application system the image information mainly provided for observing.And the display light source of main flow has DLP, LCD, OLED, Lcos etc. at present.Different display techniques corresponds to different display requirements.On volume, be tending towards microminiaturized in order to the one-piece construction of display system can be made, and consider the homogeneity of light source each point brightness, export the factor such as restriction of light efficiency and brightness requirement and resolution and size, the light source that usual selection volume is suitable, brightness uniformity, resolution are high as the display light source of micro display system, as Lcos.In order to meet the requirement such as optical design and Film Design, usually understand with polaroid before display light source, for changing the polarization state of the light wave from display system.But this weakens greatly by the overall light efficiency causing entering waveguide display systems.But, the light efficiency of liquid crystal on silicon Lcos be enough to meet apply requirement accordingly.Can select CF-Lcos or CS-Lcos according to concrete requirement for liquid crystal on silicon Lcos, mainly there is marked difference in both in resolution.With the resolution of the CS-Lcos of size usually above CF-Lcos.
Accurate word lens 11 mainly collimate the light wave that display light source sends.Wearing in display application, human eye, as final image information receiver, needs to collimate to reach the actual requirement that human eye freely loosens viewing to the light wave from image.General employing optical spherical lens collimates light wave, but due to the existence of optical aberration, image also exists the aberrations such as astigmatism, distortion, the curvature of field, coma after lens, collimation lens is needed to require to carry out strict aberration correction according to application for this reason, to reaching desirable imaging effect, otherwise the final resolution of optical system will be affected, make human eye cannot clearly watch real image information.Because common spherical mirror is when correcting aberration, the lens combination needing different materials and radius-of-curvature forms, and this can make the weight and volume of whole system increase.Therefore usually adopt aspheric mirror to complete the rectification of aberration, due to when correcting aberration, single aspheric mirror can realize, thus the one-piece construction of the system of giving and weight bring benefit.
Coupling-in face 12 adopts the principle of mirror-reflection to utilize prism to change the direction of propagation of light.Carry out the light of self-focus lens 11 after coupling-in face 12, the reflection through coupling-in face 12 enters into planar substrate.Owing to adopting inclined-plane coupling light wave to enter substrate, can effectively avoid reflection ray on the impact of original image picture element.Generally for the coupling input efficiency improving light wave further, corresponding anti-reflection film can be plated within the scope of effective clear aperture of coupling-in face 12, improve the coupling input energy of light wave.
The rapidoprint of slab guide substrate 13 has a variety of, and as glass material JGS1, JGS2, K9, BK7 etc., plastic material has PET, PMMA etc.Due to refractive index, the abbe number difference of often kind of material, cause the transmitance of the cirtical angle of total reflection, material, absorb absorption coefficient and vary in weight.Consider the restriction of practical application condition, need to select according to specific requirement.The condition of demand fulfillment total reflection when light wave is propagated in the substrate, to ensure that light does not reflect substrate.The absorption of material to light-wave energy itself should be reduced as far as possible simultaneously, otherwise a large amount of light-wave energies can be made to lose and the visibility of effect diagram picture in transmitting procedure.Planar substrate material itself limits the scope of the image transmitted in the substrate and the brightness of image in addition, in order to expand the scope of transmitting image, usually plate the rete of certain reflectivity at substrate surface according to demand, give certain expansion to the angle of total reflection of material.For this reason, the optical material possessing appropriate index, transmitance and mechanical property selected usually by the material of slab guide substrate, as plastics acrylic PMMA.And plastics acrylic PMMA(n
d=1.49) the cirtical angle of total reflection is 42.2o, higher than general K9 glass (n
d=1.52) cirtical angle of total reflection 41.8o, the in addition lighter in weight of PMMA, for K9 glass and the PMMA plastics of equal volume, the weight of PMMA is the half of K9 glass, and this advantage can be used for alleviating the weight of dressing display application equipment.
The total reflection condition that micro-tooth-shape structure 14 is used for destroying light makes its coupling output to outside tooth-shape structure.Light wave enters into micro-tooth-shape structure 14 through the transmission of slab guide substrate 13, because micro-tooth-shape structure 14 and plane wave conductive substrate 13 adopt suitable optical glue to bond, as the ultraviolet glue of index matching, thus light can be made not have deviation ground directly to arrive in micro-tooth-shape structure 14.Through the reflection of micro-tooth-shape structure 14 flank of tooth, the total reflection condition destroying light makes coupling light export and enters human eye.The reflection that the existence of tooth-shape structure can make whole toothed surfaces all realize light, because light can cover integral surface, thus achieves the expansion of observer visual field.But this visual field expansion tooth-shape structure is easy to realize tooth-shape structure surface working in processes to be needed to reach minute surface (surfaceness R
athe wavelength dimension of imaging should be less than, as 10-20nm) effect, otherwise the sharpness of image can be made to reduce due to irreflexive existence.Usual tooth-shape structure adopts the way such as injection moulding, diamond cut to realize, and the corresponding surfaceness of these processing technologys can meet the demands.
Thin negative lens 15 is used for correcting diopter.For the human eye of diopter exception, dioptric rectification must be considered, otherwise information final for impact is observed.The design of thin negative lens 15 must consider the refractive index of material and the dioptric optical value for the abnormal human eye of slight diopter.Conveniently thin negative lens 15 glues together with micro-tooth-shape structure 14, and the material of usual thin negative lens and plane wave conductive substrate and micro-tooth-shape structure should be consistent on choosing.The high angle scattered light inciding micro-tooth-shape structure lower surface should be totally reflected and enter into slab guide substrate relaying and resume and broadcast, but owing to being by suitable optical glue between thin negative lens and micro-tooth-shape structure, ultraviolet glue as index matching carries out gluing together, the high angle scattered light entering micro-tooth-shape structure may directly be entered in thin negative lens, and this will cause the existence of secondary imaging.In order to eliminate the impact of secondary imaging on original image, and in order to make the low-angle light inciding micro-tooth-shape structure lower surface enter into thin negative lens completely, between micro-tooth-shape structure and thin negative lens, introduce optical thin film.
The job step of optical device of the present invention and exemplary application:
Fig. 2 is the light schematic diagram inlaying plane waveguiding device without the profile of tooth of diopter correction.Collimated ray 20 from display light source impinges perpendicularly on coupling-in face, thus changes the direction of propagation of light, makes it in slab guide substrate, be totally reflected propagation.Through reflecting surface Ref
-surfreflection, the lower surface Sur of the first and plane wave conductive substrate of light 20
-bottomcollision, by substrate lower surface Sur
-bottomreflection, light 20 and then with the upper surface Sur of slab guide substrate
-upcollision.The angle α of light 20 and plane wave conductive substrate normal must be remained in whole light transmition process
surbe greater than backing material (PMMA, n
d=1.49) the cirtical angle of total reflection (42.2o), otherwise light-wave energy very easily loses in communication process, causes the loss of final displays image information, and the field range of image is observed in impact.In order to realize the light path path of above-mentioned light transmition, take axial principal ray as design reference, the condition that each parameter need meet is:
α
Sur-ref=β
Wherein, β is reflecting surface Ref
-surfwith substrate lower surface Sur
-bottomangle, α
sur-refaxial principal ray and reflecting surface Ref
-surfthe angle of normal.
α
Sur= 2α
Sur-ref
Wherein, α
surchief ray and plane wave conductive substrate lower surface Sur
-upthe angle of normal.When meeting above-mentioned condition, axial principal ray can the propagation in the substrate of noenergy loss, for the light beam in other direction, as long as and the reflection angle of substrate lower surface be greater than the transmission that critical angle can can't harm.
Fig. 3 is that the profile of tooth of diopter correction of the present invention inlays the micro-tooth-shape structure schematic diagram of planar waveguide optical device.Micro-tooth-shape structure 31 is made up of the miniature little tooth 32 of some, and these miniature little teeth make its coupling output to outside substrate for breaking light at the total reflection condition of substrate surface.From substrate light 33 first with the Sur of profile of tooth microstructure 31
-inputface collides, and vertical refraction enters in micro-tooth-shape structure.Enter light 33 after micro-tooth-shape structure and then with the Sur of profile of tooth microstructure 31
-outputface collides, through Sur
-outputbe coupled after the reflection in face to output to outside micro-tooth-shape structure and enter within field of view scope.For light 34, first with the Sur of profile of tooth microstructure 31
-inputthe face vertical refraction that collides enters in micro-tooth-shape structure.Enter light 34 after micro-tooth-shape structure and then with the Sur of profile of tooth microstructure 31
-outputface collides, again through Sur
-outputthe refraction in face and Sur
-inputface collides, by Sur
-inputface refraction enters profile of tooth microstructure 31.Then with the Sub of micro-tooth-shape structure 31
-bottomface collides, due to light and Sub
-bottomthe normal angle in face is greater than the cirtical angle of total reflection, thus light continues to propagate in profile of tooth microstructure 31.Meet above-mentioned condition when propagating in micro-tooth-shape structure to make light, take axial principal ray as structural parameters reference design light, each parameter of tooth-shape structure meets following relation:
β
t-1=β
t-2=β
t-3=α
Sur
Wherein, β
t-1the Sur of micro-tooth-shape structure 31
-inputthe angle of face and surface level, β
t-2the Sur of micro-tooth-shape structure 31
-outputface and Sur
-inputthe angle in face, β
t-3the Sur of micro-tooth-shape structure 31
-outputthe angle of face and surface level.
β
ref-t= β
t-2
Wherein, β
ref-tthe Sur of axial principal ray and micro-tooth-shape structure 31
-inputthe angle of face normal.
β
surf-t= β
ref-t
Wherein, β
surf-tthe Sub of chief ray and micro-tooth-shape structure 31
-bottomthe angle of face normal.
β
bottom= β
surf-t
Wherein, β
bottomthe Sub of micro-tooth-shape structure 31
-bottomface and Sur
-outputthe angle in face.
For above-mentioned micro-tooth-shape structure parameter, all with key light axis for determining with reference to carrying out light path parameter, during light transmission for off-axis point, because the off-axis angle of micro-display off-axis point light beam is general very little, therefore, above-mentioned parameter relation is enough to meet corresponding axle outer light beam propagation conditions.
Fig. 4 is the light schematic diagram that the profile of tooth of diopter correction of the present invention inlays planar waveguide optical device.Be positioned at the light wave sent from the pointolite Q of display light source on optical axis 40 after collimation lens collimation, first there is reflection and refraction with coupling-in face collision in collimated ray 41, wherein continuation is propagated by refracted ray in slab guide.And because coupling-in face is to the existence of light reflection effect, the energy of light wave is lost, usually can plate the anti-reflection film of certain optical thickness on coupling-in face, for improving the light-wave energy entered in slab guide substrate.Refracted ray enters into micro-tooth-shape structure propagate certain optical path with the form of total reflection in slab guide substrate after, break the condition that light total reflection is propagated, it is made to be coupled in thin negative lens, through the diopter correction of thin negative lens, light finally enters into the visual field of observer.
Fig. 5 is the light schematic diagram that the profile of tooth of diopter correction of the present invention inlays in planar waveguide optical device after micro-tooth-shape structure lower surface plated film.Collimated ray from light source impinges perpendicularly on coupling-in face, and coupling-in face is similar to the aperture diaphragm in centered optical system, limits the size of the light beam entered in slab guide substrate, namely limits the beam energy entering substrate.Usually, the energy of 4% is had to be lost due to the reflection of substrate surface when light vertically enters substrate.These folded light beams cause the loss of general image energy on the one hand, also create secondary imaging on the other hand, have impact on the sharpness of original image.Corresponding anti-reflection film plates, for increasing the energy of incident light wave in the usual useful area place at coupling-in face for this reason.Enter the collimated light beam of slab guide substrate through reflection, propagate with the form of satisfied total reflection in slab guide substrate, arrive micro-tooth-shape structure after certain light path, the total reflection condition that light beam has been broken in the existence of tooth-shape structure makes its coupling output in the visual field of observer.Light 50 is through the reflection of the little flank of tooth of micro-tooth-shape structure, and the lower surface outgoing of the vertical micro-tooth-shape structure of a part of light 52, a part of light 51 continues to propagate, and contacts with the lower surface of tooth-shape structure with wide-angle.In order to carry out diopter correction, must ensure that the light 51 of large angle incidence again can return substrate relaying and resume and broadcast, otherwise ghost image is appearred in the image causing observing.In addition, the light 52 contacted with micro-tooth-shape structure lower surface with low-angle should all outgoing, otherwise the contrast of display image can reduce.These objects mainly rely on optical thin film 53 to realize.
Fig. 6 is that the profile of tooth of diopter correction of the present invention inlays transmissivity in planar waveguide optical device with the curve map of incident angle change of light arriving micro-tooth-shape structure.In order to the light realizing the said large angle incidence of above-mentioned Fig. 5 returns substrate completely, simultaneously low-angle light can outgoing tooth-shape structure lower surface completely, needs to adopt the mode of dichroic spin coating optical thin film to realize at the lower surface of micro-tooth-shape structure.Be illustrated in figure 6 the curve that S polarization light reflectance changes with the angle inciding micro-tooth-shape structure, it can thus be appreciated that, for the S polarized light that wavelength is 510nm, when incident angle is 0 ° ~ 20 °, transmissivity T > 99%, therefore low-angle light almost can shine the lower surface of tooth-shape structure completely.When incident angle is 50 ° ~ 90 °, transmissivity T <0.01%, thus the light of large angle incidence almost all turns back to planar substrate relaying and resumes and broadcast, for remaining more 0.01% light-wave energy, human eye cannot perception, therefore can not impact the observation of original image.
The transmittance graph figure of Fig. 7 is incident angle that the profile of tooth of diopter correction of the present invention inlays the light arriving micro-tooth-shape structure in planar waveguide optical device when being 10 ° each wavelength.Light is penetrated for the low-angle people described in Fig. 5, the reflectance curve of all low-angles in whole wavelength coverage must be investigated.If the field angle of image light waves in waveguide is ± ω o, then must ensure that the reflectance value within the scope of all wavelengths of the arbitrarily angled correspondence of 0o ~ ω o all must be less than certain value, and this value must keep almost constant, otherwise reflection ray can impact original image, and the final display color of image will be lost, the saturation degree of effect diagram picture.As shown in Figure 7, when the incident angle of the light arriving micro-tooth-shape structure is 10 °, the transmissivity T of all light of wavelength coverage in 430 ~ 680nm all meets T > 99%, thus meets corresponding designing requirement.
The transmittance graph figure of Fig. 8 is incident angle that the profile of tooth of diopter correction of the present invention inlays the light arriving micro-tooth-shape structure in planar waveguide optical device when being 60 ° each wavelength.For the large angle incidence light described in Fig. 5, must ensure all to turn back to substrate relaying and resume and broadcast, otherwise reflect and will cause secondary imaging into the light in thin negative lens.Because the original direction of low-angle light is different with the direction of the light of secondary imaging, ghost image will be had and occur, thus affect original image as qualitative observation.If the field angle of image light waves in waveguide is ± ω o, then α must be ensured
surreflectivity within the scope of all wavelengths that ± ω o is corresponding all must be greater than certain value, and this value must ensure the impact of original image imaging very little.As shown in Figure 8, when incident angle is 60 °, the transmissivity of all light of wavelength coverage in 430 ~ 680nm is all very little.In Fig. 8 A, the scope of ordinate transmissivity is 0 ~ 100%, can find out that transmissivity is now almost 0%.In Fig. 8 B, the scope of ordinate transmissivity is 0 ~ 1%, when can more significantly see that incident angle is 60 °, the transmissivity T of all light of wavelength coverage in 430 ~ 680nm meets T <0.01%, and these energy are on the impact of original image, negligible.
Fig. 9 is the schematic diagram that the profile of tooth of diopter correction of the present invention inlays that in planar waveguide optical device, light is propagated in micro-tooth-shape structure and thin negative lens.Light 90 from slab guide substrate incides in micro-tooth-shape structure, and through the reflection of miniature little tooth, low-angle light 91 enters into thin negative lens, and high angle scattered light 92 then resumes and broadcasts being reflected to substrate relaying, avoids secondary imaging.Micro-tooth-shape structure and thin negative lens adopt suitable optical glue usually, ultraviolet glue as mated with refractive index of substrate is glued together, because refractive index do not mate the inefficacy that can cause optical thin film 93, cannot ensure that the light-wave energy of wide-angle is all reflected back in substrate.After light 91 enters into thin negative lens, and then will be refracted in air.When light is from optically denser medium to optically thinner medium, incident angle is within the scope of 0 ~ 30o, and the transmissivity of light wave is generally 95%, and the light-wave energy of remaining 5% will be reflected back toward in optically denser medium.The picture that this reflecting light of 5% becomes can cause serious interference to original image, and the usual increasing plated film certain at the beam projecting face evaporation of thin negative lens, reduces the impact of reflection ray for this reason.
Figure 10 be the profile of tooth of diopter correction of the present invention inlay thin negative lens in planar waveguide optical device beam projecting face plating anti-reflection film before and after transmittance graph.When incident angle is 20 °, be the transmittance graph during beam projecting face non-anti-reflection coated of thin negative lens as shown in Figure 10 A, the transmissivity can seeing all light of wavelength coverage in 430 ~ 680nm is T=95%, and the energy of remaining 5% will turn back to substrate relaying and resume and broadcast.When these light again reflect enter into thin negative lens time, will secondary imaging be caused.Be the transmittance graph during beam projecting face plating anti-reflection film of thin negative lens as shown in Figure 10 B, can see that the transmissivity of all light in whole wavelength coverage is T>99%, the remaining light-wave energy less than 1% is very little on the impact of human eye, negligible.
Figure 11 is that the profile of tooth of diopter correction of the present invention inlays planar waveguide optical device eye-observation schematic diagram.The light wave that on display light source axle, 1 S sends enters into coupling-in face through the collimation of collimation lens, total reflection propagation is carried out through being reflected in slab guide substrate of input face, in the micro-tooth-shape structure of final arrival, by the effect of micro-tooth-shape structure and thin negative lens, finally enter into the observer visual field.In order to the principle of work of device is better described, give quantitative explanation with concrete device instance parameter.In planar wave design, be the determination that reference ray carries out relevant parameter with axial principal ray usually, physical relationship is as follows:
Hp= 4.0mm
Wherein, Hp is the slab guide substrate thickness of optical device of the present invention.The rapidoprint of this device is based on PMMA.PMMA material has the little huge advantage of density, considers the observation visual field in order to expand observer, and the thickness of device and the length of micro-tooth-shape structure should have certain requirement.Slab guide thickness too young pathbreaker causes light primary event cannot complete the expansion of visual field, increases the difficulty of processing technology simultaneously.The length of micro-tooth-shape structure is too short on the other hand, the quantity of miniature little tooth must be caused to reduce, these two aspects, all by the complexity of the coupling output and technique that affect light, must be taken into account weight and a coupling light for the thickness of device for this reason and export and design.
β = 30o
Wherein, β is reflecting surface Ref
-surfwith substrate lower surface Sur
-bottomangle, after considering that axial principal ray vertical incidence enters substrate, through reflecting surface Ref
-surfreflection after, probably through substrate ground Sur
-bottomreflection after again with reflecting surface Ref
-surfmeet, therefore above-mentioned parameter value can avoid the secondary of light to meet.
α
Sur= 2β= 60o
Wherein, α
suraxial principal ray and substrate top surface Sur
-upthe angle of normal.For α
surmust ensure the cirtical angle of total reflection of the substrate being greater than slab guide material, otherwise the refraction due to light is caused a large amount of losses by the information of image.The PMMA material cirtical angle of total reflection is 42.2o, α
sur=60o > 42.2o meets design requirement.
Lray = 32.7 mm
Wherein, Lray is coupling-in face drift angle to the physical length of micro-tooth-shape structure near coupling-in face position, in order to avoid parasitic light is on the impact of image quality, the general length by increasing Lray, makes parasitic light in communication process because reflection angle is less than critical angle and coupling output to outside substrate.General Requirements:
Lray >3 Hp*tan(α
Sur)
Angle parameter for micro-tooth-shape structure can be determined by the parameter of planar waveguiding structure accordingly:
β
t-1= β
t-2= β
t-3 = α
Sur= 60o
β
ref-t= β
t-2= 60o
β
surf-t= β
ref-t= 60o
β
bottom= β
surf-t= 60o
Ht = 0.87mm
Lt = 20.5mm
Tw = 0.8mm
Wherein, Ht is the integral thickness of tooth-shape structure, after entering substrate to make light, can also be continued propagation after toothed surface reflection returns in planar substrate, usually between miniature little tooth and the bottom surface of micro-tooth-shape structure, keep certain thickness, but thickness is unnecessary too greatly otherwise easily cause the increase of tooth-shape structure overall volume.Lt is the entire length of micro-tooth-shape structure, and Lt length is determined usually to determine according to axial principal ray primary event, namely requires:
Lt > 2 Hp*tan(α
Sur )
Tw is the width of micro-tooth-shape structure, the numerical value of Tw can not be too too little, otherwise will the diffraction effect of light wave be there is, destroy the basic demand of geometrical optics design, in order to avoid the appearance of above-mentioned phenomenon, the selected value of usual Tw should be greater than the wavelength dimension of imaging, as 600um, to avoid because micro-tooth-shape structure causes strong diffraction effect, and affect imaging effect.
For choosing of thin negative lens, to lateral dimension be considered on the one hand, need to consider dioptric numerical value on the other hand, because thin negative lens needs and micro-tooth-shape structure gummed, therefore:
L-W = Lt = 20.5mm
F=200 degree
Wherein, L-W is the transverse width of thin negative lens, and F is the dioptric optical value of thin negative lens.
Lateral length profile of tooth of the present invention being inlayed to planar waveguide optical device can be chosen according to corresponding application, does not have fixing ratio.Moreover lateral dimension can not have any impact for optical design.Choosing of above-mentioned parameter designs based on axial principal ray and chooses, and the light for other angle incidence also meets corresponding requirement.
Figure 12 is that the profile of tooth of diopter correction of the present invention inlays the simple eye application schematic diagram of planar waveguide optical device.Wherein 120 is display controller, and 121 is the connecting line connecting display controller and display light source, and 122 is the mirror holder carrying display light source and collimation lens, 123 is display light source, and 124 is collimation lens, and 125 is slab guide substrate, 126 is micro-tooth-shape structure, and 117 is the thin negative lens of diopter correction.Its groundwork process is: display controller 120 sends corresponding display information, by the form of light wave, Information Communication is gone out after display light source 123 receives display information, by collimating the collimation of transparent 124, light wave is coupled in slab guide substrate 125, light wave is transferred to the position at micro-tooth-shape structure 126 place in slab guide substrate, be coupled in thin negative lens 127 and carry out diopter correction, be and then refracted in the visual field of observer.Wearable display is used for by assembly of the present invention, viewing in real time can be realized on the one hand and need the pictorial information of display, on the other hand because assembly of the present invention does not adopt special diaphragm to stop entering of external scene light completely, the change of outside scenery therefore can also be observed.Waveguide device can be added respectively on the two sides of common spectacles frame according to concrete requirement in addition, show for 3D.Because the present invention have chosen the less PMMA optical plastic of density, when therefore dressing display for eyes, in weight, uncomfortable sensation can not be caused to wearer.
Embodiment effect and effect:
The profile of tooth of the diopter correction that the present embodiment provides is inlayed in planar waveguide optical device and is utilized the mode of dichroic spin coating to be coated with optical thin film at the lower surface of micro-tooth-shape structure, make the light of large angle incidence can return substrate completely on the one hand, make again on the other hand low-angle light can outgoing tooth-shape structure lower surface completely, avoid observation image and occur ghost image, turn improve the contrast of image simultaneously.
The profile of tooth of the diopter correction that the present embodiment provides is inlayed in planar waveguide optical device and is coated with anti-reflection film in the beam projecting face of correcting thin negative lens, avoids secondary imaging, ensure that final sharpness of observing image.
The profile of tooth of the diopter correction that the present embodiment provides inlays the PMMA optical plastic that planar waveguide optical device midplane optical waveguide substrates, micro-tooth-shape structure and thin negative lens all adopt density less, make the lighter weight of whole system, add comfort level when wearer uses.
The profile of tooth of the diopter correction that the present embodiment provides is inlayed in planar waveguide optical device and is not adopted special diaphragm to stop entering of external scene light completely, therefore, the efficient coupling that the present embodiment provides, the profile of tooth of compact conformation inlay planar waveguide optical device when being incorporated in wearable display, not only can watch the pictorial information needing display in real time, the change of outside scenery can also be observed.
Claims (7)
1. the profile of tooth of diopter correction inlays a planar waveguide optical device, comprises successively:
Display light source, for sending the display light wave of display required image;
Collimation lens, collimates the light wave that display light source sends;
Coupling-in face, is coupled into slab guide by collimated light waves;
Slab guide substrate, carries out reflections propagate to the light wave be coupled into and forms total reflection light wave;
Micro-tooth-shape structure, carries out coupling output to total reflection light wave;
Thin negative lens, corrects diopter,
Wherein, collimation lens is arranged between display light source and slab guide substrate, and micro-tooth-shape structure is arranged on plane wave guide bush
The end away from the one end side of display light source, slab guide substrate and adopt suitable optical glue to glue together between micro-tooth-shape structure and thin negative lens respectively.
2. optical device according to claim 1, is characterized in that:
Collimation lens adopts single aspheric mirror, and the surface working of each little miniature little tooth of micro-tooth-shape structure is to the effect of minute surface (surface roughness Ra is less than the wavelength dimension of imaging).
3. optical device according to claim 1, is characterized in that:
Correct thin negative lens consistent with the material of slab guide substrate and micro-tooth-shape structure, form by optical material, this material has suitable refractive index, transmitance and mechanical property.
4. optical device according to claim 1, is characterized in that:
Coupling-in face is coated with anti-reflection film, and the method for the lower surface dichroic spin coating of micro-tooth-shape structure is coated with optical thin film, and the beam projecting face of thin negative lens is coated with anti-reflection film.
5. optical device according to claim 1, is characterized in that:
Wherein, coupling-in face drift angle to the physical length L ray of micro-tooth-shape structure near coupling-in face position and slab guide substrate thickness Hp and be totally reflected the angle α of light wave and substrate lower surface
surbetween meet following relation:
Lray >3 Hp*tan(α
Sur)。
6. optical device according to claim 1, is characterized in that:
Wherein, the entire length Lt of micro-tooth-shape structure and the thickness Hp of slab guide substrate and be totally reflected light wave and substrate lower surface angle α
surbetween meet following relation:
Lt > 2 Hp*tan(α
Sur )。
7. optical device according to claim 1, is characterized in that:
Wherein, the width Tw of single micro-tooth of micro-tooth-shape structure should be greater than the wavelength length of imaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036544.8A CN104678555B (en) | 2015-01-24 | 2015-01-24 | The tooth form of diopter correction inlays planar waveguide optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036544.8A CN104678555B (en) | 2015-01-24 | 2015-01-24 | The tooth form of diopter correction inlays planar waveguide optical device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104678555A true CN104678555A (en) | 2015-06-03 |
| CN104678555B CN104678555B (en) | 2017-12-08 |
Family
ID=53313852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510036544.8A Active CN104678555B (en) | 2015-01-24 | 2015-01-24 | The tooth form of diopter correction inlays planar waveguide optical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104678555B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259606A (en) * | 2015-09-10 | 2016-01-20 | 上海理鑫光学科技有限公司 | Eyeglass used for large visual field angle imaging |
| CN105259656A (en) * | 2015-09-10 | 2016-01-20 | 上海理鑫光学科技有限公司 | Augmented reality glasses with diopter glasses effect |
| CN105954876A (en) * | 2016-07-04 | 2016-09-21 | 北京理工大学 | Large-view-field near-to-eye display eyepiece system |
| CN107272210A (en) * | 2017-08-14 | 2017-10-20 | 上海理湃光晶技术有限公司 | A kind of waveguide that can improve visual experience shows structure |
| CN107561633A (en) * | 2017-10-23 | 2018-01-09 | 南京理湃光电技术有限公司 | A kind of tooth form planar waveguide optical device of high coupling efficiency |
| CN108089254A (en) * | 2018-01-17 | 2018-05-29 | 上海渺视光学科技有限公司 | Augmented reality planar waveguide optical device with micro-structure |
| CN108292048A (en) * | 2015-12-01 | 2018-07-17 | 微软技术许可有限责任公司 | The expansion visual field in the near-eye display using wide range imager |
| CN108490756A (en) * | 2018-03-01 | 2018-09-04 | 北京理工大学 | A kind of holographic display device based on waveguide transmission |
| CN108780227A (en) * | 2016-03-18 | 2018-11-09 | 图茨技术股份有限公司 | Eyeglass and augmented reality glasses for optical image unit |
| CN109445109A (en) * | 2018-12-26 | 2019-03-08 | 深圳珑璟光电技术有限公司 | A kind of light-transmitting plate |
| JP2020501185A (en) * | 2016-11-30 | 2020-01-16 | マジック リープ， インコーポレイテッドＭａｇｉｃ Ｌｅａｐ，Ｉｎｃ． | Method and system for high resolution digitized display |
| CN112305758A (en) * | 2019-08-01 | 2021-02-02 | 苏州苏大维格科技集团股份有限公司 | AR shows glasses |
| CN114236682A (en) * | 2022-01-20 | 2022-03-25 | 上海理湃光晶技术有限公司 | Optical expansion waveguide |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1774661A (en) * | 2004-03-29 | 2006-05-17 | 索尼株式会社 | Optical device and virtual image display device |
| US20070091445A1 (en) * | 2003-09-10 | 2007-04-26 | Yaakov Amitai | Substrate-guided optical devices |
| EP2071382A1 (en) * | 2007-12-11 | 2009-06-17 | Wings Aktiebolag | Optical arrangement for coupling two different image sources comprising a diffractive optical beam guide |
| CN101963703A (en) * | 2009-07-22 | 2011-02-02 | 索尼公司 | Image display device and optical devices |
| US20120127577A1 (en) * | 2009-07-31 | 2012-05-24 | Horiba Jobin Yvon Sas | Planar optical system for wide field-of-view polychromatic imaging |
| US8189263B1 (en) * | 2011-04-01 | 2012-05-29 | Google Inc. | Image waveguide with mirror arrays |
| CN102495470A (en) * | 2011-11-11 | 2012-06-13 | 连城 | Waveguide-based perspective display device and spectacle-type micro projection system |
| CN103309035A (en) * | 2012-03-14 | 2013-09-18 | 索尼公司 | Image display device and image generating device |
| CN103424803A (en) * | 2013-08-16 | 2013-12-04 | 上海理工大学 | Optical waveguide device system |
| CN103513423A (en) * | 2013-09-27 | 2014-01-15 | 上海理工大学 | Perspective display device |
| CN103513424A (en) * | 2013-09-27 | 2014-01-15 | 上海理工大学 | Perspective display device |
| CN103513422A (en) * | 2013-09-27 | 2014-01-15 | 上海理工大学 | Perspective display device |
| CN104216120A (en) * | 2014-08-29 | 2014-12-17 | 中国科学院长春光学精密机械与物理研究所 | Semitransparent film array flat-panel waveguide type head-mounted display optical system |
-
2015
- 2015-01-24 CN CN201510036544.8A patent/CN104678555B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070091445A1 (en) * | 2003-09-10 | 2007-04-26 | Yaakov Amitai | Substrate-guided optical devices |
| CN1774661A (en) * | 2004-03-29 | 2006-05-17 | 索尼株式会社 | Optical device and virtual image display device |
| EP2071382A1 (en) * | 2007-12-11 | 2009-06-17 | Wings Aktiebolag | Optical arrangement for coupling two different image sources comprising a diffractive optical beam guide |
| CN101963703A (en) * | 2009-07-22 | 2011-02-02 | 索尼公司 | Image display device and optical devices |
| US20120127577A1 (en) * | 2009-07-31 | 2012-05-24 | Horiba Jobin Yvon Sas | Planar optical system for wide field-of-view polychromatic imaging |
| US8189263B1 (en) * | 2011-04-01 | 2012-05-29 | Google Inc. | Image waveguide with mirror arrays |
| CN102495470A (en) * | 2011-11-11 | 2012-06-13 | 连城 | Waveguide-based perspective display device and spectacle-type micro projection system |
| CN103309035A (en) * | 2012-03-14 | 2013-09-18 | 索尼公司 | Image display device and image generating device |
| CN103424803A (en) * | 2013-08-16 | 2013-12-04 | 上海理工大学 | Optical waveguide device system |
| CN103513423A (en) * | 2013-09-27 | 2014-01-15 | 上海理工大学 | Perspective display device |
| CN103513424A (en) * | 2013-09-27 | 2014-01-15 | 上海理工大学 | Perspective display device |
| CN103513422A (en) * | 2013-09-27 | 2014-01-15 | 上海理工大学 | Perspective display device |
| CN104216120A (en) * | 2014-08-29 | 2014-12-17 | 中国科学院长春光学精密机械与物理研究所 | Semitransparent film array flat-panel waveguide type head-mounted display optical system |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259606A (en) * | 2015-09-10 | 2016-01-20 | 上海理鑫光学科技有限公司 | Eyeglass used for large visual field angle imaging |
| CN105259656A (en) * | 2015-09-10 | 2016-01-20 | 上海理鑫光学科技有限公司 | Augmented reality glasses with diopter glasses effect |
| CN105259656B (en) * | 2015-09-10 | 2019-01-11 | 上海理鑫光学科技有限公司 | Augmented reality glasses with diopter eye effect |
| CN108292048B (en) * | 2015-12-01 | 2023-05-26 | 微软技术许可有限责任公司 | Extended field of view in near-eye displays using wide spectrum imagers |
| CN108292048A (en) * | 2015-12-01 | 2018-07-17 | 微软技术许可有限责任公司 | The expansion visual field in the near-eye display using wide range imager |
| CN114488537A (en) * | 2016-03-18 | 2022-05-13 | 图茨技术股份有限公司 | Eyeglass lens for optical imaging unit, and augmented reality eyeglass |
| CN108780227B (en) * | 2016-03-18 | 2022-03-08 | 图茨技术股份有限公司 | Eyeglass lens for optical imaging unit, and augmented reality eyeglass |
| US11131853B2 (en) | 2016-03-18 | 2021-09-28 | tooz technologies GmbH | Eyeglass lens for an optical imaging element, and augmented reality glasses |
| CN108780227A (en) * | 2016-03-18 | 2018-11-09 | 图茨技术股份有限公司 | Eyeglass and augmented reality glasses for optical image unit |
| CN105954876A (en) * | 2016-07-04 | 2016-09-21 | 北京理工大学 | Large-view-field near-to-eye display eyepiece system |
| US11686944B2 (en) | 2016-11-30 | 2023-06-27 | Magic Leap, Inc. | Method and system for high resolution digitized display |
| JP2020501185A (en) * | 2016-11-30 | 2020-01-16 | マジック リープ， インコーポレイテッドＭａｇｉｃ Ｌｅａｐ，Ｉｎｃ． | Method and system for high resolution digitized display |
| JP7232182B2 (en) | 2016-11-30 | 2023-03-02 | マジック リープ， インコーポレイテッド | Method and system for high resolution digitized display |
| CN107272210A (en) * | 2017-08-14 | 2017-10-20 | 上海理湃光晶技术有限公司 | A kind of waveguide that can improve visual experience shows structure |
| CN107561633A (en) * | 2017-10-23 | 2018-01-09 | 南京理湃光电技术有限公司 | A kind of tooth form planar waveguide optical device of high coupling efficiency |
| CN108089254A (en) * | 2018-01-17 | 2018-05-29 | 上海渺视光学科技有限公司 | Augmented reality planar waveguide optical device with micro-structure |
| CN108490756A (en) * | 2018-03-01 | 2018-09-04 | 北京理工大学 | A kind of holographic display device based on waveguide transmission |
| CN109445109A (en) * | 2018-12-26 | 2019-03-08 | 深圳珑璟光电技术有限公司 | A kind of light-transmitting plate |
| CN112305758A (en) * | 2019-08-01 | 2021-02-02 | 苏州苏大维格科技集团股份有限公司 | AR shows glasses |
| CN114236682B (en) * | 2022-01-20 | 2022-12-09 | 上海理湃光晶技术有限公司 | Optical expansion waveguide |
| CN114236682A (en) * | 2022-01-20 | 2022-03-25 | 上海理湃光晶技术有限公司 | Optical expansion waveguide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104678555B (en) | 2017-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104678555A (en) | Tooth-shaped embedding planar waveguide optical device for diopter correction | |
| CN104614858B (en) | Saw tooth structure plane waveguide visual optical display device for enhancing reality | |
| CN104536088A (en) | Dentiform embedded planar waveguide optical device | |
| CN104503087B (en) | Polarize guide-lighting planar waveguide optical display device | |
| CN104597602A (en) | Efficiently coupled tooth embedded slab guide optical element in compact structure | |
| CN104536138B (en) | Slab guide binocular optical display device with sawtooth sandwich | |
| EP3754407A1 (en) | Augmented reality device and optical system used therein | |
| CN104656258B (en) | The nearly optics of the eye display device of the adjustable curved surface waveguide of diopter | |
| CN105829952B (en) | Transparent eyepiece for head wearable display | |
| US6563648B2 (en) | Compact wide field of view imaging system | |
| CN104597565A (en) | Reality-augmented tooth form inlay planar waveguide optical device | |
| US10247943B1 (en) | Head up display (HUD) using a light pipe | |
| CN206906704U (en) | A kind of light and thin type virtual image forming device and use its near-eye display device | |
| CN103513424B (en) | Perspective display device | |
| US20200192088A1 (en) | Head up display (hud) using a light pipe | |
| CN205643970U (en) | Backlight unit , LCD module and virtual reality equipment | |
| CN210776039U (en) | Miniaturized short-distance optical system | |
| CN107024773A (en) | A kind of light and thin type virtual image forming device | |
| TWM596873U (en) | Optical system of miniature head-mounted display | |
| CN215117019U (en) | Optical lens group and near-to-eye display device | |
| CN211826725U (en) | Optical system of miniature head-mounted display | |
| CN113391447A (en) | Optical system of miniature head-mounted display | |
| CN206321883U (en) | The optical system of contact lenses formula and the head-mounted display for assembling the optical system | |
| CN105652447A (en) | Planar waveguide imaging device and method | |
| CN210776034U (en) | Short-distance optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |