CN103513424A - Perspective display device - Google Patents
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- CN103513424A CN103513424A CN201310454506.5A CN201310454506A CN103513424A CN 103513424 A CN103513424 A CN 103513424A CN 201310454506 A CN201310454506 A CN 201310454506A CN 103513424 A CN103513424 A CN 103513424A
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Abstract
The invention discloses a perspective display device based on plane expanding optical waveguide. The perspective display device is characterized by comprising a display light source, a collimating lens, a light wave coupling input lens, a plane waveguide substrate, a light wave coupling output lens and a light wave beam expanding set in sequence. The display light source is used for emitting image light waves needed for displaying. The collimating lens carries out collimation on the image light waves and then emits collimation light waves. The light wave coupling input lens carries out coupling on the collimation light waves and then emits coupling light waves. The plane waveguide substrate carries out reflecting transmission on the coupling light waves to form full reflecting waves. The light wave coupling output lens carries out coupling on the full reflecting waves and outputs display light waves. The light wave beam expanding set carries out plane expanding on the display waves, and accordingly images enter the view field range of a user. The whole perspective display device has the advantages of being compact in structure, small in size, light in weight, simple in manufacturing technology and large in view field, the lenses are used as light wave coupling input and output devices, coupling efficiency is high, light energy loss is low, the output images are clear, and displayed images are high in quality.
Description
Technical field
The present invention relates to a kind of display system, be specifically related to a kind of see-through display part based on planar extension optical waveguide.
Background technology
At present, the display technique such as flat pannel display, wearable demonstration, notebook demonstration relies on optical device to transmit to need the image information showing conventionally.For example, the crown is dressed display system and is relied on optical lens and prism by the virtual a distance, human eye the place ahead that is presented at of picture, do not affect human eye to the visibility prerequisite of scenery around under, can walk on browsing information limit, limit, strengthened presence.The main core optical module of this type systematic is comprised of three parts: light wave input coupling device, light wave transmissions substrate and light wave output coupling device.Although adopt conventional formation method can obtain great visual field, along with the increase of visual field, the weight and volume of optical system integral body sharply increases thereupon, causes the application under many circumstances of this type of optical system to be restricted.Seek that structure is light and handy for this reason, compact in design, have large visual field and high resolving power shows that the visual optical system of image becomes the development trend of this type of imaging display system gradually.
Summary of the invention
In order to address the above problem, the invention provides a kind of have large visual field, the see-through display part based on planar extension optical waveguide that display frame quality is high.
To achieve these goals, see-through display part provided by the invention adopts following technical scheme.
A see-through display part for planar extension optical waveguide, has such feature: comprise successively: display light source, shows required image light waves for sending, collimation lens, sends collimated light waves after image light waves is collimated, light wave coupling input prism, sends coupling light wave after collimation light wave is coupled, slab guide substrate, carries out reflections propagate to coupling light wave and forms the ejected wave that is all-trans, light wave coupling output prism, output display light wave after the ejected wave that is all-trans is coupled, and light wave expands group, disclosing solution is carried out to planar development, wherein, collimation lens is arranged between display light source and light wave coupling input prism, collimation lens collimates to image light waves, and make collimated light waves incide light wave coupling input prism with certain angle, light wave coupling input prism is connected to one end of slab guide substrate, collimated light waves is coupled in slab guide substrate, the light wave that makes to be coupled forms the ejected wave that is all-trans and propagates in slab guide substrate, light wave coupling output prism is connected to the other end of slab guide substrate, the ejected wave that will be all-trans is coupled out slab guide substrate, thereby form the disclosing solution that expands group output to light wave, light wave expands group and is connected on light wave coupling output prism, utilize mirror imaging principle to launch disclosing solution.
In see-through display part provided by the invention, can also there is such feature: wherein, collimation lens adopts column prism, collimation lens has light wave input face, light wave output face, and light wave input face is plane, and light wave output face is arc surface, light wave input face alignment image light wave, light wave coupling input prism is aimed in light wave output face, and collimation lens collimates the image light waves receiving, then by light wave output face, the light wave after collimation is incided to light wave coupling input prism obliquely.
In see-through display part provided by the invention, can also have such feature: wherein, slab guide substrate is comprised of the upper glass plane being parallel to each other and lower-glass plane, coupling light wave forms the ejected wave that is all-trans between upper glass plane and lower-glass plane.
In see-through display part provided by the invention, can also there is such feature: wherein, light wave coupling input prism has the collimated light waves plane of incidence, the output face of coupling light wave, the first reflecting surface, the first reflecting surface and the output face of coupling light wave form the first angle, and the first reflecting surface flushes with upper glass plane, by coupling light wave reflection to slab guide substrate.
In see-through display part provided by the invention, can also there is such feature: wherein, light wave coupling output prism has the second reflecting surface and display plane, and the second reflecting surface and display plane form the second angle, display plane flushes with lower-glass plane, and light wave coupling output prism will be all-trans after ejected wave coupling by display plane output display ripple.
In see-through display part provided by the invention, can also there is such feature: wherein, light wave expands group by row's microprism cell formation, and there is plane of incidence and launch plane, plane of incidence overlaps with display plane, launches plane disclosing solution is carried out to planar development, expands visual field.
In see-through display part provided by the invention, can also there is such feature: wherein, the collimated light waves plane of incidence and the output face of coupling light wave are coated with anti-reflection film, on the first reflecting surface, be coated with reflectance coating, the upper glass plane surface corresponding with lower-glass plane is coated with reflectance coating, the second reflecting surface is coated with reflectance coating, and display plane is coated with anti-reflection film.
In see-through display part provided by the invention, can also there is such feature: wherein, the projected area of coupling light wave output face in lower-glass plane is for inciding for the first time half of light wave overlay area area in lower-glass plane; Coupling light ripple forms coboundary light wave and lower limb light wave, image light waves after coupling is between coboundary light wave and lower limb light wave, coboundary light wave after coupling through lower-glass plane reflection to upper glass plane, coboundary light wave forms the first incidence point in upper glass plane, lower limb light wave after coupling is refracted to lower-glass plane through the output face of coupling light wave, lower limb light wave forms the second incidence point on the light wave output plane of light wave coupling input prism, the first incidence point is adjacent with the second incidence point position
In see-through display part provided by the invention, can also there is such feature: wherein, the angle of the first angle and the second angle equates.
In see-through display part provided by the invention, can also there is such feature: wherein, between the length S of plane of incidence and the length L of lower-glass plane, meet following relation:
Wherein, N is quantity to S=N * L, and N >=10.
Effect and the effect of invention
According to the see-through display part based on planar extension optical waveguide provided by the invention, utilize collimation lens to collimate to light wave; Coupling output prism is coupled to slab guide substrate by light wave; Slab guide substrate carries out total reflection propagation to light wave; Coupling output prism reflects slab guide substrate by light wave; And light wave expands group light wave is positioned to expansion.Especially use light wave to expand group light wave is positioned to expansion, therefore, the present invention has large visual field, outstanding advantages that display frame quality is high.In addition, also adopt prism as light wave coupling input, output device, therefore also have coupling efficiency high, light-wave energy loss is few, and output image picture is advantage clearly.
Accompanying drawing explanation
Fig. 1 is the structural representation of see-through display part in embodiments of the invention;
Fig. 2 is partial enlarged drawing corresponding to letter b in see-through display part in Fig. 1;
Fig. 3 is partial enlarged drawing corresponding to alphabetical A in see-through display part in Fig. 1;
Fig. 4 be in Fig. 1 in see-through display part light wave expand the structural representation of group;
Fig. 5 adopts convex lens as the light wave propagation schematic diagram of light wave coupling input prism in comparative example; And
Fig. 6 is the structural representation that includes the wearing demonstration article of see-through display part in embodiments of the invention.
In figure, 1. display light source, 2. image light waves, 3. collimation lens, 31. light wave input faces, 32. light wave output faces, 4. prism is inputted in light wave coupling, the 41. collimated light waves planes of incidence, 42. first reflectings surface, 43. coupling light wave output faces, 5. slab guide substrate, 51. upper glass planes, 52. lower-glass planes, 6. light wave coupling output prism, 61. second reflectings surface, 62. display planes, 7. light wave expands group 71. plane of incidences, 72. launch plane, 8. microprism unit, 9. light source, 10. display module, 201. pointolite, 202. image light waves, 203. biconvex lens, 204. light wave coupling input prisms, 205. slab guide substrates.
Embodiment
Following examples are specifically addressed the present invention by reference to the accompanying drawings.
Embodiment mono-
Fig. 1 is the structural representation of see-through display part in embodiments of the invention.
As shown in Figure 1, this see-through display part 100 based on planar extension optical waveguide comprises successively: display light source 1, shows required image light waves 2 for sending, collimation lens 3, sends collimated light waves after image light waves 2 is collimated, light wave coupling input prism 4, sends coupling light wave after collimation light wave is coupled, slab guide substrate 5, carries out reflections propagate to coupling light wave and forms the ejected wave that is all-trans, light wave coupling output prism 6, output display light wave after the ejected wave that is all-trans is coupled, and light wave expands group 7, disclosing solution is carried out to planar development, wherein, collimation lens 3 is arranged between display light source 1 and light wave coupling input prism 3, 3 pairs of image light waves 2 of collimation lens collimate, and make collimated light waves 2 incide light wave coupling input prism 4 with certain angle, light wave coupling input prism 4 is connected to one end of slab guide substrate 5, collimated light waves is coupled in slab guide substrate 5, the light wave that makes to be coupled forms the ejected wave that is all-trans and propagates in slab guide substrate 5, light wave coupling output prism 6 is connected to the other end of slab guide substrate 5, the ejected wave that will be all-trans is coupled out slab guide substrate 5, thereby form the disclosing solution that expands group 7 outputs to light wave, light wave expands group 7 and is connected on light wave coupling output prism 6, utilize mirror imaging principle to launch disclosing solution.
Collimation lens 3, is comprised of the lens pillar after cutting.Collimation lens 3 has light wave input face 31, light wave output face 32, light wave input face 31 is plane, light wave output face 32 is arc surface, light wave input face 31 alignment image light waves, light wave coupling input prism 4 is aimed in light wave output face 32, collimation lens 3, according to the size of light source in system and in order to make light wave utilize total reflection to transmit in slab guide substrate 5, and designs accordingly and processes.Utilize 3 pairs of the collimation lenses image glistening light of waves 2 from display light source 1 to collimate, it is incided in light wave coupling input prism 4.
Light wave coupling input prism 4 has the collimated light waves plane of incidence 41, coupling light wave output face 43, the first reflecting surface 42, the first reflecting surface 42 and coupling light wave output face 43 form the first angle, and the first reflecting surface 42 flushes with upper glass plane 51, by coupling light wave reflection to slab guide substrate 5.Light wave coupling input prism 4, as input coupling assembly, is mainly used in the collimated light waves of self-focus lens 3 in the future and is coupled in slab guide substrate 5.In the process being coupled, mainly utilize principle of reflection to change light wave propagation direction, when light wave is transmitted in slab guide substrate 5, meet total reflection condition and transmit.For can be as much as possible collimated light waves Energy Coupling to slab guide substrate 5 and form virtual image, need to be in the collimated light waves plane of incidence 41, the output face of coupling light wave 43 evaporation one deck anti-reflection films.
Upper glass plane 51 and lower-glass plane 52 that slab guide substrate 5 is parallel to each other by two sides form.The glass material that can be used as at present optical waveguide substrates has many types (as K9, BK7 etc.), the refractive index of the every kind of material transmitance, the absorption coefficient differences that cause the angle of total reflection and material different from Abbe coefficient.Because slab guide substrate 5 is in the process of transmission total reflection light wave, need to be when meeting total reflection light wave and not reflecting slab guide substrate 5, reduce as far as possible the absorption of material to light-wave energy itself, otherwise will cause a large amount of light-wave energies to lose in transmitting procedure, affect the final visibility of image.Moreover the material of slab guide substrate 5 itself has limited the scope of image and the brightness of image that can in slab guide substrate 5, transmit, in order to expand the scope of transmitting image, conventionally need to, in upper glass plane 51 and lower-glass plane 52 according to the certain reflective coating of demand evaporation, to the angle of total reflection of slab guide substrate 5 materials, give certain expansion.
Fig. 2 is partial enlarged drawing corresponding to letter b in see-through display part in Fig. 1.
As shown in Figure 1 and Figure 2, light wave coupling output prism 6 has the second reflecting surface 61 and display plane 62, and the second reflecting surface 61 forms the second angle with display plane 62, display plane 62 flushes with lower-glass plane 52, and light wave coupling output prism 6 is mainly used to total reflection light wave to be coupled out slab guide substrate 5.While transmitting in slab guide substrate 5 due to total reflection light wave, meet total reflection principle, for making total reflection light wave coupling output plane optical waveguide substrates 5, the angle of total reflection light wave and lower-glass plane 52 normals should be less than the angle of total reflection (being 41.8 ° for the BK7 glass angle of total reflection).In order to realize above-mentioned condition, introduce light wave coupling output prism 6, thereby make total reflection light wave be less than the total reflection Ling Jie angle output plane substrate 6 that is coupled by the light wave reflection angle on display plane that be coupled after the reflection of output prism 6.In order to make light-wave energy coupling as much as possible output, conventionally need to be on the second reflecting surface 61 evaporation one deck reflectance coating, evaporation one deck anti-reflection film on display plane 62.
Fig. 4 be in Fig. 1 in see-through display part light wave expand the structural representation of group.
As Figure 1 and Figure 4, light wave expands group 7 and is comprised of microprism unit 8, it has plane of incidence 71 and launches plane 72, plane of incidence overlaps with display plane, demonstration light wave for coupling output, due to the variation of direction in space and the angle of divergence is excessive only has local light wave can enter observer's pupil while causing direct observation, thereby it is too little to cause observing visual field, therefore need to introduce light wave, expands group 7.Utilize mirror imaging principle to launch the light wave of coupling output, thereby expand, observe visual field.Light wave in the present embodiment expands group 7, utilizes prism group that the light wave of coupling output is expanded, and makes all imaging ground output optical signals separately of its each microprism unit 8, thus the whole observation visual field that expands.Gapped or have a lap for fear of output image, each microprism unit should be connected mutually in the projection launching in plane 72, the number that composition light wave expands the microprism unit 8 of group 7 can increase and decrease according to specific requirement, in order to reach the effect expanding, light wave expands and in group 7, between the length of plane of incidence 71 and the length of lower-glass plane 52, meets following relation:
S=n×L
Wherein, S is the length of plane of incidence 71, and L is the length of lower-glass plane 52, and n is ratio between the two, and n is greater than 10 conventionally.
The job step of waveguide device of the present invention and exemplary application:
Fig. 3 is partial enlarged drawing corresponding to alphabetical A in see-through display part in Fig. 1.
As shown in Figures 1 to 4, from the image light waves 2 of display light source 1, after collimation lens 3 standards, oblique incidence is to coupling input prism 4 inside.Collimated light waves enters after coupling input prism 4, in order to guarantee that collimated light waves energy reduces loss as much as possible, must guarantee that the angle between collimated light waves and the normal of the first reflecting surface 42 is greater than the cirtical angle of total reflection.The first reflecting surface 42 of inputting prism 4 by coupling reflects, and meeting to occur to reflect with the coupling light wave output face 43 of coupling input prism 4 enters in slab guide substrate 5.In slab guide substrate 5, because the angle of the normal between coupling light wave and upper glass plane 51 and lower-glass plane 52 is greater than the cirtical angle of total reflection, thereby guarantee that total reflection light wave does not cause energy loss because refraction leaks out slab guide substrate 5, thereby guaranteed brightness and visual field that image is final.For part light wave, owing to cannot guaranteeing that can make it constrain in slab guide substrate 5 completely carries out total reflection transmission, can in upper glass plane 51 and lower-glass plane 52, plate the loss that reflectance coating reduces reflecting surface light-wave energy for this reason.Total reflection light wave enters coupling output prism 6 through the transmission in slab guide substrate 5, meet with the second reflecting surface 61 of coupling output prism 6, reflection through the second reflecting surface 61, angle between the normal of total reflection light wave and display plane 62 is less than the cirtical angle of total reflection, thereby total reflection light wave refraction out-of-plane optical waveguide substrates 5, enters light wave and expands group 7, by light wave, is expanded the reorientation of group 7 and is expanded, the image of transmission is launched through row, reached the effect that expands visual field.
For fear of light wave, expand between the image of organizing 7 outputs and have dark space and can realize the expansion to input picture, must have two conditions to be met:
One, the projected area of coupling light wave output face 43 in lower-glass plane 52, for inciding for the first time half of light wave overlay area area in lower-glass plane 52, satisfies condition:
2×S2=S1
Wherein, S2 is the projected area of coupling light wave output face 43 in lower-glass plane 52, and S1 is for inciding for the first time the light wave overlay area area in lower-glass plane 52.
Two, the image light waves after coupling is between coboundary light wave and lower limb light wave, coboundary light wave after coupling reflexes to upper glass plane 51 through lower-glass plane 52, coboundary light wave forms the first incidence point in upper glass plane 51, lower limb light wave after coupling is refracted to lower-glass plane 52 through coupling light wave output face 43, lower limb light wave forms the second incidence point in coupling light wave output face 43, and the first incidence point is adjacent with the second incidence point position.
Light wave is after the collimation of collimation lens 3, and refraction enters light wave coupling input prism 4 obliquely, and light wave coupling input prism 4 guarantees that light wave enters slab guide substrate 5 in total reflection.Due to the existence of collimation lens 3, make the oblique incidence of collimated light waves to the collimated light waves plane of incidence 41 of light wave coupling input prism 4.
Fig. 5 adopts convex lens as the light wave propagation schematic diagram of light wave coupling input prism in comparative example.
As shown in Figure 5, after image light waves 202 collimations that perspective display device 200 in comparative example only adopts common biconvex lens 203 that pointolite 201 is sent, be refracted into coupling input prism 204, in light wave coupling input prism 204, there is total reflection in light wave, light wave cannot enter slab guide substrate 205 and carry out total reflection transmission, thereby do not have the effect of collimation lens in the present embodiment, so the existence of collimation lens 3 greatly facilitates collimated light waves and is directly incident in slab guide substrate 5.
As shown in Figure 2 and Figure 3, conventionally in optical design, the main shaft light wave of take carries out determining of parameter as reference light wave, and for making main shaft light wave meet above-mentioned transmission conditions, each parameters relationship meets:
α
sur1=α
in＜45°
Wherein, α
inthe angle between coupling light wave output face 43 and the first reflecting surface 42, α
sur1it is the angle between coupling light wave output face 43 and lower-glass plane 52.For different coupling requirements, light wave coupling input prism can be done corresponding rotation, and now drift angle becomes:
α'
in=α
in+α
rotate
Wherein, α '
inthe angle being coupled between light wave output face 43 and the first reflecting surface 42 after rotation, α
rotateangle for 4 rotations of light wave coupling input prism.
When light path design, in order to keep key light wave line of propagation not to be changed when waveguide becomes input and output, therefore
α
out=α
in
Wherein, α
outit is the angle between the second reflecting surface 61 and display plane 62.
In order to make light wave expand group 7, play the effect expanding, avoid the appearance of ghost image simultaneously and show between image have dark space, for light wave, expand the inclined angle alpha of group
sur2should meet:
α
sur2＞45°
Meeting under the prerequisite of above-mentioned relation, work as α
sur1in the time of=30 °,
α
in=30°
α
out=30°
α
sur2=60°
With above-mentioned parameter designing waveguide device, collimated light waves refraction enters coupling input prism 4, and the slab guide substrate 5 that is coupled into of inputting prism 4 through overcoupling is transferred to coupling output prism 6, directly enters light wave expand group 7 by coupling output prism 6 reflection couplings.Because light wave expands group 7, utilize mirror imaging principle, the light signal from light source can be exported again individually in each microprism unit 8.For observer, the light wave of the image of collecting due to different angle observers is different, cause observer can between see whole image frame, thereby increased image planes, observe visual field.
Fig. 6 is the structural representation that includes the wearing demonstration article of see-through display part in embodiments of the invention.
As shown in Figure 6, by see-through display part of the present invention being used for dressing demonstration article 300, by the demonstration communication from display light source 9, to display module 10, give real-time demonstration on the one hand, because the assembly in the present embodiment adopts special diaphragm, do not stop entering of extraneous natural light completely, therefore can also observe the variation of outside scenery simultaneously.
The effect of embodiment and effect
The see-through display part based on planar extension optical waveguide relating to according to the present embodiment, usings prism as light wave coupling input, output device, and coupling efficiency is high, and light-wave energy loss is few, and output image picture is advantage clearly; In the present embodiment, adopt light wave to expand group light wave is positioned to expansion, therefore there are large visual field, high these outstanding advantages of display frame quality.
In the see-through display part based on planar extension optical waveguide relating to due to the present embodiment, the see-through display part that its assembly does not adopt special diaphragm to stop that entering of extraneous natural light relates to the present embodiment completely applies to wearable demonstration article, both the realtime graphic picture from display light source can be watched, extraneous scenery can also be observed.
The see-through display part based on planar extension optical waveguide that the present embodiment relates to only adopts collimation lens, coupling input prism, optical waveguide substrates, coupling output prism and light wave expand group, therefore, see-through display part based on planar extension optical waveguide in the present embodiment also has compact conformation on the whole, and volume is little lightweight, the simple advantage of manufacturing process.
Certainly the see-through display part based on planar extension optical waveguide involved in the present invention is not merely defined in described in the present embodiment structure.
Claims (10)
1. the see-through display part based on planar extension optical waveguide, is characterized in that, comprises successively:
Display light source, shows required image light waves for sending;
Collimation lens, sends collimated light waves after described image light waves is collimated;
Light wave coupling input prism, sends coupling light wave after described collimated light waves is coupled;
Slab guide substrate, carries out reflections propagate to described coupling light wave and forms the ejected wave that is all-trans;
Light wave coupling output prism, output display ripple after the described ejected wave that is all-trans is coupled;
Light wave expands group, and described disclosing solution is carried out to planar development,
Wherein, described collimation lens is arranged between described display light source and described light wave coupling input prism, and described collimation lens collimates to described image light waves, and makes described collimated light waves incide described light wave coupling input prism with certain angle,
Described light wave coupling input prism is connected to one end of described slab guide substrate, and described collimated light waves is coupled in described slab guide substrate, and the described coupling light wave ejected wave that is all-trans described in forming in described slab guide substrate is propagated,
Described light wave coupling output prism is connected to the other end of described slab guide substrate, will described in the ejected wave that is all-trans be coupled out described slab guide substrate, thereby form the described disclosing solution that expands group output to described light wave,
Described light wave expands group and is connected on described light wave coupling output prism, utilizes mirror imaging principle to launch described disclosing solution.
2. see-through display part according to claim 1, is characterized in that:
Wherein, described collimation lens adopts column prism, described collimation lens has light wave input face, light wave output face, described light wave input face is plane, described light wave output face is arc surface, described light wave input face is aimed at described image light waves, described light wave coupling input prism is aimed in described light wave output face, and the incident angle of coupling light wave in described light wave output face is less than the cirtical angle of total reflection, described collimation lens collimates the image light waves receiving, by described light wave output face, the light wave after collimation is incided to described light wave coupling input prism obliquely again.
3. see-through display part according to claim 1, is characterized in that:
Wherein, described slab guide substrate is comprised of the upper glass plane being parallel to each other and lower-glass plane, and ejected wave is all-trans described in described coupling light wave forms between described upper glass plane and described lower-glass plane.
4. see-through display part according to claim 3, is characterized in that:
Wherein, described light wave coupling input prism has the collimated light waves plane of incidence, the output face of coupling light wave, the first reflecting surface, described the first reflecting surface and the output face of coupling light wave form the first angle, and described the first reflecting surface flushes with described upper glass plane, described coupling light wave reflection is arrived to described slab guide substrate.
5. see-through display part according to claim 4, is characterized in that:
Wherein, described light wave coupling output prism has the second reflecting surface and display plane, and the second reflecting surface and described display plane form the second angle, described display plane flushes with described lower-glass plane, described light wave coupling output prism will described in be all-trans after ejected wave coupling by described display plane output display ripple.
6. see-through display part according to claim 5, is characterized in that:
Wherein, described light wave expands group and consists of row's prism unit, and has plane of incidence and launch plane, and described plane of incidence overlaps with described display plane, and described expansion plane is carried out planar development to disclosing solution, expands visual field.
7. follow according to perspective display system claimed in claim 6, it is characterized in that:
Wherein, the described collimated light waves plane of incidence and the output face of coupling light wave are coated with anti-reflection film, on the first reflecting surface, are coated with reflectance coating,
Described upper glass plane is coated with reflectance coating with the corresponding surface of described lower-glass plane,
Described the second reflecting surface is coated with reflectance coating, and described display plane is coated with anti-reflection film.
8. follow according to perspective display system claimed in claim 6, it is characterized in that:
Wherein, the projected area of described coupling light wave output face in described lower-glass plane is for inciding for the first time half of light overlay area area in described lower-glass plane;
Described coupling light ripple forms coboundary light wave and lower limb light wave, the described image light waves after coupling between described coboundary light wave and described lower limb light wave,
Described coboundary light wave after coupling is through described lower-glass plane reflection to described upper glass plane, and described coboundary light wave forms the first incidence point in described upper glass plane,
Described lower limb light wave after coupling is refracted to described lower-glass plane through the output face of described coupling light wave, and described lower limb light wave forms the second incidence point on the light wave output plane of described light wave coupling input prism,
Described the first incidence point is adjacent with described the second incidence point position.
9. follow according to perspective display system claimed in claim 5, it is characterized in that:
Wherein, the angle of described the first angle and described the second angle equates.
10. follow according to perspective display system claimed in claim 6, it is characterized in that:
Wherein, between the length L of described plane of incidence and the length S of described lower-glass plane, meet following relation:
S=N×L
Wherein, quantity N >=10.
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| CN110573932A (en) * | 2017-06-06 | 2019-12-13 | 苹果公司 | Optical system for electronic device with display |
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| US11523092B2 (en) | 2019-12-08 | 2022-12-06 | Lumus Ltd. | Optical systems with compact image projector |
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| US10962784B2 (en) | 2005-02-10 | 2021-03-30 | Lumus Ltd. | Substrate-guide optical device |
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| US11523092B2 (en) | 2019-12-08 | 2022-12-06 | Lumus Ltd. | Optical systems with compact image projector |
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