CN203587827U - Light guide device and virtual image display device - Google Patents
Light guide device and virtual image display device Download PDFInfo
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- CN203587827U CN203587827U CN201320503208.6U CN201320503208U CN203587827U CN 203587827 U CN203587827 U CN 203587827U CN 201320503208 U CN201320503208 U CN 201320503208U CN 203587827 U CN203587827 U CN 203587827U
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Abstract
The utility model provides a light guide device and a virtual image display device; the light guide device has a penetrate function allowing external light and image light to display in an overlay manner; an air bubble is prevented from entering a connecting portion with a formed half transmitting surface, thereby ensuring excellent penetration performance. A second surface S12 as the connecting surface and a second transmitting surface S52 as an opposite surface form a shape enabling a mutual distance difference d to monotonously enlarges when departing away from an original point OX being a minimum position; therefore, in formation of a connecting portion 60, a minimum position in an attaching zone is coated with attaching agent so as to form the connecting portion 60; the coated attaching agent slowly and uniformly and stably expands form the minimum position to an outer side, the bubble generation is prevented in the connecting portion 60, thereby ensuring excellent penetration performance between a light guide prism 10 and a relative prism 50.
Description
Technical field
The utility model relates to the guiding device of guiding image light and/or ambient light etc., especially, relate at the head that is worn on observer with guiding device applicable in pointing out the head mounted display of image light to observer and use the manufacture method of virtual image display apparatus and the guiding device of this guiding device.
Background technology
Various optical systems (for example, with reference to patent documentation 1) of assembling in the virtual image display apparatus of head mounted display (following, also referred to as HMD) etc. of head that is worn on observer are proposed.
About the virtual image display apparatus of HMD etc., along with miniaturization and light-weighted development, be desirably in the situation that does not reduce image quality and realize wide viewing angle.Further, if covered, only see the state of image light in observer's the visual field comprehensively, worry cannot judge extraneous state for observer.Be not so good as so the new purposes of watching the external world and image that virtual and real situation are provided by overlapping with it.Therefore, expect not hinder the display of the extraneous visual field and overlapping show image light.And, in order to improve observer's installation sense, improve the form of outward appearance, conventionally expect to approach the form of glasses, expect to make image display be not be placed on eye top but in the horizontal side configured separate of face.
But, in the occasion with guiding device applicable in the virtual image display apparatus that penetrates (perspective) function of overlapping demonstration ambient light and image light, for example, the half transmitting face of inclination for being overlapped, ambient light and image light is set in one end of block light guide member, in the occasion of carrying out above operation, need to make other paired block light transparent member engage, to make up the inclination of this half transmitting face, cover at the moment uniformly.But, if having bubble to enter bonding station, cannot guarantee good penetration performance when engaging like this.
Also have, even in the occasion that does not penetrate function, for example, the reflecting surface of inclination is set to take out image light, in the occasion of carrying out above operation, due to the problem of outward appearance and/or intensity, sometimes make paired block components bonding in the position that reflecting surface is set, if have bubble to enter bonding station when engaging like this, likely occur distortion at reflecting surface.
Patent documentation
Patent documentation 1: TOHKEMY 2012-27350 communique
Utility model content
The purpose of this utility model is the manufacture method that a kind of guiding device is provided and uses its virtual image display apparatus and guiding device, this guiding device guiding show image light, suppress bubble and enter in the junction surface that forms reflecting surface, for example, in the occasion of the penetration performance with the ambient light of making and the overlapping demonstration of image light, can guarantee good penetration performance.
The guiding device that the utility model relates to comprises: (a) leaded light prism, there is the composition surface of supporting mirror layer, and this mirror layer carries out the image reflection of light at internal communication; (b) relative prism, has and the opposite face of the relative configuration in composition surface in leaded light prism, and between composition surface and opposite face, configures and engage mirror layer; (c) junction surface, is formed at the fit area of the composition surface of leaded light prism and the opposite face of relative prism, and leaded light prism is engaged with relative prism by plastering agent; (d) wherein, above-mentioned guiding device visuognosis image light; (e) wherein, the composition surface of leaded light prism and the opposite face of relative prism become clip difference that above-mentioned junction surface makes mutual distance along with the minimum position from predetermined away from and the shape that increases.
In above-mentioned guiding device, at junction surface, relatively the opposite face of prism with respect to the distance between the composition surface of leaded light prism become more from above-mentioned predetermined minimum position away from and larger relation.In a word, become the shape that the thickness of the fit area that plastering agent fills is slowly expanded from predetermined minimum position.Thus, in the formation at junction surface, if for example position coating corresponding with predetermined minimum position will become the plastering agent at junction surface in fit area, the plastering agent of coating is pushed towards periphery, plastering agent is from the position slowly stable expansion equably laterally of coating, thus, can suppress the generation of bubble.
According to concrete aspect of the present utility model, in leaded light prism, mirror layer is the semi-transparent semi-reflecting lens layer that carries out the reflection of part of image light and the transmission of the part of ambient light.In this occasion, by suppressing the generation of bubble, at the junction surface completing, be between leaded light prism and relative prism, can guarantee good penetration performance.
According to concrete aspect of the present utility model, the composition surface of leaded light prism and the opposite face of relative prism become make above-mentioned predetermined minimum position be arranged in fit area with the scope of mirror ply in shape.In this occasion, in the region corresponding at the mirror layer overlapping with making image light and ambient light, can suppress especially the generation of bubble.
According to other aspect of the present utility model, the composition surface of leaded light prism becomes and makes above-mentioned predetermined minimum position be arranged at the shape of the central portion at junction surface with the opposite face of relative prism.In this occasion, easily make the plastering agent that must become junction surface spread all over the whole positions that are filled in needs.
According to other aspect of the present utility model, the composition surface of leaded light prism becomes and makes above-mentioned predetermined minimum position be arranged at the shape of the end of fit area with the opposite face of relative prism.In this occasion, can make the coating position of plastering agent become the perimeter sides from removing with the scope of mirror ply in fit area.
According to other aspect of the present utility model, the composition surface of leaded light prism is respectively curve form with the opposite face of relative prism.In this occasion, for example, can make the composition surface of leaded light prism there is magnification (power) as image reflection of light face.
According to other aspect of the present utility model, the composition surface of leaded light prism is to compare and have less radius-of-curvature curve form with the radius-of-curvature of the opposite face of relative prism.In this occasion, can become make as between the composition surface of curve form and opposite face along with from above-mentioned predetermined minimum position away from and the dull shape increasing.Moreover, can suppress by reducing the difference of the radius-of-curvature between two sides the deviation of the difference of the thickness at junction surface.
According to other aspect of the present utility model, the composition surface of leaded light prism becomes following shape with the opposite face of relative prism: about the residual quantity of mutual distance that accompanies junction surface, along composition surface, with to comparing for the Magnification that carries out the fully reflecting surface of image reflection of light and the intersection direction on composition surface and become vertical direction, higher to the Magnification of the intersection direction on fully reflecting surface and composition surface.In this occasion, when the joint of leaded light prism and relative prism, the plastering agent that forms junction surface is more easily flowed, so after joint, plastering agent remnants are not obvious to intersection direction.
According to other aspect of the present utility model, the composition surface of leaded light prism becomes following shape with the opposite face of relative prism: about the residual quantity of mutual distance that accompanies junction surface, form in the fit area at junction surface near the Thickness Ratio of the end of observer's side larger away from the thickness of the end of side.In this occasion, even if will become the width that increases junction surface in the part at junction surface for observer, be also to get significantly more difficult outstanding side, in engagement step, can to become the plastering agent at junction surface and guarantee abundant region for pushing equably.
According to other aspect of the present utility model, leaded light prism is formed by resin material respectively with relative prism.In this occasion, can with the shape of expecting, make leaded light prism and prism shaping relatively by injection mo(u)lding etc.Also have, contrary with it, likely produce the such foozle of rough surface of resin material, this may produce bubble when engaging, but, residual quantity by becoming the distance that makes composition surface and opposite face along with the minimum position from predetermined away from and the dull shape increasing can suppress the generation of bubble.
According to other aspect of the present utility model, the difference of the refractive index of plastering agent and the refractive index of resin material is in ± 0.05.In this occasion, can suppress fully the distortion that junction surface causes for the refringence of leaded light prism and relative prism.
According to other aspect of the present utility model, leaded light prism comprises 3 above light guiding surfaces to inside guiding image light; When in the multiple light guiding surfaces by forming leaded light prism the 1st and the 3rd facial vision identification external world, diopter (Visual degree) is roughly 0; On the 2nd of configuration between the 1st and the 3rd, form mirror layer; Regard to observation side and become concave for the 1st and the 3rd; Leaded light prism makes image light by the 3rd total reflection, and by the 1st total reflection, after the 2nd reflection, the 1st of transmission, arrives observation side.In this occasion, can make prism slimming make the whole miniaturization ands of optical system, so can make center of gravity approach observer, improve and wear sense.Moreover the 2nd face also becomes the composition surface engaging with relative prism.
According to other aspect of the present utility model, leaded light prism makes to be roughly 0 for the diopter of ambient light with relative prism, and ambient light and image light are pointed out to observer overlappingly.In this occasion, can reduce defocusing and distortion across the ambient light of the 2nd observation.
The virtual image display apparatus that the utility model relates to comprises: the guiding device of (a) recording as above-mentioned either side; (b) image display element of generation image light; (c) make the projection lens that penetrates towards above-mentioned guiding device from the image light of image display element.In this occasion, by adopting the guiding device of above-mentioned either side, can guarantee good penetration performance.
In the manufacture method of the guiding device that the utility model relates to, above-mentioned guiding device comprises: (a1) leaded light prism, there is the composition surface of supporting mirror layer, and this mirror layer carries out image reflection of light; (a2) relative prism, has the opposite face with the relative configuration in composition surface in leaded light prism; (b) the guiding device visuognosis image light in above-mentioned manufacture method; Comprise (c) plastering agent application step, wherein the composition surface of leaded light prism and the opposite face of relative prism become the difference that makes mutual distance along with the minimum position from predetermined away from and the shape that increases, the coating position coating plastering agent corresponding with above-mentioned predetermined minimum position between composition surface and opposite face; (d) plastering agent filling step, wherein pushes the plastering agent being coated with in plastering agent application step from coating position, to fit area, fill; (e) junction surface forms step, wherein makes the plastering agent of filling in plastering agent filling step harden, and by plastering agent, forms junction surface.
In the manufacture method of above-mentioned guiding device, in plastering agent filling step, make the plastering agent in the coating position coating corresponding with above-mentioned predetermined minimum position in plastering agent application step, the slowly expansion laterally from coating position, at junction surface, form in step that opposite face by two prisms being engaged make relative prism becomes more from coating position away from for the distance on the composition surface of leaded light prism and the relation more left, stablize equably expansion plastering agent, can be suppressed in making step and have bubble to occur.Therefore, at the junction surface completing, be between leaded light prism and relative prism, can guarantee good penetration performance.
Accompanying drawing explanation
Fig. 1 is the stereographic map that the outward appearance of the virtual image display apparatus of the guiding device that comprises the 1st embodiment is described.
Fig. 2 is the stereographic map of the agent structure of explanation virtual image display apparatus.
Fig. 3 (A) is the sectional drawing of overlooking that forms the main part of the 1st display device of virtual image display apparatus, (B) is the front view of main part.
Fig. 4 (A) is about a sectional drawing of the horizontal direction of the structure of expression guiding device, (B) is the front view that represents the structure of guiding device.
Fig. 5 (A) is about a sectional drawing of the vertical direction of the structure of expression guiding device, (B) is the front view that represents the structure of guiding device.
Fig. 6 (A) represents the figure with the situation of relative prism coating plastering agent for leaded light prism, (B) being the figure that represents to be clipped by leaded light prism and relative prism the situation of plastering agent, is (C) figure that represents the situation that pushes the plastering agent clipping.
Fig. 7 (A)～(D) is the figure that represents the making step of the guiding device of the 1st embodiment.
Fig. 8 (A)～(D) is the figure with respect to the making step of the expression comparative example of Fig. 7 (A)～Fig. 7 (D).
Fig. 9 (A) is the sectional drawing of overlooking of the guiding device for the 2nd embodiment is described and the virtual image display apparatus that uses it, (B) is front view.
Figure 10 is other the sectional drawing of structure of an example that represents guiding device.
Figure 11 (A) is other the sectional drawing of an example of explanation guiding device and the virtual image display apparatus that uses it, (B) is front view.
Figure 12 (A) is other the stereographic map of an other example of explanation guiding device and the virtual image display apparatus that uses it, (B) is front view.
The explanation of symbol
AX1-AX5 ... optical axis, AXI ... light incident side optical axis, AXO ... emitting side optical axis, EY ... eye, GL ... image light, HL ... ambient light, II ... the image planes of intermediary image, PA ... subregion, QA ... all regions, JD ... fit area, S11 ... the 1st, S12 ... the 2nd, JS ... composition surface, S13-S16 ... the 3rd the-the 6th, S51 ... the 1st transmission plane, S52 ... the 2nd transmission plane, PS ... opposite face, S53 ... the 3rd transmission plane, SL ... illumination light, SR ... reference field, 10 ... prism, 10s ... prism main body, 11, 12 ... component prism, 15 ... semi-transparent semi-reflecting lens layer (mirror layer), 20 ... guiding device, 30 ... projection lens, 31, 32, 33 ... lens, 50 ... prism relatively, 60 ... junction surface, 70 ... projection arrangement for perspective, 80 ... image display device, 81 ... lighting device, 82 ... image display element, 84 ... drive control part, 100 ... virtual image display apparatus, 100A, 100B ... display device, 103a, 103b ... opticator, 101 ... perspective parts, 102 ... framework, CC ... plastering agent, MN ... minimum position, OX ... initial point, FP ... coating position (initial stage coating position)
Embodiment
The 1st embodiment
Below, on one side with reference to accompanying drawing, about the virtual image display apparatus of the guiding device that comprises the 1st embodiment that the utility model relates to, explain on one side.
A. the outward appearance of virtual image display apparatus
The virtual image display apparatus 100 of the present embodiment that Fig. 1 represents is the head mounted display with the such outward appearance of glasses, can the image light of visuognosis based on the virtual image to the observer who wears this virtual image display apparatus 100, and, can make observer carry out visuognosis or observe extraneous picture by perspective.Virtual image display apparatus 100 possesses: perspective parts 101, cover observer at the moment; Framework 102, supports perspective parts 101; The the 1st and the 2nd built-in device 105a of portion, 105b, be attached to the part from the cap at the two ends, left and right of framework 102 to the suspended portion (temples) at rear.Here, perspective parts 101 are the opticses (seeing through eyeshade) that cover observer's generous bending at the moment, are divided into the 1st opticator 103a and the 2nd opticator 103b.On accompanying drawing, by the 1st display device 100A of the 1st opticator 103a in left side and the 1st built-in device 105a of portion combination, be the part that forms the virtual image that right eye uses, even if also can be used as separately virtual image display apparatus, work.Further, on accompanying drawing, by the 2nd display device 100B of the 2nd opticator 103b on right side and the 2nd built-in device 105b of portion combination, be the part that forms the virtual image that left eye uses, even if also can be used as separately virtual image display apparatus, work.
B. the structure of display device
As shown in Fig. 2, Fig. 3 (A), 3 (B) etc., the 1st display device 100A possesses: projection arrangement for perspective 70 and image display device 80.Wherein, projection arrangement for perspective 70 possesses: comprise the guiding device 20 of light guide member and the projection lens 30 that imaging is used.Wherein, guiding device 20 is configured to and comprises: as leaded light prism 10 and the relative prism 50 of light guide member.If in other words, leaded light prism 10 with relative prism 50 by engaging and form guiding device 20 by junction surface 60.Further, the 10e above of leaded light prism 10 is stably fixed on the downside of framework 61 in the mode contacting with 61e below framework 61.Projection lens 30 is fixed on the end of leaded light prism 10 via the lens barrel 62 to its storage.In projection arrangement for perspective 70, leaded light prism 10 and relative prism 50 are the 1st opticator 103a that guiding device 20 is equivalent to Fig. 1, and the projection lens 30 of projection arrangement for perspective 70 and image display device 80 are equivalent to the 1st built-in device 105a of portion of Fig. 1.Moreover, because the 2nd display device 100B shown in Fig. 1 has the structure same with the 1st display device 100A, be only left and right reversion, so the detailed description of the 2nd display device 100B is omitted.
In projection arrangement for perspective 70, as the leaded light prism 10 of the part of guiding device 20, have: as prism main body 10s and the optical reflection film RM of basic main part.Leaded light prism 10 is circular-arc parts of overlooking along face bending, can be considered to be divided into the 2nd component prism 12 near the 1st component prism 11 of the center side of nose and the perimeter sides left from nose.The 1st component prism 11 conducts are configured in light emitting side and have the side of optical function, have the 1st S11, the 2nd S12 and the 3rd S13; The 2nd component prism 12 conducts are configured in light incident side and have the side of optical function, have the 4th S14, the 5th S15 and the 6th S16.Wherein, the 1st S11 is adjacent with the 4th S14, and the 3rd S13 is adjacent with the 5th S15, between the 1st S11 and the 3rd S13, configures the 2nd S12, between the 4th S14 and the 5th S15, configures the 6th S16.Further, leaded light prism 10 has and respect to one another 1st side 10e and 2nd side 10f adjacent with the 1st～6th S11～S16.
In leaded light prism 10, the 1st S11 is the free form surface of axle centered by the emitting side optical axis AXO parallel with Z axis, the 2nd S12 is the free form surface of axle centered by the optical axis AX1 that Z axis is tilted comprising in the reference field SR parallel with XZ face, and the 3rd S13 is the free form surface of axle centered by emitting side optical axis AXO.The 4th S14 is the free form surface of axle centered by 2 mean lines of a pair of optical axis AX3, the AX4 that Z axis is tilted that comprise in the reference field SR parallel with XZ face, the 5th S15 is the free form surface of axle centered by 2 mean lines of a pair of optical axis AX4, the AX5 that Z axis is tilted that comprise in the reference field SR parallel with XZ face, and the 6th S16 is the free form surface of axle centered by the optical axis AX4 that Z axis is tilted comprising in the reference field SR parallel with XZ face.Moreover the 1st～6th above S11～S16 clips in level (or laterally) and extends and the reference field SR that by optical axis AX1～AX5 etc. passed through parallel with XZ face, has symmetrical shape about the Y-axis of vertical (or longitudinally).
In leaded light prism 10, prism main body 10s is integrally formed by the resin material of showing higher transmitance in visible range, for example, and by making thermoplastic resin inject/solidify and moulding in type.Moreover, as the material of prism main body 10s, for example, can use cycloolefine polymer etc.
Leaded light prism 10, as mentioned before, can be considered to be divided into the 1st component prism 11 and the 2nd component prism 12, and still, wherein, the 1st component prism 11 can carry out guided wave and the ejaculation of image light GL, and, can carry out the perspective of ambient light HL.The 2nd component prism 12 can carry out incident and the guided wave of image light GL.
In the 1st component prism 11, the 1st S11 be as working to the plane of refraction of the outer ejaculation image of the 1st component prism 11 light GL, and, as being worked by the fully reflecting surface of inner face side total reflection image light GL.The 1st S11 is configured in the front of an EY, and observer is become to concave.
The 2nd S12 is the optics side of prism main body 10s, the additional semi-transparent semi-reflecting lens layer 15 in this optics side.This semi-transparent semi-reflecting lens layer 15 is the reflectance coatings (being semi-transparent semi-reflecting lens film or semipermeable reflection film) with transmitance.Not whole at the 2nd S12 of semi-transparent semi-reflecting lens layer 15, but form on the PA of its subregion.In a word, semi-transparent semi-reflecting lens layer 15 is formed at and relates generally to vertical direction and make on subregion PA that all region QA of the 2nd S12 expansion dwindle.In more detail, this subregion PA is configured in the center side about vertical Y direction, about the direction of the reference field SR along level, is roughly configuring on the whole.Semi-transparent semi-reflecting lens layer 15, in the bottom surface (optics side) of prism main body 10s, subregion PA is upper, by metallic reflective coating and/or dielectric multilayer film film forming are formed.The reflectivity of 15 couples of image light GL of semi-transparent semi-reflecting lens layer, becomes easy viewpoint in the observation that makes the ambient light HL based on penetrating, and in the ranges of incidence angles of the image light GL supposing, is more than 10% and below 50%.The reflectivity of the 15 couples of image light GL of semi-transparent semi-reflecting lens layer of specific embodiment, for example, be set as 20%, to the transmissivity of image light GL, for example, is set as 80%.
Further, the 2nd S12, as be described in detail later, also as accompanying the composition surface JS that junction surface 60 engages with relative prism 50.In the occasion of the 2nd S12 being regarded as to composition surface JS, all region QA of the 2nd S12 are equivalent to the fit area JD with relative prism 50.In a word, by filling the plastering agent that should become junction surface 60 at all region QA as fit area JD, leaded light prism 10 is engaged with relative prism 50, form guiding device 20.
The 3rd S13 works as the fully reflecting surface that is made image light GL total reflection by inner face side.The 3rd S13 is configured in the front of an EY, similarly observer become to concave with the 1st S11, and when watching ambient light HL by the 1st S11 and the 3rd S13, diopter roughly becomes 0.
At the 2nd component prism, 12, the 4 S14 work as the fully reflecting surface that is made image light GL total reflection by inner face side.
At 12, the 5 S15 of the 2nd component prism, by the additional optical reflection film RM being formed by inorganic material in the surface at prism main body 10s, form, as reflecting surface, work.
The 6th S16 is as working to the plane of refraction of the interior incidental image picture of the 2nd component prism 12 light GL.
Prism 50 is fixed with leaded light prism 10 one relatively, becomes 1 guiding device 20.Prism 50 is light transmission parts (auxiliary prism) of the perspective function of auxiliary leaded light prism 10 relatively, has: the 1st transmission plane S51, the 2nd transmission plane S52, the 3rd transmission plane S53 as the side with optical function.Between the 1st transmission plane S51 and the 3rd transmission plane S53, configure the 2nd transmission plane S52 here.The 1st transmission plane S51 is positioned on the curved surface of the 1st S11 prolongation that makes leaded light prism 10.The 2nd transmission plane S52 engages and integrated curved surface by the junction surface 60 as laminating layer with respect to the 2nd S12.In a word, the 2nd transmission plane S52 accompanies junction surface 60 and configures with S12 is relative as the 2nd of composition surface JS, also as the opposite face PS engaging with leaded light prism 10.The 3rd transmission plane S53 is positioned on the curved surface of the 3rd S13 prolongation that makes leaded light prism 10.Wherein, because the 2nd S12 of the 2nd transmission plane S52 and leaded light prism 10 is integrated by engaging, think roughly the same curvature, still, compared with the curvature of the 2nd S12, the curvature of the 2nd transmission plane S52 has the shape (with reference to Fig. 4 (A)) of slightly mild curvature.In a word, in the JD of fit area, Yue Cong center away from, face S12 and face S52 more become shape away from each other.Thus, when the joint of two sides S12, S52, make the filling homogenising of the plastering agent that should become junction surface 60, can suppress the generation of bubble, make to penetrate the state that keeps good.
Light transmission parts (auxiliary prism) 50 are shown higher transmitance in visible range, and the main part of prism 50 forms by the thermoplastic resin material with the refractive index roughly the same with the prism main body 10s of leaded light prism 10 relatively.
The lighting device 81 of image display device 80 has: light source 81a, the light of 3 looks that contain red, green, blue; The 81b of backlight light-guiding portion, makes to spread and form from the light of light source 81a the light beam of rectangular cross section.Image display element 82 forms by for example liquid crystal display, and on space, modulation is from the illumination light SL of lighting device 81, and formation will become the image light of the demonstration object of animation picture etc.Drive control part 84 possesses: light source driving circuit 84a and liquid crystal display drive circuit 84b.The light source 81a of light source driving circuit 84a illumination apparatus 81 supplies with electric power, makes it penetrate the illumination light SL of stable brightness.Liquid crystal display drive circuit 84b, by image display element 82 output image signals or driving signal, forms the coloured image light of the root that obtains animation and/or static picture as transmissivity figure.Moreover, can make liquid crystal display drive circuit 84b there is image processing function, still, also can make external control circuit there is image processing function.
Further, more than, as the 2nd S12 of the composition surface JS of leaded light prism 10, be free form surface as mentioned before.The operating characteristic of this free form surface is the curvature of curved surface, here as an example, carries out the curvature of occasion of matching as the curvature of composition surface JS using near the definite effective coverage initial point at the 2nd S12.This curvature, take the initial point of curved surface as benchmark, the coefficient of polynomial during by the expression of the face shape representing with local coordinate system about normal coordinates polynomial expansion is determined.Equally, the curvature using near the curvature initial point of the 2nd transmission plane S52 as opposite face PS.For example the initial point OX of the 2nd S12 is on the face of the 2nd S12, the z direction of local coordinate system become emitting side optical axis AXO with from the 2nd S12 towards the third side of the optical axis AX1 of the beam center of the 1st S11 to.Further, details aftermentioned, still, in illustrated example, initial point OX becomes minimum position between the 2nd S12 as composition surface JS and the 2nd transmission plane S52 as opposite face PS, if in other words, in making the thickness at junction surface 60, is that minimum position is minimum position MN.If in other words, exist consistent with initial point OX as the point on the 2nd S12 in minimum position MN.
C. the light path of image light etc.
Below, about light path key diagram 3 (A) of image light GL of virtual image display apparatus 100 etc. etc.
The image light GL penetrating from image display element 82 restrains by projection lens 30, and to the 6th the S16 incident that is arranged at the more intense positive light coke of having of leaded light prism 10.
The image light GL of the 6th S16 by leaded light prism 10 restrains while advances, and when by the 2nd component prism 12, by the 5th S15 with more weak positive light coke, is reflected, and by the 4th S14 with more weak negative power, is reflected.
The image light GL being reflected by the 4th S14 of the 2nd component prism 12, at the 1st component prism 11, to the 3rd S13 incident the total reflection with more weak positive light coke, to the 1st S11 incident the total reflection with more weak negative power.Moreover image light GL by the front and back of the 3rd S13, forms intermediary image in leaded light prism 10.The image planes II of this intermediary image, the image planes OI of corresponding image display element 82, still, is turned back by the 3rd S13.
By the image light GL of the 1st S11 total reflection, to the 2nd S12 incident, still, especially, to the image light GL of semi-transparent semi-reflecting lens layer 15 incident, partly see through on one side the partly reflection on one side of this semi-transparent semi-reflecting lens layer 15, to the 1st S11 incident passing through again.Moreover semi-transparent semi-reflecting lens layer 15, here, works as the parts for the image light GL of reflection with more intense positive light coke.Further, the 1st S11, the parts as the image light GL for by it with negative power work.
By the image light GL of the 1st S11, the pupil incident as almost parallel light beam to observer's eye EY.In a word, observer, by the image light GL as the virtual image, observes the image forming on image display element 82.
On the other hand, in ambient light HL, to compared with the 2nd S12 of leaded light prism 10-part of X side incident, by the 3rd S13 and the 1st S11 of the 1st component prism 11, still, at this moment, positive negative power offsets, and aberration is corrected.In a word, observer observes across leaded light prism 10 external world's picture that distortion is few.Equally, in ambient light HL, to compared with the 2nd S12 of leaded light prism 10+part of X side incident, namely, to the part of relative prism 50 incidents, by when the 3rd transmission plane S53 of this setting and the 1st transmission plane S51, positive negative power offsets, and aberration is corrected.In a word, observer observes across relative prism 50 external world's picture that distortion is few.And in ambient light HL, to the part of relative prism 50 incidents corresponding with the 2nd S12 of leaded light prism 10, during by the 3rd transmission plane S53 and the 1st S11, positive negative power offsets, and aberration is corrected.In a word, observer observes across leaded light prism 10 and relative prism 50 external world's picture that distortion is few.Moreover the 2nd S12 of leaded light prism 10 and the 2nd transmission plane S52 of relative prism 50 have substantially same curve form, all have substantially same refractive index, both gaps are filled by the junction surface 60 of substantially same refractive index.In a word, the 2nd S12 of leaded light prism 10 and the 2nd transmission plane S52 of relative prism 50, not work as plane of refraction for ambient light HL.
But, because the ambient light HL to 15 incident of semi-transparent semi-reflecting lens layer partly sees through the partly reflection on one side of this semi-transparent semi-reflecting lens layer 15 on one side, so weaken corresponding to the transmissivity of semi-transparent semi-reflecting lens layer 15 from the ambient light HL of the direction corresponding with semi-transparent semi-reflecting lens layer 15.On the other hand, because image light GL is from the direction incident corresponding with semi-transparent semi-reflecting lens layer 15, so observer can observe the image and the extraneous picture that form on image display element 82 in the direction of semi-transparent semi-reflecting lens layer 15.Structure about the periphery of semi-transparent semi-reflecting lens layer 15 elaborates after a while, but, due to clip semi-transparent semi-reflecting lens layer 15 leaded light prism 10 the 2nd S12 and relatively between the 2nd transmission plane S52 of prism 50, become the state of filling to remove bubble by transparent junction surface 60, so also keep well at the periphery of semi-transparent semi-reflecting lens layer 15 state penetrating.
Moreover, in the interior propagation of leaded light prism 10 and in the image light GL of the 2nd S12 incident, the light not reflected by semi-transparent semi-reflecting lens layer 15 to the interior incident of relative prism 50, and prevent from returning to leaded light prism 10 by the anti-stop of not shown reflection that is arranged at relative prism 50.In a word, prevent from light path, returning and becoming diffused light by the image light GL of the 2nd S12.Further, from relative prism 50 side incidents the ambient light HL that reflected by semi-transparent semi-reflecting lens layer 15, to relative prism 50, return, and prevent from penetrating to leaded light prism 10 by the above-mentioned anti-stop of not shown reflection that is arranged at relative prism 50.In a word, prevent that the ambient light HL being reflected by semi-transparent semi-reflecting lens layer 15 from returning and becoming diffused light in light path.
D. the structure of the bonding part of guiding device
Below, with reference to Fig. 4 (A) etc., describe in guiding device 20 the particularly structure of the leaded light prism 10 based on junction surface 60 and the bonding part of relative prism 50 in detail.
In guiding device 20, as the 2nd S12 of the composition surface JS of leaded light prism 10, to compare with the 2nd transmission plane S52 of the opposite face PS as relative prism 50, curvature is larger, and radius-of-curvature is less.Thus, as shown in the figure, the 2nd S12 and the 2nd transmission plane S52, become the closer near the perimeter sides the 1st S11 and/or the 3rd S13 and/or side 10e, 10f, more away from each other the shape of (distance become large) each other.More specifically, as part is amplified diagram, if the residual quantity that is distance for the size of mutual distance that accompanies under the state at junction surface 60 the 2nd S12 and the 2nd transmission plane S52 is residual quantity d, this residual quantity d slowly increases towards perimeter sides.Moreover this residual quantity d is equivalent to the thickness in each position at junction surface 60.Here, especially, become the curve form of the 2nd S12 benchmark initial point OX with make the minimum position MN of residual quantity d minimum in the 2nd point above S12 consistent.In a word, become along with from initial point OX away from and the dull shape increasing of residual quantity d.Moreover when the joint of leaded light prism 10 and relative prism 50, the coating position FP (initial stage coating position FP) that become the plastering agent at junction surface 60 becomes the position corresponding with initial point OX.Also have, as the initial point OX of coating position FP (initial stage coating position FP) in all region QA as fit area JD with the scope of the overlapping subregion PA of semi-transparent semi-reflecting lens layer 15 in, in more detail, be the central portion of all region QA or subregion PA.
Here, in order to make as the 2nd S12 of composition surface JS and as the relative position relation of the 2nd transmission plane S52 of opposite face PS as described above, need to adjust the shape of each surperficial S12, S52.But in such face S12, S52, the 2nd S12, from guaranteeing that the reflection direction of image light GL is the viewpoint of appropriate state, takes relative restriction for face shape.To this, the 2nd transmission plane S52 is in order middle diopter to be remained on to roughly 0 state seeing through of ambient light, and the 2nd S12 between keep not producing the state of bubble etc.And, in present embodiment, due to and the 2nd S12 between the junction surface 60 that accompanies by the plastering agent of roughly the same refractive index, form, as long as so have be formed for the shape of filling the gap of this plastering agent in the engaging of the 2nd S12 with the state of expecting, the precision of the face shape of optics is not problem.Therefore, for the 2nd S12 with the curvature working as the reflecting surface of image light GL, by making the slightly large adjustment of curvature of the 2nd S12 of ratio of curvature of the 2nd transmission plane S52, the mobile control that can make its formation will become the plastering agent at junction surface 60 is the fit area JD of the state expected.
Below, by Fig. 4 (A) and Fig. 4 (B) and/or Fig. 5 (A) and Fig. 5 (B), about the formation region of the shape at junction surface 60 being carried out to definite junction surface 60, if fit area JD that in other words, become the plastering agent at junction surface 60 etc. is described in more detail.Moreover Fig. 4 (A) is a sectional drawing that represents the structure of guiding device 20, be to be the sectional drawing of horizontal direction about the reference field SR parallel with XZ face in the front view shown in Fig. 4 (B).Further, Fig. 5 (A) is the sectional drawing from the other direction of the structure of expression guiding device 20, is to be the sectional drawing of vertical direction about face SQ parallel with YZ aspect and that comprise initial point OX in the front view shown in Fig. 5 (B).
First, as shown in Fig. 4 (A) and Fig. 4 (B), junction surface 60 is formed on all region QA of the 2nd S12 expansion.In a word, the fit area JD (adhesion scope) at the formation junction surface 60 on the 2nd S12 equals all region QA.All region QA delimit by the width Lx of the transverse direction (horizontal direction) of the curved surface about along the 2nd S12 with about the width Ly of longitudinal (vertical direction) as Y-direction.If in other words, in the JD of fit area, width Ly be about as carry out image reflection of light fully reflecting surface the 3rd S13 and as the width of the intersection direction (vertical direction) of the 2nd S12 of composition surface JS, width Lx is about the width that this is become to vertical direction (horizontal direction).Moreover in illustrated occasion, width Ly is larger than width Lx.In a word, in all region QA, about the direction of width Ly, be longitudinally long side direction, about the direction of width Lx, be that transverse direction is short side direction.In this occasion, the all region QA as fit area JD (adhesion scope) on the 2nd S12 fill in the time of will becoming the plastering agent at junction surface 60, in order to make plastering agent remnants not obvious after joint, expect plastering agent easily the sight line about observer less towards above-below direction be the Directional Extension of width Ly.Therefore,, in present embodiment, about the 2nd S12 as composition surface JS with as the 2nd transmission plane S52 of opposite face PS, become the higher shape of Magnification about the direction of width Ly compared with the Magnification of residual quantity d and the direction of width Lx.Particularly, residual quantity in the direction of extending about width Lx as shown in Fig. 4 (A) is residual quantity dx, the residual quantity of the direction of extending about width Ly as shown in Fig. 5 (A) and Fig. 5 (B) is the occasion of residual quantity dy, and then, at the Magnification of the residual quantity about all directions, be the occasion of Δ dx/ Δ Lx, Δ dy/ Δ Ly, by forming
Δdy/ΔLy>Δdx/ΔLx
Such shape, can make the plussage of plastering agent more about vertical direction compared with horizontal direction, and after joint, plastering agent remnants are not obvious.Moreover, in illustrated occasion, for intersection direction, become vertical direction (horizontal direction) and become short side direction, intersection direction (vertical direction) becomes long side direction, becomes compared with Magnification to short side direction to the larger shape of the Magnification of long side direction.Therefore,, in the step of filling to fit area JD at pushing plastering agent, to long side direction, push more plastering agent and can make plastering agent spread all over to be filled in fit area JD.
Moreover in illustrated occasion, in junction surface 60, the width H1 of the end T1 of the side of close observer's eye EY is larger than the width H2 of the end T2 away from side.In a word, about the residual quantity d of the thickness as junction surface 60, the thickness of the Thickness Ratio end T2 side of end T1 side is larger.Side near eye EY is easily fuzzy to observer, even if therefore relatively increase the width at junction surface 60, also more difficult outstanding.In this occasion, by increasing end T1 side, in engagement step, can be in order to push and will to become the plastering agent at junction surface 60 and guarantee sufficient region equably.
Here, as mentioned before, in order to keep well, penetrate, when the joint of leaded light prism 10 and relative prism 50, that suppresses bubble becomes extremely important, still, if basic material is resin material, the rough surface resulting from based on foozle for surface configuration etc. produces spot in the fill method of plastering agent, easily gassing.To this, in present embodiment, by leaded light prism 10, there is above-mentioned shape with relative prism 50, be suppressed in the filling step of plastering agent CC and produce bubble.
E. the making step of guiding device
Below, with reference to Fig. 6 (A)～Fig. 6 (C) etc., centered by the filling step of the plastering agent CC that will become junction surface 60 in the making step of guiding device 20, each step is described.Moreover in the example of Fig. 6 (A)～Fig. 6 (C) etc., becoming the coated face take the 2nd S12 as the initial stage in the 2nd S12 of binding face of plastering agent CC and the 2nd transmission plane S52, that is, the 2nd S12 side becomes gravity downside.Also matching with it is in the drawings described as be at paper downside and has the leaded light prism 10 that comprises the 2nd S12, and side has the relative prism 50 that comprises the 2nd transmission plane S52 on paper.
First, as shown in Fig. 6 (A), on the 2nd S12 by the environs centered by initial point OX as coating position FP (initial stage coating position FP), coating plastering agent CC (plastering agent application step).In a word, the coating position FP of coating plastering agent CC (initial stage coating position FP) becomes with making leaded light prism 10 and the residual quantity d of the distance of relative prism 50 in junction surface 60 under the state completing and becomes the corresponding position of minimum minimum position MN.Secondly, as shown in Fig. 6 (B), by using coating position FP (initial stage coating position FP) as center using the position of initial point OX as center, the 2nd transmission plane S52 by the 2nd S12 and relative prism 50 clips under the state of plastering agent CC, from two sides S12, the direction pushing that S52 represents to arrow A A, make plastering agent CC expansion, as shown in Fig. 6 (C), in all region QA of the 2nd S12 as fit area JD, comprise the jump part being produced by the semi-transparent semi-reflecting lens layer 15 of film forming on the 2nd S12, spread all over and do not stay gap and fill (plastering agent filling step).Moreover, more than, in plastering agent application step, the coating weight of plastering agent CC expection will become the volume that the part at junction surface 60 takies and be made as in advance quantitatively, for example, by considering foozle to carry out slightly overbrushing cloth, can not produce deficiency, suitably remove the plastering agent CC of the surplus of exposing from end.By make plastering agent CC sclerosis under the state of plastering agent CC of having removed surplus, by plastering agent CC, form junction surface 60 (junction surface forms step), make guiding device 20.Moreover, more than, due to the 2nd coated face that S12 is the initial stage, so coating position FP (initial stage coating position FP) is on the 2nd S12, for example, but coating position FP (initial stage coating position FP) is the position corresponding with minimum position MN,, also coated face that can be take the 2nd transmission plane S52 as the initial stage, coating position FP (initial stage coating position FP) is on the 2nd transmission plane S52.
Below, with reference to Fig. 7 (A)～7 (D), the extended mode of plastering agent CC in the making step of guiding device 20 is described.Moreover as shown in the figure, the scope that plastering agent CC takies is region QQ.As shown in Fig. 7 (A), the plastering agent CC being coated with in the scope of coating position FP included centered by initial point OX (initial stage coating position FP), as shown in Fig. 7 (B), by the 2nd S12 of the leaded light prism 10 as composition surface JS, clipped with the 2nd transmission plane S52 of the relative prism 50 as opposite face PS.Secondly, as shown in Fig. 7 (C), by pressing leaded light prism 10 and relative prism 50, can push plastering agent CC, and at this moment, as mentioned before, because the 2nd S12 and the 2nd transmission plane S52 have the residual quantity making between two sides, from minimum position MN, be the initial point OX dull shape increasing laterally, so represent that the region QQ of the extended mode of plastering agent CC becomes the shape of stable expansion equably and similarly slowly laterally from initial point OX.And therefore, the shape of region QQ becomes the elliptical shape long about the Y-direction as long side direction.Thus, as shown in Fig. 7 (D), the region QQ of plastering agent CC spread all over to whole expansions of all region QA.
To this, comparative example as shown in Fig. 8 (A)～8 (D), do not become along with the initial point OX from as minimum position MN away from and the occasion of the dull shape increasing, as shown in Fig. 8 (A), even at central portion coating plastering agent CC, can not there is identical extended mode yet, for example with the extended mode as shown in Fig. 8 (B), there is deviation, the region BBa of the origin that becomes bubble shown in Fig. 8 (C), the air staying in the slow part of the expansion of plastering agent CC, final as shown in Fig. 8 (D), by plastering agent CC, surround and do not have place to escape, become bubble BB.
As more than, in the guiding device 20 of virtual image display apparatus 100 that is applicable to present embodiment, as the 2nd S12 of the composition surface JS of leaded light prism 10 with as the 2nd transmission plane S52 of the opposite face PS of relative prism 50, become the residual quantity d that makes the mutual distance that accompanies junction surface 60 along with the initial point OX from as minimum position MN away from and the shape of dull increase.Thus, in the formation at junction surface 60, if will become the plastering agent CC at junction surface 60 with coating position FP that in the JD of fit area, minimum position MN is corresponding (initial stage coating position FP) coating, and push be coated with plastering agent CC while form the part that will become junction surface 60, plastering agent CC, from the coating position FP corresponding with minimum position MN (initial stage coating position FP) slowly uniform and stable expansion laterally, can suppress the generation of bubble thus.Therefore, at the junction surface 60 completing, be between leaded light prism 10 and relative prism 50, can guarantee good penetration performance.
Further, above, by hard conating, apply leaded light prism 10 and/or prism 50 relatively, and, for example in leaded light prism 10 as the 6th S16 of light entrance face, can and then be applied from the top of hard conating by antireflection film.
Further, more than the interval of the 1st of leaded light prism 10 the S11 and the 3rd S13 becomes 5mm and below 15mm.Further, more than the 2nd S12 becomes 20 ° with respect to the inclination angle of the 1st S11 and below 40 °.
Further, about the 4th S14 or the 5th S15 of leaded light prism 10, be to arrange for the adjustment of light path and/or the more accurate correction of aberration, can consider the specification etc. of projection arrangement for perspective 70 and omit.
Further, as above-mentioned, as the formation in the 2nd S12 with semi-transparent semi-reflecting lens layer 15, still, also can replace this semi-transparent semi-reflecting lens layer 15, by making hologram film forming carry out image formation.
The 2nd embodiment
Below, the guiding device that the 2nd embodiment relates to and the virtual image display apparatus that uses it are described.Moreover, the guiding device that present embodiment relates to and to use its virtual image display apparatus be the variation of the guiding device 20 that relates to such as the 1st embodiment and the virtual image display apparatus 100 that uses it, be used to form the structure difference of the optical system of image, but, about the structure at junction surface 60, with the guiding device 20 of the expression such as the 1st embodiment and use its occasion of virtual image display apparatus 100 identical, therefore only explanation is used to form the optical system of image and the explanation of omitting other.
Fig. 9 (A) and Fig. 9 (B) are the vertical views of the virtual image display apparatus that relates to of present embodiment.The 1st display device 100A of the virtual image display apparatus 100 that as shown, present embodiment relates to possesses: projection arrangement for perspective 70 and image display device 80.Wherein, projection arrangement for perspective 70 possesses: as the leaded light prism 10 of light guide member, relative prism 50 and projection lens 30, leaded light prism 10 forms guiding device 20 with relative prism 50.Moreover, in the virtual image display apparatus 100 that present embodiment relates to, become image light GL in projection arrangement for perspective 70 and in leaded light prism 10, do not form intermediary image, in projection lens 30, penetrate parallel beam, the optical system that in guiding device 20, it is maintained and is penetrated, about above this point, different from above-mentioned other embodiment.
Guiding device 20 engages leaded light prism 10 to form with relative prism 50, the flat optics extending in parallel as all formations and XY face.
In guiding device 20, leaded light prism 10 is overlooked as trapezoidal parts, has: the 1st SS11, the 4th SS14 and the 6th SS16 are shared to common surface 21a, the 2nd SS12, the 3rd SS13, the 5th SS15 that form.Parallel with the optical axis AXO by the 2nd SS12 by the optical axis AXI of the 5th SS15.Because each of leaded light prism 10 is for plane does not have magnification, maintain the state of the parallel beam penetrating from projection lens 30.
Light incident section B1 is the specular part of triangular prism, have as the light entrance face of a part of common surface 21a the 6th SS16, with the 6th the 5th SS15 that SS16 is relative.The 5th SS15 with respect to the optical axis AXI of projection lens 30 or XY face for example with sharp angle α=25 °～27 ° of inclinations, by by from the 6th SS16 incident all towards the image light GL of+Z direction be bent into universally towards partially-Z direction-directions X, image light GL is attached in light guide section B2 reliably.
Light guide section B2 possesses common surface 21a and 3rd SS13 of respectively total reflection by the image light GL of light incident section B1 bending, as toward each other and 2 planes that extend in parallel with XY face.
The image light GL being reflected by the 5th SS15 of light incident section B1, first, to the 4th SS14 incident of the part as common surface 21a, and total reflection.Secondly, this image light GL, to the 3rd SS13 incident, and total reflection.This action is carried out repeatedly below, thus image light GL be all directed to the leading light direction of the inner side of guiding device 20 arrange light injection part B3+X side.
Light injection part B3 is the specular part of triangular prism, have the 1st SS11 also working as light emergence face as a part of common surface 21a, with the 1st the 2nd SS12 that SS11 is relative.The 1st SS11 is the inner side plane that penetrates image light GL for the eye EY to observer, same with the 6th SS16, becomes a part of common surface 21a, extend vertical with optical axis AXO.The tabular surface of the 2nd SS12 rectangle, has semi-transparent semi-reflecting lens layer 15.
The 2nd SS12 with respect to the optical axis AXO vertical with common surface 21a or XY face for example with sharp angle α=25 °～27 ° of inclinations.
Relatively prism 50 and leaded light prism 10, both bonding part and near, form the B4 of perspective portion.
In the occasion of present embodiment, by become the residual quantity d that makes the mutual distance that accompanies junction surface 60 along with the initial point OX from as minimum position MN away from and the dull shape increasing also can suppress the generation of bubble, guarantee good penetration performance.Moreover, in the occasion of present embodiment, as part, amplify and represent, because be the structure take the 2nd SS12 as composition surface JS as tabular surface, so for example, the shape of the 2nd transmission plane S52 of relative prism 50 is become with respect to the 2nd the slight curving shape of SS12, can make the state for expecting that is varied to of residual quantity d.
Other
By each embodiment, the utility model has been described above, still, the utility model is not limited to above-mentioned embodiment, in the scope within its purport, can implement in every way, for example, also can carry out as following distortion.
In above-mentioned explanation, residual quantity d is that minimum minimum position MN is consistent with initial point OX on the 2nd S12, but for this point, as shown in figure 10, and the position that minimum position MN departs from from initial point OX among also can be on the 2nd S12.
Also have, as shown in Figure 11 (A) and 11 (B), in the 2nd S12 of the composition surface JS as leaded light prism 10 and the 2nd transmission plane S52 as the opposite face PS of relative prism 50, minimum position MN also can be arranged at the end TP of fit area JD.Moreover in illustrated occasion, minimum position MN is outside the scope of subregion PA that forms semi-transparent semi-reflecting lens layer 15.
Also have, in above-mentioned embodiment, guiding device 20 becomes all such formations of front of the eye EY that hides wearer, but, be not limited to this, for example, as shown in Figure 12 (A) and 12 (B), comprise as the guiding device 20 of the 2nd S12 of the curve form with semi-transparent semi-reflecting lens layer 15 and also can become a part that only hides eye EY, hide a part at the moment, as the small-sized formation that has the part not hiding.Further, in this occasion, even if be made as by guiding device 20 is diminished fully, guiding device 20 is not penetrated, replace semi-transparent semi-reflecting lens layer 15 and the formation of the mirror of total reflection is carried out in configuration, wearer also can be from surrounding's observation external world of guiding device 20.Moreover, in illustrated occasion, the whole of the 2nd S12 or roughly all form semi-transparent semi-reflecting lens layer 15, still, also can only in a part of the 2nd S12, form semi-transparent semi-reflecting lens layer 15.Also have, in the example of Figure 12 (B), the semi-transparent semi-reflecting lens layer 15 of guiding device 20 is configured in the roughly positive of an EY, still, also the configuration of the semi-transparent semi-reflecting lens layer 15 of guiding device 20 can being staggered from front, can carry out visual confirmation to image by mobile sight line.For example, also can reduce slightly the position (improving slightly the position of guiding device 20) of an EY.In this occasion, for example, become the state that the Lower Half of an EY can be seen from the below of guiding device 20.
Further, in addition, also can before the guiding device 20 in expressions such as for example the 1st embodiments, apply shade, adjust the transmissivity of ambient light and change the state penetrating, for example, interdict ambient light completely.
In above-mentioned explanation, semi-transparent semi-reflecting lens layer (Transflective film) 15 is formed at the rectangular area of growing crosswise, and still, the profile of semi-transparent semi-reflecting lens layer 15 can suitably change according to purposes and other service condition.Further, the transmissivity of semi-transparent semi-reflecting lens layer 15 and/or reflectivity also can be according to purposes and other changes.
In above-mentioned explanation, the main part of prism 50 and the prism main body 10s of leaded light prism 10 are formed by the thermoplastic resin material with roughly the same refractive index relatively, junction surface 60 is also to be formed by the material with the refractive index roughly the same with them, but, as a concrete example, the refractive index of plastering agent CC that become junction surface 60 with the difference of refractive index of resin material that forms the main part of relative prism 50 and/or the prism main body 10s of leaded light prism 10 in ± 0.05.Thus, can suppress fully because junction surface 60 is for leaded light prism 10 and/or distortion that relatively refringence of prism 50 causes.
In above-mentioned explanation, do not adjust especially the distribution of the display brightness of image display element 82, still, in the occasion etc. that produces luminance difference according to position, can adjust unevenly the distribution of display brightness.
In above-mentioned explanation, as image display device 80, use the image display element 82 being formed by the liquid crystal display of transmission-type etc., still, as image display device 80, also can be not limited to the image display element 82 being formed by the liquid crystal display of transmission-type etc. and use various device.For example, can be also the formation of liquid crystal display of using reflection-type, also can replace the image display element 82 that form by liquid crystal display etc. and employing Digital Micromirror Device etc.Further, as image display device 80, also can use the emissive type element of the representatives such as LED array and/or OLED (organic EL).
In above-mentioned explanation, the virtual image display apparatus 100 that possesses a pair of display device 100A, 100B being described, still, can be single display device.In a word, also can be not corresponding with the both sides of right eye and left eye, projection arrangement for perspective 70 and image display device 80 are set a group by a group, but only for the either party of right eye or left eye, projection arrangement for perspective 70 and image display device 80 are set, form the formation of monocular vision image.
In above-mentioned explanation, the interval of the directions X of a pair of display device 100A, 100B is not described, and the interval of two display device 100A, 100B is not limited to fixed intervals, can carries out by mechanical mechanism etc. the adjustment at interval.In a word, the interval of the directions X of two display device 100A, 100B can be according to wearer's the eye adjustment such as wide.
In above-mentioned explanation, semi-transparent semi-reflecting lens layer 15 is films (for example metallic reflective coating and/or dielectric multilayer film) of simple half transmitting, and still, semi-transparent semi-reflecting lens layer 15 can replace with the hologram of plane or curved surface.
In above-mentioned explanation, understand that specifically virtual image display apparatus 100 is head mounted displays, can in head mounted display, be suitable for guiding device 20, still, guiding device 20 also can be applicable to HUD.And, also can in finder optical system, apply guiding device 20.
In above-mentioned explanation, for example in the 1st embodiment in the 1st S11 and the 3rd S13 of leaded light prism 10, do not apply from the teeth outwards mirror and/or semi-transparent semi-reflecting lens etc. and by image light total reflection being guided with the interface of air, but, in the total reflection of virtual image display apparatus 100 of the present utility model, be also included in all or part of on the 1st S11 or the 3rd S13 form mirror coating and/or, the reflection carried out as the semi-transparent semi-reflecting lens layer of semi-transparent semi-reflecting lens film.For example, also comprise following occasion: at the incident angle of image light, meet on the basis of total reflection condition, at all or part of of above-mentioned the 1st S11 or the 3rd S13, apply mirror coating etc., reflect in fact whole image light.Further, if can obtain the image light of abundant brightness, also can apply all or part of of the 1st S11 or the 3rd S13 by thering is radioparent mirror more or less.
In above-mentioned explanation, the transverse direction that leaded light prism 10 grades are arranged at eye EY extends, but also can be configured to, and leaded light prism 10 is extended at longitudinal direction.
Claims (14)
1. a guiding device, is characterized in that, comprising:
Leaded light prism, has the composition surface of supporting mirror layer, and this mirror layer carries out the image reflection of light at internal communication;
Relatively prism, has and the opposite face of the relative configuration in above-mentioned composition surface in above-mentioned leaded light prism, and between above-mentioned composition surface and above-mentioned opposite face, configures and engage above-mentioned mirror layer;
Junction surface, is formed at the fit area of the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism, and above-mentioned leaded light prism is engaged with above-mentioned relative prism by plastering agent;
Wherein, above-mentioned guiding device visuognosis image light;
Wherein, the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism become clip residual quantity that above-mentioned junction surface makes mutual distance along with the minimum position from predetermined away from and the shape that increases.
2. guiding device as claimed in claim 1, is characterized in that, in above-mentioned leaded light prism, above-mentioned mirror layer is the semi-transparent semi-reflecting lens layer that carries out the reflection of part of image light and the transmission of the part of ambient light.
3. guiding device as claimed in claim 1, it is characterized in that, the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism become make above-mentioned predetermined minimum position be arranged in above-mentioned fit area with the scope of above-mentioned mirror ply in shape.
4. guiding device as claimed in claim 1, is characterized in that, the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism become makes above-mentioned predetermined minimum position be arranged at the shape of the central portion at above-mentioned junction surface.
5. guiding device as claimed in claim 1, is characterized in that, the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism become makes above-mentioned predetermined minimum position be arranged at the shape of the end of above-mentioned fit area.
6. guiding device as claimed in claim 1, is characterized in that, the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism are respectively curve forms.
7. guiding device as claimed in claim 6, is characterized in that, the above-mentioned composition surface of above-mentioned leaded light prism is to compare the curve form with less radius-of-curvature with the radius-of-curvature of the above-mentioned opposite face of above-mentioned relative prism.
8. guiding device as claimed in claim 1, it is characterized in that, the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism become following shape: about the residual quantity of mutual distance that accompanies above-mentioned junction surface, along above-mentioned composition surface, with to comparing for the Magnification that carries out the fully reflecting surface of image reflection of light and the intersection direction on above-mentioned composition surface and become vertical direction, higher to the Magnification of the intersection direction on above-mentioned fully reflecting surface and above-mentioned composition surface.
9. guiding device as claimed in claim 1, it is characterized in that, the above-mentioned composition surface of above-mentioned leaded light prism and the above-mentioned opposite face of above-mentioned relative prism become following shape: about the residual quantity of mutual distance that accompanies above-mentioned junction surface, form in the fit area at above-mentioned junction surface near the Thickness Ratio of the end of observer's side larger away from the thickness of the end of side.
10. guiding device as claimed in claim 1, is characterized in that, above-mentioned leaded light prism is formed by resin material respectively with above-mentioned relative prism.
11. guiding devices as claimed in claim 10, is characterized in that, the difference of the refractive index of above-mentioned plastering agent and the refractive index of above-mentioned resin material is in ± 0.05.
12. guiding devices as claimed in claim 1, is characterized in that,
Above-mentioned leaded light prism comprises 3 above light guiding surfaces to inside guiding image light;
When forming in multiple light guiding surfaces of above-mentioned leaded light prism the 1st and the 3rd facial vision identification external world, diopter is roughly 0;
On the 2nd of configuration between above-mentioned the 1st and above-mentioned the 3rd, form above-mentioned mirror layer;
Above-mentioned the 1st and the above-mentioned the 3rd regard to observation side and become concave;
Above-mentioned leaded light prism makes image light by above-mentioned the 3rd total reflection, and by above-mentioned the 1st total reflection, after above-mentioned the 2nd reflection, above-mentioned the 1st of transmission, arrives observation side.
13. guiding devices as claimed in claim 1, is characterized in that, above-mentioned leaded light prism and above-mentioned relative prism, make to be roughly 0 for the diopter of ambient light, and ambient light and image light are pointed out to observer overlappingly.
14. 1 kinds of virtual image display apparatus, is characterized in that, comprising:
Guiding device as described in any one in claim 1 to 13;
Produce the image display element of image light; With
Make the projection lens penetrating towards above-mentioned guiding device from the image light of above-mentioned image display element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012180798A JP5998738B2 (en) | 2012-08-17 | 2012-08-17 | Light guide device, virtual image display device, and method of manufacturing light guide device |
| JP180798/2012 | 2012-08-17 |
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| Publication Number | Publication Date |
|---|---|
| CN203587827U true CN203587827U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320503208.6U Expired - Lifetime CN203587827U (en) | 2012-08-17 | 2013-08-16 | Light guide device and virtual image display device |
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| Country | Link |
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| JP (1) | JP5998738B2 (en) |
| CN (1) | CN203587827U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104570354A (en) * | 2015-01-09 | 2015-04-29 | 京东方科技集团股份有限公司 | Interactive glasses and visitor guide system |
| CN105676453A (en) * | 2014-12-03 | 2016-06-15 | 光旴科技股份有限公司 | Optical system capable of displaying motion information image and display device thereof |
| CN106814413A (en) * | 2015-11-27 | 2017-06-09 | 宁波长阳科技股份有限公司 | A kind of brightness enhancement film and preparation method thereof |
| CN108693648A (en) * | 2017-03-29 | 2018-10-23 | 精工爱普生株式会社 | Image display device |
| US10317215B2 (en) | 2015-01-09 | 2019-06-11 | Boe Technology Group Co., Ltd. | Interactive glasses and navigation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014222260A (en) | 2013-05-13 | 2014-11-27 | セイコーエプソン株式会社 | Optical element, display device, and method for manufacturing optical element |
| JP6488870B2 (en) * | 2015-05-12 | 2019-03-27 | コニカミノルタ株式会社 | Manufacturing method of optical lens |
| JP6852501B2 (en) * | 2017-03-28 | 2021-03-31 | セイコーエプソン株式会社 | Display device |
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|---|---|---|---|---|
| US5880888A (en) * | 1989-01-23 | 1999-03-09 | Hughes Aircraft Company | Helmet mounted display system |
| JP3068641B2 (en) * | 1990-11-02 | 2000-07-24 | 旭光学工業株式会社 | Bonding resin lens |
| JP3720464B2 (en) * | 1995-07-03 | 2005-11-30 | キヤノン株式会社 | Optical element and observation system using the same |
| JP2004029544A (en) * | 2002-06-27 | 2004-01-29 | Nikon Corp | Hologram combiner optical system and information display device |
| JP2010008901A (en) * | 2008-06-30 | 2010-01-14 | Fujitsu Ltd | Adhesion face structure of optical component |
| JP5567924B2 (en) * | 2010-07-27 | 2014-08-06 | オリンパス株式会社 | Prism optical system, image display device using prism optical system, and imaging device using prism optical system |
-
2012
- 2012-08-17 JP JP2012180798A patent/JP5998738B2/en active Active
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- 2013-08-16 CN CN201320503208.6U patent/CN203587827U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676453A (en) * | 2014-12-03 | 2016-06-15 | 光旴科技股份有限公司 | Optical system capable of displaying motion information image and display device thereof |
| CN104570354A (en) * | 2015-01-09 | 2015-04-29 | 京东方科技集团股份有限公司 | Interactive glasses and visitor guide system |
| US10317215B2 (en) | 2015-01-09 | 2019-06-11 | Boe Technology Group Co., Ltd. | Interactive glasses and navigation system |
| CN106814413A (en) * | 2015-11-27 | 2017-06-09 | 宁波长阳科技股份有限公司 | A kind of brightness enhancement film and preparation method thereof |
| CN106814413B (en) * | 2015-11-27 | 2019-07-09 | 宁波长阳科技股份有限公司 | A kind of brightness enhancement film and preparation method thereof |
| CN108693648A (en) * | 2017-03-29 | 2018-10-23 | 精工爱普生株式会社 | Image display device |
| CN108693648B (en) * | 2017-03-29 | 2022-08-02 | 精工爱普生株式会社 | Image display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014038227A (en) | 2014-02-27 |
| JP5998738B2 (en) | 2016-09-28 |
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