WO2008156675A1 - Système de visualisation pour visiocasque à réalité accrue - Google Patents

Système de visualisation pour visiocasque à réalité accrue Download PDF

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Publication number
WO2008156675A1
WO2008156675A1 PCT/US2008/007409 US2008007409W WO2008156675A1 WO 2008156675 A1 WO2008156675 A1 WO 2008156675A1 US 2008007409 W US2008007409 W US 2008007409W WO 2008156675 A1 WO2008156675 A1 WO 2008156675A1
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WO
WIPO (PCT)
Prior art keywords
user
image
eye
projected image
mounted display
Prior art date
Application number
PCT/US2008/007409
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English (en)
Other versions
WO2008156675A8 (fr
Inventor
Anthony Vitale
James A. Carter, Iii
Original Assignee
Anthony Vitale
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/762,171 external-priority patent/US20080309586A1/en
Application filed by Anthony Vitale filed Critical Anthony Vitale
Publication of WO2008156675A1 publication Critical patent/WO2008156675A1/fr
Publication of WO2008156675A8 publication Critical patent/WO2008156675A8/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings

Definitions

  • the present invention relates to a viewing and display system and method using lenses with rotationally symmetric aspheric surfaces permitting a projected image to be focused by the lens system and an elliptical pupil relay on a user's eye (at the pupil or in the center of the eye).
  • This system permits augmented viewing of the ambient environment, or display of a projected image, via a head mounted system.
  • the head mounted system may be configured as glasses, goggles, a head piece or helmet.
  • the image projector preferably an OLED or silicon light emitting diode (LED)
  • Another object of the invention places the projector and lens combination at an outboard position with respect to the user's eye, that is, a position away from the bridge of the user's nose.
  • One embodiment of the present invention is a method of viewing a projected image with a head mounted display worn by a user.
  • the method focuses a projected image with rotationally symmetric aspheric lenses and uses an ellipsoid as a pupil relay as part of the head mounted display.
  • the image is projected at a first foci of the ellipsoid relay through the lenses.
  • the ellipsoid relay focuses the optically pre-processed image at a second foci of the ellipsoid wherein the second foci is at or near (i) a pupil of the user's eye, or (ii) a center of the user's eye.
  • the rotationally symmetric aspheric lenses focus or refract the projected image through either a three or a two lens element adjacent the first foci.
  • the projected image is created by an organic light emitting diode (OLED or silicon light emitting diode (LED)) adjacent a three lens element system at an outboard position with respect to the user's eye, that is, a position away from the bridge of the user's nose.
  • OLED organic light emitting diode
  • LED silicon light emitting diode
  • the image projector and focusing lens system and the ellipsoid pupil relay are correctly positioned on the head of the user by a head mount system which may be goggles or eye glasses, or screens or shields depending from a head piece or helmet worn by the user.
  • a head mount system which may be goggles or eye glasses, or screens or shields depending from a head piece or helmet worn by the user.
  • the viewing system for a head mount display is worn by a user and is mounted on or about the bridge of a user's nose such that image projector unit emitters are a predetermined distance away from reflector screens which direct optical images into respective ones of the user's eyes.
  • the head mount (eye glasses, goggles, head piece or helmet) specially mounts each emitter unit, left and right for the left and right eyes respectively, a predetermined distance away from a corresponding reflector screen.
  • Each emitter unit is coupled to an image generator via a signal line. An optical image is emitted or projected from the emitter unit.
  • the emitter unit has a plurality of emitters configured in a semi or hemispherical manner to emit an optical image substantially radially towards the corresponding reflector screen.
  • each reflector screen is a semi or hemispherical reflector with a plurality of discrete reflection surfaces. Each discrete reflection surface reflects a portion of the optical image at a discrete angle such that the optical image from the emitter unit is directed into the user's eye.
  • the reflector screen is an ellipse and the reflection surface need not have discrete reflection surfaces or facets since the ellipsoid reflector is positioned such that one foci of the ellipse is at the radial center point of the emitters and the other foci of the ellipse is at either the cornea of the eye or at the optical center of the eye.
  • FIG. IA diagrammatically illustrates the method and the system wherein the image projector and focus lens unit is outboard of the user's eye, at the first foci of the ellipsoid, and the user's pupil or eye center is at the second foci of the elliptical reflector or relay (full or partial reflection is permitted)(FIG. I A is a top view of the viewing system);
  • FIG. 1 B diagrammatically illustrates the focal point on or in the user's eye for the viewing system
  • FIG. 2 diagrammatically illustrates a side view of the method and the system wherein the image projector and focus lens unit is outboard of the user's eye;
  • FIG.3 diagrammatically illustrates the outboard position of the image projector and focus lens unit, the user's nose and diagrammatically illustrates the ellipsoidal pupil relay;
  • FIG.4 diagrammatically illustrates the other major components of the outboard viewing system
  • FIGs. 5A, 5B and 5C show Table A - the User Defined Surfaces
  • FIGs.6A and 6B diagrammatically illustrate a focal system with a two lens focal system defining two non-rotational Iy symmetric aspheric surfaces with the use of an ellipsoid as a pupil relay (FIG. 6A is a top view and FIG. 6B is a detail of the curved image projector and two lens system);
  • FIG. 6C and shapes 1 - 6 therein diagrammatically illustrate shapes of the image projector surface
  • FIGs. 7A, 7B and 7C show Table B - the User Defined Surfaces
  • FIG. 8 diagrammatically illustrates another embodiment of the invention wherein the image projector or emitters (plus the focusing lens systems) are inboard the user's eyes and the projected image is further focused by reflector screens;
  • FIGS.9A and 9B diagrammatically illustrate the reflector screens and emitter units mounted on glasses or goggles and diagrammatically illustrate a helmet or head piece with depending reflector screens (eye shields);
  • FIG. 10 diagrammatically illustrates one optical operation of the system
  • FIG. 1 1 diagrammatically illustrates one technique for focusing collimated light
  • FIG. 12 diagrammatically illustrates the plurality of emitter units on the semi or hemispherical emitter unit
  • FIGS. 13A and 13B diagrammatically illustrate emitter unit and discrete reflection surfaces from the reflector
  • FIG. 14 diagrammatically illustrates one configuration forthe discrete reflector surfaces on the reflector screen
  • FIGS. 15A, 15B and 15C diagrammatically illustrate shallow concave reflection surfaces for the plurality of discrete reflection surfaces in the reflector, a different shape for those discrete reflection surfaces (tear drop shape) and a diffraction grating used for the reflection surfaces;
  • FIGS. 16A, 16B and 16C diagrammatically illustrate contacts worn by the user to magnify the image projected by emitters and reflected from the reflector screens;
  • FIGS. 17, 18 and 19 diagrammatically illustrate the light reflection principles of an ellipse, one reflective surface configured as a semi-spherical ellipsoid, and a second reflective surface configured as ellipsoid; and,
  • FIGs. 20a, 20b and 20c shows proof of concept UDS Table C for a non-rotational symmetrical aspheric lens system with athree dimensional ellipsoidal reflector or relay and a spherical image projector.
  • the present invention relates to a viewing and display system and method using rotationally symmetric aspheric lenses permitting a projected image to be focused by a three dimensional ellipsoidal pupil relay on a user's eye (at the pupil or in the center of the eye).
  • This system permits augmented viewing of the ambient environment, or a display of a projected image, via a head mounted system.
  • the head mounted system may be configured as glasses, goggles, a head piece or helmet.
  • One embodiment places the projector and focusing lens unit outboard of the user's eye (FIGs. 1 - 5) and the other embodiment places the image projector and focusing lens unit inboard of the user's eye (FIGs. 6 - 19).
  • the present invention relates to a viewing system and a method for head mounted display worn by a user wherein the image projector and focusing lens system is mounted either on and about the bridge of a user's nose (FIG. 8) or outboard of the user's eye (FIG. 3) with a pupil relay or reflector screens for each eye mounted on the user's head via glasses or head mount helmet or cap. Similar numerals designate similar items through the drawings.
  • FIGs. 1 - 5 show a design of the viewing system wherein the image projector and focusing lens system 1 12 (projector-lens unit 1 12) is peripherally mounted on the head of a user at a position near the outboard or outside of the eye.
  • a complete viewing system would include two projector-lens units 1 12, each mounted on the glasses, goggles, helmet or head mount, at a position outside or outboard of the user's eyes. See FIG. 3, projector 140, lenses A, B and C, comprising projector-lens unit 150.
  • the viewing system shown in FIGs. 6 - 19 shows a viewing system wherein the emitter (a projector-lens unit) is inboard or on or near the bridge of the user's nose.
  • the emitter or projector-lens unit directs light to a reflector screen or a relay, which light then is directed into the eye of the user.
  • a single viewing system may be employed for one eye.
  • the reflector screen or relay is also mounted on the head mount or helmet or forms part of the user's glasses or goggles.
  • the focal point of the emitted light rays are directed at the user's eye and the precise focal point may be on the eye surface (at the user's pupil) or at the midpoint or center of the eye by the three dimensional ellipsoidal surface. This focal point distinction is discussed later with respect to FIG. 10. Similar numerals refer to similar items throughout all of the drawings. [0038]
  • the system employs three (3) optical lens elements to focus the image with rotational symmetric aspherical surfaces.
  • the outboard emitter system includes an OLED (organic light emitting diode) or a curved silicon light emitting diode (LED) image projector, which is almost flat in shape.
  • FIG. 6C shows the x - y flat and x-y curved surface combinations for the image projector of the outboard or peripheral projection system.
  • shape 1 is flat in both the x and the y direction, that is, laterally and longitudinally over the surface of the image projector.
  • the z axis is normal to the plane formed by the x - y axises.
  • shape 2 is a cylinder with an r radius in the y axis.
  • shape 3 is an ellipsoid with radii rl and r2 in the y and x axises.
  • shape 4 is Y Toroidal with a radius r in the x axis.
  • FIG. 6C, shape 5 is a biconic shape projector emitter surface and
  • shape 6 is another Y Toroidal shape. Other projectors may be used.
  • UDS Tables A and B relate to flat or almost flat projector emitter surfaces.
  • IA shows lens A, lens B and lens C which are mounted together at an outboard position on the user's head relative to the user's left eye.
  • the position of the OLED or silicon light emitting diode (LED) projector surface in the projector-lens unit is at or substantially at the first foci of the elliptical pupil relay 100.
  • the lenses are mounted atop or adjacent the image projector.
  • the image projector is not shown in FIG. 1 A but is diagrammatically shown in FIG. 3 as image projector 140.
  • Rays 121, 123 and 125 are graphic depictions of hypothetical light transmission paths but, in fact, the projector-emitter surface is mounted to or spaced from the back side 1 10 of lens A and no light transmission path exists beyond the projector-emitter surface.
  • FIGs. 5A - 5C Table A lists User Defined Surfaces ("UDS") which define the parameters of lenses A, B, and C as well as the emitter surface shape of the image projector and the shape of the elliptical pupil relay 100. Lens manufacturers and optical technicians understandthe UDS parameters listed in Table A.
  • the image or "img” UDS data in Table A relates to the surface of the image emitter (data “img”).
  • Lens A is mounted adjacent the image projector surface.
  • UDS Tables A and B list air gap or fill gap spaces between the optical elements.
  • Lens A has surfaces 1 10 and 109 defined as UDS items 10 and 9 (Table A).
  • the UDS defined surface 10 see lens surface 1 10, FIG.
  • UDS defined surface 9 (lens surface 109) is the light exit surface.
  • Intermediate lens B has an inboard surface UDS 8 (lens surface 108 adjacent lens surface 109 and generally closer to the emitter surface) and an outer lens surface 107 farther away from the emitter surface.
  • Lens surface 107 defined as UDS 7.
  • the inboard surface 106 of lens C is UDS shape 6 and the outermost lens surface 105 of the emitter-lens combination is defined at UDS 5.
  • the reflector-relay elliptical surface is defined by Table A as UDS surfaces Cl and C83, numerically identified as 3.840 and 3.59.
  • the term "surface" used herein does not refer to a structure exposed to the ambient environment but rather a material boundary. The surface may be adjacent or spaced from another surface.
  • the lenses are mounted in spaced relationship to each other as set forth in the UDS data in FIGs. 5A, B and C and 7A, B and C.
  • the illustrations herein show the lenses separated by air gaps such that the lenses are either fixed in such positions or the gap is filled by neutral optical material. Alternately, the lenses are mounted atop each other with the use of pmma or polymethyl-methacrylate as a gap filler (or other gap filler which does not effect the optical system as described).
  • PMMA Poly(methyl methacrylate)
  • an air gap exists between the projector-lens units and another air gap exists between the pupil relay and the eye.
  • Other lens combinations may be used having the same functional output, as specific lens structures and indices defined in Table A, in order to achieve the functional equivalent of the present optical processing invention.
  • the lenses A, B and C have various indices of refraction and are made of certain materials shown in Table A and as defined in the UDS parameters as the "refractive indices.”
  • FIG. 1 B shows the convergence of the light transmission paths at focal region 130.
  • the rays emitted from the lens systems described herein are collimated by the relay producing an image that appears at infinity. See collimated rays at area 130 in FIG. I B. See also, FIG. 6A and the post-relay ray pattern.
  • FIG. 2 is a side view of the system and diagrammatical Iy shows the projector-lens unit, the pupil relay 100 and the focal point 130 at the second foci of the elliptical relay.
  • FIG.3 shows that the emitter-lens unit 150 is on the left, outboard side of the user's left eye.
  • the light from the emitter-lens unit 150 is reflected off the reflector-relay screen 100 (with the UDS characteristics as listed in Table A) and into the user's left eye 10.
  • the focal point 130 is either on the pupil or in the center of the eye.
  • Another emitter-lens unit 150 is on the right projecting an optically processed image into the right eye 12 via the right-side elliptical relay 100.
  • a single view system for one eye may be used. Due to the collimation, the user sees projected images at infinity.
  • FIG.4 shows elliptical relays 100 transferring the optically processed image from projector-lens units 150 into or onto the user's eyes.
  • the relays in this embodiment are configured as glasses and the units 150 are mounted on frame arms 38.
  • Wires 34, 38, 153, 155 and 157 carry image signals to the image projectors 140 which are part of the units 150. Wires may be replaced by optic cables.
  • Coupler 36 permits the signal transmission system 34, 38, 153, 155 and 157 to be connected or disconnected from image generator 40.
  • a flat image projector surface may be used rather than the slightly curved image projector surface "img" listed in UDS Table A.
  • the flat image projector surface (the OLED projector or silicon light emitting diode (LED)) with the same three lens elements discussed above produces an image on the eye which is not as clear as the slightly curved projector emitter surface.
  • FIG. 6C shows the x - y flat and x-y curved surface combinations for shape 1 - flat; shape 2 - cylinder; shape 3 - ellipsoid; shape 4 - Y Toroidal; shape 5 - biconic; and shape 6 - Y Toroidal shape.
  • the outboard emitter-projector lens systems seem to perform better than the inboard systems.
  • FIGs. 6A. 6B and 7A. 7B and 7C illustrate and describe a different embodiment of the invention wherein the emitter-lens projectors are inboard on or near the nose bridge with non-rotational Iy symmetric aspheric lenses.
  • the emitter-lens units are mounted near or on the user's nose bridge. See FIGs. 8, 9A and 10. Further details of the inboard system are discussed later in connection with FIGs. 8 - 19.
  • the inboard systems use a non-rotational symmetric aspheric lenses.
  • FIGs. 7A - 7C defines the biconical shape of image projection surface as "img" in the UDS Table B.
  • FIG. 6C shows various shapes of the image projecting surface for the two lens system.
  • the next or adjacent lens A2, attached atop the image projector surface (not shown in FIG. 6A), has a lens surface A2-1 18 and is defined at Table B - UDS 8 surface.
  • the outboard lens surface A2 - 1 17 of the first lens A2 has UDS shape listed at UDS element 7 in Table B.
  • the outermost lens B2 has an inboard surface B2-1 16 defined as UDS element 6 shape.
  • the outermost surface B2-1 15 of the outermost lens B2 has a surface defined as UDS element 5.
  • FIGs. 6A, 6B and 7A - 7C uses an ellipsoid as a reflector-relay surface 100.
  • the focal point 130 is the foci of the ellipsoid wherein the image is focused on the top of the user's eye or in the center of the user's eye.
  • the first foci of the ellipsoidal relay 100 is substantially at the image projector surface and the second foci of the ellipsoidal relay 100 is on or in the eye.
  • the "eye" foci is shown to the right of the emitter-lens combination in FIG. 6A.
  • the other foci of the relay is a projection surface in the emitter-lens system.
  • FlG. 6B shows the biconic nature of the image projector surface 200 and the general shape of lenses A2 and B2 (which in practice would be mounted on or spaced from the image projector surface) and the short range light transmission paths.
  • This embodiment uses a curved or biconical surface for the image projector surface. See FIG. 6C.
  • the OLED or LED may be configured to match these curves.
  • a high density glass is used for more refractive power for lenses A2 and B2.
  • High density glass has a refractive index of 1.7 - 2.0.
  • the emitter surface of the OLED or silicon light emitting diode (LED) may also be configured as a monoconic surface.
  • FIG. 8 diagrammatically illustrates a user's left eye 10 and right eye
  • FIG. 8 diagrammatically illustrates the viewing system which includes a pair of emitter units which are mounted on or about the bridge of nose 14 and a pair of reflector screens, each screen corresponding to a certain emitter unit. Similar numerals designate similar items throughout the drawings. Only one emitter-reflector screen system is described in detail. Persons of ordinary skills in the art recognize that the opposite side emitter-reflector system is substantially similar.
  • a semi or hemispherical emitter unit 16 is mounted on or near the bridge of nose 14.
  • Emitter unit 16 has a plurality of emitters therein which effectively generate an optical image through center point 18. This optical image is projected substantially radially onto a specially configured reflector screen 20. Due to the reflection of the inboard side 21 of reflector screen 20, the optical image is then directed or reflected into user eye 10. In order to magnify the image, the user may employ magnifying contacts 22.
  • FIG. 9 shows spectacles (eye glasses) or goggles 30 and the back side
  • goggle or spectacle 30 includes, in the illustrated embodiment, signal line 34.
  • a removable coupling 36 permits the user to attach and detach signal line 34 to the glasses or helmet. Of course, further portions of signal line 34 extend through arm 38 (or the helmet) to both emitter units 16.
  • An image generator 40 generates an image which is applied to signal line 34. In one embodiment, an optical image is generated by image generator 40 and this optical image is carried by fiber optics in signal line 34.
  • the emitter units 16 may be electronic light generators such as LEDs or other light emitting elements and electronic signals could be carried by signal line 34. In this situation, image generator 40 generates electronic signals which correspond to the image.
  • FIG. 9B shows a head piece or helmet 42 which is mounted on the head of the user such that the optical image from emitter units 16 is projected to a depending reflector screen 20 and then redirected to the eye of the user.
  • the left and right screens drop below the front edge of the helmet and may act as eye shields.
  • the emitters also depend from the helmet and rest on or near the user's nose bridge.
  • Optical fibers in signal line 34 may reduce electrical noise and unwanted radiation which may be generated by electrical light emitters 16.
  • FIG. 10 shows that radial light rays leave light emitter unit 16 and are reflected back to the eye by the reflector screen, that is, rays a, b, and c are optically processed at the end of the emitters and are reflected back into eye 10.
  • the inboard surface 21 of reflector screen 20 includes a plurality of discrete reflection surfaces each having a discrete angle to direct the optical image from the emitter unit into the user's eye. These discrete reflection surfaces may be made by curved monolithic silicon structures described in "For a Cheaper Camera," Technology World, May, 2008, by H. Hogan. The discrete reflection surfaces are made reflective or diffractive. Therefore, in the expanded view in the upper left of FIG.
  • inboard surface 21 has a plurality of discrete reflection surfaces, one of which is surface 46, wherein optical image ray d strikes discrete reflective surface 46 and the angle of incidence and the angle of reflectance results in ray e being directed into the eye 10 of the user.
  • FIG. 10 shows that the pair of emitter units 16 are placed a predetermined distance from the user's eye (distance from the centerline of the nose) when taking into account the distance between radial centerpoint 18 of emitter 16 and the reflection of the light towards eye 10.
  • eye 10 has an optical center point 50 that falls on line 51 defined by the forward edge of semi or hemispherical emitter unit 16. Calculations indicate that there is a reasonable common interpupillary distance or IP for most users.
  • emitter 16 has light transmitters of the same size. In another embodiment, the size of the emitter surfaces varies.
  • FIG. 1 1 diagrammatically shows thatcollimated light, when reflected from reflective surface 21 , can be directed to a singular point. That singular point is preferably at or immediately below the cornea of the user's eye.
  • the semi or hemispherical emitter 16 must have a plurality of emitter units having different sizes.
  • the emitters have the same size or radii generating the optical image. For improved fill factor circle pack individual emitter surfaces using an interstice (3) pattern.
  • FIG. 1 1 also shows that a spherical emitter-projector, with an associated lens system (a non-rotational symmetrical aspheric lens system established by the proof of concept Table C) develops collimated image rays to the eye.
  • the lens system as noted in the proof of concept UDS Table C, FIGs. 20a, 20b and 20c, is a non-rotational symmetrical aspheric lens system with a three dimensional ellipsoidal reflector or relay which uses pmma(see pmmao in Table C nearthe refractive indices chart).
  • FIG. 12 shows emitter 16 having a plurality of discrete emitters 52
  • the semi or hemispherical emitter unit 16 itself forms a concave projector wherein the emitter surface or light projection emitting pixels (surface 52a) are smaller on outboard side 62 as compared with inboard side 64. Inboard or proximal side 64 is nearer to the eye as shown by side 64 in FIG. 10. Side 62 is outboard or distal with respect to eye 10.
  • the different sizes of the emitters compensate for the longer distances traveled by rays c (FIG. 10) as compared to short distance rays a.
  • FIG. 13A shows a portion of emitter unit 16 and particularly emitters
  • emitters 52, 54 and 56 These emitters may have emitting surfaces tightly packed on the concave unit 16.
  • Each emitter may have, mounted thereon, an optical lens, one of which is lens 66 on emitter 52.
  • Faceplates may be used also (see faceplates manufactured by Schott of Germany).
  • faceplates manufactured by Schott of Germany.
  • lenses 66, 67, 68 it may be possible to have a uniform set of emitters (same radii) on emitter unit 16 and vary the type or degree of image magnification or diffusion via lenses 66, 67, 68.
  • lenses 66, 67, 68 may be cylinders which further collimate the light directed to reflector screen 21. It's beneficial that the light be collimated as much as possible in order to correctly optically transmit the image into eye 10.
  • a single lens for groups of emitter surfaces or a single lens for all emitter surfaces may be used.
  • FIGS. 14 and 15 A- 15C diagrammatically show different shapes of the reflective surfaces 46 on the reflector screen.
  • Reflective surface or facet 46 is at an appropriate or predetermined angle such that reflective surface edge face 70 is aligned or in line with imaginary line 72 which is parallel to incoming optical rays b (FIG. 10) from emitter 16 and the reflective surface transmits the light into the eye. In this manner, most of the optical image ray b is reflected from reflection surface 46 and only a small amount of stray light is reflected or deflected due to the edge face 70.
  • FIG. 15A shows that reflection surface 46 may be generally circular
  • the reflective surface may be planar or may have a slightly concave shape which shape redirects and focuses light back into eye 10.
  • FIG. 15B shows that reflective surface 46 in the reflector plate plane may be tear drop shaped.
  • the reflective surface 46 may be concave, convex or other curved surface.
  • the packing ratio of the reflective surfaces can be designed by a computer.
  • FIG. 15C shows that reflective surface 46 may include a diffraction grating.
  • each of the user's eyes may wear a contact 22.
  • the user may or may not wear contact lenses to magnify the optical image.
  • the use of an ellipsoid relay avoids the need of a contact lens in most situations.
  • the contacts may be full field of view magnifiers or partial view magnification.
  • One partial view contact with a central region 76 magnification and a clear or zero magnification in peripheral region 78 (see FIG. 16A).
  • Another partial view magnification is lenses 80, 81 have outboard peripheral regions g, h in FIG. 16B which have a magnification plus value.
  • the inboard regions are zero diopters.
  • FIGS. 17, 18 and 19 diagrammatically show the optical performance of a semi or spherical ellipsoid as a reflective screen.
  • FIG. 17 diagrammatically shows an ellipsoid with focii at points m and n. The distance of line nq plus qm is the same as the distance of combined line np plus pm. Therefore, in FIG.
  • Reflective screen 86 has an ellipsoid surface which is semi-spherical 88.
  • FIG. 19 shows the semi-spherical ellipsoid surface 88 where the distance traveled by w optic ray or u optic ray is focused to eye center point 50.
  • Eye centerpoint 50 is one of the focii of the ellipsoid. In this manner, when eye 10 rotates as shown by the dashed line v, the optical image is directed into the interior of the eye.
  • the reflective screens do not block inboard directed or ambient light.
  • the reflector may be characterized as a thin screen such that non-reflected emitter rays traversing the reflector plate are minimal.

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Abstract

L'invention concerne un procédé et un système qui focalisent une image projetée avec de multiples surfaces asphériques à symétrie de rotation et un relais réflecteur ellipsoïdal sur ou dans l'œil d'un utilisateur. L'image est projetée à partir des premiers foyers elliptiques et est focalisée sur l'œil au niveau des seconds foyers. Une unité de projecteur externe montée en périphérie utilise trois lentilles et une surface de projecteur sensiblement plate. Selon une autre possibilité, une unité de projecteur montée embarquée utilise deux lentilles avec des surfaces asphériques sans symétrie de rotation et une surface de projecteur biconique (diode électroluminescente organique (OLED) ou silicium courbé). Il est possible d'utiliser une seule lentille avec un projecteur d'image sphérique. Le système projecteur d'image-lentille et le relais pupille ellipsoïdal sont correctement positionnés sur la tête de l'utilisateur par un système de montage sur la tête qui peut être un masque, des lunettes portées par l'utilisateur, ou des écrans dépendant d'une coiffe ou d'un casque porté(e) par l'utilisateur.
PCT/US2008/007409 2007-06-13 2008-06-13 Système de visualisation pour visiocasque à réalité accrue WO2008156675A1 (fr)

Applications Claiming Priority (6)

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US94363807P 2007-06-13 2007-06-13
US11/762,171 2007-06-13
US60/943,638 2007-06-13
US11/762,171 US20080309586A1 (en) 2007-06-13 2007-06-13 Viewing System for Augmented Reality Head Mounted Display
US2366408P 2008-01-25 2008-01-25
US61/023,664 2008-01-25

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EP2947500A1 (fr) * 2014-05-21 2015-11-25 Kabushiki Kaisha Toshiba Dispositif d'affichage
EP2951634A4 (fr) * 2013-01-31 2016-10-26 Google Inc Affichage transparent proche de l'oeil avec prescription ophtalmique
EP3730993A4 (fr) * 2017-12-22 2021-02-24 Sony Corporation Dispositif d'affichage d'image et dispositif d'affichage
CN112558390A (zh) * 2020-11-09 2021-03-26 深圳市菲森科技有限公司 一种基于oled的变焦投影系统

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EP2951634A4 (fr) * 2013-01-31 2016-10-26 Google Inc Affichage transparent proche de l'oeil avec prescription ophtalmique
EP2947500A1 (fr) * 2014-05-21 2015-11-25 Kabushiki Kaisha Toshiba Dispositif d'affichage
EP3730993A4 (fr) * 2017-12-22 2021-02-24 Sony Corporation Dispositif d'affichage d'image et dispositif d'affichage
CN112558390A (zh) * 2020-11-09 2021-03-26 深圳市菲森科技有限公司 一种基于oled的变焦投影系统

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