WO2018139141A1 - Élément optique et dispositif d'affichage d'image l'utilisant - Google Patents

Élément optique et dispositif d'affichage d'image l'utilisant Download PDF

Info

Publication number
WO2018139141A1
WO2018139141A1 PCT/JP2017/046392 JP2017046392W WO2018139141A1 WO 2018139141 A1 WO2018139141 A1 WO 2018139141A1 JP 2017046392 W JP2017046392 W JP 2017046392W WO 2018139141 A1 WO2018139141 A1 WO 2018139141A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical element
refractive index
light
base
light absorbing
Prior art date
Application number
PCT/JP2017/046392
Other languages
English (en)
Japanese (ja)
Inventor
有希 前田
前川　聡
Original Assignee
株式会社パリティ・イノベーションズ
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
Application filed by 株式会社パリティ・イノベーションズ filed Critical 株式会社パリティ・イノベーションズ
Priority to JP2018564175A priority Critical patent/JP7152019B2/ja
Publication of WO2018139141A1 publication Critical patent/WO2018139141A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors

Definitions

  • the present invention relates to an optical element that forms a real image of an observation object on one surface side in a space on the other surface side, and an image display device using the optical element.
  • An optical element has been devised in which a projection object is arranged on one surface side of a plane body that partitions a certain space, and a mirror image of the projection object is formed at a position that is plane-symmetric in the space on the other surface side.
  • this type of optical element there is known an optical element having a structure in which a plurality of two-surface corner reflectors each composed of two minute mirror surfaces (reflection surfaces) perpendicular to each other are assembled in a plane (for example, Patent Documents). 1).
  • Patent Document 1 discloses an optical element having a two-sided corner reflector array in which a plurality of two-sided corner reflectors are arranged in a grid on a single plane.
  • each mirror surface forming a dihedral corner reflector is arranged perpendicular to the element surface of the optical element. Therefore, the light emitted from the observation object arranged on one surface side of the element surface is reflected and bent twice by the two-surface corner reflector when passing through the optical element, and the other surface without the observation object.
  • a real image is formed in the side space. Thereby, the real image is formed so that the object to be observed exists at a symmetrical position with respect to the element surface of the optical element.
  • the optical element described in Patent Document 1 a plurality of cube-shaped projecting portions protruding from the surface of the base are arranged, and the inner wall of the projecting portion is used as a mirror surface, and the total reflection of light on the inner wall is used. Then, a real mirror image is formed.
  • the projecting portion is formed by providing a lattice-like groove between adjacent projecting portions (two-surface corner reflectors). In such a configuration, a part of the light incident on the substrate is guided to the groove side without entering the projecting portion. Of the light emitted from the object to be observed, the light incident on the mirror surface at an angle smaller than the critical angle is guided to the groove side without being reflected by the mirror surface.
  • the light guided to the groove side becomes stray light that does not contribute to the image formation of the real mirror image and reduces the contrast of the stereoscopic image. Further, since the groove between the two-surface corner reflectors is as fine as ⁇ m, when ambient light such as external illumination light enters the groove, the light is irregularly reflected by the groove, causing white blurring.
  • the present invention solves the above-described problem, suppresses stray light that does not contribute to the image formation of a real mirror image, improves the contrast of a stereoscopic image, and suppresses irregular reflection of light between a plurality of two-surface corner reflectors.
  • An object of the present invention is to provide an optical element capable of reducing white blur and an image display apparatus using the optical element.
  • the present invention provides an optical element that forms a real image of an object to be observed on one surface side in a space on the other surface side and is formed of a transparent material and forms a single plane. And a plurality of protrusions formed integrally with the base so as to protrude from the base, the protrusion having three or more side surfaces having an angle with respect to the base. Two adjacent surfaces of the side surfaces are perpendicular to the base and are substantially orthogonal to each other, forming a two-surface corner reflector that reflects light emitted from the object to be observed, and a plurality of the protrusions.
  • a low refractive index portion made of a medium having a refractive index lower than the refractive index of the transparent material forming the projecting portions, and a light absorbing portion that absorbs light guided between the plurality of projecting portions. And the low refractive index portion is in contact with the two-surface corner reflector And wherein the door.
  • the low refractive index portion has a thickness of 1 ⁇ m or more from the surface of the dihedral corner reflector.
  • the light absorbing portion is in contact with a side surface of the protruding portion that does not form the two-surface corner reflector.
  • the light absorbing portion is composed of particles having a diameter of 1 ⁇ m or more.
  • the optical element further includes a transparent panel that collectively covers the plurality of protruding portions, and the light absorbing portion is formed in a region of the transparent panel that faces the plurality of protruding portions. Preferably it is.
  • the optical element is preferably used in a video notation device.
  • the optical element since the low refractive index portion is in contact with the side surface forming the dihedral corner reflector, the optical element has a large refractive index difference from the medium constituting the optical element, and the total reflection efficiency is improved.
  • Real mirror image can be brightened.
  • a light absorbing portion is provided between the projecting portions, the light guided between the projecting portions is cut, and the occurrence of stray light that does not contribute to the image formation of the real mirror image is suppressed.
  • the contrast of the real mirror image can be improved.
  • the light absorbing section cuts off ambient light such as external illumination light, the light is not irregularly reflected between the fine protrusions, and the occurrence of white blur can be suppressed.
  • FIG. 1 is a schematic perspective view conceptually showing a configuration example of an optical element according to a first embodiment of the present invention.
  • (A) (b) is a figure which shows typically the image formation mode by the said optical element. The perspective view which expanded a part of said optical element.
  • (A) is a side view of the optical element, and (b) is a top view. The side view for demonstrating the effect
  • (A) and (b) are the side views for demonstrating the structure which concerns on the 1st modification of the said optical element, and its formation method.
  • (A) is a side view for demonstrating the structure and its formation method which concern on the 2nd modification of the said optical element,
  • (b) is an enlarged view of the dashed-dotted line area
  • the side view for demonstrating the structure and its formation method which concern on the 3rd modification of the said optical element The side view for demonstrating the structure and its formation method which concern on the 4th modification of the said optical element.
  • the optical element 1 of the present embodiment includes a two-surface corner reflector 30 composed of mirror surfaces (vertical surfaces 31 and 32) that are perpendicular to the substrate 2 and substantially orthogonal to each other.
  • the plurality of two-surface corner reflectors 30 are arranged in a grid on one plane of the base 2 to form a two-surface corner reflector array 30S.
  • the real image (real mirror image P) of the object to be observed O is connected to the space on the other surface side of the element surface 1S of the optical element 1.
  • the optical element 1 forms an image of the real mirror image P of the observation object O at a plane-symmetrical position with the element surface 1S as a symmetry plane.
  • the element surface 1 ⁇ / b> S refers to a virtual plane orthogonal to the two vertical surfaces 31 and 32 constituting the two-surface corner reflector 30.
  • the dihedral corner reflector 30 is as fine as ⁇ m in comparison with the total size of the optical element 1 being in the order of cm or m, and in FIG. It is shown conceptually in a letter shape.
  • FIG. 2A The imaging mode by the two-surface corner reflector array 30S will be described with reference to FIGS.
  • FIG. 2A light emitted from a point light source o as a projection object is assumed to travel three-dimensionally from the back side to the front side of the page.
  • Light (solid arrow) emitted from the point light source o is reflected by one mirror surface (vertical surface 31) constituting the two-surface corner reflector 30 when passing through the optical element 1 (not shown in FIG. 2A). Then, after being reflected by the other mirror surface (vertical surface 32), it passes through the element surface 1S (see FIG. 2B).
  • the light emitted from the optical element 1 passes through the element surface 1S while spreading in a plane symmetrical position p of the point light source o. That is, the transmitted light of the optical element 1 is focused at a plane symmetry position p with respect to the element surface 1S of the point light source o, and forms an image as a real mirror image P (see FIG. 1).
  • the base 2 is formed of a transparent material and forms a plane.
  • the optical element 1 has a plurality of protruding portions 3 formed so as to protrude from the base 2.
  • the plurality of protrusions 3 are integrally formed with the base 2 by the same transparent material as the base 2.
  • the protruding portion 3 has three or more side surfaces having an angle with respect to the base 2.
  • the protruding portion 3 of the present embodiment has a truncated pyramid shape, and includes two surfaces perpendicular to the base 2 (vertical surfaces 31 and 32) and two surfaces inclined with respect to the base 2 (inclined surfaces 33 and 34). 4 side surfaces and an upper surface 35 forming a surface parallel to the base 2. Of the side surfaces, two surfaces, the vertical surfaces 31, 32, are adjacent to each other, and two surfaces, the inclined surfaces 33, 34, are adjacent to each other. The vertical surfaces 31 and 32 are disposed so as to be substantially orthogonal to each other.
  • the light (solid line arrow in FIG. 4A) incident on the protruding portion 3 from the base 2 is totally reflected twice by the inner wall surfaces of the vertical surfaces 31 and 32 and is emitted from the upper surface 35 of the protruding portion 3.
  • the upper surface 35 is defined by ridge lines with the vertical surfaces 31 and 32 and the inclined surfaces 33 and 34, and the lengths thereof are substantially equal, and are substantially square in a top view (see FIG. 4B).
  • the vertical surface 31 (32) is an inclined surface in a side view (see FIG. 4B), where the boundary line with the base 2 (dotted line in FIG. 4A) is the lower base, the ridge line with the upper surface 35 is the upper base, This is a trapezoid having the ridge line with 33 and 34 as a hypotenuse and the ridge line with adjacent vertical surfaces 32 and 31 as a vertical side.
  • a plurality of protrusions 3 having the above-mentioned shape are arranged in a grid.
  • one vertical surface 31 and the other inclined surface 34 face each other, and one vertical surface 32 and the other inclined surface 33 face each other.
  • the plurality of protrusions 3 are formed with lattice-like grooves 21 between the vertical surfaces 31 and 32 and the inclined surfaces 34 and 33 facing each other.
  • a plane parallel to the base 2 is formed between the side of the vertical surface 32 (31) facing the base 2 and the side of the inclined surface 33 (34) on the base 2 side, and the bottom of the groove 21 is formed.
  • a bottom surface 22 is formed.
  • the optical element 1 is guided to the groove 21 between the plurality of protrusions 3, the low refractive index part 4 made of a medium having a refractive index lower than the refractive index of the transparent material forming the protrusions 3, and the groove 21.
  • a light absorbing portion 5 that absorbs the waved light is disposed.
  • the low refractive index portion 4 is in contact with the vertical surfaces 31 and 32 forming at least a two-surface corner reflector.
  • a transparent material that has a light transmittance of 80% or more and a refractive index of 1.3 or more and hardly deteriorated due to heat or humidity is used for the medium of the base 2 and the protruding portion 3 constituting the optical element 1.
  • a transparent material include acrylic resin and glass.
  • the cycloolefin polymer include trade name: ZEONOR (registered trademark) (grade: 1020R, light transmittance: 92%, refractive index: 1.53) manufactured by ZEON Corporation.
  • the low refractive index portion 4 desirably has a refractive index of 1.4 or less in order to reduce the critical angle on the vertical surfaces 31 and 32 and easily cause total reflection.
  • the medium of the low refractive index portion 4 is air.
  • a portion excluding the low refractive index portion 4 and the light absorbing portion 5, that is, a dihedral corner reflector array 30S composed of the base 2 and the plurality of protruding portions 3 is produced.
  • the as a method for producing the two-sided corner reflector array 30S for example, a method of injection-molding a translucent resin or a hot press molding method using a mold such as a stamper can be cited.
  • the mold is manufactured by, for example, a method in which a shape corresponding to the shape of the protrusion 3 and the groove 21 (see FIG. 3) described above is formed on a metal master plate by nano-processing, and then reversal is performed. Further, for example, by using an X-ray lithography method, it is possible to produce the protruding portion 3 and the groove 21 having four side surfaces directly on the base 2 made of a transparent material.
  • two of the four surfaces forming the protruding portion 3 are the inclined surfaces 33 and 34. That is, the protruding portion 3 has a truncated pyramid shape.
  • a bottom surface 22 is provided in the groove 21 between the plurality of adjacent protruding portions 3. According to such a shape, it is possible to attach a so-called “drawer taper” to the protruding portion 3 which is a fine structure on the order of ⁇ m, and when the two-sided corner reflector array 30S is formed by molding, The two-sided corner reflector array 30S can be easily removed from a mold such as a stamper.
  • the width W of one side in the top view of the pitch 3 of the protruding portion 3 including the groove 21 is, for example, 100 to 700 ⁇ m (see FIG. 4B).
  • the pitch width W is set according to the pop-out distance of the real mirror image P (see FIG. 1). For example, when the pop-out distance is 10 cm, the pitch width W is about 280 ⁇ m.
  • the plate thickness of the optical element 1 including the base 2 and the protrusions 3 is generally 1 to 3 mm.
  • the height H (depth of the groove 21) of the protrusion 3 from the base 2 (the bottom surface 22 of the groove 21) is set to be equal to or larger than the pitch width W.
  • the inclination angle ⁇ of the inclined surfaces 33 and 34 with respect to the normal of the base 2 is preferably 5 to 25 ° (see FIG. 4A).
  • the inclination angle ⁇ is preferably 5 to 25 ° (see FIG. 4A).
  • the size (width L) of the upper surface 35 serving as an emission surface of the light reflected by the two-surface corner reflector 30 depends on the height H of the protrusion 3. And the darkness of the real mirror image P can be suppressed.
  • the height H of the protruding portion 3 is 300 ⁇ m
  • the width W of one side in the top view of the pitch 3 of the protruding portion 3 is 300 ⁇ m
  • the width L of one side of the upper surface 35 is 200 ⁇ m
  • the inclination angle ⁇ is 18 °.
  • the width D of the bottom surface 22 of the groove 21 is about 2.5 ⁇ m.
  • the numerical value shown here is a representative value shown as an example of this embodiment, and this invention is not limited to these numerical values.
  • the optical element 1 of the present embodiment is obtained by further forming the low refractive index portion 4 and the light absorbing portion 5 on the two-surface corner reflector 30 manufactured as described above.
  • the light absorbing portion 5 for example, black ink or particulate pigment is used.
  • the low refractive index portion 4 has a thickness of 1 ⁇ m or more from the surfaces of the vertical surfaces 31 and 32 forming the dihedral corner reflector 30.
  • the low refractive index portion 4 is formed so that the portion having a thickness of 1 ⁇ m or more from the surfaces of the vertical surfaces 31 and 32 forming the dihedral corner reflector 30 is 50% or more of the total area of the vertical surfaces 31 and 32. It only has to be done.
  • the low refractive index portion 4 having a thickness of 1 ⁇ m or more is disposed on at least 50% of the total area of the vertical surfaces 31 and 32 at least outside the vertical surfaces 31 and 32 in a region where evanescent waves can ooze out.
  • the low refractive index portion 4 and the light absorbing portion 5 for example, a method of applying an ink containing a light absorbing material toward the inclined surface 33 (34) and the bottom surface 22 of the groove 21 by micro ink jet printing. Is mentioned. In this way, the ink applied to the inclined surface 34 (33) and the bottom surface 22 of the groove 21 becomes the light absorbing portion 5, and air exists on the vertical surface 31 (32) side where the ink is not applied. The space in which this air exists becomes the low refractive index portion 4. As long as there is no problem in practical use, there may be uneven coating on the inclined surface 34 (33) or the groove 21, and some ink may adhere to the vertical surface 31 (32).
  • the low refractive index portion 4 is in contact with the vertical surface 32 (the same applies to the vertical surface 31) forming the dihedral corner reflector 30.
  • the refractive index difference from the medium constituting 1 is increased.
  • the critical angle at the vertical surface 32 is reduced, and light having a small incident angle ⁇ (solid arrow in the figure) that is not totally reflected in the absence of the low refractive index portion 4 can be totally reflected.
  • Efficiency is improved.
  • the real mirror image P can be brightened.
  • the light absorbing portion 5 is provided between the projecting portions 3, the light incident on the substrate 2 is not incident on the projecting portion 3, but is guided from the bottom surface 22 to the groove 21 side.
  • Light (broken arrow in the figure) is cut by the light absorbing portion 5.
  • light that is incident on the vertical surface 32 at an angle of incidence smaller than the critical angle and transmitted to the groove 21 side (dotted line arrow in the figure) is also cut.
  • the light guided to the groove 21 side is cut by the light absorption unit 5, so that stray light that does not contribute to the image formation of the real mirror image P can be suppressed, and the contrast of the real mirror image P can be suppressed. Can be improved.
  • the groove 21 between the two-surface corner reflectors 30 is as fine as ⁇ m, but even if ambient light such as external illumination light (two-dot chain line arrow in the figure) is incident on the groove 21, no light is emitted. Since the absorption part 5 cuts it, light is not diffusely reflected by the fine groove
  • the light absorbing portion 5 is preferably in contact with the side surface of the protruding portion 3 that does not form the two-surface corner reflector 30, that is, in the present embodiment, the inclined surfaces 33 and 34. It is possible that a part of the light incident on the projecting portion 3 from the base 2 enters the inclined surfaces 33 and 34 instead of the vertical surfaces 31 and 32. This light also does not contribute to the image formation of the real mirror image P, and when guided to the groove 21 side, it becomes stray light that lowers the contrast of the real mirror image P. Therefore, the light guided to the groove 21 side can be cut by arranging the light absorbing portion 5 in contact with the inclined surfaces 33 and 34.
  • the configuration of the low refractive index portion 4 and the light absorbing portion 5 and the formation method thereof are not limited to those described above.
  • a modified example related to the configuration of the low refractive index portion 4 and the light absorbing portion 5 and a method for forming the modified example will be described.
  • a removable sealing material Rm is formed in a thickness of 1 ⁇ m in advance on the vertical surface 32 (31), and the groove 21 is made of a light absorbing material Am.
  • the forming method include filling, curing the filled light absorbing material Am, and then removing the sealing material Rm.
  • a space having a thickness of about 1 ⁇ m is provided from the vertical surface 32 (31) in the space where the sealing material Rm is formed, and this gap is low.
  • the light absorbing material Am that becomes the refractive index portion 4 and is filled excluding the gap becomes the light absorbing portion 5.
  • this forming method include a method in which only the sealing material Rm is removed by immersing them in a predetermined solvent in which the light absorbing material Am is not dissolved but the sealing material Rm is dissolved.
  • the low refractive index portion 4 is in contact with the vertical surface 32 (31) forming the dihedral corner reflector 30, the total reflection efficiency is improved and the real mirror image P can be brightened. it can.
  • the light absorption part 5 is provided between the protruding parts 3, a stray light can be suppressed and the contrast of the real mirror image P can be improved.
  • the light absorbing portion 5 occupies a larger proportion in the groove 21 than in the configuration example shown in FIG. 5, so that ambient light such as illumination light itself is prevented from entering the groove 21. The occurrence of white blur can be effectively suppressed.
  • the grooves 21 between the plurality of protruding portions 3 there is a method of filling the grooves 21 between the plurality of protruding portions 3 with substantially spherical light absorbing particles 5s.
  • the light absorbing particles 5s for example, resin, carbon or the like is used, and particles in which carbon black is included in crosslinked polymer fine particles are particularly preferable.
  • the lower limit of the particle diameter of the light absorbing particles 5s is 1 ⁇ m or more, preferably 2 ⁇ m or more.
  • the upper limit of the particle diameter of the light-absorbing particles 5 s should be at least smaller than the maximum width of the groove 21, and is preferably 10 ⁇ m or less in consideration of the filling property into the groove 21.
  • the portion having a thickness of 1 ⁇ m or more from the surfaces of the vertical surfaces 31 and 32 forming the dihedral corner reflector 30 is 50% or more of the total area of the vertical surfaces 31 and 32.
  • the thickness of the low refractive index portion 4 may be partially 1 ⁇ m or less.
  • the low refractive index portion 4 and the light absorbing portion 5 are formed by a simple method of filling the grooves 21 between the plurality of protruding portions 3 with the substantially spherical light absorbing particles 5s. can do.
  • the stray light that does not contribute to the image formation of the real mirror image P is suppressed to improve the contrast of the stereoscopic image, and the irregular reflection of light between the plurality of two-surface corner reflectors 30 is suppressed, White blur can be reduced.
  • FIG. 8 it further includes a transparent panel 6 that collectively covers the plurality of protruding portions 3, and the light absorbing portion 5 is a plurality of protruding portions of the transparent panel 6.
  • channel 21 between 3 is mentioned.
  • glass, acrylic resin, glass and transparent material are used.
  • a pattern of the groove 21 between the plurality of protrusions 3 is scanned, and the same pattern printed on the transparent panel 6 with a light absorbing material (ink) is used as the plurality of protrusions 3.
  • the printed pattern may be slightly different from the actual groove pattern, and there may be a slight misalignment in bonding.
  • the width of the printed groove pattern may have an error of about ⁇ 20 ⁇ m compared to the actual width of the groove 21, and the positional deviation at the time of bonding may be about ⁇ 20 ⁇ m.
  • a space surrounded by the grooves 21 between the plurality of protruding portions 3 and the light absorbing portion 5 formed in the transparent panel 6 is the low refractive index portion 4. Also in the third modification example, as in the above configuration example, and in the above configuration example, stray light that does not contribute to the image formation of the real mirror image P is suppressed to improve the contrast of the stereoscopic image, and a plurality of White blurring can be reduced by suppressing irregular reflection of light between the two-surface corner reflectors 30.
  • the light absorbing portion 5 is flat. Since it prints on the transparent panel 6 of a shape, the light absorption part 5 can be formed substantially two-dimensionally, and the low refractive index part 4 and the light absorption part 5 can be formed easily.
  • the fourth modified example is one in which the protruding portion 3 is a cube, and the inclined surfaces 33 and 34 in the above configuration example do not exist, and the side surface of the protruding portion 3 is configured 4.
  • Each of the surfaces is a vertical surface (vertical surface 36 in the illustrated example).
  • the low refractive index portion 4 is also provided on the vertical surface 36 side.
  • the video display device 10 is a specific application of the optical element 1 described above, and includes a box 12 having an opening 11 on an upper surface, and a video display unit 13 provided on an inner surface of the box 12. Prepare.
  • the optical element 1 is attached to the opening 11 of the box 12.
  • the video display unit 13 uses, for example, a liquid crystal display device, and in the illustrated example, the image “A” is displayed in an inverted posture in which the character “A” is inverted upside down.
  • the light emitted from the image display unit 13 is bent and reflected by the optical element 1 to form a real mirror image of the letter “A”.
  • the observer can view the real mirror image of the letter “A” as an aerial image when looking into the optical element 1 with the viewpoint Ep placed obliquely above the image display device 10.
  • the protruding portion 3 has a truncated pyramid shape or a cubic shape having four side surfaces, but has two vertical surfaces and an upper surface that emits light.
  • a triangular frustum shape or a pyramid shape having five or more corners may be used.
  • the light absorbing portion 5 is not necessarily limited to the configuration example described above as long as it exists between the plurality of protruding portions 3 so that the low refractive index portion 4 is formed between the vertical surfaces 31 and 32. I can't.
  • the low refractive index portion 4 is most preferably mainly composed of air having a low refractive index.
  • the low refractive index portion 4 is a translucent resin, hollow silica particle, or mesoporous material having a refractive index lower than that of the protrusion 3 itself. Silica particles and the like may be applied as appropriate.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

L'invention concerne un élément optique qui améliore le contraste d'une image en supprimant la lumière parasite ne contribuant pas à la formation d'une image en miroir réelle et qui réduit le flou blanc en supprimant la diffusion de la lumière entre des réflecteurs dièdres à deux surfaces. Un élément optique (1) comprend une base (2) qui est constituée d'un matériau transparent et forme une surface plate, et une pluralité de parties saillantes (3) qui sont formées d'un seul tenant de façon à faire saillie de la base (2). Des surfaces verticales adjacentes (31, 32) parmi des surfaces latérales constituant chaque partie saillante (3) forment un réflecteur dièdre à deux surfaces (30) présentant deux surfaces sensiblement perpendiculaires. Entre la pluralité de parties saillantes (3) sont disposées : des parties à faible indice de réfraction (4) composées d'un milieu ayant un indice de réfraction qui est inférieur à celui du matériau transparent constituant les parties saillantes (3); et des parties d'absorption de lumière (5) qui absorbent la lumière guidée entre la pluralité de parties saillantes (3). De plus, les parties à faible indice de réfraction (4) viennent en contact avec les réflecteurs dièdres à deux surfaces (30).
PCT/JP2017/046392 2017-01-30 2017-12-25 Élément optique et dispositif d'affichage d'image l'utilisant WO2018139141A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018564175A JP7152019B2 (ja) 2017-01-30 2017-12-25 光学素子及びそれを用いた映像表示装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-014733 2017-01-30
JP2017014733 2017-01-30

Publications (1)

Publication Number Publication Date
WO2018139141A1 true WO2018139141A1 (fr) 2018-08-02

Family

ID=62978508

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/046392 WO2018139141A1 (fr) 2017-01-30 2017-12-25 Élément optique et dispositif d'affichage d'image l'utilisant

Country Status (2)

Country Link
JP (1) JP7152019B2 (fr)
WO (1) WO2018139141A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023162378A1 (fr) * 2022-02-24 2023-08-31 株式会社パリティ・イノベーションズ Élément optique et dispositif d'affichage d'image l'utilisant
JP7498637B2 (ja) 2020-08-07 2024-06-12 株式会社日本触媒 空中ディスプレイ
JP7498636B2 (ja) 2020-06-29 2024-06-12 株式会社日本触媒 空中ディスプレイのパッシブ光学素子及びそれを備える空中ディスプレイ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003066206A (ja) * 2001-08-27 2003-03-05 Dainippon Printing Co Ltd 二次元視野角拡大部材および表示装置
US20070252954A1 (en) * 2003-05-22 2007-11-01 Mcguire James P Jr Beamsplitting structures and methods in optical systems
WO2009131128A1 (fr) * 2008-04-22 2009-10-29 Fujishima Tomohiko Dispositif d’imagerie optique et procede d’imagerie optique mettant en œuvre ce dispositif
WO2011108469A1 (fr) * 2010-03-01 2011-09-09 シャープ株式会社 Elément de formation d'image réfléchissant et système optique
JP2011191404A (ja) * 2010-03-12 2011-09-29 Stanley Electric Co Ltd ２面コーナーリフレクタアレイ光学素子およびそれを用いた表示装置
JP2012247459A (ja) * 2011-05-25 2012-12-13 National Institute Of Information & Communication Technology リフレクタアレイ光学装置およびそれを用いた表示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6742903B2 (en) * 2001-07-25 2004-06-01 Francis X. Canning Arrangement of corner reflectors for a nearly omnidirectional return
US7926961B2 (en) * 2008-11-20 2011-04-19 Bae Systems Information And Electronic Systems Integration Inc. Low background flux telescope with integrated baffle
US9097849B2 (en) * 2013-03-07 2015-08-04 Seiko Epson Corporation Display device
CN107167918B (zh) * 2017-07-12 2023-12-19 陈科枫 平面对称成像光学板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003066206A (ja) * 2001-08-27 2003-03-05 Dainippon Printing Co Ltd 二次元視野角拡大部材および表示装置
US20070252954A1 (en) * 2003-05-22 2007-11-01 Mcguire James P Jr Beamsplitting structures and methods in optical systems
WO2009131128A1 (fr) * 2008-04-22 2009-10-29 Fujishima Tomohiko Dispositif d’imagerie optique et procede d’imagerie optique mettant en œuvre ce dispositif
WO2011108469A1 (fr) * 2010-03-01 2011-09-09 シャープ株式会社 Elément de formation d'image réfléchissant et système optique
JP2011191404A (ja) * 2010-03-12 2011-09-29 Stanley Electric Co Ltd ２面コーナーリフレクタアレイ光学素子およびそれを用いた表示装置
JP2012247459A (ja) * 2011-05-25 2012-12-13 National Institute Of Information & Communication Technology リフレクタアレイ光学装置およびそれを用いた表示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7498636B2 (ja) 2020-06-29 2024-06-12 株式会社日本触媒 空中ディスプレイのパッシブ光学素子及びそれを備える空中ディスプレイ
JP7498637B2 (ja) 2020-08-07 2024-06-12 株式会社日本触媒 空中ディスプレイ
WO2023162378A1 (fr) * 2022-02-24 2023-08-31 株式会社パリティ・イノベーションズ Élément optique et dispositif d'affichage d'image l'utilisant

Also Published As

Publication number Publication date
JP7152019B2 (ja) 2022-10-12
JPWO2018139141A1 (ja) 2020-02-06

Similar Documents

Publication Publication Date Title
CN113866998B (zh) 用于在空中成像的系统
JP6598297B2 (ja) ２面コーナーリフレクタアレイ
JP5437436B2 (ja) 光学結像装置
WO2018139141A1 (fr) Élément optique et dispositif d'affichage d'image l'utilisant
WO2016136827A1 (fr) Écran à transmission et dispositif d'affichage tête haute l'utilisant
JP6601742B2 (ja) 透過型スクリーン及びそれを用いたヘッドアップディスプレイ装置
JP5614745B2 (ja) ２面コーナーリフレクタアレイ光学素子を用いた表示装置
JP2005063926A (ja) 発光デバイス
JP2004151592A (ja) コントラスト向上シートおよび背面投射型スクリーン
JP2006337944A (ja) 半透過型反射スクリーン
KR20070001053A (ko) 프레넬 렌즈 시트, 투과형 스크린 및 배면 투사형 표시장치
JP2855510B2 (ja) レンズシート、エッジライト型面光源及び透過型表示体
WO2011068168A1 (fr) Feuille de diffusion de lumière, procédé de fabrication associé et dispositif d'affichage transmissif pourvu de la feuille de diffusion de lumière
JP2000056105A (ja) 指向性光拡散フィルム、その製造方法、及び、表示装置
JP6837668B2 (ja) 光学素子及びそれを用いた映像表示装置
JP4737226B2 (ja) 光拡散シート、及びプロジェクションスクリーン
WO2012005135A1 (fr) Feuille de diffusion de lumière et dispositif d'affichage comprenant cette feuille de diffusion de lumière
WO2019159758A1 (fr) Dispositif de formation d'image optique
JP2014142429A (ja) 反射型スクリーン、前面投射型表示装置、多画面表示装置
WO2023162378A1 (fr) Élément optique et dispositif d'affichage d'image l'utilisant
JP2008102547A (ja) 二次元視野角拡大部材および表示装置
JP6277650B2 (ja) 導光板、面光源装置、映像源ユニット、及び液晶表示装置
JP2021039145A (ja) 光学構造体、光学構造体付き偏光板、表示装置及び光学構造体の製造方法
JP2017191175A (ja) 結像装置
JP2019133109A (ja) 光学素子及びそれを用いた映像表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17894116

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2018564175

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17894116

Country of ref document: EP

Kind code of ref document: A1