WO2006132047A1 - Élément optique et dispositif optique le comportant - Google Patents

Élément optique et dispositif optique le comportant Download PDF

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Publication number
WO2006132047A1
WO2006132047A1 PCT/JP2006/309394 JP2006309394W WO2006132047A1 WO 2006132047 A1 WO2006132047 A1 WO 2006132047A1 JP 2006309394 W JP2006309394 W JP 2006309394W WO 2006132047 A1 WO2006132047 A1 WO 2006132047A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical element
optical
prism
light
fitting hole
Prior art date
Application number
PCT/JP2006/309394
Other languages
English (en)
Japanese (ja)
Inventor
Minoru Onoda
Yoshiyuki Shimizu
Tomokazu Tokunaga
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2006132047A1 publication Critical patent/WO2006132047A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • G02B13/007—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror the beam folding prism having at least one curved surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/1805—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
    • G02B17/086—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors wherein the system is made of a single block of optical material, e.g. solid catadioptric systems

Definitions

  • the present invention relates to an optical element and an optical device including the same.
  • prisms have been widely used as means for refracting the optical axis (for example, Patent Document 1).
  • Patent Document 1 For example, in the case of a triangular prism, in order to attach and fix with high positional accuracy, it is usually attached so that the three surfaces come into contact with the folder member of the optical device (ie, are supported at three points).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 57-185401 —Problem to be Solved— When a prismatic prism is loaded and fixed in an optical device so that the three surfaces are in contact with the folder member, the three surfaces of the prism are fixed. As the prism contacts the folder member, the position of the prism is automatically determined, and the prism cannot be displaced or rotated after the prism is inserted. That is, it is difficult to adjust the position and angle of the prism after the prism is inserted, and the positioning accuracy of the prism is determined solely by the shape accuracy of the prism and the shape accuracy of the folder member.
  • the folder member is usually made of resin, and it is difficult to manufacture it with high shape accuracy that can realize high optical performance.
  • manufacturing costs will increase if folder members are made with high shape accuracy.
  • it is difficult to mount the conventional prism with high positional accuracy it is difficult to obtain an optical device having high optical performance easily and inexpensively by using the conventional prism! /, There is a problem.
  • the present invention has been made in view of such a point, and an object thereof is to provide an optical element that can be easily attached to an optical device with high positional accuracy. .
  • an optical element according to the present invention is a polygonal columnar optical element that is attached so that an upper surface and a lower surface are in contact with an optical device, and the upper surface and the lower surface are cylindrical peripheral surfaces. It is formed so as to constitute a part of!
  • the optical device according to the present invention can be inserted into a polygonal columnar optical element formed such that the upper surface and the lower surface constitute a part of the circumferential surface of the cylinder, and the upper surface and A folder member having a fitting hole into which the optical element is fitted and inserted so that the lower surface is in contact is provided.
  • FIG. 1 is a diagram illustrating an optical configuration of an imaging apparatus 10.
  • FIG. 2 is a perspective view of the optical element 1.
  • FIG. 3 is a perspective view of a folder member 11 to which an optical element 1 is attached.
  • FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a cross-sectional view of a portion cut out along a cutting line V—V in FIG.
  • FIG. 6 is a diagram illustrating an optical configuration of an imaging apparatus according to a modification.
  • the optical apparatus that implements the present invention will be described by taking the imaging apparatus 10 as an example.
  • the optical apparatus is not limited to the imaging apparatus, for example, an image projection apparatus, a light irradiation It may be a device or the like.
  • FIG. 1 is a diagram illustrating an optical configuration of an imaging apparatus 10 according to the present embodiment.
  • the imaging device 10 includes a first lens group 13, a second lens group 14, a third lens group 15, and an imaging element 16 arranged on the optical axis AX in this order from the image side.
  • the lens groups 13 to 15 are lens groups for forming an image on the image sensor 16.
  • the image sensor 16 is composed of, for example, ⁇ , CCD (charge coupled device), OMS (complementary metal-oxide semiconductor), and the like, and functions to convert an optical image formed by the lens groups 13 to 15 into electrical data.
  • Have Data converted into electrical data by the image sensor 16 The data is recorded on a recording medium (memory or the like) (not shown) or output to another device (not shown) according to the setting.
  • the imaging device 10 in which three lens groups 13 to 15 are arranged on the optical axis AX will be described as an example.
  • the lens group for forming an image on the imaging device 16 is described. May be one or two or more than four.
  • at least one of the lens groups for forming an image on the image sensor 16 is provided so as to be displaceable on the optical axis AX, and may be configured to be in focus and Z or variable in magnification.
  • an optical element 1 for refracting the optical axis AX between the first lens group 13 and the second lens group 14, and a lens positioned on the image side of the optical element 1 12 and V are arranged.
  • the thickness in the direction of the optical axis AX can be suppressed, and a relatively small imaging device 10 can be realized.
  • the optical element 1 and the lens 12 are attached to a folder member 11 made of, for example, a resin.
  • a folder member 11 made of, for example, a resin.
  • FIG. 2 is a perspective view of the optical element 1.
  • FIG. 3 is a perspective view of the folder member 11 to which the optical element 1 is attached.
  • FIG. 4 is a cross-sectional view of the portion taken along the section line IV-IV in FIG.
  • FIG. 5 is a cross-sectional view of a portion cut out along the cut line VV in FIG.
  • the optical element 1 is a prism having a prism shape (specifically, a triangular prism shape) in which the first side surface 2, the second side surface 3, and the third side surface 4 are optical function surfaces (light transmission surface or light reflection surface). is there.
  • the second side surface 3 and the first side surface 2 are configured as a light transmitting surface (light incident surface or light emitting surface)
  • the third side surface 4 is configured as a light reflecting surface. The light incident from the second side surface 3 is reflected by the third side surface 4 and is emitted from the first side surface 2.
  • each of the first side surface 2, the second side surface 3, and the third side surface 4 has an optical power that may be a surface that does not have optical power (for example, a plane). It may be a surface (a refracting surface such as a spherical surface, an aspherical surface, a free-form surface, or a diffractive surface). In particular, it is preferable that at least one of the first side surface 2 and the second side surface 3 which are light transmitting surfaces is a surface having optical power. According to this configuration, the optical element 1 is imaged in addition to the function of refracting the optical axis AX. Functions and the like can be further provided. Therefore, the number of constituent lenses can be reduced.
  • the imaging device 10 can be further reduced in size.
  • the first side surface 2 is a concave aspherical surface
  • the second side surface 3 and the third side surface 4 are flat surfaces.
  • the upper surface 5 and the lower surface 6 of the optical element 1 are cylindrical (specifically, the axis A (see FIG. 2) extending in the normal direction on the optical axis AX of the first side surface 2 is the center.
  • the optical element 1 is attached to the folder member 11 so that the upper surface 5 and the lower surface 6 thereof are in contact with each other.
  • the folder member 11 is a member for supporting and fixing the optical element 1, and is constituted by a plate-like body 11a and a rib.
  • Each of the plate-like bodies 11a and 1 lb has a recess, and the plate-like bodies 1 la and 1 lb are arranged so that the recesses face each other.
  • the plate-like body 11a and the concave portion of the rib ib form a fitting hole 11c into which the above-described upper surface 5 and lower surface 6 constitute a portion (hereinafter referred to as the column C). ing. Then, the optical element 1 is fitted and inserted and fixed in the fitting hole 11c so that the upper surface 5 and the lower surface 6 are in contact with the folder member 11. Therefore, the optical element 1 as described below can be attached with high positional accuracy. As a result, the imaging device 10 having high optical performance can be realized.
  • the upper surface 5 and the lower surface 6 are formed so as to constitute a part of the cylinder C, and the fitting hole 1 lc into which the cylindrical member can be inserted (fitted) into the folder member 11. Is formed. For this reason, in a state where the optical element 1 is fitted and inserted into the fitting hole 11c, the optical element 1 can rotate about the axis A. Therefore, the tilt adjustment of the second side surface 3 and the third side surface 4 with respect to the Y-axis and Z-axis (see Fig. 3) of the optical element 1 with the optical element 1 fitted in the fitting hole 11c (see FIG.
  • the optical element 1 can be fixed to the folder member 11 after the tilt adjustment is performed on a very small order (for example, 1 'order). Therefore, regardless of the shape accuracy of the folder member 11, the optical element 1 can be easily attached to the imaging device 10 with high positional accuracy. As a result, the imaging device 10 having high optical performance can be realized.
  • optical element 1 and other members of the imaging device 10 over time due to heat, external stress, or the like.
  • the optical element 1 is fixed to the folder member 11 during manufacturing or maintenance.
  • the law is not limited at all.
  • the optical element 1 and the folder member 11 may be fixed using a force shim adhesive or an energy curing resin (for example, an ultraviolet curing resin, a thermosetting resin, etc.).
  • the upper surface 5 and the lower surface 6 are formed so as to constitute a part of a cylinder whose central axis is the axis A extending in the direction of the central force normal to the first side surface 2!
  • the present invention is not limited to this configuration.
  • the upper surface 5 and the lower surface 6 may be formed so as to constitute a part of a circumferential surface of a cylinder whose central axis is an axis extending in the normal direction of the third side surface 4.
  • the material of the optical element 1 is not particularly limited.
  • the optical element 1 is, for example, a material that substantially has a glass force or a material that is substantially made of resin. May be. Among them, glass is excellent in homogeneity, light transmission, durability, weather resistance, etc., and is easy to process with relatively high precision, so the optical element 1 is also substantially glassy. It is preferable.
  • the optical element 1 made of glass is preferably formed by force press molding (specifically heat press molding) that can be produced by, for example, polishing. According to the press molding, the optical element 1 can be produced easily and inexpensively with high work efficiency.
  • the optical element 1 may have a quadrangular prism shape, a pentagonal prism shape, a hexagonal prism shape, or the like.
  • the corners and ridges may be chamfered or rounded.
  • the force optical element 1 described by taking the case where the optical element 1 is a prism as an example has the third side surface 4 as a light reflecting surface as shown in FIG. 6, for example. It may be a configured mirror. Even in this case, since the upper surface 5 and the lower surface 6 are formed so as to constitute a part of the circumferential surface of the cylinder, the optical axis AX of the third side surface 4 as the light reflecting surface after the optical element 1 is inserted.
  • the optical element 1 can be attached with high positional accuracy. As a result, a high-quality imaging device can be realized.
  • the present invention is useful for optical devices such as an imaging device (digital still camera (DSC), digital video camera (DVC), etc.) and a light emitting device.
  • an imaging device digital still camera (DSC), digital video camera (DVC), etc.
  • DVC digital video camera
  • DVC digital video camera

Abstract

Élément optique qui peut facilement être installé avec une précision de positionnement élevée dans un dispositif optique. L’élément optique (1) selon l’invention est conçu de sorte que sa surface supérieure (5) et sa surface inférieure (6) fassent partie de la surface circonférentielle d’un cylindre circulaire. Cet élément optique (1) est fixé dans et ajusté à un support (11), dans lequel est percé un trou de fixation (11c) dans lequel le cylindre circulaire peut être inséré, de sorte que la surface supérieure (5) et la surface inférieure (6) soient en contact avec le trou de fixation (11c). Dans un état où l’élément optique (11) est fixé dans le trou de fixation (11c), l’élément optique (1) peut tourner autour d’un axe A. Cela permet à l'élément optique (1) d'être ajusté au support (11) après avoir effectué un ajustement d'inclinaison d'une deuxième surface latérale (3) et d'une troisième surface latérale (4) d’un très faible ordre de grandeur.
PCT/JP2006/309394 2005-06-07 2006-05-10 Élément optique et dispositif optique le comportant WO2006132047A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005166639 2005-06-07
JP2005-166639 2005-06-07

Publications (1)

Publication Number Publication Date
WO2006132047A1 true WO2006132047A1 (fr) 2006-12-14

Family

ID=37498254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/309394 WO2006132047A1 (fr) 2005-06-07 2006-05-10 Élément optique et dispositif optique le comportant

Country Status (1)

Country Link
WO (1) WO2006132047A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4134719A1 (fr) * 2021-08-13 2023-02-15 Largan Precision Co. Ltd. Module de lentille optique et dispositif électronique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160401U (fr) * 1988-04-22 1989-11-07
JPH0829161A (ja) * 1994-07-15 1996-02-02 Keyence Corp 光方向変換装置およびそれを用いた光電スイッチ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160401U (fr) * 1988-04-22 1989-11-07
JPH0829161A (ja) * 1994-07-15 1996-02-02 Keyence Corp 光方向変換装置およびそれを用いた光電スイッチ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4134719A1 (fr) * 2021-08-13 2023-02-15 Largan Precision Co. Ltd. Module de lentille optique et dispositif électronique

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