WO2020004129A1 - Lens cap production method, lens cap production device, and lens cap - Google Patents

Lens cap production method, lens cap production device, and lens cap Download PDF

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Publication number
WO2020004129A1
WO2020004129A1 PCT/JP2019/024022 JP2019024022W WO2020004129A1 WO 2020004129 A1 WO2020004129 A1 WO 2020004129A1 JP 2019024022 W JP2019024022 W JP 2019024022W WO 2020004129 A1 WO2020004129 A1 WO 2020004129A1
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WO
WIPO (PCT)
Prior art keywords
lens
mold
cap
base material
hole
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PCT/JP2019/024022
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French (fr)
Japanese (ja)
Inventor
充 富田
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日本電気硝子株式会社
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Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Publication of WO2020004129A1 publication Critical patent/WO2020004129A1/en

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses

Definitions

  • the present invention relates to a lens cap manufacturing method, a lens cap manufacturing apparatus, and a lens cap used when forming a lens portion on a cap base material.
  • lens caps for increasing the efficiency of optical communication coupling have been widely used.
  • the lens cap is manufactured by providing a lens portion on a cap base material.
  • a method for manufacturing this type of lens cap is disclosed in, for example, Patent Document 1 and the like.
  • An object of the present invention is to provide a method for manufacturing a lens cap, a lens cap manufacturing apparatus, and a lens cap that can suppress variations in accuracy in forming a lens portion on a cap base material.
  • a method for manufacturing a lens cap that solves the above problem includes a cylindrical portion and a top provided at one end of the cylindrical portion between a first mold and a second mold that operate to approach and separate from each other.
  • a cap base material having a shape is arranged, and the lens base material arranged in the hole at the top portion of the cap base material is hot-pressed to form a shape along the molding surface of the first mold and the second mold.
  • the top portion of the cap substrate when the lens portion is formed on the cap substrate, the top portion of the cap substrate can be firmly supported by the support surface of the molding surface of the first mold. For this reason, when processing the lens base material into the lens portion by hot pressing, even if a load is applied from the lens base material to the top portion of the cap base material, the load can be supported by the support surface of the molding surface. This makes it difficult for the top portion of the cap base material to be warped, so that the lens portion can be accurately provided on the cap base material. Therefore, it is possible to suppress variations in accuracy in forming the lens portion on the cap base material.
  • the cap base material is disposed such that a surface of the top portion faces the fixed first mold and a back surface of the top portion faces the movable second mold.
  • the first mold is a lower mold and the second mold is an upper mold. According to this configuration, since the cap base can be set so as to be placed in the first mold, the cap base can be easily set in the first mold.
  • the concave portion includes a large-diameter hole formed such that an inner wall surface extends along a vertical direction, and a small-diameter hole formed at a smaller diameter while being located deeper than the large-diameter hole. It is preferably a stepped hole. According to this configuration, it is possible to form a locking portion of the lens portion with the cap base material by the large-diameter hole provided in the concave portion of the first mold.
  • the small-diameter hole provided in the first-type concave portion makes it possible to form a light-transmitting portion having a desired shape in the lens portion.
  • a lens cap manufacturing apparatus that solves the above problem has a cylindrical portion and a top provided at one end of the cylindrical portion between a first mold and a second mold that operate to approach and separate from each other.
  • a cap base material having a shape is arranged, and the lens base material arranged in the hole at the top of the cap base material is hot-pressed to form the lens into a shape along the molding surface of the first mold and the second mold.
  • a lens portion is formed so as to cover the hole, and on the molding surface of the first mold, a stepped concave portion serving as a mold of the lens portion;
  • a supporting surface for supporting the top portion is provided at the time of processing the lens base material, and when the lens portion is formed on the cap base material, the entire surface of the top portion excluding the hole periphery is supported by the supporting surface. Meanwhile, the molding surface of the second mold is removed from the cap base material.
  • the lens base material is thermally pressed at the state, the formation of the lens portion.
  • a lens cap that solves the above problem has a configuration including a cap base material formed in a single-sided bottomless cylindrical shape, and a lens portion attached to a hole at the top of the cap base material, wherein the lens portion A first locking portion that locks on the front surface of the top portion, and a second locking portion that locks on the back surface of the top portion, wherein the first locking portion and the second locking portion are formed.
  • the thickness of the top portion locked in between is d
  • the height of the first locking portion is h
  • the width of the first locking portion is w
  • H is set to a value of 0.08 to 0.40 mm
  • w is set to a value of 0.03 to 0.50.
  • FIG. 2 is a vertical cross-sectional view of the lens cap of one embodiment.
  • FIG. 3 is a perspective view of a lens cap.
  • FIG. 2 is a configuration diagram of a lens cap manufacturing apparatus. The top view which looked at the 1st type
  • (A)-(d) is a process drawing which shows the manufacturing procedure of a lens cap. Explanatory drawing of the manufacturing method of the lens cap of the positioning of a prior art.
  • FIG. 4 is an explanatory diagram of the lens cap manufacturing method of the embodiment.
  • the lens cap 1 includes a one-sided bottomless cylindrical cap base material 2 that forms a main body of the lens cap 1, and a lens portion 3 attached to the cap base material 2. .
  • the lens cap 1 is attached and fixed to, for example, a stem provided with an optical semiconductor element or the like, and in this attached state, airtightness of the space inside the cap is secured.
  • the lens cap 1 couples the optical communication between the optical semiconductor element inside the cap and the optical fiber outside the cap by the lens unit 3 with high efficiency.
  • the cap base material 2 includes a cylindrical portion 4 forming a body portion of the cap base material 2 and a top portion 5 formed so as to close one axial end of the cylindrical portion 4.
  • the cylindrical portion 4 has a cylindrical shape.
  • a flange portion 7 protruding radially outward of the cap base material 2 is formed in the entire circumferential direction.
  • a hole 8 to which the lens unit 3 is attached and fixed is formed through the center of the top 5.
  • a nickel-iron alloy and nickel plating are used as the material of the cap base material 2.
  • the lens unit 3 includes a first lens curved surface portion 9 located outside the lens cap 1 and a second lens curved surface portion 10 located inside the lens cap 1.
  • the first lens curved surface portion 9 and the second lens curved surface portion 10 are formed at positions where their axes coincide with each other, and the size of the first lens curved surface portion 9 in the radial direction is larger than that of the second lens curved surface portion 10. It is formed large.
  • the lens unit 3 has a first locking unit 11 that locks on the surface of the top 5 and a second locking unit 12 that locks on the back surface of the top 5.
  • the first locking portion 11 is formed on the entire periphery of the first lens curved surface portion 9 in the circumferential direction.
  • the second locking portion 12 is formed on the entire periphery of the second lens curved surface portion 10 in the circumferential direction.
  • the second locking portion 12 is formed to have a length protruding radially outward of the lens portion 3 from the first locking portion 11.
  • the lens portion 3 is attached and fixed to the cap base material 2 by locking the edge of the top portion 5 into a groove 13 formed between the first locking portion 11 and the second locking portion 12.
  • the thickness of the top part 5 locked between the first locking part 11 and the second locking part 12 is “d”, the height of the first locking part 11 is “h”, The width of one locking portion 11 is “w”.
  • the thickness d is preferably at least 0.08 mm, more preferably at least 0.10 mm, and most preferably at least 0.12 mm.
  • the thickness d is preferably 0.30 mm or less, more preferably 0.28 mm or less, and most preferably 0.26 mm or less. When it is 0.30 mm or less, the press productivity of the cap base material is improved.
  • the height h of the first locking portion 11 is preferably 0.08 mm or more, more preferably 0.11 mm or more, and most preferably 0.14 mm or more. When the thickness is 0.08 mm or more, the durability of the lens unit 3 against pressure at the time of thermal shock is improved.
  • the height h of the first locking portion 11 is preferably 0.40 mm or less, more preferably 0.35 mm or less, and most preferably 0.30 mm or less. In the case of 0.4 mm or less, it is easy to process so that the jig 34 does not contact the corner of the support surface 33.
  • the width w of the first locking portion 11 is preferably at least 0.03 mm, more preferably at least 0.5 mm, and most preferably at least 0.07 mm. When it is 0.03 mm or more, it is possible to more reliably prevent the lens from falling off the cap base material.
  • the width w of the first locking portion 11 is preferably 0.50 mm or less, more preferably 0.40 mm or less, and most preferably 0.30 mm or less. In the case of 0.50 mm or less, the deformation of the hole 8 during lens molding is less likely to occur, so that the focal length can be prevented from being out of order.
  • FIG. 3 shows an apparatus for manufacturing the lens cap 1 (lens cap manufacturing apparatus 20).
  • the lens cap manufacturing apparatus 20 of the present example includes a first mold 21 and a second mold 22 that are molds of the lens unit 3 formed on the cap base 2, a sleeve 23 that positions the cap base 2 in the radial direction, A stopper 24 serving as an outer frame of the lens cap manufacturing apparatus 20;
  • the first mold 21 and the second mold 22 are arranged on the same axis (on the axis L1) and are arranged to face each other.
  • the sleeve 23 and the stopper 24 are mounted on the first mold 21.
  • the first mold 21 is formed with a large-diameter base 25 at the lowermost stage, an intermediate step 26 formed on the upper surface of the base 25, and an upper surface of the intermediate step 26. And a projection 27.
  • the base 25, the intermediate step 26, and the protrusion 27 are arranged on the same axis.
  • the first mold 21 of the present example is a fixed mold whose position does not change and is a lower mold disposed below the second mold 22. As shown in FIG. 4, the first mold 21 is formed in a substantially disk shape.
  • the upper surface (the surface facing the second die 22) of the first die 21 (the protruding portion 27) is formed on the first die 21 side when the lens portion 3 of the cap base material 2 is formed.
  • Surface hereinafter referred to as a molding surface 28.
  • a stepped concave portion 29 serving as a mold of the lens portion 3 is formed.
  • a large-diameter hole 31 formed so that the inner wall surface 30 extends along the vertical direction, and a small-diameter hole 32 formed at a deeper position than the large-diameter hole 31 and having a small diameter are continuous. Stepped hole consisting of
  • the angle ⁇ formed by the inner wall surface 30 with respect to the vertical direction is preferably 90.1 ° or more, more preferably 90.2 ° or more, and 90.3 ° or more. ° or more is most preferable. If the angle is 90 ° or more, it is easy to remove the lens base material that has touched the inner wall surface 30 from the first mold 21 after molding the lens.
  • the angle ⁇ formed by the inner wall surface 30 is preferably 120 ° or less, more preferably 115 ° or less, and most preferably 110 ° or less. When the angle is 120 ° or less, the deformation of the hole 8 during molding of the lens is less likely to occur, so that the focal length can be prevented from being out of order.
  • the small diameter hole 32 is a portion that forms the first lens curved surface portion 9 and is formed in a curved surface shape.
  • a support surface 33 that supports the top 5 of the cap base 2 when the lens portion 3 is formed is provided on the molding surface 28 of the first mold 21.
  • the support surface 33 of the present example has a planar shape and is formed over the entire area around the concave portion 29.
  • the support surface 33 is formed in an area and a shape capable of supporting the entire region of the top portion 5 of the cap base material 2 excluding the periphery of the hole 8.
  • the small-diameter hole 32 of the concave portion 29 is formed by a polishing process of shaving the surface of the protruding portion 27 of the first die 21 with a jig 34.
  • This manufacturing method includes, for example, rotating the jig 34 about the axis L2 (the direction of the arrow R1 in FIG. 5) and rubbing the inside of the recess 29 (the direction of the arrow R2 in FIG. 5), The surface 28) is formed.
  • the second mold 22 includes a main body 35 and a protrusion 36 formed on the back surface of the main body 35.
  • the second mold 22 of the present example is a movable mold that approaches and separates from the first mold 21, and is an upper mold disposed above the first mold 21.
  • the main body 35 and the protrusion 36 are arranged on the same axis.
  • the back surface (the surface facing the first mold 21) of the second mold 22 (the protruding portion 36) is formed on the molding surface (hereinafter referred to as the molding surface 37) of the second mold 22 when the lens portion 3 of the cap base material 2 is formed.
  • the molding surface 37 is a portion where the second lens curved surface portion 10 is formed, and is formed in a curved shape.
  • the second mold 22 is formed in a substantially columnar shape.
  • a protrusion 38 is formed on the inner peripheral surface of the sleeve 23 so as to protrude in the entire circumferential direction, and a protrusion 39 of the first die 21 is formed in a central hole 39 of the protrusion 38. 27 are assembled.
  • the sleeve 23 is formed in a substantially cylindrical shape.
  • the stopper 24 is disposed on the upper surface of the base 25 of the first mold 21, and the first mold 21, the second mold 22, and the sleeve 23 are housed in the internal housing 40. It is assembled as follows. As shown in FIG. 8, the stopper 24 is formed in a substantially cylindrical shape.
  • the second die 22 is slid upward to open the inside of the sleeve 23, and the cap base material 2 is set on the lens cap manufacturing apparatus 20.
  • the cap base material 2 is set on the first mold 21 so as to face downward. That is, the cap base material 2 is set on the first mold 21 in a direction in which the opening 6 is located at the top and the top 5 is located at the bottom.
  • the cap 5 is placed so that the top 5 of the cap substrate 2 contacts the support surface 33 of the molding surface 28 of the first mold 21.
  • the cap base material 2 is positioned in the radial direction by arranging the outer peripheral surface thereof to face the inner peripheral surface of the sleeve 23. That is, the cap base material 2 is set so as to be fitted into the recess formed by the first mold 21 and the sleeve 23.
  • the lens base material 41 is set on the cap base material 2 set on the first mold 21.
  • the lens base material 41 of the present example is, for example, a ball member (sphere).
  • the cap base material 2 is arranged downward, the lens base material 41 is easily positioned in the hole 8 when the lens base material 41 is loaded. Therefore, setting of the lens base material 41 is easy.
  • the second mold 22 is moved downward toward the first mold 21 (in the direction of arrow R3 in FIG. 9).
  • the molding surface 37 of the second mold 22 is brought into contact with the lens base material 41.
  • the lens base material 41 is heated in an atmosphere and pressed (hot press working). This hot pressing may be performed in either a nitrogen atmosphere or an air atmosphere.
  • the lens base material 41 is thermally processed in a state where the molding surface 37 of the second mold 22 is separated from the cap base material 2. Then, when the lens base material 41 is softened by heating due to this thermal processing, the lens base material 41 is deformed according to the surrounding shape, and is processed into a required predetermined lens shape. After this heat processing, the lens unit 3 is cooled, and the lens cap 1 in which the cap base material 2 and the lens unit 3 are integrated is taken out from the lens cap manufacturing apparatus 20. Thus, the manufacture of the lens cap 1 is completed.
  • FIG. 10 illustrates a conventional method of manufacturing a positioned lens cap.
  • the molding surface 28 of the first mold 21 has an example in which the inner wall surface 30 of the large-diameter hole 31 of the concave portion 29 has a sloped (tapered) shape.
  • this manufacturing method since the width of the support surface 33 cannot be sufficiently ensured, an excessive load is applied to the top 5 of the cap base material 2 when the lens base material 41 is hot-pressed.
  • the width of the support surface 33 (this example corresponds to “D” shown in FIG. 5) is sufficiently ensured. For this reason, even when a load is applied from the lens preform 41 to the top 5 of the cap base material 2 during the hot pressing of the lens preform 41, the top 5 is firmly held by the support surface 33 over a wide range. Thereby, the periphery of the hole 8 in the top 5 is not unnecessarily deformed. Therefore, the focal length of the lens unit 3 is hardly fluctuated, and the focal length accuracy can be improved.
  • the top 5 of the cap substrate 2 can be firmly supported by the support surface 33 of the molding surface 28 of the first mold 21. Become.
  • the lens base material 41 is heated and processed into the lens portion 3, even if a load is applied from the lens base material 41 to the top 5 of the cap base material 2, the load is applied to the support surface 33 of the molding surface 28. It becomes possible to support. This makes it difficult for the top portion 5 of the cap base material 2 to be warped, and allows the lens portion 3 to be provided on the cap base material 2 with high accuracy. Therefore, it is possible to suppress variations in accuracy in forming the lens unit 3 on the cap base material 2. As a result, variations in the focal length of the lens unit 3 can also be suppressed.
  • the cap base material 2 is arranged such that the surface of the top 5 faces the fixed first mold 21 and the back surface of the top 5 faces the movable second mold 22.
  • the operation amount of the movable second die 22 (the amount of downward movement with respect to the first die 21) is adjusted.
  • the inner surface side (the second lens curved surface portion 10) of the lens portion 3 can be accurately processed. Therefore, it is advantageous for ensuring the accuracy of the focal length of the lens unit 3.
  • the cap base material 2 may be arranged so that the back surface of the top 5 faces the fixed first mold 21 and the surface of the top 5 faces the movable second mold 22. Even in this case, it is possible to support the load when the load is applied from the lens base material 41 to the top 5 of the cap base material 2 by the support surface 33 of the molding surface 28. This makes it difficult for the top portion 5 of the cap base material 2 to be warped, and allows the lens portion 3 to be provided on the cap base material 2 with high accuracy. Therefore, it is possible to suppress variations in accuracy in forming the lens unit 3 on the cap base material 2.
  • the first mold 21 is a lower mold
  • the second mold 22 is an upper mold. Therefore, it is possible to set the cap base material 2 so as to be placed on the first mold 21, so that the cap base material 2 can be easily set on the first mold 21.
  • the recess 29 has a stepped portion in which a large-diameter hole 31 formed so that the inner wall surface 30 extends along the vertical direction and a small-diameter hole 32 formed at a smaller diameter while being located deeper than the large-diameter hole 31. It is a hole. Therefore, the large-diameter hole 31 of the concave portion 29 can form a locking portion (the first locking portion 11) of the lens portion 3 with the cap base material 2. Further, a light transmitting portion (first lens curved surface portion 9) having a desired shape in the lens portion 3 can be formed by the small diameter hole 32 of the concave portion 29.
  • the heating source of the lens base material 41 may be arranged so as to cover the outer periphery of the stopper 24, or may be arranged at other places.
  • the hot pressing of the lens base material 41 is not limited to the method of pressing by heating in an atmosphere, but may be, for example, a method of using a laser (laser softening).
  • the second locking portion 12 may have a shape formed on the entire back surface of the top portion 5 of the cap base material 2.
  • the support surface 33 and the concave portion 29 of the first mold 21 only need to have a shape capable of firmly supporting the top 5 of the cap base material 2 when the lens portion 3 is manufactured.
  • the shape of the concave portion 29 is not limited to the stepped shape (counterbore shape) having the large-diameter hole 31 and the small-diameter hole 32 as in this example, and the top portion 5 of the cap base material 2 is supported while the lens portion 3 is molded. Any shape can be used as long as the shape of the necessary lens portion 3 can be formed.
  • the material of the cap base material 2 may be appropriately changed to a type other than the embodiment.
  • SUS430, SUS430F, SF-20F, SF-20T and the like can be mentioned.
  • the material of the cap substrate 2 may be made of a metal material other than the SUS material, or may be made of an alloy of nickel and iron.
  • the sleeve 23 may have a divided structure in which the main body portion of the sleeve 23 and the projection 38 are separate members.
  • the lens cap manufacturing apparatus 20 is not limited to the structure having the first mold 21, the second mold 22, the sleeve 23, and the stopper 24, and other structures are applicable.
  • the sleeve 23 and the stopper 24 can be appropriately changed to those having shapes and structures other than those of the embodiment.
  • the lens cap manufacturing apparatus 20 does not necessarily need to include the sleeve 23 and the stopper 24, and may be any apparatus having a member having the same function.
  • mold 22 may replace a lower type
  • the region of the top portion 5 supported by the support surface 33 that is, the entire region excluding the periphery of the hole 8 only needs to have an area necessary for preventing warpage of the cap base material 2 during processing.
  • the lens cap manufacturing apparatus 20 manufactures the lens cap 1 by setting the front side of the cap base 2 toward the second mold 22 and the back side of the cap base 2 toward the first mold 21. May be.
  • the lens cap manufacturing apparatus 20 can be appropriately changed to an embodiment other than the embodiment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Lens Barrels (AREA)

Abstract

This lens cap production device (20) is provided with: a first mold (21) which serves as a fixed mold; and a second mold (22) which serves as a movable mold. The first mold (21) has formed therein a molding surface (28) which serves as a mold form when a lens part (3) is provided to a cap base material (2). The molding surface (28) is provided with: a stepped recess (29) which serves as a mold form for the lens part (3); and a support surface (33) which supports a crown (5) of the cap base material (2) during the formation of the lens part (3). The stepped recess (29) is formed in so-called countersunk shape.

Description

レンズキャップ製造方法、レンズキャップ製造装置及びレンズキャップLens cap manufacturing method, lens cap manufacturing apparatus, and lens cap
　本発明は、キャップ基材にレンズ部を形成する際に用いられるレンズキャップ製造方法、レンズキャップ製造装置及びレンズキャップに関する。 The present invention relates to a lens cap manufacturing method, a lens cap manufacturing apparatus, and a lens cap used when forming a lens portion on a cap base material.
　従来、光通信分野では、光通信の結合を高効率化するレンズキャップが広く使用されている。レンズキャップは、キャップ基材にレンズ部を設けることにより製造されている。この種のレンズキャップの製造方法としては、例えば特許文献１等に開示がある。 Conventionally, in the field of optical communication, lens caps for increasing the efficiency of optical communication coupling have been widely used. The lens cap is manufactured by providing a lens portion on a cap base material. A method for manufacturing this type of lens cap is disclosed in, for example, Patent Document 1 and the like.
特開２００７－３１０３７９号公報JP 2007-310379 A
　ところで、レンズ部がキャップ基材に精度よく形成されないと、レンズ部の焦点距離が変動してしまう問題があった。よって、レンズ部をキャップ基材に精度よく製造することができる技術開発のニーズがあった。 By the way, if the lens portion is not formed on the cap base material with accuracy, there is a problem that the focal length of the lens portion varies. Therefore, there has been a need for technical development capable of accurately manufacturing a lens portion on a cap base material.
　本発明の目的は、キャップ基材にレンズ部を形成するにあたっての精度ばらつきの抑制を可能にしたレンズキャップ製造方法、レンズキャップ製造装置及びレンズキャップを提供することにある。 An object of the present invention is to provide a method for manufacturing a lens cap, a lens cap manufacturing apparatus, and a lens cap that can suppress variations in accuracy in forming a lens portion on a cap base material.
　前記問題点を解決するレンズキャップ製造方法は、互いに接近及び離隔するように作動する第１型及び第２型との間に、筒部と当該筒部の片側端に設けられた頂部とを有する形状のキャップ基材を配置し、当該キャップ基材の前記頂部の孔に配置されたレンズ母材を熱プレス加工して、前記第１型及び前記第２型の成型面に沿った形状に前記レンズ母材を形状変形させることで、前記孔を覆うようにレンズ部を形成する方法であって、前記第１型の成型面に、前記レンズ部の型枠となる段状の凹部と、前記レンズ母材の加工時に前記頂部を支持する支持面とを設け、前記頂部において孔周囲を除いた部位全域を前記支持面で支持しつつ、前記第２型の成型面を前記キャップ基材から離した状態で前記レンズ母材を熱プレス加工することにより、前記キャップ基材に前記レンズ部を形成する。 A method for manufacturing a lens cap that solves the above problem includes a cylindrical portion and a top provided at one end of the cylindrical portion between a first mold and a second mold that operate to approach and separate from each other. A cap base material having a shape is arranged, and the lens base material arranged in the hole at the top portion of the cap base material is hot-pressed to form a shape along the molding surface of the first mold and the second mold. A method of forming a lens portion so as to cover the hole by deforming a shape of a lens base material, wherein a stepped concave portion serving as a mold of the lens portion is formed on a molding surface of the first mold, A supporting surface for supporting the top portion during the processing of the lens base material, and the entire surface of the top portion except for the periphery of the hole is supported by the supporting surface, and the molding surface of the second mold is separated from the cap base material. By hot pressing the lens base material in the To form the lens portion in the cap base.
　本構成によれば、キャップ基材にレンズ部を形成する場合、キャップ基材の頂部を、第１型の成型面の支持面によってしっかりと支持することが可能となる。このため、レンズ母材を熱プレスによりレンズ部に加工する場合に、レンズ母材からキャップ基材の頂部に荷重がかかっても、この荷重を成型面の支持面で支えることが可能となる。これにより、キャップ基材の頂部に反りが生じ難くなり、レンズ部をキャップ基材に精度よく設けることが可能となる。よって、キャップ基材にレンズ部を形成するにあたっての精度ばらつきを抑制することが可能となる。 According to this configuration, when the lens portion is formed on the cap substrate, the top portion of the cap substrate can be firmly supported by the support surface of the molding surface of the first mold. For this reason, when processing the lens base material into the lens portion by hot pressing, even if a load is applied from the lens base material to the top portion of the cap base material, the load can be supported by the support surface of the molding surface. This makes it difficult for the top portion of the cap base material to be warped, so that the lens portion can be accurately provided on the cap base material. Therefore, it is possible to suppress variations in accuracy in forming the lens portion on the cap base material.
　前記レンズキャップ製造方法において、前記キャップ基材は、前記頂部の表面が固定型の前記第１型を向き、前記頂部の裏面が可動型の前記第２型を向くように配置されることが好ましい。この構成によれば、キャップ基材にレンズ部を形成するに際し、可動型である第２型の作動量を調節するなどして、レンズ部の内面側を精度よく加工することが可能となる。よって、レンズ部の焦点距離の精度確保に有利となる。 In the lens cap manufacturing method, it is preferable that the cap base material is disposed such that a surface of the top portion faces the fixed first mold and a back surface of the top portion faces the movable second mold. . According to this configuration, when forming the lens portion on the cap base material, it is possible to accurately process the inner surface side of the lens portion by adjusting the operation amount of the movable second die. Therefore, it is advantageous for ensuring the accuracy of the focal length of the lens unit.
　前記レンズキャップ製造方法において、前記第１型は、下型であり、前記第２型は、上型であることが好ましい。この構成によれば、キャップ基材を第１型に置くようにしてセットすることが可能となるので、キャップ基材を簡単に第１型にセットすることが可能となる。 In the method for manufacturing a lens cap, it is preferable that the first mold is a lower mold and the second mold is an upper mold. According to this configuration, since the cap base can be set so as to be placed in the first mold, the cap base can be easily set in the first mold.
　前記レンズキャップ製造方法において、前記凹部は、内壁面が鉛直方向に沿うように形成された大径穴と、当該大径穴よりも奥に位置しつつ小径に形成された小径穴とが連続してなる段付き穴であることが好ましい。この構成によれば、第１型の凹部に設けられた大径穴によって、レンズ部におけるキャップ基材との係止箇所を形成することが可能となる。また、第１型の凹部に設けられた小径穴によって、レンズ部における所望の形状の光透過箇所を形成することが可能となる。 In the lens cap manufacturing method, the concave portion includes a large-diameter hole formed such that an inner wall surface extends along a vertical direction, and a small-diameter hole formed at a smaller diameter while being located deeper than the large-diameter hole. It is preferably a stepped hole. According to this configuration, it is possible to form a locking portion of the lens portion with the cap base material by the large-diameter hole provided in the concave portion of the first mold. In addition, the small-diameter hole provided in the first-type concave portion makes it possible to form a light-transmitting portion having a desired shape in the lens portion.
　前記問題点を解決するレンズキャップ製造装置は、互いに接近及び離隔するように作動する第１型及び第２型との間に、筒部と当該筒部の片側端に設けられた頂部とを有する形状のキャップ基材を配置し、当該キャップ基材の頂部の孔に配置されたレンズ母材を熱プレス加工して、前記第１型及び前記第２型の成型面に沿った形状に前記レンズ母材を形状変形させることで、前記孔を覆うようにレンズ部を形成する構成であって、前記第１型の成型面には、前記レンズ部の型枠となる段状の凹部と、前記レンズ母材の加工時に前記頂部を支持する支持面とが設けられ、前記キャップ基材に前記レンズ部を形成する場合には、前記頂部において孔周囲を除いた部位全域を前記支持面で支持しつつ、前記第２型の成型面を前記キャップ基材から離した状態で前記レンズ母材を熱プレス加工することにより、前記レンズ部の形成を行う。 A lens cap manufacturing apparatus that solves the above problem has a cylindrical portion and a top provided at one end of the cylindrical portion between a first mold and a second mold that operate to approach and separate from each other. A cap base material having a shape is arranged, and the lens base material arranged in the hole at the top of the cap base material is hot-pressed to form the lens into a shape along the molding surface of the first mold and the second mold. By deforming the shape of the base material, a lens portion is formed so as to cover the hole, and on the molding surface of the first mold, a stepped concave portion serving as a mold of the lens portion; A supporting surface for supporting the top portion is provided at the time of processing the lens base material, and when the lens portion is formed on the cap base material, the entire surface of the top portion excluding the hole periphery is supported by the supporting surface. Meanwhile, the molding surface of the second mold is removed from the cap base material. By the lens base material is thermally pressed at the state, the formation of the lens portion.
　前記問題点を解決するレンズキャップは、片側無底筒状に形成されたキャップ基材と、当該キャップ基材の頂部の孔に組み付けられたレンズ部とを備えた構成であって、前記レンズ部には、前記頂部の表面に係止する第１係止部と、前記頂部の裏面に係止する第２係止部とが形成され、前記第１係止部及び前記第２係止部の間に係止された前記頂部の厚さをｄ、前記第１係止部の高さをｈ、前記第１係止部の幅をｗとした場合、ｄが０．０８～０．３０ｍｍの値に設定され、ｈが０．０８～０．４０ｍｍの値に設定され、ｗが０．０３～０．５０の値に設定されている。 A lens cap that solves the above problem has a configuration including a cap base material formed in a single-sided bottomless cylindrical shape, and a lens portion attached to a hole at the top of the cap base material, wherein the lens portion A first locking portion that locks on the front surface of the top portion, and a second locking portion that locks on the back surface of the top portion, wherein the first locking portion and the second locking portion are formed. When the thickness of the top portion locked in between is d, the height of the first locking portion is h, and the width of the first locking portion is w, d is 0.08 to 0.30 mm. H is set to a value of 0.08 to 0.40 mm, and w is set to a value of 0.03 to 0.50.
　本発明によれば、キャップ基材にレンズ部を形成するにあたっての精度ばらつきを抑制することができる。 According to the present invention, it is possible to suppress variations in accuracy in forming a lens portion on a cap base material.
一実施形態のレンズキャップの縦断面図。FIG. 2 is a vertical cross-sectional view of the lens cap of one embodiment. レンズキャップの斜視図。FIG. 3 is a perspective view of a lens cap. レンズキャップ製造装置の構成図。FIG. 2 is a configuration diagram of a lens cap manufacturing apparatus. 第１型を成型面側から見た平面図。The top view which looked at the 1st type | mold from the molding surface side. 第１型の成型面の作り方を示す説明図。Explanatory drawing which shows how to make the molding surface of a 1st type | mold. 第２型を成型面側から見た平面図。The top view which looked at the 2nd type | mold from the molding surface side. スリーブの平面図。The top view of a sleeve. ストッパの平面図。The top view of a stopper. （ａ）～（ｄ）はレンズキャップの製造手順を示す工程図。(A)-(d) is a process drawing which shows the manufacturing procedure of a lens cap. 従来技術の位置付けのレンズキャップ製造方法の説明図。Explanatory drawing of the manufacturing method of the lens cap of the positioning of a prior art. 実施形態のレンズキャップ製造方法の説明図。FIG. 4 is an explanatory diagram of the lens cap manufacturing method of the embodiment.
　以下、レンズキャップ製造方法、レンズキャップ製造装置及びレンズキャップの一実施形態を図１～図１１に従って説明する。
　図１及び図２に示すように、レンズキャップ１は、レンズキャップ１の本体部分をなす片側無底筒状のキャップ基材２と、このキャップ基材２に取り付けられたレンズ部３とを備える。レンズキャップ１は、例えば光学半導体素子等が設けられたステムに取り付け固定されるとともに、この取り付け状態においてキャップ内部の空間の気密性を確保する。レンズキャップ１は、キャップ内の光学半導体素子とキャップ外の光ファイバーとの間の光通信を、レンズ部３によって高効率で結合させる。 Hereinafter, an embodiment of a lens cap manufacturing method, a lens cap manufacturing apparatus, and a lens cap will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the lens cap 1 includes a one-sided bottomless cylindrical cap base material 2 that forms a main body of the lens cap 1, and a lens portion 3 attached to the cap base material 2. . The lens cap 1 is attached and fixed to, for example, a stem provided with an optical semiconductor element or the like, and in this attached state, airtightness of the space inside the cap is secured. The lens cap 1 couples the optical communication between the optical semiconductor element inside the cap and the optical fiber outside the cap by the lens unit 3 with high efficiency.
　キャップ基材２は、キャップ基材２の胴体部分をなす筒部４と、筒部４の軸方向一方端を閉じるように形成された頂部５とを備える。筒部４は、円筒形状をなしている。筒部４の軸方向他方端に形成された開口６の周囲には、キャップ基材２の径方向外側に突出したフランジ部７が周方向全域に形成されている。頂部５の中央には、レンズ部３が取り付け固定される孔８が貫設されている。キャップ基材２の材質は、例えばニッケル鉄合金及びニッケルメッキが使用されている。 The cap base material 2 includes a cylindrical portion 4 forming a body portion of the cap base material 2 and a top portion 5 formed so as to close one axial end of the cylindrical portion 4. The cylindrical portion 4 has a cylindrical shape. Around the opening 6 formed at the other end in the axial direction of the cylindrical portion 4, a flange portion 7 protruding radially outward of the cap base material 2 is formed in the entire circumferential direction. A hole 8 to which the lens unit 3 is attached and fixed is formed through the center of the top 5. As the material of the cap base material 2, for example, a nickel-iron alloy and nickel plating are used.
　レンズ部３は、レンズキャップ１の外部に位置する第１レンズ曲面部９と、レンズキャップ１の内部に位置する第２レンズ曲面部１０とを備える。第１レンズ曲面部９及び第２レンズ曲面部１０は、互いの軸が一致する位置に形成されるとともに、第２レンズ曲面部１０よりも第１レンズ曲面部９の方が径方向のサイズが大きく形成されている。 The lens unit 3 includes a first lens curved surface portion 9 located outside the lens cap 1 and a second lens curved surface portion 10 located inside the lens cap 1. The first lens curved surface portion 9 and the second lens curved surface portion 10 are formed at positions where their axes coincide with each other, and the size of the first lens curved surface portion 9 in the radial direction is larger than that of the second lens curved surface portion 10. It is formed large.
　レンズ部３には、頂部５の表面に係止する第１係止部１１と、頂部５の裏面に係止する第２係止部１２とが形成されている。第１係止部１１は、第１レンズ曲面部９の周縁において周方向の全体に亘って形成されている。第２係止部１２は、第２レンズ曲面部１０の周縁において周方向の全体に亘って形成されている。本例の場合、第２係止部１２は、第１係止部１１よりもレンズ部３の径方向外側に突出する長さに形成されている。レンズ部３は、第１係止部１１及び第２係止部１２の間にできる溝部１３に頂部５の縁部が係止されることにより、キャップ基材２に取り付け固定されている。 The lens unit 3 has a first locking unit 11 that locks on the surface of the top 5 and a second locking unit 12 that locks on the back surface of the top 5. The first locking portion 11 is formed on the entire periphery of the first lens curved surface portion 9 in the circumferential direction. The second locking portion 12 is formed on the entire periphery of the second lens curved surface portion 10 in the circumferential direction. In the case of this example, the second locking portion 12 is formed to have a length protruding radially outward of the lens portion 3 from the first locking portion 11. The lens portion 3 is attached and fixed to the cap base material 2 by locking the edge of the top portion 5 into a groove 13 formed between the first locking portion 11 and the second locking portion 12.
　ここで、第１係止部１１及び第２係止部１２の間に係止された頂部５の厚さを「ｄ」とし、第１係止部１１の高さを「ｈ」とし、第１係止部１１の幅を「ｗ」とする。この場合、厚さｄは０．０８ｍｍ以上であることが好ましく、０．１０ｍｍ以上であることが更に好ましく、０．１２ｍｍ以上であることが最も好ましい。０．０８ｍｍ以上の場合には、溶接に伴う衝撃に対するレンズ部３の耐久性が向上することにより、キャップ内部の空間の気密性をより確実に維持することができる。また厚さｄは０．３０ｍｍ以下であることが好ましく、０．２８ｍｍ以下であることが更に好ましく、０．２６ｍｍ以下であることが最も好ましい。０．３０ｍｍ以下の場合には、キャップ基材のプレス生産性が向上する。 Here, the thickness of the top part 5 locked between the first locking part 11 and the second locking part 12 is “d”, the height of the first locking part 11 is “h”, The width of one locking portion 11 is “w”. In this case, the thickness d is preferably at least 0.08 mm, more preferably at least 0.10 mm, and most preferably at least 0.12 mm. When the thickness is 0.08 mm or more, the airtightness of the space inside the cap can be more reliably maintained by improving the durability of the lens unit 3 against the impact caused by welding. Further, the thickness d is preferably 0.30 mm or less, more preferably 0.28 mm or less, and most preferably 0.26 mm or less. When it is 0.30 mm or less, the press productivity of the cap base material is improved.
　第１係止部１１の高さｈは０．０８ｍｍ以上であることが好ましく、０．１１ｍｍ以上であることが更に好ましく、０．１４ｍｍ以上であることが最も好ましい。０．０８ｍｍ以上の場合には、熱衝撃時の圧力に対するレンズ部３の耐久性が向上する。また、第１係止部１１の高さｈは、０．４０ｍｍ以下であることが好ましく、０．３５ｍｍ以下であることが更に好ましく、０．３０ｍｍ以下であることが最も好ましい。０．４ｍｍ以下の場合には、治具３４が支持面３３の角に接触しないように加工するのが容易である。 高 The height h of the first locking portion 11 is preferably 0.08 mm or more, more preferably 0.11 mm or more, and most preferably 0.14 mm or more. When the thickness is 0.08 mm or more, the durability of the lens unit 3 against pressure at the time of thermal shock is improved. The height h of the first locking portion 11 is preferably 0.40 mm or less, more preferably 0.35 mm or less, and most preferably 0.30 mm or less. In the case of 0.4 mm or less, it is easy to process so that the jig 34 does not contact the corner of the support surface 33.
　第１係止部１１の幅ｗは０．０３ｍｍ以上であることが好ましく、０．５ｍｍ以上であることが更に好ましく、０．０７ｍｍ以上であることが最も好ましい。０．０３ｍｍ以上の場合には、キャップ基材からのレンズの抜け落ちをより確実に防ぐことができる。また、第１係止部１１の幅ｗは０．５０ｍｍ以下であることが好ましく、０．４０ｍｍ以下であることが更に好ましく、０．３０ｍｍ以下であることが最も好ましい。０．５０ｍｍ以下の場合には、レンズ成型時に孔８の変形が起こりにくくなることにより、焦点距離の狂いをより確実に防ぐことができる。 幅 The width w of the first locking portion 11 is preferably at least 0.03 mm, more preferably at least 0.5 mm, and most preferably at least 0.07 mm. When it is 0.03 mm or more, it is possible to more reliably prevent the lens from falling off the cap base material. The width w of the first locking portion 11 is preferably 0.50 mm or less, more preferably 0.40 mm or less, and most preferably 0.30 mm or less. In the case of 0.50 mm or less, the deformation of the hole 8 during lens molding is less likely to occur, so that the focal length can be prevented from being out of order.
　図３に、レンズキャップ１の製造装置（レンズキャップ製造装置２０）を図示する。本例のレンズキャップ製造装置２０は、キャップ基材２に形成するレンズ部３の型枠となる第１型２１及び第２型２２と、キャップ基材２を径方向から位置決めするスリーブ２３と、レンズキャップ製造装置２０の外枠となるストッパ２４とを備える。第１型２１及び第２型２２は、同一軸心上（軸Ｌ１上）に配置されるとともに、互いに対向する向きに配置されている。スリーブ２３及びストッパ２４は、第１型２１に載置されている。 FIG. 3 shows an apparatus for manufacturing the lens cap 1 (lens cap manufacturing apparatus 20). The lens cap manufacturing apparatus 20 of the present example includes a first mold 21 and a second mold 22 that are molds of the lens unit 3 formed on the cap base 2, a sleeve 23 that positions the cap base 2 in the radial direction, A stopper 24 serving as an outer frame of the lens cap manufacturing apparatus 20; The first mold 21 and the second mold 22 are arranged on the same axis (on the axis L1) and are arranged to face each other. The sleeve 23 and the stopper 24 are mounted on the first mold 21.
　図３及び図４に示すように、第１型２１は、最下段の大径の基部２５と、基部２５の上面に形成された中間段部２６と、中間段部２６の上面に形成された突出部２７とを備える。基部２５、中間段部２６及び突出部２７は、同一軸心上に配置されている。本例の第１型２１は、位置が不変である固定型であるとともに、第２型２２に対して下方に配置された下型である。図４に示すように、第１型２１は、略円板状に形成されている。 As shown in FIGS. 3 and 4, the first mold 21 is formed with a large-diameter base 25 at the lowermost stage, an intermediate step 26 formed on the upper surface of the base 25, and an upper surface of the intermediate step 26. And a projection 27. The base 25, the intermediate step 26, and the protrusion 27 are arranged on the same axis. The first mold 21 of the present example is a fixed mold whose position does not change and is a lower mold disposed below the second mold 22. As shown in FIG. 4, the first mold 21 is formed in a substantially disk shape.
　図３に示すように、第１型２１（突出部２７）の上面（第２型２２と対向する面）は、キャップ基材２のレンズ部３を形成する際の第１型２１側の成型面（以降、成型面２８と記す）となっている。成型面２８には、レンズ部３の型枠となる段状の凹部２９が形成されている。本例の凹部２９は、内壁面３０が鉛直方向に沿うように形成された大径穴３１と、この大径穴３１よりも奥に位置しつつ小径に形成された小径穴３２とが連続して成る段付き穴である。 As shown in FIG. 3, the upper surface (the surface facing the second die 22) of the first die 21 (the protruding portion 27) is formed on the first die 21 side when the lens portion 3 of the cap base material 2 is formed. Surface (hereinafter referred to as a molding surface 28). On the molding surface 28, a stepped concave portion 29 serving as a mold of the lens portion 3 is formed. In the concave portion 29 of this example, a large-diameter hole 31 formed so that the inner wall surface 30 extends along the vertical direction, and a small-diameter hole 32 formed at a deeper position than the large-diameter hole 31 and having a small diameter are continuous. Stepped hole consisting of
　本例の場合、鉛直方向（図３の基準線Ｌａ）に対して内壁面３０の成す角θは、９０．１°以上であることが好ましく、９０．２°以上が更に好ましく、９０．３°以上が最も好ましい。９０°以上の場合には、レンズ成型後に内壁面３０にふれたレンズ母材を第１型２１から取り外すのが容易である。また、内壁面３０の成す角θは、１２０°以下が好ましく、１１５°以下が更に好ましく、１１０°以下が最も好ましい。１２０°以下の場合には、レンズ成型時に孔８の変形が起こりにくくなることにより、焦点距離の狂いをより確実に防ぐことができる。小径穴３２は、第１レンズ曲面部９を形成する部位であって、曲面状に形成されている。 In the case of this example, the angle θ formed by the inner wall surface 30 with respect to the vertical direction (the reference line La in FIG. 3) is preferably 90.1 ° or more, more preferably 90.2 ° or more, and 90.3 ° or more. ° or more is most preferable. If the angle is 90 ° or more, it is easy to remove the lens base material that has touched the inner wall surface 30 from the first mold 21 after molding the lens. The angle θ formed by the inner wall surface 30 is preferably 120 ° or less, more preferably 115 ° or less, and most preferably 110 ° or less. When the angle is 120 ° or less, the deformation of the hole 8 during molding of the lens is less likely to occur, so that the focal length can be prevented from being out of order. The small diameter hole 32 is a portion that forms the first lens curved surface portion 9 and is formed in a curved surface shape.
　第１型２１の成型面２８には、レンズ部３の形成時にキャップ基材２の頂部５を支持する支持面３３が設けられている。本例の支持面３３は、平面状をなすとともに、凹部２９の周囲全域に亘って形成されている。支持面３３は、キャップ基材２の頂部５において孔８周囲を除いた部位全域を支持できる面積及び形状に形成されている。 支持 A support surface 33 that supports the top 5 of the cap base 2 when the lens portion 3 is formed is provided on the molding surface 28 of the first mold 21. The support surface 33 of the present example has a planar shape and is formed over the entire area around the concave portion 29. The support surface 33 is formed in an area and a shape capable of supporting the entire region of the top portion 5 of the cap base material 2 excluding the periphery of the hole 8.
　図５に示すように、凹部２９（成型面２８）の小径穴３２は、治具３４によって第１型２１の突出部２７の表面を削る研磨加工によって形成される。この製造方法としては、例えば治具３４を軸Ｌ２回り（図５の矢印Ｒ１方向）に回転させつつ、凹部２９内を擦るよう（図５の矢印Ｒ２方向）に作動させながら、凹部２９（成型面２８）を形成する。この製造方法の場合、治具３４が支持面３３の角に接触しないようにするために、大径穴３１の底面の幅Ｄを、ある程度確保することが好ましい。 (5) As shown in FIG. 5, the small-diameter hole 32 of the concave portion 29 (molding surface 28) is formed by a polishing process of shaving the surface of the protruding portion 27 of the first die 21 with a jig 34. This manufacturing method includes, for example, rotating the jig 34 about the axis L2 (the direction of the arrow R1 in FIG. 5) and rubbing the inside of the recess 29 (the direction of the arrow R2 in FIG. 5), The surface 28) is formed. In the case of this manufacturing method, it is preferable to secure a certain width D of the bottom surface of the large-diameter hole 31 so that the jig 34 does not contact the corner of the support surface 33.
　図３及び図６に示すように、第２型２２は、本体部３５と、本体部３５の裏面に形成された突出部３６とを備える。本例の第２型２２は、第１型２１に対して接近及び離間する可動型であり、第１型２１に対して上方に配置された上型である。本体部３５及び突出部３６は、同一軸心上に配置されている。第２型２２（突出部３６）の裏面（第１型２１と対向する面）は、キャップ基材２のレンズ部３を形成する際の第２型２２側の成型面（以降、成型面３７と記す）となっている。成型面３７は、第２レンズ曲面部１０を形成する部位であって、曲面状に形成されている。図６に示すように、第２型２２は、略円柱状に形成されている。 As shown in FIGS. 3 and 6, the second mold 22 includes a main body 35 and a protrusion 36 formed on the back surface of the main body 35. The second mold 22 of the present example is a movable mold that approaches and separates from the first mold 21, and is an upper mold disposed above the first mold 21. The main body 35 and the protrusion 36 are arranged on the same axis. The back surface (the surface facing the first mold 21) of the second mold 22 (the protruding portion 36) is formed on the molding surface (hereinafter referred to as the molding surface 37) of the second mold 22 when the lens portion 3 of the cap base material 2 is formed. Written). The molding surface 37 is a portion where the second lens curved surface portion 10 is formed, and is formed in a curved shape. As shown in FIG. 6, the second mold 22 is formed in a substantially columnar shape.
　図３及び図７に示すように、スリーブ２３の内周面には、周方向全域において突出する突部３８が形成され、その突部３８の中央の孔部３９に第１型２１の突出部２７が組み付けられている。図７に示すように、スリーブ２３は、略円筒形状に形成されている。 As shown in FIGS. 3 and 7, a protrusion 38 is formed on the inner peripheral surface of the sleeve 23 so as to protrude in the entire circumferential direction, and a protrusion 39 of the first die 21 is formed in a central hole 39 of the protrusion 38. 27 are assembled. As shown in FIG. 7, the sleeve 23 is formed in a substantially cylindrical shape.
　図３及び図８に示すように、ストッパ２４は、第１型２１の基部２５の上面に配置されるとともに、内部の収納部４０に第１型２１、第２型２２及びスリーブ２３が収納されるように組み付けられている。図８に示すように、ストッパ２４は、略円筒形状に形成されている。 As shown in FIGS. 3 and 8, the stopper 24 is disposed on the upper surface of the base 25 of the first mold 21, and the first mold 21, the second mold 22, and the sleeve 23 are housed in the internal housing 40. It is assembled as follows. As shown in FIG. 8, the stopper 24 is formed in a substantially cylindrical shape.
　続いて、図９を用いて、レンズキャップ１の製造手順について説明する。
　図９（ａ）に示すように、第２型２２を上方向にスライド移動してスリーブ２３の内部を開放した状態にしておき、レンズキャップ製造装置２０にキャップ基材２をセットする。本例の場合、キャップ基材２は、下向きにして第１型２１にセットされる。すなわち、開口６が上に位置し、頂部５が下に位置する向きで、キャップ基材２が第１型２１にセットされる。このとき、キャップ基材２の頂部５が、第１型２１の成型面２８の支持面３３に接触するように載置される。また、キャップ基材２は、その外周面がスリーブ２３の内周面と対向して配置されることによって径方向の位置決めがなされる。すなわち、キャップ基材２は、第１型２１及びスリーブ２３により構成される窪みに嵌め込まれるようにセットされる。 Subsequently, a manufacturing procedure of the lens cap 1 will be described with reference to FIG.
As shown in FIG. 9A, the second die 22 is slid upward to open the inside of the sleeve 23, and the cap base material 2 is set on the lens cap manufacturing apparatus 20. In the case of the present example, the cap base material 2 is set on the first mold 21 so as to face downward. That is, the cap base material 2 is set on the first mold 21 in a direction in which the opening 6 is located at the top and the top 5 is located at the bottom. At this time, the cap 5 is placed so that the top 5 of the cap substrate 2 contacts the support surface 33 of the molding surface 28 of the first mold 21. Further, the cap base material 2 is positioned in the radial direction by arranging the outer peripheral surface thereof to face the inner peripheral surface of the sleeve 23. That is, the cap base material 2 is set so as to be fitted into the recess formed by the first mold 21 and the sleeve 23.
　図９（ｂ）に示すように、第１型２１にセットされたキャップ基材２にレンズ母材４１をセットする。本例のレンズ母材４１は、例えば玉部材（球）である。本例の場合、キャップ基材２が下向きに配置されているので、レンズ母材４１の投入時、レンズ母材４１が孔８に位置決めされ易い。よって、レンズ母材４１のセットが容易である。 9) As shown in FIG. 9B, the lens base material 41 is set on the cap base material 2 set on the first mold 21. The lens base material 41 of the present example is, for example, a ball member (sphere). In the case of this example, since the cap base material 2 is arranged downward, the lens base material 41 is easily positioned in the hole 8 when the lens base material 41 is loaded. Therefore, setting of the lens base material 41 is easy.
　図９（ｃ）に示すように、第１型２１にキャップ基材２及びレンズ母材４１をセットした後、第２型２２を第１型２１に向けて下方（同図の矢印Ｒ３方向）にスライド移動させ、第２型２２の成型面３７をレンズ母材４１に接触させる。 As shown in FIG. 9C, after the cap base material 2 and the lens base material 41 are set on the first mold 21, the second mold 22 is moved downward toward the first mold 21 (in the direction of arrow R3 in FIG. 9). The molding surface 37 of the second mold 22 is brought into contact with the lens base material 41.
　図９（ｄ）に示すように、第２型２２をレンズ母材４１に接触させた後、レンズ母材４１を雰囲気加熱してプレス（熱プレス加工）する。なお、この熱プレス加工は、窒素雰囲気、大気雰囲気のどちらでもよい。本例の場合、第２型２２の成型面３７をキャップ基材２から離した状態でレンズ母材４１が熱加工される。そして、この熱加工によりレンズ母材４１が加熱軟化すると、レンズ母材４１が周囲の形状に合わせて変形し、必要とする所定のレンズ形状に加工される。そして、この熱加工の後、レンズ部３を冷却し、キャップ基材２及びレンズ部３が一体になったレンズキャップ１をレンズキャップ製造装置２０から取り出す。以上により、レンズキャップ１の製造が完了する。 As shown in FIG. 9D, after the second mold 22 is brought into contact with the lens base material 41, the lens base material 41 is heated in an atmosphere and pressed (hot press working). This hot pressing may be performed in either a nitrogen atmosphere or an air atmosphere. In the case of this example, the lens base material 41 is thermally processed in a state where the molding surface 37 of the second mold 22 is separated from the cap base material 2. Then, when the lens base material 41 is softened by heating due to this thermal processing, the lens base material 41 is deformed according to the surrounding shape, and is processed into a required predetermined lens shape. After this heat processing, the lens unit 3 is cooled, and the lens cap 1 in which the cap base material 2 and the lens unit 3 are integrated is taken out from the lens cap manufacturing apparatus 20. Thus, the manufacture of the lens cap 1 is completed.
　次に、図１０及び図１１を用いて、本実施形態のレンズキャップ１（レンズキャップ製造方法）の作用及び効果について説明する。
　図１０に、従来技術の位置付けのレンズキャップ製造方法を図示する。同図に例示する従来技術の場合、第１型２１の成型面２８は、凹部２９の大径穴３１の内壁面３０が斜面状（テーパ状）となった例を挙げている。この製造方法の場合、支持面３３の幅が十分に確保できないので、レンズ母材４１を熱プレス加工したとき、キャップ基材２の頂部５に過荷重がかかる。このため、同図の矢印Ｒａ方向に荷重がかかり、頂部５の孔８の周辺が不必要に変形してしまう可能性があった。こうなると、完成品のレンズキャップ１においてレンズ部３の位置が変動してしまい、焦点距離のばらつきに影響が生じる。 Next, an operation and an effect of the lens cap 1 (a method for manufacturing a lens cap) of the present embodiment will be described with reference to FIGS.
FIG. 10 illustrates a conventional method of manufacturing a positioned lens cap. In the case of the prior art illustrated in the figure, the molding surface 28 of the first mold 21 has an example in which the inner wall surface 30 of the large-diameter hole 31 of the concave portion 29 has a sloped (tapered) shape. In the case of this manufacturing method, since the width of the support surface 33 cannot be sufficiently ensured, an excessive load is applied to the top 5 of the cap base material 2 when the lens base material 41 is hot-pressed. For this reason, a load is applied in the direction of the arrow Ra in the same figure, and there is a possibility that the periphery of the hole 8 of the top 5 is unnecessarily deformed. In such a case, the position of the lens unit 3 in the finished lens cap 1 fluctuates, which affects the variation in the focal length.
　一方、図１１に示すように、本例の製造方法の場合、支持面３３の幅（本例は図５に示す「Ｄ」に相当）が十分に確保されている。このため、レンズ母材４１の熱プレス加工時に、レンズ母材４１からキャップ基材２の頂部５に荷重が加わっても、頂部５が広範囲の支持面３３によってしっかりと保持される。これにより、頂部５の孔８の周辺が不必要に変形しない。よって、レンズ部３の焦点距離を変動し難くし、焦点距離精度を向上することが可能となる。 On the other hand, as shown in FIG. 11, in the case of the manufacturing method of this example, the width of the support surface 33 (this example corresponds to “D” shown in FIG. 5) is sufficiently ensured. For this reason, even when a load is applied from the lens preform 41 to the top 5 of the cap base material 2 during the hot pressing of the lens preform 41, the top 5 is firmly held by the support surface 33 over a wide range. Thereby, the periphery of the hole 8 in the top 5 is not unnecessarily deformed. Therefore, the focal length of the lens unit 3 is hardly fluctuated, and the focal length accuracy can be improved.
　さて、本例の場合、キャップ基材２にレンズ部３を形成する場合、キャップ基材２の頂部５を、第１型２１の成型面２８の支持面３３によってしっかりと支持することが可能となる。このため、レンズ母材４１を加熱してレンズ部３に加工する場合に、レンズ母材４１からキャップ基材２の頂部５に荷重がかかっても、この荷重を成型面２８の支持面３３で支えることが可能となる。これにより、キャップ基材２の頂部５に反りが生じ難くなり、レンズ部３をキャップ基材２に精度よく設けることが可能となる。よって、キャップ基材２にレンズ部３を形成するにあたっての精度ばらつきを抑制することができる。ひいては、レンズ部３の焦点距離のばらつきも抑制することができる。 By the way, in the case of this example, when the lens portion 3 is formed on the cap substrate 2, the top 5 of the cap substrate 2 can be firmly supported by the support surface 33 of the molding surface 28 of the first mold 21. Become. For this reason, when the lens base material 41 is heated and processed into the lens portion 3, even if a load is applied from the lens base material 41 to the top 5 of the cap base material 2, the load is applied to the support surface 33 of the molding surface 28. It becomes possible to support. This makes it difficult for the top portion 5 of the cap base material 2 to be warped, and allows the lens portion 3 to be provided on the cap base material 2 with high accuracy. Therefore, it is possible to suppress variations in accuracy in forming the lens unit 3 on the cap base material 2. As a result, variations in the focal length of the lens unit 3 can also be suppressed.
　キャップ基材２は、頂部５の表面が固定型の第１型２１を向くとともに、頂部５の裏面が可動型の第２型２２を向くように配置される。この場合、キャップ基材２にレンズ部３を形成するに際し、可動型である第２型２２の作動量（第１型２１に対しての下方向への移動量）を調節するなどして、レンズ部３の内面側（第２レンズ曲面部１０）を精度よく加工することが可能となる。よって、レンズ部３の焦点距離の精度確保に有利となる。 The cap base material 2 is arranged such that the surface of the top 5 faces the fixed first mold 21 and the back surface of the top 5 faces the movable second mold 22. In this case, when the lens portion 3 is formed on the cap base material 2, the operation amount of the movable second die 22 (the amount of downward movement with respect to the first die 21) is adjusted. The inner surface side (the second lens curved surface portion 10) of the lens portion 3 can be accurately processed. Therefore, it is advantageous for ensuring the accuracy of the focal length of the lens unit 3.
　ところで、キャップ基材２は、頂部５の裏面が固定型の第１型２１を向くとともに、頂部５の表面が可動型の第２型２２を向くように配置されていてもよい。この場合であっても、レンズ母材４１からキャップ基材２の頂部５に荷重がかかった際の荷重を成型面２８の支持面３３で支えることが可能となる。これにより、キャップ基材２の頂部５に反りが生じ難くなり、レンズ部３をキャップ基材２に精度よく設けることが可能となる。よって、キャップ基材２にレンズ部３を形成するにあたっての精度ばらつきを抑制することが可能となる。 By the way, the cap base material 2 may be arranged so that the back surface of the top 5 faces the fixed first mold 21 and the surface of the top 5 faces the movable second mold 22. Even in this case, it is possible to support the load when the load is applied from the lens base material 41 to the top 5 of the cap base material 2 by the support surface 33 of the molding surface 28. This makes it difficult for the top portion 5 of the cap base material 2 to be warped, and allows the lens portion 3 to be provided on the cap base material 2 with high accuracy. Therefore, it is possible to suppress variations in accuracy in forming the lens unit 3 on the cap base material 2.
　また、キャップ基材２の内部にレンズ母材４１を投入してレンズ母材４１を孔８に位置合わせする作業が簡単に実施可能になる。よって、レンズ母材４１のセットを容易に行うことができる。 (4) The operation of putting the lens base material 41 into the cap base material 2 and aligning the lens base material 41 with the hole 8 can be easily performed. Therefore, the setting of the lens base material 41 can be easily performed.
　第１型２１は、下型であり、第２型２２は、上型である。よって、キャップ基材２を第１型２１に置くようにしてセットすることが可能となるので、キャップ基材２を簡単に第１型２１にセットすることができるようになる。 The first mold 21 is a lower mold, and the second mold 22 is an upper mold. Therefore, it is possible to set the cap base material 2 so as to be placed on the first mold 21, so that the cap base material 2 can be easily set on the first mold 21.
　凹部２９は、内壁面３０が鉛直方向に沿うように形成された大径穴３１と、大径穴３１よりも奥に位置しつつ小径に形成された小径穴３２とが連続して成る段付き穴である。よって、この凹部２９の大径穴３１によって、レンズ部３におけるキャップ基材２との係止箇所（第１係止部１１）を形成することができる。また、凹部２９の小径穴３２によって、レンズ部３における所望の形状の光透過箇所（第１レンズ曲面部９）を形成することができる。 The recess 29 has a stepped portion in which a large-diameter hole 31 formed so that the inner wall surface 30 extends along the vertical direction and a small-diameter hole 32 formed at a smaller diameter while being located deeper than the large-diameter hole 31. It is a hole. Therefore, the large-diameter hole 31 of the concave portion 29 can form a locking portion (the first locking portion 11) of the lens portion 3 with the cap base material 2. Further, a light transmitting portion (first lens curved surface portion 9) having a desired shape in the lens portion 3 can be formed by the small diameter hole 32 of the concave portion 29.
　なお、本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
　・レンズ母材４１の加熱源は、ストッパ２４の外周を覆うよう配置されていてもよいし、それ以外の箇所に配置されてもよい。 This embodiment can be implemented with the following modifications. The present embodiment and the following modifications can be implemented in combination with each other within a technically consistent range.
-The heating source of the lens base material 41 may be arranged so as to cover the outer periphery of the stopper 24, or may be arranged at other places.
　・レンズ母材４１の熱プレス加工は、雰囲気加熱してプレスする工法に限定されず、例えばレーザを用いた工法（レーザ軟化）としてもよい。
　・第２係止部１２は、キャップ基材２の頂部５の裏面全域に形成された形状としてもよい。 The hot pressing of the lens base material 41 is not limited to the method of pressing by heating in an atmosphere, but may be, for example, a method of using a laser (laser softening).
The second locking portion 12 may have a shape formed on the entire back surface of the top portion 5 of the cap base material 2.
　・第１型２１の支持面３３、及び凹部２９は、レンズ部３の製造時にキャップ基材２の頂部５をしっかりと支持できる形状をとっていればよい。
　・凹部２９の形状は、本例のような大径穴３１及び小径穴３２を有する段状（ザグリ形状）に限定されず、レンズ部３の成型時にキャップ基材２の頂部５を支持しつつ、必要なレンズ部３の形状を形成できる形状であればよい。 The support surface 33 and the concave portion 29 of the first mold 21 only need to have a shape capable of firmly supporting the top 5 of the cap base material 2 when the lens portion 3 is manufactured.
The shape of the concave portion 29 is not limited to the stepped shape (counterbore shape) having the large-diameter hole 31 and the small-diameter hole 32 as in this example, and the top portion 5 of the cap base material 2 is supported while the lens portion 3 is molded. Any shape can be used as long as the shape of the necessary lens portion 3 can be formed.
　・キャップ基材２の材質は、実施例以外の種類に適宜変更してもよい。例えば、ＳＵＳ４３０、ＳＵＳ４３０Ｆ、ＳＦ－２０Ｆ、ＳＦ－２０Ｔ等を挙げることができる。なお、キャップ基材２の材質は、ＳＵＳ材料以外の金属材料からなっていてもよく、ニッケルと鉄の合金などからなっていてもよい。 · The material of the cap base material 2 may be appropriately changed to a type other than the embodiment. For example, SUS430, SUS430F, SF-20F, SF-20T and the like can be mentioned. The material of the cap substrate 2 may be made of a metal material other than the SUS material, or may be made of an alloy of nickel and iron.
　・スリーブ２３は、スリーブ２３の本体部分と突部３８とが別部材となった分割構造としてもよい。
　・レンズキャップ製造装置２０は、第１型２１、第２型２２、スリーブ２３及びストッパ２４を有する構造に限定されず、他の構造も適用可である。 The sleeve 23 may have a divided structure in which the main body portion of the sleeve 23 and the projection 38 are separate members.
-The lens cap manufacturing apparatus 20 is not limited to the structure having the first mold 21, the second mold 22, the sleeve 23, and the stopper 24, and other structures are applicable.
　・スリーブ２３やストッパ２４は、実施例以外の形状や構造のものに適宜変更できる。また、レンズキャップ製造装置２０は、スリーブ２３やストッパ２４を必ずしも備える必要はなく、同様の機能の部材を有した装置であればよい。 The sleeve 23 and the stopper 24 can be appropriately changed to those having shapes and structures other than those of the embodiment. The lens cap manufacturing apparatus 20 does not necessarily need to include the sleeve 23 and the stopper 24, and may be any apparatus having a member having the same function.
　・第１型２１及び第２型２２は、下型と上型とを入れ替えてもよい。また、第１型２１及び第２型２２は、固定型と可動型とを入れ替えてもよい。
　・第１型２１及び第２型２２は、両方とも可動型としてもよい。 -The 1st type | mold 21 and the 2nd type | mold 22 may replace a lower type | mold and an upper type | mold. Further, the first mold 21 and the second mold 22 may be replaced with a fixed mold and a movable mold.
-Both the first mold 21 and the second mold 22 may be movable.
　・支持面３３が支持する頂部５の領域、すなわち孔８周囲を除いた部位全域は、加工時にキャップ基材２に反りが生じないために必要な面積を有していればよい。
　・レンズキャップ製造装置２０は、キャップ基材２の表側を第２型２２に向かせ、キャップ基材２の裏側を第１型２１に向かせてセットする態様により、レンズキャップ１を製造するものでもよい。 The region of the top portion 5 supported by the support surface 33, that is, the entire region excluding the periphery of the hole 8 only needs to have an area necessary for preventing warpage of the cap base material 2 during processing.
The lens cap manufacturing apparatus 20 manufactures the lens cap 1 by setting the front side of the cap base 2 toward the second mold 22 and the back side of the cap base 2 toward the first mold 21. May be.
　・レンズキャップ製造装置２０は、実施例以外の態様に適宜変更可能である。 The lens cap manufacturing apparatus 20 can be appropriately changed to an embodiment other than the embodiment.
　１…レンズキャップ、２…キャップ基材、３…レンズ部、５…頂部、８…孔、１１…第１係止部、１２…第２係止部、２０…レンズキャップ製造装置、２１…第１型、２２…第２型、２８…成型面、２９…凹部、３１…大径穴、３２…小径穴、３３…支持面、３７…成型面、４１…レンズ母材。 DESCRIPTION OF SYMBOLS 1 ... Lens cap, 2 ... Cap base material, 3 ... Lens part, 5 ... Top part, 8 ... Hole, 11 ... First locking part, 12 ... Second locking part, 20 ... Lens cap manufacturing apparatus, 21 ... No. 1 type, 22 ... second type, 28 ... molding surface, 29 ... concave portion, 31 ... large diameter hole, 32 ... small diameter hole, 33 ... support surface, 37 ... molding surface, 41 ... lens base material.

Claims (6)

  1. 　互いに接近及び離隔するように作動する第１型及び第２型との間に、筒部と当該筒部の片側端に設けられた頂部とを有する形状のキャップ基材を配置し、当該キャップ基材の前記頂部の孔に配置されたレンズ母材を熱プレス加工して、前記第１型及び前記第２型の成型面に沿った形状に前記レンズ母材を変形させることで、前記孔を覆うようにレンズ部を形成するレンズキャップ製造方法であって、
    　前記第１型の成型面に、前記レンズ部の型枠となる段状の凹部と、前記レンズ母材の加工時に前記頂部を支持する支持面とを設け、前記頂部において孔周囲を除いた部位全域を前記支持面で支持しつつ、前記第２型の成型面を前記キャップ基材から離した状態で前記レンズ母材を熱プレス加工することにより、前記キャップ基材に前記レンズ部を形成するレンズキャップ製造方法。     A cap base having a shape having a tubular portion and a top provided at one end of the tubular portion is disposed between a first mold and a second mold that operate so as to approach and separate from each other. The lens base material placed in the hole at the top of the material is hot pressed to deform the lens base material into a shape along the molding surface of the first mold and the second mold, thereby forming the hole. A lens cap manufacturing method of forming a lens portion to cover,
    On the molding surface of the first mold, a stepped concave portion serving as a mold of the lens portion, and a support surface for supporting the top portion when processing the lens base material are provided, and a portion of the top portion excluding a hole periphery is provided. The lens portion is formed on the cap base by hot pressing the lens base material with the molding surface of the second mold separated from the cap base while supporting the entire area with the support surface. Lens cap manufacturing method.
  2. 　前記キャップ基材は、前記頂部の表面が固定型の前記第１型を向き、前記頂部の裏面が可動型の前記第２型を向くように配置される
    請求項１に記載のレンズキャップ製造方法。     The lens cap manufacturing method according to claim 1, wherein the cap base material is arranged such that a top surface faces the fixed first mold and a top rear surface faces the movable second mold. .
  3. 　前記第１型は、下型であり、前記第２型は、上型である
    請求項２に記載のレンズキャップ製造方法。     The method according to claim 2, wherein the first mold is a lower mold, and the second mold is an upper mold.
  4. 　前記凹部は、内壁面が鉛直方向に沿うように形成された大径穴と、当該大径穴よりも奥に位置しつつ小径に形成された小径穴とが連続してなる段付き穴である
    請求項１～３のうちいずれか一項に記載のレンズキャップ製造方法。     The concave portion is a stepped hole in which a large-diameter hole whose inner wall surface is formed along the vertical direction and a small-diameter hole formed at a smaller diameter while being located deeper than the large-diameter hole are continuous. The method for manufacturing a lens cap according to any one of claims 1 to 3.
  5. 　互いに接近及び離隔するように作動する第１型及び第２型との間に、筒部と当該筒部の片側端に設けられた頂部とを有する形状のキャップ基材を配置し、当該キャップ基材の頂部の孔に配置されたレンズ母材を熱プレス加工して、前記第１型及び前記第２型の成型面に沿った形状に前記レンズ母材を変形させることで、前記孔を覆うようにレンズ部を形成するレンズキャップ製造装置であって、
    　前記第１型の成型面には、前記レンズ部の型枠となる段状の凹部と、前記レンズ母材の加工時に前記頂部を支持する支持面とが設けられ、
    　前記キャップ基材に前記レンズ部を形成する場合には、前記頂部において孔周囲を除いた部位全域を前記支持面で支持しつつ、前記第２型の成型面を前記キャップ基材から離した状態で前記レンズ母材を熱プレス加工することにより、前記レンズ部の形成を行うレンズキャップ製造装置。     A cap base having a shape having a tubular portion and a top provided at one end of the tubular portion is disposed between a first mold and a second mold that operate so as to approach and separate from each other. The lens base material placed in the hole at the top of the material is hot pressed to deform the lens base material into a shape along the molding surface of the first mold and the second mold, thereby covering the hole. A lens cap manufacturing apparatus for forming a lens portion as follows,
    The molding surface of the first mold is provided with a stepped concave portion serving as a mold of the lens portion, and a support surface for supporting the top portion when processing the lens base material,
    When the lens portion is formed on the cap substrate, a state where the molding surface of the second mold is separated from the cap substrate while supporting the entire region except for the periphery of the hole at the top portion with the support surface. A lens cap manufacturing apparatus for forming the lens portion by hot pressing the lens base material.
  6. 　片側無底筒状に形成されたキャップ基材と、当該キャップ基材の頂部の孔に組み付けられたレンズ部とを備えたレンズキャップであって、
    　前記レンズ部には、前記頂部の表面に係止する第１係止部と、前記頂部の裏面に係止する第２係止部とが形成され、
    　前記第１係止部及び前記第２係止部の間に係止された前記頂部の厚さをｄ、前記第１係止部の高さをｈ、前記第１係止部の幅をｗとした場合、ｄが０．０８～０．３０ｍｍの値に設定され、ｈが０．０８～０．４０ｍｍの値に設定され、ｗが０．０３～０．５０の値に設定されているレンズキャップ。     A cap having a cap base formed into a single-sided bottomless cylindrical shape, and a lens cap having a lens unit attached to a hole at the top of the cap base,
    A first locking portion that locks on the surface of the top portion and a second locking portion that locks on the back surface of the top portion,
    The thickness of the top portion locked between the first locking portion and the second locking portion is d, the height of the first locking portion is h, and the width of the first locking portion is w. , D is set to a value of 0.08 to 0.30 mm, h is set to a value of 0.08 to 0.40 mm, and w is set to a value of 0.03 to 0.50. Lens cap.
PCT/JP2019/024022 2018-06-26 2019-06-18 Lens cap production method, lens cap production device, and lens cap WO2020004129A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063743A (en) * 1983-09-16 1985-04-12 Olympus Optical Co Ltd Optical element with multifunctional carrier
JP2006208928A (en) * 2005-01-31 2006-08-10 Seiko Precision Inc Plastic lens, lens unit, and assembling method of lens unit
JP2006285109A (en) * 2005-04-04 2006-10-19 Olympus Corp Composite optical element and manufacturing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063743A (en) * 1983-09-16 1985-04-12 Olympus Optical Co Ltd Optical element with multifunctional carrier
JP2006208928A (en) * 2005-01-31 2006-08-10 Seiko Precision Inc Plastic lens, lens unit, and assembling method of lens unit
JP2006285109A (en) * 2005-04-04 2006-10-19 Olympus Corp Composite optical element and manufacturing method thereof

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