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JP2008256938A - Optical component and method for manufacturing optical component - Google Patents

Optical component and method for manufacturing optical component Download PDF

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Publication number
JP2008256938A
JP2008256938A JP2007098782A JP2007098782A JP2008256938A JP 2008256938 A JP2008256938 A JP 2008256938A JP 2007098782 A JP2007098782 A JP 2007098782A JP 2007098782 A JP2007098782 A JP 2007098782A JP 2008256938 A JP2008256938 A JP 2008256938A
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Japan
Prior art keywords
plate
optical component
frame
optical
frame body
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JP2007098782A
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Japanese (ja)
Inventor
Norimitsu Nagayama
典光 永山
Hiroyuki Seki
博之 関
Akira Kawamura
明 川村
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Olympus Corp
Olympus Imaging Corp
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Olympus Corp
Olympus Imaging Corp
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Priority to JP2007098782A priority Critical patent/JP2008256938A/en
Publication of JP2008256938A publication Critical patent/JP2008256938A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical component having a thin frame body by means formed by integrating at least two plate materials, the frame body being filled with plastic material, and to provide a method for manufacturing the optical component. <P>SOLUTION: The optical component 44 is obtained by integrally bringing an optical device 29 comprising a convex meniscus lens into contact with the frame body 30 and bonding them. The frame body 30 has an aperture part in the center, and thickness in the optical axis direction of the periphery of the aperture part is larger than thickness in the optical axis direction on the outer periphery side of the frame body. The frame body 30 is obtained by integrating a batten with a throttle plate having a different linear expansion coefficient. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、光学機器に用いられる枠一体の光学素子を有する光学部品及び光学部品の製造方法に関する。   The present invention relates to an optical component having a frame-integrated optical element used in an optical apparatus and a method for manufacturing the optical component.

近年における光学レンズは、製造コスト抑制の観点から光学素子素材と枠体とが成形手段により一発成形され、その後、芯出し工程を経て鏡枠に装着される。このような光学レンズとして、例えば、特許文献1には、図13に示すように、レンズ本体101の2つの光学面101a,101bの間に、絞り板102の内周面102aがレンズ本体101の内部に位置するような撮像レンズが開示されている。この場合、成形時には、金型に予め絞り板102を組み込んでおき、この状態で、金型に光学素子素材を注入してレンズ本体101と絞り板102とを一体成形している。   In recent optical lenses, the optical element material and the frame body are molded once by molding means from the viewpoint of manufacturing cost reduction, and then mounted on the lens frame through a centering process. As such an optical lens, for example, in Patent Document 1, as shown in FIG. 13, the inner peripheral surface 102 a of the diaphragm plate 102 is between the two optical surfaces 101 a and 101 b of the lens body 101. An imaging lens that is located inside is disclosed. In this case, at the time of molding, the diaphragm plate 102 is incorporated in advance in the mold, and in this state, the optical element material is injected into the mold to integrally mold the lens body 101 and the diaphragm plate 102.

また、特許文献2では、図14に示すように、成形型間にゴブ状のガラス素材105を配置し、また、ガラスよりも線膨張係数の小さい部材からなる鏡枠106を成形型内に配置する。そして、ガラス素材105を押圧して成形する際、ガラスゴブの余剰ガラスが鏡枠106の挟持部106aに流入して収容される。
特開2001−350075号公報 特開平5−294646号公報
Further, in Patent Document 2, as shown in FIG. 14, a gob-shaped glass material 105 is disposed between molds, and a lens frame 106 made of a member having a smaller linear expansion coefficient than glass is disposed in the mold. To do. Then, when the glass material 105 is pressed and molded, the surplus glass of the glass gob flows into the holding portion 106 a of the lens frame 106 and is accommodated.
JP 2001-350075 A JP-A-5-294646

しかしながら、特許文献1では、絞り板102の内周面102aが、レンズ本体101内に位置しているため、接合境界面でレンズが割れやすく、搭載される光学機器の機能を損ねるという課題があった。この点は、レンズが薄くなればなるほど顕著となる。   However, in Patent Document 1, since the inner peripheral surface 102a of the diaphragm plate 102 is located in the lens body 101, there is a problem that the lens is easily broken at the joint boundary surface and the function of the optical device to be mounted is impaired. It was. This point becomes more prominent as the lens becomes thinner.

また、特許文献2では、鏡枠106を製造する場合、その挟持部106aを形成するには、旋盤等で断面略コ字状の部分を旋削する必要がある。このため、鏡枠106を製造するための加工工数が増大し、製造コストがアップする。   Moreover, in patent document 2, when manufacturing the lens frame 106, in order to form the clamping part 106a, it is necessary to turn the substantially U-shaped cross-section part with a lathe. For this reason, the processing man-hour for manufacturing the lens frame 106 increases, and manufacturing cost rises.

本発明は斯かる課題を解決するためになされたもので、少なくとも2枚の板材を一体化して薄い枠体を形成し、この枠体に可塑性素材を充填して得られた光学部品及び光学部品の製造方法を提供することを目的とする。   The present invention has been made to solve such a problem, and at least two plate members are integrated to form a thin frame, and an optical component and an optical component obtained by filling the frame with a plastic material It aims at providing the manufacturing method of.

前記目的を達成するため、請求項1に係る発明は、
光学素子と枠体とを一体的に密着接合してなる光学部品において、
前記枠体は、少なくとも2枚の板材を一体化して構成されることを特徴とする。
In order to achieve the object, the invention according to claim 1
In the optical component formed by tightly bonding the optical element and the frame integrally,
The frame body is formed by integrating at least two plate members.

請求項2に係る発明は、請求項1に記載の光学部品において、
前記枠体は中央に開口部を有し、該開口部の周縁の光軸方向の厚さをaとし、前記枠体の外周側の光軸方向の厚さをbとしたとき、
a>bの関係を有することを特徴とする。
The invention according to claim 2 is the optical component according to claim 1,
The frame has an opening in the center, the thickness in the optical axis direction of the periphery of the opening is a, and the thickness in the optical axis direction on the outer peripheral side of the frame is b,
The relationship is a> b.

請求項3に係る発明は、請求項1又は2に記載の光学部品において、
前記開口部の周縁には、前記光学素子の外周部を挟み込む溝が形成されていることを特徴とする。
The invention according to claim 3 is the optical component according to claim 1 or 2,
A groove for sandwiching the outer periphery of the optical element is formed at the periphery of the opening.

請求項4に係る発明は、請求項1〜3のいずれかに記載の光学部品において、
前記少なくとも2枚の板材は、異なる線膨張係数を有することを特徴とする。
請求項5に係る発明は、
対向する一対の成形型間に配置された可塑性素材と、その周囲に配置した枠体とを一体的に密着接合して光学部品を製造する光学部品の製造方法において、
前記枠体は夫々開口部を有する少なくとも2枚の板材を有し、該少なくとも2枚の板材を前記可塑性素材を押圧する工程で一体化し、形成された前記開口部の周縁の溝に前記可塑性素材を押圧しながら充填することを特徴とする。
The invention according to claim 4 is the optical component according to any one of claims 1 to 3,
The at least two plates have different linear expansion coefficients.
The invention according to claim 5
In the method of manufacturing an optical component in which an optical component is manufactured by integrally tightly bonding a plastic material disposed between a pair of opposed molds and a frame disposed around the plastic material,
The frame body has at least two plate members each having an opening, and the plastic material is integrated into a groove at a periphery of the opening formed by integrating the at least two plates in a step of pressing the plastic material. It is characterized by filling while pressing.

本発明によれば、光学素子と枠体とを一体的に密着接合した薄くて強い光学部品を得ることができる。   According to the present invention, it is possible to obtain a thin and strong optical component in which an optical element and a frame are integrally tightly bonded.

以下、図面に基づき本発明の実施の形態を説明する。
(光学部品の製造装置の構成)
図1は、本実施形態の光学部品の製造装置10の概略構成を示す図であり、図2は、金型組立体20による成形状態を示す図である。なお、図1及び図2では、スリーブ26にのみハッチングを施し、他の部材のハッチングは省略して図示する。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Configuration of optical component manufacturing equipment)
FIG. 1 is a diagram showing a schematic configuration of an optical component manufacturing apparatus 10 of the present embodiment, and FIG. 2 is a diagram showing a molding state by a mold assembly 20. In FIGS. 1 and 2, only the sleeve 26 is hatched, and other members are not illustrated.

光学部品の製造装置10は、上下に対向配置された下側プレート12及び上側プレート14と、上側プレート14を下側プレート12に向けて押圧する不図示の加圧装置を有している。下側プレート12は、下側カートリッジヒータ16上に載置されている。上側プレート14上には上側カートリッジヒータ18が載置されている。また、下側プレート12と上側プレート14との間には、金型組立体20が配置されている。   The optical component manufacturing apparatus 10 includes a lower plate 12 and an upper plate 14 that are opposed to each other in the vertical direction, and a pressing device (not shown) that presses the upper plate 14 toward the lower plate 12. The lower plate 12 is placed on the lower cartridge heater 16. An upper cartridge heater 18 is placed on the upper plate 14. A mold assembly 20 is disposed between the lower plate 12 and the upper plate 14.

金型組立体20は、下側プレート12と上側プレート14に挟まれた状態で、不図示の加圧装置により加圧される。また、金型組立体20は、下側カートリッジヒータ16と上側カートリッジヒータ18により上下両側から加熱される。本実施形態では、ヒータとしてカートリッジヒータ16,18を採用したが、例えばカートリッジヒータ16,18に代えて、他のヒータにより金型組立体20を側面から加熱してもよい。   The mold assembly 20 is pressed by a pressing device (not shown) while being sandwiched between the lower plate 12 and the upper plate 14. The mold assembly 20 is heated from both the upper and lower sides by the lower cartridge heater 16 and the upper cartridge heater 18. In the present embodiment, the cartridge heaters 16 and 18 are employed as the heaters. However, for example, instead of the cartridge heaters 16 and 18, the mold assembly 20 may be heated from the side by another heater.

金型組立体20は、対向配置された下型22及び上型24と、これらを嵌挿する円筒状のスリーブ26で構成されている。下型22及び上型24は、スリーブ26の両端側から、夫々の凹状の成形面22aと凸状の成型面24aとが対向するように嵌挿されている。上型24はスリーブ26の軸方向に摺動自在とされている。上型24と下型22は、スリーブ26に嵌挿された状態で、スリーブ26の内径中心軸に対して、上型24の中心軸C及び下型22の中心軸C‘が一致するように加工されている。   The mold assembly 20 includes a lower mold 22 and an upper mold 24 that are arranged to face each other, and a cylindrical sleeve 26 into which these are fitted. The lower mold 22 and the upper mold 24 are fitted and inserted from both ends of the sleeve 26 so that the concave molding surface 22a and the convex molding surface 24a face each other. The upper die 24 is slidable in the axial direction of the sleeve 26. The upper mold 24 and the lower mold 22 are fitted in the sleeve 26 so that the central axis C of the upper mold 24 and the central axis C ′ of the lower mold 22 coincide with the inner diameter central axis of the sleeve 26. Has been processed.

なお、上型24、下型22、及びスリーブ26の材料としては、例えば炭化タングステン(WC)などの合金が使用される。また、スリーブ26の側面に形成された孔27は空気抜きである。   As the material of the upper mold 24, the lower mold 22, and the sleeve 26, for example, an alloy such as tungsten carbide (WC) is used. Moreover, the hole 27 formed in the side surface of the sleeve 26 is an air vent.

下型22の成形面22aと上型24の成形面24aとの間には、球状の可塑性素材(ガラス素材)28と、その周囲を囲むように金属製の枠体30が配置されている。下型22には、成形面22aの周囲に枠体30を載せるための載置面23が形成されている。   Between the molding surface 22a of the lower mold 22 and the molding surface 24a of the upper mold 24, a spherical plastic material (glass material) 28 and a metal frame 30 are arranged so as to surround the periphery. The lower mold 22 has a mounting surface 23 on which the frame body 30 is placed around the molding surface 22a.

図2に示すように、成形時には、下型22に対し上型24が接近移動して、加熱軟化された可塑性素材28と枠体30とを一体的に密着接合する。こうして、光学部品44(図9参照)が製造される。このとき、スリーブ26には、空気抜きの孔27が形成されているので、上型24の移動の際、キャビティ内の空気は孔27を通って外に逃げる。このため、上型24はスムーズに移動することができる。
(第1の実施の形態)
図3は、枠体30の分解斜視図であり、図4は、抜き板32と絞り板34とを重ね合わせた状態を示す図である。
As shown in FIG. 2, at the time of molding, the upper mold 24 moves closer to the lower mold 22, and the heat-softened plastic material 28 and the frame 30 are integrally tightly joined. Thus, the optical component 44 (see FIG. 9) is manufactured. At this time, since the air vent hole 27 is formed in the sleeve 26, the air in the cavity escapes through the hole 27 when the upper mold 24 is moved. For this reason, the upper mold | type 24 can move smoothly.
(First embodiment)
FIG. 3 is an exploded perspective view of the frame body 30, and FIG. 4 is a view showing a state in which the punching plate 32 and the diaphragm plate 34 are overlapped.

図3に示すように、枠体30は、少なくとも2枚の板材、本実施形態では、抜き板32と絞り板34との2枚の板材が重ね合わされて一体化される。抜き板32と絞り板34の材質は、ともにステンレス鋼を用いている。ただし、ステンレス鋼には限らず、他の金属材料を用いてもよい。また、抜き板32と絞り板34の材質は、異なってもよいが、線膨張係数が近似したものが好ましい。   As shown in FIG. 3, the frame 30 is integrated by superimposing at least two plate materials, in this embodiment, two plate materials of a blank plate 32 and a diaphragm plate 34. Stainless steel is used as the material of the extraction plate 32 and the diaphragm plate 34. However, it is not limited to stainless steel, and other metal materials may be used. Further, the material of the blank plate 32 and the diaphragm plate 34 may be different, but those having approximate linear expansion coefficients are preferable.

抜き板32は、ドーナツ状の円板部39の中央に開口部38を有している。円板部39には、円周に沿って略等間隔で多数の孔33が形成されている。また、絞り板34は、ドーナツ状の円板部41の中央に開口部42を有している。この開口部42の周縁には、絞り部35が形成されている。抜き板32と絞り板34とは、その開口部38と開口部42の直径が同一で、かつ全体の外径も同一の寸法を有している。   The punching plate 32 has an opening 38 in the center of a donut-shaped disc portion 39. A large number of holes 33 are formed in the disc portion 39 at substantially equal intervals along the circumference. The diaphragm plate 34 has an opening 42 at the center of a donut-shaped disk portion 41. An aperture portion 35 is formed on the periphery of the opening 42. The extraction plate 32 and the diaphragm plate 34 have the same opening 38 and the same opening 42, and the same outer diameter.

図4に示すように、絞り板34の絞り部35は、円板部41の内周側において、略垂直に立ち上がる立ち上げ部36と、該立ち上げ部36の先端側から内側に略直角に折曲された折曲部37と、を有している。枠体30を形成するには、まず、抜き板32と絞り板34とを、それぞれの外径側を基準として重ね合わせる。次に、後述するように、金属パンチにより抜き板32と絞り板34とを一体化する。   As shown in FIG. 4, the diaphragm portion 35 of the diaphragm plate 34 includes a rising portion 36 that rises substantially vertically on the inner peripheral side of the disc portion 41, and a substantially right angle inward from the tip side of the rising portion 36. And a bent portion 37 that is bent. In order to form the frame 30, first, the punching plate 32 and the diaphragm plate 34 are overlapped on the basis of the respective outer diameter sides. Next, as will be described later, the punching plate 32 and the diaphragm plate 34 are integrated by a metal punch.

なお、順送プレスで一体化する場合は、フープの一部にあけられた穴を基準として使用する。また、本実施形態では、抜き板32及び絞り板34として、円周状に連続的に連なったものとして説明したが、これに限らず、例えば円周の一部にスリットが形成されたものであってもよい。   In addition, when integrating with a progressive press, the hole opened in a part of hoop is used as a reference | standard. In the present embodiment, the punching plate 32 and the diaphragm plate 34 have been described as being continuously connected in a circumferential shape. However, the present invention is not limited to this. For example, a slit is formed in a part of the circumference. There may be.

図5及び図6は、抜き板32と絞り板34との一体化の工程を示している。
図5に示すように、抜き板32と絞り板34とを重ね合わせた状態で、絞り板34をパンチ40により半切加工を行う。ここで、半切加工とは、板厚の略半分を押し出すような加工方法をいう。この半切加工では、不図示の基台の上に抜き板32と絞り板34とを外径を基準に重ね合わせて載置する。次に、抜き板32の孔33と対応する位置の絞り板34に対し、パンチ40を矢印方向に突出させる。
5 and 6 show a process of integrating the punching plate 32 and the diaphragm plate 34.
As shown in FIG. 5, the diaphragm plate 34 is half-cut with a punch 40 in a state where the punching plate 32 and the diaphragm plate 34 are overlapped. Here, half-cutting refers to a processing method that extrudes approximately half of the plate thickness. In this half-cutting process, a blanking plate 32 and a diaphragm plate 34 are placed on a base (not shown) so as to overlap with each other on the basis of the outer diameter. Next, the punch 40 is protruded in the arrow direction with respect to the diaphragm plate 34 at a position corresponding to the hole 33 of the punching plate 32.

このため、図6に示すように、絞り板34の板厚の半分が抜き板32の孔33に押し込まれる。こうして、抜き板32と絞り板34とが一体化され、枠体30が形成される。この枠体30には、開口部38、42の周縁に断面略コ字状の溝31が形成される。成形時には、この溝31に、光学素子の外周部が上下面から挟み込まれる。   For this reason, as shown in FIG. 6, half of the plate thickness of the diaphragm plate 34 is pushed into the hole 33 of the punch plate 32. In this way, the blank plate 32 and the diaphragm plate 34 are integrated, and the frame 30 is formed. In the frame 30, a groove 31 having a substantially U-shaped cross section is formed at the periphery of the openings 38 and 42. At the time of molding, the outer peripheral portion of the optical element is sandwiched in the groove 31 from the upper and lower surfaces.

本実施形態では、この溝31の光軸方向の厚さをaとし、枠体30の外周側の光軸方向の厚さをbとしたとき、
a>bの関係を有している。
In the present embodiment, when the thickness of the groove 31 in the optical axis direction is a and the thickness of the outer peripheral side of the frame 30 is b,
The relationship is a> b.

すなわち、枠体30は、光学素子の外周部を挟み込む部分のみが厚く、その他の部分の厚さは薄い形状を有している。
図7は、枠体30の完成品の外観を示す図である。
That is, the frame 30 has a shape in which only the portion sandwiching the outer peripheral portion of the optical element is thick, and the thickness of the other portions is thin.
FIG. 7 is a view showing the appearance of a finished product of the frame 30.

前述したように、枠体30は、抜き板32の孔33の位置で、該孔33の中に絞り板34が厚さの半分を押し込まれて一体化されている。
なお、本実施形態では、抜き板32と絞り板34とを、金属プレスにより一体化して枠体30を形成した場合について説明した。しかし、これに限らず、抜き板32と絞り板34とを、例えばカシメ、レーザ溶接、又はスポット溶接により一体化してもよい。また、抜き板32と絞り板34とを接着剤を用いて一体化してもよい。
As described above, the frame body 30 is integrated at the position of the hole 33 of the punching plate 32 by pushing the half-thickness of the diaphragm plate 34 into the hole 33.
In the present embodiment, the case where the blank plate 32 and the diaphragm plate 34 are integrated by a metal press to form the frame 30 has been described. However, the present invention is not limited to this, and the punching plate 32 and the diaphragm plate 34 may be integrated by, for example, caulking, laser welding, or spot welding. Further, the punching plate 32 and the diaphragm plate 34 may be integrated using an adhesive.

さらに、本実施形態では、枠体30に断面略コ字状の溝31を形成した場合について説明したが、これに限らず、例えば楕円状や円形状等の溝であってもよい。また、枠体30を、抜き板32と絞り板34の2枚の板材で構成した場合について説明したが、2枚の板材に限らず、3枚以上の板材を用いて構成してもよい。   Furthermore, although the case where the groove 31 having a substantially U-shaped cross section was formed in the frame 30 has been described in the present embodiment, the present invention is not limited thereto, and may be an elliptical or circular groove, for example. Moreover, although the case where the frame 30 was comprised with two board | plate materials, the extraction board 32 and the aperture_diaphragm | restriction board 34, it was not restricted to two board | plate materials, You may comprise using three or more board | plate materials.

図8は、枠体30と光学素子29とを一体成形するときの状態を示す図である。
成形に際しては、下型22の成形面22aに可塑性素材28を配置する。次に、下型22の成形面22aの周りに形成した載置面23に枠体30を配置する。次いで、下側カートリッジヒータ16及び上側カートリッジヒータ18に通電して、可塑性素材28を加熱軟化させる。可塑性素材28が加熱軟化したら、下型22に対し上型24を接近移動させる。
FIG. 8 is a view showing a state when the frame body 30 and the optical element 29 are integrally formed.
At the time of molding, the plastic material 28 is disposed on the molding surface 22 a of the lower mold 22. Next, the frame body 30 is arranged on the mounting surface 23 formed around the molding surface 22 a of the lower mold 22. Next, the lower cartridge heater 16 and the upper cartridge heater 18 are energized to heat and soften the plastic material 28. When the plastic material 28 is heated and softened, the upper mold 24 is moved closer to the lower mold 22.

そして、下型22の成形面22aと上型24の成形面24aの中心間の距離が所定値になったところで、上型24の移動を停止させる。このとき、軟化した可塑性素材28が周囲に流れるように広がって、枠体30の断面略コ字状の溝31に入り込む。こうして、光学素子29と枠体30とが一体的に密着接合される。   Then, when the distance between the center of the molding surface 22a of the lower mold 22 and the molding surface 24a of the upper mold 24 reaches a predetermined value, the movement of the upper mold 24 is stopped. At this time, the softened plastic material 28 spreads to flow around and enters the groove 31 having a substantially U-shaped cross section of the frame 30. In this way, the optical element 29 and the frame body 30 are tightly bonded together.

図9は、光学素子29と枠体30とを一体的に密着接合した光学部品44を示す。
本実施形態では、光学素子29として凸メニスカスレンズを成形し、その外周部を枠体30の断面略コ字状の溝31で挟み込んでいる。
FIG. 9 shows an optical component 44 in which the optical element 29 and the frame 30 are integrally tightly bonded.
In the present embodiment, a convex meniscus lens is molded as the optical element 29, and the outer peripheral portion thereof is sandwiched between grooves 31 having a substantially U-shaped cross section of the frame body 30.

本実施形態によれば、光学素子29と枠体30とが一体化された薄くて強い光学部品44を得ることができる。すなわち、2枚の抜き板32と絞り板34とを金属プレスにより一体化して枠体30を形成したので、枠体30の内側の光軸方向の厚さaは大きいが、外周側の厚さbの薄い光学部品44を得ることができる(図6参照)。このため、光学部品44が装着されるカメラ等の光学機器の全長を短くすることができる。   According to this embodiment, the thin and strong optical component 44 in which the optical element 29 and the frame 30 are integrated can be obtained. That is, since the frame body 30 is formed by integrating the two punched plates 32 and the diaphragm plate 34 by a metal press, the thickness a in the optical axis direction inside the frame body 30 is large, but the thickness on the outer peripheral side. The thin optical component 44 of b can be obtained (see FIG. 6). For this reason, the total length of an optical device such as a camera on which the optical component 44 is mounted can be shortened.

また、断面略コ字状の溝31を有する枠体30を、旋削等によらずに金属プレスにより安価に製造することができる。さらに、光学素子29と枠体30とが一体化された光学部品44は、強度的に強いばかりでなく光軸方向の厚みが薄いので、光学機器に装着したときに、スペースの有効利用を図ることができる。
(第2の実施の形態)
次に、図10〜図12に基づき、第2の実施の形態を説明する。
Moreover, the frame 30 having the groove 31 having a substantially U-shaped cross section can be manufactured at low cost by a metal press without using turning or the like. Furthermore, the optical component 44 in which the optical element 29 and the frame 30 are integrated is not only strong in strength but also thin in the optical axis direction, so that effective use of space is achieved when it is mounted on an optical device. be able to.
(Second Embodiment)
Next, a second embodiment will be described based on FIGS.

本実施形態では、枠体50を構成する2枚の板材を、可塑性素材28を押圧する工程で一体化するものである。
図10において、枠体50(図12参照)は抜き板52と絞り板54との2枚の板材を有している。
In the present embodiment, the two plate members constituting the frame body 50 are integrated in the step of pressing the plastic material 28.
In FIG. 10, the frame body 50 (see FIG. 12) has two plate members, a punch plate 52 and a diaphragm plate 54.

抜き板52は、ドーナツ状の円板部53の中央に開口部58を有し、円板部53には円周に沿って略等間隔に多数のボス56が形成されている。このボス56は、前述した半切等のプレス手段によって形成される。絞り板54は、ドーナツ状の円板部55の中央に開口部60を有し、開口部60の周縁に絞り部62を有している。また、円板部55には円周に沿って多数の孔57が形成されている。この孔57は、抜き板52のボス56に対応して設けられている。また、抜き板52と絞り板54とは、全体の外径が同一の寸法を有している。ただし、後述するように材質は異なっている。   The punching plate 52 has an opening 58 at the center of a donut-shaped disc portion 53, and a large number of bosses 56 are formed at substantially equal intervals along the circumference of the disc portion 53. The boss 56 is formed by pressing means such as half-cutting as described above. The aperture plate 54 has an opening 60 at the center of the donut-shaped disc portion 55, and an aperture 62 at the periphery of the opening 60. In addition, a large number of holes 57 are formed in the disc portion 55 along the circumference. The hole 57 is provided corresponding to the boss 56 of the punching plate 52. Further, the blank plate 52 and the diaphragm plate 54 have the same overall outer diameter. However, the materials are different as will be described later.

絞り部62は、円板部55の内周側で略垂直に立ち上がる立ち上げ部64と、該立ち上げ部64の先端部から内側に略直角に折曲された折曲部66と、を有している。本実施形態では、抜き板52と絞り板54とは異なる線膨張係数を有している。そして、抜き板52の線膨張係数よりも、絞り板54の線膨張係数の方が大きい。   The restricting portion 62 has a rising portion 64 that rises substantially vertically on the inner peripheral side of the disc portion 55, and a bent portion 66 that is bent substantially perpendicularly inward from the tip end portion of the rising portion 64. is doing. In the present embodiment, the blank plate 52 and the diaphragm plate 54 have different linear expansion coefficients. The linear expansion coefficient of the diaphragm plate 54 is larger than the linear expansion coefficient of the punched plate 52.

材質としては、例えば、抜き板52としてコバール(鉄−Ni合金)を用い、絞り板54としてステンレス鋼(SUS鋼)を用いている。また、常温時において、絞り板54に形成された孔57の径は、抜き板52に形成されたボス56の径よりも数μm小さく仕上げられている。   As the material, for example, Kovar (iron-Ni alloy) is used as the blank plate 52 and stainless steel (SUS steel) is used as the diaphragm plate 54. Further, at the normal temperature, the diameter of the hole 57 formed in the diaphragm plate 54 is finished to be several μm smaller than the diameter of the boss 56 formed in the punch plate 52.

そして、図11に示すように、成形面68aを有する上型68と、成形面70aを有する下型70とを対向配置する。成形に際しては、下型70の成形面70aに可塑性素材(図示せず)を配置し、その周囲の載置面72に、抜き板52と絞り板54とを重ねた状態で配置する。次いで、可塑性素材(図示せず)が加熱されるが、該可塑性素材が加熱される温度では、線膨張係数の大きい絞り板54の孔57の径が抜き板52のボス56の径よりも大きくなる。   And as shown in FIG. 11, the upper mold | type 68 which has the molding surface 68a, and the lower mold | type 70 which has the molding surface 70a are opposingly arranged. At the time of molding, a plastic material (not shown) is arranged on the molding surface 70a of the lower mold 70, and the punching plate 52 and the diaphragm plate 54 are arranged on the mounting surface 72 around the plastic material (not shown). Next, a plastic material (not shown) is heated. At the temperature at which the plastic material is heated, the diameter of the hole 57 of the diaphragm plate 54 having a large linear expansion coefficient is larger than the diameter of the boss 56 of the punch plate 52. Become.

このため、上型68が下型70に接近移動することによって、上型68の外側に形成した突出部68bが絞り板54の円板部55の上面を押し、絞り板54の孔57が抜き板52のボス56に嵌まり込む(図12参照)。なお、絞り板54の自重で、絞り板54の孔57が抜き板52に嵌まり込む場合は、上型68の突出部68bが絞り板54の円板部55の上面を押す構成をとらなくても良いと考えられる。これにより、図12に示すように、抜き板52と絞り板54とが一体化される。これと同時に、枠体50に形成された断面コ字状の溝74に、可塑性素材が周囲に広がって入り込む。   Therefore, when the upper die 68 moves closer to the lower die 70, the protrusion 68b formed outside the upper die 68 presses the upper surface of the disc portion 55 of the diaphragm plate 54, and the hole 57 of the diaphragm plate 54 is removed. It fits into the boss 56 of the plate 52 (see FIG. 12). When the aperture 57 of the aperture plate 54 is fitted into the extraction plate 52 by the dead weight of the aperture plate 54, the protruding portion 68b of the upper mold 68 does not take a configuration of pushing the upper surface of the disc portion 55 of the aperture plate 54. I think it is okay. Thereby, as shown in FIG. 12, the punching plate 52 and the diaphragm plate 54 are integrated. At the same time, the plastic material spreads around the groove 74 having a U-shaped cross section formed in the frame 50.

すなわち、可塑性素材が押圧される過程で、該可塑性素材と枠体50とが一体的に密着接合される。やがて、上型68による押圧が終了して冷却が進むと、絞り板54の孔57の径が抜き板52のボス56の径よりも小さくなる。こうして、抜き板52と絞り板54とは焼き嵌めされる。   That is, in the process of pressing the plastic material, the plastic material and the frame body 50 are tightly joined together. Eventually, when the pressing by the upper die 68 ends and the cooling proceeds, the diameter of the hole 57 of the diaphragm plate 54 becomes smaller than the diameter of the boss 56 of the punch plate 52. In this way, the punching plate 52 and the diaphragm plate 54 are shrink-fitted.

本実施形態によれば、抜き板52と絞り板54とを一体化して枠体50を得る過程で、これと同時に、可塑性素材の成形が完了する。そして、冷却により抜き板52と絞り板54とが焼き嵌めによって固定される。また、抜き板52と絞り板54とを焼き嵌めにより強固に一体化することができる。さらに、枠体50を一体化する工程を別途設ける必要がないため、工数の削減を図ることができる。   According to the present embodiment, in the process of obtaining the frame body 50 by integrating the punching plate 52 and the diaphragm plate 54, the molding of the plastic material is completed at the same time. Then, the punching plate 52 and the diaphragm plate 54 are fixed by shrink fitting by cooling. Further, the punching plate 52 and the diaphragm plate 54 can be firmly integrated by shrink fitting. Furthermore, since it is not necessary to provide a separate process for integrating the frame body 50, man-hours can be reduced.

本実施形態における光学部品の製造装置の概略構成を示す図である。It is a figure which shows schematic structure of the manufacturing apparatus of the optical component in this embodiment. 同上の金型組立体の概略構成を示す図である。It is a figure which shows schematic structure of a metal mold | die assembly same as the above. 第1の実施の形態における枠体の分解斜視図である。It is a disassembled perspective view of the frame in 1st Embodiment. 抜き板と絞り板とを重ね合わせた状態を示す図である。It is a figure which shows the state which piled up the extraction plate and the aperture plate. 抜き板と絞り板との一体化の工程を示す図である。It is a figure which shows the process of integration with a punching board and an aperture plate. 抜き板と絞り板との一体化の工程を示す図である。It is a figure which shows the process of integration with a punching board and an aperture plate. 枠体の完成品の外観を示す図である。It is a figure which shows the external appearance of the finished product of a frame. 枠体を用いて光学素子を一体成形するときの状態を示す図である。It is a figure which shows the state when an optical element is integrally molded using a frame. 光学素子と枠体とが一体的に密着接合された光学部品の断面図である。It is sectional drawing of the optical component with which the optical element and the frame were integrally closely joined. 第2の実施の形態における抜き板と絞り板とを重ね合わせた状態を示す図である。It is a figure which shows the state which piled up the punching board and aperture plate in 2nd Embodiment. 上型と下型との間に抜き板と絞り板を配置した状態を示す図である。It is a figure which shows the state which has arrange | positioned the punching plate and the aperture plate between the upper mold | type and the lower mold | type. 抜き板と絞り板とを一体化してできた枠体を示す図である。It is a figure which shows the frame formed by integrating a punching board and an aperture plate. 従来の撮像レンズの断面図である。It is sectional drawing of the conventional imaging lens. 従来の撮像レンズの断面図である。It is sectional drawing of the conventional imaging lens.

符号の説明Explanation of symbols

10 光学部品の製造装置
12 下側プレート
14 上側プレート
16 下側カートリッジヒータ
18 上側カートリッジヒータ
20 金型組立体
22 下型
22a 成形面
23 載置面
24 上型
24a 成形面
26 スリーブ
27 孔
28 可塑性素材
29 光学素子
30 枠体
31 溝
32 抜き板
33 孔
34 絞り板
35 絞り部
36 立ち上げ部
37 折曲部
38 開口部
39 円板部
40 パンチ
41 円板部
42 開口部
44 光学部品
50 枠体
52 抜き板
53 円板部
54 絞り板
55 円板部
56 ボス
57 孔
58 開口部
60 開口部
62 絞り部
64 立ち上げ部
66 折曲部
68 上型
68a 成形面
70 下型
70a 成形面
72 載置面
74 溝
DESCRIPTION OF SYMBOLS 10 Optical component manufacturing apparatus 12 Lower plate 14 Upper plate 16 Lower cartridge heater 18 Upper cartridge heater 20 Mold assembly 22 Lower mold 22a Molding surface 23 Mounting surface 24 Upper mold 24a Molding surface 26 Sleeve 27 Hole 28 Plastic material DESCRIPTION OF SYMBOLS 29 Optical element 30 Frame 31 Groove 32 Extraction plate 33 Hole 34 Diaphragm plate 35 Diaphragm part 36 Starting part 37 Bending part 38 Opening part 39 Disc part 40 Punch 41 Disc part 42 Opening part 44 Optical component 50 Frame 52 Extraction plate 53 Disc portion 54 Diaphragm plate 55 Disc portion 56 Boss 57 Hole 58 Opening portion 60 Opening portion 62 Restriction portion 64 Raising portion 66 Bending portion 68 Upper die 68a Molding surface 70 Lower die 70a Molding surface 72 Mounting surface 74 Groove

Claims (5)

光学素子と枠体とを一体的に密着接合してなる光学部品において、
前記枠体は、少なくとも2枚の板材を一体化して構成される
ことを特徴とする光学部品。
In the optical component formed by tightly bonding the optical element and the frame integrally,
The frame is configured by integrating at least two plate members.
前記枠体は中央に開口部を有し、該開口部の周縁の光軸方向の厚さをaとし、前記枠体の外周側の光軸方向の厚さをbとしたとき、
a>bの関係を有する
ことを特徴とする請求項1に記載の光学部品。
The frame has an opening in the center, the thickness in the optical axis direction of the periphery of the opening is a, and the thickness in the optical axis direction on the outer peripheral side of the frame is b,
The optical component according to claim 1, wherein a relationship of a> b is satisfied.
前記開口部の周縁には、前記光学素子の外周部を挟み込む溝が形成されている
ことを特徴とする請求項1又は2に記載の光学部品。
The optical component according to claim 1, wherein a groove for sandwiching an outer peripheral portion of the optical element is formed at a peripheral edge of the opening.
前記少なくとも2枚の板材は、異なる線膨張係数を有する
ことを特徴とする請求項1〜3のいずれかに記載の光学部品。
The optical component according to claim 1, wherein the at least two plate members have different linear expansion coefficients.
対向する一対の成形型間に配置された可塑性素材と、その周囲に配置した枠体とを一体的に密着接合して光学部品を製造する光学部品の製造方法において、
前記枠体は夫々開口部を有する少なくとも2枚の板材を有し、該少なくとも2枚の板材を前記可塑性素材を押圧する工程で一体化し、形成された前記開口部の周縁の溝に前記可塑性素材を押圧しながら充填する
ことを特徴とする光学部品の製造方法。
In the method of manufacturing an optical component in which an optical component is manufactured by integrally tightly bonding a plastic material disposed between a pair of opposed molds and a frame disposed around the plastic material,
The frame body has at least two plate members each having an opening, and the plastic material is integrated into a groove at a periphery of the opening formed by integrating the at least two plates in a step of pressing the plastic material. A method for producing an optical component, wherein the filling is performed while pressing.
JP2007098782A 2007-04-04 2007-04-04 Optical component and method for manufacturing optical component Pending JP2008256938A (en)

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* Cited by examiner, † Cited by third party
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JP2010176088A (en) * 2009-02-02 2010-08-12 Olympus Corp Optical component, molding die, and method of manufacturing the optical component

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