JP2005200241A - Method for molding optical element and combined optical element - Google Patents

Method for molding optical element and combined optical element Download PDF

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JP2005200241A
JP2005200241A JP2004005806A JP2004005806A JP2005200241A JP 2005200241 A JP2005200241 A JP 2005200241A JP 2004005806 A JP2004005806 A JP 2004005806A JP 2004005806 A JP2004005806 A JP 2004005806A JP 2005200241 A JP2005200241 A JP 2005200241A
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optical
optical element
flange portion
outer edge
molding
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JP4362380B2 (en
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Hiroyasu Muto
弘泰 武藤
Hiroaki Fujita
浩明 藤田
Yasuhiko Sato
保彦 佐藤
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Fujinon Corp
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Fujinon Corp
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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
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C03B11/082—Construction of plunger or mould for making solid articles, e.g. lenses having profiled, patterned or microstructured surfaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/41—Profiled surfaces
    • C03B2215/414—Arrays of products, e.g. lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/46—Lenses, e.g. bi-convex
    • C03B2215/49—Complex forms not covered by groups C03B2215/47 or C03B2215/48
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/80—Simultaneous pressing of multiple products; Multiple parallel moulds

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Lens Barrels (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-numerical-aperture molded glass optical element capable of narrowing down a laser beam. <P>SOLUTION: The method for molding the optical element is one for molding an optical element in which the top face of an outer edge flange more outer than the flange adjacent to the optically functional face is formed in a position slightly higher than that of the vertex of the optically functional face, and a protrusion for preventing an adhesive from flowing into the optically functional face is formed on the outer edge flange, wherein the protrusion is formed on the outer edge flange by press-molding a glass material by using a molding die which is provided with a core for molding the optically functional face and the flange parts and in which slant milling is applied to the front end of a core fit hole into which the core is fitted or the front end of the core and transferring the profile of the groove formed by the slant milling. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、ガラス成形された小型の光学素子の成形方法に関する。   The present invention relates to a method for molding a small optical element molded with glass.

従来のガラス成形される光学素子は、加熱軟化されたガラス材料を成形型内に入れて加熱・加圧してプレス成形していた（特許文献１および２を参照）。
このようなプレス成形光学素子を、コンパクトディスク（ＣＤ）を読み取る際の光学系に用いた場合（特許文献２を参照）、レーザビームを小さなビームスポットとするために光学素子のＮＡ（開口数）を０．４５としていた。ＮＡ（Numerical Aperture）は、光学系に収差がない場合の集光限界を表す。従来のＣＤには赤い光のレーザ光が用いられ、このレーザ波長は７８０ｎｍであり、このレーザ光を光学素子で絞り込んでいた。
特開平５−７０１２５５号公報(図１) 特開２００３−１１９０３８号公報(図４、図９、図１１) Conventional optical elements to be glass-molded have been press-molded by placing a heat-softened glass material in a mold and heating and pressing (see Patent Documents 1 and 2).
When such a press-molding optical element is used in an optical system for reading a compact disc (CD) (see Patent Document 2), the NA (numerical aperture) of the optical element is used to make the laser beam a small beam spot. Was 0.45. NA (Numerical Aperture) represents the light collection limit when there is no aberration in the optical system. Conventional CDs use red laser light, the laser wavelength of which is 780 nm, and this laser light is narrowed down by an optical element.
Japanese Patent Laid-Open No. 5-701255 (FIG. 1) Japanese Patent Laying-Open No. 2003-119038 (FIGS. 4, 9, and 11)

従来の成形技術で成形された光学素子は、ＣＤを読み取るためのレーザ光の波長が７８０ｎｍ、ＮＡが０．４５程度までには対応できたが、より小さなビームスポットを実現するため光学素子によるさらなる光の絞り込みが必要となる場合には対応が困難であった。ＮＡは、焦点距離一定のときの開口瞳の大きさを示す値であり、ＮＡが大きいほどレーザ光が絞れ、高密度記録が可能となり、最近は、赤い光のレーザ光よりも短い波長の青紫色レーザ光（ブルーレーザ）を用い、ＮＡが０．６以上の光学素子を用いてディスクの記録を読み取るようになってきたが、ここで用いられる光学素子を従来のプレス成形技術で成形しようとすると、光学機能面となる凸部の曲面形状の曲率半径が小さく(表面の曲率が大きい)、きついカーブの曲面を成形するとともに、光学素子を設置するスペースとの関係からできるだけ小型化する必要もあり、成形するのが困難であった。このような光学素子成形用の成形型の加工も難しく、きついカーブの曲面を有する光学機能面とフランジ部との境界線部分の転写性も悪いものであった。   The optical element molded by the conventional molding technique can cope with the wavelength of the laser beam for reading the CD up to 780 nm and NA of about 0.45. However, in order to realize a smaller beam spot, the optical element is further improved. When it is necessary to narrow down the light, it was difficult to cope with it. NA is a value indicating the size of the aperture pupil when the focal length is constant, and the larger the NA, the narrower the laser beam and the higher the density recording possible. Recently, blue having a shorter wavelength than the red laser beam. It has come to read the record of the disk using an optical element with NA of 0.6 or more using a violet laser beam (blue laser), but trying to mold the optical element used here by a conventional press molding technique Then, the curvature radius of the curved surface shape of the convex part that becomes the optical function surface is small (the curvature of the surface is large), and it is necessary to mold a curved surface with a tight curve and to reduce the size as much as possible due to the space for installing the optical element. It was difficult to mold. Processing of such a mold for forming an optical element is difficult, and the transferability of the boundary line portion between the optical function surface having a tightly curved surface and the flange portion is also poor.

一方、１つの光学素子ではなく２つの光学素子を鏡筒に組み込み、それら２つの光学素子の組み合わせにより、レーザ光をより一層絞り込むことのできる高開口数を持たせたものも知られている。
しかしその場合、２つの光学素子の光軸方向における間隔を調整するために、間隔環を使用しなければならず、部品数も増え、精度も良くないという不具合があった。
かかる問題点を解消するため、２つの光学素子に形成した外縁フランジ部の頂面同士を接合することで間隔環を用いずに、高開口数の光学系を形成し、小型化も図れ、且つ光軸合わせも容易なガラス成形の組み合わせ光学素子を用いることが考えられる。
しかしながら、その場合には、外縁フランジ部の頂面に塗布した接着剤によって外縁フランジ部の頂面同士を接合するため、特に小型レンズの場合、フランジ面積が小さいために光学機能面に接着剤が流れ込む可能性が大きく、光学機能面に接着剤が付着し、製品としては使用できないものとなってしまう虞があった。 On the other hand, it is also known that two optical elements instead of one optical element are incorporated in a lens barrel, and a combination of these two optical elements has a high numerical aperture that can further narrow down the laser light.
However, in that case, in order to adjust the distance between the two optical elements in the optical axis direction, a spacing ring has to be used, resulting in an increase in the number of parts and poor accuracy.
In order to eliminate such problems, an optical system having a high numerical aperture can be formed without using a spacing ring by joining the top surfaces of the outer flange portions formed on the two optical elements, and the size can be reduced. It is conceivable to use a glass-molded combination optical element that can easily align the optical axis.
However, in this case, since the top surfaces of the outer edge flange portions are joined to each other by an adhesive applied to the top surface of the outer edge flange portion, particularly in the case of a small lens, an adhesive is applied to the optical function surface because the flange area is small. There is a possibility that the adhesive will adhere to the optical functional surface and become unusable as a product.

そこで本発明では、光学素子の外縁フランジ部の頂面に塗布した接着剤によって、２つの光学素子の外縁フランジ部頂面同士を接合し、高開口数の光学系を構成するようにした組み合わせ光学素子において、一方の光学素子の外縁フランジ部の頂面に、接着剤が光学機能面に流れ込むのを防止するための凸部を形成するとともに、他方の光学素子の前記凸部に対応する部分が逃げた形状になっている組み合わせ光学素子を提供することを目的とする。
また、そのような光学素子が、簡単な型構造で成形することができることを目的とする。 Therefore, in the present invention, a combination optical system in which the top surfaces of the outer edge flange portions of the two optical elements are bonded to each other by an adhesive applied to the top surface of the outer edge flange portion of the optical element to constitute a high numerical aperture optical system. In the element, a convex portion for preventing the adhesive from flowing into the optical functional surface is formed on the top surface of the outer edge flange portion of one optical element, and a portion corresponding to the convex portion of the other optical element is formed. It is an object of the present invention to provide a combined optical element that has an escaped shape.
Another object of the present invention is to form such an optical element with a simple mold structure.

上述の目的を達成するため、本発明は、光学機能面の頂点よりも若干高くなる位置に、光学機能面に隣接するフランジ部よりも外側の外縁フランジ部の頂面が形成され、かつ外縁フランジ部に、接着剤が光学機能面に流れ込むのを防止するための凸部を形成した光学素子を成形する方法において、光学機能面及びフランジ部を成形する中子を備え、かつ前記中子を嵌合する中子嵌合孔の先端、または中子の先端に傾斜加工を施した成形型を用いてガラス材料をプレス成形し、前記傾斜加工により形成された溝部の形状を転写することによって、外縁フランジ部に凸部を形成する。   In order to achieve the above-mentioned object, according to the present invention, the top surface of the outer edge flange portion outside the flange portion adjacent to the optical function surface is formed at a position slightly higher than the apex of the optical function surface, and the outer edge flange is formed. In the method of molding an optical element having a convex portion for preventing the adhesive from flowing into the optical function surface, a core for molding the optical function surface and the flange portion is provided, and the core is fitted. The outer edge is formed by press-molding a glass material using a molding die in which the tip of the core fitting hole to be joined or the tip of the core is tilted and transferring the shape of the groove formed by the tilt processing. A convex part is formed in the flange part.

本発明によれば、外縁フランジ部に供給した接着剤が光学機能面に流れ込む虞がない小型の光学レンズを、成形型の転写面に凹加工を施すことなく、容易に成形することができる。   According to the present invention, it is possible to easily mold a small optical lens in which the adhesive supplied to the outer edge flange portion does not flow into the optical function surface without performing a concave process on the transfer surface of the mold.

以下に、本発明の実施形態について、図面を参照にして説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１に示す実施形態は、ガラス材料をプレス成形して凸状の光学機能面１，２がそれぞれ成形された光学素子１０，２０を接合した組み合わせ光学素子の断面図であり、図１（ａ）に示すように、それそれの光学素子１０，２０には、光学機能面１，２の頂点よりも若干高くなる位置に光学機能面１，２に隣接するフランジ部３，４よりも外側の外縁フランジ部５，６の頂面を形成してある。
また第１の光学素子１０には、外縁フランジ部５の頂面に供給した接着剤８が光学機能面に流れ込むのを防止するための凸部７を形成してある。
そして図１（ｂ）に示すように、第１の光学素子１０の外縁フランジ部５に形成した凸部７が、第２の光学素子２０の外縁フランジ部６の頂面に当接しないように、第１及び第２の光学素子１０，２０を対向させ、接着剤８を用いて第１及び第２の光学素子の外縁フランジ部同士５，６を接合してある。つまり、第２の光学素子２０の外縁フランジ部６の形状が、対向する第１の光学素子１０の外縁フランジ部５に形成された凸部７を逃げた形状に形成されている。 The embodiment shown in FIG. 1 is a cross-sectional view of a combined optical element in which optical elements 10 and 20 having convex optical functional surfaces 1 and 2 formed by press molding a glass material are joined, and FIG. ), The respective optical elements 10 and 20 have outer portions than the flange portions 3 and 4 adjacent to the optical function surfaces 1 and 2 at positions slightly higher than the vertices of the optical function surfaces 1 and 2, respectively. The top surfaces of the outer flange portions 5 and 6 are formed.
The first optical element 10 is provided with a convex portion 7 for preventing the adhesive 8 supplied to the top surface of the outer edge flange portion 5 from flowing into the optical functional surface.
And as shown in FIG.1 (b), the convex part 7 formed in the outer edge flange part 5 of the 1st optical element 10 does not contact | abut on the top face of the outer edge flange part 6 of the 2nd optical element 20. As shown in FIG. The first and second optical elements 10 and 20 are opposed to each other, and the outer edge flange portions 5 and 6 of the first and second optical elements are bonded to each other using an adhesive 8. That is, the shape of the outer edge flange portion 6 of the second optical element 20 is formed so as to escape the convex portion 7 formed on the outer edge flange portion 5 of the opposing first optical element 10.

図２及び図３に示すプレス成形装置は、複数の光学素子１０が同時にプレス成形され、連結されたシート状になった光学素子アレイのプレス成形装置を示す断面図であり、上下一対の成形型（上型２１と下型２２）を使用するものである。
このプレス成形装置は、上型２１に対向して下型２２を配置し、両脇には側型２６を配し、これらで囲まれた空間すなわちキャビティ２５にガラス材料を載置し、上型２１と下型２２とを締結することによりガラス材料を加熱プレスして成形するものである。上型２１には複数の中子嵌合孔が形成され、各中子嵌合孔に嵌合されている中子２３には、曲率の大きな凸状の光学機能面１とそれに隣接するフランジ部３とを形成するための転写面が形成してある。また上型２１の中子嵌合孔の周囲には、外縁フランジ部５を成形するための転写面が設けられている。 2 and 3 is a cross-sectional view showing a press molding apparatus for an optical element array in which a plurality of optical elements 10 are simultaneously press-molded and connected into a sheet shape, and a pair of upper and lower molding dies. (Upper mold 21 and lower mold 22) are used.
In this press molding apparatus, a lower mold 22 is disposed opposite to an upper mold 21, side molds 26 are arranged on both sides, and a glass material is placed in a space surrounded by these, that is, a cavity 25. The glass material is heated and pressed by fastening 21 and the lower mold 22 together. The upper mold 21 is formed with a plurality of core fitting holes, and the core 23 fitted in each core fitting hole has a convex optical functional surface 1 having a large curvature and a flange portion adjacent thereto. 3 is formed. A transfer surface for molding the outer edge flange portion 5 is provided around the core fitting hole of the upper die 21.

図２に示す実施例では、中子嵌合孔の周壁先端に傾斜加工を施し、傾斜面２１Ａを形成することによって、中子２３を嵌合する中子嵌合孔の先端付近に、中子嵌合孔の周壁に沿って溝部２４ａを形成した。
そして、キャビティ２５内に載置したガラス材料をプレス成形することによって、複数の光学素子１０が連結したシート状の光学素子アレイを成形し、前記溝部２４ａの形状が転写され、外縁フランジ部５の頂面に凸部７が形成された光学素子１０を同時に複数成形した。
外縁フランジ部５の頂面に塗布した接着剤が光学機能面１に流れ込まない程度の大きさの凸部７が形成されるように、中子嵌合孔の先端付近に傾斜面２１Ａを形成して溝部２４ａを形成すれば充分であり、あまり大きな溝部２４ａを形成して外縁フランジ部５の頂面に大きな凸部７が形成されるように構成したものは、レンズの取り扱い上好ましくない。 In the embodiment shown in FIG. 2, the peripheral wall tip of the core fitting hole is inclined to form an inclined surface 21 </ b> A, so that the core near the tip of the core fitting hole for fitting the core 23 is formed. A groove 24a was formed along the peripheral wall of the fitting hole.
Then, the glass material placed in the cavity 25 is press-molded to form a sheet-like optical element array in which a plurality of optical elements 10 are connected, and the shape of the groove 24a is transferred, so that the outer flange portion 5 A plurality of optical elements 10 having convex portions 7 formed on the top surface were simultaneously molded.
An inclined surface 21A is formed in the vicinity of the tip of the core fitting hole so that the convex portion 7 is formed in such a size that the adhesive applied to the top surface of the outer flange portion 5 does not flow into the optical function surface 1. It is sufficient to form the groove portion 24a, and it is not preferable in terms of lens handling that the large groove portion 24a is formed so that the large convex portion 7 is formed on the top surface of the outer edge flange portion 5.

図３に示す実施例では、中子２３の先端に傾斜加工を施して傾斜面２３Ａを形成するとともに、前記傾斜面２３Ａの上端を中子嵌合孔の先端より上方に配置することによって、中子２３を嵌合する中子嵌合孔の先端付近に、中子嵌合孔の周壁に沿って溝部２４ｂを形成した。
そして、キャビティ２５内に載置したガラス材料をプレス成形することによって、複数の光学素子１０が連結したシート状の光学素子アレイを成形し、前記溝部２４ｂの形状が転写され、外縁フランジ部５の頂面に凸部７が形成された光学素子１０を同時に複数成形した。
外縁フランジ部５の頂面に塗布した接着剤が光学機能面１に流れ込まない程度の大きさの凸部７が形成されるように、中子２３の先端に傾斜面２３Ａを形成して溝部２４ｂを形成すれば充分であり、あまり大きな溝部２４ｂを形成して外縁フランジ部５の頂面に大きな凸部７が形成されるように構成したものは、レンズの取り扱い上好ましくない。 In the embodiment shown in FIG. 3, the tip of the core 23 is inclined to form an inclined surface 23A, and the upper end of the inclined surface 23A is disposed above the tip of the core fitting hole. A groove 24b was formed in the vicinity of the tip of the core fitting hole for fitting the core 23 along the peripheral wall of the core fitting hole.
Then, the glass material placed in the cavity 25 is press-molded to form a sheet-like optical element array in which a plurality of optical elements 10 are connected, the shape of the groove 24b is transferred, and the outer flange portion 5 A plurality of optical elements 10 having convex portions 7 formed on the top surface were simultaneously molded.
An inclined surface 23A is formed at the tip of the core 23 so that the adhesive 7 applied to the top surface of the outer flange portion 5 does not flow into the optical function surface 1, and a groove portion 24b is formed. It is sufficient for the lens to be formed, and it is not preferable in terms of handling the lens that the groove 24b is formed so that the large convex portion 7 is formed on the top surface of the outer flange portion 5.

図４は、図２または図３のプレス成形装置で成形された光学素子アレイを示すものであり、複数の光学素子１０が同時にプレス成形され、連結されてシート状になったものである。
これらの実施例では、光学機能面１の頂点よりも若干高くなる位置に、光学機能面１に隣接するフランジ部３よりも外側の外縁フランジ部５の頂面が形成され、かつ外縁フランジ部５の頂面に供給した接着剤が光学機能面に流れ込むのを防止するための凸部７が形成された、口径３ｍｍ以下の小型の光学素子１０を同時に複数成形することができる。 FIG. 4 shows an optical element array molded by the press molding apparatus of FIG. 2 or FIG. 3, in which a plurality of optical elements 10 are simultaneously press molded and connected to form a sheet.
In these embodiments, the top surface of the outer edge flange portion 5 outside the flange portion 3 adjacent to the optical function surface 1 is formed at a position slightly higher than the apex of the optical function surface 1, and the outer edge flange portion 5 is formed. A plurality of small optical elements 10 having a diameter of 3 mm or less, on which convex portions 7 for preventing the adhesive supplied to the top surface from flowing into the optical function surface are formed, can be formed simultaneously.

なお図２または図３のプレス成形装置で成形された直後は、フランジ部３の厚みｔは０．３ｍｍ以上であり、この光学機能面１の反対側の平坦な面を研磨して０．３ｍｍ未満とする。この実施形態では、フランジ部の厚みが０．３ｍｍ以上の光学素子アレイをプレス成形した後に、光学機能面１とは反対側の面を研磨して、フランジ部を０．３ｍｍ未満にするので、従前の成形方法に比べてフランジ部の厚みを薄くすることができ、かつ光学素子アレイの割れも防止することができる。   Immediately after being molded by the press molding apparatus of FIG. 2 or FIG. 3, the thickness t of the flange portion 3 is 0.3 mm or more, and the flat surface opposite to the optical function surface 1 is polished to 0.3 mm. Less than. In this embodiment, after press molding an optical element array having a flange portion thickness of 0.3 mm or more, the surface opposite to the optical function surface 1 is polished to make the flange portion less than 0.3 mm. The thickness of the flange portion can be reduced as compared with the conventional molding method, and cracking of the optical element array can be prevented.

この実施例では、外縁フランジ部５の頂面に接着剤を塗布し、第１の光学素子１０が複数連結されているシート状の光学素子アレイと、第２の光学素子２０が複数連結されているシート状の光学素子アレイとを接合した後、外縁フランジ部５，６の個所で光学素子アレイを切断することによって、個々の光学素子を切り出し、図１に示す実施形態のように、第１及び第２光学素子１０，２０が接合した組み合わせ光学素子を同時に複数個取得した。   In this embodiment, an adhesive is applied to the top surface of the outer edge flange portion 5, and a plurality of first optical elements 10 and a plurality of second optical elements 20 are connected to each other. After joining the sheet-like optical element array, each optical element is cut out by cutting the optical element array at the outer edge flange portions 5 and 6, and the first optical element array as shown in FIG. A plurality of combined optical elements joined with the second optical elements 10 and 20 were simultaneously obtained.

この発明の組み合わせ光学素子の好適な実施形態を示す断面図。Sectional drawing which shows suitable embodiment of the combination optical element of this invention. 光学素子をプレス成形するための第１実施例による成形型の断面図。Sectional drawing of the shaping | molding die by 1st Example for press-molding an optical element. 光学素子をプレス成形するための第２実施例による成形型の断面図。Sectional drawing of the shaping | molding die by 2nd Example for press-molding an optical element. 図２または図３の成形型で成形された直後の製品を示す断面図。Sectional drawing which shows the product immediately after shape | molding with the shaping | molding die of FIG. 2 or FIG.

符号の説明Explanation of symbols

１０，２０ 光学素子
１，２ 凸状の光学機能面
３，４ 光学機能面に隣接したフランジ部
５，６ 外縁フランジ部
７ 凸部
２１ 上型
２１Ａ 傾斜面
２２ 下型
２３ 中子
２３Ａ 傾斜面
２４ａ，２４ｂ 溝部
２５ キャビティ
２６ 側型 DESCRIPTION OF SYMBOLS 10,20 Optical element 1, 2 Convex optical functional surface 3, 4 Flange part adjacent to optical functional surface 5, 6 Outer edge flange part 7 Convex part 21 Upper mold | type 21A Inclined surface 22 Lower mold | type 23 Core 23A Inclined surface 24a 24b Groove 25 Cavity 26 Side mold

Claims (4)

光学機能面の頂点よりも若干高くなる位置に、光学機能面に隣接するフランジ部よりも外側の外縁フランジ部の頂面が形成され、かつ外縁フランジ部に、接着剤が光学機能面に流れ込むのを防止するための凸部を形成した光学素子を成形する方法において、
光学機能面及びフランジ部を成形する中子を備え、かつ前記中子を嵌合する中子嵌合孔の先端に傾斜加工を施した成形型を用いてガラス材料をプレス成形し、
前記傾斜加工により形成された溝部の形状を転写することによって、外縁フランジ部に凸部を形成することを特徴とする光学素子の成形方法。 The top surface of the outer edge flange portion outside the flange portion adjacent to the optical function surface is formed at a position slightly higher than the apex of the optical function surface, and the adhesive flows into the optical function surface in the outer edge flange portion. In a method of molding an optical element formed with a convex portion for preventing
A glass material is press-molded using a molding die provided with a core that molds the optical functional surface and the flange portion, and the tip of the core fitting hole for fitting the core is subjected to an inclination process,
A method of forming an optical element, wherein a convex portion is formed on an outer edge flange portion by transferring a shape of a groove portion formed by the tilting process. 光学機能面の頂点よりも若干高くなる位置に、光学機能面に隣接するフランジ部よりも外側の外縁フランジ部の頂面が形成され、かつ外縁フランジ部に、接着剤が光学機能面に流れ込むのを防止するための凸部を形成した光学素子を成形する方法において、
光学機能面及びフランジ部を成形する中子を備え、かつ前記中子の先端に傾斜加工を施した成形型を用いてガラス材料をプレス成形し、
前記傾斜加工により形成された溝部の形状を転写することによって、外縁フランジ部に凸部を形成することを特徴とする光学素子の成形方法。 The top surface of the outer edge flange portion outside the flange portion adjacent to the optical function surface is formed at a position slightly higher than the apex of the optical function surface, and the adhesive flows into the optical function surface in the outer edge flange portion. In a method of molding an optical element formed with a convex portion for preventing
A glass material is press-molded using a mold having an optical functional surface and a core that molds the flange portion, and a tip that is inclined at the tip of the core,
A method of forming an optical element, wherein a convex portion is formed on an outer edge flange portion by transferring a shape of a groove portion formed by the tilting process. ガラス材料をプレス成形して凸状の光学機能面が成形された光学素子を２つ接合した組み合わせ光学素子において、
光学機能面の頂点よりも若干高くなる位置に、光学機能面に隣接するフランジ部よりも外側の外縁フランジ部の頂面を形成して第１及び第２の光学素子を構成するとともに、
第１の光学素子の外縁フランジ部に供給した接着剤が光学機能面に流れ込むのを防止するための凸部を形成し、
さらに前記凸部が第２光学素子の外縁フランジ部に当接しないように第１及び第２の光学素子を対向させ、接着剤を用いて第１及び第２の光学素子の外縁フランジ部同士を接合したことを特徴とする組み合わせ光学素子。 In a combined optical element in which two optical elements having a convex optical functional surface formed by press molding a glass material are joined,
The top surface of the outer edge flange portion outside the flange portion adjacent to the optical function surface is formed at a position slightly higher than the vertex of the optical function surface to constitute the first and second optical elements, and
Forming a convex portion for preventing the adhesive supplied to the outer edge flange portion of the first optical element from flowing into the optical functional surface;
Further, the first and second optical elements are opposed to each other so that the convex portion does not contact the outer edge flange portion of the second optical element, and the outer edge flange portions of the first and second optical elements are bonded to each other using an adhesive. A combined optical element characterized by being bonded. ガラス材料のプレス成形後に凸状の光学機能面とは反対側の面を研磨することによって、フランジ部の厚さを０．３ｍｍ未満としたことを特徴とする請求項３に記載の組み合わせ光学素子。   The combined optical element according to claim 3, wherein the flange portion has a thickness of less than 0.3 mm by polishing a surface opposite to the convex optical functional surface after press molding of the glass material. .
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JPWO2017159410A1 (en) * 2016-03-17 2019-01-24 Ａｇｃ株式会社 Glass plate and glass structure
JP2020106856A (en) * 2014-05-16 2020-07-09 ヘプタゴン・マイクロ・オプティクス・プライベート・リミテッドＨｅｐｔａｇｏｎ Ｍｉｃｒｏ Ｏｐｔｉｃｓ Ｐｔｅ． Ｌｔｄ． Wafer-level method of devices, in particular, optical devices

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JP2020106856A (en) * 2014-05-16 2020-07-09 ヘプタゴン・マイクロ・オプティクス・プライベート・リミテッドＨｅｐｔａｇｏｎ Ｍｉｃｒｏ Ｏｐｔｉｃｓ Ｐｔｅ． Ｌｔｄ． Wafer-level method of devices, in particular, optical devices
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JPWO2017159410A1 (en) * 2016-03-17 2019-01-24 Ａｇｃ株式会社 Glass plate and glass structure

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