WO2018029945A1 - Optical lens and method for manufacturing same - Google Patents

Optical lens and method for manufacturing same Download PDF

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Publication number
WO2018029945A1
WO2018029945A1 PCT/JP2017/020035 JP2017020035W WO2018029945A1 WO 2018029945 A1 WO2018029945 A1 WO 2018029945A1 JP 2017020035 W JP2017020035 W JP 2017020035W WO 2018029945 A1 WO2018029945 A1 WO 2018029945A1
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Prior art keywords
lens
optical lens
optical
protrusion
mold
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PCT/JP2017/020035
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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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Publication of WO2018029945A1 publication Critical patent/WO2018029945A1/en

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    • 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 an optical lens used for an optical communication module and the like, and a method for manufacturing the optical lens.
  • an optical lens is used as an optical connecting element in an optical communication module.
  • Such an optical lens can be used, for example, disposed between one optical fiber and another optical fiber, and condenses the light emitted from the end face of one optical fiber on the end face of the other optical fiber. Can do.
  • an optical lens having a lens surface facing one optical fiber and a lens surface facing another optical fiber can be used.
  • Patent Document 1 discloses an optical lens in which a lens surface is provided on each of a pair of end surfaces facing each other as an example of such an optical lens. On the upper surface of the optical lens, a mark recognizable from the outside extending linearly in the optical axis direction of the lens portion is provided.
  • Patent Document 1 discloses a method for pressurizing a preform (heat-softened optical element material) using a mold as a method for manufacturing such an optical lens.
  • the molding die includes an upper die and a lower die, and a sleeve that is a die that forms the periphery of the side surface. And the groove part for forming the mark which can be recognized from the outside is formed in the metal mold
  • An object of the present invention is to provide an optical lens and a method for manufacturing the optical lens, which can accurately align the optical axis.
  • An optical lens according to the present invention has first and second end surfaces facing each other, a first lens surface is disposed on the first end surface, and a second end surface is disposed on the second end surface.
  • the first lens surface is smaller than the second lens surface.
  • the lens body has an upper surface connecting the first and second end surfaces, and the protrusion or the groove extends to the upper surface.
  • An optical lens manufacturing method is an optical lens manufacturing method configured according to the present invention, comprising: an upper mold provided with a first recess for forming the first lens surface; And a lower molding die provided with a second recess for forming the second lens surface, and the protrusion on the portion of the upper molding die where the first recess is not disposed.
  • a step of preparing a molding die further provided with a third concave portion or a convex portion for forming a groove portion, and a mother base material disposed between the upper molding die and the lower molding die in the molding die And a step of press-molding the mother substrate with the mold.
  • FIG. 1 is a schematic perspective view showing an optical lens according to the first embodiment of the present invention.
  • FIG. 2 is a schematic side view showing the optical lens according to the first embodiment of the present invention.
  • FIG. 3 is a schematic front view showing a mold used in the method of manufacturing an optical lens according to the first embodiment of the present invention.
  • FIG. 4 is a schematic front view for explaining the positional relationship of the mother base material in the optical lens manufacturing method according to the first embodiment of the present invention.
  • FIG. 5 is a schematic side view for explaining the position of the cut line when dividing the mother base material in the optical lens manufacturing method according to the first embodiment of the present invention.
  • FIG. 6 is a schematic perspective view showing an optical lens according to the second embodiment of the present invention.
  • FIG. 7 is a schematic perspective view showing an optical lens according to the third embodiment of the present invention.
  • FIG. 8 is a schematic plan view showing a mold used in the manufacturing method of the optical lens of the comparative example.
  • FIG. 1 is a schematic perspective view showing an optical lens according to the first embodiment of the present invention.
  • FIG. 2 is a schematic side view showing the optical lens according to the first embodiment of the present invention.
  • the optical lens 1 includes a lens body 2 and a protrusion 3.
  • the lens body 2 has a substantially rectangular parallelepiped shape.
  • the lens body 2 includes first and second end surfaces 2a and 2b, upper and lower surfaces 2c and 2d, and first and second side surfaces 2e and 2f.
  • the first and second end faces 2a and 2b face each other.
  • the upper and lower surfaces 2c and 2d, and the first and second side surfaces 2e and 2f connect the first and second end surfaces 2a and 2b, respectively.
  • the first and second side surfaces 2e and 2f connect the upper surface and the lower surface 2c and 2d, respectively.
  • the direction connecting the first end face 2a and the second end face 2b is the optical axis direction y.
  • a direction connecting the first and second side surfaces 2e and 2f is defined as a width direction x.
  • a direction connecting the upper surface and the lower surfaces 2c and 2d is a height direction z.
  • the first end surface 2 a has a first lens surface 4.
  • the first lens surface 4 has a circular planar shape. In the first end face 2a, the first lens surface 4 is curved in a convex shape.
  • the second end surface 2 b has a second lens surface 5.
  • the second lens surface 5 also has a circular planar shape.
  • the second lens surface 5 is curved in a convex shape.
  • the first and second lens surfaces 4 and 5 may have the same size. In the present invention, it is sufficient that at least one of the first and second lens surfaces 4 and 5 is provided.
  • a protrusion 3 is provided on the first end surface 2 a of the lens body 2.
  • the protrusion 3 is provided as an alignment mark when aligning the optical axis.
  • the protrusion part 3 is not arrange
  • the protrusion 3 may be provided on the second end surface 2b.
  • the protrusion 3 is provided. From the viewpoint of securing a wider space for formation, it is preferable to provide the first end surface 2a.
  • first to fourth protrusions 6 to 9 are provided as the protrusions 3.
  • Each of the first to fourth protrusions 6 to 9 has a substantially triangular prism shape, and protrudes from the first end surface 2a in a V shape when viewed from the upper surface 2c side.
  • the first and second protrusions 6 and 7 are provided closer to the first side surface 2e than the first lens surface 4 in the width direction x.
  • the first protrusion 6 is provided on the upper surface 2c side in the height direction z. More specifically, the first protrusion 6 extends along the height direction z and extends to the upper surface 2c. The end surface 6a of the first protrusion 6 is located on the same plane as the upper surface 2c.
  • the second protrusion 7 is provided on the lower surface 2d side in the height direction z. More specifically, the second protrusion 7 extends along the height direction z and extends to the lower surface 2d. The end surface 7a of the second protrusion 7 is located on the same plane as the lower surface 2d.
  • the first and second protrusions 6 and 7 are disposed at the same position in the width direction x. That is, the first and second protrusions 6 and 7 are provided so as to overlap when viewed from the upper surface 2c side.
  • the first and second protrusions 6 and 7 may not be continuous as in the present embodiment, but may be integrally connected. That is, the protrusion part 3 extended continuously from the upper surface 2c to the lower surface 2d may be provided.
  • the third and fourth protrusions 8 and 9 are provided on the first end surface 2a on the second side surface 2f side from the first lens surface 4.
  • the third protrusion 8 is provided on the upper surface 2c side in the height direction z. More specifically, the third protrusion 8 extends along the height direction z and extends to the upper surface 2c.
  • the end surface 8a of the third protrusion 8 is located on the same plane as the upper surface 2c.
  • the fourth protrusion 9 is provided on the lower surface 2d side in the height direction z. More specifically, the fourth protrusion 9 extends along the height direction z and extends to the lower surface 2d.
  • the end surface 9a of the fourth protrusion 9 is located on the same plane as the lower surface 2d.
  • the third and fourth protrusions 8 and 9 are disposed at the same position in the width direction x. That is, the 3rd and 4th projection parts 8 and 9 are provided so that it may overlap, when it sees from the upper surface 2c side.
  • the third and fourth protrusions 8 and 9 do not have to be continuous as in this embodiment, but may be continuous. That is, the protrusion part 3 extended continuously from the upper surface 2c to the lower surface 2d may be provided.
  • the protrusion 3 is provided on the first end surface 2 a of the lens body 2. Therefore, for example, when the optical lens 1 is mounted on the substrate, the optical axis can be accurately aligned using the protrusion 3 as an alignment mark.
  • the optical lens 1 can accurately align the optical axis, for example, when used in a connecting element of an optical communication module, it is possible to combine light with high accuracy and to increase the light coupling efficiency. be able to. Therefore, the optical lens 1 can be suitably used for an optical connecting element of an optical communication module.
  • the end surfaces 6a and 8a of the first and third protrusions 6 and 8 are provided on the same plane as the upper surface 2c as in the present embodiment, when the optical axis is aligned, The protrusion can be confirmed even more easily. Therefore, by arranging the end surfaces 6a and 8a of the first and third protrusions 6 and 8 on the same plane as the upper surface 2c, the optical axes can be aligned with higher accuracy.
  • the lens body 2 is formed using a molding die shown below.
  • FIG. 3 is a schematic front view showing a mold used in the method of manufacturing an optical lens according to the first embodiment of the present invention.
  • the mold 10 includes an upper mold 11 (upper mold), a lower mold 12 (lower mold), and a side mold 13 (side mold).
  • the upper mold 11 is provided with a plurality of first recesses 11a and a plurality of third recesses 11b.
  • the first concave portion 11 a has a shape corresponding to the convex first lens surface 4.
  • the third recess 11 b has a shape corresponding to the protrusion 3.
  • the third recess 11b has a shape corresponding to the first to fourth protrusions 6-9.
  • the lower mold 12 is provided with a plurality of second recesses 12a.
  • the second concave portion 12 a has a shape corresponding to the convex second lens surface 5.
  • the first and second recesses 11a and 12a are provided so as to face each other.
  • the side mold 13 has a frame shape. In the present embodiment, the side mold 13 is not provided with a recess for forming the protrusion 3.
  • the optical lens 1 is formed using the mold 10. Specifically, first, as shown in FIG. 4, the mother base material 14 that is the base material of the plurality of optical lenses 1 is disposed between the upper mold 11, the lower mold 12, and the side mold 13. . Subsequently, the mother base material 14 is pressed by using the upper mold 11 and the lower mold 12 to mold the molded product 17 of the mother base. Next, the obtained mother base molding 17 is divided along the cut line L shown in FIG. 5 to obtain the lens body 2 shown in FIG.
  • the method for dividing the molded article 17 of the mother base material is not particularly limited, and for example, it can be performed by scribing such as laser scribing, folding, or dicing. Among these, from the viewpoint of further improving the smoothness of the sectional surface, it is preferable to divide the mother base material 14 by laser scribing.
  • the upper mold 11 is provided with the plurality of third recesses 11b for forming the first to fourth protrusions 6 to 9, and therefore, at the time of manufacturing.
  • the first to fourth protrusions 6 to 9 are less likely to be misaligned. Therefore, the optical lens 1 obtained by the manufacturing method of the present embodiment can accurately align the optical axis. This will be described in more detail below.
  • FIG. 8 is a schematic plan view showing a mold used in the manufacturing method of the optical lens of the comparative example.
  • a mold 101 used in the method for manufacturing an optical lens of the comparative example has an upper mold 102, a lower mold (not shown), and a frame-shaped side mold 103.
  • the upper mold 102 and the lower mold, and the side mold 103 are provided as separate members.
  • a concave portion 104 for forming a protrusion as an alignment mark is provided in the side portion mold 103.
  • a gap suitable for operation is required to be at least several ⁇ m.
  • the upper mold 102 (and the lower mold) provided with the lens surface is a separate member from the side mold 103 provided with the protrusions, the upper mold 102 is subjected to pressing. As a result, a positional shift corresponding to the gap between the side molds 103 occurs. For this reason, in the optical lens obtained using such a mold 101, the protrusions may be displaced from the target position. Therefore, the alignment of the optical axis could not be performed with high accuracy.
  • the third recess 11b for forming the first to fourth protrusions 6 to 9 has the first recess for forming the first lens surface 4. Since it is provided in the same upper mold 11 as the recess 11a, the above-described positional deviation is unlikely to occur during pressing. Therefore, in the optical lens 1 obtained by the manufacturing method of the present embodiment, the first to fourth protrusions 6 to 9 as alignment marks can be formed at target positions. Thus, since the first to fourth protrusions 6 to 9 can be formed at the target positions, the optical axes are accurately aligned using the first to fourth protrusions 6 to 9. It can be carried out.
  • the first to fourth protrusions 6 to 9 are provided on the same first end surface 2 a as the first lens surface 4. Therefore, as shown in FIG. 5, the protrusion 3 can also be used as a mark when cutting the plurality of optical lenses 1 from the molded article 17 of the mother substrate. Therefore, in the manufacturing method of this embodiment, the optical lens 1 in which the variation in shape between lots is suppressed can be easily formed. Since the first to fourth protrusions 6 to 9 are provided on the same first end surface 2a as the first lens surface 4, the first and second side surfaces 2e and 2f are smooth. Even in this case, the positions of the first and second side surfaces 2e and 2f can be easily detected.
  • Lens body Although it does not specifically limit as a material which comprises a lens main body, for example, it can comprise with glass, ceramics, a semiconductor, or resin. From the viewpoint of obtaining higher optical characteristics and obtaining higher durability, the lens body is preferably made of glass.
  • the glass examples include SiO 2 —B 2 O 3 —RO (R is Mg, Ca, Sr, or Ba) glass, SiO 2 —B 2 O 3 —R ′ 2 O (R ′ is Li, Na, or Ka). ) Series glass, SiO 2 —B 2 O 3 —RO—R ′ 2 O (R ′ is Li, Na or Ka) series glass, SnO—P 2 O 5 series glass, TeO 2 series glass or Bi 2 O 3 series Glass or the like can be used.
  • the protrusion may be made of the same material as that of the lens body, or may be made of another material. However, as described above, it is preferable that the protrusion is formed by integrally molding with the lens body, and therefore, it is preferable that the protrusion is made of the same material as the lens body.
  • the material constituting the protruding portion is not particularly limited, but can be constituted by, for example, glass, ceramics, semiconductor, resin, or the like. From the viewpoint of obtaining higher optical characteristics and obtaining higher durability, the lens body is preferably made of glass.
  • the glass examples include SiO 2 —B 2 O 3 —RO (R is Mg, Ca, Sr, or Ba) glass, SiO 2 —B 2 O 3 —R ′ 2 O (R ′ is Li, Na, or Ka). ) Series glass, SiO 2 —B 2 O 3 —RO—R ′ 2 O (R ′ is Li, Na or Ka) series glass, SnO—P 2 O 5 series glass, TeO 2 series glass or Bi 2 O 3 series Glass or the like can be used.
  • FIG. 6 is a schematic perspective view showing an optical lens according to the second embodiment of the present invention.
  • one protrusion 15 having a substantially triangular pyramid shape is provided in the optical lens 21 of the second embodiment.
  • the protrusion 15 is provided at the center in the width direction x on the first end surface 2a. Further, the end surface 15a of the protrusion 15 is provided on the same plane as the upper surface 2c, and is provided so as to overlap the center of the first lens surface 4 in the height direction z. Other points are the same as in the first embodiment.
  • the protrusion 15 is provided on the first end surface 2a of the lens body 2, and overlaps the center of the first lens surface 4 in the height direction z. Is provided. Therefore, by using the projection 15 as an alignment mark, the optical axis can be aligned with higher accuracy.
  • the optical lens 21 is formed by using a molding die in which a concave portion for forming the first lens surface 4 and a concave portion for forming the protrusion 15 are provided in the upper molding die.
  • the protrusion 15 as the alignment mark can be formed at the target position.
  • the projection 15 can be formed at the target position, the alignment of the optical axis can be accurately performed using the projection 15.
  • At least one protrusion 15 is provided on the first end surface 2a, and the number of protrusions 15 is not limited.
  • the shape of the protrusion 15 is not particularly limited.
  • the shape of the protrusion 15 may be a substantially triangular pyramid as in the second embodiment, or may be a columnar shape or a shape whose planar shape is a trapezoid.
  • FIG. 7 is a schematic perspective view showing an optical lens according to the third embodiment of the present invention.
  • the optical lens 31 is provided with first and second groove portions 16 a and 16 b instead of the protrusions.
  • the first groove 16a is provided closer to the first side surface 2e than the first lens surface 4 in the width direction x.
  • the second groove portion 16b is provided closer to the second side surface 2f than the first lens surface 4 in the width direction x.
  • Each of the first and second groove portions 16a and 16b continuously extends from the upper surface 2c to the lower surface 2d in the height direction z.
  • the edge part of the 1st and 2nd groove parts 16a and 16b is provided on the same plane as the upper surface 2c. Other points are the same as in the first embodiment.
  • the first and second groove portions 16a and 16b are provided on the first end surface 2a of the lens body 2. Therefore, by using the first and second groove portions 16a and 16b as alignment marks, the alignment of the optical axis can be performed with higher accuracy.
  • the alignment mark may be a protrusion or a groove.
  • an optical lens can be easily obtained by molding using an upper mold having a convex portion corresponding to the groove portion. Even in that case, since the convex part corresponding to the groove part is provided in the upper mold having the concave part for forming the first lens surface, an optical lens having the groove part provided at the target position can be obtained. . In the obtained optical lens, since the groove portion is provided at the target position, the alignment of the optical axis can be performed with higher accuracy.
  • Optical lens 2 ... Lens bodies 2a, 2b ... First and second end surfaces 2c, 2d ... Upper surface, lower surface 2e, 2f ... First and second side surfaces 3, 15 ... Projections 4, 5 ... first and second lens surfaces 6 to 9 ... first to fourth protrusions 6a to 9a, 15a ... end face 10 ... molding die 11 ... upper molding die 12 ... lower molding die 11a, 12a ... first and first 2 recesses 11b ... 3rd recess 13 ... side part mold 14 ... mother base material 16a, 16b ... 1st, 2nd groove part 17 ... molded product L of mother base material ... cut line

Abstract

Provided is an optical lens which allows for precise alignment of the optical axis. The optical lens 1 comprises: a lens main body 2 having mutually facing first and second end faces 2a, 2b, with the first end face 2a provided with a first lens surface 4 and the second end face 2b provided with a second lens surface; and a projection 3 or a groove provided as an alignment mark in an area where the first lens surface 4 is not provided on the first end face 2a of the lens main body 2.

Description

光学レンズ及びその製造方法Optical lens and manufacturing method thereof
　本発明は、光通信モジュールなどに用いられる光学レンズ及び該光学レンズの製造方法に関する。 The present invention relates to an optical lens used for an optical communication module and the like, and a method for manufacturing the optical lens.
　従来、光通信モジュールにおける光コネクティング素子として、光学レンズが用いられている。このような光学レンズは、例えば、一の光ファイバーと、他の光ファイバーとの間に配置して用いることができ、一の光ファイバーの端面から出射した光を、他の光ファイバーの端面に集光させることができる。この場合、一の光ファイバーに対向するレンズ面と、他の光ファイバーに対向するレンズ面とを有する光学レンズを用いることができる。 Conventionally, an optical lens is used as an optical connecting element in an optical communication module. Such an optical lens can be used, for example, disposed between one optical fiber and another optical fiber, and condenses the light emitted from the end face of one optical fiber on the end face of the other optical fiber. Can do. In this case, an optical lens having a lens surface facing one optical fiber and a lens surface facing another optical fiber can be used.
　下記の特許文献１には、このような光学レンズの一例として、互いに対向する一対の端面に、それぞれ、レンズ面が設けられた光学レンズが開示されている。上記光学レンズの上面には、レンズ部の光軸方向に線上に延びた外部から認識可能な目印が設けられている。また、特許文献１には、このような光学レンズの製造方法として、成形型を用いて、プリフォーム（加熱軟化された光学素子素材）を加圧する方法が記載されている。上記成形型は、上型及び下型と、側面周囲を構成する金型であるスリーブとを備えている。そして、このスリーブを構成する金型に、外部から認識可能な目印を形成するための溝部が形成されている。 Patent Document 1 below discloses an optical lens in which a lens surface is provided on each of a pair of end surfaces facing each other as an example of such an optical lens. On the upper surface of the optical lens, a mark recognizable from the outside extending linearly in the optical axis direction of the lens portion is provided. Patent Document 1 discloses a method for pressurizing a preform (heat-softened optical element material) using a mold as a method for manufacturing such an optical lens. The molding die includes an upper die and a lower die, and a sleeve that is a die that forms the periphery of the side surface. And the groove part for forming the mark which can be recognized from the outside is formed in the metal mold | die which comprises this sleeve.
特許第５２４７０６５号公報Japanese Patent No. 5247065
　しかしながら、特許文献１のような成形型を用いて成形することにより光学レンズを製造する場合、得られた光学レンズにおいて、目印の位置ずれが生じることがあった。そのため、例えば、得られた光学レンズを基板に実装する際に、光軸の位置合わせを精度よく行うことができない場合があった。 However, when an optical lens is manufactured by molding using a molding die as in Patent Document 1, there is a case where a mark is misaligned in the obtained optical lens. Therefore, for example, when the obtained optical lens is mounted on a substrate, the optical axis may not be accurately aligned.
　本発明の目的は、光軸の位置合わせを精度よく行うことを可能とする、光学レンズ及び該光学レンズの製造方法を提供することにある。 An object of the present invention is to provide an optical lens and a method for manufacturing the optical lens, which can accurately align the optical axis.
　本発明に係る光学レンズは、互いに対向し合っている第１及び第２の端面を有し、前記第１の端面に第１のレンズ面が配置されており、前記第２の端面に第２のレンズ面が配置されている、レンズ本体と、前記レンズ本体の前記第１の端面上において、前記第１のレンズ面が配置されていない部分にアライメントマークとして設けられている、突起部又は溝部と、を備えることを特徴とする。 An optical lens according to the present invention has first and second end surfaces facing each other, a first lens surface is disposed on the first end surface, and a second end surface is disposed on the second end surface. A lens body, and a protrusion or groove provided as an alignment mark on the first end surface of the lens body where the first lens surface is not disposed. And.
　本発明に係る光学レンズは、前記第１のレンズ面が、前記第２のレンズ面よりも小さいことが好ましい。 In the optical lens according to the present invention, it is preferable that the first lens surface is smaller than the second lens surface.
　本発明に係る光学レンズは、前記レンズ本体が、前記第１及び第２の端面を結ぶ上面を有し、前記突起部又は溝部が、前記上面まで延びていることが好ましい。 In the optical lens according to the present invention, it is preferable that the lens body has an upper surface connecting the first and second end surfaces, and the protrusion or the groove extends to the upper surface.
　本発明に係る光学レンズの製造方法は、本発明に従って構成される光学レンズの製造方法であって、前記第１のレンズ面を形成するための第１の凹部が設けられている上部成形型と、前記第２のレンズ面を形成するための第２の凹部が設けられている下部成形型とを有し、前記上部成形型における前記第１の凹部が配置されていない部分に、前記突起部又は溝部を形成するための第３の凹部又は凸部がさらに設けられている、成形型を用意する工程と、前記成形型における前記上部成形型及び前記下部成形型の間にマザー基材を配置し、前記成形型により前記マザー基材をプレス成形する工程と、を備える。 An optical lens manufacturing method according to the present invention is an optical lens manufacturing method configured according to the present invention, comprising: an upper mold provided with a first recess for forming the first lens surface; And a lower molding die provided with a second recess for forming the second lens surface, and the protrusion on the portion of the upper molding die where the first recess is not disposed. Alternatively, a step of preparing a molding die further provided with a third concave portion or a convex portion for forming a groove portion, and a mother base material disposed between the upper molding die and the lower molding die in the molding die And a step of press-molding the mother substrate with the mold.
　本発明によれば、光軸の位置合わせを精度よく行うことを可能とする、光学レンズを提供することができる。 According to the present invention, it is possible to provide an optical lens that makes it possible to accurately align the optical axis.
図１は、本発明の第１の実施形態に係る光学レンズを示す模式的斜視図である。FIG. 1 is a schematic perspective view showing an optical lens according to the first embodiment of the present invention. 図２は、本発明の第１の実施形態に係る光学レンズを示す模式的側面図である。FIG. 2 is a schematic side view showing the optical lens according to the first embodiment of the present invention. 図３は、本発明の第１の実施形態に係る光学レンズの製造方法において用いられる成形型を示す模式的正面図である。FIG. 3 is a schematic front view showing a mold used in the method of manufacturing an optical lens according to the first embodiment of the present invention. 図４は、本発明の第１の実施形態に係る光学レンズの製造方法において、マザー基材の位置関係を説明するための模式的正面図である。FIG. 4 is a schematic front view for explaining the positional relationship of the mother base material in the optical lens manufacturing method according to the first embodiment of the present invention. 図５は、本発明の第１の実施形態に係る光学レンズの製造方法において、マザー基材を分断する際におけるカットラインの位置を説明するための模式的側面図である。FIG. 5 is a schematic side view for explaining the position of the cut line when dividing the mother base material in the optical lens manufacturing method according to the first embodiment of the present invention. 図６は、本発明の第２の実施形態に係る光学レンズを示す模式的斜視図である。FIG. 6 is a schematic perspective view showing an optical lens according to the second embodiment of the present invention. 図７は、本発明の第３の実施形態に係る光学レンズを示す模式的斜視図である。FIG. 7 is a schematic perspective view showing an optical lens according to the third embodiment of the present invention. 図８は、比較例の光学レンズの製造方法で用いられる成形型を示す模式的平面図である。FIG. 8 is a schematic plan view showing a mold used in the manufacturing method of the optical lens of the comparative example.
　以下、好ましい実施形態について説明する。但し、以下の実施形態は単なる例示であり、本発明は以下の実施形態に限定されるものではない。また、各図面において、実質的に同一の機能を有する部材は同一の符号で参照する場合がある。 Hereinafter, preferred embodiments will be described. However, the following embodiments are merely examples, and the present invention is not limited to the following embodiments. Moreover, in each drawing, the member which has the substantially the same function may be referred with the same code | symbol.
　（第１の実施形態）
　図１は、本発明の第１の実施形態に係る光学レンズを示す模式的斜視図である。また、図２は、本発明の第１の実施形態に係る光学レンズを示す模式的側面図である。図１及び図２に示すように、光学レンズ１は、レンズ本体２と、突起部３とを有する。 (First embodiment)
FIG. 1 is a schematic perspective view showing an optical lens according to the first embodiment of the present invention. FIG. 2 is a schematic side view showing the optical lens according to the first embodiment of the present invention. As shown in FIGS. 1 and 2, the optical lens 1 includes a lens body 2 and a protrusion 3.
　レンズ本体２は、略直方体状である。レンズ本体２は、第１及び第２の端面２ａ，２ｂと、上面及び下面２ｃ，２ｄと、第１及び第２の側面２ｅ，２ｆとを有する。第１及び第２の端面２ａ，２ｂは、互いに対向し合っている。上面及び下面２ｃ，２ｄ、並びに第１及び第２の側面２ｅ，２ｆは、それぞれ、第１及び第２の端面２ａ，２ｂを結んでいる。また、第１及び第２の側面２ｅ，２ｆは、それぞれ、上面及び下面２ｃ，２ｄを結んでいる。レンズ本体２においては、第１の端面２ａと、第２の端面２ｂとを結ぶ方向が、光軸方向ｙである。なお、光軸方向ｙに直交する方向において、第１及び第２の側面２ｅ，２ｆを結ぶ方向を幅方向ｘとする。また、上面及び下面２ｃ，２ｄを結ぶ方向を高さ方向ｚとする。 The lens body 2 has a substantially rectangular parallelepiped shape. The lens body 2 includes first and second end surfaces 2a and 2b, upper and lower surfaces 2c and 2d, and first and second side surfaces 2e and 2f. The first and second end faces 2a and 2b face each other. The upper and lower surfaces 2c and 2d, and the first and second side surfaces 2e and 2f connect the first and second end surfaces 2a and 2b, respectively. The first and second side surfaces 2e and 2f connect the upper surface and the lower surface 2c and 2d, respectively. In the lens body 2, the direction connecting the first end face 2a and the second end face 2b is the optical axis direction y. In the direction orthogonal to the optical axis direction y, a direction connecting the first and second side surfaces 2e and 2f is defined as a width direction x. A direction connecting the upper surface and the lower surfaces 2c and 2d is a height direction z.
　第１の端面２ａは、第１のレンズ面４を有する。第１のレンズ面４は、平面形状が円状である。また、第１の端面２ａにおいて、第１のレンズ面４は、凸状に湾曲されている。 The first end surface 2 a has a first lens surface 4. The first lens surface 4 has a circular planar shape. In the first end face 2a, the first lens surface 4 is curved in a convex shape.
　他方、第２の端面２ｂは、第２のレンズ面５を有する。第２のレンズ面５も、平面形状が円状である。また、第２の端面２ｂにおいて、第２のレンズ面５は、凸状に湾曲されている。なお、図２に示すように、光学レンズ１では、第２のレンズ面５が、第１のレンズ面４より大きい。もっとも、本発明において、第１及び第２のレンズ面４，５は、同じ大きさであってもよい。また、本発明においては、第１及び第２のレンズ面４，５のうち少なくとも一方が設けられていればよい。 On the other hand, the second end surface 2 b has a second lens surface 5. The second lens surface 5 also has a circular planar shape. In addition, at the second end surface 2b, the second lens surface 5 is curved in a convex shape. As shown in FIG. 2, in the optical lens 1, the second lens surface 5 is larger than the first lens surface 4. However, in the present invention, the first and second lens surfaces 4 and 5 may have the same size. In the present invention, it is sufficient that at least one of the first and second lens surfaces 4 and 5 is provided.
　図１及び図２に示すように、レンズ本体２の第１の端面２ａ上には、突起部３が設けられている。突起部３は、光軸の位置合わせをする際のアライメントマークとして設けられている。なお、突起部３は、第１の端面２ａ上において、第１のレンズ面４が設けられている部分には配置されていない。なお、突起部３は、第２の端面２ｂ上に設けられていてもよいが、本実施形態のように第１のレンズ４の方が第２のレンズ５より小さい場合は、突起部３を形成するためのより一層広いスペースを確保する観点から、第１の端面２ａ上に設けることが好ましい。 As shown in FIGS. 1 and 2, a protrusion 3 is provided on the first end surface 2 a of the lens body 2. The protrusion 3 is provided as an alignment mark when aligning the optical axis. In addition, the protrusion part 3 is not arrange | positioned in the part in which the 1st lens surface 4 is provided on the 1st end surface 2a. The protrusion 3 may be provided on the second end surface 2b. However, when the first lens 4 is smaller than the second lens 5 as in the present embodiment, the protrusion 3 is provided. From the viewpoint of securing a wider space for formation, it is preferable to provide the first end surface 2a.
　本実施形態では、突起部３として、第１～第４の突起部６～９が設けられている。第１～第４の突起部６～９は、それぞれ、略三角柱状の形状を有しており、上面２ｃ側から視たときに、第１の端面２ａからＶ字状に突出している。 In the present embodiment, first to fourth protrusions 6 to 9 are provided as the protrusions 3. Each of the first to fourth protrusions 6 to 9 has a substantially triangular prism shape, and protrudes from the first end surface 2a in a V shape when viewed from the upper surface 2c side.
　第１及び第２の突起部６，７は、幅方向ｘにおいて、第１のレンズ面４より第１の側面２ｅ側に設けられている。第１の突起部６は、高さ方向ｚにおいて、上面２ｃ側に設けられている。より具体的に、第１の突起部６は、高さ方向ｚに沿うように延びており、上面２ｃまで延びている。第１の突起部６の端面６ａは、上面２ｃと同一平面上に位置している。他方、第２の突起部７は、高さ方向ｚにおいて、下面２ｄ側に設けられている。より具体的に、第２の突起部７は、高さ方向ｚに沿うように延びており、下面２ｄまで延びている。第２の突起部７の端面７ａは、下面２ｄと同一平面上に位置している。なお、第１及び第２の突起部６，７は、幅方向ｘにおいて、同じ位置に配置されている。すなわち、第１及び第２の突起部６，７は、上面２ｃ側から視たときに重なるように設けられている。第１及び第２の突起部６，７は、本実施形態のように連なっていなくてもよいが、一体的に連なっていてもよい。すなわち、上面２ｃから下面２ｄに至るように連続的に延びている突起部３が設けられていてもよい。 The first and second protrusions 6 and 7 are provided closer to the first side surface 2e than the first lens surface 4 in the width direction x. The first protrusion 6 is provided on the upper surface 2c side in the height direction z. More specifically, the first protrusion 6 extends along the height direction z and extends to the upper surface 2c. The end surface 6a of the first protrusion 6 is located on the same plane as the upper surface 2c. On the other hand, the second protrusion 7 is provided on the lower surface 2d side in the height direction z. More specifically, the second protrusion 7 extends along the height direction z and extends to the lower surface 2d. The end surface 7a of the second protrusion 7 is located on the same plane as the lower surface 2d. The first and second protrusions 6 and 7 are disposed at the same position in the width direction x. That is, the first and second protrusions 6 and 7 are provided so as to overlap when viewed from the upper surface 2c side. The first and second protrusions 6 and 7 may not be continuous as in the present embodiment, but may be integrally connected. That is, the protrusion part 3 extended continuously from the upper surface 2c to the lower surface 2d may be provided.
　また、第３及び第４の突起部８，９は、第１の端面２ａ上において、第１のレンズ面４より第２の側面２ｆ側に設けられている。第３の突起部８は、高さ方向ｚにおいて、上面２ｃ側に設けられている。より具体的に、第３の突起部８は、高さ方向ｚに沿うように延びており、上面２ｃまで延びている。第３の突起部８の端面８ａは、上面２ｃと同一平面上に位置している。他方、第４の突起部９は、高さ方向ｚにおいて、下面２ｄ側に設けられている。より具体的に、第４の突起部９は、高さ方向ｚに沿うように延びており、下面２ｄまで延びている。第４の突起部９の端面９ａは、下面２ｄと同一平面上に位置している。なお、第３及び第４の突起部８，９は、上記幅方向ｘにおいて、同じ位置に配置されている。すなわち、第３及び第４の突起部８，９は、上面２ｃ側から視たときに重なるように設けられている。第３及び第４の突起部８，９は、本実施形態のように連なっていなくてもよいが、一体的に連なっていてもよい。すなわち、上面２ｃから下面２ｄに至るように連続的に延びている突起部３が設けられていてもよい。 The third and fourth protrusions 8 and 9 are provided on the first end surface 2a on the second side surface 2f side from the first lens surface 4. The third protrusion 8 is provided on the upper surface 2c side in the height direction z. More specifically, the third protrusion 8 extends along the height direction z and extends to the upper surface 2c. The end surface 8a of the third protrusion 8 is located on the same plane as the upper surface 2c. On the other hand, the fourth protrusion 9 is provided on the lower surface 2d side in the height direction z. More specifically, the fourth protrusion 9 extends along the height direction z and extends to the lower surface 2d. The end surface 9a of the fourth protrusion 9 is located on the same plane as the lower surface 2d. The third and fourth protrusions 8 and 9 are disposed at the same position in the width direction x. That is, the 3rd and 4th projection parts 8 and 9 are provided so that it may overlap, when it sees from the upper surface 2c side. The third and fourth protrusions 8 and 9 do not have to be continuous as in this embodiment, but may be continuous. That is, the protrusion part 3 extended continuously from the upper surface 2c to the lower surface 2d may be provided.
　このように、本実施形態の光学レンズ１では、レンズ本体２の第１の端面２ａ上に、突起部３が設けられている。そのため、例えば、光学レンズ１を基板に実装する際に、突起部３をアライメントマークとして光軸の位置合わせを精度よく行うことができる。また、光学レンズ１は、光軸の位置合わせを精度よく行うことができるので、例えば光通信モジュールのコネクティング素子に用いたときに、光を精度よく結合させることができ、光の結合効率を高めることができる。そのため、光学レンズ１は、光通信モジュールの光コネクティング素子に好適に用いることができる。 As described above, in the optical lens 1 of the present embodiment, the protrusion 3 is provided on the first end surface 2 a of the lens body 2. Therefore, for example, when the optical lens 1 is mounted on the substrate, the optical axis can be accurately aligned using the protrusion 3 as an alignment mark. In addition, since the optical lens 1 can accurately align the optical axis, for example, when used in a connecting element of an optical communication module, it is possible to combine light with high accuracy and to increase the light coupling efficiency. be able to. Therefore, the optical lens 1 can be suitably used for an optical connecting element of an optical communication module.
　また、本実施形態のように、第１及び第３の突起部６，８の端面６ａ，８ａが、上面２ｃと同一の平面上に設けられている場合、光軸の位置合わせの際に、より一層容易に突起部を確認することができる。従って、第１及び第３の突起部６，８の端面６ａ，８ａを、上面２ｃと同一の平面上に配置することで、光軸の位置合わせをより一層精度よく行うことができる。 Further, when the end surfaces 6a and 8a of the first and third protrusions 6 and 8 are provided on the same plane as the upper surface 2c as in the present embodiment, when the optical axis is aligned, The protrusion can be confirmed even more easily. Therefore, by arranging the end surfaces 6a and 8a of the first and third protrusions 6 and 8 on the same plane as the upper surface 2c, the optical axes can be aligned with higher accuracy.
　以下、光学レンズ１の製造方法の一例について説明する。 Hereinafter, an example of a method for manufacturing the optical lens 1 will be described.
　製造方法；
　まず、以下に示す成形型を用いて、レンズ本体２を形成する。 Production method;
First, the lens body 2 is formed using a molding die shown below.
　図３は、本発明の第１の実施形態に係る光学レンズの製造方法において用いられる成形型を示す模式的正面図である。図３に示すように、成形型１０は、上部成形型１１（上部金型）、下部成形型１２（下部金型）及び側部成形型１３（側部金型）を有する。 FIG. 3 is a schematic front view showing a mold used in the method of manufacturing an optical lens according to the first embodiment of the present invention. As shown in FIG. 3, the mold 10 includes an upper mold 11 (upper mold), a lower mold 12 (lower mold), and a side mold 13 (side mold).
　上部成形型１１においては、複数の第１の凹部１１ａと、複数の第３の凹部１１ｂとが設けられている。第１の凹部１１ａは、凸状の第１のレンズ面４に対応する形状を有している。第３の凹部１１ｂは、突起部３に対応する形状を有している。本実施形態では、第３の凹部１１ｂは、第１～第４の突起部６～９に対応する形状を有している。 The upper mold 11 is provided with a plurality of first recesses 11a and a plurality of third recesses 11b. The first concave portion 11 a has a shape corresponding to the convex first lens surface 4. The third recess 11 b has a shape corresponding to the protrusion 3. In the present embodiment, the third recess 11b has a shape corresponding to the first to fourth protrusions 6-9.
　下部成形型１２においては、複数の第２の凹部１２ａが設けられている。第２の凹部１２ａは、凸状の第２のレンズ面５に対応する形状を有している。なお、第１及び第２の凹部１１ａ，１２ａは、互いに対向し合うように設けられている。 The lower mold 12 is provided with a plurality of second recesses 12a. The second concave portion 12 a has a shape corresponding to the convex second lens surface 5. The first and second recesses 11a and 12a are provided so as to face each other.
　また、側部成形型１３は、枠状の形状を有している。本実施形態では、突起部３を形成するための凹部が側部成形型１３には設けられていない。 Further, the side mold 13 has a frame shape. In the present embodiment, the side mold 13 is not provided with a recess for forming the protrusion 3.
　本実施形態の製造方法では、この成形型１０を用いて光学レンズ１を形成する。具体的には、まず、図４に示すように、複数の光学レンズ１の母材となるマザー基材１４を、上部成形型１１、下部成形型１２及び側部成形型１３の間に配置する。続いて、上部成形型１１及び下部成形型１２用いて、マザー基材１４をプレスすることにより、マザー基材の成型品１７を成形する。次に、得られたマザー基材の成型品１７を、図５に示すカットラインＬに沿って分断することにより、図１に示すレンズ本体２を得る。 In the manufacturing method of the present embodiment, the optical lens 1 is formed using the mold 10. Specifically, first, as shown in FIG. 4, the mother base material 14 that is the base material of the plurality of optical lenses 1 is disposed between the upper mold 11, the lower mold 12, and the side mold 13. . Subsequently, the mother base material 14 is pressed by using the upper mold 11 and the lower mold 12 to mold the molded product 17 of the mother base. Next, the obtained mother base molding 17 is divided along the cut line L shown in FIG. 5 to obtain the lens body 2 shown in FIG.
　マザー基材の成型品１７の分断方法については、特に限定されないが、例えば、レーザースクライブなどのスクライブや、折り割り、あるいはダイシングにより行うことができる。なかでも、分断面の平滑性をより一層高める観点から、レーザースクライブによりマザー基材１４を分断することが好ましい。 The method for dividing the molded article 17 of the mother base material is not particularly limited, and for example, it can be performed by scribing such as laser scribing, folding, or dicing. Among these, from the viewpoint of further improving the smoothness of the sectional surface, it is preferable to divide the mother base material 14 by laser scribing.
　上記のように本実施形態の製造方法では、上部成形型１１に、第１～第４の突起部６～９を形成するための複数の第３の凹部１１ｂが設けられているので、製造時における第１～第４の突起部６～９の位置ずれが生じ難い。そのため、本実施形態の製造方法で得られた光学レンズ１は、光軸の位置合わせを精度よく行うことができる。これを、以下、より詳細に説明する。 As described above, in the manufacturing method of the present embodiment, the upper mold 11 is provided with the plurality of third recesses 11b for forming the first to fourth protrusions 6 to 9, and therefore, at the time of manufacturing. The first to fourth protrusions 6 to 9 are less likely to be misaligned. Therefore, the optical lens 1 obtained by the manufacturing method of the present embodiment can accurately align the optical axis. This will be described in more detail below.
　図８は、比較例の光学レンズの製造方法で用いられる成形型を示す模式的平面図である。図８に示すように、比較例の光学レンズの製造方法で用いられる成形型１０１は、上部成形型１０２、図示しない下部成形型、及び枠状の側部成形型１０３を有する。成形型１０１において、上部成形型１０２及び下部成形型と、側部成形型１０３は別部材として設けられている。また、アライメントマークとしての突起部を形成するための凹部１０４が側部成形型１０３に設けられている。 FIG. 8 is a schematic plan view showing a mold used in the manufacturing method of the optical lens of the comparative example. As shown in FIG. 8, a mold 101 used in the method for manufacturing an optical lens of the comparative example has an upper mold 102, a lower mold (not shown), and a frame-shaped side mold 103. In the mold 101, the upper mold 102 and the lower mold, and the side mold 103 are provided as separate members. Further, a concave portion 104 for forming a protrusion as an alignment mark is provided in the side portion mold 103.
　図８に示すように、上部成形型１０２を側部成形型１０３の間に挿入する際には稼働に適した隙間が少なくとも数μｍ必要となる。ここで、レンズ面が設けられている上部成形型１０２（及び下部成形型）が、突起部が設けられている側部成形型１０３とは別部材であるため、プレスの際に上部成形型１０２と側部成形型１０３の上記隙間に応じた位置ずれが生じることとなる。そのため、このような成形型１０１を用いて得られた光学レンズでは、目標とする位置からの突起部の位置ずれが生じることがあった。そのため、光軸の位置合わせを精度よく行うことができなかった。 As shown in FIG. 8, when the upper mold 102 is inserted between the side molds 103, a gap suitable for operation is required to be at least several μm. Here, since the upper mold 102 (and the lower mold) provided with the lens surface is a separate member from the side mold 103 provided with the protrusions, the upper mold 102 is subjected to pressing. As a result, a positional shift corresponding to the gap between the side molds 103 occurs. For this reason, in the optical lens obtained using such a mold 101, the protrusions may be displaced from the target position. Therefore, the alignment of the optical axis could not be performed with high accuracy.
　これに対して、本実施形態の製造方法では、第１～第４の突起部６～９を形成するための第３の凹部１１ｂが、第１のレンズ面４を形成するための第１の凹部１１ａと同じ上部成形型１１に設けられているので、プレスの際に上記のような位置ずれが生じ難い。そのため、本実施形態の製造方法で得られた光学レンズ１においては、アライメントマークとしての第１～第４の突起部６～９を目標とする位置に形成することができる。このように、第１～第４の突起部６～９を目標とする位置に形成することができるので、第１～第４の突起部６～９を用いて光軸の位置合わせを精度よく行うことができる。 On the other hand, in the manufacturing method of the present embodiment, the third recess 11b for forming the first to fourth protrusions 6 to 9 has the first recess for forming the first lens surface 4. Since it is provided in the same upper mold 11 as the recess 11a, the above-described positional deviation is unlikely to occur during pressing. Therefore, in the optical lens 1 obtained by the manufacturing method of the present embodiment, the first to fourth protrusions 6 to 9 as alignment marks can be formed at target positions. Thus, since the first to fourth protrusions 6 to 9 can be formed at the target positions, the optical axes are accurately aligned using the first to fourth protrusions 6 to 9. It can be carried out.
　ところで、本実施形態では、第１～第４の突起部６～９が第１のレンズ面４と同じ第１の端面２ａ上に設けられている。そのため、図５に示すように、マザー基材の成型品１７から複数の光学レンズ１を切断する際の目印として突起部３を用いることもできる。従って、本実施形態の製造方法では、ロット間における形状のバラツキが抑制された光学レンズ１を容易に形成することができる。また、第１～第４の突起部６～９が、第１のレンズ面４と同じ第１の端面２ａ上に設けられているので、第１及び第２の側面２ｅ，２ｆが平滑である場合においても、第１及び第２の側面２ｅ，２ｆの位置検出を容易に行うことができる。 In the present embodiment, the first to fourth protrusions 6 to 9 are provided on the same first end surface 2 a as the first lens surface 4. Therefore, as shown in FIG. 5, the protrusion 3 can also be used as a mark when cutting the plurality of optical lenses 1 from the molded article 17 of the mother substrate. Therefore, in the manufacturing method of this embodiment, the optical lens 1 in which the variation in shape between lots is suppressed can be easily formed. Since the first to fourth protrusions 6 to 9 are provided on the same first end surface 2a as the first lens surface 4, the first and second side surfaces 2e and 2f are smooth. Even in this case, the positions of the first and second side surfaces 2e and 2f can be easily detected.
　以下、光学レンズ１を構成する各材料の詳細を説明する。 Hereinafter, details of each material constituting the optical lens 1 will be described.
　レンズ本体；
　レンズ本体を構成する材料としては、特に限定されないが、例えば、ガラス、セラミックス、半導体、又は樹脂等により構成することができる。より一層高い光学特性を得る観点や、より一層高い耐久性を得る観点から、レンズ本体は、ガラスにより構成されていることが好ましい。 Lens body;
Although it does not specifically limit as a material which comprises a lens main body, For example, it can comprise with glass, ceramics, a semiconductor, or resin. From the viewpoint of obtaining higher optical characteristics and obtaining higher durability, the lens body is preferably made of glass.
　ガラスとしては、例えば、ＳｉＯ２－Ｂ２Ｏ３－ＲＯ（ＲはＭｇ、Ｃａ、ＳｒまたはＢａ）系ガラス、ＳｉＯ２－Ｂ２Ｏ３－Ｒ’２Ｏ（Ｒ’はＬｉ、ＮａまたはＫａ）系ガラス、ＳｉＯ２－Ｂ２Ｏ３－ＲＯ－Ｒ’２Ｏ（Ｒ’はＬｉ、ＮａまたはＫａ）系ガラス、ＳｎＯ－Ｐ２Ｏ５系ガラス、ＴｅＯ２系ガラスまたはＢｉ２Ｏ３系ガラス等を用いることができる。 Examples of the glass include SiO 2 —B 2 O 3 —RO (R is Mg, Ca, Sr, or Ba) glass, SiO 2 —B 2 O 3 —R ′ 2 O (R ′ is Li, Na, or Ka). ) Series glass, SiO 2 —B 2 O 3 —RO—R ′ 2 O (R ′ is Li, Na or Ka) series glass, SnO—P 2 O 5 series glass, TeO 2 series glass or Bi 2 O 3 series Glass or the like can be used.
　突起部；
　突起部は、レンズ本体と同じ材料により構成されていてもよいし、別の材料により構成されていてもよい。もっとも、上記のように突起部は、レンズ本体と一体成形することにより形成されることが望ましいため、レンズ本体と同じ材料により構成されていることが好ましい。 protrusion;
The protrusion may be made of the same material as that of the lens body, or may be made of another material. However, as described above, it is preferable that the protrusion is formed by integrally molding with the lens body, and therefore, it is preferable that the protrusion is made of the same material as the lens body.
　突起部を構成する材料としては、特に限定されないが、例えば、ガラス、セラミックス、半導体、又は樹脂等により構成することができる。より一層高い光学特性を得る観点や、より一層高い耐久性を得る観点から、レンズ本体は、ガラスにより構成されていることが好ましい。 The material constituting the protruding portion is not particularly limited, but can be constituted by, for example, glass, ceramics, semiconductor, resin, or the like. From the viewpoint of obtaining higher optical characteristics and obtaining higher durability, the lens body is preferably made of glass.
　ガラスとしては、例えば、ＳｉＯ２－Ｂ２Ｏ３－ＲＯ（ＲはＭｇ、Ｃａ、ＳｒまたはＢａ）系ガラス、ＳｉＯ２－Ｂ２Ｏ３－Ｒ’２Ｏ（Ｒ’はＬｉ、ＮａまたはＫａ）系ガラス、ＳｉＯ２－Ｂ２Ｏ３－ＲＯ－Ｒ’２Ｏ（Ｒ’はＬｉ、ＮａまたはＫａ）系ガラス、ＳｎＯ－Ｐ２Ｏ５系ガラス、ＴｅＯ２系ガラスまたはＢｉ２Ｏ３系ガラス等を用いることができる。 Examples of the glass include SiO 2 —B 2 O 3 —RO (R is Mg, Ca, Sr, or Ba) glass, SiO 2 —B 2 O 3 —R ′ 2 O (R ′ is Li, Na, or Ka). ) Series glass, SiO 2 —B 2 O 3 —RO—R ′ 2 O (R ′ is Li, Na or Ka) series glass, SnO—P 2 O 5 series glass, TeO 2 series glass or Bi 2 O 3 series Glass or the like can be used.
　（第２の実施形態）
　図６は、本発明の第２の実施形態に係る光学レンズを示す模式的斜視図である。 (Second Embodiment)
FIG. 6 is a schematic perspective view showing an optical lens according to the second embodiment of the present invention.
　図６に示すように、第２の実施形態の光学レンズ２１では、形状が略三角錐状である１つの突起部１５が設けられている。突起部１５は、第１の端面２ａにおいて、幅方向ｘの中心に設けられている。また、突起部１５の端面１５ａは、上面２ｃと同一平面上に設けられており、高さ方向ｚにおいて第１のレンズ面４の中心と重なるように設けられている。その他の点は、第１の実施形態と同様である。 As shown in FIG. 6, in the optical lens 21 of the second embodiment, one protrusion 15 having a substantially triangular pyramid shape is provided. The protrusion 15 is provided at the center in the width direction x on the first end surface 2a. Further, the end surface 15a of the protrusion 15 is provided on the same plane as the upper surface 2c, and is provided so as to overlap the center of the first lens surface 4 in the height direction z. Other points are the same as in the first embodiment.
　第２の実施形態の光学レンズ２１においては、レンズ本体２の第１の端面２ａ上に、突起部１５が設けられており、しかも高さ方向ｚにおいて第１のレンズ面４の中心と重なるように設けられている。そのため、突起部１５をアライメントマークとして用いることにより、光軸の位置合わせをより一層精度よく行うことができる。 In the optical lens 21 of the second embodiment, the protrusion 15 is provided on the first end surface 2a of the lens body 2, and overlaps the center of the first lens surface 4 in the height direction z. Is provided. Therefore, by using the projection 15 as an alignment mark, the optical axis can be aligned with higher accuracy.
　また、第２の実施形態においても、第１のレンズ面４を形成するための凹部と突起部１５を形成するための凹部とが上部成形型に設けられた成形型を用いて、光学レンズ２１を製造することができるので、アライメントマークとしての突起部１５を目標とする位置に形成することができる。このように、突起部１５を目標とする位置に形成することができるので、突起部１５を用いて光軸の位置合わせを精度よく行うことができる。 Also in the second embodiment, the optical lens 21 is formed by using a molding die in which a concave portion for forming the first lens surface 4 and a concave portion for forming the protrusion 15 are provided in the upper molding die. Thus, the protrusion 15 as the alignment mark can be formed at the target position. Thus, since the projection 15 can be formed at the target position, the alignment of the optical axis can be accurately performed using the projection 15.
　なお、第２の実施形態で示したように、本発明においては、第１の端面２ａ上に少なくとも１つの突起部１５が設けられていればよく、突起部１５の数は限定されない。 As shown in the second embodiment, in the present invention, it is sufficient that at least one protrusion 15 is provided on the first end surface 2a, and the number of protrusions 15 is not limited.
　また、突起部１５の形状についても特に限定されない。突起部１５の形状は、第２の実施形態のように略三角錐状であってもよく、円柱形状や、平面形状が台形状である形状であってもよい。 Also, the shape of the protrusion 15 is not particularly limited. The shape of the protrusion 15 may be a substantially triangular pyramid as in the second embodiment, or may be a columnar shape or a shape whose planar shape is a trapezoid.
　（第３の実施形態）
　図７は、本発明の第３の実施形態に係る光学レンズを示す模式的斜視図である。図７に示すように、光学レンズ３１においては、突起部の代わりに第１及び第２の溝部１６ａ，１６ｂが設けられている。第１の溝部１６ａは、幅方向ｘにおいて、第１のレンズ面４より第１の側面２ｅ側に設けられている。他方、第２の溝部１６ｂは、幅方向ｘにおいて、第１のレンズ面４より第２の側面２ｆ側に設けられている。第１及び第２の溝部１６ａ，１６ｂは、それぞれ、高さ方向ｚにおいて、上面２ｃから下面２ｄに至るように連続的に延びている。また、第１及び第２の溝部１６ａ，１６ｂの端部は、上面２ｃと同一の平面上に設けられている。その他の点は、第１の実施形態と同様である。 (Third embodiment)
FIG. 7 is a schematic perspective view showing an optical lens according to the third embodiment of the present invention. As shown in FIG. 7, the optical lens 31 is provided with first and second groove portions 16 a and 16 b instead of the protrusions. The first groove 16a is provided closer to the first side surface 2e than the first lens surface 4 in the width direction x. On the other hand, the second groove portion 16b is provided closer to the second side surface 2f than the first lens surface 4 in the width direction x. Each of the first and second groove portions 16a and 16b continuously extends from the upper surface 2c to the lower surface 2d in the height direction z. Moreover, the edge part of the 1st and 2nd groove parts 16a and 16b is provided on the same plane as the upper surface 2c. Other points are the same as in the first embodiment.
　第３の実施形態の光学レンズ３１においては、レンズ本体２の第１の端面２ａに、第１及び第２の溝部１６ａ，１６ｂが設けられている。そのため、第１及び第２の溝部１６ａ，１６ｂをアライメントマークとして用いることにより、光軸の位置合わせをより一層精度よく行うことができる。 In the optical lens 31 of the third embodiment, the first and second groove portions 16a and 16b are provided on the first end surface 2a of the lens body 2. Therefore, by using the first and second groove portions 16a and 16b as alignment marks, the alignment of the optical axis can be performed with higher accuracy.
　第３の実施形態で示したように、本発明において、アライメントマークは、突起部であっても、溝部であってもよい。溝部を形成する場合は、例えば、溝部に対応する凸部を有する上部成形型を用いて成形することにより、容易に光学レンズを得ることができる。その場合においても、第１のレンズ面を形成するための凹部を有する上部成形型に溝部に対応する凸部が設けられるので、目標とする位置に溝部が設けられた光学レンズを得ることができる。得られた光学レンズでは、目標とする位置に溝部が設けられているので、光軸の位置合わせをより一層精度よく行うことができる。 As shown in the third embodiment, in the present invention, the alignment mark may be a protrusion or a groove. In the case of forming the groove portion, for example, an optical lens can be easily obtained by molding using an upper mold having a convex portion corresponding to the groove portion. Even in that case, since the convex part corresponding to the groove part is provided in the upper mold having the concave part for forming the first lens surface, an optical lens having the groove part provided at the target position can be obtained. . In the obtained optical lens, since the groove portion is provided at the target position, the alignment of the optical axis can be performed with higher accuracy.
１，２１，３１…光学レンズ
２…レンズ本体
２ａ，２ｂ…第１，第２の端面
２ｃ，２ｄ…上面，下面
２ｅ，２ｆ…第１，第２の側面
３，１５…突起部
４，５…第１，第２のレンズ面
６～９…第１～第４の突起部
６ａ～９ａ，１５ａ…端面
１０…成形型
１１…上部成形型
１２…下部成形型
１１ａ，１２ａ…第１，第２の凹部
１１ｂ…第３の凹部
１３…側部成形型
１４…マザー基材
１６ａ，１６ｂ…第１，第２の溝部
１７…マザー基材の成形品
Ｌ…カットライン 1, 21, 31 ... Optical lens 2 ... Lens bodies 2a, 2b ... First and second end surfaces 2c, 2d ... Upper surface, lower surface 2e, 2f ... First and second side surfaces 3, 15 ... Projections 4, 5 ... first and second lens surfaces 6 to 9 ... first to fourth protrusions 6a to 9a, 15a ... end face 10 ... molding die 11 ... upper molding die 12 ... lower molding die 11a, 12a ... first and first 2 recesses 11b ... 3rd recess 13 ... side part mold 14 ... mother base material 16a, 16b ... 1st, 2nd groove part 17 ... molded product L of mother base material ... cut line

Claims (4)

  1. 　互いに対向し合っている第１及び第２の端面を有し、前記第１の端面に第１のレンズ面が配置されており、前記第２の端面に第２のレンズ面が配置されている、レンズ本体と、
    　前記レンズ本体の前記第１の端面上において、前記第１のレンズ面が配置されていない部分にアライメントマークとして設けられている、突起部又は溝部と、
    を備える、光学レンズ。     The first and second end surfaces are opposed to each other, the first lens surface is disposed on the first end surface, and the second lens surface is disposed on the second end surface. , The lens body,
    On the first end surface of the lens body, a protrusion or groove provided as an alignment mark in a portion where the first lens surface is not disposed,
    An optical lens comprising:
  2. 　前記第１のレンズ面が、前記第２のレンズ面よりも小さい、請求項１に記載の光学レンズ。 The optical lens according to claim 1, wherein the first lens surface is smaller than the second lens surface.
  3. 　前記レンズ本体が、前記第１及び第２の端面を結ぶ上面を有し、
    　前記突起部又は溝部が、前記上面まで延びている、請求項１又は２に記載の光学レンズ。     The lens body has an upper surface connecting the first and second end faces;
    The optical lens according to claim 1, wherein the protrusion or the groove extends to the upper surface.
  4. 　請求項１～３のいずれか１項に記載の光学レンズの製造方法であって、
    　前記第１のレンズ面を形成するための第１の凹部が設けられている上部成形型と、前記第２のレンズ面を形成するための第２の凹部が設けられている下部成形型とを有し、前記上部成形型における前記第１の凹部が配置されていない部分に、前記突起部又は溝部を形成するための第３の凹部又は凸部がさらに設けられている、成形型を用意する工程と、
    　前記成形型における前記上部成形型及び前記下部成形型の間にマザー基材を配置し、前記成形型により前記マザー基材をプレス成形する工程と、
    を備える、光学レンズの製造方法。     A method for producing an optical lens according to any one of claims 1 to 3,
    An upper mold provided with a first recess for forming the first lens surface and a lower mold provided with a second recess for forming the second lens surface A molding die is prepared, which is further provided with a third recess or projection for forming the protrusion or groove in a portion where the first recess in the upper molding die is not disposed. Process,
    Placing a mother base between the upper mold and the lower mold in the mold, and press-molding the mother base with the mold; and
    An optical lens manufacturing method comprising:
PCT/JP2017/020035 2016-08-09 2017-05-30 Optical lens and method for manufacturing same WO2018029945A1 (en)

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JPS58219503A (en) * 1982-06-15 1983-12-21 Konishiroku Photo Ind Co Ltd Plastic lens
JPS5990808A (en) * 1982-11-16 1984-05-25 Matsushita Electric Ind Co Ltd Plastic lens
JPH01183612A (en) * 1988-01-18 1989-07-21 Canon Inc Optical element and its manufacture
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