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WO2019038997A1 - Prisme et module optique - Google Patents

Prisme et module optique Download PDF

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Publication number
WO2019038997A1
WO2019038997A1 PCT/JP2018/017487 JP2018017487W WO2019038997A1 WO 2019038997 A1 WO2019038997 A1 WO 2019038997A1 JP 2018017487 W JP2018017487 W JP 2018017487W WO 2019038997 A1 WO2019038997 A1 WO 2019038997A1
Authority
WO
WIPO (PCT)
Prior art keywords
prism
light
convex lens
optical module
present
Prior art date
Application number
PCT/JP2018/017487
Other languages
English (en)
Japanese (ja)
Inventor
充 富田
Original Assignee
日本電気硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Publication of WO2019038997A1 publication Critical patent/WO2019038997A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/34—Optical coupling means utilising prism or grating
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements

Definitions

  • the present invention relates to a prism for optically coupling between optical elements and an optical module provided with the prism.
  • Patent Document 1 an optical module using a prism that optically couples optical elements is known.
  • An example of such an optical module is disclosed in Patent Document 1 below.
  • a prism is provided at one end of the optical waveguide circuit. The light emitted from the optical waveguide circuit passes through the inside of the prism and is received by the light receiving element.
  • a lens is provided on the exit surface of the prism, and the light is collected by the light receiving element.
  • Patent Document 2 discloses an optical module provided with a prism in which lenses are provided on both of the entrance surface and the exit surface.
  • alignment markers are provided on the prism and the light receiving element, respectively. Then, alignment is performed by detecting the position of the alignment marker by the imaging device and overlapping the alignment marker of the prism and the light receiving element.
  • An object of the present invention is to provide a prism and an optical module using the prism, which can be easily aligned and can be miniaturized.
  • the prism according to the present invention comprises an incident surface on which light is incident, a reflecting surface on which the light incident on the incident surface is reflected, and an emitting surface on which the light reflected on the reflecting surface is emitted.
  • a convex lens is provided, and the convex lens is characterized by being an asymmetric lens.
  • the curvature of the convex lens in the x direction and the curvature in the y direction is preferable that the curvature of the convex lens be different.
  • the prism according to the present invention light is totally reflected at the reflection surface.
  • the prism according to the present invention further includes opposing first and second side surfaces, and the incident surface, the reflecting surface, and the emitting surface respectively correspond to the first and second side surfaces.
  • a plurality of convex lenses are provided in a line in a direction in which the first side surface and the second side surface are connected.
  • a direction connecting the first side surface and the second side surface is the x direction
  • a direction orthogonal to the x direction is the y direction. It is preferable that the curvature of the convex lens in the direction is larger than the curvature of the convex lens in the y direction.
  • An optical module according to the present invention comprises a prism configured according to the present invention, an optical fiber for causing light to enter the prism, and a light receiving element for collecting light emitted from the prism. It is characterized by
  • FIG. 1 is a perspective view showing the appearance of a prism constituting an optical module according to a first embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing the main parts of the optical module according to the first embodiment of the present invention.
  • FIG. 3 is a schematic plan view showing a reflection surface of a prism constituting the optical module according to the first embodiment of the present invention.
  • FIG. 4 is a schematic view showing a state in which light is received by the light receiving element constituting the optical module according to the first embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view showing the main parts of an optical module according to a second embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional view showing the main parts of an optical module according to a third embodiment of the present invention.
  • FIG. 7 is a schematic view showing a state in which light is received by the light receiving element constituting the optical module of the comparative example.
  • FIG. 1 is a perspective view showing the appearance of a prism constituting an optical module according to a first embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing the main parts of the optical module according to the first embodiment of the present invention. 2 is a schematic cross-sectional view showing the main part of the optical module in the direction along the line AA of FIG.
  • the optical module 11 includes an optical fiber 12, a prism 1 and a light receiving element 13.
  • the prism 1 includes an entrance surface 2, a reflection surface 3, an exit surface 4 and an opposing surface 7.
  • the incident surface 2 is a surface on which light is incident.
  • the reflective surface 3 is a surface on which light incident from the incident surface 2 is reflected.
  • the emitting surface 4 is a surface from which the light reflected by the reflecting surface 3 is emitted.
  • the facing surface 7 is a surface facing the incident surface 2, and is connected to the reflecting surface 3 and the outgoing surface 4.
  • light is emitted from the optical fiber 12, and light enters the prism 1 through the incident surface 2.
  • the light entering the prism 1 through the incident surface 2 is reflected by the reflective surface 3.
  • the light reflected by the reflecting surface 3 is emitted to the outside of the prism 1 through the emitting surface 4.
  • the light emitted from the emission surface 4 is received by the light receiving element 13.
  • the prism 1 includes the first side 5 and the second side 6 facing each other.
  • the incident surface 2, the reflecting surface 3, the emitting surface 4, and the facing surface 7 described above connect the first side surface 5 and the second side surface 6.
  • the entrance surface 2 is connected to the reflection surface 3 and the exit surface 4, and connects the first side surface 5 and the second side surface 6.
  • the reflecting surface 3 is connected to the incident surface 2 and the opposing surface 7, and connects the first side surface 5 and the second side surface 6.
  • the exit surface 4 is connected to the entrance surface 2 and the facing surface 7, and connects the first side surface 5 and the second side surface 6.
  • the facing surface 7 is connected to the reflecting surface 3 and the emitting surface 4, and connects the first side surface 5 and the second side surface 6.
  • the reflective surface 3 is provided with a plurality of convex lenses 8.
  • the planar shape of the plurality of convex lenses 8 is elliptical.
  • the planar shape of the plurality of convex lenses 8 may not be elliptical, and the planar shape is not particularly limited.
  • the prism 1 of the present embodiment is a prism lens array.
  • the number of convex lenses 8 in the prism 1 is not particularly limited.
  • the prism 1 may be, for example, a prism configured by one convex lens 8.
  • the light incident on the prism 1 can be reflected by the convex lens 8, and the light can be condensed on the light receiving element 13.
  • FIG. 3 is a schematic plan view showing a reflection surface of a prism constituting the optical module according to the first embodiment of the present invention.
  • each of the plurality of convex lenses 8 is an asymmetrical lens and has a so-called anamorphic aspheric surface. More specifically, the curvature of the convex lens 8 in the x 1 direction shown in FIG. 3, and the curvature of the convex lens 8 in the y 1 direction are different.
  • x 1 direction in the present embodiment is a direction connecting the first side surface 5 and the second side 6 the reflection surface 3.
  • the y 1 direction is a direction orthogonal to the x 1 direction on the reflective surface 3.
  • the curvature of the convex lens 8 in an arbitrary direction and the curvature of the convex lens 8 in the direction orthogonal to the arbitrary direction may be different.
  • the plurality of convex lenses 8 are all configured by asymmetric lenses, but at least one of the plurality of convex lenses 8 may be configured by an asymmetric lens.
  • the convex lens 8 is provided on the reflection surface 3 of the prism 1 as described above. Therefore, the position of the lens 8 can be clearly viewed from the direction other than the light receiving element 13. Therefore, when the prism 1 is mounted, alignment can be performed easily and accurately, and the positional accuracy when mounting the prism 1 can be effectively improved. Further, in the present embodiment, since the position of the convex lens 8 can be clearly viewed, an alignment marker may not be additionally provided to the emission surface 4 or the like. Therefore, in the prism 1 and the light module 11, the number of parts can be reduced.
  • the optical fiber 12 is directly connected to the incident surface 2 of the prism 1.
  • the optical fiber 12 can be brought close to the incident surface 2. Therefore, the optical module 11 can be miniaturized.
  • the convex lens 8 is provided on the reflection surface 3 of the prism 1 and the convex lens 8 is not provided on the emission surface 4, the height of the optical module 11 can be reduced.
  • the optical module 11 can be miniaturized and reduced in height also from this point of view. .
  • the convex lens 8 is configured by an asymmetric lens. Therefore, in the optical module 11, light can be focused on the light receiving element 13 with high accuracy. This will be described in more detail below with reference to FIGS. 4 and 7.
  • FIG. 4 is a schematic view showing a state in which light is received by the light receiving element constituting the optical module according to the first embodiment of the present invention.
  • FIG. 7 is a schematic view showing a state in which light is received by the light receiving element constituting the optical module of the comparative example. Note that FIG. 4 shows a state in which light is received by the light receiving element 13 when the axially asymmetric convex lens 8 in the present embodiment described above is used. Further, FIG. 7 shows a state in which light is received by the light receiving element 13 when an axially symmetrical convex lens is used as a comparative example.
  • the present embodiment uses a convex lens 8 in the axial asymmetry, in the x 2 direction and the y 2 direction, it is possible to control the reflection direction of light independently. Therefore, as shown in FIG. 4, the light can be collected on the light receiving element 13 with high accuracy.
  • the curvature of the convex lens 8 in the x 1 direction is larger than the curvature of the convex lens 8 in the y 1 direction. Therefore, when the dimension in the x 1 direction of the reflecting surface 3 are the same, as compared with the case convex lens 8 is spherical, more can be provided even more convex lens 8. Further, when the number of the convex lens 8 is the same, it is possible to further reduced the size of the x 1 direction of the reflecting surface 3, can be further miniaturized.
  • the light be totally reflected at the reflection surface 3. In this case, light can be condensed on the light receiving element 13 more efficiently.
  • the convex lens 8 is preferably made of glass. In this case, higher optical properties can be obtained, and higher durability can be obtained.
  • SiO 2 -B 2 O 3 -RO (R is Mg, Ca, Sr or Ba) based glass
  • SiO 2 -B 2 O 3 -R ′ 2 O (R ′ is Li, Na or K ) System glass
  • SiO 2 -B 2 O 3 -RO-R ' 2 O (R' is Li, Na or K) system glass
  • SnO-P 2 O 5 system glass TeO 2 system glass or Bi 2 O 3 system Glass or the like
  • FIG. 5 is a schematic cross-sectional view showing an optical module according to a second embodiment of the present invention.
  • the facing surface 7 is not provided.
  • the reflecting surface 3 and the emitting surface 4 are directly connected.
  • the planar shape of the prism 22 is substantially triangular. The other points are the same as in the first embodiment.
  • the convex lens 8 is provided on the reflecting surface 3 and the convex lens 8 is an asymmetric lens. Therefore, when the prism 22 is mounted, alignment can be performed easily and accurately. In addition, since the position of the convex lens 8 can be clearly viewed, it is not necessary to add an alignment marker to the emission surface 4 or the like. Therefore, in the prism 22 and the optical module 21, the number of parts can be reduced. In addition, the optical module 21 can be miniaturized and reduced in height.
  • the prism 22 may not have the facing surface 7, and the reflecting surface 3 and the light emitting surface 4 may be directly connected. In this case, the height of the prism 22 and the optical module 21 can be further reduced.
  • a jig for position adjustment not shown is provided in the case of having the opposing surface 7 as in the first embodiment. It is possible to adjust the position by pressing the prism 1 to a position, etc., and optical axis adjustment at the time of mounting can be performed more easily.
  • FIG. 6 is a schematic cross-sectional view showing an optical module according to a third embodiment of the present invention. As shown in FIG. 6, in the optical module 31, the exit surface 4 of the prism 32 is connected to the light receiving element 13. The other points are the same as in the first embodiment.
  • the convex lens 8 is provided on the reflection surface 3, and the convex lens 8 is the asymmetric convex lens 8. Therefore, when the prism 32 is mounted, alignment can be performed easily and accurately. In addition, since the position of the convex lens 8 can be clearly viewed, it is not necessary to add an alignment mark to the emission surface 4 or the like. Therefore, in the prism 32 and the optical module 31, the number of parts can be reduced. In addition, the optical module 31 can be miniaturized and reduced in height.
  • the exit surface 4 of the prism 32 may be directly connected to the light receiving element 13. In this case, the height of the optical module 31 can be further reduced.
  • Incident surface 3 Reflective surface 4: Emitting surface 5, 6: First and second side surface 7: Opposite surface 8: Convex lens 11, 21, 31: Optical module 12: Optical fiber 13 ...Light receiving element

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Light Receiving Elements (AREA)
  • Led Device Packages (AREA)

Abstract

L'invention concerne un prisme dans lequel un alignement peut être effectué facilement, et une réduction de taille peut être obtenue. Un prisme (1) est caractérisé en ce qu'il comprend : une surface d'incidence (2) à travers laquelle entre la lumière ; une surface réfléchissante (3) sur laquelle est réfléchie la lumière qui est entrée à travers la surface d'incidence (2) ; et une surface de sortie (4) de laquelle sort la lumière qui a été réfléchie par la surface réfléchissante (3). Le prisme est également caractérisé en ce que : la surface réfléchissante (3) comprend une lentille convexe (8) ; et la lentille convexe (8) est une lentille asymétrique.
PCT/JP2018/017487 2017-08-25 2018-05-02 Prisme et module optique WO2019038997A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-161771 2017-08-25
JP2017161771A JP2019040062A (ja) 2017-08-25 2017-08-25 プリズム及び光モジュール

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Publication Number Publication Date
WO2019038997A1 true WO2019038997A1 (fr) 2019-02-28

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JP (1) JP2019040062A (fr)
TW (1) TW201913154A (fr)
WO (1) WO2019038997A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112444897A (zh) * 2019-08-30 2021-03-05 三星电机株式会社 用于光学成像系统的棱镜

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016206415A (ja) * 2015-04-22 2016-12-08 富士通オプティカルコンポーネンツ株式会社 光モジュール及び光ファイバアセンブリ
JP2017090680A (ja) * 2015-11-10 2017-05-25 富士通株式会社 光配線接続構造、及び光配線接続方法
WO2017130586A1 (fr) * 2016-01-28 2017-08-03 ソニー株式会社 Connecteur optique et module de transmission optique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017203793A (ja) * 2016-05-09 2017-11-16 住友電気工業株式会社 電気光変換モジュール

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016206415A (ja) * 2015-04-22 2016-12-08 富士通オプティカルコンポーネンツ株式会社 光モジュール及び光ファイバアセンブリ
JP2017090680A (ja) * 2015-11-10 2017-05-25 富士通株式会社 光配線接続構造、及び光配線接続方法
WO2017130586A1 (fr) * 2016-01-28 2017-08-03 ソニー株式会社 Connecteur optique et module de transmission optique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112444897A (zh) * 2019-08-30 2021-03-05 三星电机株式会社 用于光学成像系统的棱镜

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TW201913154A (zh) 2019-04-01
JP2019040062A (ja) 2019-03-14

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