JP2014164252A - Optical module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical module in which a plurality of lenses can be highly accurately aligned and which eliminates the influence of disturbance light and is reduced in module size.SOLUTION: An optical module 1 comprises a resin package body 5 where a light-emitting element 2 or a light-receiving element 3 is sealed, a sleeve 7, and a case 10 having a light shielding property. A recessed part 9 is provided in the package body 5 and a first lens 6 is provided in a position facing the light-emitting element 2 or the light-receiving element 3. Further, a second lens 8 is formed integrally with the sleeve 7 and a taper 14 fitted into the recessed part 9 is provided in the sleeve 7. The package body 5 and the sleeve 7 are incorporated in the case 10, so that the recessed part 9 of the package body 5 and the taper 14 are fitted to each other, to perform fixation in such a state that the optical axes of the first lens 6 and the second lens 8 are aligned with each other.

Description

  The present invention relates to an optical module, and more particularly to a technology related to miniaturization of a receptacle for holding a package containing a light emitting / receiving element.

  Under the circumstances where optical fiber communication is becoming widespread, reliability and cost reduction of an optical transmission module are required. In order to meet the demand, an optical module is known in which an element is sealed in a resin package and a sleeve for fixing an optical fiber is attached to the resin package body. In this optical module, the optical element is connected to an electrode terminal such as a lead frame, and in this state, the optical element is sealed inside the resin package together with a part of the electrode terminal. Although the configuration of the optical module described above is based on the passive alignment method, the passive alignment method can be assembled and mounted in a short time because it is not monitored, but it is required to finish the joint between parts with high accuracy. In addition, the manufacturing cost of parts is high, and high-precision and expensive mounting equipment is also required.

  Therefore, even if there is a slight misalignment between the optical fiber, the lens, and the optical axis, the optical module can be simplified structurally and manufactured so that the optical coupling efficiency does not fluctuate. As a configuration, a configuration in which a plurality of lenses are provided between an optical element and an optical fiber is known. For example, in Patent Document 1, a cylindrical body is provided in a resin package body having translucency, and a first lens is formed integrally with the light emitting element so as to face the light emitting element. Discloses an optical module in which a housing portion for housing a cylindrical body and a second lens are integrally formed. And the optical axis of the 1st lens and the 2nd lens is match | combined by accommodating the cylinder of a resin package main body in the accommodating part of a sleeve. Moreover, the structure which each provides the attachment part which attaches a sleeve to a resin package main body is disclosed by the resin package and the sleeve.

JP 2009-229613 A

  In the optical module of Patent Document 1, since the resin package body and the sleeve are formed using a light-transmitting resin, light leaks during optical communication and there is an influence of disturbance light. However, Patent Document 1 does not give consideration to eliminating this influence. If the optical module is covered with a light-shielding case in order to eliminate the above-described influence, the optical module disclosed in Patent Document 1 already has a structure for attaching the sleeve to the resin package. In addition to this, it is necessary to add a structure for fixing the sleeve and the resin package to the case, and there is a problem that the case has to be large.

  The present invention has been made in view of the above-described problems of the prior art, and in an optical module having a plurality of lenses, an optical module capable of suppressing the module size and improving productivity while eliminating the influence of disturbance light. It is to provide.

  In order to solve the above-described problems, an optical module according to the present invention includes an optical element that emits or receives an optical signal, a plurality of electrode terminals connected to the optical element, and a part of the electrode terminal that is the optical element. A package body sealed together, a sleeve having a cylindrical portion into which an optical fiber for transmitting an optical signal is inserted, a first lens disposed between the optical element and the sleeve, and an inside of the sleeve A second lens provided on the case, a case made of a light-shielding material for housing the package body, the sleeve, the first lens, and the second lens, and the sleeve in the case The package body and the first lens are formed integrally using a light-transmitting material, and the sleeve and the second lens are formed of a light-transmitting material. Use Integrated to form, the package body is accommodated inside the casing, in a state of connecting the sleeve to the package body to secure the sleeve to the case, characterized in that.

  ADVANTAGE OF THE INVENTION According to this invention, in the optical module which has a some lens, the optical module which can suppress module size and can improve productivity can be provided, eliminating the influence of disturbance light.

The perspective view which shows the transmission / reception optical module which concerns on this embodiment 1 is an exploded perspective view showing the resin package main body, the sleeve, and the case in FIG. 1 in an exploded state. Sectional drawing which looked at the transmission part of the transmission / reception optical module from arrow A-A 'direction in sectional position A1 in FIG. Enlarged view of the lens part in FIG. Sectional view of a transmission / reception optical module having a fixing structure using a thread groove Sectional view of a transmission / reception optical module with a metal structure built into the case

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Throughout the drawings, the same components are denoted by the same reference numerals, and redundant description is omitted.

<First embodiment>
The first embodiment includes an optical element that emits or receives an optical signal, a plurality of electrode terminals connected to the optical element, two resin package bodies in which a part of the electrode terminal is sealed together with the optical element, A transmission / reception optical module including two sleeves each having a cylindrical portion into which an optical fiber for transmitting a signal is inserted and a case formed using a light shielding material will be described as an example. Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view showing a transmission / reception optical module according to the present embodiment. FIG. 2 is an exploded perspective view showing the resin package main body, the sleeve, and the case in FIG. 1 in an exploded state. FIG. 3 is a cross-sectional view of the transmission unit of the transmission / reception optical module as seen from the direction of the arrow AA ′ at the cross-sectional position A1 in FIG. 4 is an enlarged view of the lens portion in FIG. In the following, a transmission / reception optical module provided with both a resin package main body in which a light emitting element is sealed and a resin package main body in which a light receiving element is sealed will be described as an example. The present invention can also be applied to a transmission light module having a light receiving element and a reception light module having a resin package body in which a light receiving element is sealed.

  As shown in FIG. 1, the transmission / reception optical module 1 according to the first embodiment mainly includes a resin package body 5-1, a light receiving element 3, and a preamplifier in which a light emitting element 2 and a drive circuit component 11 of the light emitting element 2 are sealed. 12 includes a resin package main body 5-2 in which 12 is sealed, two sleeves 7-1 and 7-2, and a case 10. Then, the resin package body 5-1 and the sleeve 7-1 are arranged to face each other to form a transmission part, and the reception part in which the resin package body 5-2 and the sleeve 7-2 are arranged to face each other is formed. The receiving part and the receiving part are accommodated in a case 10 having a light shielding property.

  As shown in FIG. 2, the resin package main body 5-1 is formed in, for example, a rectangular flat plate shape having a thickness, and the drive circuit among the light emitting element 2, the drive circuit component 11, and the lead frame 4 is formed therein. The end side electrically connected to the component 11 (hereinafter referred to as “base end side”) is sealed. The resin package body 5-1 is formed using a resin material having translucency that transmits an optical signal. Specifically, the resin package body 5-1 is molded by pouring a resin material into the mold in a state where the light emitting element 2 and the like are inserted into a mold prepared in advance.

  The light emitting element 2 includes a light emitting diode, a laser diode, a surface emitting laser, and the like, and emits light. The light emitting element 2 is connected to a lead frame 4 as an electrode terminal via a drive circuit component 11. The lead frame 4 is formed in an elongated linear or plate shape with a conductive metal material, and the base end side of the lead frame 4 is disposed inside the resin package body 5-1 and the base end portion of the lead frame 4. An end portion (hereinafter referred to as “tip portion”) side opposite to the side protrudes outside the resin package body 5-1. Further, a plurality of lead frames 4 are provided in the resin package body 5-1 and extend from the periphery of the light emitting element 2 and the drive circuit component 11 toward the outside of the resin package body 5-1.

  Of the resin package body 5-1, the fitting surface 5 </ b> A that fits with the sleeve 7-1 faces the light emitting portion of the light emitting element 2. For this reason, the optical signal by the light emitting element 2 is output toward the exterior from the fitting surface 5A of the resin package body 5-1. A recess 9 is provided in the fitting surface 5A. The recess 9 is formed to be recessed from the fitting surface 5 </ b> A toward the light emitting element 2. By fitting the sleeve 7-1 into the recess 9, the resin package body 5-1 and the sleeve 7-1 can be easily aligned.

  The first lens 6 is disposed on the fitting surface 5A of the resin package body 5-1. The first lens 6 is disposed opposite to the light emitting element 2 and is disposed between the light emitting element 2 and the sleeve 7-1. The first lens 6 and the recess 9 are integrally molded with the resin package body 5-1 using the same resin material as that of the resin package body 5-1. The first lens 6 has an optical axis extending in the thickness direction of the resin package body 5-1, and the light emitting element 2 is disposed on the optical axis. As shown in FIG. 3, the first lens 6 is formed by a lens protruding from the fitting surface 5A toward the second lens 8 provided in the sleeve 7-1.

  The sleeve 7-1 is attached to the fitting surface 5A of the resin package body 5-1. The sleeve 7-1 includes an insertion hole 13 for inserting an optical fiber, and is formed in a hollow cylindrical shape extending along the optical axis of the first lens 6. A taper 14 that fits into the recess 9 is formed at an end of the sleeve 7-1 that is attached to the fitting surface 5A (hereinafter referred to as “axial base end”). Further, a claw 15 (see FIG. 3) for fixing to the case 10 is provided at the axial base end portion of the sleeve 7-1.

  A second lens 8 is provided on the proximal end side in the sleeve 7-1. The second lens 8 is formed by a lens whose optical axis is disposed along the axial direction of the sleeve 7-1 and protrudes toward both sides of the optical axis. At this time, the optical axis of the second lens 8 coincides with the central axis of the sleeve 7-1, and the core portion D of the optical fiber C is disposed on the optical axis (see FIG. 3). ). The second lens 8 is formed as a mold integrally with the sleeve 7-1 using the same resin material as that of the sleeve 7-1. Since the sleeve 7-2 has the same configuration as that of the sleeve 7-1, a duplicate description is omitted.

  The resin package body 5-2 has the same configuration except that the light emitting element 2 in the resin package body 5-1 is changed to the light receiving element 3 and the drive circuit component 11 is changed to the preamplifier 12. The light receiving element 3 includes a photodiode, a phototransistor, and the like, receives an optical signal, and outputs a detection signal such as a current and a voltage. The light receiving element 3 is connected to a lead frame 4 as an electrode terminal via a preamplifier 12 for amplifying a detection signal. Of the resin package main body 5-2, the fitting surface 5 </ b> A that fits with the sleeve 7-2 faces the light receiving portion of the light receiving element 3. For this reason, the optical signal output from the optical fiber inserted into the sleeve 7-2 is output toward the light receiving element 3 from the fitting surface 5A of the resin package body 5-2.

  The case 10 is formed as a box-shaped body using a material that is elastically deformed, and one surface thereof is formed as an opening. As shown in FIG. 3, a partition wall 19 is provided that divides the internal space of the case 10 into two regions arranged along the optical axes of the first lens 6 and the second lens 8.

  The open side of the case 10 relative to the partition wall 19 is formed as a connector portion 16 that fits with the optical fiber plug 30, and the back side (region far from the opening) of the partition wall 19 is the resin package body. 5-1 and 5-2 are formed as pockets 18 that hold the package body, and the volume thereof is formed so as to be able to hold the package body accommodated by elastic force. The partition wall 19 is provided with two sleeve holes 17 for holding the sleeves 7-1 and 7-2. In FIG. 3, only the connection structure of the transmitting side, that is, the resin package body 5-1 and the sleeve 7-1 is shown. However, the connection structure of the resin package body 5-2 and the sleeve 7-2 is shown in FIG. -1 and the connection structure of the sleeve 7-1, the connection structure of the resin package main body 5-1 and the sleeve 7-1 will be described, and redundant description will be omitted.

  The sleeve hole 17 and the pocket 18 match the optical axis of the first lens 6 and the optical axis of the second lens 8 when the sleeve 7-1 and the resin package body 5-1 are assembled in the case 10. It is formed in the position to do. Further, the sleeve hole 17 and the pocket 18 are formed with dimensions that can be held by the elasticity of the resin material itself so as not to drop off when the sleeve 7-1 and the resin package body 5-1 are assembled. Furthermore, when the sleeve 7-1 is inserted into the sleeve hole 17, the claw 15 of the sleeve 7-1 engages with the surface of the partition wall portion 19 facing the pocket 18, so that the sleeve 7-1 is held in the case 10. The The case 10 is mold-formed using a light-shielding resin material.

  The concave portion 9 of the resin package main body 5-1 and the taper 14 of the sleeve 7-1 are provided at positions where the optical axes of the first lens 6 and the second lens 8 coincide when they are fitted together.

  When assembling the transmission / reception optical module 1, first, the resin package bodies 5-1 and 5-2 are stored in the pockets 18, and then the axial base ends of the sleeves 7-1 and 7-2 are inserted into the sleeve holes 17. insert. At that time, until the taper 14 formed in each of the sleeves 7-1 and 7-2 and the respective concave portions 9 of the resin package bodies 5-1 and 5-2 accommodated in the pocket 18 are fitted. By inserting, the optical axis of the 1st lens 6 and the optical axis of the 2nd lens 8 correspond (refer FIG. 4). Further, the claw 15 provided on the sleeve 7-1 engages with the surface of the partition wall 19 facing the resin package body 5-1, whereby the sleeve 7-1 and the case 10 are fixed. Further, the taper 14 of the sleeve 7-1 fixed to the case 10 is fitted into the recess 9 of the resin package body 5-1, so that the position of the resin package body 5-1 is adjusted in a state where the optical axes are aligned. It has a structure to hold.

  Next, a method for assembling the transmission / reception optical module 1 according to the present embodiment will be described. First, the resin package main bodies 5-1 and 5-2 are accommodated in the pocket 18 of the case 10. Next, the two sleeves 7-1 and 7-2 are inserted into the two sleeve holes 17 and 17 provided in the partition wall 19 of the case 10, respectively. At this time, each of the claws 15 provided on each of the two sleeves 7-1 and 7-2 is engaged with the partition wall 19. The sleeves 7-1 and 7-2 are fixed to the case 10 by the elastic force received from the contact portion with the sleeve hole 17 and the engaging structure of the claw 15 and the partition wall 19. Further, the resin package main bodies 5-1 and 5-2 are connected to the case 10 by fitting the taper 14 of the sleeves 7-1 and 7-2 into the recess 9 of the resin package main bodies 5-1 and 5-2. The positions of the resin package main bodies 5-1 and 5-2 in the case 10 are held via the fixed sleeves 7-1 and 7-2.

  Next, the operation of the transmission / reception optical module 1 will be described. When outputting an optical signal from the transmission / reception optical module 1 to the optical fiber C, that is, when transmitting an optical signal, first, a control signal for driving the light emitting element 2 from the lead frame 4 to the drive circuit component 11 Is entered. The drive circuit component 11 causes the light emitting element 2 to emit light according to this control signal, and generates an optical signal. This optical signal is temporarily collected by the first lens 6 toward the second lens 8. The second lens 8 condenses the temporarily collected optical signal toward the core portion D of the optical fiber C. Thereby, an optical signal is coupled between the light emitting element 2 and the optical fiber C.

  On the other hand, when the transmission / reception optical module 1 receives an optical signal from the optical fiber C, that is, when receiving an optical signal, the optical signal output from the optical fiber C is transmitted by the second lens 8 in the sleeve 7-2. After temporarily condensing, it is incident on the first lens 6 in the resin package body 5-2. The first lens 6 condenses the optical signal toward the light receiving portion of the light receiving element 3. As a result, an optical signal is coupled between the light receiving element 3 and the optical fiber C. The light receiving element 3 generates an electrical signal corresponding to the intensity of the received optical signal and outputs it to the preamplifier 12. The preamplifier 12 amplifies the electric signal and outputs it to the lead frame 4 included in the resin package body 5-2.

  According to the transmission / reception optical module according to the present embodiment, by fixing the two sleeves 7-1 and 7-2 to the case 10, the resin package main bodies 5-1 and 5-2 in the case 10 are also in the case 10. Hold the position. Therefore, the transmission / reception light includes a fixing structure for the sleeve 7-1 and the resin package body 5-1, and a fixing structure for the sleeve 7-2 and the resin package body 5-2, and further has a structure for fixing them in the case 10. Compared with the module, the fixing structure and the fixing operation can be simplified, and the transmission / reception optical module can be downsized. In addition, the volume of the resin package body can be efficiently used as compared with the case where a structure is provided to fix the resin package body and the sleeve to each other.

  In addition, since the case 10 is formed of a light-shielding material and covers the resin package main body and the sleeve, the influence of noise due to ambient light can be eliminated.

  Further, the first lens 6 is formed integrally with each of the resin package bodies 5-1 and 5-2, and the second lens 8 is formed integrally with each of the sleeves 7-1 and 7-2. Thus, when the resin package main bodies 5-1 and 5-2 and the sleeves 7-1 and 7-2 are formed, the first lens 6 and the second lens 8 can be formed together with these. For this reason, for example, a lens attachment process can be omitted and productivity can be increased as compared with a case where a separately formed lens is bonded to a sleeve.

  In addition, since a plurality of lenses, that is, the first lens 6 and the second lens 8 are used on the transmitter side, more light beams are guided to the core portion of the optical fiber than when a plurality of lenses are not used. And optical coupling loss can be reduced.

  In addition, a concave portion 9 is provided on the fitting surface 5A of the resin package main body 5-1, 5-2, and a taper 14 is provided on the sleeves 7-1, 7-2. 6 and the optical axis of the second lens 8 are formed to coincide with each other. Therefore, the optical axis can be adjusted only by incorporating them. Further, by fixing the sleeves 7-1 and 7-2 to the case 10 by the claws 15 provided on the sleeves 7-1 and 7-2, it is possible to maintain a state in which the optical axes coincide with each other. Therefore, an optical signal can be reliably coupled between the optical element and the optical fiber in a state where the first lens 6 and the second lens 8 are aligned with high accuracy.

  In the above embodiment, the resin package main bodies 5-1 and 5-2 are provided with the recess 9 and the sleeves 7-1 and 7-2 are provided with the taper 14. The structure capable of aligning the sleeves 7-1 and 7-2 is not limited to this.

<Second embodiment>
In the second embodiment, a thread groove is used as a fixing structure between the sleeve 7 and the case 10. Hereinafter, the transmission / reception optical module according to the second embodiment will be described with reference to FIG. FIG. 5 is a cross-sectional view of a transmission / reception optical module having a fixing structure using a thread groove. 5 is a cross-sectional view as seen from the direction of the arrow AA ′ at the cross-sectional position A1 in FIG.

  A sleeve side thread groove 7A (hereinafter abbreviated as “thread groove 7A”) is provided on the outer surface of the sleeve 7-1. Similarly, the inner surface of the sleeve hole 17 of the partition wall 19 is provided with a hole-side thread groove 17A (hereinafter abbreviated as “thread groove 17A”) that fits the thread groove 7A. Then, the sleeve 7-1 is fixed to the case 10 by fitting the screw groove 7A of the sleeve 7-1 into the screw groove 17A of the sleeve hole 17. The sleeve 7-2 has the same configuration and is fixed to the case 10.

  When the sleeve 7-1 and the sleeve 7-2 are fixed to the case 10, the first lens 6 and the second lens 8 are adjusted by adjusting the length in which the screw groove 7A and the screw groove 17A are fitted. The distance between the first lens 6 and the second lens 8 can be further improved in accuracy when the light temporarily collected by the first lens 6 is condensed. Furthermore, in order to continue to hold the position finely adjusted as described above, fine adjustment is performed after applying an adhesive using an ultraviolet curable resin to each of the sleeves 7-1 and 7-2, and at a desired position. The position may be fixed by applying ultraviolet rays.

<Third embodiment>
The third embodiment is an embodiment in which a metal structure is incorporated between the resin package body and the sleeve from the viewpoint of enhancing resistance to electromagnetic noise. In the following, a metal plate as a metal structure is added to the transmission / reception optical module according to the first embodiment, and the sleeve is fixed to the metal plate while maintaining the position of the metal plate in the case. Fix the sleeve to the case via a metal plate. Hereinafter, a third embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view of a transmission / reception optical module in which a metal structure is incorporated in a case. FIG. 6 is a cross-sectional view as seen from the direction of the arrow AA ′ at the cross-sectional position A1 in FIG.

  In the transmission / reception optical module 1b shown in FIG. 6, a metal plate 22 is disposed as a metal structure between two resin package bodies 5-1 and 5-2 and two sleeves 7-1 and 7-2 (however, In FIG. 6, the resin package body 5-2 and the sleeve 7-2 are not shown). The metal plate 22 has two sleeve holes 22A for inserting each of the two sleeves. The hole diameter of the sleeve hole 22A is formed to be the minimum value that can penetrate the sleeve 7-1.7-2, that is, the outer diameter of the sleeves 7-1 and 7-2. In FIG. 6, for convenience of explanation, the vicinity of the resin package 5-1 is enlarged, so that only one sleeve 23A is shown on the metal plate 22, but actually, the resin body package 5- A sleeve hole is provided at a position facing the two concave portions 9. Hereinafter, since the fixing structure of the sleeve 7-2 is the same as the fixing structure of the sleeve 7-1, the description thereof is omitted.

  When assembling the transmission / reception optical module 1b, the resin package bodies 5-1 and 5-2 are inserted into the pockets 18 of the case 10, and the metal plate 22 is inserted between the resin package bodies 5-1 and 5-2 and the partition wall portion 19. Deploy. The metal plate 22 is formed with such a size that the position in the case 10 can be held by the elastic force of the case 10. Then, the sleeve 7-1 is inserted into the sleeve hole 17 of the case 10 and the sleeve hole 22A of the metal plate 22. At this time, the claw 15 is elastically deformed so that the axial base end portion of the sleeve 7-1 passes through the sleeve hole 22A, and then engages with the surface of the metal plate 22 facing the resin package body 5-1. Match. This prevents the sleeve 7-1 from falling off the sleeve hole 22A.

  According to this transmission / reception optical module 1b, the electromagnetic noise with respect to the electronic component sealed in the resin package main body can be shielded by the metal plate 22, and the influence of the electromagnetic noise can be reduced. In addition, the positions of the sleeves 7-1 and 7-2 are held by the elastic force from the sleeve hole 7A of the case 10 and the engagement structure with the metal plate 22 whose position is held by the elastic force from the case 10. Is done. Thereby, the optical axes of the first lens 6 and the second lens 8 can be aligned with higher accuracy. In the above description, the metal plate is added to the transmission / reception optical module according to the first embodiment, but the same effect can be obtained by adding a metal plate to the transmission / reception optical module according to the second embodiment.

<Other embodiments>
In the above, as another example of the fixing structure for fixing the sleeve to the case, for example, a fixing structure using only the elastic force of the resin may be used. Further, the sleeves 7-1 and 7-2 may be additionally fixed to the case 10 using an adhesive. Thereby, the stability of the optical axis can be ensured, and stable performance can be maintained even in long-term use. The connection structure between the resin package main body and the sleeve may be a structure in which a concave portion is provided in the sleeve and a convex portion is provided in the resin package main body, and these are fitted. There may be any combination of the above embodiments.

DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Transmission / reception optical module 2 ... Light emitting element 3 ... Light receiving element 4 ... Lead frame 5-1, 5-2 ... Resin package main body 5A ... Fitting surface 6 ... 1st lens 7-1, 7-2 ... Sleeve 7A ... Thread groove 8 ... 2nd lens 9 ... Recess 10 ... Case 11 ... Drive circuit component 12 ... Preamplifier 13 ... Insertion hole 14 ... Taper 15 ... Claw 16 ... Connector part 17 ... Sleeve hole 17A ... Screw groove 18 ... Pocket 19 ... Partition part 22 ... Metal plate 22A ... Sleeve hole 30 ... Optical fiber plug

Claims (8)

An optical element that emits or receives an optical signal, a plurality of electrode terminals connected to the optical element, and a package body in which a part of the electrode terminal is sealed together with the optical element;
A sleeve having a cylindrical portion into which an optical fiber for transmitting an optical signal is inserted;
A first lens disposed between the optical element and the sleeve;
A second lens provided inside the sleeve;
A case formed using a light-shielding material, which accommodates the package body, the sleeve, the first lens, and the second lens;
A fixing structure for fixing the sleeve to the case;
The package body and the first lens are integrally formed using a translucent material,
The sleeve and the second lens are integrally formed using a translucent material,
The package main body is accommodated in the case, and the sleeve is fixed to the case in a state where the sleeve is connected to the package main body.
An optical module characterized by that. A connection structure for connecting the sleeve and the package body in a state in which the optical axes of the first lens and the second lens are aligned;
The optical module according to claim 1. The case is made of a material that is elastically deformed and formed into a box shape having one surface as an opening, and the internal space is aligned along the optical axes of the first lens and the second lens. It has a partition that divides into two regions,
Of the two regions, a region relatively far from the opening is formed as a pocket portion that accommodates the package body, and the volume thereof is formed to a size that can hold the accommodated package body by an elastic force. And
A sleeve hole formed as a hole into which the sleeve is inserted is formed in the partition wall, and the diameter of the hole is formed so as to be able to hold the sleeve inserted into the sleeve hole by an elastic force. ,
The optical module according to claim 1 or 2. A base end portion connected to the package body in the sleeve includes a claw,
The fixing structure is formed as a structure in which the claw engages with the partition wall when the sleeve base hole of the partition wall penetrates the base end of the sleeve.
The optical module according to claim 3. The fixing structure is formed by fixing the sleeve and the partition wall using an adhesive in a state where the sleeve is passed through the sleeve hole of the partition wall.
The optical module according to claim 3. The fixing structure includes a sleeve-side thread groove provided on the outer surface of the sleeve, and a hole-side thread groove that meshes with the sleeve-side thread groove provided on the inner surface of the sleeve hole.
The optical module according to claim 3. A metal structure for reducing electromagnetic noise is further provided between the package body and the sleeve,
The case is formed so as to be able to hold the position of the metal structure,
Fixing the sleeve to the metal structure;
The optical module according to claim 1, wherein the optical module is an optical module. The connection structure is a structure in which a convex portion provided in the sleeve and a concave portion provided in the package body are fitted, or a convex portion provided in the package main body and a concave portion provided in the sleeve are fitted. Structure,
The optical module according to claim 2.