Two-color thermodetector
By setting the positioning insulating substrate and auxiliary conductive connectors on the tube base of the two-color thermometer, the stacking and electrical connection of the two modules in the two-color thermometer is realized, which solves the technical problem of encapsulating the module in a limited space and realizes the compactness and efficient installation of the equipment.
Patent Information
- Application Number
- CN202422315842.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In a limited space, effectively encapsulating two modules in a two-color thermometer is a technical problem.
By providing a positioning insulating substrate and auxiliary conductive connector on the tube base, the laminated arrangement and electrical connection of the first and second photoelectric modules are realized, reducing the arrangement of the leads, thereby realizing the packaging of the module in a smaller space.
This method allows efficient packaging of two modules of the two-color thermometer in a smaller space, improving the compactness of the equipment and installation accuracy and reducing assembly complexity.
Smart Images
Figure CN223037254U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of detection equipment, in particular to a two-color temperature measuring instrument. Background Art
[0002] The two-color thermometer is also called a colorimetric thermometer. The principle of the two-color thermometer is to measure temperature using the ratio of the radiation intensity in two adjacent bands. Specifically, when measuring temperature, the two-color thermometer simultaneously senses the infrared radiation of two different wavelengths emitted by the object, calculates the ratio of the radiation intensity of the two wavelengths of infrared radiation, and determines the temperature of the object based on this.
[0003] The two-color thermometer includes a tube holder and two stacked modules packaged on the tube holder, wherein the modules are bonded to the tube holder via gold wires. The two-color thermometer is relatively small in size, and how to package the two modules in a limited space is a technical problem that needs to be solved urgently in this field. Utility Model Content
[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a two-color temperature measuring instrument.
[0005] The utility model provides a two-color thermometer, which includes a tube holder, a first photoelectric module and a second photoelectric module, wherein the two-color thermometer also includes a positioning insulating substrate and an auxiliary conductive connecting piece, wherein the positioning insulating substrate includes a photoelectric module bearing portion, an electrical connecting piece bearing portion located at one side of the photoelectric module bearing portion, the auxiliary conductive connecting piece is arranged on the electrical connecting piece bearing portion, the positioning insulating substrate is arranged on the tube holder, the first photoelectric module is arranged on the photoelectric module bearing portion, the second photoelectric module is stacked with the first photoelectric module, the second photoelectric module is electrically connected to the auxiliary conductive connecting piece, and the electrical connecting portion of the first photoelectric module is located at a side of the first photoelectric module away from the photoelectric module bearing portion, and the electrical connecting portion of the first photoelectric module exceeds the coverage range of the second photoelectric module.
[0006] Optionally, the height difference between the surface of the first optoelectronic module facing away from the optoelectronic module bearing part and the surface of the electrical connector bearing part facing away from the tube socket does not exceed a set height threshold, a portion of the second optoelectronic module covers the surface of the first optoelectronic module facing away from the optoelectronic module bearing part, and another portion of the second optoelectronic module covers a portion of the electrical connector bearing part.
[0007] Optionally, a surface of the first optoelectronic module facing away from the optoelectronic module carrying portion is flush with a surface of the electrical connector carrying portion facing away from the tube socket.
[0008] Optionally, a transparent optical adhesive layer is provided between the first optoelectronic module and the second optoelectronic module.
[0009] Optionally, the light-sensitive surface of the first optoelectronic module faces away from the optoelectronic module carrier, and the light-sensitive surface of the second optoelectronic module is opposite to the light-sensitive surface of the first optoelectronic module.
[0010] Optionally, the two-color thermometer further includes a plurality of first pins and a plurality of second pins. The first pins penetrate through the socket along the thickness direction, and the second pins penetrate through the socket along the thickness direction. The electrical connection part of the first optoelectronic module is electrically connected to the first pins, and the auxiliary conductive connecting piece is electrically connected to the second pins.
[0011] Optionally, the positioning insulating substrate is disposed within the space defined by the plurality of first pins and the plurality of second pins.
[0012] Optionally, the two-color thermometer further includes a tube cap that covers the socket and together with the socket forms an accommodation space. The first optoelectronic module, the second optoelectronic module, and the positioning insulating substrate are all disposed within the accommodation space, and the portion of the tube cap opposite to the second optoelectronic module is light-transmissive.
[0013] Optionally, the socket includes a central plate and a flange disposed around the central plate. The first optoelectronic module is disposed on the central plate, and the tube cap is connected to the flange.
[0014] Optionally, at least one alignment mark is provided on the surface of the first optoelectronic module facing away from the optoelectronic module carrier.
[0015] In the two-color thermometer provided by the embodiments of the present invention, although the first optoelectronic module and the second optoelectronic module are stacked, by providing a positioning insulating substrate with an electrical connection part carrier on the socket, the conductive part of the second optoelectronic module can be led out to the auxiliary conductive connecting piece on the electrical connection part carrier. Through the electrical connection parts of the first optoelectronic module that are staggered from each other and the auxiliary conductive connecting piece electrically connected to the second optoelectronic module, electrical connection between the first optoelectronic module and the second optoelectronic module and other devices can be achieved. The auxiliary conductive connecting piece is electrically connected to the second optoelectronic module, reducing the setting of leads, thereby allowing the first optoelectronic module and the second optoelectronic module to be disposed in a smaller space. Description of the Drawings
[0016] The present invention will be further described below with reference to the accompanying drawings:
[0017] Figure 1 is a schematic perspective view of an embodiment of the two-color thermometer provided by the present invention;
[0018] Figure 2 is an exploded perspective view of an embodiment of the dual-color thermometer provided by the present utility model;
[0019] Figure 3 is a cross-sectional view of an embodiment of the dual-color thermometer provided by the present utility model.
[0020] Description of the reference numerals
[0021] 100: Tube base 200: First optoelectronic module
[0022] 300: Second optoelectronic module 400: Positioning insulating substrate
[0023] 500: Auxiliary conductive connecting member 210: First pin
[0024] 310: Second pin 410: Optoelectronic module bearing part
[0025] 420: Electrical connection part 600: Transparent optical adhesive layer
[0026] 700: Tube cap 110: Central plate
[0027] 120: Flange Detailed implementation manners
[0028] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the implementation manners, it is intended to explain the present utility model and should not be construed as a limitation to the present utility model.
[0029] As used herein, the phrase "one embodiment" or "example" or "instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the disclosure of the present utility model. The appearances of the phrase "in one embodiment" in various places in the specification do not necessarily refer to the same embodiment.
[0030] The embodiments of the present utility model provide a dual-color thermometer, as Figure 1As shown in the figure, the two-color thermometer includes a base 100, a first optoelectronic module 200, and a second optoelectronic module 300. The two-color thermometer further includes a positioning insulating substrate 400 and an auxiliary conductive connecting member 500. The positioning insulating substrate 400 includes an optoelectronic module bearing portion 410 and an electrical connecting member bearing portion 420 located on one side of the optoelectronic module bearing portion 410. The auxiliary conductive connecting member 500 is disposed on the electrical connecting member bearing portion 420. The positioning insulating substrate 410 is disposed on the base 100. The first optoelectronic module 200 is disposed on the optoelectronic module bearing portion 410. The second optoelectronic module 300 is stacked with the first optoelectronic module 200, and the second optoelectronic module 300 is electrically connected to the auxiliary conductive connecting member 500.
[0031] The electrical connection portion 220 of the first optoelectronic module 200 is located on the side of the first optoelectronic module 200 away from the optoelectronic module bearing portion 410, and the electrical connection portion 220 of the first optoelectronic module 200 extends beyond the coverage of the second optoelectronic module 300.
[0032] In the two-color thermometer provided by the embodiment of the present invention, although the first optoelectronic module 200 and the second optoelectronic module 300 are stacked, by providing the positioning insulating substrate 400 having the electrical connecting member bearing portion 420 on the base 100, the conductive portion of the second optoelectronic module 300 can be led out to the auxiliary conductive connecting member 500 on the electrical connecting member bearing portion 420. Through the electrical connection portion 220 of the first optoelectronic module 200 that is staggered from each other and the auxiliary conductive connecting member 500 electrically connected to the second optoelectronic module 300, electrical connection between the first optoelectronic module 200 and the second optoelectronic module 300 and other devices can be achieved. The auxiliary conductive connecting member 500 is electrically connected to the second optoelectronic module 300, reducing the setting of leads, thereby allowing the first optoelectronic module 200 and the second optoelectronic module 300 to be disposed in a smaller space.
[0033] In the embodiment of the present invention, there is no special limitation on how the first optoelectronic module 200 and the second optoelectronic module 300 are stacked, as long as it can be ensured that the electrical connection portion 220 of the first optoelectronic module 200 is not covered by the second optoelectronic module 300 and the auxiliary conductive connecting member 500 is not covered by the second optoelectronic module 300.
[0034] In the embodiment of the present invention, there is also no special limitation on the specific structure of the positioning insulating substrate 400, as long as it can bear the first optoelectronic module 200 and has sufficient space to set the auxiliary conductive connecting member 500. Optionally, in order to facilitate the setting of the second optoelectronic module 300, the surface of the electrical connecting member bearing portion 420 for setting the auxiliary conductive connecting member 500 protrudes from the surface of the optoelectronic module bearing portion 410 for setting the first optoelectronic module 200. In Figure 3In the embodiment shown, the upper surface of the electrical connector bearing portion 420 protrudes from the upper surface of the optoelectronic module bearing portion 410.
[0035] In Figure 1 In the embodiment shown, the height difference between the surface of the first optoelectronic module 200 facing away from the optoelectronic module bearing portion 410 and the surface of the electrical connector bearing portion 420 facing away from the socket 100 does not exceed a set height threshold, a part of the second optoelectronic module 300 covers the surface of the first optoelectronic module 200 facing away from the optoelectronic module bearing portion 410, and another part of the second optoelectronic module 300 covers a part of the electrical connector bearing portion 420.
[0036] In the embodiment of the present utility model, the "optoelectronic module" can generate corresponding detection signals according to the received reflected light. Further, the "optoelectronic module" can sense the infrared radiation emitted by an object. The first optoelectronic module 200 and the second optoelectronic module 300 can simultaneously sense two different wavelengths of infrared radiation emitted by an object, calculate the ratio of the radiation intensities of the two wavelengths of infrared rays, and determine the temperature of the object accordingly
[0037] Since the height difference between the surface of the first optoelectronic module 200 facing away from the optoelectronic module bearing portion 410 and the surface of the electrical connector bearing portion 420 facing away from the socket 100 does not exceed the set height threshold, damage to the second optoelectronic module 300 can be avoided and the integrity of the second optoelectronic module 300 can be ensured.
[0038] In the embodiment of the present utility model, no special limitation is imposed on the set height threshold. Specifically, the set height threshold can be determined according to the material and thickness of the second optoelectronic module 300.
[0039] Optionally, the surface of the first optoelectronic module 200 facing away from the optoelectronic module bearing portion 410 is flush with the surface of the electrical connector bearing portion 420 facing away from the socket 100.
[0040] In the case where there is a height difference between the surface of the first optoelectronic module 200 facing away from the optoelectronic module bearing portion 410 and the surface of the electrical connector bearing portion 420 facing away from the socket 100, a transparent optical adhesive layer 600 can be provided on the surface of the first optoelectronic module 200 and the surface of the electrical connector bearing portion 420 to achieve flattening, and the second optoelectronic module 300 can be provided on the transparent optical adhesive layer 600.
[0041] In the embodiment of the present utility model, no special limitation is imposed on the thickness and material of the transparent optical adhesive layer 600, as long as the first optoelectronic module 200 and the second optoelectronic module 300 can be bonded together and have sufficient light transmittance.
[0042] Due to the provision of the transparent optical adhesive layer 600, the second optoelectronic module 300 can be supported on the first optoelectronic module 200, eliminating the need for an additional support device for the second optoelectronic module 300. This simplifies the overall structure of the two-color thermometer and reduces the processing difficulty of the two-color thermometer.
[0043] In addition, by providing the transparent optical adhesive layer 600, the optical response of the first optoelectronic module 200 can also be improved.
[0044] In the embodiment of the present utility model, no special limitation is imposed on the orientation of the photosensitive surface of the first optoelectronic module 200 and the orientation of the photosensitive surface of the second optoelectronic module 300. As an optional implementation manner, the photosensitive surface of the first optoelectronic module 200 faces away from the optoelectronic module carrier portion 410, and the photosensitive surface of the second optoelectronic module 300 is opposite to the photosensitive surface of the first optoelectronic module 200. That is to say, in the two-color thermometer provided in the embodiment of the present utility model, the second optoelectronic module 300 is a back-illuminated optoelectronic module, and its photosensitive surface faces the photosensitive surface of the first optoelectronic module 200. That is to say, the two-color thermometer provided in the embodiment of the present utility model is a "flip-chip stacked package structure". Specifically, the positioning insulating substrate 400 is divided into two parts: an optoelectronic module carrier portion 410 and an electrical connector carrier portion 420. An auxiliary conductive connector 500 is provided on the electrical connector carrier portion 420. By means of module flip-chip, the auxiliary conductive connector 500 is electrically connected to the second optoelectronic module 300, reducing the setting of leads, thereby allowing the first optoelectronic module 200 and the second optoelectronic module 300 to be arranged in a smaller space.
[0045] When assembling the two-color thermometer provided in the embodiment of the present utility model, the positioning insulating substrate 400 can be pre-set on the socket 100. When subsequently mounting the first optoelectronic module 200, the positioning insulating substrate 400 can be used as a positioning member for alignment, thus ensuring the accuracy of the position of the first optoelectronic module 200. When mounting the second optoelectronic module 200, components or marks on the first optoelectronic module 200 can be used as positioning members for alignment, ensuring the accuracy of the position of the second optoelectronic module 300.
[0046] As an optional implementation manner, the positioning insulating substrate 400 is in a stepped shape, and the height of the optoelectronic module carrier portion 410 is lower than the height of the electrical connector carrier portion 420.
[0047] In the embodiments of the present utility model, there are no special limitations on how to electrically connect the first optoelectronic module 200 and the second optoelectronic module 300 to other devices. As an alternative embodiment, the two-color thermometer further includes a plurality of first pins 210 and a plurality of second pins 310. The first pins 210 penetrate the base 100 in the thickness direction, and the second pins 310 penetrate the base 100 in the thickness direction. The electrical connection portion 220 of the first optoelectronic module is electrically connected to the first pins 210, and the auxiliary conductive connection member 500 is electrically connected to the second pins 10.
[0048] The first optoelectronic module 200 can be electrically connected to other devices through the first pins 210, and the second optoelectronic module 300 can be electrically connected to other devices through the second pins 310.
[0049] Optionally, the first pins 210 can be electrically connected to the first optoelectronic module 200 by wire bonding to achieve electrical signal connection of the first optoelectronic module 200. Correspondingly, the second pins 320 can be electrically connected to the auxiliary conductive connection member 500 by wire bonding to achieve electrical signal connection of the second optoelectronic module 300.
[0050] It should be noted that the second optoelectronic module 300 should have a certain light transmittance so that light (e.g., infrared light) can pass through the second optoelectronic module 300 and reach the photosensitive surface of the first optoelectronic module 200.
[0051] As an alternative embodiment, the form of the electrical connection portion 220 of the first optoelectronic module 200 can be a pad.
[0052] As an alternative embodiment, the form of the auxiliary conductive connection member 500 electrically connected to the second optoelectronic module 300 can also be a pad.
[0053] In the embodiments of the present utility model, there are no special limitations on how to fix and position the insulating substrate 400. As an alternative embodiment, the first pins 210 and the second pins 310 can be used to position the insulating substrate 400. Specifically, the insulating substrate 400 is disposed within the space defined by the plurality of first pins 210 and the plurality of second pins 310.
[0054] As an alternative embodiment, the two-color thermometer includes two first pins 210 and two second pins 310, and the two first pins 210 and the two second pins 310 are respectively located at the four vertices of a rectangle, defining a rectangular space, and the insulating substrate 400 is located within this rectangular space.
[0055] As an alternative embodiment, the insulating substrate 400 can be fixed to the base 100 by insulating glue, and the insulating substrate can be made of an insulating material such as ceramic material.
[0056] In an embodiment of the present utility model, an electrical connection portion 220 is provided on the first optoelectronic module 200. Through wire bonding, the electrical connection portion 220 can be electrically connected to the first pin 210. In an embodiment of the present utility model, the orientation of the electrical connection portion 220 is the same as that of the auxiliary conductive connecting member 500. That is to say, the electrical connection portion 220 is provided on the surface of the first optoelectronic module 200 facing away from the optoelectronic module carrier portion 410. To facilitate wire bonding, when arranging the second optoelectronic module 300, the electrical connection portion 220 of the first optoelectronic module 200 should be avoided. When setting the height of the electrical connection member carrier portion 420, the height difference between the electrical connection portion 220 and the auxiliary conductive connecting member 500 can be made not to exceed a set height difference threshold, so as to facilitate wire bonding. In an embodiment of the present utility model, the set height difference threshold can be between 10 μm and 20 μm. As an alternative embodiment, the electrical connection portion 220 is flush with the auxiliary conductive connecting member 500. That is to say, the height difference between the electrical connection portion 220 and the auxiliary conductive connecting member 500 is 0.
[0057] In Figure 1 and Figure 2 In the embodiment shown, two electrical connection portions 220 are provided on the first optoelectronic module 200, which are respectively and electrically connected to two first pins 210. Two auxiliary conductive connecting members 500 are provided on the electrical connection member carrier portion 420, which are respectively and electrically connected to two second pins 310.
[0058] As described above, the auxiliary conductive connecting member 500 should be electrically connected to the second optoelectronic module 300. In an embodiment of the present utility model, the auxiliary conductive connecting member 500 can be electrically connected to the second optoelectronic module 300 by using conductive silver paste.
[0059] To achieve the encapsulation of the module and the transmission of infrared light, the two-color thermometer further includes a tube cap 700, which covers the tube base 100 and forms an accommodation space together with the tube base 100. The first optoelectronic module 200, the second optoelectronic module 300, and the positioning insulating substrate 400 are all arranged in the accommodation space. A portion 710 of the tube cap 700 opposite to the second optoelectronic module 300 can transmit light.
[0060] In an embodiment of the present utility model, no special limitation is imposed on the specific structure of the tube base 100. In Figure 1 and Figure 2 In the specific embodiment shown, the tube base 100 includes a central plate 110 and a flange 120 arranged around the central plate 110. The first optoelectronic module 200 is arranged on the central plate 110, and the tube cap 700 is connected to the flange 120.
[0061] To improve the alignment accuracy of the first optoelectronic module 200 and the second optoelectronic module 300, optionally, at least one alignment mark is provided on the surface of the optoelectronic module carrier portion 410 of the first optoelectronic module 200.
[0062] When mounting the second optoelectronic module 300, the alignment mark can be identified first, and then the second optoelectronic module 300 can be mounted.
[0063] In the embodiment of the present invention, there are no special limitations on the form and quantity of the alignment mark, as long as it can be recognized by the mounter. For example, the shape of the alignment mark can be a "cross" shape or other shapes. In the embodiment of the present invention, the alignment mark can be provided on the periphery of the first optoelectronic module 200 as long as it does not affect the light sensing of the second optoelectronic module 300.
[0064] After setting the alignment mark, the positions of the first optoelectronic module 200 and the second optoelectronic module 300 can be unified (i.e., coaxiality), improving the temperature measurement efficiency of the two-color thermometer.
[0065] The following briefly introduces the preparation method of the two-color thermometer provided by the embodiment of the present invention:
[0066] Use insulating glue to paste the positioning insulating substrate at the center of the tube base, and cure the insulating glue;
[0067] Use insulating glue to attach the first optoelectronic module to the optoelectronic module carrier portion of the positioning insulating substrate;
[0068] Use a dispensing machine to drop optical glue on the light sensing surface of the first optoelectronic module, and place solder on the auxiliary conductive connection member of the positioning insulating substrate;
[0069] Attach the second optoelectronic module to the first optoelectronic module in a flip-chip manner, and cure the optical glue;
[0070] Wire bond the first optoelectronic module to the first pin to realize the electrical signal connection of the first optoelectronic module; and, wire bond the auxiliary conductive connection member to the second pin to realize the electrical signal connection of the second optoelectronic module;
[0071] Use a capacitive energy storage to weld the tube cap to complete the encapsulation of the two-color thermometer.
[0072] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.
Claims
1. A two-color thermometer, comprising a tube holder (100), a first photoelectric module (200) and a second photoelectric module (300), characterized in that: The two-color thermometer further comprises a positioning insulating substrate (400) and an auxiliary conductive connecting member (500); the positioning insulating substrate (400) comprises a photoelectric module bearing portion (410) and an electrical connecting member bearing portion (420) located on one side of the photoelectric module bearing portion (410); the auxiliary conductive connecting member (500) is arranged on the electrical connecting member bearing portion (420); the positioning insulating substrate (400) is arranged on the tube seat (100); the first photoelectric module (200) is arranged on the photoelectric module bearing portion (410); the second photoelectric module (300) is stacked with the first photoelectric module (200); the second photoelectric module (300) is electrically connected to the auxiliary conductive connecting member (500); the electrical connecting portion of the first photoelectric module (200) is located on a side of the first photoelectric module (200) away from the photoelectric module bearing portion (410); and the electrical connecting portion (220) of the first photoelectric module (200) exceeds the coverage range of the second photoelectric module (300).
2. The two-color thermometer according to claim 1, characterized in that: The height difference between the surface of the first optoelectronic module (200) facing away from the optoelectronic module bearing part (410) and the surface of the electrical connector bearing part (420) facing away from the tube seat (100) does not exceed a set height threshold, a portion of the second optoelectronic module (300) covers the surface of the first optoelectronic module (200) facing away from the optoelectronic module bearing part (410), and another portion of the second optoelectronic module (300) covers a portion of the electrical connector bearing part (420).
3. The two-color thermometer according to claim 2, characterized in that: The surface of the first photovoltaic module (200) facing away from the photovoltaic module bearing portion (410) is flush with the surface of the electrical connector bearing portion (420) facing away from the tube seat (100).
4. The two-color thermometer according to claim 2, characterized in that: A transparent optical adhesive layer (600) is provided between the first optoelectronic module (200) and the second optoelectronic module (300).
5. The two-color thermometer according to any one of claims 1 to 4, characterized in that: The photosensitive surface of the first photoelectric module (200) faces away from the photoelectric module supporting portion (410), and the photosensitive surface of the second photoelectric module (300) is opposite to the photosensitive surface of the first photoelectric module (200).
6. The two-color thermometer according to any one of claims 1 to 4, characterized in that: The two-color thermometer further comprises a plurality of first pins (210) and a plurality of second pins (310), wherein the first pins (210) penetrate the tube holder (100) along the thickness direction, and the second pins (310) penetrate the tube holder (100) along the thickness direction, the electrical connection portion (220) of the first photoelectric module is electrically connected to the first pins (210), and the auxiliary conductive connection member (500) is electrically connected to the second pins (310).
7. The two-color thermometer according to claim 6, characterized in that: The positioning insulating substrate (400) is arranged in a space defined by a plurality of the first pins (210) and a plurality of the second pins (310).
8. The two-color thermometer according to any one of claims 1 to 4, characterized in that: The two-color thermometer further comprises a tube cap (700), wherein the tube cap (700) is covered on the tube base (100) and forms a receiving space together with the tube base (100); the first photoelectric module (200), the second photoelectric module (300) and the positioning insulating substrate (400) are all arranged in the receiving space; and a portion of the tube cap (700) opposite to the second photoelectric module (300) is capable of transmitting light.
9. The two-color thermometer according to claim 8, characterized in that: The tube base (100) comprises a central plate (110) and a flange (120) arranged around the central plate (110); the first photovoltaic module (200) is arranged on the central plate (110); and the tube cap (700) is connected to the flange (120).
10. The two-color thermometer according to any one of claims 1 to 4, characterized in that: At least one alignment mark is provided on a surface of the first optoelectronic module (200) that is away from the optoelectronic module carrying portion (410).