Carrier structure of optical module

Abstract

A carrier structure of an optical module comprises a carrier structure body, the carrier structure body is used for installing a transmission lens assembly and an objective lens assembly, the carrier structure body is used for being fixed to a substrate, and an optical blocking structure is arranged on the inner surface of the carrier structure body. The optical blocking structure is arranged to block stray light emitted from the optical emitter to the first photosensitive area of the optical sensor, an avoiding structure is arranged on the optical blocking structure, and the avoiding structure is arranged to enable a predefined part of a light beam emitted by the optical emitter to penetrate through the optical blocking structure towards the second photosensitive area of the optical sensor. The carrier structure and the optical blocking structure of the optical module are arranged in the carrier structure main body, so that the structural complexity of a lens cone in a lens assembly is not increased, the occupied space after the lens cone is assembled is not increased, the size of the carrier structure main body can be effectively reduced, the cost is saved, and the measurement accuracy of the optical module can be stably and reliably improved.

Description

Technical Field

[0001] This utility model relates to the field of structural design technology for optical modules, and in particular to a carrier structure for an optical module. Background Technology

[0002] Some types of optical sensing systems include an optical transmitter that emits a beam of optical radiation toward a target, and an optical receiver that collects and senses the optical radiation reflected from the target. For example, in some depth sensing systems, the transmitter emits a radiation pulse toward the target, and the optical receiver senses the time of flight (TOF) of the pulse, thus measuring the distance to the target. For many sensing applications, including TOF-based depth sensing, the transmitter and receiver are typically packaged together on the same substrate in a compact package.

[0003] Time-of-Flight (ToF) based depth sensing devices almost inevitably experience stray reflections, which are reflected from optical surfaces within the device or otherwise scattered back to the receiver. Generally, such stray reflections are considered noise, and device designers make every effort to eliminate them. On the other hand, some stray reflections are intentionally used to calibrate TOF measurements.

[0004] Chinese patent CN 112526479 A discloses an optical module with a stray light baffle, including a substrate and an optical emitter. The optical emitter is mounted on the substrate and includes an optical emitting electrode and a transmission lens assembly. The optical emitting electrode is configured to emit an optical radiation beam, and the transmission lens assembly is configured to guide the beam toward a target along a transmission axis. An optical receiver is mounted on the substrate together with the optical emitter and includes an optical sensor and an objective lens assembly. The objective lens assembly is configured to focus the optical radiation reflected from the target onto the optical sensor along a receiving axis. The optical baffle is asymmetrically arranged relative to the transmission axis and has an asymmetrical shape. The asymmetrical shape is configured to preferentially block stray light emitted from the optical emitter toward the receiving axis. In this patent, the optical module with a stray light baffle is mainly located on the lens barrel, resulting in a complex lens barrel structure, a large assembly space requirement, and a correspondingly larger housing size, thus increasing cost. Furthermore, it is not conducive to targeted blocking of stray light emitted from the optical emitter in multiple areas. Utility Model Content

[0005] In view of this, the present invention provides a carrier structure for an optical module. The optical blocking structure is set inside the main body of the carrier structure, which does not increase the structural complexity of the lens barrel in the lens assembly or the space occupied after the lens barrel is assembled. This effectively reduces the size of the carrier structure, saves costs, and can selectively block stray light emitted by the optical transmitter in different areas, thereby improving the measurement accuracy of the optical module stably and reliably.

[0006] An optical module carrier structure is disclosed. The optical module includes a transmission lens assembly, an objective lens assembly, a substrate, an optical transmitter, and an optical sensor. The optical transmitter and the optical sensor are respectively disposed on the substrate. The carrier structure includes a carrier structure body for mounting the transmission lens assembly and the objective lens assembly, and for fixing the carrier structure body to the substrate, such that the transmission lens assembly and the objective lens assembly are respectively disposed above the optical transmitter and the optical sensor. An optical blocking structure is provided on the inner surface of the carrier structure body. The optical blocking structure is configured to block stray light emitted from the optical transmitter toward a first photosensitive area of ​​the optical sensor. The optical blocking structure is provided with a clearance structure, which is configured to allow a predefined portion of the light beam emitted by the optical transmitter to pass through the optical blocking structure toward a second photosensitive area of ​​the optical sensor.

[0007] In one embodiment, the optical blocking structure includes a first blocking portion located at the bottom of the carrier structure body corresponding to the position between the optical emitter and the optical sensor, so as to block the light source energy of the optical emitter from being transmitted to the first photosensitive area and the second photosensitive area, and an avoidance structure is provided on the first blocking portion near the second photosensitive area.

[0008] In one embodiment, the carrier structure body is provided with a first mounting hole for mounting a transmission lens assembly, and a first detour structure is provided on the first blocking part near the first mounting hole.

[0009] In one embodiment, the optical blocking structure further includes a second blocking part located on the bottom of the carrier structure body at a position corresponding to the first photosensitive area and the second photosensitive area, so that the first photosensitive area and the second photosensitive area form independent spaces respectively. The bottom of the second blocking part is provided with a buffer to reduce the stress on the optical sensor.

[0010] In one embodiment, the two ends of the second blocking portion are provided with extension portions that extend to the opposite inner sides of the carrier structure body, and the height of the extension portions is higher than that of the second blocking portion. The extension portions are used to block stray light emitted from the optical emitter toward the first photosensitive area.

[0011] In one embodiment, the carrier structure body is provided with a second mounting hole for mounting an objective lens assembly. The optical blocking structure also includes a third blocking portion disposed on the bottom of the carrier structure body. The third blocking portion is connected to the side of the extension near the first photosensitive area. The height of the third blocking portion is the same as the height of the extension. The third blocking portion is located between the second mounting hole and the inner side of the carrier structure body and is parallel to the inner side of the carrier structure body, so as to block the light source energy of the optical emitter from being transmitted to the electronic device on the substrate to generate diffuse reflection to the first photosensitive area.

[0012] In one embodiment, the avoidance structure is provided on the first blocking portion near the optical emitter to avoid interference between the first blocking portion and the electronic devices on the substrate.

[0013] In one embodiment, the carrier structure body is provided with a first mounting hole for mounting a transmission lens assembly. The first blocking part has an arc structure near the first mounting hole, and the clearance structure is a clearance opening that breaks off from the end of the arc structure. The optical blocking structure also includes a second blocking part, which is located on the bottom of the carrier structure body between the first photosensitive area and the second photosensitive area, so that the first photosensitive area and the second photosensitive area form independent spaces respectively. One end of the second blocking part near the clearance structure is vertically connected to the inner side of the carrier structure body, and the other end of the second blocking part away from the clearance structure is provided with a connecting part that is vertically connected to the first blocking part.

[0014] In one embodiment, reinforcement portions are provided on the inner side of the carrier structure body and the side of the optical blocking structure.

[0015] In one embodiment, the carrier structure body is provided with a breathable structure that connects the inside and outside of the carrier structure body, and the position of the breathable structure is set to avoid the area blocked by the optical blocking structure.

[0016] The optical module carrier structure provided by this utility model has an optical blocking structure set inside the main body of the carrier structure. This does not increase the structural complexity of the lens barrel itself in the lens assembly or the space occupied after the lens barrel is assembled, thereby effectively reducing the size of the carrier structure and saving costs. At the optical sensor end, a regional approach is adopted to enhance the intensity of the light source. The first photosensitive area is the light source of the optical receiver end, and the second photosensitive area is the light source of the optical transmitter. A portion of the light source emitted from the internal structure through the transmitter end is received by the second photosensitive area. Even in dark environments, the light source of the optical sensor is not affected. Furthermore, by reasonably setting the optical blocking structure on the main body of the carrier structure, stray light emitted by the optical transmitter can be blocked in a targeted manner in different regions. This improves the stability of the optical module when it is working under different temperature and lighting conditions, ensuring a stable light source and enhancing the accuracy of measurements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The schematic diagram illustrates the split structure of the optical module in an embodiment of this utility model.

[0019] Figure 2 The schematic diagram illustrates the cross-sectional structure of the optical module and the light source transmission path in an embodiment of this utility model.

[0020] Figure 3 The schematic diagram shows the internal top view of the optical module in the first embodiment of this utility model.

[0021] Figure 4 The diagram schematically shows the rear view of the carrier structure of the optical module of the first embodiment of the present invention.

[0022] Figure 5 The schematic diagram shows the top structure of the carrier structure of the optical module of the first embodiment of the present invention.

[0023] Figure 6 The schematic diagram shows the internal structure of the carrier structure of the optical module of the first embodiment of the present invention.

[0024] Figure 7 The schematic diagram shows the internal top view of the optical module in the second embodiment of the present invention.

[0025] Figure 8 The schematic diagram shows the overall structure of the carrier structure of the optical module of the second embodiment of the present invention.

[0026] Figure 9 The schematic diagram shows the internal top view of the optical module in the third embodiment of this utility model.

[0027] Figure 10 The schematic diagram shows the overall structure of the carrier structure of the optical module of the third embodiment of the present invention from a first-view perspective.

[0028] Figure 11 The schematic diagram shows the overall structure of the carrier structure of the optical module of the third embodiment of the present invention from a second perspective. Detailed Implementation

[0029] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set up," "equipped with," "located in," "installed," and "connected," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] The terms “upper,” “inner wall,” “inner side,” “outer side,” “top,” “side,” “bottom,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0033] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0034] First Embodiment

[0035] like Figures 1 to 6As shown, the carrier structure of the optical module in the first embodiment of this utility model includes a transmission lens assembly 101, an objective lens assembly 102, a substrate 103, an optical transmitter 104, and an optical sensor 105. The optical transmitter 104 and the optical sensor 105 are respectively disposed on the substrate 103. The carrier structure includes a carrier structure body 11, which is used to mount the transmission lens assembly 101 and the objective lens assembly 102, and is also used to fix the carrier structure body 103 to the substrate 103, so that the transmission lens assembly 101 and the objective lens assembly 102 are respectively disposed on the substrate 103. Above the optical emitter 104 and the optical sensor 105, on the inner surface of the carrier structure body 11, i.e. the surface facing the substrate 103, an optical blocking structure 12 is provided. The optical blocking structure 12 is configured to block stray light emitted from the optical emitter 104 toward the first photosensitive area 1051 of the optical sensor 105. An avoidance structure 13 is provided on the optical blocking structure 12. The avoidance structure 13 is configured to allow a predefined portion of the light beam emitted by the optical emitter 104 to pass through the optical blocking structure 12 toward the second photosensitive area 1052 of the optical sensor 105.

[0036] According to the carrier structure of the optical module in the first embodiment of this utility model, the main body 11 of the carrier structure can prevent external light sources from entering the interior of the optical module. The optical blocking structure 12 is set on the inner surface of the main body 11 of the carrier structure, which does not increase the structural complexity of the lens barrel itself in the lens assembly 101 or increase the space occupied after the lens barrel is assembled, thereby effectively reducing the size of the carrier structure body 11. The main body of the carrier structure is made by injection molding, which effectively reduces the input of materials, processes and labor, thereby saving costs to a great extent. The intensity of the light source is enhanced by using a segmented form at the optical sensor 105 end. The first photosensitive area 1051 is the light source at the optical receiver end, and the second photosensitive area 1052 is the optical sensor. The light source of the transmitter 104, through a portion of the light source emitted from the internal structure at the emitting end, is received by the second photosensitive area 1052. Even in a dark environment, the light source of the optical sensor 105 is not affected. Furthermore, by reasonably setting the optical blocking structure 12 and the avoidance structure 13 on the carrier structure body 11, the stray light radiation emitted by the optical transmitter 104 to the first photosensitive area 1051 and the second photosensitive area 1052 can be controlled and blocked in a targeted manner in different areas. This increases the reception of light energy from the light source of the optical transmitter 104 to the second photosensitive area 1052, and improves the stability of the optical module when it works under different temperature and lighting conditions, providing a stable light source and enhancing the accuracy of the measurement.

[0037] like Figure 3 , Figure 4 and Figure 6As shown, specifically in this embodiment, the optical blocking structure 12 includes a first blocking portion 121, which is located on the bottom of the carrier structure body 11 at a position corresponding to the optical emitter 104 and the optical sensor 105, to block the light source energy of the optical emitter 104 from being transmitted to the first photosensitive area 1051 and the second photosensitive area 1052. An obstacle avoidance structure 13 is disposed on the first blocking portion 121 near the second photosensitive area 1052. Specifically, in this embodiment, the obstacle avoidance structure 13 is an air-blocking opening. Specifically, the first blocking portion 121 can control and block the direct scattering of the light source energy of the optical emitter 104 to the first photosensitive area 1051 and the second photosensitive area 1052, avoiding excessive interference to the optical module during measurement and reducing measurement accuracy.

[0038] like Figures 3 to 6 As shown, specifically in this embodiment, the carrier structure body 11 is provided with a first mounting hole 14 for mounting the transmission lens assembly 101, and a first detour structure 1211 is provided on the first blocking part 121 near the first mounting hole 14. By setting the first detour structure 1211, the effect of preventing stray light can be improved more comprehensively.

[0039] like Figure 3 , Figure 4 and Figure 6 As shown, specifically, in this embodiment, the optical blocking structure 12 further includes a second blocking portion 122. The second blocking portion 122 is located on the bottom of the carrier structure body 11, corresponding to the position between the first photosensitive area 1051 and the second photosensitive area 1052, so that the first photosensitive area 1051 and the second photosensitive area 1052 respectively form independent spaces. A buffer 15 is provided at the bottom of the second blocking portion 122 to reduce the stress on the chip on the optical sensor 105. The buffer 15 is preferably a silicone pad. Specifically, in this embodiment, the two ends of the second blocking portion 122 are provided with extension portions 123 that extend to the two opposite inner surfaces 1101 and 1102 of the carrier structure body 11, and the height of the extension portions 123 is higher than that of the second blocking portion 122. The extension portions 122 are used to block stray light emitted from the optical emitter 104 toward the first photosensitive area 1052. Specifically, the two ends of the second blocking portion 122 are provided with second detour structures 1221, which can more comprehensively improve the effect of preventing stray light.

[0040] Specifically, the second blocking part 122 separates and blocks the first photosensitive area 1051 and the second photosensitive area 1052 on the chip of the optical sensor 105, dividing the first photosensitive area 1051 and the second photosensitive area 1052 into independent spaces and effectively controlling the energy of the light source, while the extension part 123 can block the emitted and scattered light generated by the optical emitter 104 from interfering with the first photosensitive area 1051 of the optical sensor 105.

[0041] like Figure 3 , Figure 4 and Figure 6 As shown, specifically, in this embodiment, the carrier structure body 11 is provided with a second mounting hole 16 for mounting the objective lens assembly 102. The second mounting hole 16 is provided with a recessed groove 111 around its periphery so that the objective lens assembly 102 can be better fitted and mounted to the carrier structure body 11, reducing the space occupied. The optical blocking structure 12 also includes a third blocking part 124 provided on the bottom of the carrier structure body 11. The third blocking part 124 is connected to the side of the extension 123 near the first photosensitive area 1051. The height of the third blocking part 124 is the same as the height of the extension 123. The third blocking part 124 is located between the second mounting hole 16 and the inner side surface 1101 of the carrier structure body 11 and is parallel to the inner side surface 1101 of the carrier structure body 11, so as to block the light source energy of the optical emitter 104 from being transmitted to the electronic device 106 on the substrate 103 to generate diffuse reflection to the first photosensitive area 1051.

[0042] like Figure 3 , Figure 4 and Figure 6 As shown, specifically in this embodiment, reinforcing portions 17 are provided on the inner side of the carrier structure body 11 and the side of the optical blocking structure 12. The reinforcing portions 17 are uniformly thick reinforcing ribs, and the bottom of the reinforcing rib structure has a chamfered structure to prevent interference between the carrier structure body 11 and electronic devices 106 on the substrate 103 during the fixing and assembly process. Specifically, by adding reinforcing ribs around the perimeter of the carrier structure body 11, the overall strength of the carrier structure can be greatly increased, making it less prone to deformation, thereby improving the measurement accuracy of the optical module.

[0043] like Figure 5 As shown, specifically in this embodiment, the carrier structure body 11 is provided with a breathable structure 18 connecting the inside and outside of the carrier structure body 11. The breathable structure 18 is a vent, and its position is set to avoid the area blocked by the optical blocking structure 12. Specifically, by setting the breathable structure, it is beneficial for the optical module to dissipate heat and cool down through the breathable structure 18 on the carrier structure body during operation, thereby improving the reliability of the optical module.

[0044] Second Embodiment

[0045] like Figure 7 and Figure 8 As shown, in the second embodiment of this utility model, the optical blocking structure 12 includes a first blocking portion 121. The first blocking portion 121 is located on the bottom of the carrier structure body 11, corresponding to the position between the optical emitter 104 and the optical sensor 105, to block the light source energy of the optical emitter 104 from being transmitted to the first photosensitive area 1051 and the second photosensitive area 1052. A clearance structure 13 is disposed on the part of the first blocking portion 121 near the second photosensitive area 1052. Specifically, in this embodiment, the clearance structure 13 is disposed on the part of the first blocking portion 121 near the optical emitter 104 to avoid interference between the first blocking portion 121 and the electronic device 106 on the substrate 103. Specifically, some of the electronic devices 106 on the substrate 103 can be arranged near the optical emitter 104. By applying glue under the electronic device 106, the glue is generally crescent-shaped and partially surrounds the outer periphery of the optical emitter 104, which can effectively block the light source of the optical emitter 104 from reaching the first photosensitive area 1051.

[0046] like Figure 7 and Figure 8 As shown, specifically, in this embodiment, the optical blocking structure 12 further includes a second blocking portion 122. The second blocking portion 122 is located on the bottom of the carrier structure body 11 between the first photosensitive area 1051 and the second photosensitive area 1052, so that the first photosensitive area 1051 and the second photosensitive area 1052 respectively form independent spaces. A buffer member 15 is provided at the bottom of the second blocking portion 122 to reduce the stress on the optical sensor 105. Specifically, in this embodiment, the two ends of the second blocking portion 122 are provided with extension portions 123 that extend to the two opposite inner surfaces 1101 and 1102 of the carrier structure body 11, respectively, and the height of the extension portions 123 is higher than that of the second blocking portion 122. The extension portions 123 are used to block stray light emitted from the optical emitter 104 toward the first photosensitive area 1051.

[0047] Obviously, in the second embodiment of this utility model, the blocking structure 12 in the carrier structure body 11 reduces some of the blocking parts, can effectively block the light source, and reduces the input of materials, thereby effectively reducing costs.

[0048] Third Embodiment

[0049] like Figures 9 to 11As shown, in the third embodiment of the present invention, the optical blocking structure 12 includes a first blocking part 121, which is located on the bottom of the carrier structure body 11 at a position corresponding to the optical emitter 104 and the optical sensor 105, so as to block the light source energy of the optical emitter 104 from being transmitted to the first photosensitive area 1051 and the second photosensitive area 1052. The avoidance structure 13 is provided on the first blocking part 1221 at a position close to the second photosensitive area 1052.

[0050] like Figures 9 to 11 As shown, specifically, in this embodiment, the carrier structure body 11 is provided with a first mounting hole 14 for mounting the transmission lens assembly 101. The position of the first blocking part 121 near the first mounting hole 14 is an arc structure, and the avoidance structure 13 is an avoidance opening that breaks off from the end of the arc structure. The optical blocking structure 12 also includes a second blocking part 122. The second blocking part 122 is located on the bottom of the carrier structure body 11 between the first photosensitive area 1051 and the second photosensitive area 1052, so that the first photosensitive area 1051 and the second photosensitive area 1052 form independent spaces respectively. One end of the second blocking part 122 near the avoidance structure 13 is vertically connected to the inner side surface 1102 of the carrier structure body 11, and the other end of the second blocking part 122 away from the avoidance structure 13 is provided with a connecting part 125 vertically connected to the first blocking part 121.

[0051] like Figure 10 As shown, specifically in this embodiment, the ventilated structure 18 includes two sets, which can greatly improve the heat dissipation and cooling effect of the optical module.

[0052] Obviously, in the third embodiment of this utility model, the blocking structure 12 in the carrier structure body 11 reduces some of the blocking parts, can effectively block the light source, and reduces the input of materials, thereby effectively reducing the cost.

[0053] As can be seen from the above embodiments, the optical module carrier structure provided by this utility model has an optical blocking structure set inside the main body of the carrier structure. This does not increase the structural complexity of the lens barrel itself in the lens assembly or increase the space occupied after the lens barrel is assembled, thereby effectively reducing the size of the carrier structure body, saving costs, and can selectively block stray light emitted by the optical transmitter in different areas, thereby stably and reliably improving the measurement accuracy of the optical module.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A carrier structure of an optical module including a transmission lens assembly, an objective lens assembly, a substrate, an optical transmitter, and an optical sensor, the optical transmitter and the optical sensor being respectively provided on the substrate, characterized by, The carrier structure comprises a carrier structure body for mounting a transmission lens assembly and an objective lens assembly, and the carrier structure body is used for being fixed to the substrate so that the transmission lens assembly and the objective lens assembly are respectively arranged above the optical transmitter and the optical sensor; An optical blocking structure is arranged on the inner surface of the carrier structure body, and the optical blocking structure is arranged to block stray light emitted from the optical transmitter towards the first photosensitive area of the optical sensor; The optical blocking structure is provided with an avoiding structure arranged to make a predefined part of the light beam emitted by the optical transmitter pass through the optical blocking structure towards the second photosensitive area of the optical sensor.

2. The carrier structure of an optical module according to claim 1, wherein The optical blocking structure comprises a first blocking part located on the bottom of the carrier structure body corresponding to the position between the optical transmitter and the optical sensor to block the light source energy of the optical transmitter from being transmitted to the first photosensitive area and the second photosensitive area; The avoiding structure is arranged on the first blocking part close to the second photosensitive area.

3. The carrier structure for optical modules according to claim 2, wherein The carrier structure body is provided with a first mounting hole for mounting the transmission lens assembly; The first blocking part is provided with a first bypass structure close to the first mounting hole.

4. The carrier structure for optical modules according to claim 2 or 3, wherein The optical blocking structure further comprises a second blocking part located on the bottom of the carrier structure body corresponding to the position between the first photosensitive area and the second photosensitive area to make the first photosensitive area and the second photosensitive area form independent spaces respectively; the bottom of the second blocking part is provided with a buffer to reduce the stress on the optical sensor.

5. The carrier structure for optical modules according to claim 4, wherein Both ends of the second blocking part are provided with extension parts extending to the opposite inner sides of the carrier structure body respectively, and the height of the extension part is higher than that of the second blocking part, and the extension part is used to block stray light emitted from the optical transmitter towards the first photosensitive area.

6. The carrier structure for optical modules according to claim 5, wherein The carrier structure body is provided with a second mounting hole for mounting the objective lens assembly; the optical blocking structure further comprises a third blocking part arranged on the bottom of the carrier structure body, which is connected to one side of the extension part close to the first photosensitive area, and the height of the third blocking part is consistent with that of the extension part; The third blocking part is located between the second mounting hole and the inner side of the carrier structure body and is parallel to the inner side of the carrier structure body to block the light source energy of the optical transmitter from being transmitted to the electronic devices on the substrate to produce diffuse reflection to the first photosensitive area.

7. The carrier structure of an optical module according to Claim 2, wherein The avoiding structure is arranged on the first blocking part close to the optical transmitter to avoid interference between the first blocking part and the electronic devices on the substrate.

8. The carrier structure of an optical module according to Claim 2, wherein The carrier structure body is provided with a first mounting hole for mounting the transmission lens assembly; The position close to the first mounting hole on the first blocking part is a circular arc structure, and the avoiding structure is an avoiding opening disconnected from the end of the circular arc structure; The optical blocking structure further comprises a second blocking part, which is located on the bottom of the carrier structure main body and corresponds to the first photosensitive area and the second photosensitive area, so that the first photosensitive area and the second photosensitive area form independent spaces respectively. One end of the second blocking part close to the avoiding structure is connected to the inner side of the carrier structure main body vertically, and the other end of the second blocking part away from the avoiding structure is provided with a connecting part connected to the first blocking part vertically.

9. The carrier structure for optical modules according to any one of claims 1 to 3, wherein, The inner side of the carrier structure main body and the side of the optical blocking structure are both provided with reinforcing parts.

10. The carrier structure for optical modules according to any one of claims 1 to 3, wherein, The carrier structure main body is provided with a gas permeable structure communicating inside and outside of the carrier structure main body, and the position of the gas permeable structure is set to avoid the area blocked by the optical blocking structure.

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