Carrier structure for optical modules

Abstract

A carrier structure of an optical module 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 a base plate, an optical blocking structure is arranged on an inner surface of the carrier structure body, the optical blocking structure is arranged to block stray light emitted from an optical emitter towards a first photosensitive area of an optical sensor, and an avoiding structure is arranged on the optical blocking structure, the avoiding structure is arranged to make a predefined part of a light beam emitted by the optical emitter pass through the optical blocking structure towards a second photosensitive area of the optical sensor. The carrier structure of the optical module, the optical blocking structure is arranged inside the carrier structure body, without increasing the structural complexity of the lens barrel itself in the transmission lens assembly and increasing the space occupied after the lens barrel is assembled, the size of the carrier structure 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 invention 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. Summary of the Invention

[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 itself in the lens assembly or increase the space occupied after the lens barrel is assembled. This effectively reduces the size of the carrier structure body, 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 invention has an optical blocking structure located 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 used 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 at the transmitter end is received by the second photosensitive area. Even in darker 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 provides a stable light source for the optical module when it operates under different temperature and lighting conditions, thereby enhancing the accuracy of measurements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention 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 the present invention.

[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 the present invention.

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

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

[0023] Figure 6 The diagram schematically illustrates the internal structure of the carrier structure of the optical module according to 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 according to 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 the present invention.

[0027] Figure 10 The schematic diagram shows the overall structure of the carrier structure of the optical module according to the third embodiment of the present invention.

[0028] Figure 11 The schematic diagram illustrates the overall structure of the carrier structure of the optical module according to the third embodiment of the present invention. Detailed Implementation

[0029] The specific embodiments of the present invention 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 the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0030] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "equipped with," "located in," "installed," "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 of the invention is usually placed when in use. They are 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 limiting the invention.

[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 the present invention 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, such 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, an optical blocking structure 12 is provided on the inner surface of the carrier structure body 11, i.e. the surface facing the substrate 103. 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 first embodiment of the optical module carrier structure of the present invention, the carrier structure body 11 can prevent external light sources from entering the optical module. The optical blocking structure 12 is disposed on the inner surface of the carrier structure body 11, 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 carrier structure body is made by injection molding, which effectively reduces the input of materials, processes and labor, thereby greatly saving costs. The intensity of the light source is enhanced by using a segmented approach 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 emitter 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 emitter 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 emitter 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 the present invention, 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 avoidance structure 13 is disposed on the first blocking portion 121 near the second photosensitive area 1052. Specifically, in this embodiment, the avoidance structure 13 is disposed on 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 adhesive under the electronic devices 106, with the adhesive generally crescent-shaped and partially surrounding the outer periphery of the optical emitter 104, the light source of the optical emitter 104 can be effectively blocked 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 the present invention, 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.

[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 121 near 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 the present invention, 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 the present invention has an optical blocking structure located 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 reliably improving the measurement accuracy of the optical module.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention 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 the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A carrier structure for an optical module, the optical module comprising a transmission lens assembly, an objective lens assembly, a substrate, an optical transmitter, and an optical sensor, wherein the optical transmitter and the optical sensor are respectively disposed on the substrate, characterized in that, The carrier structure includes a carrier structure body, which is used to mount a transmission lens assembly and an objective lens assembly, and is also used to fix the carrier structure body to the substrate, such that the transmission lens assembly and the objective lens assembly are respectively positioned 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 emitter toward the 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 emitter to pass through the optical blocking structure toward the second photosensitive area of ​​the optical sensor.

2. The carrier structure of the optical module as described in claim 1, characterized in that, The optical blocking structure includes a first blocking part, which is located on the bottom of the carrier structure body at a position corresponding to 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; The avoidance structure is located on the first blocking part near the second photosensitive area.

3. The carrier structure of the optical module as described in claim 2, characterized in that, The carrier structure body is provided with a first mounting hole, which is used to mount the transmission lens assembly. The first blocking part is provided with a first detour structure near the first mounting hole.

4. The carrier structure of the optical module as described in claim 2 or 3, characterized in that, The optical blocking structure further includes a second blocking part, which is 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.

5. The carrier structure of the optical module as described in claim 4, characterized in that, The second blocking part has extensions at both ends that extend to the opposite inner sides of the carrier structure body, and the height of the extensions is higher than that of the second blocking part. The extensions are used to block stray light emitted from the optical emitter toward the first photosensitive area.

6. The carrier structure of the optical module as described in claim 5, characterized in that, The carrier structure body is provided with a second mounting hole for mounting the objective lens assembly; the optical blocking structure further includes a third blocking part provided on the bottom of the carrier structure body, the third blocking part is connected to the side of the extension near the first photosensitive area, and the height of the third blocking part 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.

7. The carrier structure of the optical module as described in claim 2, characterized in that, The avoidance structure is located on the first blocking part near the optical emitter to avoid interference between the first blocking part and the electronic devices on the substrate.

8. The carrier structure of the optical module as described in claim 2, characterized in that, The carrier structure body is provided with a first mounting hole, which is used to mount the transmission lens assembly. The first blocking part has an arc structure near the first mounting hole, and the avoidance structure is an avoidance opening that breaks off from the end of the arc structure; The optical blocking structure further 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. The second blocking part is vertically connected to the inner side of the carrier structure body at one end near the avoidance structure, and the second blocking part is provided with a connecting part vertically connected to the first blocking part at one end away from the avoidance structure.

9. The carrier structure of the optical module as described in any one of claims 1 to 3, characterized in that, The inner side of the carrier structure and the side of the optical blocking structure are both provided with reinforcing parts.

10. The carrier structure of the optical module as described in any one of claims 1 to 3, characterized in that, 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.

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