Optical module and laser displacement sensor
By setting a reflection structure in the laser displacement sensor, the light reflected by the object to be measured is reflected to the receiving surface, which solves the problem of limited reception range of the receiving element, and achieves a larger measurement range and higher precision measurement.
Patent Information
- Application Number
- CN202422376407.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The existing laser displacement sensors have limited size of the receiving surface of the receiving element, resulting in limited measurement range and cannot effectively receive the light reflected by the object to be measured, especially when the light angle is too large or too small, it cannot be effectively measured.
A reflective structure is provided in the laser displacement sensor, and the reflective surface of the reflective structure is adjacent to the receiving surface of the receiving element, and is used to reflect light that reflects the object to be measured and falls outside the range of the receiving surface to the receiving surface, thereby expanding the receiving range of the receiving element.
By setting up a reflection structure, the measurement range of the laser displacement sensor is increased, and more light reflected by the object to be measured can be received, improving the measurement accuracy and stability.
Smart Images
Figure CN223122167U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sensors, and particularly relates to an optical module and a laser displacement sensor. Background Art
[0002] A laser displacement sensor is a sensor that realizes the measurement of the target distance based on the principle of laser triangulation ranging. It has the remarkable advantages of non-contact, high precision, high speed, and wide application, and is widely used in the field of industrial automation. The laser displacement sensor can accurately measure the position, displacement, etc. of the measured object non-contact, and is mainly used for the measurement of geometric quantities such as the displacement, thickness, vibration, distance, diameter, etc. of the object. In recent years, especially with the development of artificial intelligence, the performance requirements for laser displacement sensors are getting higher and higher.
[0003] A laser displacement sensor generally includes a transmitting element and a receiving element. The light emitted by the transmitting element irradiates on the surface of the object to be measured at a certain angle. The light is reflected by the object to be measured and focused on the receiving element. When the position of the object to be measured changes along the irradiation direction of the light, the angle of the light received by the receiving element will also change accordingly, and the position of the light spot of the light on the receiving element will also move accordingly. The displacement size corresponds to the moving distance of the object to be measured, that is, the measurement range of the laser displacement sensor. However, for the existing laser displacement sensors, due to the limited size of the receiving surface of the receiving element, when the angle of the light reflected by the object to be measured is too large or too small, the receiving element will not receive the light, resulting in a limited measurement range of the laser displacement sensor. Summary of the Utility Model
[0004] The purpose of the embodiments of the present application is to provide an optical module and a laser displacement sensor, aiming to solve the problem of how to increase the measurement range of the laser displacement sensor.
[0005] To achieve the above purpose, the technical solution adopted by the present application is:
[0006] In the first aspect, an optical module is provided for detecting an object to be measured. The optical module includes a module bracket, a transmitting element for emitting light to the object to be measured, a receiving element disposed on the same side of the object to be measured as the transmitting element, and a reflecting structure for reflecting the light. The transmitting element, the receiving element, and the reflecting structure are all disposed on the module bracket. The reflecting surface of the reflecting structure is adjacent to the receiving surface of the receiving element and the reflecting surface of the reflecting structure is disposed at an angle with the receiving surface. The reflecting structure is used to reflect the light that is reflected by the object to be measured and falls outside the range of the receiving surface to the receiving surface for being received by the receiving surface.
[0007] In some embodiments, the reflective structure includes a first reflector, the reflective surface of the first reflector is adjacent to the side of the receiving surface away from the emitting element, and the first reflector is used to reflect the light irradiated to the side of the receiving surface away from the emitting element to the receiving surface; and / or,
[0008] The reflective structure includes a second reflector, a reflective surface of the second reflector is adjacent to the side of the receiving surface close to the emitting element, and the second reflector is used to reflect the light irradiated to the side of the receiving surface close to the emitting element to the receiving surface.
[0009] In some embodiments, the angle formed by the reflecting surface of the first reflector and the receiving surface is in the range of 70° to 90°, and the angle formed by the reflecting surface of the second reflector and the receiving surface is in the range of 100° to 120°.
[0010] In some embodiments, the module bracket is provided with a light outlet and a light inlet spaced apart from each other, the light outlet and the light inlet are arranged on the same side, the emitting element emits the light toward the object to be measured through the light outlet, and the light reflected by the object to be measured is irradiated to the reflective structure through the light inlet.
[0011] In some embodiments, the light outlet is provided with a first window mirror, and the light entrance is provided with a second window mirror. The light emitted by the emitting element passes through the first window mirror and irradiates the object to be measured, and the light reflected by the object to be measured passes through the second window mirror and irradiates the reflective structure.
[0012] In some embodiments, the optical module further includes a receiving lens, which is disposed on the module bracket, and the light reflected by the object to be measured passes through the receiving lens and is focused onto the receiving element.
[0013] In some embodiments, the optical module includes an emitting lens, the light emitted by the emitting element is emitted through the emitting lens, and the emitting lens is used to converge the divergent light beam emitted by the emitting element into a collimated light beam.
[0014] In some embodiments, the optical module further includes an emission aperture, and the light passing through the emission lens is irradiated to the object to be measured through the emission aperture, and the emission aperture is used to limit the beam width of the light.
[0015] In some embodiments, the optical module further includes a controller, which is respectively communicatively connected to the transmitting element and the receiving element, and is used to control the working state of the transmitting element and to receive signals sent by the receiving element.
[0016] In a second aspect, a laser displacement sensor is provided, and the laser displacement sensor includes the above-mentioned optical module.
[0017] In the optical module provided in this application, by providing a reflection structure on the optical path between the receiving element and the object to be measured, the reflecting surface of the reflection structure is adjacent to the receiving surface of the receiving element, and the reflection structure can reflect the light that is reflected by the object to be measured and falls outside the range of the receiving surface of the receiving element to the receiving surface, which is equivalent to expanding the receiving range of the receiving element so that more light reflected by the object to be measured can be received, and thus the measurement range of the laser displacement sensor can be increased. Description of the Drawings
[0018] In order to more clearly illustrate the technical solutions in the embodiments of this application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings in the following descriptions are only some embodiments of this application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.
[0019] Figure 1 is a schematic diagram of the principle of the laser displacement sensor provided by an embodiment of this application;
[0020] Figure 2 is a schematic diagram of the overall structure of the optical module provided by an embodiment of this application;
[0021] Figure 3 is an optical path diagram of the optical module provided by one of the embodiments of this application;
[0022] Figure 4 is a schematic diagram of the structure of the laser displacement sensor provided by an embodiment of this application.
[0023] Among them, the reference numerals in the drawings are as follows:
[0024] 10, module bracket; 11, light outlet; 12, light inlet; 20, transmitting element; 30, receiving element; 31, receiving surface; 40, reflection structure; 41, first mirror; 42, second mirror; 50, transmitting lens; 60, receiving lens; 70, transmitting aperture; 81, first window mirror; 82, second window mirror; 200, object to be measured; 300, light ray. Detailed Embodiments
[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.
[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.
[0028] In the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.
[0029] Please refer to Figures 1 to 4, an embodiment of the present application provides an optical module for detecting a to-be-detected object 200. The optical module includes a module bracket 10, a transmitting element 20 for emitting a light beam 300 to the to-be-detected object 200, a receiving element 30 disposed on the same side of the to-be-detected object 200 as the transmitting element 20, and a reflecting structure 40 for reflecting the light beam 300. The transmitting element 20, the receiving element 30, and the reflecting structure 40 are all disposed on the module bracket 10. The reflecting surface of the reflecting structure 40 is adjacent to the receiving surface 31 of the receiving element 30 and is disposed at an angle to the receiving surface 31. The reflecting structure 40 is configured to reflect the light beam 300 that is reflected by the to-be-detected object 200 and falls outside the range of the receiving surface 31 to the receiving surface 31 for being received by the receiving surface 31.
[0030] Specifically, the receiving element 30 can receive the irradiation of the light beam 300 from the to-be-detected object 200, convert the optical signal into an electrical signal related to the irradiation position of the light beam 300, and output the electrical signal.
[0031] The optical module of the embodiment of the present application can be applied to a laser displacement sensor to measure changes in the position, displacement, etc. of the to-be-detected object 200. As Figure 1 shown, the specific measurement principle is as follows: The light beam 300 emitted by the transmitting element 20 irradiates on the surface of the to-be-detected object 200 at a certain angle. The light beam 300 is reflected by the to-be-detected object 200 and focused on the receiving element 30. When the position of the to-be-detected object 200 changes along the irradiation direction of the light beam 300, the angle of the light beam 300 received by the receiving element 30 will also change accordingly, and the position of the light spot of the light beam 300 on the receiving element 30 will also move accordingly. The magnitude of the displacement corresponds to the moving distance of the to-be-detected object 200. In this way, by calculating the moving amount of the light spot position focused on the receiving element 30, the displacement amount of the to-be-detected object 200 can be obtained.
[0032] A fixing structure can be provided on the module bracket 10 to fix the transmitting element 20, the receiving element 30, and the reflecting structure 40. The transmitting element 20, the receiving element 30, and the reflecting structure 40 can be fixed to the module bracket 10 by connection means such as snap connection or bonding. The module bracket 10 can also be provided with an opening for passing a cable to connect internal optical or electrical devices.
[0033] In the embodiment of the present application, the transmitting element 20, the receiving element 30, and the reflecting structure 40 are installed together, which can overcome the problem that it is difficult to ensure the accuracy and stability of the positions between multiple optical elements, thereby improving the stability of the laser displacement sensor.
[0034] Understandably, the optical module further includes a controller, which is communicatively connected to the transmitting element 20 and the receiving element 30 respectively. The controller is used to control the working state of the transmitting element 20 and to receive the signals sent by the receiving element 30.
[0035] The controller can be a measurement and control circuit with a microprocessor as the core. The controller can control the time when the transmitting element 20 emits the light ray 300, the intensity of the emitted light ray 300, the duration of the emitted light ray 300, etc. After the light ray 300 reflected by the object to be measured 200 is collected by the receiving element 30, the receiving element 30 can send an electrical signal to the controller, and the controller can calculate the moving distance of the object to be measured 200 based on the electrical signal.
[0036] Understandably, as the position of the object to be measured 200 along the irradiation direction of the light ray 300 changes, the angle of the light ray 300 reflected by the object to be measured 200 will also change. Therefore, the light ray 300 reflected by the object to be measured 200 may not only fall on the receiving surface 31 of the receiving element 30, but may also fall outside the range of the receiving surface 31, such as on the left and right sides of the receiving surface 31. At this time, the range of the receiving element 30 for receiving the light ray 300 is limited. By setting the reflection structure 40, the light ray 300 reflected by the object to be measured 200 and falling outside the range of the receiving surface 31 can be reflected to the receiving surface 31.
[0037] In the optical module provided by the present application, by setting the reflection structure 40 on the light ray 300 path between the receiving element 30 and the object to be measured 200, the reflection surface of the reflection structure 40 is adjacent to the receiving surface 31 of the receiving element 30. The reflection structure 40 can reflect the light ray 300 reflected by the object to be measured 200 and falling outside the receiving surface 31 of the receiving element 30 to the receiving surface 31, which is equivalent to expanding the receiving range of the receiving element 30 so as to be able to receive more light rays 300 reflected by the object to be measured 200, and thus can increase the measurement range of the laser displacement sensor.
[0038] In a possible embodiment, as Figure 3 shown, the reflection structure 40 includes a first reflecting mirror 41. The reflection surface of the first reflecting mirror 41 is adjacent to the side of the receiving surface 31 facing away from the transmitting element 20. The first reflecting mirror 41 is used to reflect the light ray 300 irradiated to the side of the receiving surface 31 facing away from the transmitting element 20 to the receiving surface 31, so as to expand the range of the receiving surface 31 for receiving the light ray 300.
[0039] Understandably, assuming that the first mirror 41 is not provided, the measurement range of the laser displacement sensor is 25 mm to 50 mm from the reference plane of the laser displacement sensor housing. At this time, the angle of the reflected light 300 from the object to be measured 200 within 25 mm from the reference plane of the laser displacement sensor housing is relatively large and falls on the side of the receiving surface 31 away from the emitting element 20. By providing the first mirror 41, the light 300 that originally fell on the side of the receiving surface 31 away from the emitting element 20 can be reflected to the receiving surface 31, thereby expanding the range of the receiving surface 31 for receiving the light 300.
[0040] In another possible embodiment, as Figure 3 shown, the reflection structure 40 includes a second mirror 42. The reflecting surface of the second mirror 42 is adjacent to the side of the receiving surface 31 close to the emitting element 20. The second mirror 42 is configured to reflect the light 300 irradiated to the side of the receiving surface 31 close to the emitting element 20 to the receiving surface 31, thereby also expanding the range of the receiving surface 31 for receiving the light 300.
[0041] Understandably, assuming that the second mirror 42 is not provided, the measurement range of the laser displacement sensor is 25 mm to 50 mm from the reference plane of the laser displacement sensor housing. At this time, the angle of the reflected light 300 from the object to be measured 200 outside 50 mm from the reference plane of the laser displacement sensor housing is relatively small and falls on the side of the receiving surface 31 close to the emitting element 20. By providing the second mirror 42, the light 300 that originally fell on the side of the receiving surface 31 close to the emitting element 20 can be reflected to the receiving surface 31, thereby expanding the range of the receiving surface 31 for receiving the light 300.
[0042] Understandably, in yet another possible embodiment, the first mirror 41 and the second mirror 42 can be provided simultaneously. In this way, the light 300 falling on both sides of the receiving surface 31 can be reflected to the receiving surface 31, thereby further expanding the range of the receiving surface 31 for receiving the light 300.
[0043] In some embodiments, the included angle range between the reflecting surface of the first mirror 41 and the receiving surface 31 is 70° to 90°, and the included angle range between the reflecting surface of the second mirror 42 and the receiving surface 31 is 100° to 120°.
[0044] It should be noted that the receiving element 30 can be a CMOS (Complementary Metal-Oxide-Semiconductor) sensor. A CMOS sensor can be composed of several parts such as an image-sensitive unit array, a row driver, a column driver, a timing control logic, an AD converter, a data bus output interface, a control interface, etc. These parts can be integrated on the same silicon chip. The CMOS sensor has the advantage of high pixel density, can capture image details more precisely, and provide clearer and more realistic image effects; and has lower power consumption, can provide longer usage time; the CMOS sensor integrates functions such as image capture, image processing, and image transmission, has a smaller volume and higher reliability, and is convenient for product design and manufacturing.
[0045] In some embodiments, the module bracket 10 is provided with a light outlet 11 and a light inlet 12 that are spaced apart from each other. The light outlet 11 and the light inlet 12 are arranged on the same side. The transmitting element 20 emits light 300 to the object to be measured 200 through the light outlet 11, and the light 300 reflected by the object to be measured 200 irradiates the reflection structure 40 through the light inlet 12.
[0046] It should be noted that the distance between the light outlet 11 and the light inlet 12 is not limited and can be adjusted according to actual needs. The light outlet 11 and the light inlet 12 can be parallel to one side of the module bracket 10. It can be understood that the positional relationship between the light outlet 11 and the light inlet 12 can also adopt other forms, rather than being limited to the forms already mentioned in the above embodiments, as long as it can achieve the function of emitting and receiving light 300.
[0047] The light 300 can be emitted to the object to be measured 200 through the light outlet 11, and the light 300 reflected by the object to be measured 200 can be irradiated to the reflection structure 40 through the light inlet 12. It can be understood that the area of the light outlet 11 can be smaller than the area of the light inlet 12, that is, the area of the light inlet 12 can be larger. Therefore, when the incident angle of the light 300 changes greatly, the light 300 can also irradiate the reflection structure 40 through the light inlet 12.
[0048] In some embodiments, a first window mirror 81 is provided at the light outlet 11, and a second window mirror 82 is provided at the light inlet 12. The light 300 emitted by the transmitting element 20 passes through the first window mirror 81 and irradiates the object to be measured 200, and the light 300 reflected by the object to be measured 200 passes through the second window mirror 82 and irradiates the reflection structure 40.
[0049] The first window mirror 81 and the second window mirror 82 can allow the light 300 to pass through better, and at the same time, the first window mirror 81 and the second window mirror 82 provided on the outer shell surface of the module bracket 10 can play a role in dust prevention and protection.
[0050] In addition, the first window mirror 81 is placed at an angle relative to the outer shell surface of the module bracket 10. This setting is to prevent stray light from being generated between the first window mirror 81 and the emitting element 20.
[0051] In some embodiments, the optical module further includes a receiving lens 60. The receiving lens 60 is disposed on the module bracket 10. The light 300 reflected by the object to be measured 200 is focused on the receiving element 30 after passing through the receiving lens 60. The receiving lens 60 can enable the light spots reflected from different positions of the object to be measured 200 within the measurement range to be focused on the receiving element 30.
[0052] In some embodiments, the optical module further includes a transmitting lens 50. The light 300 emitted by the emitting element 20 is emitted after passing through the transmitting lens 50. The transmitting lens 50 is used to converge the divergent light beam emitted by the laser into a collimated light beam, thereby improving the measurement accuracy.
[0053] Specifically, the emitting element 20 is a semiconductor laser. Compared with other types of lasers, semiconductor lasers are smaller, lighter, with a smaller volume and a lighter weight. This makes them suitable for integration into various devices and systems. Moreover, semiconductor lasers have high stability, relatively stable output laser frequency and power, and a long service life, capable of continuous operation for thousands of hours or even longer, which can reduce the maintenance and replacement costs of the device. It can be understood that the above-mentioned emitting element 20 can also adopt other forms, not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of emitting the light 300.
[0054] In some embodiments, the optical module further includes a transmitting aperture 70. The light 300 passing through the transmitting lens 50 is irradiated on the object to be measured 200 after passing through the transmitting aperture 70. The transmitting aperture 70 is used to limit the beam width of the light 300, can reduce unnecessary light 300, and better control the quality, size and shape of the light 300 shaped by the transmitting lens 50.
[0055] This application also proposes a laser displacement sensor. The laser displacement sensor includes an optical module. The specific structure of the optical module refers to the above embodiments. Since this laser displacement sensor adopts all the technical solutions of the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0056] In summary, for the optical module provided in this application, by arranging a reflection structure 40 on the light path 300 between the receiving element 30 and the object to be measured 200, the reflection surface of the reflection structure 40 is adjacent to the receiving surface 31 of the receiving element 30. The reflection structure 40 can reflect the light 300 that is reflected by the object to be measured 200 and falls outside the range of the receiving surface 31 of the receiving element 30 to the receiving surface 31, which is equivalent to expanding the receiving range of the receiving element 30 so as to be able to receive more light 300 reflected by the object to be measured 200, and further be able to increase the measurement range of the laser displacement sensor.
[0057] The above are only optional embodiments of this application and are not intended to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.
Claims
1. An optical module for detecting a to-be-detected object (200), characterized in that: The optical module includes a module bracket (10), a transmitting element (20) for emitting light (300) to the object to be measured (200), a receiving element (30) disposed on the same side of the object to be measured (200) as the transmitting element (20), and a reflecting structure (40) for reflecting the light (300). The transmitting element (20), the receiving element (30), and the reflecting structure (40) are all disposed on the module bracket (10). The reflecting surface of the reflecting structure (40) is adjacent to the receiving surface (31) of the receiving element (30) and is disposed at an angle to the receiving surface (31). The reflecting structure (40) is configured to reflect the light (300) that is reflected by the object to be measured (200) and falls outside the range of the receiving surface (31) to the receiving surface (31) for reception by the receiving surface (31).
2. The optical module according to claim 1, wherein: The reflecting structure (40) includes a first reflecting mirror (41). The reflecting surface of the first reflecting mirror (41) is adjacent to the side of the receiving surface (31) facing away from the transmitting element (20). The first reflecting mirror (41) is configured to reflect the light (300) that irradiates the side of the receiving surface (31) facing away from the transmitting element (20) to the receiving surface (31); and / or, The reflecting structure (40) includes a second reflecting mirror (42). The reflecting surface of the second reflecting mirror (42) is adjacent to the side of the receiving surface (31) close to the transmitting element (20). The second reflecting mirror (42) is configured to reflect the light (300) that irradiates the side of the receiving surface (31) close to the transmitting element (20) to the receiving surface (31).
3. The optical module according to claim 2, wherein: The included angle range between the reflecting surface of the first reflecting mirror (41) and the receiving surface (31) is 70° to 90°, and the included angle range between the reflecting surface of the second reflecting mirror (42) and the receiving surface (31) is 100° to 120°.
4. The optical module according to claim 1, wherein: The module bracket (10) is provided with a light outlet (11) and a light inlet (12) that are spaced apart from each other. The light outlet (11) and the light inlet (12) are disposed on the same side. The transmitting element (20) emits the light (300) to the object to be measured (200) through the light outlet (11), and the light (300) reflected by the object to be measured (200) irradiates the reflecting structure (40) through the light inlet (12).
5. The optical module according to claim 4, wherein: The light outlet (11) is provided with a first window mirror (81), and the light inlet (12) is provided with a second window mirror (82). The light (300) emitted by the transmitting element (20) passes through the first window mirror (81) and irradiates the object to be measured (200), and the light (300) reflected by the object to be measured (200) passes through the second window mirror (82) and irradiates the reflecting structure (40).
6. The optical module according to any one of claims 1 to 5, characterized in that: The optical module further includes a receiving lens (60), the receiving lens (60) is disposed on the module bracket (10), and the light beam (300) reflected by the object to be measured (200) is focused on the receiving element (30) after passing through the receiving lens (60).
7. The optical module according to any one of claims 1 to 5, characterized in that: The optical module includes a transmitting lens (50), the light beam (300) emitted by the transmitting element (20) is emitted after passing through the transmitting lens (50), and the transmitting lens (50) is used to converge the divergent light beam emitted by the transmitting element (20) into a collimated light beam.
8. The optical module according to claim 7, wherein: The optical module further includes a transmitting aperture (70), the light beam (300) passing through the transmitting lens (50) irradiates the object to be measured (200) after passing through the transmitting aperture (70), and the transmitting aperture (70) is used to limit the beam width of the light beam (300).
9. The optical module according to claim 1, wherein: The optical module further includes a controller, the controller is respectively communicatively connected to the transmitting element (20) and the receiving element (30), the controller is used to control the working state of the transmitting element (20), and is used to receive the signal sent by the receiving element (30).
10. A laser displacement sensor, characterized in that: The laser displacement sensor includes the optical module according to any one of claims 1 to 9.