Optical detection lens module and optical detection device

Abstract

The invention relates to the technical field of optical detection, and provides an optical detection lens module and an optical detection device. The optical detection lens module comprises an objective lens assembly structure, a lens assembly and a position detection assembly. The objective lens assembly structure is provided with a light path channel; the lens assembly is provided with an induction area and comprises a lens body and a protective cover, the lens body is connected with the objective lens assembly structure, and the protective cover covers one end, deviating from the objective lens assembly structure, of the lens body in the optical axis direction and can move relative to the lens body; the position detection assembly is connected to the objective lens assembly structure and arranged corresponding to the induction area, and can cooperate with the induction area to detect the relative position of the lens body and the protective cover along the optical axis direction. The optical detection lens module does not need to consider the problem of light diffuse reflection during distance measurement and the problem of different surface reflectivity of different material samples, improves the positioning accuracy and judgment timeliness of the lens relative to the position of the to-be-detected object, and further improves the protection of the lens and the to-be-detected object.

Description

Technical Field

[0001] The present application relates to the field of optical detection technology, and in particular to an optical detection lens module and an optical detection device. Background Art

[0002] When conducting optical inspections, lenses are an indispensable component on every inspection device. Especially for high-precision inspections, interference lenses with different magnifications may even be used. Such lenses have a short focal length and are closer to the object to be tested. This results in the risk of collision between the lens and the object to be tested, which may lead to damage to the lens or the object to be tested.

[0003] In the related technology, a laser distance measurement sensor is usually used to detect the distance between the lens and the object to be measured in real time, and to feed back to the operating system to prevent the lens from collision. However, when using laser distance measurement, there are often problems such as light diffuse reflection and different surface reflectivity of different material samples, which lead to large distance measurement errors, and then there is a risk of mis-collision due to inaccurate positioning, especially when the object to be measured is made of transparent material, which is more unfavorable for laser distance measurement. Summary of the invention

[0004] Based on this, it is necessary to provide an optical inspection lens module that does not need to consider the problem of diffuse reflection of light during ranging and the problem of different surface reflectivity of samples of different materials, thereby improving the positioning accuracy and timeliness of the lens relative to the object to be measured, thereby improving the protection of the lens and the object to be measured.

[0005] An optical detection lens module comprises an objective lens assembly structure, a lens component and a position detection component; the objective lens assembly structure is provided with an optical path channel having an optical axis direction; the lens component comprises a lens body and a protective cover, the lens body is connected to the objective lens assembly structure, the protective cover is provided at one end of the lens body away from the objective lens assembly structure along the optical axis direction, and can move relative to the lens body along the optical axis direction, the protective cover is provided with a light-transmitting port penetrating along the optical axis direction; the position detection component is connected to the objective lens assembly structure; wherein the lens assembly is provided with a sensing area, the position detection component is arranged corresponding to the sensing area, and the position detection component can cooperate with the sensing area to detect the relative position of the lens body and the protective cover along the optical axis direction.

[0006] It is understandable that a protective cover is provided at one end of the lens body away from the objective lens converter to protect the lens body. When the optical detection lens module moves down to detect the object to be tested, the protective cover can preferentially contact the object to be tested, and can move toward one side of the objective lens assembly structure along the optical axis under the reaction force of the object to be tested. Since the lens assembly is provided with a sensing area, the movement of the protective cover causes the coordination change between the sensing area and the position detection assembly, which is conducive to the staff to make timely judgments and handle, avoid direct collision between the lens body and the object to be tested, and improve the protection of the lens body and the object to be tested. Moreover, in the entire detection process, it does not depend on the material of the object to be tested, so there will be no problem of diffuse reflection of light and the problem of different surface reflectivity of samples of different materials, which improves the detection accuracy and positioning accuracy; and the movement of the protective cover relative to the lens body does not affect the optical path and connection stiffness of the lens body itself, effectively ensuring the imaging quality during the detection process.

[0007] In some embodiments, the sensing area includes a first sensing area and a second sensing area arranged on the side of the lens assembly, the first sensing area is located on the side of the second sensing area away from the objective lens assembly structure, and the first sensing area and the second sensing area selectively cooperate with the position detection component based on the relative movement of the protective cover and the lens body; wherein the first sensing area cooperates with the position detection component to feedback pre-collision information of the lens body.

[0008] In some embodiments, the position detection component includes at least a sensor; the first sensing area and the second sensing area can selectively correspond to the sensor to respectively feed back different sensing signals to the sensor; wherein the first sensing area is used to feed back a first sensing signal to the sensor, the second sensing area is used to feed back a second sensing signal different from the first sensing signal to the sensor, and the first sensing signal is used to feed back lens pre-collision information.

[0009] In some embodiments, the first sensing area and the second sensing area are both located on the side of the protective cover; or, the first sensing area is located on the side of the protective cover, and the second sensing area is located on the side of the lens body.

[0010] In some embodiments, the distance between the bottom end of the protective cover and the bottom end of the lens body along the optical axis is L1, the distance between the initial sensing position and the first sensing area along the optical axis is L2, and L1 is not less than L2; wherein the initial sensing position is the position corresponding to the sensor in the second sensing area in the initial state.

[0011] In some embodiments, the sensor includes a photoelectric sensor, and the sensing area is used to feed back at least one change information of distance, color, and light intensity to the photoelectric sensor.

[0012] In some embodiments, the detection direction of the position detection component is set at an angle to the optical axis direction; the protective cover includes a cover body and a detection part provided on the cover body, the cover body is slidably connected to the lens body, and the detection part is located in the first sensing area or the second sensing area; along the detection direction, there is a first distance between the cover body and the position detection component, and there is a second distance between the detection part and the position detection component, and the first distance and the second distance are different.

[0013] In some embodiments, the objective lens assembly structure includes a fixed seat and an objective lens converter rotatably connected to the fixed seat, the optical path channel is set through the fixed seat, the objective lens converter is provided with a plurality of assembly cavities arranged at intervals and passing through along its own thickness direction, the objective lens converter can be rotated relative to the fixed seat so that one of the plurality of assembly cavities is connected to the optical path channel, each of the assembly cavities is correspondingly provided with a group of the lens assemblies, and when each group of the lens assemblies is rotated to be connected to the optical path channel, its sensing area corresponds to the position detection assembly.

[0014] In some embodiments, among the multiple assembly cavities, one that is connected to the optical path channel is a detection assembly cavity, and the other assembly cavities are spare assembly cavities, and the lens assembly on the detection assembly cavity corresponds to the position detection assembly; the objective lens assembly structure is provided with an assembly edge, and the assembly edge is located on a side of the detection assembly cavity away from the spare assembly cavity, and the position detection assembly is arranged at the assembly edge.

[0015] In some embodiments, the objective lens assembly structure further includes an adapter seat, which is connected to the fixed seat and together encloses the optical path channel; and the position detection component is connected to the adapter seat.

[0016] In some embodiments, the lens body at least includes a lens barrel, the cover body is sleeved on the outside of the lens barrel and is slidably connected to the lens barrel; the protective cover also includes a floating member, and the floating member is connected between the cover body and the lens barrel.

[0017] In some of the embodiments, one of the cover body and the lens barrel is provided with an abutting end surface, and one end of the floating member is provided at the other, and the other end abuts against the abutting end surface.

[0018] In some of the embodiments, the position detection assembly includes a mounting seat and a sensor connected to the mounting seat, and the mounting seat is connected to the objective lens mounting structure.

[0019] In some embodiments, the position detection component also includes an adjustment seat and a locking member, the adjustment seat is movably connected to the assembly seat, and the sensor is connected to the adjustment seat; the adjustment seat can move relative to the assembly seat along the optical axis direction, the sensor moves synchronously, and the locking member is used to lock the adjustment seat to the assembly seat.

[0020] The present application also provides an optical detection device, including a light source module, an imaging module and a controller; the light source module is used to emit illumination light to the object to be detected, the imaging module includes an imaging lens and a camera, the imaging lens is the above-mentioned optical detection lens module, and the controller is communicatively connected with the position detection component to receive the detection signal of the position detection component to determine whether the optical detection lens module is pre-collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of an optical detection lens module provided in one embodiment of the present application;

[0023] Figure 2 A top view of an optical detection lens module provided in one embodiment of the present application;

[0024] Figure 3 for Figure 2 Cross-section of the middle AA;

[0025] Figure 4 for Figure 3 A partial enlarged cross-sectional view of the optical detection lens module provided;

[0026] Figure 5 A bottom view of an optical detection lens module provided in one embodiment of the present application;

[0027] Figure 6 A partial side view of an optical detection lens module provided in one embodiment of the present application;

[0028] Figure 7 A partial side view of an optical detection lens module provided in another embodiment of the present application.

[0029] : 10, objective lens assembly structure; 11, fixing seat; 12, objective lens converter; 13, adapter seat; 20, lens assembly; 21, lens body; 22, protective cover; 30, position detection assembly; 31, assembly seat; 32, sensor; 33, adjustment seat; 34, adjustment column; 35, locking member; 40, guide structure; 41, guide hole; 42, guide protrusion; 51, abutment end face; 101, optical path channel; 102, assembly edge; 120, assembly cavity; 120a, detection assembly cavity; 120b, spare assembly cavity; 211, lens barrel; 221, cover body; 222, detection part; 223, floating member; 301, adjustment hole; 311, first connecting arm; 312, second connecting arm; 2201, light transmission port. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0035] Optical lenses are an indispensable structure in optical testing, especially for high-precision testing, which requires the use of interference lenses with different magnifications. The focal length of this type of lens is short, and when the lens is close to the object to be tested during testing, there is a risk of collision between the lens and the object to be tested.

[0036] In the related technology, a laser ranging sensor is usually used to detect the distance to the object to be measured in real time, and feedback is given to the operating system to facilitate timely anti-collision response. For example, the operating system can issue an alarm to warn the staff to manually stop the detection; or, the operating system issues a command to the structure that adjusts the movement of the lens to drive the lens to move in the opposite direction to avoid collision. Although such a setting can have an anti-collision effect to a certain extent, there are often problems such as light diffuse reflection and different surface reflectivity of samples of different materials during laser ranging, which leads to large ranging errors and easy to cause accidental collisions due to inaccurate positioning. Especially when the object to be measured is made of transparent material, it is not conducive to laser ranging.

[0037] In addition, there is also a method in the related art of adding a floating sensing device between the lens and the objective lens converter to cause the lens to move when the lens collides with the object to be tested. The floating sensing device feeds back a floating signal to the operating system, and the operating system controls the motor to rotate in the opposite direction to adjust the distance between the lens and the object to be tested, thereby protecting the lens. However, since the objective lens converter is used to connect to the optical system, the above-mentioned floating sensing device is equivalent to being set between the lens and the optical system, resulting in a weakening of the connection rigidity of the lens, and then resulting in a reduction in the image quality during the detection process. Moreover, such a setting not only causes the optical path from the optical system to the lens to become longer, affecting the uniformity of the light; moreover, the length of the entire optical path will change during the floating process of the lens. Since the optical path length of the optical system has a certain range requirement, if it exceeds this range, it will be unusable.

[0038] In response to the above problems, an embodiment of the present application provides an optical detection lens module. On the one hand, there is no need to consider the problem of light diffuse reflection and the problem of different reflectivity of samples of different materials when measuring distance, thereby improving the positioning accuracy and timeliness of the lens relative to the object to be measured, and improving the protection of the lens and the object to be measured; on the other hand, not only does it not change the original optical path length and eliminate the influence on light uniformity, but it can also ensure the connection rigidity between the lens and the objective lens converter and improve the detection accuracy. The optical detection lens module is described in detail below.

[0039] See also Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 The optical detection lens module provided by one embodiment of the present application includes an objective lens assembly structure 10, a lens assembly 20 and a position detection assembly 30. The objective lens assembly structure 10 is provided with an optical path channel 101, and the optical path channel 101 has an optical axis direction. The lens assembly 20 is connected to the objective lens assembly structure 10 for optical detection. Among them, the lens assembly 20 includes a lens body 21 and a protective cover 22, one end of the lens body 21 is connected to the objective lens assembly structure 10, and the protective cover 22 is provided at the other end of the lens body 21, that is, the lens body 21 is away from the end of the objective lens assembly structure 10 along the optical axis direction. The protective cover 22 is movably connected to the lens body 21 and can move relative to the lens body 21 along the optical axis direction. The protective cover 22 is provided with a light-transmitting port 2201 that runs through along the optical axis direction to allow light to pass smoothly, which is conducive to the detection of the object to be tested.

[0040] Furthermore, a sensing area is provided on the lens assembly 20, and the position detection assembly 30 is connected to the objective lens assembly structure 10 and is arranged corresponding to the sensing area. The position detection assembly 30 can cooperate with the sensing area to detect the relative position of the lens body 21 and the protective cover 22 along the optical axis.

[0041] It can be understood that a protective cover 22 is provided at one end of the lens body 21 away from the objective lens assembly structure 10 to protect the lens body 21 and prevent the lens body 21 from being directly hit. In particular, when the optical detection lens module moves down to detect the object to be tested, the protective cover 22 can contact the object to be tested before the lens body 21. At this time, due to the movable setting of the protective cover 22 relative to the lens body 21, the protective cover 22 moves along the optical axis direction toward one side of the objective lens assembly structure 10 under the reaction force of the object to be tested; that is, the position of the protective cover 22 relative to the lens body 21 changes. In this process, it is precisely because the lens assembly 20 is provided with a sensing area that the position detection assembly 30 can cooperate with the sensing area to detect the relative position of the protective cover 22 and the lens body 21 along the optical axis direction, thereby facilitating the staff to make timely judgments and handle, avoiding the direct collision of the lens body 21 with the object to be tested, and improving the protection of the lens body 21 and the object to be tested. Moreover, during the entire detection process, since it does not depend on the material of the object to be detected, there will be no problem of diffuse reflection of light and different reflectivity of the surface of samples of different materials, thereby improving the detection accuracy and positioning accuracy. In addition, the movement of the protective cover 22 relative to the lens body 21 does not affect the optical path and connection rigidity of the lens body 21 itself, thereby effectively ensuring the imaging quality during the detection process and improving the light uniformity while ensuring that the optical path length does not need to change.

[0042] Please continue reading Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 In some embodiments, the sensing area includes a first sensing area and a second sensing area provided on the side of the lens assembly 20, and the first sensing area and the second sensing area are arranged spaced or adjacently along the optical axis. The first sensing area and the second sensing area are selectively matched with the position detection assembly 30 based on the relative movement of the protective cover 22 and the lens body 21.

[0043] That is to say, when the first sensing area cooperates with the position detection component 30, the position detection component 30 can feedback a kind of detection information, and when the second sensing area cooperates with the position detection component 30, the position detection component 30 feedbacks another kind of detection information. Since the first sensing area and the second sensing area are arranged along the optical axis, when the position of the protective cover 22 changes relative to the lens body 21 under the reverse action applied by the aforementioned object to be detected, one of the first sensing area and the second sensing area cooperates with the position detection component 30. For example, when the position of the protective cover 22 does not change, the second sensing area cooperates with the position detection component 30; when the position of the protective cover 22 changes, the first sensing area cooperates with the position detection component 30.

[0044] In some specific embodiments, the first sensing area is located on the side of the second sensing area away from the objective lens assembly structure 10 along the optical axis direction, and the first sensing area cooperates with the position detection component 30 to feedback the pre-collision information of the lens body 21. Take the optical axis direction as the Z-axis direction as an example. Since the protective cover 22 moves upward along the Z-axis after contacting the object to be measured, when the position detection component 30 cooperates with the first sensing area, it means that the protective cover 22 is in contact with the object to be measured and moves in the reaction force to cause the position of the protective cover 22 to change, that is: the first sensing area cooperates with the position detection component 30 after the position of the protective cover 22 changes. In this process, the lens body 21 does not contact the object to be measured, so it will not cause problems such as shaking of the lens body 21, which is conducive to timely adjustment by the staff. Among them, the second sensing area can be coordinated with the position detection component 30 when the position of the protective cover 22 does not change.

[0045] As mentioned above, in the related art, when a floating sensing device is used for collision feedback, usually after the lens collides with the object to be measured and causes the lens to move, the floating sensing device feeds back a floating signal. This causes the lens to shake due to the collision, thereby affecting the image quality. However, in the embodiment of the present application, the first sensing area and the position detection component 30 are used to timely feedback the pre-collision information. At this time, only the protective cover 22 collides with the object to be measured. After the collision, the protective cover 22 will move upward relative to the lens body 21, that is, the protective cover 22 will have a buffer distance after the collision, and in this buffer distance, the lens body 21 does not collide with the object to be measured. Therefore, the lens body 21 will not shake or sway, thereby improving the image quality.

[0046] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 , optionally, the position detection component 30 comprises a sensor 32 and an assembly seat 31 connected to the sensor 32, and the sensor 32 is installed on the object lens assembly structure 10 through the assembly seat 31. The setting of the assembly seat 31 is conducive to adjusting the installation position of the object lens assembly structure 10 and the installation height of the sensor 32. The first sensing area and the second sensing area can be selected to correspond to the sensor 32, so as to feed back different sensing signals to the sensor 32 respectively, and then prompt the sensor 32 to feed back different detection signals. When actually used, the optical detection lens module also includes a control center, and the sensor 32 is connected to the control center. The detection signal of the sensor 32 is transmitted to the control center. After the control center analyzes and processes it, it can send instructions to the prompt terminal, which is conducive to prompting the staff to make feedback in time. The prompt terminal can be a siren, a warning light, etc.

[0047] The first sensing area is used to feed back a first sensing signal to the sensor 32, the second sensing area is used to feed back a second sensing signal different from the first sensing signal to the sensor 32, and the first sensing signal is used to feed back lens pre-collision information. In other words, the first sensing area and the second sensing area feed back different information, which is conducive to the sensor 32 feeding back different detection signals.

[0048] Further, the sensor 32 may be a photoelectric sensor, and the sensing area is used to feedback at least one change information of distance, color, and light intensity to the photoelectric sensor. Taking the sensing area feedback distance change information as an example, the distance information fed back to the sensor 32 by the first sensing area and the second sensing area is different. For example, the distance information fed back by the first sensing area is less than the distance information fed back by the second sensing area. When no collision occurs, the second sensing area corresponds to the sensor 32; when the protective cover 22 contacts the object to be measured and moves upward, the second sensing area is caused to stagger with the sensor 32, and the first sensing area corresponds to the sensor 32. At this time, the sensing signals received by the sensor 32 are different, and then the first detection signal corresponding to the first sensing signal is fed back, and when the sensor 32 feeds back the first detection signal, the protective cover 22 has a buffer distance to ensure that the lens body 21 does not contact the object to be measured. Therefore, it is possible to know whether the lens assembly 20 collides with the object to be measured through different distance change information, which is conducive to timely judgment and processing, such as timely cutting off the downward movement drive of the optical detection lens module, and causing the optical detection lens module to move upward to move away from the object to be measured.

[0049] Of course, the sensing area can also be used to feed back light intensity information to the photoelectric sensor, using the different strengths of the light signals corresponding to the first sensing area and the second sensing area, where the light signal intensity corresponding to the first sensing area is greater than the light signal intensity corresponding to the second sensing area. For example, a reflective sheet with high reflectivity or low reflectivity is set in one of the areas, which is only used as an example here.

[0050] Based on the different change information fed back by the sensing area, the sensor 32 may be a distance sensor that uses laser, infrared, or ultrasonic waves to measure the distance. Alternatively, the sensor 32 may use a color sensor, for example, using the spectral characteristics of different colors to determine the colors corresponding to the first sensing area and the second sensing area, for example, the first sensing area feeds back red light, and the second sensing area feeds back green light. Alternatively, the sensor 32 may use a light intensity sensor, such as a photoresistor, whose resistance value changes with the change of light intensity. In this case, the first sensing area and the second sensing area may be provided with lighting lamps of different light intensities, respectively, to act on the sensor 32.

[0051] See also Figure 3 and Figure 4Optionally, the distance between the bottom end of the protective cover 22 and the bottom end of the lens body 21 along the optical axis is L1, and the distance between the initial sensing position and the first sensing area along the optical axis is L2, and L1 is not less than L2. The initial sensing position is the position corresponding to the sensor 32 in the second sensing area in the initial state. Such a setting ensures that the protective cover 22 has a sufficient buffer distance to prevent the lens body 21 from colliding with the object to be measured after the positions of the first sensing area and the second sensing area relative to the sensor 32 are switched.

[0052] The first sensing area and the second sensing area are adjacent to each other. Thus, as long as the protective cover 22 moves upward, the first sensing area can be caused to correspond to the sensor 32 in time, thereby improving the timeliness of feedback.

[0053] See also Figure 1 , Figure 3 , Figure 4 and Figure 6 Furthermore, the first sensing area and the second sensing area are both located at the side of the protective cover 22. In this case, there is no need to modify the lens body 21, and only two sensing areas distributed along the optical axis need to be provided on the protective cover 22, which is convenient for production and manufacturing; moreover, the protective cover 22 can be applied to different lens bodies 21, which enhances flexibility.

[0054] See also Figure 7 Alternatively, the first sensing area is located at the side of the protective cover 22, and the second sensing area is located at the side of the lens body 21. For example, when it is necessary to respectively set a lighting lamp or a structure for emitting light in the first sensing area and the second sensing area, the two sensing areas are respectively set on the protective cover 22 and the lens body 21, which can reduce the load of the protective cover 22.

[0055] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 As some of the exemplary ones, the detection direction of the position detection component 30 is set at an angle to the optical axis direction. For example, if the optical axis direction is along the Z-axis direction, then the detection direction of the position detection component 30 is along the X-axis direction. The protective cover 22 includes a cover body 221 and a detection portion 222 provided on the cover body 221, the cover body 221 is slidably connected to the lens body 21, and the detection portion 222 is located in the first sensing area or the second sensing area. Along the detection direction (i.e., the X-axis direction), there is a first spacing between the cover body 221 and the position detection component 30, and there is a second spacing between the detection portion 222 and the position detection component 30, and the first spacing and the second spacing are different.

[0056] That is to say, the first sensing area and the second sensing area are both provided on the protective cover 22, and the sensor 32 in the position detection assembly 30 adopts a distance sensor, so as to feedback different detection signals by setting different spacings compared with the sensor 32. For example, the first spacing may be greater than the second spacing, and at this time, the detection portion 222 protrudes radially from the cover body 221 in the cover body 221. The first sensing area corresponds to the area below the detection portion 222 on the cover body 221, and corresponds to the first spacing N; and the second sensing area corresponds to the area of ​​the detection portion 222, and corresponds to the second spacing M. In the initial state, the sensor 32 corresponds to the detection portion 222 and detects the second spacing, and the area on the protective cover 22 corresponding to the detection portion 222 is the second sensing area. The first sensing area is provided on the cover body 221 and is located below the second sensing area. When the protective cover 22 moves upward in the Z axis due to contact with the object to be detected, the detection portion 222 moves upward accordingly, causing the first sensing area to correspond to the sensor 32, and the sensor 32 detects the first spacing. Therefore, the sensor 32 can send out different detection signals according to the detected distance change information to ensure that the staff is reminded in time at the first distance.

[0057] Alternatively, the first spacing may be smaller than the second spacing. Then the detection portion 222 is a groove concavely arranged on the cover body 221 .

[0058] It should be noted that the aforementioned detection direction is the transmission direction of the distance sensor emitting sound waves, electromagnetic waves, lasers, etc.

[0059] like Figure 7 As shown, alternatively, when the first sensing area is provided on the protective cover 22 and the second sensing area is provided on the lens body 21. Since the protective cover 22 itself has a certain wall thickness, and there is a gap between the inner wall of the protective cover 22 and the outer wall of the lens body 21. Therefore, the first spacing N corresponding to the first sensing area and the second spacing M corresponding to the second sensing area are also different, that is, the first spacing is smaller than the second spacing. In the initial state, the sensor 32 corresponds to the second sensing area on the lens body 21; when the protective cover 22 moves upward based on the action of the object to be measured, the upper position of the protective cover 22 blocks the second sensing area, and the sensor 32 corresponds to the first sensing area on the protective cover 22.

[0060] See also Figure 1 , Figure 3 , Figure 5 and Figure 6In some embodiments, the objective lens assembly structure 10 includes a fixed seat 11 and an objective lens converter 12 rotatably connected to the fixed seat 11, the optical path channel 101 is arranged through the fixed seat 11, and the objective lens converter 12 is provided with a plurality of assembly cavities 120 arranged at intervals and extending along its thickness direction, and the objective lens converter 12 can rotate relative to the fixed seat 11 so that one of the plurality of assembly cavities 120 is connected to the optical path channel 101. Each assembly cavity 120 is correspondingly provided with a group of lens assemblies 20. When each group of lens assemblies 20 rotates to connect to the optical path channel 101, it cooperates with the position detection assembly 30 through its corresponding sensing area.

[0061] That is to say, by setting a plurality of assembly cavities 120 on the objective lens converter 12, different lens assemblies 20 can be quickly switched, and different lens assemblies 20 can correspond to different magnifications, different fields of view or different optical characteristics, etc., so as to adapt to different detection requirements; and, during detection, it is ensured that there is only one set of lens assemblies 20 corresponding to the optical path channel 101, so as to improve the coaxial accuracy of imaging. In this process, since each lens assembly 20 is provided with a first sensing area and a second sensing area, when it is rotated to a coaxial position with the optical path channel 101, the anti-collision detection of the lens body 21 during the detection process can be met.

[0062] Further, among the multiple assembly cavities 120, one connected to the optical path channel 101 is a detection assembly cavity 120a, and the other assembly cavities 120 are spare assembly cavities 120b, and the lens assembly 20 on the detection assembly cavity 120a corresponds to the position detection assembly 30. The objective lens assembly structure 10 is provided with an assembly edge 102, and the assembly edge 102 is located on the side of the detection assembly cavity 120a away from the spare assembly cavity 120b, and the position detection assembly 30 is arranged at the assembly edge 102. Such a setting ensures that the position detection assembly 30 can cooperate with the sensing area on any lens assembly 20 connected to the optical path channel 101, so as to meet the anti-collision detection of each lens assembly 20, thereby improving the use safety and the imaging quality of each lens assembly 20.

[0063] like Figure 5 As shown, in some specific embodiments, taking the objective lens converter 12 having five assembly cavities 120 as an example, the assembly cavity 120 located at the rightmost side along the X-axis direction is the detection assembly cavity 120a, and the rest are spare assembly cavities 120b. At this time, taking the two spare assembly cavities 120b close to the detection assembly cavity 120a as an example, a first reference line E is provided on one side close to the detection assembly cavity 120a, and the first reference line is tangent to the two spare assembly cavities 120b, and the edge of the objective lens assembly structure 10 located on the right side of the first reference line along the X-axis direction is defined as the assembly edge 102. In this way, it can be ensured that the sensor 32 will not be blocked by the lens assembly 20 in all the spare assembly cavities 120b, thereby improving the detection accuracy.

[0064] like Figures 1 to 3 As shown, in actual use, the objective lens assembly structure 10 also includes an adapter 13, which is connected to the fixed seat 11 and is jointly surrounded by an optical path channel 101. The position detection component 30 is connected to the adapter 13. The setting of the adapter 13 is conducive to the coordination of the optical detection lens module with other structures to ensure the benchmark of the optical path channel 101. The position detection component 30 is connected to the adapter 13, which is not only conducive to the disassembly and assembly of the position detection component 30, but also improves the detection accuracy of the position detection component 30. Wherein, the sensor 32 in the position detection component 30 is connected to the adapter 13 of the objective lens assembly structure 10 through the assembly seat 31, such as a detachable connection, which is conducive to replacing and repairing the sensor 32. In addition, the sensor 32 in the position detection assembly 30 in the embodiment of the present application is not directly connected to the lens assembly 20. Compared with the method of adding a floating sensing device between the lens and the objective lens converter in the related art, the lens assembly 20 can share one sensor 32 (relative to multiple lens assemblies 20) and does not move with the lens assembly 20 regardless of whether it is rotating or extending. This ensures the installation independence of the sensor 32 and the lens assembly 20, thereby ensuring that the optical detection of the lens assembly 20 and the pre-collision information detection of the sensor 32 will not interfere with each other, thereby improving the detection accuracy and stability of each.

[0065] Furthermore, the position detection assembly 30 also includes an adjustment seat 33 and a locking member 35. The adjustment seat 33 is movably connected to the assembly seat 31, and the sensor 32 is connected to the adjustment seat 33. The adjustment seat 33 can move along the optical axis relative to the assembly seat 31, and the sensor 32 moves synchronously. The locking member 35 is used to lock the adjustment seat 33 to the assembly seat 31. In other words, through the arrangement of the adjustment seat 33 and the locking member 35, the installation position adjustment of the sensor 32 can be met, especially the position along the optical axis, that is, the height adjustment along the vertical direction, to adapt to a variety of usage scenarios.

[0066] Specifically, the adjustment seat 33 is slidably connected with the assembly seat 31. The assembly seat 31 is provided with a slide groove whose length extends along the optical axis direction, part of the adjustment seat 33 is inserted in the slide groove, and the other part protrudes from the bottom of the assembly seat 31, which is used to be connected and fixed with the sensor 32. The assembly seat 31 is provided with two fastening holes, and the adjustment seat 33 is provided with an adjustment hole 301 whose length is along the optical axis direction, and each fastening hole corresponds to a locking piece 35. The two locking pieces 35 pass through the adjustment holes 301 and are threadedly connected with the hole walls of the corresponding fastening holes. The setting of the adjustment holes 301 not only facilitates the position adjustment of the adjustment seat 33, but also guides the movement of the adjustment seat 33. When disassembling, loosen the locking piece 35 and move the adjustment seat 33, and tighten the locking piece 35 after it is in place to press the adjustment seat 33 onto the assembly seat 31.

[0067] Further, the assembly seat 31 is provided with an assembly platform convexly along the X-axis direction toward the side away from the lens assembly 20, and the adjustment seat 33 is provided with an adjustment platform convexly along the X-axis direction toward the side away from the lens assembly 20. The position detection assembly 30 also includes an adjustment column 34, which passes through the assembly platform and is connected to the adjustment platform. The adjustment column 34 can rotate around its own axis to drive the adjustment seat 33 to rise and fall along the Z-axis direction (i.e., the optical axis direction). The adjustment column 34 is threadedly connected to the adjustment seat 33.

[0068] like Figures 1 to 3 As shown, in some embodiments, the assembly seat 31 includes a first connecting arm 311 and a second connecting arm 312, which are connected and arranged at an angle. The end of the first connecting arm 311 away from the second connecting arm 312 is connected to the objective lens assembly structure 10, and the end of the second connecting arm 312 away from the first connecting arm 311 is connected to the sensor 32. In other words, the second connecting arm 312 extends along the optical axis direction to cooperate with the adjustment seat 33. The first connecting arm 311 includes two arm bodies that are opposite and spaced along the Y-axis direction, and the two arm bodies are arranged on both sides of the adapter seat 13 along the Y-axis direction, and each arm body is fastened to the adapter seat 13 by screws. In this way, the assembly of the position detection component 30 relative to the objective lens assembly structure 10 can be realized; and, by utilizing the cooperation of the two arm bodies, the connection reliability is improved, and the force balance and stability are guaranteed.

[0069] The adapter 13 is provided with a straight pressing surface on both sides along the Y-axis direction, and the two arms are respectively pressed on the pressing surface on the same side, and the connection reliability is improved by surface contact. The lower surfaces of the two arms can be pressed on the fixing seat 11 to improve the support, reduce the shear force on each screw, and improve the structural strength.

[0070] Please combine Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As some of the optional ones, the lens body 21 at least includes a lens barrel 211, and the protective cover 22 includes a cover body 221 and a floating member 223, the cover body 221 is sleeved on the outside of the lens barrel 211, and is slidably connected with the lens barrel 211, and the floating member 223 is connected between the cover body 221 and the lens barrel 211. In other words, it is precisely because of the setting of the floating member 223 that it can be ensured that the bottom of the cover body 221 has a movement margin for moving upward when it contacts the object to be measured, and then after being away from the object to be measured, the cover body 221 can move downward under the action of the floating member 223 to restore the initial position, which is conducive to playing an anti-collision effect again. In addition, by utilizing the sliding connection between the cover body 221 and the lens barrel 211, the movement of the cover body 221 relative to the lens can be guided, so as to avoid the cover body 221 from tilting and causing the lens body 21 to shake.

[0071] It should be noted that the inner diameter of the cover body 221 is greater than the outer diameter of the lens barrel 211 , so that the cover body 221 moves along the optical axis under the guidance of the guide structure 40 without contacting the lens barrel 211 .

[0072] Further, one of the cover body 221 and the lens barrel 211 is provided with an abutting end surface 51, and one end of the floating member 223 is provided at the other, and the other end abuts against the abutting end surface 51. Such a configuration is conducive to the assembly and transmission of the force of the floating member 223. Among them, a groove cavity may be concavely provided at an upper end of the cover body 221, and the lower end of the floating member 223 is accommodated in the groove cavity. The cavity wall along the horizontal direction of the groove cavity forms the abutting end surface 51, and the upper end of the floating member 223 is connected to the lens barrel 211.

[0073] There are multiple floating members 223, which are arranged at intervals along the circumference of the cover body 221. The floating members 223 can also be spring pins, springs, etc.

[0074] Furthermore, a guide structure 40 is connected between the lens barrel 211 and the cover body 221. The guide structure 40 includes a guide hole 41 and a guide protrusion 42. The length of the guide hole 41 extends along the optical axis direction. The guide protrusion 42 is penetrated through the guide hole 41 and can move in the guide hole 41 along the length direction of the guide hole 41. The guide protrusion 42 can be convexly arranged on the outer side wall of the lens barrel 211, and the guide hole 41 is arranged on the cover body 221. Alternatively, the guide hole 41 is arranged on the outer side wall of the lens barrel 211, and the guide protrusion 42 is convexly arranged on the inner side wall of the cover body 221.

[0075] like Figure 1 As shown, another embodiment of the present application further provides an optical detection device, including a light source module, an imaging module and a controller; the light source module is used to emit illumination light to the object to be detected, the imaging module includes an imaging lens and a camera, the imaging lens is the above-mentioned optical detection lens module, and the controller is communicatively connected with the position detection component 30, and is used to receive the detection signal of the position detection component 30 to determine whether the optical detection lens module is pre-collision.

[0076] That is to say, when the object to be tested is detected, it is necessary to use the light source module to emit illumination light to the object to be tested to ensure that the field of view of the imaging module is bright. Then, the imaging module is driven to move downward in the vertical direction by a manipulator or other driving structure to gradually approach the object to be tested. After moving to the target height, the imaging detection of the object to be tested can be performed. In this process, it is precisely because the focal lengths of the imaging lenses corresponding to different imaging requirements are different that the distance relative to the object to be tested during the movement is also different. Therefore, when the protective cover 22 contacts the object to be tested, it can move in the opposite direction (i.e., move upward) in time under the reaction force of the object to be tested, causing the second sensing area to be staggered relative to the sensor 32, and the first sensing area corresponds to the sensor 32. Since the sensing information fed back by the first sensing area and the second sensing area is different, the sensor 32 can detect this change, and then transmit it to the controller, and analyze and process it through the controller. If the controller determines that the corresponding pre-collision information is generated, it can send an instruction or interrupt the drive instruction to the warning module to remind the staff to respond in time. Since the controller determines the pre-collision information of the lens body 21 based on the detection signal, the lens body 21 will not collide with the object to be tested during the whole process. The controller can issue new instructions in time to ensure the stability of the entire imaging module and improve the stability of optical detection.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An optical detection lens module, characterized in that: include: An objective lens assembly structure (10) is provided with an optical path channel (101) having an optical axis direction; A lens assembly (20), comprising a lens body (21) and a protective cover (22), wherein the lens body (21) is connected to the objective lens assembly structure (10), the protective cover (22) is arranged on an end of the lens body (21) away from the objective lens assembly structure (10) along the optical axis direction, and is movable relative to the lens body (21) along the optical axis direction, and the protective cover (22) is provided with a light-transmitting port (2201) penetrating along the optical axis direction; A position detection component (30) connected to the objective lens assembly structure (10); The lens assembly (20) is provided with a sensing area, the position detection assembly (30) is arranged corresponding to the sensing area, and the position detection assembly (30) can cooperate with the sensing area to detect the relative position of the lens body (21) and the protective cover (22) along the optical axis direction.

2. The optical detection lens module according to claim 1, characterized in that: The sensing area comprises a first sensing area and a second sensing area arranged on the side of the lens assembly (20), the first sensing area being located on a side of the second sensing area away from the objective lens assembly structure (10), and the first sensing area and the second sensing area selectively cooperate with the position detection assembly (30) based on the relative movement of the protective cover (22) and the lens body (21); The first sensing area cooperates with the position detection component (30) to feed back pre-collision information of the lens component (20).

3. The optical detection lens module according to claim 2, characterized in that: The position detection component (30) comprises at least a sensor (32); The first sensing area and the second sensing area can selectively correspond to the sensor (32) to respectively feed back different sensing signals to the sensor (32); The first sensing area is used to feed back a first sensing signal to the sensor (32), the second sensing area is used to feed back a second sensing signal different from the first sensing signal to the sensor (32), and the first sensing signal is used to feed back lens pre-collision information.

4. The optical detection lens module according to claim 3, characterized in that: The distance between the bottom end of the protective cover (22) and the bottom end of the lens body (21) along the optical axis direction is L1, the distance between the initial sensing position and the first sensing area along the optical axis direction is L2, and L1 is not less than L2; The initial sensing position is a position corresponding to the sensor (32) in the second sensing area in an initial state.

5. The optical detection lens module according to claim 3, characterized in that: The first sensing area and the second sensing area are both located on the side of the protective cover (22); or, The first sensing area is located on a side of the protective cover (22), and the second sensing area is located on a side of the lens body (21).

6. The optical detection lens module according to any one of claims 3 to 5, characterized in that: The sensor (32) comprises a photoelectric sensor, and the sensing area is used to feed back at least one change information of distance, color and light intensity to the photoelectric sensor.

7. The optical detection lens module according to claim 3, characterized in that: The detection direction of the position detection component (30) is set at an angle to the direction of the optical axis; The protective cover (22) comprises a cover body (221) and a detection portion (222) provided on the cover body (221), the cover body (221) is slidably connected to the lens body (21), and the detection portion (222) is located in the first sensing area or the second sensing area; Along the detection direction, there is a first distance between the cover body (221) and the position detection component (30), and there is a second distance between the detection portion (222) and the position detection component (30), and the first distance and the second distance are different.

8. The optical detection lens module according to claim 1, characterized in that: The objective lens assembly structure (10) comprises a fixed seat (11) and an objective lens converter (12) rotatably connected to the fixed seat (11); the optical path channel (101) is arranged through the fixed seat (11); the objective lens converter (12) is provided with a plurality of assembly cavities (120) arranged at intervals and extending along the thickness direction thereof; the objective lens converter (12) can be rotated relative to the fixed seat (11) so that one of the plurality of assembly cavities (120) is selectively connected to the optical path channel (101); each assembly cavity (120) is correspondingly provided with a group of the lens assemblies (20); and when each group of the lens assemblies (20) is rotated to be connected to the optical path channel (101), the sensing area thereof corresponds to the position detection assembly (30).

9. The optical detection lens module according to claim 8, characterized in that: Among the plurality of assembly cavities (120), one that is in communication with the optical path channel (101) is a detection assembly cavity (120a), and the remaining assembly cavities (120) are spare assembly cavities (120b); the lens assembly (20) on the detection assembly cavity (120a) corresponds to the position detection assembly (30); The objective lens assembly structure (10) is provided with an assembly edge (102), the assembly edge (102) is located on a side of the detection assembly cavity (120a) away from the spare assembly cavity (120b), and the position detection component (30) is arranged at the assembly edge (102).

10. The optical detection lens module according to claim 8, characterized in that: The objective lens assembly structure (10) further comprises an adapter seat (13), wherein the adapter seat (13) is connected to the fixing seat (11) and together they enclose the optical path channel (101); The position detection component (30) is connected to the adapter (13).

11. The optical detection lens module according to claim 1, characterized in that: The lens body (21) at least comprises a lens barrel (211); the protective cover (22) comprises a cover body (221) and a floating member (223); the cover body (221) is sleeved on the outside of the lens barrel (211) and is slidably connected to the lens barrel (211); and the floating member (223) is connected between the cover body (221) and the lens barrel (211).

12. The optical detection lens module according to claim 11, characterized in that: One of the cover body (221) and the lens barrel (211) is provided with an abutting end surface (51), and one end of the floating member (223) is provided on the other, and the other end abuts against the abutting end surface (51).

13. The optical detection lens module according to claim 1, characterized in that: The position detection component (30) comprises an assembly seat (31) and a sensor (32) connected to the assembly seat (31); the assembly seat (31) is connected to the objective lens assembly structure (10).

14. The optical detection lens module according to claim 13, characterized in that: The position detection assembly (30) further comprises an adjustment seat (33) and a locking member (35), wherein the adjustment seat (33) is movably connected to the assembly seat (31), and the sensor (32) is connected to the adjustment seat (33); The adjustment seat (33) can move relative to the assembly seat (31) along the optical axis direction, the sensor (32) moves synchronously, and the locking member (35) is used to lock the adjustment seat (33) to the assembly seat (31).

15. An optical detection device, characterized in that: include: A light source module, used for emitting illumination light to the object to be tested; An imaging module, comprising an imaging lens and a camera, wherein the imaging lens is the optical detection lens module according to any one of claims 1 to 14; and A controller is communicatively connected with the position detection component (30) and is used to receive a detection signal from the position detection component (30) to determine whether the optical detection lens module is pre-collision.

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