Multi-angle detection prism module and optical detection device

Abstract

The utility model relates to optical equipment technical field, specifically disclose a multi -angle detection prism module and optical detection device, include: prism casing, enclose and form the light -transmitting passage, flat mirror group includes a plurality of flat reflection prisms that surround the main optical axis is arranged in the circumferential array, tilt mirror group includes a plurality of tilt reflection prisms that surround the main optical axis is arranged in the circumferential array, wherein, the flat reflection prism is used for the hole wall light of the hole piece of measurement to tilt reflection to corresponding tilt reflection prism, the tilt reflection prism is used for the light reflection into the off -axis light beam parallel with the main optical axis, and then, outwardly emits. The multi -angle detection prism module and optical detection device provided by the utility model can assist to realize multi -angle shooting, and it is favorable to reduce the detection cost, improve the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of optical equipment technology, and in particular to a multi-angle detection prism module and optical detection device. Background Technology

[0002] In the field of mechanical manufacturing, the integrity of screw holes (such as thread wear, hole wall cracks, foreign matter residue, etc.) directly affects assembly quality. Current manual visual inspection or optical imaging inspection methods have the following shortcomings:

[0003] Manual inspection requires checking each direction sequentially, including adjusting the position and angle of the screw holes one by one. This process is time-consuming and inefficient. Furthermore, manual judgment cannot be strictly performed according to standards and is influenced by personal subjective opinions, resulting in inconsistent inspection standards.

[0004] In optical imaging inspection solutions, each camera can only capture images from a single angle. This requires adjusting the shooting angle of a single camera multiple times or using multiple cameras with different angles to capture images simultaneously, which is costly and difficult to meet the production cycle requirements of the production line.

[0005] Therefore, this utility model is dedicated to developing a prism module to meet the multi-angle shooting needs of a single camera, thereby reducing detection costs and improving detection efficiency.

[0006] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] One objective of this invention is to provide a multi-angle detection prism module and optical detection device, which can assist in multi-angle imaging, thereby reducing detection costs and improving detection efficiency.

[0008] To achieve the above objectives, this utility model provides a multi-angle detection prism module, comprising:

[0009] A prism housing, which encloses and forms a light-transmitting channel; the light-transmitting channel has an inlet end and an outlet end extending along the main optical axis;

[0010] A flat mirror assembly, located at the light-inlet end, comprising a plurality of flat mirror prisms arranged in a circumferential array around the main optical axis;

[0011] An inclined mirror assembly, located at the light-emitting end, includes a plurality of inclined mirrors arranged in a circumferential array around the main optical axis;

[0012] The flat reflecting prism is used to obliquely reflect the light rays from the hole wall of the test hole located outside the light-emitting end to the corresponding oblique reflecting prism.

[0013] The tilting reflector is used to reflect the light reflected by the corresponding straight reflector into an off-axis beam parallel to the principal optical axis, and then emit the off-axis beam outward through the light-emitting end.

[0014] Optionally, the normal of each of the flat reflecting prisms is perpendicular to the principal optical axis.

[0015] Optionally, the distance from each of the tilted reflecting prisms to the main optical axis gradually increases from the light-inlet end to the light-outlet end.

[0016] Optionally, the ends of each of the tilted reflecting prisms near the light-inlet end are enclosed to form a central axis hole, through which the light rays from the bottom of the hole to be tested pass through the light-transmitting channel.

[0017] Optionally, the number of the flat reflecting prism and the tilting reflecting prism are equal, and they are arranged in a one-to-one correspondence.

[0018] Optionally, the number of both the flat reflecting prism and the tilting reflecting prism is 6 or 8.

[0019] On the other hand, an optical detection device is provided, including any of the multi-angle detection prism modules and a camera located at the light-emitting end of the multi-angle detection prism module.

[0020] Optionally, the camera is an area scan camera.

[0021] Optionally, a telecentric lens is provided between the area array camera and the multi-angle detection prism module.

[0022] The beneficial effects of this invention are as follows: It provides a multi-angle detection prism module and optical detection device. By combining a straight reflecting prism (capturing light at different angles) and a tilting reflecting prism (converting light into parallel light in the same direction), the reflected light from multiple angles of the sidewall of the object under test is integrated into multiple off-axis beams parallel to the principal optical axis. Furthermore, the multiple off-axis beams emitted from the light-emitting end can be simultaneously captured by a single camera lens, thereby enabling the acquisition of multi-angle images in a single shot without adjusting the camera angle or using multiple cameras.

[0023] Therefore, the multi-angle detection prism module and optical detection device provided by this utility model can assist in realizing multi-angle shooting, which is conducive to reducing detection costs and improving detection efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the optical detection device provided in the embodiment;

[0026] Figure 2 A cross-sectional schematic diagram of the optical detection device provided in the embodiment;

[0027] Figure 3 Off-axis beam path diagram of the multi-angle detection prism module provided in the embodiment;

[0028] Figure 4 A top view of the flat mirror assembly provided in the embodiment;

[0029] Figure 5 A top view of the tilting mirror assembly provided in the embodiment.

[0030] In the picture:

[0031] 100. The hole to be tested;

[0032] 1. Multi-angle detection prism module; 101. Prism housing; 1011. Light inlet end; 1012. Light outlet end; 102. Flat mirror assembly; 1021. Flat reflecting prism; 103. Tilted mirror assembly; 1031. Tilted reflecting prism;

[0033] 2. Area scan camera;

[0034] 3. Telecentric lens;

[0035] 4. Central shaft hole. Detailed Implementation

[0036] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0037] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0038] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0039] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0040] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0041] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0042] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0043] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0044] The direct drive mechanism in this invention can be a linear motor, a cylinder, a hydraulic cylinder, or a motor lead screw and slider assembly, etc.; the rotary drive mechanism can be a servo motor, a stepper motor, or a rotary cylinder, etc.

[0045] This embodiment provides a multi-angle detection prism module and optical detection device to achieve multi-angle shooting with a single camera, thereby reducing detection costs and improving detection efficiency.

[0046] See Figures 1-3 In this embodiment, the optical detection device includes a multi-angle detection prism module 1 and a camera for acquiring image information of the hole wall and bottom of the hole component 100 to be tested through the multi-angle detection prism module 1.

[0047] In this embodiment, the multi-angle detection prism module 1 includes:

[0048] A prism housing 101 is formed to enclose a light-transmitting channel; the light-transmitting channel has an inlet end 1011 and an outlet end 1012 extending along the main optical axis; wherein, the camera is located on the side where the outlet end 1012 of the prism housing 101 is located.

[0049] A flat mirror assembly 102, located at the light-entry end 1011, includes a plurality of flat mirror prisms 1021 arranged in a circumferential array around the main optical axis.

[0050] The tilted mirror group 103 is located at the light-emitting end 1012 and includes a plurality of tilted mirror 1031 arranged in a circumferential array around the main optical axis.

[0051] The flat reflecting prism 1021 is used to obliquely reflect the light rays from the aperture wall of the aperture 100 located outside the light-emitting end 1012 to the corresponding oblique reflecting prism 1031.

[0052] The tilted reflecting prism 1031 is used to reflect the light reflected by the corresponding straight reflecting prism 1021 into an off-axis beam parallel to the main optical axis, and then emit the off-axis beam outward through the light-emitting end 1012.

[0053] The multi-angle detection prism module 1 provided in this embodiment performs the following detection process:

[0054] S10: Light incident on the sidewall of the hole to be measured

[0055] Light from the hole wall (such as the screw hole side) of the hole to be tested 100 located outside the light-emitting end 1012 of the prism housing 101 enters the light-inlet end 1011 region.

[0056] S20: First reflection from flat reflecting prism 1021

[0057] The light is captured by a number of flat reflecting prisms 1021 arranged in a circumferential array around the principal optical axis in the flat reflecting mirror group 102.

[0058] Each flat reflecting prism 1021 obliquely reflects light from the sidewall at different angles to the corresponding oblique reflecting prism 1031 in the oblique reflecting mirror group 103.

[0059] Note: The function of the flat reflecting prism 1021 is to "fold" light rays from different spatial angles into the internal light path of the prism.

[0060] S30: Second reflection of tilted reflecting prism 1031

[0061] The tilted reflecting prism 1031 receives the light reflected from the corresponding straight reflecting prism 1021 and performs a secondary reflection on it.

[0062] After reflection, the light is converted into an off-axis beam parallel to the principal optical axis (i.e., the beam is parallel to the principal optical axis but has a spatial offset).

[0063] S40: Off-axis beam emission

[0064] The parallelized off-axis beam is transmitted to the light-emitting end 1012 through the light transmission channel and then emitted outward.

[0065] Ultimately, off-axis beams from all angles are emitted from the output end 1012, forming a spatially separated multi-path imaging optical path.

[0066] In summary, the multi-angle detection prism module 1 and optical detection device provided by this invention, through the cooperation of the flat reflecting prism 1021 (capturing light at different angles) and the tilting reflecting prism 1031 (converting light into parallel light in the same direction), integrate the reflected light from multiple angles of the sidewall of the object under test into multiple off-axis beams parallel to the principal optical axis. Furthermore, the multiple off-axis beams emitted from the light-emitting end 1012 can be simultaneously captured by a single camera lens, thereby achieving the acquisition of multi-angle images in a single shot without adjusting the camera angle or using multiple cameras.

[0067] Therefore, the multi-angle detection prism module 1 and optical detection device provided by this utility model can assist in realizing multi-angle shooting, which is conducive to reducing detection costs and improving detection efficiency.

[0068] Specifically, see Figure 4 The normals of each of the flat reflecting prisms 1021 are perpendicular to the principal optical axis; correspondingly, see... Figure 5 The distance from each of the tilted reflective prisms 1031 to the main optical axis gradually increases from the light-inlet end 1011 to the light-outlet end 1012.

[0069] Furthermore, the ends of each tilted reflective prism 1031 near the light-inlet end 1011 form a central axis hole 4, through which the light rays from the bottom of the hole of the test hole 100 pass through the light-transmitting channel.

[0070] Light from the bottom of the aperture is directly incident on the camera through the light transmission channel without reflection, achieving synchronous capture of light from the aperture wall and the bottom of the aperture, thus enhancing the comprehensiveness and completeness of the detection.

[0071] In this embodiment, the number of the flat reflecting prism 1021 and the tilting reflecting prism 1031 are equal, and they are arranged in a one-to-one correspondence. This ensures precise matching of the optical path, simplifies optical design, avoids light confusion or mismatch, and thus improves beam integration efficiency and imaging signal-to-noise ratio. Optionally, the number of both the flat reflecting prism 1021 and the tilting reflecting prism 1031 is 6 or 8.

[0072] In this embodiment, the camera is an area scan camera 2. The area scan camera 2 can adapt to the spatial separation characteristics of off-axis beams, efficiently capture multiple beams simultaneously, improve the efficiency and synchronization of image acquisition, and avoid detection errors caused by timing delays.

[0073] Furthermore, a telecentric lens 3 is provided between the area array camera 2 and the multi-angle detection prism module 1. The telecentric lens 3 can suppress beam distortion and scaling changes, ensure image size consistency, and enhance the accuracy and repeatability of detection.

[0074] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A multi-angle detection prism module, characterized in that, include: A prism housing (101) is formed to enclose a light-transmitting channel; The light-transmitting channel has an inlet end (1011) and an outlet end (1012) extending along the main optical axis. A flat mirror assembly (102) is located at the light-entry end (1011) and includes a plurality of flat mirror prisms (1021) arranged in a circumferential array around the main optical axis. An inclined mirror assembly (103) is located at the light-emitting end (1012) and includes a plurality of inclined mirror prisms (1031) arranged in a circumferential array around the main optical axis. The flat reflecting prism (1021) is used to obliquely reflect the light from the hole wall of the hole to be tested (100) located outside the light-emitting end (1012) to the corresponding oblique reflecting prism (1031). The tilted reflecting prism (1031) is used to reflect the light reflected by the corresponding flat reflecting prism (1021) into an off-axis beam parallel to the main optical axis, and then emit the off-axis beam outward through the light-emitting end (1012).

2. The multi-angle detection prism module according to claim 1, characterized in that, The normals of each of the flat reflecting prisms (1021) are perpendicular to the principal optical axis.

3. The multi-angle detection prism module according to claim 1, characterized in that, The distance between each of the tilted reflective prisms (1031) and the main optical axis gradually increases from the light-inlet end (1011) to the light-outlet end (1012).

4. The multi-angle detection prism module according to claim 3, characterized in that, Each of the tilted reflective prisms (1031) forms a central shaft hole (4) at one end near the light-inlet end (1011), and the light rays from the bottom of the hole of the test hole (100) pass through the light-transmitting channel via the central shaft hole (4).

5. The multi-angle detection prism module according to claim 1, characterized in that, The number of the flat reflecting prism (1021) and the tilting reflecting prism (1031) are equal, and they are arranged in a one-to-one correspondence.

6. The multi-angle detection prism module according to claim 5, characterized in that, The number of both the flat reflecting prism (1021) and the tilting reflecting prism (1031) is 6 or 8.

7. An optical detection device, characterized in that, It includes the multi-angle detection prism module (1) as described in any one of claims 1-6, and a camera located at the light-emitting end (1012) of the multi-angle detection prism module (1).

8. The optical detection device according to claim 7, characterized in that, The camera is an area array camera (2).

9. The optical detection device according to claim 8, characterized in that, A telecentric lens (3) is provided between the area array camera (2) and the multi-angle detection prism module (1).

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