Combined coaxial light source device
By superimposing dual coaxial light sources and using a prism module design, the problem of multi-angle imaging in machine vision inspection was solved, achieving multi-angle uniform illumination and high-precision imaging, thus improving the inspection effect and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG AOPUTE TECH CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-05
AI Technical Summary
In current machine vision inspection, a single coaxial light source cannot meet the needs of multi-angle inspection, resulting in poor imaging effect and efficiency.
It adopts a dual coaxial light source superposition design, combined with a prism module, to achieve uniform illumination from multiple angles. The optical path structure is optimized through a lens clamping device and a control module to ensure optical path stability and imaging accuracy.
It significantly improves the imaging details and detection accuracy of complex workpieces, simplifies the optical path structure, avoids image misalignment, and enhances detection stability and applicability.
Smart Images
Figure CN224203550U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machine vision technology, and in particular to a combined coaxial light source device. Background Technology
[0002] In machine vision inspection, coaxial light sources are widely used because they can provide uniform illumination and reduce glare interference. However, existing technologies typically employ a single coaxial light source, which has a single optical path and cannot simultaneously meet the needs of multi-angle inspection, resulting in poor imaging quality and efficiency. Therefore, improvements to existing technologies are needed.
[0003] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content
[0004] This invention provides a combined coaxial light source device to solve the problems existing in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A combined coaxial light source device, comprising:
[0007] A light source housing, wherein an accommodating space is formed within the light source housing;
[0008] The first and second coaxial light sources are symmetrically arranged inside the light source housing;
[0009] A prism module is disposed between the first coaxial light source and the second coaxial light source, including a beam-splitting reflective prism and a support structure. The diagonal surfaces of the beam-splitting reflective prism are coated with a beam-splitting film, and the bottom surface is coated with a reflective film.
[0010] An imaging device, including a camera and a lens, is used to receive light signals from the prism module;
[0011] A detection window is provided on each of the opposite sides of the housing of the light source. The emitted light from the first coaxial light source and the second coaxial light source is emitted through the prism module along a corresponding detection window.
[0012] Optionally, the combined coaxial light source device further includes a lens clamping device, which is adjustablely mounted on the light source housing to accommodate and fix lenses of different sizes.
[0013] Optionally, the light source housing includes a mounting plate and two opposing side plates disposed on the mounting plate;
[0014] The lens clamping device includes a lead screw, an optical axis connected between the two side plates, two slides disposed on the lead screw and the optical axis, and an elastic element disposed on the slides;
[0015] The lead screw is used to drive the slide to move along the optical axis to adjust the clamping distance between the two elastic elements.
[0016] Optionally, the opposing surfaces of the two elastic elements have concave surfaces, and the cross-sectional shape of the concave surfaces is "V" shaped or arc-shaped.
[0017] Optionally, the lead screw is provided with an adjustment handle, which is used to drive the lead screw to move when it is rotated, so as to drive the drive slide to move along the optical axis.
[0018] Optionally, the clamping surface of the elastic element is provided with an anti-slip texture.
[0019] Optionally, the support structure is a prism base, and the prism module includes a beam-splitting and reflecting prism disposed within the prism base.
[0020] Optionally, the ratio of the transmittance to the reflectance of the beam-splitting film is 1:1.
[0021] Optionally, the combined coaxial light source device further includes a control module, which is used to independently adjust the brightness and exposure sequence of the first coaxial light source and the second coaxial light source, and synchronize with the acquisition signal of the camera.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] This utility model provides a combined coaxial light source device that achieves multi-angle uniform illumination by coaxially superimposing two light sources, significantly improving the imaging details of complex workpieces. The design of the prism module simplifies the optical path structure and avoids image misalignment caused by the separation of multiple optical paths.
[0024] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description
[0025] 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.
[0026] Figure 1 This is an exploded view of a combined coaxial light source device provided by this utility model;
[0027] Figure 2 This is a schematic diagram of the structure of a combined coaxial light source device provided by this utility model;
[0028] Figure 3 This is a schematic diagram of the optical path of a combined coaxial light source device provided by this utility model;
[0029] Figure 4 This is a schematic diagram of the combined coaxial light source device provided by this utility model from another perspective.
[0030] Reference numerals: 10, Light source housing; 101, Mounting plate; 11, Side plate; 12, Lead screw; 121, Slide; 122, Elastic element; 123, Optical axis; 13, Adjustment handle; 21, First coaxial light source; 22, Second coaxial light source; 30, Prism module; 31, Beam splitting and reflecting prism; 311, Beam splitting film; 312, Reflective film; 32, Prism base; 33, Prism cover plate; 40, Imaging device; 41, Camera; 42, Lens; 50, Workpiece. Detailed Implementation
[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.
[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. 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 application, 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.
[0033] 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 application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.
[0034] In the description of this application, 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 " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.
[0035] In this application, 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 relationship between these entities or operations.
[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application 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 list 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.
[0037] Similar to the understanding in the Examination Guidelines, in this application, 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 in this application, "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.
[0038] In the description of the embodiments of this application, 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 purpose of describing the specific embodiments of this application 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 application.
[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, 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 application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0040] Please refer to the reference. Figures 1 to 4 This utility model provides a combined coaxial light source device, including: a light source housing 10, and an accommodating space formed inside the light source housing 10;
[0041] The first coaxial light source 21 and the second coaxial light source 22 are symmetrically arranged inside the light source housing 10;
[0042] The prism module 30 is located between the first coaxial light source 21 and the second coaxial light source 22, and includes a beam-splitting reflective prism 31 and a support structure. The diagonal surface of the beam-splitting reflective prism 31 is coated with a beam-splitting film 311, and the bottom surface is coated with a reflective film 312.
[0043] Imaging device 40 includes camera 41 and lens 42 for receiving light signals from prism module 30;
[0044] A detection window is opened on each of the opposite sides of the light source housing 10. The emitted light from the first coaxial light source 21 and the second coaxial light source 22 is emitted through the prism module 30 along the corresponding detection window.
[0045] In this embodiment, by integrating the first coaxial light source 21 and the second coaxial light source 22, which are symmetrically arranged to form a complementary optical path, and in conjunction with the design of the beam splitting film 311 and the reflective film 312 of the beam splitting and reflecting prism 31 in the prism module 30, the emitted light from the two light sources is directed to the detection windows on both sides of the light source housing 10, thereby achieving synchronous illumination of the two workpieces.
[0046] The camera 41 and lens 42 of the imaging device 40 receive the light signal integrated by the prism module 30, and simultaneously capture the surface details and body contour of the workpiece, solving the problem of shadow occlusion or loss of details under single light source illumination, and significantly improving the detection accuracy.
[0047] In optical path A, the light emitted by the first coaxial light source 21 illuminates the surface of the workpiece 50, is reflected along optical path A, passes through the beam-splitting lens of the first coaxial light source 21, and reaches the diagonal beam-splitting surface of the beam-splitting prism 31. 50% of the light passes through the beam-splitting film 311 and enters the lens 42, while the remaining 50% of the light is reflected by the beam-splitting film 311. In optical path B, the light emitted by the second coaxial light source 22 illuminates the surface of the workpiece 50, is reflected along optical path B, passes through the beam-splitting lens of the second coaxial light source 22, and reaches the diagonal beam-splitting surface of the beam-splitting prism 31. 50% of the light passes through the beam-splitting film 311, while the remaining 50% of the light is reflected by the beam-splitting film 311 to the reflective film 312 at the bottom of the beam-splitting prism 31. After total internal reflection, the light reaches the beam-splitting surface again, and the final 50% of the reflected light enters the lens 42.
[0048] Furthermore, the combined coaxial light source device also includes a lens clamping device, which is adjustable and mounted on the light source housing 10 to accommodate and fix lenses 42 of different sizes.
[0049] In this embodiment, an adjustable design is used to adapt to lenses 42 of different sizes through an elastic clamping structure, thereby expanding the applicability of the device without changing the hardware. At the same time, it ensures that the lens 42 is coaxially aligned with the optical path, avoiding imaging distortion caused by lens offset and enhancing detection stability.
[0050] Furthermore, the light source housing 10 includes a mounting plate 101 and two opposing side plates 11 disposed on the mounting plate 101;
[0051] The lens clamping device includes a lead screw 12 connected between two side plates 11, an optical axis 123, two slides 121 provided on the lead screw 12 and the optical axis 123, and an elastic element 122 provided on the slides;
[0052] The lead screw 12 is used to drive the slide 121 to move along the optical axis 123 to adjust the clamping distance between the two elastic elements 122.
[0053] The two elastic elements 122 have concave surfaces on their opposite sides, and the cross-sectional shape of the concave surfaces is "V" shaped or arc-shaped.
[0054] In this embodiment, the mounting plate 101 and the side plate 11 provide rigid support for the light source housing 10. The transmission system composed of the lead screw 12 and the optical axis 123 drives the elastic element 122 to move along the linear track through the slide block 121. The thread precision of the lead screw 12 is used to achieve micro-adjustment, ensuring uniform change of the clamping distance and avoiding errors caused by manual adjustment. The symmetrical design of the elastic element 122 further disperses the clamping pressure and prevents the lens 42 from being damaged due to excessive local force.
[0055] Furthermore, the lead screw 12 is provided with an adjustment handle 13, which is used to drive the lead screw 12 to move when it is rotated, so as to drive the drive slide 121 to move along the optical axis 123.
[0056] The direct linkage between the adjustment handle 13 and the lead screw 12 simplifies the operation process. The displacement of the slide 121 can be precisely controlled by rotating the handle, making the clamping and adjustment of the lens 42 more convenient and efficient. It is especially suitable for testing scenarios where lenses are frequently changed. At the same time, the anti-slip design of the handle enhances the stability and safety of the operation.
[0057] Furthermore, the clamping surface of the elastic element 122 is provided with anti-slip texture to increase contact friction. Combined with the deformation characteristics of the elastic material, it not only ensures the firmness of the clamping, but also avoids scratches on the lens surface that may be caused by rigid clamping.
[0058] Furthermore, the supporting structure is a prism base 32, and the prism module 30 includes a beam-splitting and reflecting prism 31 disposed within the prism base 32, and a prism cover plate 33 disposed on top of the beam-splitting and reflecting prism 31. The fixed connection between the base and the outer shell further enhances the stability of the optical path and reduces the impact of external vibrations on the imaging quality.
[0059] Furthermore, the transmittance to reflectance ratio of the beam splitter 311 is 1:1. Under this ratio, the light intensity of the first coaxial light source 21 and the second coaxial light source 22 is evenly distributed within the prism module 30, avoiding excessive intensity of one light source that could cause local overexposure of the image. At the same time, it ensures that the brightness is uniform after the two light signals are superimposed in the imaging device 40, providing a clear image with high contrast for subsequent image analysis.
[0060] Furthermore, the combined coaxial light source device also includes a control module. The control module is used to independently adjust the brightness and exposure timing of the first coaxial light source 21 and the second coaxial light source 22, and synchronize them with the acquisition signal of the camera 41. By independently adjusting the brightness and exposure timing of the two light sources and synchronizing them with the acquisition signal of the camera 41, the control module enhances the adaptability and robustness of the detection system, meeting the diverse needs of complex industrial scenarios.
[0061] 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 combined coaxial light source device, characterized in that, include: A light source housing (10) has an accommodating space inside it; The first coaxial light source (21) and the second coaxial light source (22) are symmetrically arranged inside the light source housing (10); The prism module (30) is located between the first coaxial light source (21) and the second coaxial light source (22), and includes a beam-splitting reflector prism (31) and a support structure. The diagonal surface of the beam-splitting reflector prism (31) is coated with a beam-splitting film (311), and the bottom surface is coated with a reflective film (312). The imaging device (40) includes a camera (41) and a lens (42) for receiving light signals from the prism module (30); A detection window is provided on each of the opposite sides of the housing (10) of the light source. The emitted light from the first coaxial light source (21) and the second coaxial light source (22) is emitted through the prism module (30) along the corresponding detection window.
2. The combined coaxial light source device according to claim 1, characterized in that, It also includes a lens clamping device, which is adjustable and located on the light source housing (10) to accommodate and fix lenses (42) of different sizes.
3. The combined coaxial light source device according to claim 2, characterized in that, The light source housing (10) includes a mounting plate (101) and two opposing side plates (11) disposed on the mounting plate (101). The lens clamping device includes a lead screw (12) connected between the two side plates (11), an optical axis (123), two slides (121) provided on the lead screw (12) and the optical axis (123), and an elastic element (122) provided on the slides. The lead screw (12) is used to drive the slide (121) to move along the optical axis (123) to adjust the clamping distance between the two elastic elements (122).
4. The combined coaxial light source device according to claim 3, characterized in that, The opposing surfaces of the two elastic elements (122) have concave surfaces, the cross-sectional shape of which is "V" or arc.
5. The combined coaxial light source device according to claim 3, characterized in that, The lead screw (12) is provided with an adjustment handle (13), which is used to drive the lead screw (12) to move when it is rotated, so as to drive the drive slide (121) to move along the optical axis (123).
6. The combined coaxial light source device according to claim 3, characterized in that, The clamping surface of the elastic element (122) is provided with anti-slip texture.
7. The combined coaxial light source device according to claim 1, characterized in that, The supporting structure is a prism base (32), and the prism module (30) includes a beam-splitting and reflecting prism (31) disposed in the prism base (32).
8. The combined coaxial light source device according to claim 1, characterized in that, The transmittance to reflectance ratio of the beam splitter (311) is 1:
1.
9. The combined coaxial light source device according to claim 1, characterized in that, It also includes a control module, which is used to independently adjust the brightness and exposure timing of the first coaxial light source (21) and the second coaxial light source (22), and synchronize with the acquisition signal of the camera (41).