Parallel coaxial light source and visual inspection system

Abstract

The utility model relates to the technical field of light source devices, and particularly discloses a parallel coaxial light source and a visual inspection system. One end of the Z-shaped shell is provided with a connecting sleeve and a locking bolt; the connecting sleeve is used for inserting the luminous body; the locking bolt is arranged on the connecting sleeve and is used for locking the luminous body; and the optical lens group is arranged in the Z-shaped shell body. According to the parallel coaxial light source and the visual inspection system provided by the utility model, the problem that the distance between the luminous body and the optical lens group cannot be adjusted can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of light source devices, in particular to a parallel coaxial light source and a visual detection system. Background Art

[0002] The parallel coaxial light source is a special light source, which is mainly used for detection and lighting in the field of machine vision. The emitted light of the parallel coaxial light source is more parallel and brighter than the traditional light source, and can effectively overcome the interference caused by the reflection of the surface of the object, while highlighting the unevenness of the surface of the object, so it is widely used in various surface defect detection scenarios.

[0003] In existing parallel coaxial light sources, the distance between the light source and the optical lens group is fixed and cannot meet the needs of diverse detection scenarios.

[0004] Therefore, it is necessary to improve the existing parallel coaxial light source to solve the problem that the distance between the light source and the optical lens assembly cannot be adjusted.

[0005] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0006] One purpose of the utility model is to provide a parallel coaxial light source and a visual detection system, which can effectively solve the problem that the distance between the light source and the optical lens group cannot be adjusted.

[0007] To achieve the above objectives, on the one hand, the utility model provides a parallel coaxial light source, comprising:

[0008] Luminous body;

[0009] A Z-shaped housing, one end of which is provided with a connecting sleeve for inserting the luminous body, and a locking bolt installed on the connecting sleeve and used to lock the luminous body;

[0010] An optical lens assembly is installed inside the Z-shaped housing.

[0011] Optionally, the connecting sleeve is provided with a threaded hole and is screwed together with the locking bolt.

[0012] Optionally, a Z-shaped space is provided inside the Z-shaped housing, and the optical lens assembly is located in the Z-shaped space.

[0013] Optionally, the Z-shaped space includes a first lateral space close to the light-emitting body, a second lateral space located lower than the first lateral space, and a longitudinal space connecting the first lateral space and the second lateral space.

[0014] Optionally, the optical lens assembly includes:

[0015] A lens assembly, wherein the lens assembly is located in the first transverse space and is used for converging the light emitted by the light source to form a parallel light beam.

[0016] Optionally, the optical lens assembly further includes:

[0017] a first total reflection mirror, which is obliquely installed at the intersection of the first transverse space and the longitudinal space, and is used to reflect the parallel light beam to the intersection of the longitudinal space and the second transverse space;

[0018] A second total reflection mirror is installed obliquely at the intersection of the longitudinal space and the second transverse space, and is used for reflecting the parallel light beam to an end of the second transverse space away from the longitudinal space.

[0019] Optionally, the optical lens assembly further includes:

[0020] A semi-transparent and semi-reflective mirror is installed at one end of the second transverse space away from the longitudinal space and is arranged parallel to the second total reflection mirror.

[0021] Optionally, an upper light-transmitting hole is provided at a position of the Z-shaped shell just above the semi-transparent and semi-reflective mirror, and a lower light-transmitting hole is provided at a position of the Z-shaped shell just below the semi-transparent and semi-reflective mirror.

[0022] Optionally, a vertical light absorbing plate is provided at an end surface of the second transverse space away from one end of the longitudinal space.

[0023] On the other hand, a visual inspection system is provided, comprising any of the parallel coaxial light sources described above, and a camera module for acquiring image information of a workpiece to be inspected.

[0024] The beneficial effects of the utility model are: providing a parallel coaxial light source and a visual inspection system, after the light-emitting body is inserted into the connecting sleeve, the locking bolt is tightened to achieve the relative positioning of the light-emitting body and the Z-shaped shell; when it is necessary to adjust the distance between the light-emitting body and the optical lens group, the locking bolt is first loosened, and then the insertion depth of the light-emitting body in the connecting sleeve is adjusted as needed, and after the adjustment is completed, the locking bolt is tightened again to fix the light-emitting body, thereby completing the distance adjustment operation between the light-emitting body and the optical lens group.

[0025] Therefore, the parallel coaxial light source and visual inspection system provided by the utility model can effectively solve the problem that the distance between the light source and the optical lens group cannot be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A schematic diagram of the structure of a visual inspection system provided in an embodiment.

[0028] In the figure:

[0029] 100. Workpiece to be tested;

[0030] 200, camera module;

[0031] 1. Luminous body;

[0032] 2. Z-shaped housing; 201. first transverse space; 202. second transverse space; 203. longitudinal space; 204. upper light-transmitting hole; 205. lower light-transmitting hole; 206. connecting sleeve; 207. locking bolt;

[0033] 3. Optical lens group; 301. Lens lens group; 302. First total reflection mirror; 303. Second total reflection mirror; 304. Semi-transparent and semi-reflective mirror;

[0034] 4. Light-absorbing board. DETAILED DESCRIPTION

[0035] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The word "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present invention, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0036] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which the present invention belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit the present invention.

[0037] In the description of the present invention, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in a logical relationship of "or".

[0038] In the present invention, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0039] Without further restrictions, in the present invention, the words "include", "comprises", "has" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0040] Similar to the understanding in the Examination Guidelines, in the present invention, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of the present invention, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0041] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0042] Unless otherwise expressly specified or limited, in the description of the embodiments of the present utility model, the terms "install", "connect", "connect", "fix", "set" and the like used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated 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 elements or the interaction relationship between two elements. For those skilled in the technical field of the present utility model, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to the specific circumstances.

[0043] The utility model provides a parallel coaxial light source and a visual inspection system, which are suitable for application scenarios of visual inspection of workpieces to be inspected, and can effectively solve the problem that the distance size between the light source and the optical lens group cannot be adjusted.

[0044] See also Figure 1 The visual inspection system includes a parallel coaxial light source for illuminating the workpiece 100 to be inspected, and a camera module 200 for acquiring image information of the workpiece 100 to be inspected.

[0045] The parallel coaxial light source comprises a light emitting body 1 , a Z-shaped housing 2 , and an optical lens assembly 3 .

[0046] Optionally, the light emitting body 1 is a high-brightness point light source.

[0047] One end of the Z-shaped housing 2 is provided with a connecting sleeve 206 for inserting the light-emitting body 1, and a locking bolt 207 mounted on the connecting sleeve 206 and used to lock the light-emitting body 1; wherein the connecting sleeve 206 is provided with a threaded hole and is screwed with the locking bolt 207. Furthermore, a Z-shaped space is provided inside the Z-shaped housing 2, and the optical lens assembly 3 is located in the Z-shaped space.

[0048] The parallel coaxial light source and visual inspection system provided in this embodiment, after the light-emitting body 1 is inserted into the connecting sleeve 206, the locking bolt 207 is tightened to achieve the relative positioning of the light-emitting body 1 and the Z-shaped shell 2; when it is necessary to adjust the distance between the light-emitting body 1 and the optical lens group 3, the locking bolt 207 is first loosened, and then the insertion depth of the light-emitting body 1 in the connecting sleeve 206 is adjusted as needed. After the adjustment is completed, the locking bolt 207 is tightened again to fix the light-emitting body 1, and the distance adjustment operation between the light-emitting body 1 and the optical lens group 3 is completed.

[0049] Therefore, the parallel coaxial light source and visual detection system provided by the present invention can effectively solve the problem that the distance between the light source 1 and the optical lens group 3 cannot be adjusted.

[0050] In this embodiment, the Z-shaped space includes a first lateral space 201 close to the light source 1 , a second lateral space 202 located lower than the first lateral space 201 , and a longitudinal space 203 connecting the first lateral space 201 and the second lateral space 202 .

[0051] The optical lens assembly 3 includes a lens assembly 301 , a first total reflection mirror 302 , a second total reflection mirror 303 , and a semi-transparent mirror 304 .

[0052] The lens assembly 301 is located in the first transverse space 201, and is used to converge the light emitted by the light source 1 to form a parallel light beam. The first total reflection mirror 302 is installed obliquely at the intersection of the first transverse space 201 and the longitudinal space 203, and is used to reflect the parallel light beam to the intersection of the longitudinal space 203 and the second transverse space 202. The second total reflection mirror 303 is installed obliquely at the intersection of the longitudinal space 203 and the second transverse space 202, and is used to reflect the parallel light beam to the end of the second transverse space 202 away from the longitudinal space 203. The semi-transparent and semi-reflective mirror 304 is installed at the end of the second transverse space 202 away from the longitudinal space 203, and is arranged parallel to the second total reflection mirror 303. A vertical light absorption plate 4 is provided at the end surface of the second transverse space 202 away from the longitudinal space 203.

[0053] Furthermore, the Z-shaped shell 2 is provided with an upper light-transmitting hole 204 at a position directly above the semi-transparent and semi-reflective mirror 304 , and the Z-shaped shell 2 is provided with a lower light-transmitting hole 205 at a position directly below the semi-transparent and semi-reflective mirror 304 .

[0054] When inspection is required, the workpiece 100 to be inspected is placed below the lower light-transmitting hole 205, and the camera module 200 is arranged above the upper light-transmitting hole 204. The light-emitting body 1 focuses light through the lens group 301 to form a parallel light beam, which is then reflected by the first total reflection mirror 302 and the second total reflection mirror 303 to the semi-transparent mirror 304 in sequence, and then reflected downward from the semi-transparent mirror 304 to the workpiece 100 to illuminate the workpiece 100 to be inspected; the light reflected by the illuminated workpiece 100 to be inspected penetrates the semi-transparent mirror 304 and is upwardly acquired by the camera module 200, thereby the camera module 200 can be used to acquire image information of the workpiece 100 to complete the visual inspection operation.

[0055] In summary, the parallel coaxial light source and visual inspection system provided in this embodiment have the following advantages: after the light-emitting body 1 is inserted into the connecting sleeve 206, the locking bolt 207 is tightened to achieve the relative positioning of the light-emitting body 1 and the Z-shaped shell 2; when it is necessary to adjust the distance between the light-emitting body 1 and the optical lens group 3, the locking bolt 207 is first loosened, and then the insertion depth of the light-emitting body 1 in the connecting sleeve 206 is adjusted as needed. After the adjustment is completed, the locking bolt 207 is tightened again to fix the light-emitting body 1, thereby completing the distance adjustment operation between the light-emitting body 1 and the optical lens group 3.

[0056] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A parallel coaxial light source, characterized in that: include: Luminous body (1); A Z-shaped shell (2), one end of the Z-shaped shell (2) being provided with a connecting sleeve (206) for inserting the light-emitting body (1), and a locking bolt (207) mounted on the connecting sleeve (206) and used for locking the light-emitting body (1); An optical lens assembly (3), wherein the optical lens assembly (3) is installed inside the Z-shaped housing (2).

2. The parallel coaxial light source according to claim 1, characterized in that: The connecting sleeve (206) is provided with a threaded hole and is screwed together with the locking bolt (207).

3. The parallel coaxial light source according to claim 1, characterized in that: A Z-shaped space is provided inside the Z-shaped housing (2), and the optical lens assembly (3) is located in the Z-shaped space.

4. The parallel coaxial light source according to claim 3, characterized in that: The Z-shaped space comprises a first lateral space (201) close to the light source (1), a second lateral space (202) located lower than the first lateral space (201), and a longitudinal space (203) connecting the first lateral space (201) and the second lateral space (202).

5. The parallel coaxial light source according to claim 4, characterized in that: The optical lens assembly (3) comprises: A lens assembly (301), the lens assembly (301) being located in the first transverse space (201) and being used for converging the light emitted by the light source (1) into a parallel light beam.

6. The parallel coaxial light source according to claim 5, characterized in that: The optical lens assembly (3) further comprises: a first total reflection mirror (302), the first total reflection mirror (302) being installed obliquely at the intersection of the first transverse space (201) and the longitudinal space (203), and being used to reflect the parallel light beam to the intersection of the longitudinal space (203) and the second transverse space (202); A second total reflection mirror (303), the second total reflection mirror (303) is installed obliquely at the intersection of the longitudinal space (203) and the second transverse space (202), and is used to reflect the parallel light beam to an end of the second transverse space (202) away from the longitudinal space (203).

7. The parallel coaxial light source according to claim 6, characterized in that: The optical lens assembly (3) further comprises: A semi-transparent and semi-reflective mirror (304), wherein the semi-transparent and semi-reflective mirror (304) is installed at an end of the second transverse space (202) away from the longitudinal space (203), and is arranged parallel to the second total reflection mirror (303).

8. The parallel coaxial light source according to claim 7, characterized in that: The Z-shaped shell (2) is provided with an upper light-transmitting hole (204) at a position directly above the semi-transparent and semi-reflective mirror (304), and the Z-shaped shell (2) is provided with a lower light-transmitting hole (205) at a position directly below the semi-transparent and semi-reflective mirror (304).

9. The parallel coaxial light source according to claim 7, characterized in that: A vertical light absorbing plate (4) is provided at an end surface of the second transverse space (202) away from one end of the longitudinal space (203).

10. A visual inspection system, characterized in that: It comprises the parallel coaxial light source as claimed in any one of claims 1 to 9, and a camera module (200) for acquiring image information of a workpiece to be measured (100).

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