A dustproof coaxial light source and detection device

Abstract

The utility model relates to the technical field of light sources, and discloses a dustproof coaxial light source and detection device, comprising: a housing; a light source, installed in the housing, for emitting light in a first direction; a spectroscope, installed at the outlet end of the light source, and inclined 45° relative to the first direction; a first dustproof lens and a second dustproof lens installed obliquely on the housing, respectively arranged on the top side and the bottom side of the spectroscope, so as to cooperate with the housing to seal the spectroscope in the housing. The dustproof coaxial light source and detection device of the utility model can further reduce the light interference to the detection camera.

Description

Technical Field

[0001] The utility model relates to the technical field of light sources, in particular to a dustproof coaxial light source and a detection device. Background Art

[0002] At present, dust-proof lenses are generally added to the upper and lower windows of coaxial light sources to prevent dust or objects from entering the light source and interfering with the imaging effect. However, the existing dust-proof lenses are mostly placed horizontally, and the lenses are coated with anti-reflection films, which will cause dust to easily accumulate on the horizontally placed dust-proof lenses, affecting the reflection effect, causing light interference, and thus affecting the accuracy of camera detection; in addition, the horizontally placed dust-proof lenses are prone to reflecting irrelevant images into the camera, further interfering with the imaging.

[0003] In view of this, it is necessary to design a dustproof coaxial light source and a detection device to further reduce the degree of light interference.

[0004] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content

[0005] The utility model provides a dustproof coaxial light source and a detection device to further reduce the degree of light interference.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A dustproof coaxial light source, comprising:

[0008] case;

[0009] A light source, installed in the housing, for emitting light in a first direction;

[0010] A beam splitter, mounted at the exit end of the light source and inclined 45° relative to the first direction;

[0011] A first dustproof lens and a second dustproof lens installed obliquely on the shell are respectively arranged on the top side and the bottom side of the beam splitter to cooperate with the shell to seal the beam splitter in the shell.

[0012] Optionally, the first dust-proof lens-increasing sheet is parallel to the beam splitter, and the second dust-proof lens-increasing sheet is perpendicular to the beam splitter.

[0013] Optionally, the housing has a first supporting portion, and the first supporting portion is directly opposite to the first dust-proof lens-enhancing sheet, and a first light-absorbing layer is arranged on a first side surface of the first supporting portion close to the first dust-proof lens-enhancing sheet;

[0014] The housing has a second supporting portion, and the second supporting portion is directly opposite to the second dust-proof lens-enhancing sheet. A second light-absorbing layer is arranged on a second side surface of the second supporting portion close to the first dust-proof lens-enhancing sheet.

[0015] Optionally, the housing forms a light exit channel extending along the first direction, and the light exit channel is directly opposite to a light blocking portion, and a third light absorbing layer is provided on the light blocking portion;

[0016] The beam splitter is located between the light blocking portion and the light exit channel.

[0017] Optionally, the first dust-proof lens-increasing sheet is located between the light-blocking portion and the first supporting portion, and the second dust-proof lens-increasing sheet is located between the light-blocking portion and the second supporting portion.

[0018] Optionally, the shell forms a vertical detection channel, and the first dust-proof lens-increasing lens, the beam splitter and the second dust-proof lens-increasing lens are sequentially arranged in the vertical detection channel from top to bottom.

[0019] Optionally, the first light absorbing layer is a light absorbing coating.

[0020] Optionally, a diffusion plate is installed in the light output channel.

[0021] Optionally, the light source includes a circuit board, a heat dissipation device and a plurality of lamp beads mounted on the circuit board, and the heat dissipation device is mounted on a side of the circuit board away from the lamp beads and contacts the circuit board.

[0022] A detection device, comprising the dustproof coaxial light source and a detection camera as described in any one of the above items, wherein the detection camera is facing the first dustproof lens;

[0023] The light from the light source is reflected by the beam splitter and passes through the second dust-proof lens to illuminate the surface of the workpiece. The reflected light from the workpiece passes through the second dust-proof lens, the beam splitter and the first dust-proof lens in sequence to enter the lens of the detection camera.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The utility model provides a dust-proof coaxial light source and detection device, which forms a closed space by obliquely installing a first dust-proof lens and a second dust-proof lens on a shell, and seals a spectroscope in the shell, thereby reducing the susceptibility of the spectroscope to the influence of foreign dust and other impurities; in addition, the first dust-proof lens and the second dust-proof lens are obliquely arranged, which can reduce the possibility of dust accumulation and the degree of interference from external stray light.

[0026] The present invention has other characteristics and advantages, which will be apparent from the accompanying drawings and subsequent specific embodiments incorporated herein, or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 work.

[0028] Figure 1 It is a schematic diagram of the cross-sectional structure of the dustproof coaxial light source provided by an embodiment of the utility model.

[0029] Figure numerals: 1. Shell; 11. Light output channel; 101. First supporting part; 102. Second supporting part; 103. Light blocking part; 2. Light source; 21. Circuit board; 22. Heat dissipation device; 23. Lamp beads; 3. Beam splitter; 4. First dust-proof and lens increasing lens; 5. Second dust-proof and lens increasing lens; 6. First light absorbing layer; 7. Second light absorbing layer; 8. Third light absorbing layer; 9. Diffuser plate; 100. Inspection camera; 200. Workpiece. DETAILED DESCRIPTION

[0030] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Reference to "embodiment" herein 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 application. The term "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 application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0032] 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 this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0033] In the description of this application, 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 an "or" logical relationship.

[0034] In the present application, 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.

[0035] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the 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.

[0036] Similar to the understanding in the Examination Guidelines, in this application, 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 this application, "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.

[0037] In the description of the embodiments of the present application, 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 application 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 application.

[0038] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. 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 it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] Embodiment 1

[0040] In view of the defects of the existing coaxial light sources, the applicant has actively conducted research and innovation based on many years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of academic theory, in the hope of creating a technology that can solve the defects in the existing technology and make the dust-proof coaxial light source more practical. After continuous research and design, and after repeated trial production and improvement, the present utility model with real practical value was finally created.

[0041] Please refer to Figure 1 The embodiment of the utility model provides a dustproof coaxial light source, including: a shell 1; a light source 2, installed in the shell 1, for emitting light along a first direction; a spectroscope 3, installed at the outlet end of the light source 2, and inclined 45° relative to the first direction; the spectroscope 3 refracts the light emitted by the light source 2 toward the workpiece 200, illuminating the periphery of the workpiece 200, and the light reflected by the workpiece 200 can pass through the spectroscope 3 and enter the detection camera 100.

[0042] The first dustproof lens 4 and the second dustproof lens 5 installed obliquely on the housing 1 are respectively arranged on the top side and the bottom side of the beam splitter 3 to cooperate with the housing 1 to seal the beam splitter 3 in the housing 1.

[0043] It should be noted that the protection of the first dust-proof lens 4, the second dust-proof lens 5 and the housing 1 can place the spectroscope 3 in a closed space, avoiding the influence of external dust and other impurities, which is beneficial to improving the accuracy of imaging. In addition, the first dust-proof lens 4 and the second dust-proof lens 5, which are arranged obliquely, can reduce the amount of external stray light directed in the set direction, thereby helping to reduce the stray light received by the detection camera 100 and effectively reducing light interference. In addition, it should be noted that the first dust-proof lens 4 and the second dust-proof lens 5, which are obliquely installed on the housing 1, are also not easy to accumulate dust, which is also beneficial to reduce the amount of stray light entering the detection camera 100 and improve the detection accuracy.

[0044] Optionally, the first dust-proof lens-increasing sheet 4 is parallel to the beam splitter 3 , and the second dust-proof lens-increasing sheet 5 is perpendicular to the beam splitter 3 .

[0045] Optionally, the housing 1 has a first support portion 101, and the first support portion 101 is directly opposite to the first dust-proof lens 4, and a first light-absorbing layer 6 is arranged on the first side of the first support portion 101 close to the first dust-proof lens 4; the housing 1 has a second support portion 102, and the second support portion 102 is directly opposite to the second dust-proof lens 5, and a second light-absorbing layer 7 is arranged on the second side of the second support portion 102 close to the first dust-proof lens 4. Specifically, the provision of the first light-absorbing layer 6 reduces the stray light refracted from the first support portion 101 to the detection camera 100, that is, the stray light image of the first support portion 101 will not be refracted to the detection camera 100 through the first dust-proof lens 4; the provision of the second light-absorbing layer 7 reduces the stray light refracted from the second support portion 102 to the detection camera 100, that is, the stray light on the second support portion 102 will not be reflected to the second dust-proof lens 5 and sequentially pass through the beam splitter 3 and the first dust-proof lens 4 to enter the detection camera, thereby effectively reducing light interference.

[0046] Optionally, the housing 1 forms a light exit channel 11 extending along the first direction, and the light exit channel 11 is directly opposite to the light blocking portion 103, and the light blocking portion 103 is provided with a third light absorbing layer 8; the beam splitter 3 is located between the light blocking portion 103 and the light exit channel 11. Figure 1 As shown, the light-emitting channel 11 is used for light to be emitted to the beam splitter 3, and then the beam splitter 3 refracts the light to the workpiece 100 and illuminates the workpiece. In this embodiment, the first direction is a horizontal direction, and the light-emitting channel 11 extends horizontally.

[0047] Optionally, the first dustproof lens increasing lens 4 is located between the light shielding portion 103 and the first supporting portion 101, and the second dustproof lens increasing lens 5 is located between the light shielding portion 103 and the second supporting portion 102. In this embodiment, one end of the first dustproof lens increasing lens 4 is clamped in the clamping groove of the first supporting portion 101, and the other end is fixed on the light shielding portion 103; one end of the second dustproof lens increasing lens 5 is clamped in the clamping groove of the second supporting portion 102, and the other end is fixed on the light shielding portion 103. It should also be noted that the light shielding portion 103 is a part of the housing 1.

[0048] Optionally, the housing 1 forms a vertical detection channel, and the first dust-proof lens 4, the beam splitter 3 and the second dust-proof lens 5 are sequentially arranged in the vertical detection channel from top to bottom. The vertical detection channel is used for detection by the detection camera, and the vertical detection channel is an optical channel. Figure 1 It can be known that the light reflected by the workpiece 100 passes through the second dust-proof lens 5 , the beam splitter 3 and the first dust-proof lens 4 in sequence and enters the detection camera 100 to form an image.

[0049] Optionally, the first light-absorbing layer 6 is a light-absorbing coating, preferably a black light-absorbing coating, which prevents light from being disposed on the first support portion 101, thereby preventing the image of the first support portion 101 from being refracted into the detection camera 100 through the first dust-proof lens 4, thereby reducing light interference.

[0050] Optionally, a diffusion plate 9 is installed in the light exit channel 11 to make the light irradiated on the workpiece 100 more uniform.

[0051] It should be noted that the first light absorbing layer 6 is a light absorbing plate, which includes a plate body and a light absorbing coating on a plate surface on one side of the plate body; an adhesive layer is provided on the plate surface of the light absorbing plate away from the light absorbing coating.

[0052] Optionally, the light source 2 includes a circuit board 21 , a heat sink 22 , and a plurality of lamp beads 23 mounted on the circuit board 21 . The heat sink 22 is mounted on a side of the circuit board 21 away from the lamp beads 23 and contacts the circuit board 21 .

[0053] Embodiment 2

[0054] The present embodiment discloses a detection device, comprising the dustproof coaxial light source and the detection camera 100 of the first embodiment, and the detection camera 100 is facing the first dustproof lens 4; the light from the light source 2 is reflected by the beam splitter 3 and passes through the second dustproof lens 5 to irradiate the surface of the workpiece 200, and the reflected light from the workpiece 200 passes through the second dustproof lens 5, the beam splitter 3 and the first dustproof lens 4 in sequence to enter the lens of the detection camera 100.

[0055] 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 dustproof coaxial light source, characterized in that: include: Housing (1); A light source (2) is installed in the housing (1) and is used to emit light in a first direction; A beam splitter (3) mounted at the exit end of the light source (2) and inclined at 45° relative to the first direction; A first dust-proof lens (4) obliquely mounted on the housing (1) and a second dust-proof lens (5) obliquely mounted on the housing (1) are respectively arranged on the top side and the bottom side of the beam splitter (3) to cooperate with the housing (1) to enclose the beam splitter (3) in the housing (1).

2. The dustproof coaxial light source according to claim 1, characterized in that: The first dust-proof lens-increasing sheet (4) is parallel to the beam splitter (3), and the second dust-proof lens-increasing sheet (5) is perpendicular to the beam splitter (3).

3. The dustproof coaxial light source according to claim 2, characterized in that: The housing (1) has a first supporting portion (101), and the first supporting portion (101) is directly opposite to the first dust-proof lens-enhancing sheet (4), and a first light-absorbing layer (6) is provided on a first side surface of the first supporting portion (101) close to the first dust-proof lens-enhancing sheet (4); The shell (1) has a second supporting portion (102), and the second supporting portion (102) is directly opposite to the second dust-proof lens-enhancing sheet (5), and a second light-absorbing layer (7) is provided on a second side surface of the second supporting portion (102) close to the first dust-proof lens-enhancing sheet (4).

4. The dustproof coaxial light source according to claim 3, characterized in that: The housing (1) forms a light exit channel (11) extending along a first direction, and the light exit channel (11) is directly opposite to a light blocking portion (103), and a third light absorbing layer (8) is provided on the light blocking portion (103); The beam splitter (3) is located between the light blocking portion (103) and the light exit channel (11).

5. The dustproof coaxial light source according to claim 4, characterized in that: The first dust-proof lens-enhancing sheet (4) is located between the light-blocking portion (103) and the first supporting portion (101), and the second dust-proof lens-enhancing sheet (5) is located between the light-blocking portion (103) and the second supporting portion (102).

6. The dustproof coaxial light source according to claim 1, characterized in that: The housing (1) forms a vertical detection channel, and the first dust-proof lens-increasing sheet (4), the beam splitter (3) and the second dust-proof lens-increasing sheet (5) are arranged in sequence from top to bottom in the vertical detection channel.

7. The dustproof coaxial light source according to claim 3, characterized in that: The first light absorbing layer (6) is a light absorbing coating.

8. The dustproof coaxial light source according to claim 4, characterized in that: A diffusion plate (9) is installed in the light exit channel (11).

9. The dustproof coaxial light source according to claim 1, characterized in that: The light source (2) comprises a circuit board (21), a heat sink (22), and a plurality of lamp beads (23) mounted on the circuit board (21); the heat sink (22) is mounted on a side of the circuit board (21) away from the lamp beads (23) and contacts the circuit board (21).

10. A detection device, characterized in that: It comprises a dustproof coaxial light source and a detection camera (100) as claimed in any one of claims 1 to 9, and the detection camera (100) is facing the first dustproof lens-enhancing film (4); Light from the light source (2) is reflected by the beam splitter (3) and passes through the second dust-proof lens (5) to irradiate the surface of the workpiece (200), and the reflected light from the workpiece (200) passes through the second dust-proof lens (5), the beam splitter (3) and the first dust-proof lens (4) in sequence to enter the lens of the detection camera (100).

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