Coaxial light source with adjustable rotating angle

Abstract

The coaxial light source comprises a shell, a beam splitter, a light source assembly and a locking piece, an illumination channel of the shell is provided with an incidence section and a reflection section which are perpendicular to each other, and an incidence opening communicated with the illumination channel is formed in the end, away from the reflection section, of the incidence section; the end, away from the incidence section, of the reflection section is provided with an emission opening communicating with the illumination channel. The beam splitter is mounted in the illumination channel, one end of the beam splitter is connected with the inner wall, facing the exit, of the incident section, and the other end of the beam splitter obliquely extends by 45 degrees in the direction close to the exit; the light source assembly is installed at the incidence opening of the shell and can slide in the extending direction of the incidence section, and the irradiation end of the light source assembly is located in the illumination channel. The locking piece is connected with the shell and acts on the light source assembly, so that the light source assembly and the shell are relatively fixed; in this way, the far and near illumination focuses of the light emitted by the light source assembly can be adjusted, and the light supplementing requirements of different measured objects are met.

Description

Technical Field

[0001] The utility model relates to the technical field of detecting light sources, in particular to a coaxial light source with adjustable rotation angle. Background Art

[0002] With the rapid development of industrial automation, machine vision inspection has become a popular industry, widely used in industries such as circuit boards, printing, screens, and product surface defects. Machine vision systems include light sources, which are used to supplement the illumination of the object being measured. Among various light sources, angled coaxial light sources are widely used due to their high brightness and good uniformity.

[0003] In the system application of visual inspection light sources, the distance between the input light source of the corner coaxial light source and the beam splitter is often fixed. In this way, the focus of the light in the area of the object to be measured that needs to be supplemented with light is also fixed. If the object to be measured is changed (for example, the outer contour of the object to be measured is larger) or the area of the object to be measured that needs to be supplemented with light is changed, a different light source must be set up to meet the supplementary light requirements of the object to be measured. This makes the application range of the corner coaxial light source small and cannot meet the supplementary light requirements of a variety of objects to be measured. Therefore, improvement is urgently needed. Utility Model Content

[0004] The main purpose of the utility model is to provide an adjustable angle coaxial light source to solve the problem that the angle coaxial light source in the related art is not compatible with the fill light requirements of various objects to be measured.

[0005] To achieve the above objectives, the present invention provides an adjustable angle coaxial light source, comprising: a housing having a light channel, the light channel having an incident section and a reflecting section arranged perpendicular to each other, an incident port disposed at an end of the incident section away from the reflecting section, and an emission port disposed in communication with the light channel, the reflecting section having an end away from the incident section.

[0006] A beam splitter is installed in the light channel, one end of the beam splitter is connected to the inner wall of the incident section facing the emission port, and the other end of the beam splitter is extended at a 45-degree angle toward the emission port;

[0007] a light source assembly, mounted at the incident port of the housing and slidable along the extending direction of the incident section, the illumination end of the light source assembly being located within the illumination channel;

[0008] A locking member is connected to the housing and acts on the light source assembly to fix the light source assembly relative to the housing.

[0009] In some embodiments, the housing is provided with an annular boss around the edge of the incident port, and the light source assembly is slidably connected to the inner peripheral wall of the annular boss.

[0010] In some embodiments, a threaded hole is provided through the outer peripheral wall of the annular boss, and the locking member is a bolt, which is threadedly connected to the threaded hole to press against the outer surface of the light source assembly.

[0011] In some embodiments, a plurality of threaded holes are provided on the outer peripheral wall of the annular boss, and the threaded holes are spaced apart along the outer peripheral wall of the annular boss.

[0012] In some embodiments, the light source assembly includes a light source part and an adapter tube, the adapter tube is sleeved on the outer peripheral wall of the light source part, and a first annular rib is provided at one end of the adapter tube located in the incident port, and the outer contour of the first annular rib is larger than the outer contour of the incident port.

[0013] In some embodiments, the outer peripheral wall of the adapter tube is provided with a limiting groove extending along its length direction, and the shell is also provided with a positioning hole connected to the light channel at a position corresponding to the limiting groove, and the adjustable angle coaxial light source also includes a positioning column, which is inserted into the positioning hole and at least partially extends into the limiting groove.

[0014] In some embodiments, the light source includes a light holder, a circuit light board, and a power connection cable. The circuit light board is installed at one end of the light holder and is located in the lighting channel. The light holder is provided with a wire hole, and the power connection cable passes through the wire hole to be electrically connected to the circuit light board.

[0015] In some embodiments, a second annular rib is provided at one end of the lamp holder located outside the incident section, and the outer contour of the second annular rib is larger than the outer contour of the incident port.

[0016] In some embodiments, the inner wall of the illumination channel is provided with two mounting grooves, and the two ends of the beam splitter are respectively inserted into the two mounting grooves.

[0017] In some embodiments, the adjustable angle coaxial light source further includes a Fresnel lens, which is disposed in the illumination channel and located between the beam splitter and the incident port.

[0018] The beneficial effects of the technical solution of this utility model are:

[0019] The adjustable angle coaxial light source of the utility model is provided with a light source assembly that can slide along the extension direction of the incident section at the incident port of the illumination channel of the shell, so that the light source illumination end of the light source assembly can be moved in the direction close to or away from the beam splitter, and a locking member is provided to lock the light source assembly, so that the illumination focus of the light emitted by the light source assembly can be adjusted to meet the fill light requirements of different objects to be measured, thereby making the adjustable angle coaxial light source highly compatible, and facilitating the user to fill light for different objects to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an adjustable angle coaxial light source according to an embodiment of the present utility model;

[0021] Figure 2 This is an exploded view of the structure of the adjustable angle coaxial light source according to an embodiment of the utility model;

[0022] Figure 3 This is a cross-sectional view of an adjustable angle coaxial light source according to an embodiment of the present utility model;

[0023] Figure 4 for Figure 1 Schematic diagram of the structure of the middle shell;

[0024] Figure 5 for Figure 1 Schematic diagram of the structure of the light source component.

[0025] Description of Figure Numbers:

[0026] 100. Shell; 110. Illumination channel; 120. Incident section; 121. Incident port; 130. Reflection section; 131. Ejection port; 140. Annular boss; 141. Threaded hole; 150. Positioning hole; 160. Mounting slot; 200. Beam splitter; 300. Light source assembly; 310. Light source component; 311. Light holder; 312. Circuit light board; 313. Power cable; 314. Wire hole; 315. Second annular rib; 320. Adapter tube; 321. First annular rib; 322. Limiting groove; 400. Locking member; 500. Positioning column; 600. Fresnel lens. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0028] In view of the technical defects in the related art, the present invention provides an adjustable angle coaxial light source. Figures 1 to 5 The adjustable angle coaxial light source includes: a shell 100, a beam splitter 200, a light source assembly 300 and a locking member 400. Among them, the shell 100 serves as a supporting component for the various components of the adjustable angle coaxial light source. It can be assembled by plates, or can be made of plastic injection molding, or can be made of other materials, which is not specifically limited here.

[0029] The housing 100 has an illumination channel 110, which includes an incident section 120 and a reflective section 130 arranged perpendicular to each other. The length of the incident section 120 can be greater than or less than the length of the reflective section 130. The lengths of the incident section 120 and the reflective section 130 are not specifically limited herein. Furthermore, the incident section 120 and the reflective section 130 can be arranged in a cylindrical strip shape or other strip shapes. In this embodiment, the incident section 120 and the reflective section 130 are arranged in a rectangular strip shape, facilitating the construction of the housing 100 using plate-like structural components.

[0030] Furthermore, an incident port 121 communicating with the illumination channel 110 is provided at one end of the incident section 120 away from the reflecting section 130, and an emission port 131 communicating with the illumination channel 110 is provided at one end of the reflecting section 130 away from the incident section 120; a beam splitter 200 is installed in the illumination channel 110, one end of the beam splitter 200 is connected to the inner wall of the incident section 120 facing the emission port 131, and the other end of the beam splitter 200 is extended at a 45-degree angle toward the emission port 131; a light source assembly 300 is installed in the incident port 121 of the housing 100 and can slide along the extension direction of the incident section 120, and the irradiation end of the light source assembly 300 is located in the illumination channel 110;

[0031] In this way, the object under test located at the emission port 131 is illuminated by the irradiation end of the light source assembly 300 through the reflection of the beam splitter 200, and due to the action of the beam splitter 200, the object under test can eliminate the shadow caused by the uneven surface of the object under the illumination of the light source assembly 300, thereby reducing interference. The beam splitter 200 is provided to reduce light loss and improve the imaging clarity of the detection camera; and the light emitted by the light source assembly 300 can obtain light coaxial with the lens of the detection camera after passing through the beam splitter 200, which can suppress the ghosting caused by reflection and thus improve the imaging clarity.

[0032] In addition, since the light source assembly 300 can slide along the extension direction of the incident section 120, the light focus of the light emitted by the light source assembly 300 can be adjusted to meet the fill light requirements of different objects to be measured. For example, when it is necessary to illuminate and image the outer contour of the object to be measured, the light source assembly 300 can slide along the extension direction of the incident section 120 toward the direction away from the reflective section 130, so that the focus of the light irradiating the object to be measured is dispersed to the outer contour of the object to be measured, so that the outer contour of the object to be measured can be clearly reflected, which is convenient for the detection camera to capture the outer contour; for example, when it is necessary to illuminate and image the surface scratches of the object to be measured, the light source assembly 300 can slide along the extension direction of the incident section 120 toward the direction close to the reflective section 130, so that the focus of the light irradiating the object to be measured is concentrated on the surface of the object to be measured and the outer contour of the object to be measured is ignored. This makes the scratches on the upper surface of the object to be measured more clearly reflected, which is convenient for the detection camera to capture the surface scratches.

[0033] In addition, the locking member 400 is connected to the housing 100 and acts on the light source assembly 300 to fix the light source assembly 300 relative to the housing 100. By providing the locking member 400, the light source assembly 300 can be slid along the extension direction of the incident section 120 to fix the light source assembly 300, preventing the light source assembly 300 from moving when illuminating the same object under test.

[0034] It should be noted that there may be various structures provided by the locking member 400 to fix the light source assembly 300. For example, the locking member 400 is a latch, and the outer peripheral wall of the light source assembly 300 is provided with a plurality of recessed holes arranged at intervals along its sliding direction. The shell 100 is provided with through holes at positions corresponding to the recessed holes. The latch passes through the through holes and cooperates with the corresponding recessed holes to relatively fix the light source assembly 300 on the shell 100. For another example, the locking member 400 is a bolt, and the shell 100 is provided with a threaded hole 141. The bolt is threadedly connected to the threaded hole 141 to press against the outer peripheral wall of the light source assembly 300 so that the light source assembly 300 is relatively fixed on the shell 100. The structure provided by the locking member 400 to fix the light source assembly 300 may also be other, which is not specifically limited here.

[0035] Through the above technical solution, the adjustable angle coaxial light source is provided with a light source assembly 300 that can slide along the extension direction of the incident section 120 at the incident port 121 of the illumination channel 110 of its shell 100, so that the light source illumination end of the light source assembly 300 can move toward or away from the beam splitter 200, and a locking member 400 is provided to lock the light source assembly 300, so that the illumination focus of the light emitted by the light source assembly 300 can be adjusted to meet the fill light requirements of different objects to be measured, thereby making the adjustable angle coaxial light source highly compatible, and convenient for users to fill light for different objects to be measured.

[0036] To ensure that the light source assembly 300 slides stably and securely at the port of the incident port 121, in this embodiment, the housing 100 is provided with an annular boss 140 around the edge of the incident port 121, and the light source assembly 300 is slidably connected to the inner circumferential wall of the annular boss 140. By adding the annular boss 140, the sliding contact area between the light source assembly 300 and the incident port 121 can be increased, thereby ensuring that the light source assembly 300 slides stably and securely.

[0037] In this embodiment, a threaded hole 141 is provided through the outer wall of the annular boss 140. The locking member 400 is a bolt that is threadedly engaged with the threaded hole 141 to abut against the outer surface of the light source assembly 300. With this arrangement, when the light source assembly 300 needs to be slidably adjusted, the bolt is loosened, the light source assembly 300 is manually slid to a position that meets the lighting requirements, and then the bolt is tightened to fix the light source assembly 300 relative to the housing 100.

[0038] In some embodiments, the outer wall of the annular boss 140 is provided with multiple threaded holes 141, and the threaded holes 141 are spaced apart along the outer wall of the annular boss 140. In this way, multiple bolts can be provided to be threadedly connected to corresponding threaded holes 141. The multiple bolts work together to press against the outer surface of the light source assembly 300, thereby increasing the fixing force and preventing the light source assembly 300 from moving due to insufficient pressure from a single bolt.

[0039] See also Figure 2 and Figure 5 In this embodiment, the light source assembly 300 includes a light source component 310 and an adapter tube 320. The adapter tube 320 is sleeved onto the outer peripheral wall of the light source component 310. A first annular rib 321 is provided at one end of the adapter tube 320 located within the incident port 121. The outer contour of the first annular rib 321 is larger than the outer contour of the incident port 121. By providing the first annular rib 321 at one end of the adapter tube 320, the end surface of the first annular rib 321 facing the incident port 121 can abut against the inner edge of the incident port 121, thereby preventing the light source assembly 300 from being separated from the incident port 121.

[0040] Furthermore, to prevent the light source assembly 300 from rotating within the incident section 120, in this embodiment, the outer peripheral wall of the adapter tube 320 is provided with a limiting groove 322 extending along its length. The housing 100 is also provided with a positioning hole 150 communicating with the illumination channel 110 at a position corresponding to the limiting groove 322. The adjustable angle coaxial light source also includes a positioning post 500, which is inserted into the positioning hole 150 and at least partially extends into the limiting groove 322. In this way, the side surface of the positioning post 500 abuts against the two groove walls of the limiting groove 322, thereby preventing the light source assembly 300 from rotating.

[0041] Furthermore, the illuminating end of the light source 310 is located within the illumination channel 110. To facilitate electrical connection of the illuminating end of the light source 310, in this embodiment, the light source 310 includes a light base 311, a circuit light board 312, and a power cable 313. The circuit light board 312 is mounted at one end of the light base 311 and located within the illumination channel 110. The light base 311 is provided with a cable hole 314, through which the power cable 313 is electrically connected to the circuit light board 312. This arrangement allows the cable to be electrically connected to the circuit light board 312 through the cable hole 314, ensuring that the circuit light board 312 can be powered and emit light.

[0042] In addition, considering that the light source assembly 300 is slidably installed at the incident port 121, the light source assembly 300 is limited by the first annular rib 321 when it moves in the direction away from the reflective section 130, while the light source assembly 300 is not limited when it slides in the direction close to the reflective section 130. The light source assembly 300 can easily fall off from the incident port 121 to the inside of the incident section 120. In view of this, in order to prevent the light source assembly 300 from falling into the incident section 120, in this embodiment, a second annular rib 315 is provided at one end of the lamp holder 311 located on the outside of the incident section 120, and the outer contour of the second annular rib 315 is larger than the outer contour of the incident port 121.

[0043] To facilitate installation of the beam splitter 200 , in some embodiments, two mounting grooves 160 are recessed into the inner wall of the illumination channel 110 , and two ends of the beam splitter 200 are respectively inserted into the two mounting grooves 160 .

[0044] Furthermore, in some embodiments, the adjustable angle coaxial light source also includes a Fresnel lens 600, which is disposed within the illumination channel 110 and between the beam splitter 200 and the incident port 121. The Fresnel lens 600 is a thin lens made of polyolefin material, with a surface pattern of concentric circles arranged from small to large. This design is based on the principles of light interference and diffraction, as well as requirements for relative sensitivity and reception angle. The primary function of the Fresnel lens 600 is to improve light focusing efficiency. The Fresnel lens 600 can converge the light emitted by the light source assembly 300, generating a higher light intensity and thus improving light focusing efficiency.

[0045] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A coaxial light source with adjustable angle, characterized in that: The adjustable angle coaxial light source comprises: The housing (100) has a light channel (110), wherein the light channel (110) has an incident section (120) and a reflective section (130) arranged perpendicular to each other, wherein an incident port (121) communicating with the light channel (110) is provided at one end of the incident section (120) away from the reflective section (130), and an emission port (131) communicating with the light channel (110) is provided at one end of the reflective section (130) away from the incident section (120); A beam splitter (200) is installed in the illumination channel (110), one end of the beam splitter (200) is connected to the inner wall of the incident section (120) facing the emission port (131), and the other end of the beam splitter (200) is extended at a 45-degree angle toward the emission port (131); a light source assembly (300) mounted on the incident port (121) of the housing (100) and slidable along the extending direction of the incident section (120), wherein the irradiation end of the light source assembly (300) is located in the illumination channel (110); A locking member (400) is connected to the housing (100) and acts on the light source assembly (300) to fix the light source assembly (300) relative to the housing (100).

2. The adjustable angle coaxial light source according to claim 1, characterized in that: The housing (100) is provided with an annular boss (140) around the edge of the incident port (121), and the light source assembly (300) is slidably connected to the inner peripheral wall of the annular boss (140).

3. The adjustable angle coaxial light source according to claim 2, characterized in that: A threaded hole (141) is provided through the outer peripheral wall of the annular boss (140); the locking member (400) is a bolt, and the bolt is threadedly connected to the threaded hole (141) to abut against the outer surface of the light source assembly (300).

4. The adjustable angle coaxial light source according to claim 3, characterized in that: There are a plurality of threaded holes (141) provided on the outer peripheral wall of the annular boss (140), and the threaded holes (141) are arranged at intervals along the outer peripheral wall of the annular boss (140).

5. The adjustable angle coaxial light source according to claim 1, characterized in that: The light source assembly (300) comprises a light source component (310) and an adapter tube (320), wherein the adapter tube (320) is sleeved on the outer peripheral wall of the light source component (310), and a first annular convex rib (321) is provided at one end of the adapter tube (320) located in the incident port (121), wherein the outer contour of the first annular convex rib (321) is larger than the outer contour of the incident port (121).

6. The adjustable angle coaxial light source according to claim 5, characterized in that: The outer peripheral wall of the adapter tube (320) is provided with a limiting groove (322) extending along its length direction; the housing (100) is further provided with a positioning hole (150) communicating with the illumination channel (110) at a position corresponding to the limiting groove (322); the adjustable angle coaxial light source further comprises a positioning column (500); the positioning column (500) is plugged into the positioning hole (150) and at least partially extends into the limiting groove (322).

7. The adjustable angle coaxial light source according to claim 5, characterized in that: The light source component (310) comprises a light socket (311), a circuit light board (312), and a power connection cable (313); the circuit light board (312) is mounted on one end of the light socket (311) and is located in the illumination channel (110); the light socket (311) is provided with a wire hole (314); the power connection cable (313) passes through the wire hole (314) and is electrically connected to the circuit light board (312).

8. The adjustable angle coaxial light source according to claim 7, characterized in that: A second annular rib (315) is provided at one end of the lamp holder (311) located outside the incident section (120), and the outer contour of the second annular rib (315) is larger than the outer contour of the incident port (121).

9. The adjustable angle coaxial light source according to claim 1, characterized in that: Two mounting grooves (160) are recessed on the inner wall of the illumination channel (110), and the two ends of the beam splitter (200) are respectively inserted into the two mounting grooves (160).

10. The angle-adjustable coaxial light source according to claim 1, characterized in that: The adjustable angle coaxial light source further comprises a Fresnel lens (600), which is arranged in the illumination channel (110) and located between the beam splitter (200) and the incident port (121).

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