CN216521064U - Uniform high-brightness annular light source structure - Google Patents
Uniform high-brightness annular light source structure Download PDFInfo
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- CN216521064U CN216521064U CN202220238283.3U CN202220238283U CN216521064U CN 216521064 U CN216521064 U CN 216521064U CN 202220238283 U CN202220238283 U CN 202220238283U CN 216521064 U CN216521064 U CN 216521064U
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Abstract
The utility model discloses a uniform high-brightness annular light source structure, which comprises a light source shell, wherein the top surface of the light source shell is provided with a light source upper cover plate; through holes are correspondingly formed in the middle parts of the light source shell and the light source upper cover plate, and the light source plates are spliced and installed on the bottom surface of the light source shell; the bottom surface of the light source shell is of a multi-bent annular inclined surface structure, and the bending angle of the light source shell needs to meet the requirement that the optical axis of a light source arranged on the light source shell points to the illumination central area; the light source plate comprises a reinforcing area and a soft plate area, a plurality of light source lamp beads are uniformly distributed on the reinforcing area, and the soft plate area can enable the light source plate to be attached to an inner cavity inclined plane of the light source shell body in a bending mode. The utility model solves the welding problem and the heat dissipation problem of the illumination by using the high-power surface-mounted light emitting diode while ensuring the uniform high-brightness illumination in the camera field of view.
Description
Technical Field
The utility model belongs to the technical field of optical and visual detection, and particularly relates to a uniform high-brightness annular light source structure.
Background
The product appearance defect detection device generally comprises an illumination light source, a light source controller, an industrial camera, a lens and image analysis processing software, wherein the illumination light source is used for showing defects on products. The basic principle for displaying defects is to highlight the difference in physical quantities perceptible to the human eye between the defective areas and the normal areas of the product in which the defects are located, typically differences in light intensity and differences in color. The good light source illumination can improve the image quality, improve the system resolution and provide ideal original input images for subsequent image processing.
The annular light source is a typical illumination light source in a machine vision system, provides 360-degree uniform shadowless illumination for an imaging module consisting of a camera and a lens, is usually coaxially arranged with the camera lens, can form an area with uniform illumination in an area away from the end face of the lens, reduces shadows caused by convex-concave surface of a measured product, and improves contrast. The annular light source is suitable for detecting the defects on the surface of a product, and is particularly suitable for detecting the defects on the uneven surface, such as the appearance defects of products such as metal mobile phone shell panel characters, IC plastic packaging silk screen printing, on-line electronic component surfaces, aluminum foil packaging of medical medicines, circuit boards, BGA (ball grid array packaging) and the like.
High resolution, large area product inspection typically requires a detection camera to rapidly scan the inspected object, with short exposure times being the most effective choice for the camera. However, the short exposure time results in insufficient image brightness due to the limitation of the response sensitivity of the camera, and if the method of increasing the gain of the camera is used, noise is increased, which affects the image quality. Therefore, the light source with high brightness is the best choice for matching the short exposure time image capture of the camera. While satisfying high-brightness illumination, the light source also needs to have sufficient brightness uniformity in the illumination area, which is beneficial to image processing.
The annular light source on the market at present mainly is LED, and high-power emitting diode is the surface mounting encapsulation, is favorable to the heat dissipation, and this kind of encapsulation needs to weld on the smooth annular circuit board of face type. However, this approach presents problems: in the central area of the annular light source, i.e. the image-taking field area of the camera, the area is not the area with the maximum illuminance, and the lighting efficiency of the light source is not high, i.e. most of the light energy falls in the area outside the camera field. The pin type light emitting diode can be welded by using a flexible circuit board to form a conical light emitting surface, so that the irradiation light intensity is concentrated in the central area of the ring, but the conical surface formed by the flexible substrate does not meet the welding requirement of a high-power surface-mounted packaged light emitting diode.
SUMMERY OF THE UTILITY MODEL
In view of one or more of the above deficiencies or needs in the art, the present invention provides a uniform high brightness annular light source structure that solves the problems of welding and heat dissipation using high power surface mount leds for illumination while ensuring uniform high brightness illumination within the field of view of the camera.
In order to achieve the above object, the present invention provides a uniform high brightness annular light source structure, which comprises a light source housing, a light source cover plate and a light source module, wherein the top surface of the light source housing is provided with the light source upper cover plate;
through holes are correspondingly formed in the middle parts of the light source shell and the light source upper cover plate, and the light source plates are spliced and installed on the bottom surface of the light source shell;
the bottom surface of the light source shell is of a multi-bent annular inclined surface structure, and the bending angle of the light source shell needs to meet the requirement that the optical axis of a light source arranged on the light source shell points to the illumination central area; the light source plate comprises a reinforcing area and a soft plate area, a plurality of light source lamp beads are uniformly distributed on the reinforcing area, and the soft plate area can enable the light source plate to be attached to an inner cavity inclined plane of the light source shell body in a bending mode.
As a further improvement of the utility model, the annular surface of the bottom surface of the light source shell is sequentially bent at certain intervals to form a plurality of fan-shaped areas.
As a further improvement of the utility model, the centers of the bottom surfaces of the light source shell are bent outwards at certain intervals in sequence, so that each sector area forms an annular shape from inside to outside, and the bending angle between adjacent rings of the same sector is in the range of 0-90 degrees.
As a further improvement of the utility model, the middle part of the light source plate is a soft plate area, the reinforcing areas are longitudinally distributed on two sides of the light source plate, and the soft plate area is also arranged between the reinforcing areas on the same side.
As a further improvement of the utility model, the quantity of the light source lamp beads in each reinforcing area on the same ring of different sectors is the same.
As a further improvement of the utility model, the light source lamp beads adopt the same or different spectral wave bands, and the light emitting wave bands of the light source lamp beads on different rings are the same or different; and the light source lamp beads can be controlled to emit light simultaneously or selectively according to time sequence according to different sectors and different rings.
As a further improvement of the utility model, the two light source plates are bent, combined and spliced into a 2-ring bead layout with 4 sectors; the number of light source lamp beads of each reinforcement area on the same ring of different sectors is 5, the first ring from the ring center to the outside is a blue light wave band, and the second ring is a red light wave band; the inner side of the light source shell is sequentially processed into two inclined planes of 15 degrees and 45 degrees from inside to outside, and the light source plate is attached to the inclined planes.
As a further improvement of the utility model, the side surface of the light source shell is milled with a plurality of heat dissipation teeth.
As a further improvement of the utility model, a light source interface board is arranged on the side of the light source shell, and a signal connector on the light source board is connected with the light source interface board through a wire.
As a further improvement of the utility model, the side surface of the light source shell is provided with a whole machine fixing hole.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) according to the uniform high-brightness annular light source structure, the bottom surface of the light source shell is provided with the multi-bent inclined surface structure, so that the irradiation angle of the lamp beads on the light source plate can be adjusted, the illuminance of the central area of the annular light source is improved, and the illumination efficiency is improved; and adopt the form of flexible sheet and local steel sheet reinforcement for lamp pearl on the board can the surface paste welding, and flexible region can be crooked, laminates with light source casing inner chamber inclined plane structure, makes light source lamp pearl optical axis that welds on it can point to illumination central zone, and many lamp pearls form the even illumination visual field in camera visual field center, and the lamp pearl surface of steel sheet reinforcement is pasted the weld zone and is the plane, is used for the lamp pearl welding and dispels the heat. The utility model solves the welding problem and the heat dissipation problem of the illumination of the high-power surface-mounted light-emitting diode while ensuring the uniform high-brightness illumination in the field of view of the camera
(2) According to the uniform high-brightness annular light source structure, the heat-conducting medium is filled in the reinforcing area, so that heat conduction is facilitated; the surface of the light source shell is anodized black, so that heat radiation and heat transfer are facilitated; the side face of the light source shell is milled with a plurality of radiating teeth, and heat radiation and heat conduction transfer heat to the radiating teeth, so that the performance and the service life of the light source can be improved.
Drawings
FIG. 1 is a schematic diagram of a uniform high brightness annular light source according to an embodiment of the present invention;
FIG. 2 is a schematic view of a light source board mounting structure of a uniform high brightness annular light source structure according to an embodiment of the utility model;
FIG. 3 is a cross-sectional view of a uniform high brightness annular light source according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a light source plate of a uniform high-brightness annular light source structure according to an embodiment of the utility model;
FIG. 5 is a schematic view of a uniform high brightness annular light source partition according to an embodiment of the present invention;
fig. 6 is a light source bead layout diagram of a uniform high-brightness annular light source structure according to an embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-light source shell, 2-light source upper cover plate, 3-heat dissipation teeth, 4-light source plate, 5-light source lamp beads, 6-light source plate fixing holes, 7-light source plate signal connector, 8-whole machine fixing holes, 9-wire passing holes, 10-light source cover, 11-light source interface plate, 12-reinforcing area and 13-soft plate area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
FIG. 1 is a schematic diagram of a uniform high brightness annular light source according to an embodiment of the present invention; FIG. 2 is a schematic view of a light source board mounting structure of a uniform high brightness annular light source structure according to an embodiment of the utility model; FIG. 3 is a cross-sectional view of a uniform high brightness annular light source according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a light source plate with a uniform high-brightness annular light source structure according to an embodiment of the utility model. As shown in fig. 1 to 4, the annular light source structure with uniform high brightness of the present invention includes a light source housing 1, a light source upper cover plate 2, heat dissipation teeth 3, a light source plate 4, light source lamp beads 5, light source plate fixing holes 6, a light source plate signal connector 7, a complete machine fixing hole 8, a wire passing hole 9, a light source cover 10, a light source interface board 11, etc.
Specifically, the light source housing 1 is preferably formed by processing aluminum materials, so that heat dissipation is facilitated, and the overall weight of the light source can be effectively reduced; the top surface of the light source shell 1 is provided with a light source upper cover plate 2, and the middle parts of the light source shell 1 and the light source upper cover plate 2 are correspondingly provided with through holes and sealed by a baffle plate for avoiding the visual angle of the lens. Preferably, the light source upper cover plate 2 is fixed to the light source housing 1 through screw holes correspondingly arranged at four corners.
The bottom surface of the light source shell 1 is of a multi-bending annular inclined plane structure, the annular surface of the light source shell is bent at certain intervals in sequence, the annular center of the light source shell is bent at certain intervals outwards in sequence, and a hood-shaped structure is integrally formed. The light source plate 4 is arranged on the bottom surface of the light source shell 1 and is attached to the inclined plane structure, the bending angle of the inclined plane of the light source shell 1 can be adjusted according to actual conditions, and only the requirement that the optical axis of a light source lamp bead welded on the light source plate can point to the lighting central area can be met; light source casing 1, light source upper cover plate 2 and light source board 4 form and seal the cavity, and the light source board outside still is equipped with light source cover 10 in addition for protect the part that sets up on the light source board.
As shown in fig. 4, the light source plate 4 includes a reinforcement region 12 and a soft plate region 13, the reinforcement region 12 is embedded in the soft plate region 13, the light source beads 5 are uniformly arranged on the reinforcement region 12, and the light source beads of the present invention preferably adopt high-power LED beads; the reinforcing area 12 is further provided with a plurality of light source plate fixing holes 6, and the light source plate 4 is fixed with the light source housing 1 through the corresponding fixing holes 6.
The flexible board region 13 is preferably an FPC flexible board, and can be bent, so that the light source board 4 is a bendable region in the flexible board region. The middle part of the light source plate 4 is a soft plate area, the reinforcing areas 12 are longitudinally distributed on two sides of the light source plate 4, and the light source lamp beads 5 are longitudinally distributed on the reinforcing areas 12; between the stiffening regions 12 on the same side are also soft plate regions. On one hand, the light source plate 4 can be bent along the middle soft plate area, so that the reinforcing areas on the two sides have a certain angle, the angle comprises the bending of the same plane and the bending of different planes, and the bending of different planes ensures that the reinforcing areas on the two sides are positioned on different planes; on the other hand can be along the regional bending of soft board between the homonymy reinforcement region 12, makes to have certain angle between the reinforcement region of homonymy, can laminate with 1 inner chamber inclined plane of light source casing after fixed to satisfy light source lamp pearl 5 and shine the angle demand.
The reinforcing area 12 is filled with a heat-conducting medium, so that heat conduction is facilitated; the surface of the light source shell 1 is anodized black, so that heat radiation and heat transfer are facilitated; in addition, a plurality of heat dissipation teeth 3 are milled on four side faces of the light source shell 1, heat radiation and heat conduction transfer heat to the heat dissipation teeth 3, and the light source is preferably dissipated through an external fan.
Further, a light source plate signal connector 7 is further arranged on the light source plate 4, a light source interface board 11 is arranged on the side edge of the light source shell 1, and the light source plate 4 is connected with the light source interface board 11 through a wire; specifically, the bottom of the light source housing 1 is provided with a wire through hole 9, and a wire is connected to the light source board signal connector 7 and passes through the wire through hole to be connected to the light source interface board 11. The light source interface board 11 is led out of the connector, so that the connection of a user is facilitated.
Further preferably, the lateral surface of the light source housing 1 is provided with a complete machine fixing hole 8, which is convenient for a user to assemble with other mechanisms.
The light source structure of the utility model is a circular ring or similar circular ring structure formed by splicing the light source plates 4, and comprises but is not limited to a square-shaped, rectangular-shaped, polygonal-shaped and the like. Fig. 5 is a schematic sectional view of a uniform high-brightness annular light source, wherein the light source is distributed according to V sector regions, each adjacent sector region is bent to form a plurality of planar regions, the plurality of sector regions form an annular shape, and the planar portions of the sector regions from the center of the ring to the outside form an annular shape from inside to outside. In the figure VijRepresenting the jth ring plane region in the ith sector, e.g. V in the drawing32Indicating the 2 nd ring plane area in sector 3.
The number of the light source lamp beads welded in each reinforcement area on the same ring of different sectors is the same, and the light-emitting wave bands of the light source lamp beads on different rings can be the same or different; the bending angle range between adjacent rings (between the reinforced areas) in the same sector is 0-90 degrees, and the reinforced areas in the same sector are not bent at 0 degree; however, it is within the scope of the present invention to achieve uniform light intensity distribution on a plane of the illuminated area when the light source beads on the same ring are simultaneously turned on.
In addition, based on the consideration of process machining and engineering application, the light source plate can be formed by splicing a plurality of independent units, and all the units are connected through cables or are respectively connected with the controller terminal.
The light source plate 4 can control the light source lamp beads to emit light simultaneously or selectively according to time sequence according to different sectors and different rings. The working mode of the light source can be that the single ring is lightened, or the inner ring and the outer ring are lightened simultaneously, and the light source also has the function of circularly lightening according to the reinforced area. Because the annular light source is composed of a plurality of independent lamp beads, the adopted lamp beads can be different spectral wave bands. The lamp beads with different colors (wavelengths) are mutually independent in practical application, and a user can selectively light one or more LEDs to emit light according to practical requirements to achieve the best application effect.
Taking a specific embodiment shown in fig. 6 as an example, two local reinforcing flexible plates are used as a light source plate, and are bent and combined from the middle to form a bead layout with 4 sectors and 2 rings. Each reinforcing area is provided with 5 surface-mounted LED lamp beads; wherein the first ring is in the blue wavelength band (430 nm) and the second ring is in the red wavelength band (630 nm). The L-shaped light source plates of the gauge block are spliced into a square shape, two inclined planes of 15 degrees and 45 degrees are processed on the inner side surface of the light source shell 1, and the light source plates are attached to the inclined planes.
According to the utility model, the bottom surface of the light source shell is provided with the multi-bent inclined plane structure, so that the irradiation angle of the lamp beads on the light source plate can be adjusted, the illuminance of the central area of the annular light source is improved, and the illumination efficiency is improved; and under the limited constraint condition of light source volume, through the mode of arranging of design light source lamp pearl, adopt the form of FPC flexbile plate and local steel sheet reinforcement, make lamp pearl on the board can the surface paste welding, flexible region can be crooked, make and to form certain angle between the LED welding region of steel sheet reinforcement, make the light source lamp pearl optical axis of welding on it can directional illumination central zone, many lamp pearls form even illumination visual field at camera visual field center, the combination of flexible base plate and reinforcement steel sheet, make the light source in the illumination of hi-lite, the degree of consistency also can be guaranteed, the LED surface of steel sheet reinforcement pastes the weld zone and is the plane in addition, be favorable to LED welding and heat dissipation.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A uniform high-brightness annular light source structure is characterized by comprising a light source shell (1), wherein the top surface of the light source shell is provided with a light source upper cover plate (2);
the middle parts of the light source shell (1) and the light source upper cover plate (2) are correspondingly provided with through holes, and the plurality of light source plates (4) are spliced and installed on the bottom surface of the light source shell (1);
the bottom surface of the light source shell (1) is of a multi-bending annular inclined surface structure, and the bending angle of the light source shell needs to meet the condition that the optical axis of a light source arranged on the light source shell points to an illumination central area; light source board (4) are regional (13) including reinforcement area (12) and soft board, and a plurality of light source lamp pearls (5) are evenly arranged on reinforcement area (12), buckle soft board area (13) can make light source board (4) and light source casing (1) inner chamber inclined plane laminating.
2. The structure of a uniform high brightness ring light source according to claim 1, characterized in that the bottom surface of the light source housing (1) is bent sequentially at certain intervals to form a plurality of fan-shaped areas.
3. The structure of the uniform high brightness annular light source according to claim 2, characterized in that the bottom surface of the light source housing (1) is bent in sequence with a certain distance from the center to the outside, so that each sector area forms an annular shape from the inside to the outside, and the bending angle between adjacent rings in the same sector area ranges from 0 to 90 degrees.
4. A uniform high brightness ring light source structure according to any of claims 1-3, characterized in that the middle of the light source plate (4) is a soft plate area, and the reinforcing areas (12) are longitudinally distributed on both sides of the light source plate (4), and between the reinforcing areas (12) on the same side is also a soft plate area.
5. The structure of any one of claims 1 to 3, wherein the number of light source beads in each reinforcement area on the same ring of different sectors is the same.
6. The structure of a uniform high brightness ring light source according to any one of claims 1-3, characterized in that the light source lamp beads (5) use the same or different spectral bands, and the light emitting bands of the light source lamp beads on different rings are the same or different; and the light source lamp beads can be controlled to emit light simultaneously or selectively according to time sequence according to different sectors and different rings.
7. The structure of a uniform high brightness annular light source according to any one of claims 1-3, characterized in that two light source boards (4) are combined and spliced into a bead layout of 4 sectors and 2 rings; the number of light source lamp beads of each reinforcement area on the same ring of different sectors is 5, the first ring from the ring center to the outside is a blue light wave band, and the second ring is a red light wave band; the light source shell (1) is characterized in that the inner side of the light source shell is sequentially processed into two inclined planes of 15 degrees and 45 degrees from inside to outside, and the light source plate (4) is attached to the inclined planes.
8. The structure of a uniform high brightness ring light source according to claim 1, characterized in that the light source housing (1) is milled with several heat dissipation teeth (3) on its side.
9. The structure of the uniform high brightness annular light source according to claim 1, characterized in that the light source housing (1) is provided with a light source interface board (11) at a side, and the signal connector (7) on the light source board (4) is connected with the light source interface board (11) through a wire.
10. The structure of a uniform high brightness ring light source according to claim 1, characterized in that the light source housing (1) is provided with a whole machine fixing hole (8) at the side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220238283.3U CN216521064U (en) | 2022-01-28 | 2022-01-28 | Uniform high-brightness annular light source structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220238283.3U CN216521064U (en) | 2022-01-28 | 2022-01-28 | Uniform high-brightness annular light source structure |
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| CN216521064U true CN216521064U (en) | 2022-05-13 |
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| CN202220238283.3U Active CN216521064U (en) | 2022-01-28 | 2022-01-28 | Uniform high-brightness annular light source structure |
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