CN220017113U - Parallel point light source suitable for telecentric lens - Google Patents
Parallel point light source suitable for telecentric lens Download PDFInfo
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- CN220017113U CN220017113U CN202321565550.9U CN202321565550U CN220017113U CN 220017113 U CN220017113 U CN 220017113U CN 202321565550 U CN202321565550 U CN 202321565550U CN 220017113 U CN220017113 U CN 220017113U
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- 230000004308 accommodation Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
The utility model discloses a parallel point light source suitable for a telecentric lens, which relates to the field of parallel point light sources, and comprises a lamp holder, a first accommodating groove is arranged at the top of the lamp holder, an LED circuit board arranged in the first accommodating groove, a Fresnel lens which is arranged at the opening of the first accommodating groove and positioned in the light emitting direction of the LED circuit board, a lens mounting seat which is fixedly connected with the lamp holder and is used for fixing the Fresnel lens at the opening of the first accommodating groove, and a light guide column which is arranged on the lens mounting seat and positioned in the light emitting direction of the Fresnel lens.
Description
Technical Field
The utility model relates to the technical field of parallel point light sources, in particular to a parallel point light source suitable for a telecentric lens.
Background
At present, in the field of machine vision, a point light source belongs to one of common light sources, in the common point light source, a light-emitting light path is usually outwards diffused, a larger included angle is formed between an outermost light path and a vertical direction, and most of light paths reflected by the surface of a sample cannot enter a lens when the telecentric lens is matched for use, so that the visual field can be darkened.
Aiming at the defect that the effect can be achieved only by using the parallel light source, if the field of view is smaller, the field of view is blurred due to the fact that other types of parallel coaxial light sources are used, because the coaxial light sources are generally provided with two lenses (a spectroscope and a lens adding device), when light reflected by a sample passes through the two lenses, the light path can be interfered, and the effect can be affected.
In visual projects for detecting surface defects in the industries of semiconductors, screens and the like, in order to achieve better image effects, parallel light sources are generally used for detection, and only parallel coaxial light sources are used as related applicable light sources. But at present this method has the following problems: 1. the working distance of the telecentric lens is fixed, the parallel coaxial volume is too large, and interference exists when the telecentric lens is installed in space; 2. the glass on the upper surface of the parallel coaxial shaft can accumulate dust and interfere with detection.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a parallel point light source suitable for a telecentric lens, which is characterized in that a Fresnel lens is additionally arranged at the position of a light emitting port of an LED circuit board, so that the imaging effect is improved, and the technical scheme can better mark defects in visual projects for detecting smooth surface defects in the industries of semiconductors, screens and the like, and meets the requirement of high-speed detection.
In order to achieve the above purpose, the utility model provides a parallel point light source suitable for a telecentric lens, which comprises a lamp holder, a first accommodating groove is arranged at the top of the lamp holder, an LED circuit board is arranged in the first accommodating groove, a Fresnel lens which is arranged at the opening of the first accommodating groove and is positioned in the light emitting direction of the LED circuit board is also included, a lens mounting seat which is fixedly connected with the lamp holder and is used for fixing the Fresnel lens at the opening of the first accommodating groove, and a light guide column which is arranged on the lens mounting seat and is positioned in the light emitting direction of the Fresnel lens.
In the above technical scheme, the lamp stand is equipped with annular carrier part in the opening part of first holding tank, fresnel lens bottom all around is supported and is leaned on annular carrier part, the bottom of lens mount pad is equipped with the second holding tank, the second holding tank is equipped with annular fixed part, annular fixed part supports and leans on fresnel lens bottom all around, the inner wall and the lamp stand laminating of second holding tank are fixed.
In the above technical scheme, the top of lens mount pad is equipped with the cylindricality fixed orifices that is linked together and is used for installing the leaded light post with the second holding tank, the intercommunication has the toper inner chamber between cylindricality fixed orifices and the second holding tank.
In the above technical scheme, the lens further comprises a polaroid which is arranged on the lens mounting seat and positioned in the light emitting direction of the light guide column.
In the technical scheme, the outer walls of the lamp holder and the lens mounting seat are provided with a plurality of annular protruding portions, so that the heat dissipation effect is improved.
Among the above-mentioned technical scheme, the outer wall of lens mount pad includes first cylindricality section, second cylindricality section and the third cylindricality section that the diameter grow in proper order, a plurality of annular bellying sets up on the third cylindricality section, is convenient for use this technical scheme and telecentric lens cooperation.
In the above technical scheme, the bottom of lamp stand is equipped with cylindricality fixed part, the outside of cylindricality fixed part is equipped with a plurality of annular installation department.
In the technical scheme, the LED lamp further comprises a connector electrically connected with the LED circuit board.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the technical scheme, the Fresnel lens is additionally arranged at the position of the light emitting port of the LED circuit board, so that diffuse light emitted by the lamp beads in the light source is changed into parallel light which is nearly parallel, the light source is brighter in imaging, defects can be better marked in visual projects of detecting smooth surface defects of industries such as semiconductors and screens, the requirements of high-speed detection are met, the technical scheme is simple in structure, good in sealing effect, free of dust falling, and greatly simplified in mechanism erection.
2. When the lens mounting seat is used, the technical scheme is directly inserted into the coaxial module of the telecentric lens, the outer wall of the lens mounting seat comprises a first cylindrical section, a second cylindrical section and a third cylindrical section, the diameters of the first cylindrical section and the second cylindrical section are sequentially enlarged, namely, the diameter of the first cylindrical section is smaller than that of the second cylindrical section and smaller than that of the third cylindrical section, so that two steps can be formed on the lens mounting seat, and the steps can help the technical scheme to fix the positions.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a parallel point light source suitable for a telecentric lens;
FIG. 2 is a front view of a parallel point source suitable for use in a telecentric lens;
FIG. 3 is a cross-sectional view at A-A in FIG. 2;
FIG. 4 is a first exploded view of a parallel point source suitable for use in a telecentric lens according to the present utility model;
fig. 5 is a second exploded view of a parallel point light source suitable for use in a telecentric lens according to the present utility model.
The reference numerals of the drawings are: 1. a lamp holder; 11. a first accommodation groove; 12. an annular bearing part; 13. a cylindrical fixing portion; 131. a fixing hole; 14. an annular mounting portion; 3. a Fresnel lens; 4. a lens mount; 41. a second accommodation groove; 42. an annular fixing part; 43. a cylindrical fixing hole; 44. a tapered inner cavity; 45. a first cylindrical segment; 46. a second cylindrical section; 47. a third cylindrical segment; 5. a light guide column; 6. a polarizer; 7. an annular protruding portion; 8. and (3) a joint.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
As shown in fig. 1 to 5, the present embodiment provides a parallel point light source suitable for a telecentric lens, which includes a lamp socket 1, an LED circuit board (not shown), a fresnel lens 3, a lens mount 4, a light guide 5, and a connector 8.
The top of lamp stand 1 is equipped with first holding tank 11, and the LED circuit board sets up in first holding tank 11, and fresnel lens 3 is installed in the opening part of first holding tank 11 and is located the light-emitting direction of LED circuit board, and lens mount pad 4 and lamp stand 1 fixed connection are used for fixing fresnel lens 3 in first holding tank 11 opening part, and leaded light post 5 is installed on lens mount pad 4 and is located the light-emitting direction of fresnel lens 3. The connector 8 is electrically connected with the LED circuit board. The lamp socket 1 is provided with an annular bearing 12 at the opening of the first receiving groove 11. The bottom of the lens mounting base 4 is provided with a second accommodating groove 41, and an annular fixing part 42 is arranged in the second accommodating groove 41. During installation, the bottom of the periphery of the Fresnel lens 3 is abutted against the annular bearing part 12, then the lens mounting seat 4 is sleeved on the top of the lamp holder 1, and after the installation is in place, the annular fixing part 42 is abutted against the top of the periphery of the Fresnel lens 3, so that the Fresnel lens 3 is fixed on the annular bearing part 12, and the inner wall of the second accommodating groove 41 is attached and fixed with the lamp holder 1.
The top of lens mount pad 4 is equipped with and is linked together cylindricality fixed orifices 43 with second holding tank 41, and the intercommunication has toper inner chamber 44 between cylindricality fixed orifices 43 and the second holding tank 41, and wherein, light guide column 5 installs in cylindricality fixed orifices 43, and this technical scheme is still preferred including installing in cylindricality fixed orifices 43 and being located light guide column 5 light-emitting direction's polaroid 6. Specifically, the light of this technical scheme sends from the LED circuit board, after fresnel lens 3, the light will become nearly parallel light, then the light guide post 5 is penetrated into through toper inner chamber 44, the external world is wanting to the polaroid 6 and is penetrated, the light that the pointolite of this technical scheme sent can be more parallel more gathering, can be brighter in the aspect of imaging, satisfy the demand of high-speed detection, moreover this technical scheme simple structure, airtight effectual, need not to worry the problem that the dust falls into, greatly simplified the mechanism erects.
The outer walls of the lamp holder 1 and the lens mounting seat 4 of the technical scheme are respectively provided with a plurality of annular protruding portions 7, and the annular protruding portions 7 can improve heat dissipation efficiency and are also convenient to mount and apply the technical scheme when being used with other equipment. The outer wall of the lens mounting base 4 of this technical scheme includes that the diameter becomes first cylindricality section 45, second cylindricality section 46 and third cylindricality section 47 in proper order, the diameter of first cylindricality section 45 < the diameter of second cylindricality section 46 < the diameter of third cylindricality section 47, can form two steps at lens mounting base 4 like this, in inserting telecentric lens's coaxial module completely with this technical scheme's light source light outlet during the use, the step can help this technical scheme to fix a position, be convenient for use this technical scheme and telecentric lens cooperation, in addition, a plurality of annular bellying 7 sets up on third cylindricality section 47, because third cylindricality section 47 is close to the LED circuit board, the heat that produces on the LED circuit board can dispel the heat through annular bellying 7. The bottom of lamp stand 1 of this technical scheme is equipped with cylindricality fixed part 13, and the outside of cylindricality fixed part 13 is equipped with a plurality of annular installation department 14, and the bottom of cylindricality fixed part 13 is equipped with fixed orifices 131. The annular mounting portion 14 is positioned with an external device and then fixed in the fixing hole 131 by a screw or a bolt, so that the point light source according to the present embodiment is assembled and fixed.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (9)
1. The utility model provides a parallel pointolite suitable for telecentric lens, including lamp stand (1), the top is equipped with first holding tank (11), the LED circuit board of setting in first holding tank (11), a serial communication port, still including install fresnel lens (3) in the opening part of first holding tank (11) and lie in LED circuit board light-emitting direction, with lamp stand (1) fixed connection and be used for fixing fresnel lens (3) lens mount pad (4) in first holding tank (11) opening part, install on lens mount pad (4) and lie in fresnel lens (3) light-guiding column (5) of light-emitting direction.
2. The parallel point light source suitable for the telecentric lens according to claim 1, wherein the lamp holder (1) is provided with an annular bearing part (12) at the opening of the first accommodating groove (11), the bottom around the Fresnel lens (3) is propped against the annular bearing part (12), the bottom of the lens mounting seat (4) is provided with a second accommodating groove (41), the second accommodating groove (41) is provided with an annular fixing part (42), the annular fixing part (42) is propped against the bottom around the Fresnel lens (3), and the inner wall of the second accommodating groove (41) is adhered and fixed with the lamp holder (1).
3. A parallel point light source suitable for telecentric lens according to claim 2, characterized in that the top of the lens mount (4) is provided with a cylindrical fixing hole (43) which is connected with the second accommodation groove (41) and is used for mounting the light guide column (5), and a conical inner cavity (44) is communicated between the cylindrical fixing hole (43) and the second accommodation groove (41).
4. A parallel point light source for telecentric lens according to claim 3, further comprising a polarizer (6) mounted on the lens mount (4) and positioned in the light-emitting direction of the light-guiding column (5).
5. A parallel point light source suitable for telecentric lens according to claim 1, characterized in that the outer walls of the lamp holder (1) and the lens mount (4) are provided with a plurality of annular protruding parts (7).
6. A parallel point light source suitable for telecentric lens according to claim 5, characterized in that the outer wall of the lens mount (4) comprises a first cylindrical section (45), a second cylindrical section (46) and a third cylindrical section (47) with successively larger diameters, and a plurality of annular protrusions (7) are arranged on the third cylindrical section (47).
7. A parallel point light source suitable for telecentric lens according to claim 1, characterized in that the bottom of the lamp holder (1) is provided with a cylindrical fixing part (13), and the outer side of the cylindrical fixing part (13) is provided with a plurality of annular mounting parts (14).
8. A parallel point light source suitable for telecentric lens according to claim 7, characterized in that the bottom of the cylindrical fixing part (13) is provided with a fixing hole (131).
9. A parallel point light source suitable for use in a telecentric lens according to claim 1, further comprising a connector (8) electrically connected to the LED circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321565550.9U CN220017113U (en) | 2023-06-19 | 2023-06-19 | Parallel point light source suitable for telecentric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321565550.9U CN220017113U (en) | 2023-06-19 | 2023-06-19 | Parallel point light source suitable for telecentric lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220017113U true CN220017113U (en) | 2023-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321565550.9U Active CN220017113U (en) | 2023-06-19 | 2023-06-19 | Parallel point light source suitable for telecentric lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220017113U (en) |
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2023
- 2023-06-19 CN CN202321565550.9U patent/CN220017113U/en active Active
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