CN111948792B - A mounting structure for a wide-angle lens - Google Patents
A mounting structure for a wide-angle lens Download PDFInfo
- Publication number
- CN111948792B CN111948792B CN202010503905.6A CN202010503905A CN111948792B CN 111948792 B CN111948792 B CN 111948792B CN 202010503905 A CN202010503905 A CN 202010503905A CN 111948792 B CN111948792 B CN 111948792B
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- lens
- circular channel
- object side
- annular
- biconvex lens
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- 230000005499 meniscus Effects 0.000 claims abstract description 65
- 125000006850 spacer group Chemical group 0.000 claims abstract description 41
- 238000009434 installation Methods 0.000 claims 3
- 238000003384 imaging method Methods 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract description 4
- 230000000717 retained effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Lenses (AREA)
Abstract
The invention discloses a mounting structure of a wide-angle lens, which is simple in structure and easy to realize, and is characterized in that a sixth meniscus lens is arranged, so that large-angle light rays entering an optical lens can be well folded, the aperture of the optical lens is reduced to be possible, the wide-angle function is realized, the arrangement of the fifth meniscus lens is convenient for further folding the light rays, the outer diameter of a rear-end lens is convenient to reduce, the arrangement of a fourth biconvex lens, a third biconvex lens, a second biconvex lens and a first meniscus lens is convenient for subsequent imaging, and the first meniscus lens, the second biconvex lens, a first spacer ring, the third biconvex lens, the second spacer ring, the fourth biconvex lens, the fifth meniscus lens, the third spacer ring and the sixth meniscus lens are sequentially tightly arranged in a lens barrel to keep the interval between the lenses, so that the mounting structure is practical.
Description
Technical Field
The present invention relates to a mounting structure of a wide-angle lens.
Background
With the widespread use of lenses in monitoring, industrial detection, intelligent transportation, scanning and copying devices, and photographic cameras, there is an increasing demand for lenses, which require clear imaging, and the high-demand lens quality must use more lenses to achieve optical imaging. However, it is difficult to ensure the stability of the lens assembly by using a single press ring, so how to overcome the above-mentioned drawbacks is an important issue to be solved by those skilled in the art.
Disclosure of Invention
The invention overcomes the defects of the technology and provides a mounting structure of a wide-angle lens.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The mounting structure of the wide-angle lens comprises a lens barrel 1, wherein an annular limiting protrusion 10, a first circular channel 11, a second circular channel 12, a third circular channel 13 and a fourth circular channel 14 are sequentially arranged in the lens barrel 1 from an image side to an object side, the inner diameters of the first circular channel 11, the second circular channel 12, the third circular channel 13 and the fourth circular channel 14 are arranged from small to large, a first meniscus lens 21, a second biconvex lens 22, a first space ring 3, a third biconvex lens 23, a second space ring 4, a fourth biconvex lens 24, a fifth meniscus lens 25, a third space ring 5 and a sixth meniscus lens 26 which are sequentially abutted from the image side to the object side are arranged in the lens barrel 1, the image side of the first meniscus lens 21 is a convex surface, the object side is a concave surface, the object side surface of the first meniscus lens 21 and the image side surface of the second biconvex lens 22 are connected in a gluing way to form a biconvex lens, the image side surface of the fifth meniscus lens 25 is concave, the object side surface is convex, the image side surface of the sixth meniscus lens 26 is concave, and the object side surface is convex, wherein the first meniscus lens 21, the second biconvex lens 22, the first spacer ring 3, the third biconvex lens 23, the second spacer ring 4 and the fourth biconvex lens 24 are limited in the first circular channel 11 and the fourth biconvex lens 24 is partially protruded in the second circular channel 12, the fifth meniscus lens 25 is limited in the second circular channel 12 and is partially protruded in the third circular channel 13, the third spacer ring 5 is limited in the third circular channel 13 and is partially protruded in the fourth circular channel 14, the sixth meniscus lens 26 is limited in the fourth circular channel 14 and has a part protruding out of the fourth circular channel 14, and the outer side wall of the object side end of the lens barrel 1 is in threaded connection with a cover ring 6 for pressing the edge of the sixth meniscus lens 26.
Preferably, an annular avoidance groove 15 with an inner diameter larger than that of the first circular channel 11 is arranged between the annular limiting protrusion 10 and the first circular channel 11.
Preferably, the image side surface of the third biconvex lens 23 is more convex than the object side surface of the second biconvex lens 22, a first annular groove 31 is provided on the inner side wall of the first spacer ring 3, a first image side annular opening 311 for abutting against the object side surface of the second biconvex lens 22 is provided near the image side end of the first annular groove 31, a first object side annular opening 312 for abutting against the image side surface of the third biconvex lens 23 is provided near the object side end of the first annular groove 31, and the caliber of the first image side annular opening 311 is larger than the caliber of the first object side annular opening 312.
Preferably, the first image side annular opening 311 is further outward and the first object side annular opening 312 is further outward provided with a chamfer.
Preferably, the image side surface of the fourth biconvex lens 24 is more convex than the object side surface of the third biconvex lens 23, the inner side wall of the second spacer ring 4 is provided with an annular convex edge 40 which is not contacted with the lenses at two sides, the distance between the annular convex edge 40 and the object side surface of the third biconvex lens 23 is smaller than the distance between the annular convex edge 40 and the image side surface of the fourth biconvex lens 24, and the annular convex edge 41 is surrounded by a gradually narrowing channel 411 with an inner diameter gradually narrowing from the object side to the image side.
Preferably, the inner and outer side walls of the two ends of the second spacer ring 4 are provided with chamfers.
Preferably, the inner side wall of the third spacer ring 5 is provided with a third annular groove 51, and two sides of the third annular groove 51 are isosceles and are respectively provided with a chamfer.
Preferably, the object side edge of the sixth meniscus lens 26 is provided with an annular step 261, and the cover ring 6 is provided with an annular flange 61 for pressing the annular step 261 when tightening the screw.
Preferably, the annular limiting protrusion 10 is surrounded by a flare 101 with an inner diameter gradually increasing from inside to outside.
Compared with the prior art, the invention has the beneficial effects that:
1. The arrangement of the fourth biconvex lens, the third biconvex lens, the second biconvex lens and the first meniscus lens is convenient for subsequent imaging, and when the lens is assembled, the first meniscus lens, the second biconvex lens, the first spacer ring, the third biconvex lens, the second spacer ring, the fourth biconvex lens, the fifth meniscus lens, the third spacer ring and the sixth meniscus lens are sequentially abutted against the lens barrel, the lens barrel is convenient to assemble, and in addition, the fourth biconvex lens is limited in the first circular channel and the fourth biconvex lens is partially protruded in the second circular channel, the fifth meniscus lens in the second circular channel can be abutted against the fourth biconvex lens, the fifth biconvex lens in the fourth circular channel can be abutted against the fourth biconvex lens, the fourth biconvex lens is protruded in the third circular channel, the fourth biconvex lens is abutted against the third lens in the fourth circular channel, the fourth biconvex lens is abutted against the fourth lens in the fourth circular channel, the fourth meniscus lens is abutted against the third lens in the third circular channel, thereby ensuring that the components between the first meniscus lens and the sixth meniscus lens are in close proximity in order to maintain the spacing between the lenses, which is robust and practical.
Drawings
Fig. 1 is a structural view of the present case.
Fig. 2 is a diagram of a lens barrel of the present case.
Fig. 3 is a first spacer view of the present case.
Fig. 4 is a second spacer view of the present case.
Fig. 5 is a diagram of a third spacer of the present case.
Fig. 6 is a light path diagram of the present case, wherein the rear end of the lens is further provided with a filter.
Detailed Description
The following examples are provided to illustrate the features of the present invention and other related features in further detail to facilitate understanding by those skilled in the art:
As shown in fig. 1 to 6, a mounting structure of a wide-angle lens includes a lens barrel 1, in which an annular limiting protrusion 10, a first circular channel 11, a second circular channel 12, a third circular channel 13, and a fourth circular channel 14 are sequentially disposed in the lens barrel 1 from an image side to an object side, the inner diameters of the first circular channel 11, the second circular channel 12, the third circular channel 13, and the fourth circular channel 14 are arranged from small to large, a first meniscus lens 21, a second biconvex lens 22, a first spacer ring 3, a third biconvex lens 23, a second spacer ring 4, a fourth biconvex lens 24, a fifth meniscus lens 25, a third spacer ring 5, and a sixth meniscus lens 26 are sequentially disposed in the lens barrel 1 from the image side to the object side, the image side of the first meniscus lens 21 is convex, the object side is concave, the object side surface of the first meniscus lens 21 and the image side surface of the second biconvex lens 22 are connected in a gluing way to form a biconvex lens, the image side surface of the fifth meniscus lens 25 is concave, the object side surface is convex, the image side surface of the sixth meniscus lens 26 is concave, and the object side surface is convex, wherein the first meniscus lens 21, the second biconvex lens 22, the first spacer ring 3, the third biconvex lens 23, the second spacer ring 4 and the fourth biconvex lens 24 are limited in the first circular channel 11 and the fourth biconvex lens 24 is partially protruded in the second circular channel 12, the fifth meniscus lens 25 is limited in the second circular channel 12 and is partially protruded in the third circular channel 13, the third spacer ring 5 is limited in the third circular channel 13 and is partially protruded in the fourth circular channel 14, the sixth meniscus lens 26 is limited in the fourth circular channel 14 and has a part protruding out of the fourth circular channel 14, and the outer side wall of the object side end of the lens barrel 1 is in threaded connection with a cover ring 6 for pressing the edge of the sixth meniscus lens 26.
As described above, the structure of the present case is simple and easy to implement, and the arrangement of the sixth meniscus lens 26 enables the light entering the optical lens at a large angle to be well folded, so that the aperture of the optical lens is reduced to be possible and the wide angle function is facilitated, and the arrangement of the fifth meniscus lens 25 facilitates the further folding of the light and the reduction of the outer diameter of the rear lens; the fourth biconvex lens 24, the third biconvex lens 23, the second biconvex lens 22 and the first meniscus lens 21 are arranged so as to facilitate subsequent imaging; the first meniscus lens 21, the second biconvex lens 22, the first spacing ring 3, the third biconvex lens 23, the second spacing ring 4, the fourth biconvex lens 24, the fifth meniscus lens 25, the third spacing ring 5 and the sixth meniscus lens 26 are abutted in the lens barrel 1 in sequence during assembly, so that the assembly is convenient; in addition, since the fourth lenticular lens 24 is retained in the first circular channel 11 and the fourth lenticular lens 24 has a part protruding in the second circular channel 12, it is convenient that a fifth meniscus lens 25 retained in the second circular channel 12 can abut against the fourth lenticular lens 24, the fifth meniscus lens 25 is retained in the second circular channel 12 and has a part protruding in the third circular channel 13, it is convenient that a third spacer ring 5 retained in the third circular channel 13 can abut against the fifth meniscus lens 25, the third spacer ring 5 is retained in the third circular channel 13 and has a part protruding in the fourth circular channel 14, it is convenient that a sixth meniscus lens 26 retained in the fourth circular channel 14 can abut against the third spacer ring 5, the sixth meniscus lens 26 has a part protruding outside the fourth circular channel 14, in this way, the sixth meniscus lens 26 can be conveniently pressed when the cover ring 6 is screwed tightly, so that the parts from the first meniscus lens 21 to the sixth meniscus lens 26 are ensured to be abutted in sequence, the interval between the lenses is kept, and the lens is stable and practical.
As mentioned above, in the implementation, a section of annular avoidance groove 15 with an inner diameter larger than that of the first circular channel 11 is provided between the annular limiting protrusion 10 and the first circular channel 11, so as to facilitate the arrangement of a sealing element.
As described above, as shown in fig. 1,3 and 6, the image side surface of the third lenticular lens 23 is more convex than the object side surface of the second lenticular lens 22, the inner side wall of the first spacer ring 3 is provided with the first annular groove 31, the first annular groove 31 is provided near the image side end with the first image side annular opening 311 for abutting against the object side surface of the second lenticular lens 22, the object side end is provided near the object side end with the first object side annular opening 312 for abutting against the image side surface of the third lenticular lens 23, and the aperture of the first image side annular opening 311 is larger than the aperture of the first object side annular opening 312, so that the image side surface of the third lenticular lens 23 is deeper into the first spacer ring 3 than the object side surface of the second lenticular lens 22, and the light emitted outward from the image side surface of the third lenticular lens 23 is not easily blocked by the inner side wall surface of the first annular groove 31 and cannot reach the object side surface of the second lenticular lens 22.
As described above, in the embodiment, the first image side annular opening 311 is provided with a chamfer on the outer side and the first object side annular opening 312 is provided on the outer side.
As described above, as shown in fig. 1, 4 and 6, the image side surface of the fourth biconvex lens 24 is more convex than the object side surface of the third biconvex lens 23, the inner side wall of the second spacer ring 4 is provided with an annular convex edge 40 which is not contacted with the lenses at two sides, the distance between the annular convex edge 40 and the object side surface of the third biconvex lens 23 is smaller than the distance between the annular convex edge 40 and the image side surface of the fourth biconvex lens 24, and the annular convex edge 41 is surrounded by a gradually narrowing channel 411 with an inner diameter gradually narrowing from the object side to the image side.
As described above, the arrangement of the annular convex edge 41 in the second spacer ring 4 plays a role in suppressing stray light, light can only pass through the gradually narrowing channel 411, and the inner diameter of the gradually narrowing channel 411 gradually narrows from the object side to the image side, so that light from the image side of the fourth lenticular lens 24 to the image side opening direction of the gradually narrowing channel 411 is not easily blocked by the wall of the object side opening of the gradually narrowing channel 411.
As described above, in the specific implementation, the inner and outer sidewalls of the two ends of the second spacer ring 4 are both provided with chamfer angles.
As described above, as shown in fig. 5, the third spacer ring 5 is provided with a third annular groove 51 on the inner side wall, and the third annular groove 51 is provided with chamfers on both sides thereof in an isosceles manner.
As described above, in practice, the object side edge of the sixth meniscus lens 26 is provided with an annular step 261, and the cover ring 6 is provided with an annular flange 61 for pressing the annular step 261 when tightening the screw.
As described above, in the embodiment, the annular limiting protrusion 10 is surrounded by the flare 101 with an inner diameter gradually increasing from inside to outside, so that the light emitted from the image side surface of the first meniscus lens 21 is not easily blocked by the inner side wall surface of the annular limiting protrusion 10.
As described above, the present disclosure protects a mounting structure of a wide-angle lens, and all technical schemes identical or similar to the present disclosure should be shown as falling within the scope of the present disclosure.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503905.6A CN111948792B (en) | 2020-06-05 | 2020-06-05 | A mounting structure for a wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503905.6A CN111948792B (en) | 2020-06-05 | 2020-06-05 | A mounting structure for a wide-angle lens |
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| Publication Number | Publication Date |
|---|---|
| CN111948792A CN111948792A (en) | 2020-11-17 |
| CN111948792B true CN111948792B (en) | 2025-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010503905.6A Active CN111948792B (en) | 2020-06-05 | 2020-06-05 | A mounting structure for a wide-angle lens |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI813011B (en) | 2021-08-09 | 2023-08-21 | 大立光電股份有限公司 | Imaging lens system, camera module and electronic device |
| CN114779424A (en) * | 2022-05-11 | 2022-07-22 | 浙江舜宇光学有限公司 | Spacer ring, imaging lens and electronic device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212433496U (en) * | 2020-06-05 | 2021-01-29 | 中山北方晶华精密光学有限公司 | A wide-angle lens connecting structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005128273A (en) * | 2003-10-24 | 2005-05-19 | Nissin Kohki Co Ltd | Meniscus lens and optical system using the same |
| CN202735579U (en) * | 2011-08-18 | 2013-02-13 | 昆明物理研究所 | Uncooled long-wave infrared ultra-wide-angle fisheye lens |
| CN106371195A (en) * | 2016-11-23 | 2017-02-01 | 福建福光股份有限公司 | Large-wide-angle, high-light-flux and high-definition prime lens |
| CN107656360A (en) * | 2017-11-17 | 2018-02-02 | 福建福光股份有限公司 | The vehicle-mounted tight shot of 2.8mm ultra-wide angle |
| CN109188655A (en) * | 2018-10-31 | 2019-01-11 | 谢卫萍 | A kind of industrial lens convenient for adjusting |
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- 2020-06-05 CN CN202010503905.6A patent/CN111948792B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212433496U (en) * | 2020-06-05 | 2021-01-29 | 中山北方晶华精密光学有限公司 | A wide-angle lens connecting structure |
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| CN111948792A (en) | 2020-11-17 |
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