CN111948792A - Mounting structure of wide-angle lens - Google Patents
Mounting structure of wide-angle lens Download PDFInfo
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- CN111948792A CN111948792A CN202010503905.6A CN202010503905A CN111948792A CN 111948792 A CN111948792 A CN 111948792A CN 202010503905 A CN202010503905 A CN 202010503905A CN 111948792 A CN111948792 A CN 111948792A
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- lens
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- circular channel
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- image side
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- 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
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- 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
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- 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
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- 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 has a simple and easily realized structure, the arrangement of a sixth meniscus lens ensures that large-angle light rays entering an optical lens can be well refracted, the aperture of the optical lens can be reduced, the wide-angle function can be realized, the arrangement of the fifth meniscus lens is convenient for further refracting the light rays, and the reduction of the outer diameter of a rear lens is facilitated; the fourth biconvex lens, the third biconvex lens, the second biconvex lens and the first meniscus lens are arranged, so that subsequent imaging is facilitated; when the lens is assembled, the first meniscus lens, the second biconvex lens, the first space ring, the third biconvex lens, the second space ring, the fourth biconvex lens, the fifth meniscus lens, the third space ring and the sixth meniscus lens are abutted in the lens cone in sequence so as to keep the distance between the lenses, and the lens is stable and practical.
Description
Technical Field
The invention relates to a mounting structure of a wide-angle lens.
Background
With the common application of lenses in surveillance, industrial detection, intelligent transportation, scanning and copying equipment and photographic cameras, the demand for lenses is higher and higher, the imaging of the lenses is required to be clear, and the high-demand lens quality can realize optical imaging by using more lenses. However, the stability of the lens is difficult to be ensured by using a single compression ring in the excessive lens groups, and therefore, how to overcome the above-mentioned defects becomes 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 purpose, the invention adopts the following technical scheme:
a mounting structure of a wide-angle lens comprises a lens barrel 1, wherein an annular limiting bulge 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 diameter of the first circular channel 11, the inner diameter of the second circular channel 12, the inner diameter of the third circular channel 13 and the inner diameter of 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 which are sequentially abutted from the image side to the object side are arranged in the lens barrel 1, each lens has an object side surface and an image side surface, the image side surface of the first meniscus lens 21 is a convex surface and the object side surface of the second biconvex lens 25 is connected with the image side surface of the second biconvex lens 22 to form a biconvex lens A convex lens, an image side surface of the fifth meniscus lens 25 is a concave surface, an object side surface is a convex surface, an image side surface of the sixth meniscus lens 26 is a concave surface, an object side surface is a convex surface, wherein the first meniscus lens 21, the second biconvex lens 22, the first spacer 3, the third biconvex lens 23, the second spacer 4, the fourth biconvex lens 24 are confined in the first circular channel 11 and the fourth biconvex lens 24 partially protrudes in the second circular channel 12, the fifth meniscus lens 25 is confined in the second circular channel 12 and partially protrudes in the third circular channel 13, the third spacer 5 is confined in the third circular channel 13 and partially protrudes in the fourth circular channel 14, the sixth meniscus lens 26 is confined in the fourth circular channel 14 and partially protrudes outside the fourth circular channel 14, 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 avoiding groove 15 with an inner diameter larger than that of the first circular channel 11 is arranged between the annular limiting bulge 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 disposed on the inner sidewall of the first spacer 3, a first image-side end annular opening 311 for abutting against the object-side surface of the second biconvex lens 22 is disposed near the image-side end of the first annular groove 31, a first object-side end annular opening 312 for abutting against the image-side surface of the third biconvex lens 23 is disposed near the object-side end of the first annular groove 31, and a diameter of the first image-side end annular opening 311 is greater than a diameter of the first object-side end annular opening 312.
Preferably, the first image side annular port 311 and the first object side annular port 312 are chamfered respectively towards the outer side.
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, an annular convex edge 40 that is not in contact with the lenses on both sides is disposed on the inner side wall of the second spacer 4, a distance between the annular convex edge 40 and the object side surface of the third biconvex lens 23 is smaller than a 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 whose inner diameter gradually narrows from the object side to the image side.
Preferably, the inner side wall and the outer side wall of each end of the second space ring 4 are provided with chamfers.
Preferably, the inner side wall of the third space 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, an annular step 261 is provided at an edge of an object side surface of the sixth meniscus lens 26, and the cover ring 6 is provided with an annular convex edge 61 for pressing the annular step 261 when the screw thread is tightened.
Preferably, the annular limiting protrusion 10 is surrounded by a bell mouth 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 structure of the optical lens is simple and easy to realize, the arrangement of the sixth meniscus lens enables large-angle light rays entering the optical lens to be well refracted, the aperture of the optical lens is reduced to be possible, the wide-angle function is facilitated to be realized, the arrangement of the fifth meniscus lens facilitates further refraction of the light rays, and the reduction of the outer diameter of a rear lens is facilitated; the fourth biconvex lens, the third biconvex lens, the second biconvex lens and the first meniscus lens are arranged, so that subsequent imaging is facilitated; when the lens barrel is assembled, the first meniscus lens, the second biconvex lens, the first space ring, the third biconvex lens, the second space ring, the fourth biconvex lens, the fifth meniscus lens, the third space ring and the sixth meniscus lens are abutted in the lens barrel in sequence, so that the assembly is convenient; further, since the fourth double convex lens is confined in the first circular channel and the fourth double convex lens is partially protruded in the second circular channel, so that a fifth meniscus lens confined in the second circular channel can abut against the fourth double convex lens, the fifth meniscus lens is confined in the second circular channel and is partially protruded in the third circular channel, so that a third cage confined in the third circular channel can abut against the fifth meniscus lens, the third cage is confined in the third circular channel and is partially protruded in the fourth circular channel, so that a sixth meniscus lens confined in the fourth circular channel can abut against the third cage, the sixth meniscus lens is partially protruded outside the fourth circular channel, so that the sixth meniscus lens can be conveniently pressed when screwing the cover ring, therefore, the parts from the first meniscus lens to the sixth meniscus lens are ensured to be close to each other in sequence, so that the distance between the lenses is kept, and the lens is stable and practical.
Drawings
Fig. 1 is a structural diagram of the present case.
Fig. 2 is a view of the lens barrel of the present case.
Fig. 3 is a diagram of the first spacer of the present case.
Fig. 4 is a diagram of a second spacer of the present disclosure.
Fig. 5 is a diagram of a third space ring of the present disclosure.
Fig. 6 is a light path diagram of the present disclosure, wherein a filter is further disposed at the rear end of the lens.
Detailed Description
The features of the present invention and other related features are further described in detail below by way of examples to facilitate understanding by those skilled in the art:
as shown in fig. 1 to 6, an installation structure of a wide-angle lens includes a lens barrel 1, the lens barrel 1 is provided with 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 in sequence from an image side to an object side, an inner diameter of the first circular channel 11, an inner diameter of the second circular channel 12, an inner diameter of the third circular channel 13, and an inner diameter of the fourth circular channel 14 are arranged from small to large, the lens barrel 1 is provided with a first meniscus lens 21, a second biconvex lens 22, a first spacer 3, a third biconvex lens 23, a second spacer 4, a fourth biconvex lens 24, a fifth meniscus lens 25, a third spacer 5, and a sixth meniscus lens 26 which are close to each other in sequence from the image side to the object side, each of the first meniscus lens 21 has an object side and an image side, and the image side of the first meniscus lens 21 has a convex surface, a concave surface, a convex surface, a concave, The object side surface is a concave surface, the object side surface of the first meniscus lens 21 is cemented with the image side surface of the second biconvex lens 22 to form a biconvex lens, the image side surface of the fifth meniscus lens 25 is a concave surface, the object side surface is a convex surface, the image side surface of the sixth meniscus lens 26 is a concave surface, the object side surface is a convex surface, wherein the first meniscus lens 21, the second biconvex lens 22, the first cage 3, the third biconvex lens 23, the second cage 4, the fourth biconvex lens 24 are confined 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 confined in the second circular channel 12 and is partially protruded in the third circular channel 13, the third cage 5 is confined 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 a cover ring 6 for pressing the edge of the sixth meniscus lens 26 is screwed on the outer side wall of the object side end of the lens barrel 1.
As described above, the structure of the optical lens is simple and easy to implement, the sixth meniscus lens 26 makes it possible to fold the wide-angle light entering the optical lens, so as to reduce the aperture of the optical lens and facilitate the realization of a wide-angle function, and the fifth meniscus lens 25 facilitates further folding of the light and facilitates 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 that subsequent imaging is facilitated; during assembly, the first meniscus lens 21, the second biconvex lens 22, the first space ring 3, the third biconvex lens 23, the second space ring 4, the fourth biconvex lens 24, the fifth meniscus lens 25, the third space ring 5 and the sixth meniscus lens 26 are sequentially close to the lens barrel 1, so that the assembly is convenient; in addition, since the fourth double convex lens 24 is limited in the first circular channel 11 and the fourth double convex lens 24 is partially protruded in the second circular channel 12, so that the fifth meniscus lens 25 limited in the second circular channel 12 can abut against the fourth double convex lens 24, the fifth meniscus lens 25 is limited in the second circular channel 12 and is partially protruded in the third circular channel 13, so that the third cage 5 limited in the third circular channel 13 can abut against the fifth meniscus lens 25, the third cage 5 is limited in the third circular channel 13 and is partially protruded in the fourth circular channel 14, so that the sixth meniscus lens 26 limited in the fourth circular channel 14 can abut against the third cage 5, and the sixth meniscus lens 26 is partially protruded outside the fourth circular channel 14, therefore, the sixth meniscus lens 26 can be conveniently pressed when the cover ring 6 is screwed, so that the parts from the first meniscus lens 21 to the sixth meniscus lens 26 are ensured to be close to each other in sequence, the distance between the lenses is kept, and the fixing are practical.
As described above, in specific implementation, an annular avoiding groove 15 having an inner diameter larger than that of the first circular passage 11 is provided between the annular limiting protrusion 10 and the first circular passage 11, so as to facilitate the arrangement of a sealing member.
As described above, as shown in fig. 1, 3, and 6, 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 arranged on the inner side wall of the first spacer 3, a first image side end annular opening 311 for abutting against the object side surface of the second biconvex lens 22 is arranged at the position close to the image side end of the first annular groove 31, a first object side end annular opening 312 for abutting against the image side surface of the third biconvex lens 23 is arranged at the position close to the object side end, the aperture of the first image side ring port 311 is larger than the aperture of the first object side ring port 312, in this way, the image-side surface of the third biconvex lens 23 is deeper into the first spacer 3 than the object-side surface of the second biconvex lens 22, the light emitted from the image side surface of the third biconvex lens 23 is not easily blocked by the inner sidewall surface of the first annular groove 31 and cannot reach the object side surface of the second biconvex lens 22.
As described above, in specific implementation, the first image side ring port 311 is chamfered toward the outer side, and the first object side ring port 312 is chamfered toward the outer side.
As described above, as shown in fig. 1, 4, and 6, the image-side surface of the fourth lenticular lens 24 is more convex than the object-side surface of the third lenticular lens 23, the inner sidewall of the second spacer 4 is provided with the annular convex edge 40 that is not in contact with the lenses at both sides, the distance from the annular convex edge 40 to the object-side surface of the third lenticular lens 23 is less than the distance from the annular convex edge 40 to the image-side surface of the fourth lenticular lens 24, and the annular convex edge 41 is surrounded by the gradually narrowing channel 411 whose inner diameter gradually narrows from the object side to the image side.
As described above, in the present invention, the annular flange 41 of the second spacer 4 is disposed to suppress stray light, light can only pass through the gradually narrowing channel 411, and the inner diameter of the gradually narrowing channel 411 is gradually narrowed from the object side to the image side, so that light emitted from the image side of the fourth biconvex lens 24 to the image side of the gradually narrowing channel 411 is not easily blocked by the object side opening wall of the gradually narrowing channel 411.
As mentioned above, in practical application, the inner and outer side walls of the two ends of the second space ring 4 are provided with chamfers.
As described above, as shown in fig. 5, the inner side wall of the third space ring 5 is provided with a third annular groove 51, and the two sides of the third annular groove 51 are isosceles and are respectively provided with a chamfer.
As described above, in an implementation, the edge of the object side surface of the sixth meniscus lens 26 is provided with the annular step 261, and the cover ring 6 is provided with the annular convex edge 61 for pressing the annular step 261 when the screw thread is tightened.
As described above, in practical implementation, the annular limiting protrusion 10 is surrounded by the bell mouth 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 sidewall surface of the annular limiting protrusion 10.
As described above, the present disclosure is directed to a mounting structure of a wide-angle lens, and all technical solutions that are the same as or similar to the present disclosure should be considered to fall within the scope of the present disclosure.
Claims (9)
1. A mounting structure of a wide-angle lens is characterized by comprising a lens barrel (1), wherein an annular limiting bulge (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 diameter of the first circular channel (11), the inner diameter of the second circular channel (12), the inner diameter of the third circular channel (13) and the inner diameter of 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 mounted in the lens barrel (1), each lens having an object side surface and an image side surface, the image side surface of the first meniscus lens (21) being convex, the object side surface being concave, the object side surface of the first meniscus lens (21) being cemented to the image side surface of the second biconvex lens (22) forming a biconvex lens, the image side surface of the fifth meniscus lens (25) being concave, the object side surface being convex, the image side surface of the sixth meniscus lens (26) being concave, the object side surface being 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), the fourth biconvex lens (24) is confined in the first circular channel (11) and the fourth biconvex lens (24) has a portion protruding in the second circular channel (12), the fifth meniscus lens (25) is confined in the second circular channel (12) and has a portion protruding in the third circular channel (13), the third space ring (5) is limited in the third circular channel (13) and partially protrudes in the fourth circular channel (14), the sixth meniscus lens (26) is limited in the fourth circular channel (14) and partially protrudes out of the fourth circular channel (14), and a cover ring (6) for pressing the edge of the sixth meniscus lens (26) is screwed on the outer side wall of the object side end of the lens barrel (1).
2. A mounting structure of a wide-angle lens according to claim 1, wherein an annular avoiding groove (15) having an inner diameter larger than that of the first circular passage (11) is provided between the annular limiting protrusion (10) and the first circular passage (11).
3. A mounting structure of a wide-angle lens according to claim 1, wherein the image side surface of the third biconvex lens (23) is more convex than the object side surface of the second biconvex lens (22), the inner sidewall of the first spacer ring (3) is provided with a first annular groove (31), the first annular groove (31) is provided with a first image side annular opening (311) near the image side end for abutting against the object side surface of the second biconvex lens (22), the first object side annular opening (312) near the object side end for abutting against the image side surface of the third biconvex 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).
4. A mounting structure of a wide-angle lens as claimed in claim 3, wherein the first image side annular aperture (311) is chamfered outward and the first object side annular aperture (312) is chamfered outward.
5. A mounting structure of a wide-angle lens according to claim 1, wherein 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 sidewall of the second spacer (4) is provided with an annular convex edge (40) which is not in contact with the two lens sides, the distance from the annular convex edge (40) to the object side surface of the third biconvex lens (23) is less than the distance from the annular convex edge (40) to the image side surface of the fourth biconvex lens (24), and the annular convex edge (41) is surrounded by a gradually narrowing channel (411) whose inner diameter is gradually narrowed from the object side to the image side.
6. A wide-angle lens mounting structure as claimed in claim 5, wherein the inner and outer side walls of both ends of the second spacer (4) are chamfered.
7. A wide-angle lens mounting structure as claimed in claim 1, wherein the third spacer (5) is provided with a third annular groove (51) on the inner side wall, and the third annular groove (51) is isosceles and chamfered on both sides.
8. A mounting structure of a wide-angle lens according to claim 1, characterized in that an annular step (261) is provided at an object side edge of the sixth meniscus lens (26), and the cover ring (6) is provided with an annular flange (61) for pressing the annular step (261) when the screw thread is tightened.
9. A wide-angle lens mounting structure according to any one of claims 1 to 8, wherein the annular stopper protrusion (10) is surrounded by a flare (101) having an inner diameter gradually increasing from the inside to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503905.6A CN111948792A (en) | 2020-06-05 | 2020-06-05 | Mounting structure of wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010503905.6A CN111948792A (en) | 2020-06-05 | 2020-06-05 | Mounting structure of wide-angle lens |
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| Publication Number | Publication Date |
|---|---|
| CN111948792A true CN111948792A (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010503905.6A Pending CN111948792A (en) | 2020-06-05 | 2020-06-05 | Mounting structure of wide-angle lens |
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| CN (1) | CN111948792A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| EP4134720A1 (en) * | 2021-08-09 | 2023-02-15 | LARGAN Precision Co., Ltd. | Imaging lens system, camera module and electronic device |
-
2020
- 2020-06-05 CN CN202010503905.6A patent/CN111948792A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4134720A1 (en) * | 2021-08-09 | 2023-02-15 | LARGAN Precision Co., Ltd. | 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 |
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