CN210427911U - Lens device - Google Patents
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- CN210427911U CN210427911U CN201921069810.7U CN201921069810U CN210427911U CN 210427911 U CN210427911 U CN 210427911U CN 201921069810 U CN201921069810 U CN 201921069810U CN 210427911 U CN210427911 U CN 210427911U
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- lens
- object side
- optical axis
- lens barrel
- effective diameter
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Abstract
The utility model relates to a lens device, include: a lens barrel including a lens chamber; and a plurality of lenses fixed in the lens barrel in order along an optical axis from an object side to an image side, wherein the first lens is a lens closest to the object side, and has a convex cross section along the optical axis, and includes a first portion with a small diameter close to the object side and a second portion with a large diameter close to the image side; the first lens comprises an optical effective diameter part and a peripheral part for bearing and fixing, wherein one part of the optical effective diameter part is positioned at the first part with the small diameter, the other part of the optical effective diameter part is positioned at the second part with the large diameter, and the peripheral part is positioned at the second part with the large diameter; the surface of the first portion includes, from an object side to an image side: a first object side surface, a first peripheral surface, and a first connecting surface that are convex toward the object side; wherein the first object side surface is entirely included within the optically effective diameter portion. The lens device can further reduce the thickness, and simultaneously has wider visual angle and good optical performance.
Description
Technical Field
The utility model relates to an optics field, more specifically say, relate to a lens device.
Background
At present, a plurality of electronic devices such as mobile phones and tablet computers are equipped with front lenses. Fig. 1 is a schematic structural diagram of a lens 100 in the related art, and fig. 2 is a partial sectional view of the lens 100 in the related art. As shown in fig. 1 and 2, the lens barrel 100 includes a lens barrel 101 and a plurality of lenses disposed in the lens barrel 101, and a lens closest to the object side is a first lens 102. The first lens 102 is entirely contained in the lens barrel 101, and the highest point of the optical effective diameter is lower than the end surface of the lens barrel 101 facing the object side. In such a lens, the first lens 102 occupies more space in the lens barrel 101, the viewing angle is limited, and the lens barrel 101 integrally accommodates the first lens 102 therein, resulting in a thicker lens.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the great and visual angle of camera lens thickness receive the defect of restriction among the prior art, provide a camera lens device, can further reduce thickness, have wider visual angle and good optical property simultaneously.
The utility model provides a technical scheme that its technical problem adopted is: a lens device is constructed including:
a lens barrel; and
a plurality of lenses fixed in the lens barrel in order along an optical axis from an object side to an image side, wherein a first lens is a lens closest to the object side, is in a convex shape in cross section along the optical axis, and comprises a first part with a small diameter close to the object side and a second part with a large diameter close to the image side;
the first lens comprises an optical effective diameter part and a peripheral part for bearing and fixing, wherein one part of the optical effective diameter part is positioned at the first part with the small diameter, the other part of the optical effective diameter part is positioned at the second part with the large diameter, and the peripheral part is positioned at the second part with the large diameter;
the surface of the first portion includes, from an object side to an image side: a first object side surface, a first peripheral surface, and a first connecting surface that are convex toward the object side;
wherein the first object side surface is entirely included within the optically effective diameter portion.
According to the lens device, the first peripheral surface of first lens on, be provided with slottedly, the groove with the optical axis is central, is cyclic annular, and its quantity is one or more.
According to the lens apparatus of the present invention, the groove is integrally formed in the range of the optically effective diameter portion of the first lens.
According to the lens apparatus of the present invention, a part of the groove is formed in the range of the optically effective diameter portion of the first lens, and a part of the groove is formed outside the range of the optically effective diameter portion of the first lens.
According to the lens device of the present invention, a cross section of the groove along the optical axis includes a first side near the object side and a second side near the image side, the first side extending toward the object side and forming an acute angle with the optical axis; the second side is perpendicular to the optical axis.
According to the lens device of the present invention, a cross section of the groove along the optical axis includes a first side near the object side and a second side near the image side, the first side extending toward the object side and forming an acute angle with the optical axis; the second side extends towards the image side and forms an acute angle with the optical axis.
According to the lens device of the present invention, the lens barrel includes a large diameter portion near the image side and a small diameter portion near the object side, which are connected to each other and form a step surface therebetween;
the lens barrel further comprises an annular cover connected to the object side end of the lens barrel, an opening is formed in the cover, the diameter of the opening is smaller than or equal to the outer diameter of the first object side surface of the first lens, the second part of the first lens is fixed in the large-diameter part of the lens barrel, the first object side surface protrudes outwards towards the object side along the optical axis, and is flush with the object side surface of the cover or lower than the object side surface of the cover;
the shape of the first object side surface of the first lens corresponds to the shape of the opening.
According to the lens device of the present invention, the lens barrel is cylindrical, a first lens fixing hole is formed in an end portion of the lens barrel facing the object side, the first lens is fixed in the lens barrel and protrudes out of the first lens fixing hole, and the first object side surface protrudes out of an end portion of the lens barrel facing the object side;
the shape of the first object side surface of the first lens is corresponding to the shape of the first lens fixing hole.
The end part of the lens barrel facing to the object side is made of metal, other parts of the lens barrel are made of plastic, and the end part of the lens barrel facing to the object side and the other parts of the lens barrel are connected together through injection molding.
According to the lens device of the present invention, the surface of the second portion includes: the optical axis-perpendicular optical imaging device comprises a second object side surface, a second peripheral surface and a second image side surface, wherein a convex arc-shaped second connecting surface is arranged between the second peripheral surface and the second image side surface, the first connecting surface is connected between the first peripheral surface and the second object side surface, and the first peripheral surface is parallel to the optical axis.
Implement the utility model discloses a lens device has following beneficial effect: the thickness can be further reduced while having a wider viewing angle and good optical performance.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a lens in the prior art;
fig. 2 is a partial sectional view of a lens barrel in the related art;
fig. 3A is a schematic structural diagram of a lens device according to a first embodiment of the present invention;
fig. 3B is a partial cross-sectional view of a lens apparatus according to a first embodiment of the present invention;
fig. 3C is a schematic view of a first lens according to a first embodiment of the present invention;
fig. 4A is a schematic structural diagram of a lens apparatus according to a second embodiment of the present invention;
fig. 4B is a partial sectional view of a lens apparatus according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of another embodiment of a first lens according to the present invention;
fig. 6 is a partial sectional view of a lens apparatus according to a third embodiment of the present invention;
fig. 7 is a partial sectional view of a lens apparatus according to a fourth embodiment of the present invention;
fig. 8 is a schematic view of yet another embodiment of a first lens according to the present invention;
fig. 9 is a partial sectional view of a lens apparatus according to a fifth embodiment of the present invention;
fig. 10 is a partial sectional view of a lens apparatus according to a sixth embodiment of the present invention;
fig. 11 is a schematic view of yet another embodiment of a first lens according to the present invention;
fig. 12 is a partial sectional view of a lens apparatus according to a seventh embodiment of the present invention;
fig. 13 is a partial sectional view of a lens apparatus according to an eighth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in 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 invention and are not intended to limit the invention.
Fig. 3A is a schematic structural diagram of a lens device 20 according to a first embodiment of the present invention; fig. 3B is a partial cross-sectional view of the lens device 20 according to the first embodiment of the present invention; fig. 3C is a schematic diagram of a first lens L1 according to a first embodiment of the present invention. As shown in fig. 3A-3C, in the first embodiment of the present invention, the lens device 20 includes a lens barrel 21 and a plurality of lenses sequentially fixed in the lens barrel 21 along an optical axis OA from an object side to an image side. The first lens L1 is the lens closest to the object side.
The lens barrel 21 includes a lens chamber 211 and an annular cover 212 connected to an object side end of the lens barrel 21, and the cover 212 is provided with an opening 212 a. The lens barrel 21 may be integrally formed with the cover 212. The opening 212a may be, for example, circular, polygonal, or any shape including both straight lines and arcs, and the outer peripheral shape of the first object-side surface L111 of the first lens L1 corresponds to the shape of the opening 212 a.
The lens barrel 21 may have a cylindrical shape, another shape such as a polygonal cylindrical shape, or a shape including both straight lines and arcs, and includes a large diameter portion 211a near the image side and a small diameter portion 211b near the object side, which are connected to each other with a step surface 211c formed therebetween.
The first lens L1 is disposed in the lens chamber 211 near the object-side end of the lens barrel 21, and is fixed in the lens barrel 21 by interference fit or adhesive. In the illustrated embodiment, the first lens L1 is convex in cross section along the optical axis, and includes a small-diameter first portion L11 near the object side and a large-diameter second portion L12 near the image side.
The first lens L1 includes an optically effective diameter portion, and a peripheral portion for bearing against fixation. A part of the optically effective diameter portion is located in the small diameter first portion L11, and the other part is located in the large diameter second portion L12. The peripheral portion is located at the large-diameter second portion and fixed in the large-diameter portion 211a of the lens barrel 21.
The surface of the first portion L11 includes, from the object side to the image side: a first object side surface L111, a first peripheral surface L112, and a first connecting surface L113 that are convex toward the object side, wherein the first object side surface L111 is entirely included in the optically effective diameter portion, that is, the first object side surface L111 is entirely a surface for image formation. This means that the first object side surface L111 does not include any portion that does not participate in image formation, such as a connection chamfer surface with the first peripheral surface L112 or the like. The first object side surface L111 may be, for example, an aspheric surface. The first peripheral surface L112 may be parallel to the optical axis OA, or the first peripheral surface L112 may be non-parallel to the optical axis OA.
The surface of the second portion L12 includes: a second object side surface L121, a second peripheral surface L122, and a second image side surface L123 perpendicular to the optical axis. Wherein a convex arc-shaped second connecting surface L124 may be disposed between the second peripheral surface L122 and the second image-side surface L123. It is easily understood that a part of the second image side surface L123 is used for imaging.
The first connecting surface L113 is connected between the first peripheral surface L112 and the second object side surface L121, and may be a concave arc surface. As can be seen from the above description, the first peripheral surface L112 may be perpendicular to the second object side surface L121.
The second portion L12 of the first lens L1 is fixed inside the large diameter portion 211a of the lens barrel 21, and the first object side surface L111 protrudes outward along the optical axis OA toward the object side, and is flush with or slightly lower than the object side surface of the cover 212. The diameter of the opening 212a in the cover 212 is slightly smaller than or equal to the outer diameter of the first object-side surface L111 of the first lens L1. This structure forms an aperture structure in front of the object side surface of the first lens L1.
Fig. 4A is a schematic structural diagram of a lens device 30 according to a second embodiment of the present invention; fig. 4B is a partial sectional view of a lens device 30 according to a second embodiment of the present invention; in this embodiment, the same portions as those in the first embodiment will not be described again. As shown in fig. 4A and 4B, in the second embodiment of the present invention, the lens device 30 includes a lens barrel 31 and a plurality of lenses sequentially fixed in the lens barrel 31 along an optical axis OA from an object side to an image side. The first lens L1 is the lens closest to the object side. In this embodiment, the structure of the first lens L1 is the same as that of the first embodiment, and the difference therebetween is the structure of the lens barrel 31.
The lens barrel 31 includes a lens chamber 311, the lens barrel 31 is cylindrical, and a first lens fixing hole 311a is formed in an end 311c of the lens barrel 31 facing the object side. The lens barrel 31 may have a cylindrical shape, another shape such as a polygonal cylindrical shape, or a shape including both straight lines and arc lines. The first lens L1 is fixed in the lens chamber 311 and protrudes out of the first lens fixing hole 311a, the first object side surface L111 thereof protrudes out of the object side end 311c of the lens barrel 31, and the second object side surface L121 thereof can be attached to the inner surface of the object side end of the lens barrel 31. The first lens fixing hole 311a may be circular, or may have any other shape, such as a polygon or any shape including both straight lines and arcs, and the outer peripheral shape of the first object side surface L111 of the first lens L1 corresponds to the shape of the first lens fixing hole 311 a.
In this embodiment, lens barrel 31 is integrally molded of, for example, plastic. In an alternative embodiment, the end 311c of the lens barrel 31 toward the object side is made of metal, and the other part of the lens barrel 311 is made of plastic. The end 311c of the lens barrel 31 facing the object side may be connected to the other part of the lens barrel 311 by injection molding or the like. Compared with plastic, metal can achieve higher strength with thinner thickness, so that the thickness of the end part of the lens barrel 31 is effectively reduced, the strength of the end part of the lens barrel is improved, and the forming of the lens barrel with thinner end part is facilitated. The thickness of the end 311c of the lens barrel 31 toward the object side can be as thin as 0.1mm, and plastic is difficult to mold to such a thickness and insufficient in strength.
Fig. 5 is a schematic diagram of another embodiment of the first lens L1 according to the present invention. As shown in fig. 5, the structure of the first lens L1 is changed compared to the first embodiment. On the first peripheral surface L112 of the first lens L11, a groove L112a is provided. The grooves L112a are symmetrically arranged in a ring shape around the optical axis OA of the first lens L1, and the number of the grooves may be one or more, and it is understood that the grooves may be asymmetrical. The groove L112a functions to extinguish light and thereby reduce ghosting that occurs during imaging. In the embodiment shown in fig. 5, the groove L112a is integrally formed within the range of the optically effective diameter portion of the first lens L1. However, the present invention is not limited thereto. The first peripheral surface L112 of the first lens L1 may be non-parallel to the optical axis OA, but rather exhibit a tapered shape that tapers from the image side to the object side. At this time, the groove L112a is formed partially within the range of the optically effective diameter portion of the first lens L1 and partially outside the range of the optically effective diameter portion of the first lens L1.
The cross section of the slot L112a along the optical axis includes two sides: a first side L112a-1 near the object side, and a second side L112a-2 near the image side. In the embodiment of fig. 5, the first edge L112a-1 near the object side extends toward the object side and forms an acute angle with the optical axis OA; the second side L112a-2 near the image side is perpendicular to the optical axis OA.
Fig. 6 is a partial sectional view of a lens apparatus 40 according to a third embodiment of the present invention. The same parts of this embodiment as the first embodiment will not be described again. Unlike the first embodiment described with reference to fig. 3A to 3C, the structure of the first lens L1 is changed, and the structure thereof is the same as that described with reference to fig. 5.
Fig. 7 is a partial sectional view of a lens apparatus 50 according to a fourth embodiment of the present invention. The same parts of this embodiment as the second embodiment will not be described again. Unlike the second embodiment described with reference to fig. 4A to 4B, the structure of the first lens L1 is changed, and the structure thereof is the same as that described with reference to fig. 5.
Fig. 8 is a schematic diagram of still another embodiment of the first lens L1 according to the present invention. This embodiment of the first lens L1 is similar to the structure described with reference to fig. 5, and the same parts are not repeated, and only the differences are described here. Referring to fig. 8, in this embodiment mode, the cross section of the groove L112a along the optical axis includes two sides: a first side L112a-1 near the object side, and a second side L112a-2 near the image side. In the embodiment of fig. 8, the first edge L112a-1 near the object side extends toward the object side and forms an acute angle with the optical axis OA; the second side L112a-2 near the image side extends toward the image side and forms an acute angle with the optical axis OA. Compared with the embodiment of fig. 5, better extinction and ghost reduction effects can be obtained.
Fig. 9 is a partial sectional view of a lens apparatus 60 according to a fifth embodiment of the present invention; the same parts of this embodiment as the first embodiment will not be described again. Unlike the first embodiment described with reference to fig. 3A to 3C, the structure of the first lens L1 is changed, and the structure thereof is the same as that described with reference to fig. 8.
Fig. 10 is a partial sectional view of a lens device 70 according to a sixth embodiment of the present invention. The same parts of this embodiment as the second embodiment will not be described again. Unlike the second embodiment described with reference to fig. 4A to 4B, the structure of the first lens L1 is changed, and the structure thereof is the same as that described with reference to fig. 8.
Fig. 11 is a schematic diagram of still another embodiment of the first lens L1 according to the present invention. This embodiment of the first lens L1 is similar to the structure described with reference to fig. 5, and the same parts are not repeated, and only the differences are described here. Referring to fig. 11, in this embodiment mode, a cross section of the groove L112a along the optical axis includes two sides: a first side L112a-1 near the object side, and a second side L112a-2 near the image side. In the embodiment of fig. 11, the first side L112a-1 near the object side is perpendicular to the optical axis OA; the second side L112a-2 near the image side extends toward the image side and forms an acute angle with the optical axis OA.
Fig. 12 is a partial sectional view of a lens apparatus 80 according to a seventh embodiment of the present invention; the same parts of this embodiment as the first embodiment will not be described again. Unlike the first embodiment described with reference to fig. 3A to 3C, the structure of the first lens L1 is changed, and the structure thereof is the same as that described with reference to fig. 11.
Fig. 13 is a partial sectional view of a lens apparatus 90 according to an eighth embodiment of the present invention. The same parts of this embodiment as the second embodiment will not be described again. Unlike the second embodiment described with reference to fig. 4A to 4B, the structure of the first lens L1 is changed, and the structure thereof is the same as that described with reference to fig. 11.
Compare with the lens device among the prior art, the utility model discloses a lens device can further reduce thickness, has wider visual angle and good optical property simultaneously to and thereby can play the extinction effect and alleviate the ghost that appears among the imaging process.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A lens apparatus, comprising:
a lens barrel; and
a plurality of lenses fixed in the lens barrel in order along an optical axis from an object side to an image side, wherein a first lens is a lens closest to the object side, is in a convex shape in cross section along the optical axis, and comprises a first part with a small diameter close to the object side and a second part with a large diameter close to the image side;
the first lens comprises an optical effective diameter part and a peripheral part for bearing and fixing, wherein one part of the optical effective diameter part is positioned at the first part with the small diameter, the other part of the optical effective diameter part is positioned at the second part with the large diameter, and the peripheral part is positioned at the second part with the large diameter;
the surface of the first portion includes, from an object side to an image side: a first object side surface, a first peripheral surface, and a first connecting surface that are convex toward the object side;
wherein the first object side surface is entirely included within the optically effective diameter portion.
2. The lens device according to claim 1, wherein on the first peripheral surface of the first lens, a groove is provided, the groove being annular with the optical axis as a center, and the number thereof is one or more.
3. The lens device according to claim 2, wherein the groove is integrally formed in a range of an optically effective diameter portion of the first lens.
4. The lens device according to claim 2, wherein a part of the groove is formed within a range of an optically effective diameter portion of the first lens, and a part is formed outside the range of the optically effective diameter portion of the first lens.
5. The lens device according to claim 2, wherein a cross section of the groove along the optical axis includes a first side near the object side and a second side near the image side, the first side extending toward the object side and making an acute angle with the optical axis; the second side is perpendicular to the optical axis.
6. The lens device according to claim 2, wherein a cross section of the groove along the optical axis includes a first side near the object side and a second side near the image side, the first side extending toward the object side and making an acute angle with the optical axis; the second side extends towards the image side and forms an acute angle with the optical axis.
7. The lens device according to any one of claims 1 to 5, wherein the lens barrel includes a large diameter portion near the image side and a small diameter portion near the object side, which are connected to each other with a step surface formed therebetween;
the lens barrel further comprises an annular cover connected to the object side end of the lens barrel, an opening is formed in the cover, the diameter of the opening is smaller than or equal to the outer diameter of the first object side surface of the first lens, the second part of the first lens is fixed in the large-diameter part of the lens barrel, the first object side surface protrudes outwards towards the object side along the optical axis, and is flush with the object side surface of the cover or lower than the object side surface of the cover;
the shape of the first object side surface of the first lens corresponds to the shape of the opening.
8. The lens device according to any one of claims 1 to 5, wherein a first lens fixing hole is provided on an end of the lens barrel facing the object side, the first lens is fixed in the lens barrel and protrudes out of the first lens fixing hole, and the first object side surface protrudes out of an end of the object side of the lens barrel;
the shape of the first object side surface of the first lens is corresponding to the shape of the first lens fixing hole.
9. The lens device according to claim 8, wherein an end portion of the lens barrel facing the object side is made of metal, other portions of the lens barrel are made of plastic, and the end portion of the lens barrel facing the object side and the other portions of the lens barrel are joined together by injection molding.
10. A lens device according to any one of claims 1 to 2, wherein the surface of the second portion includes: the optical axis-perpendicular optical imaging device comprises a second object side surface, a second peripheral surface and a second image side surface, wherein a convex arc-shaped second connecting surface is arranged between the second peripheral surface and the second image side surface, the first connecting surface is connected between the first peripheral surface and the second object side surface, and the first peripheral surface is parallel to the optical axis.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921069810.7U CN210427911U (en) | 2019-07-09 | 2019-07-09 | Lens device |
| TW109108591A TWI791962B (en) | 2019-04-24 | 2020-03-16 | Lens device |
| US16/834,166 US11428893B2 (en) | 2019-04-24 | 2020-03-30 | Lens device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921069810.7U CN210427911U (en) | 2019-07-09 | 2019-07-09 | Lens device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210427911U true CN210427911U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921069810.7U Active CN210427911U (en) | 2019-04-24 | 2019-07-09 | Lens device |
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| CN (1) | CN210427911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022165642A1 (en) * | 2021-02-02 | 2022-08-11 | 欧菲光集团股份有限公司 | Lens and photographing terminal having same |
-
2019
- 2019-07-09 CN CN201921069810.7U patent/CN210427911U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022165642A1 (en) * | 2021-02-02 | 2022-08-11 | 欧菲光集团股份有限公司 | Lens and photographing terminal having same |
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