CN113238341B - 3 miniature super wide angle lens of piece formula and electronic equipment - Google Patents
3 miniature super wide angle lens of piece formula and electronic equipment Download PDFInfo
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- CN113238341B CN113238341B CN202110502591.2A CN202110502591A CN113238341B CN 113238341 B CN113238341 B CN 113238341B CN 202110502591 A CN202110502591 A CN 202110502591A CN 113238341 B CN113238341 B CN 113238341B
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- angle lens
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
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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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- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention provides a 3-piece type miniature ultra-wide-angle lens which comprises a first lens, a second lens, a diaphragm, a third lens, an optical filter and chip glass, wherein the first lens, the second lens, the diaphragm, the third lens, the optical filter and the chip glass are sequentially arranged from an object side to an image side along an optical axis; the 3-piece type miniature ultra-wide-angle lens meets the following relational expression: f1'<0, f2' >0, f3'>0, 1.5< TTL/IH <1.8, 0.35< f'/IH <0.40, -0.85< f1'/f3' < -0.77, 2.3< f2'/f3' <2.7, -1.1< f '/f12' < -0.8. According to the 3-piece type miniature ultra-wide-angle lens, the structure and the parameters of the first lens, the second lens and the third lens are set, so that the field angle of a product can reach 140-170, and the field angle of the product is greatly improved.
Description
Technical Field
The invention relates to the technical field of lenses, in particular to a 3-piece type miniature ultra-wide-angle lens and electronic equipment.
Background
The ultra-wide angle lens has a wider field of view, and therefore is widely applied to occasions needing large-range image capture.
However, the conventional super-wide-angle lens has a limited angle of view, which is only about 120 degrees.
Disclosure of Invention
The invention aims to provide a 3-piece type miniature ultra-wide-angle lens and an electronic device, and aims to solve the problem that the existing ultra-wide-angle lens is low in field angle.
The invention provides a 3-piece type miniature ultra-wide-angle lens which comprises a first lens, a second lens, a diaphragm, a third lens, an optical filter and chip glass, wherein the first lens, the second lens, the diaphragm, the third lens, the optical filter and the chip glass are sequentially arranged from an object side to an image side along an optical axis; the 3-piece type miniature ultra-wide-angle lens meets the following relational expression:
f1'<0，f2'>0，f3'>0，1.5<TTL/IH<1.8，0.35<f'/IH<0.40，-0.85<f1'/f3'<-0.77，2.3<f2'/f3'<2.7，-1.1<f'/f12'<-0.8；
wherein, CT is a sum of thicknesses of the first lens element to the sixth lens element on the optical axis, TTL is a distance between an object side surface of the first lens element and an image plane, IH represents a maximum image height of the ultra-wide angle lens, ImaH is the image height of the ultra-wide angle lens, f 'is a focal length of the ultra-wide angle lens, and focal lengths of the first lens element to the third lens element are f1', f2', and f3', respectively.
According to the 3-piece type miniature ultra-wide-angle lens, the structure and the parameters of the first lens, the second lens and the third lens are set, so that the field angle of a product can reach 140-170, and the field angle of the product is greatly improved.
Further, the abbe numbers of the first lens and the third lens are both larger than 48 and smaller than 61.
Further, the refractive index of the first lens and the refractive index of the third lens are both smaller than 1.60.
Further, the refractive index of the second lens is greater than 1.58.
The invention also provides an electronic equipment head which comprises a shell and the 3-piece type miniature ultra-wide-angle lens, wherein the 3-piece type miniature ultra-wide-angle lens is contained in the shell.
Drawings
FIG. 1 is a schematic cross-sectional view of a 3-piece micro ultra-wide-angle lens according to a first embodiment of the present invention;
FIG. 2 is a spatial frequency diagram of the 3-piece micro ultra-wide-angle lens of FIG. 1;
FIG. 3 is a schematic view of curvature of field and distortion of the 3-piece type micro ultra-wide angle lens shown in FIG. 1;
FIG. 4 is a schematic diagram of longitudinal aberration of the 3-piece type micro ultra-wide angle lens shown in FIG. 1;
FIG. 5 is a schematic cross-sectional view of a 3-piece micro ultra-wide-angle lens according to a second embodiment of the present invention;
FIG. 6 is a spatial frequency diagram of the 3-piece micro ultra-wide-angle lens of FIG. 5;
FIG. 7 is a schematic view of curvature of field and distortion of the 3-piece miniature super wide-angle lens of FIG. 5;
FIG. 8 is a schematic diagram showing longitudinal aberrations of the 3-piece type micro ultra-wide angle lens shown in FIG. 5;
FIG. 9 is a schematic cross-sectional view of a 3-piece micro ultra-wide-angle lens according to a third embodiment of the present invention;
FIG. 10 is a spatial frequency diagram of the 3-piece miniature ultra-wide angle lens of FIG. 9;
FIG. 11 is a schematic view of curvature of field and distortion of the 3-piece miniature super wide-angle lens of FIG. 9;
FIG. 12 is a schematic diagram showing longitudinal aberrations of the 3-piece micro ultra-wide angle lens shown in FIG. 9;
FIG. 13 is a schematic cross-sectional view of a 3-piece micro ultra-wide-angle lens according to a fourth embodiment of the present invention;
FIG. 14 is a spatial frequency diagram of the 3-piece miniature ultra-wide angle lens of FIG. 13;
FIG. 15 is a schematic view of curvature of field and distortion of the 3-piece miniature super wide-angle lens of FIG. 13;
fig. 16 is a longitudinal aberration diagram of the 3-piece micro ultra-wide angle lens in fig. 13.
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 4, a 3-piece micro super wide-angle lens according to a first embodiment of the present invention includes a first lens element 11, a second lens element 12, a stop 16, a third lens element 13, a filter 14, and a chip glass 15, which are sequentially arranged along an optical axis direction from an object side to an image side, wherein an object side 111 of an optical axis region of the first lens element 11 is a plane, an image side 112 is a concave surface, an object side 121 of the optical axis region of the second lens element 12 is a convex surface, and an image side 122 is a concave surface; the object-side surface 131 of the third lens element 13 is convex, and the image-side surface 132 is convex.
Specifically, in this embodiment, the system parameters and the structural parameters of the 3-piece type micro ultra-wide angle lens satisfy table one.
Watch 1
Specifically, in this embodiment, the aspheric surface parameters of the 3-piece micro ultra-wide angle lens satisfy table two.
Watch two
According to the 3-piece type micro ultra-wide-angle lens, the structure and the parameters of the first lens 11, the second lens 12 and the third lens 13 are set, so that the field angle of a product can reach 170 degrees, and the field angle of the product is greatly improved.
Referring to fig. 5 to 8, a 3-piece micro super wide-angle lens according to a second embodiment of the present invention includes a first lens 21, a second lens 22, a stop 26, a third lens 23, a filter 24 and a chip glass 25 sequentially arranged along an optical axis direction from an object side to an image side, wherein an object side 211 of an optical axis region of the first lens 21 is a plane, an image side 212 is a concave surface, an object side 221 of the optical axis region of the second lens 22 is a convex surface, and an image side 222 is a concave surface; the object-side surface 231 of the third lens element 23 is convex, and the image-side surface 232 is convex. Specifically, in this embodiment, the system parameters and the structural parameters of the 3-piece type micro ultra-wide angle lens satisfy table three.
Watch III
Specifically, in this embodiment, the aspheric surface parameters of the 3-piece type micro ultra-wide angle lens satisfy table four.
Watch four
According to the 3-piece type micro ultra-wide-angle lens, the structure and the parameters of the first lens 21, the second lens 22 and the third lens 23 are set, so that the field angle of a product can reach 160 degrees, and the field angle of the product is greatly improved.
Referring to fig. 9 to 12, a 3-piece micro super-wide-angle lens according to a third embodiment of the present invention includes a first lens element 31, a second lens element 32, a stop 36, a third lens element 33, a filter 34, and a chip glass 35 sequentially arranged along an optical axis direction from an object side to an image side, wherein an object side 311 of an optical axis region of the first lens element 31 is a plane, an image side 312 is a concave surface, an object side 321 of the optical axis region of the second lens element 32 is a convex surface, and the image side 322 is a concave surface; the object-side surface 331 of the third lens element 33 is convex, and the image-side surface 332 is convex. Specifically, in this embodiment, the system parameters and the structural parameters of the 3-piece type micro ultra-wide angle lens satisfy table five.
Watch five
Specifically, in this embodiment, the aspheric surface parameter of the 3-piece type micro ultra-wide angle lens satisfies table six.
Watch six
According to the 3-piece type micro ultra-wide-angle lens, the structure and the parameters of the first lens 31, the second lens 32 and the third lens 33 are set, so that the field angle of a product can reach 150 degrees, and the field angle of the product is greatly improved.
Referring to fig. 13 to 16, a 3-piece micro super wide-angle lens according to a fourth embodiment of the present invention includes a first lens 41, a second lens 42, a stop 46, a third lens 43, a filter 44 and a chip glass 45 sequentially arranged along an optical axis direction from an object side to an image side, wherein an object side 411 of an optical axis region of the first lens 41 is a plane, an image side 412 is a concave surface, an object side 421 of the optical axis region of the second lens 42 is a convex surface, and an image side 422 is a concave surface; the object-side surface 431 and the image-side surface 432 of the third lens element 43 are convex. Specifically, in this embodiment, the system parameters and the structural parameters of the 3-piece type micro ultra-wide angle lens satisfy table seven.
Watch seven
Specifically, in this embodiment, the aspheric surface parameters of the 3-piece micro ultra-wide angle lens satisfy table eight.
Table eight
According to the 3-piece type micro ultra-wide-angle lens, the structure and the parameters of the first lens 41, the second lens 42 and the third lens 43 are set, so that the field angle of a product can reach 140 degrees, and the field angle of the product is greatly improved.
In some embodiments, the ultra-wide angle lens further satisfies the following relationship:
1、f1'<0，f2'>0，f3'>0；
2、1.5<TTL/IH<1.8；
3、0.35<f'/IH<0.40；
4、-0.85<f1'/f3'<-0.77，
5、2.3<f2'/f3'<2.7，
6、-1.1<f'/f12'<-0.8；
7. the abbe numbers of the first lens and the third lens are both larger than 48 and smaller than 61.
8. The refractive indexes of the first lens and the third lens are both less than 1.60.
9. The refractive index of the second lens is greater than 1.58.
Wherein, CT is a sum of thicknesses of the first lens element to the sixth lens element on the optical axis, TTL is a distance between an object side surface of the first lens element and an image plane, IH represents a maximum image height of the ultra-wide angle lens, ImaH is the image height of the ultra-wide angle lens, f 'is a focal length of the ultra-wide angle lens, and focal lengths of the first lens element to the third lens element are f1', f2', and f3', respectively.
According to the 3-piece type miniature ultra-wide-angle lens, the structure and the parameters of the first lens, the second lens and the third lens are set, so that the field angle of a product can reach 140-170 degrees, and the field angle of the product is greatly improved.
In another embodiment of the present invention, an electronic device (not shown) is further provided, which includes the above 3-piece micro ultra-wide-angle lens, and further includes a housing, where the 3-piece micro ultra-wide-angle lens is accommodated in the housing to provide an electronic device with a large field angle.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (5)
1. A3-piece type miniature ultra-wide-angle lens is characterized by comprising a first lens, a second lens, a diaphragm, a third lens, an optical filter and chip glass which are sequentially arranged from an object side to an image side along an optical axis direction, wherein the object side surface of an optical axis region of the first lens is a plane, the image side surface of the optical axis region of the first lens is a concave surface, the object side surface of the optical axis region of the second lens is a convex surface, and the image side surface of the optical axis region of the second lens is a concave surface; the 3-piece type miniature ultra-wide-angle lens meets the following relational expression:
f1'<0，f2'>0，f3'>0，1.5<TTL/IH<1.8，0.35<f'/IH<0.40，-0.85<f1'/f3'<-0.77，2.3<f2'/f3'<2.7，-1.1<f'/f12'<-0.8；
wherein, CT is a sum of thicknesses of the first lens element to the third lens element on the optical axis, TTL is a distance between an object side surface of the first lens element and an image plane, IH represents an image height of the ultra-wide angle lens, f ' is a focal length of the ultra-wide angle lens, and focal lengths of the first lens element to the third lens element are respectively f1', f2', f3', and f12' is a combined focal length of the first lens element and the second lens element.
2. The 3-piece miniature ultra-wide angle lens according to claim 1, wherein the abbe numbers of the first lens and the third lens are both greater than 48 and less than 61.
3. The 3-piece miniature ultra-wide angle lens of claim 1, wherein the refractive index of each of the first lens and the third lens is less than 1.60.
4. The 3-piece miniature ultra-wide angle lens of claim 1, wherein the refractive index of the second lens is greater than 1.58.
5. An electronic device comprising a housing, further comprising the 3-piece micro ultra-wide-angle lens according to any one of claims 1 to 4, wherein the 3-piece micro ultra-wide-angle lens is accommodated in the housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110502591.2A CN113238341B (en) | 2021-05-09 | 2021-05-09 | 3 miniature super wide angle lens of piece formula and electronic equipment |
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| CN202110502591.2A CN113238341B (en) | 2021-05-09 | 2021-05-09 | 3 miniature super wide angle lens of piece formula and electronic equipment |
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| CN113238341B true CN113238341B (en) | 2022-08-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009139114A1 (en) * | 2008-05-16 | 2009-11-19 | パナソニック株式会社 | Wide angle lens |
| JP5544559B1 (en) * | 2013-12-26 | 2014-07-09 | ナルックス株式会社 | Imaging optical system |
| CN111399195A (en) * | 2019-01-02 | 2020-07-10 | 深圳市资福医疗技术有限公司 | Super wide-angle lens |
| CN111781703A (en) * | 2020-07-20 | 2020-10-16 | 欧菲微电子技术有限公司 | Optical lens, camera module and terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3611552B1 (en) * | 2018-08-16 | 2023-03-08 | Jabil Optics Germany GmbH | Camera lens system for an endoscope, method for producing a camera lens system and an endoscope |
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- 2021-05-09 CN CN202110502591.2A patent/CN113238341B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009139114A1 (en) * | 2008-05-16 | 2009-11-19 | パナソニック株式会社 | Wide angle lens |
| JP5544559B1 (en) * | 2013-12-26 | 2014-07-09 | ナルックス株式会社 | Imaging optical system |
| CN111399195A (en) * | 2019-01-02 | 2020-07-10 | 深圳市资福医疗技术有限公司 | Super wide-angle lens |
| CN111781703A (en) * | 2020-07-20 | 2020-10-16 | 欧菲微电子技术有限公司 | Optical lens, camera module and terminal |
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