CN113552703A - Two-piece type miniature lens and electronic equipment - Google Patents
Two-piece type miniature lens and electronic equipment Download PDFInfo
- Publication number
- CN113552703A CN113552703A CN202111006504.0A CN202111006504A CN113552703A CN 113552703 A CN113552703 A CN 113552703A CN 202111006504 A CN202111006504 A CN 202111006504A CN 113552703 A CN113552703 A CN 113552703A
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- Prior art keywords
- lens
- piece
- optical axis
- miniature
- image
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- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 239000011521 glass Substances 0.000 claims abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G02B13/003—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 two lenses
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention provides a two-piece type miniature lens, which comprises a first lens, a diaphragm, a second lens, an optical filter and chip glass, wherein the object side surface of the optical axis region of the first lens is a concave surface, the image side surface of the optical axis region of the first lens is a concave surface, and the image side surface of the optical axis region of the second lens is a convex surface; the two-piece miniature lens meets the following relational expression: f1'<0, f2' > 0; FNO is more than or equal to 2.2; 0.45< IH/TTL <0.55, 1.5< IH/f' < 3.5; -2.5< f1'/f2' < -1.0, -0.65< f '/f1' < -0.4, 0.65< f '/f2' < 1.0; the FNO is the relative aperture of the two-piece miniature lens, the TTL is the distance between the object side surface of the first lens and the image surface, the IH is the image height of the two-piece miniature lens, the f ' is the focal length of the two-piece miniature lens, and the focal lengths from the first lens to the second lens are respectively f1' and f2 '. According to the two-piece type micro lens, the structure and the parameters of the first lens and the second lens are set, so that the field angle of a product can reach 80-140, and the field angle of the product is greatly improved.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to a two-piece type miniature lens and electronic equipment.
Background
The lens is an essential component in a machine vision system, directly influences the quality of imaging quality and influences the realization and effect of an algorithm. The lens can be divided into a short-focus lens, a middle-focus lens and a long-focus lens from the focal length; the field of view is divided into wide-angle, standard and telephoto lenses.
The existing lens is often used in small-sized image pickup devices such as mobile phones, so the market demand of the miniature lens is increasing, but the angle of view of the existing miniature lens is generally small, the angle of view of the ordinary two-piece miniature lens is only below 60, if the angle of view needs to be increased, the number of lenses needs to be increased, and the size of the miniature lens is inevitably increased.
Disclosure of Invention
The invention aims to provide a two-piece micro lens to solve the problem that the existing two-piece micro lens is small in field angle.
The invention provides a two-piece miniature lens, which comprises a first lens, a diaphragm, a second lens, an optical filter and chip glass, wherein the first lens, the diaphragm, the second lens, the optical filter and the chip glass are sequentially arranged from an object side to an image side along an optical axis direction; the two-piece miniature lens meets the following relational expression:
f1'<0，f2'>0；
FNO≥2.2；
0.45<IH/TTL<0.55，1.5<IH/f'<3.5；
-2.5<f1'/f2'<-1.0，-0.65<f'/f1'<-0.4，0.65<f'/f2'<1.0；
the FNO is the relative aperture of the two-piece miniature lens, the TTL is the distance between the object side surface of the first lens and the image surface, the IH is the image height of the two-piece miniature lens, the f ' is the focal length of the two-piece miniature lens, and the focal lengths from the first lens to the second lens are respectively f1' and f2 '.
According to the two-piece type micro lens, the structure and the parameters of the first lens and the second lens are set, so that the field angle of a product can reach 80-140, and the field angle of the product is greatly improved.
Further, the abbe number of the first lens is more than 48 and less than 61.
Further, the abbe number of the second lens is more than 48 and less than 6.
Further, the refractive index of the first lens is less than 1.60.
Further, the refractive index of the second lens is less than 1.60.
The embodiment of the invention also provides electronic equipment which comprises an equipment body and the two-piece type micro lens, wherein the two-piece type micro lens is arranged on one side of the equipment body.
Drawings
Fig. 1 is a schematic cross-sectional view illustrating a two-piece microlens according to a first embodiment of the present invention;
FIG. 2 is a spatial frequency diagram of the two-piece microlens of FIG. 1;
FIG. 3 is a schematic diagram of curvature of field and distortion of the two-piece microlens shown in FIG. 1;
FIG. 4 is a schematic cross-sectional view illustrating a two-piece micro lens according to a second embodiment of the present invention;
FIG. 5 is a spatial frequency diagram of the two-piece microlens of FIG. 4;
FIG. 6 is a schematic diagram of curvature of field and distortion of the two-piece microlens shown in FIG. 4;
FIG. 7 is a schematic cross-sectional view illustrating a two-piece microlens in a third embodiment of the present invention;
FIG. 8 is a spatial frequency diagram of the two-piece miniature lens of FIG. 7;
FIG. 9 is a schematic diagram of curvature of field and distortion of the two-piece microlens of FIG. 7;
fig. 10 is a schematic cross-sectional view illustrating a two-piece microlens in a fourth embodiment of the present invention;
FIG. 11 is a spatial frequency diagram of the two-piece microlens of FIG. 10;
FIG. 12 is a schematic diagram of curvature of field and distortion of the two-piece microlens of FIG. 10;
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 3, a two-piece micro lens according to a first embodiment of the present invention includes a first lens element 11, a stop 16, a second lens element 12, a filter 13 and a chip glass 14 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 concave surface, an image side 112 of the optical axis region of the first lens element is a concave surface, an object side 121 of the optical axis region of the second lens element 12 is a concave surface, and an image side 122 of the optical axis region of the second lens element is a convex surface.
Specifically, in this embodiment, the structural parameters of the two-piece micro lens satisfy table 1, and the aspheric parameters satisfy table 2.
TABLE 1
TABLE 2
According to the two-piece type micro lens, the structure and the parameters of the first lens 11 and the second lens 12 are set, so that the field angle of a product can reach 90 degrees, and the field angle of the product is greatly improved.
Referring to fig. 4 to 6, a two-piece micro lens according to a second embodiment of the present invention includes a first lens element 21, a stop 26, a second lens element 22, a filter 23, and a chip glass 24 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 element 21 is a concave surface, an image side 212 is a concave surface, an object side 221 of an optical axis region of the second lens element 22 is a concave surface, and an image side 222 is a convex surface.
Specifically, in this embodiment, the structural parameters of the two-piece micro lens satisfy table 3, and the aspheric parameters satisfy table 4.
TABLE 3
TABLE 4
According to the two-piece type micro lens, the structure and the parameters of the first lens 21 and the second lens 22 are set, so that the field angle of a product can reach 81.6 degrees, and the field angle of the product is greatly improved.
Referring to fig. 7 to 9, a two-piece micro lens according to a third embodiment of the present invention includes a first lens element 31, a stop 36, a second lens element 32, a filter 33 and a chip glass 34 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 concave surface, 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 convex surface.
Specifically, in this embodiment, the structural parameters of the two-piece micro lens satisfy table 5, and the aspheric parameters satisfy table 6.
TABLE 5
TABLE 6
According to the two-piece type micro lens, the field angle of a product can reach 120 through the arrangement of the structures and parameters of the first lens 31 and the second lens 32, so that the field angle of the product is greatly improved.
Referring to fig. 10 to 12, a two-piece micro lens according to a second embodiment of the present invention includes a first lens 41, a stop 46, a second lens 42, a filter 43, and a chip glass 44 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 concave surface, 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 convex surface.
Specifically, in this embodiment, the structural parameters of the two-piece micro lens satisfy table 7, and the aspheric parameters satisfy table 8.
TABLE 7
TABLE 8
According to the two-piece type micro lens, the structure and the parameters of the first lens 41 and the second lens 42 are set, so that the field angle of a product can reach 137.5, and the field angle of the product is greatly improved.
In some embodiments of the present invention, the two-piece miniature lens further satisfies the following relation:
f1'<0，f2'>0；
FNO≥2.2；
0.45<IH/TTL<0.55，1.5<IH/f'<3.5；
-2.5<f1'/f2'<-1.0，-0.65<f'/f1'<-0.4，0.65<f'/f2'<1.0；
the FNO is the relative aperture of the two-piece miniature lens, the TTL is the distance between the object side surface of the first lens and the image surface, the IH is the image height of the two-piece miniature lens, the f ' is the focal length of the two-piece miniature lens, and the focal lengths from the first lens to the second lens are respectively f1' and f2 '.
According to the two-piece type micro lens, the structure and the parameters of the first lens and the second lens are set, so that the field angle of a product can reach 80-140, and the field angle of the product is greatly improved.
Specifically, the abbe number of the first lens is more than 48 and less than 61.
Specifically, the abbe number of the second lens is more than 48 and less than 6.
Specifically, the refractive index of the first lens is less than 1.60.
Specifically, the refractive index of the second lens is less than 1.60.
In an embodiment of the present invention, an electronic device is further provided, which includes a device body, and further includes the two-piece micro lens described in any one of the above, where the two-piece micro lens is disposed on one side of the device body. By arranging the two-piece type miniature lens, the electronic equipment can have a larger field angle while ensuring a smaller size design, and the competitiveness of the product is improved.
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 shall be subject to the appended claims.
Claims (6)
1. A two-piece miniature lens is characterized by comprising a first lens, a diaphragm, a second 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 concave surface, the image side surface of the optical axis region of the first lens is a concave surface, and the image side surface of the optical axis region of the second lens is a convex surface; the two-piece miniature lens meets the following relational expression:
f1'<0，f2'>0；
FNO≥2.2；
0.45<IH/TTL<0.55，1.5<IH/f'<3.5；
-2.5<f1'/f2'<-1.0，-0.65<f'/f1'<-0.4，0.65<f'/f2'<1.0；
the FNO is the relative aperture of the two-piece miniature lens, the TTL is the distance between the object side surface of the first lens and the image surface, the IH is the image height of the two-piece miniature lens, the f ' is the focal length of the two-piece miniature lens, and the focal lengths from the first lens to the second lens are respectively f1' and f2 '.
2. The two-piece microlens of claim 1 wherein the first lens has an abbe number greater than 48 and less than 61.
3. The two-piece microlens of claim 1 wherein the second lens has an abbe number greater than 48 and less than 61.
4. The two-piece microlens of claim 1 wherein the first lens has a refractive index of less than 1.60.
5. The two-piece microlens of claim 1 wherein the second lens has a refractive index of less than 1.60.
6. An electronic device comprising a device body, characterized by further comprising the two-piece micro lens according to any one of claims 1 to 5, the two-piece micro lens being provided on one side of the device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111006504.0A CN113552703B (en) | 2021-08-30 | 2021-08-30 | Two-piece type miniature lens and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111006504.0A CN113552703B (en) | 2021-08-30 | 2021-08-30 | Two-piece type miniature lens and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN113552703A true CN113552703A (en) | 2021-10-26 |
| CN113552703B CN113552703B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111006504.0A Active CN113552703B (en) | 2021-08-30 | 2021-08-30 | Two-piece type miniature lens and electronic equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881876A (en) * | 2010-07-02 | 2010-11-10 | 浙江舜宇光学有限公司 | Micro pick-up lens |
| CN106526803A (en) * | 2016-12-14 | 2017-03-22 | 江西联益光学有限公司 | Micro camera lens |
| CN215340517U (en) * | 2021-08-30 | 2021-12-28 | 深圳市晶钛光学股份有限公司 | Two-piece type miniature lens and electronic equipment |
-
2021
- 2021-08-30 CN CN202111006504.0A patent/CN113552703B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881876A (en) * | 2010-07-02 | 2010-11-10 | 浙江舜宇光学有限公司 | Micro pick-up lens |
| CN106526803A (en) * | 2016-12-14 | 2017-03-22 | 江西联益光学有限公司 | Micro camera lens |
| CN215340517U (en) * | 2021-08-30 | 2021-12-28 | 深圳市晶钛光学股份有限公司 | Two-piece type miniature lens and electronic equipment |
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| Publication number | Publication date |
|---|---|
| CN113552703B (en) | 2024-05-28 |
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