CN210982893U - Wide-angle lens externally connected with mobile phone - Google Patents
Wide-angle lens externally connected with mobile phone Download PDFInfo
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- CN210982893U CN210982893U CN201922447034.6U CN201922447034U CN210982893U CN 210982893 U CN210982893 U CN 210982893U CN 201922447034 U CN201922447034 U CN 201922447034U CN 210982893 U CN210982893 U CN 210982893U
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- 210000001747 pupil Anatomy 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 21
- 238000003384 imaging method Methods 0.000 abstract description 6
- 230000004075 alteration Effects 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a wide-angle lens externally connected with a mobile phone, the lens can be directly applied in front of the mobile phone lens, the total length thickness of the lens is 64mm, the diameter of the entrance pupil is 4mm, the focal length is 15, 93mm, and the angle of field is 120 degrees; the lens comprises a first lens, a second lens, a third lens, a fourth lens, a lens group and a fifth lens which are sequentially arranged from the object direction of the mobile phone lens; the lens group comprises a sixth lens and a seventh lens; the wide-angle lens is arranged outside the camera lens of the mobile phone, so that the field angle of the camera lens of the mobile phone is greatly enlarged, and the wide-angle lens can be suitable for application scenes of wide scenes shot in places with relatively short distances; in addition, chromatic aberration, chromatic dispersion and aberration of the whole imaging are optimized by arranging the lens group, the problems of distortion and the like caused by the wide-angle lens can be eliminated as far as possible, and the imaging quality is ensured.
Description
Technical Field
The utility model relates to an optical equipment, especially a wide-angle lens.
Background
At present, all smart phones are provided with mobile phone lenses, the field angle of the lenses is mostly 75 degrees, wide scenes are shot in a relatively close place, and shot pictures have the defects of insufficient foreground, poor depth of field range and the like; the addition of the magnifying lens in front of the mobile phone lens has the defects of low precision, large distortion, fuzzy edge and the like, and cannot meet the current use requirements.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides an external wide-angle lens of a mobile phone.
The utility model provides a technical scheme that its technical problem adopted is:
a wide-angle lens externally connected with a mobile phone can be directly applied to the front of a mobile phone lens, the total length and the thickness of the lens are 64mm, the diameter of an entrance pupil is 4mm, the focal length is 15 mm, 93mm, and the field angle is 120 degrees; the lens comprises a first lens, a second lens, a third lens, a fourth lens, a lens group and a fifth lens which are sequentially arranged from the object direction to the mobile phone lens; the lens group includes a sixth lens and a seventh lens.
Preferably, the object-side surface of the first lens is a convex surface, and the image-side surface of the first lens is a concave surface; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a plane; the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a concave surface; the sixth lens is a positive lens, the seventh lens is a negative lens, and the sixth lens and the seventh lens are cemented to constitute the lens group.
Preferably, an absolute value of a radius of curvature of an object side surface of the first lens is larger than an absolute value of a radius of curvature of an image side surface; the absolute value of the curvature radius of the object side surface of the second lens is larger than the absolute value of the curvature radius of the image side surface; the absolute value of the curvature radius of the object side surface of the third lens is smaller than the absolute value of the curvature radius of the image side surface; an absolute value of a radius of curvature of the object-side surface of the fifth lens is smaller than an absolute value of a radius of curvature of the image-side surface.
Preferably, the glass material of the first lens is L AK9, the refractive index is 1.691002, the Abbe number is 54.708408, the glass material of the second lens is L AFN28, the refractive index is 1.773142, the Abbe number is 49.568242, the glass material of the third lens is F5, the refractive index is 1.603420, and the Abbe number is 38.029919, the glass material of the fourth lens is LL F2, the refractive index is 1.540719, and the Abbe number is 47.171344, the glass material of the fifth lens is PK50, the refractive index is 1.520540, and the Abbe number is 69.712402, the glass material of the sixth lens is N-PK52A, the refractive index is 1.497000, the Abbe number is 81.610312, the glass material of the seventh lens is SF57, the refractive index is 1.846663, and the Abbe number is 23.825580.
The utility model has the advantages that: the wide-angle lens is arranged outside the camera lens of the mobile phone, so that the field angle of the camera lens of the mobile phone is greatly enlarged, and the wide-field application scene can be suitable for shooting in a relatively close place; in addition, chromatic aberration, chromatic dispersion and aberration of the whole imaging are optimized by arranging the lens group, the problems of distortion and the like caused by the wide-angle lens can be eliminated as far as possible, and the imaging quality is ensured.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The directional or positional relationships "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., are those shown in the drawings, are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention.
Referring to fig. 1, a wide-angle lens externally attached to a mobile phone, the lens can be directly applied to the front of a mobile phone lens, the total length of the lens is 64mm, the diameter of an entrance pupil is 4mm, the focal length is 15 mm, 93mm, the Field angle is 120 degrees, the lens comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a lens group 5 and a fifth lens 6 which are arranged in sequence from an object direction to the mobile phone lens, the lens group 5 comprises a sixth lens 7 and a seventh lens 8, the first lens 1 can enable an off-axis light beam to be greatly reduced from a main axis inclination angle to play a role of expanding the Field angle, the second lens 2 and the third lens 3 both play a role of improving an optical path, the fourth lens 4 can shrink light rays to be more concentrated, the lens group 5 is composed of the sixth lens 7 and the seventh lens 8, the structure has the characteristics of short focal length and large magnification ratio compared with a simple lens, the characteristics of a small focal length and a simple lens system MX, the maximum distortion of a Field distortion is calculated as a distortion factor of a small relative distortion, the Field distortion of a Field distortion, the Field distortion of a Field distortion of the mobile phone lens is calculated as a small distortion of a small distortion, the Field distortion of a Field distortion of a.
The object side surface of the first lens 1 is a convex surface, and the image side surface of the first lens is a concave surface; the object side surface of the second lens element 2 is a convex surface, and the image side surface thereof is a concave surface; the object side surface of the third lens element 3 is a convex surface, and the image side surface thereof is a concave surface; the object side surface of the fourth lens 4 is a convex surface, and the image side surface is a plane; the object side surface of the fifth lens 6 is a concave surface, and the image side surface is a concave surface; the sixth lens 7 is a positive lens, the seventh lens 8 is a negative lens, and the sixth lens 7 and the seventh lens 8 are cemented to constitute the lens group 5; the absolute value of the curvature radius of the object side surface of the first lens 1 is larger than the absolute value of the curvature radius of the image side surface; the absolute value of the curvature radius of the object side surface of the second lens 2 is larger than that of the curvature radius of the image side surface; the absolute value of the curvature radius of the object side surface of the third lens 3 is smaller than the absolute value of the curvature radius of the image side surface; the absolute value of the curvature radius of the object-side surface of the fifth lens 6 is smaller than the absolute value of the curvature radius of the image-side surface; in the embodiment, when the viewing angle is 120 degrees, the distortion can be controlled to be below 30, the imaging quality of the central viewing field is about 60, and the distortion is reduced and the imaging quality is improved under the condition of ensuring a larger viewing angle.
The glass material of the first lens 1 is L AK9, the refractive index is 1.691002, the Abbe number is 54.708408, the glass material of the second lens 2 is L AFN28, the refractive index is 1.773142, the Abbe number is 49.568242, the glass material of the third lens 3 is F5, the refractive index is 1.603420, and the Abbe number is 38.029919, the glass material of the fourth lens 4 is LL F2, the refractive index is 1.540719, and the Abbe number is 47.171344, the glass material of the fifth lens 6 is PK50, the refractive index is 1.520540, and the Abbe number is 69.712402, the glass material of the sixth lens 7 is N-PK52A, the refractive index is 1.497000, the Abbe number is 81.610312, the glass material of the seventh lens 8 is SF57, the refractive index is 1.846663, and the Abbe number is 23.825580, and the materials are common in the optical field, have good light transmission effect and refraction effect, are suitable for being applied to wide-angle optical systems, are low in price and high in cost performance.
The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.
Claims (4)
1. A wide-angle lens externally connected with a mobile phone is characterized in that the lens can be directly applied to the front of a mobile phone lens, the total length thickness of the lens is 64mm, the diameter of an entrance pupil is 4mm, the focal length is 15 mm, 93mm, and the field angle is 120 degrees; the lens comprises a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a lens group (5) and a fifth lens (6) which are sequentially arranged from the object direction to the mobile phone lens; the lens group (5) includes a sixth lens (7) and a seventh lens (8).
2. A lens barrel according to claim 1, wherein the object side surface of the first lens element (1) is convex, and the image side surface is concave; the object side surface of the second lens (2) is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens (3) is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens (4) is a convex surface, and the image side surface is a plane; the object side surface of the fifth lens (6) is a concave surface, and the image side surface of the fifth lens is a concave surface; the sixth lens (7) is a positive lens, the seventh lens (8) is a negative lens, and the sixth lens (7) and the seventh lens (8) are cemented to constitute the lens group (5).
3. A lens barrel according to claim 1, characterized in that the absolute value of the radius of curvature of the object side surface of the first lens (1) is larger than the absolute value of the radius of curvature of the image side surface; the absolute value of the curvature radius of the object side surface of the second lens (2) is larger than the absolute value of the curvature radius of the image side surface; the absolute value of the curvature radius of the object side surface of the third lens (3) is smaller than the absolute value of the curvature radius of the image side surface; the absolute value of the curvature radius of the object side surface of the fifth lens (6) is smaller than the absolute value of the curvature radius of the image side surface.
4. The lens barrel according to claim 1, wherein the glass material of the first lens (1) is L AK9, the refractive index is 1.691002, and the abbe number is 54.708408, the glass material of the second lens (2) is L AFN28, the refractive index is 1.773142, and the abbe number is 49.568242, the glass material of the third lens (3) is F5, the refractive index is 1.603420, and the abbe number is 38.029919, the glass material of the fourth lens (4) is LL F2, the refractive index is 1.540719, and the abbe number is 47.171344, the glass material of the fifth lens (6) is PK50, the refractive index is 1.520540, and the abbe number is 69.712402, the glass material of the sixth lens (7) is N-PK52A, the refractive index is 1.497000, and the abbe number is 81.610312, and the glass material of the seventh lens (8) is SF57, the refractive index is 1.846663, and the abbe number is 23.825580.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922447034.6U CN210982893U (en) | 2019-12-30 | 2019-12-30 | Wide-angle lens externally connected with mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922447034.6U CN210982893U (en) | 2019-12-30 | 2019-12-30 | Wide-angle lens externally connected with mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210982893U true CN210982893U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922447034.6U Active CN210982893U (en) | 2019-12-30 | 2019-12-30 | Wide-angle lens externally connected with mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210982893U (en) |
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2019
- 2019-12-30 CN CN201922447034.6U patent/CN210982893U/en active Active
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