CN110579862B - Eight-million-pixel ultrahigh-resolution wide-angle optical lens - Google Patents
Eight-million-pixel ultrahigh-resolution wide-angle optical lens Download PDFInfo
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- CN110579862B CN110579862B CN201910869266.2A CN201910869266A CN110579862B CN 110579862 B CN110579862 B CN 110579862B CN 201910869266 A CN201910869266 A CN 201910869266A CN 110579862 B CN110579862 B CN 110579862B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
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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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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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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Abstract
The invention relates to an eight million pixel ultrahigh resolution wide-angle optical lens, wherein an optical system of the lens consists of a front group A, a diaphragm C, a rear group B and plate glass L14 which are sequentially arranged along the incident direction of light rays from front to back; the front group A is composed of a positive meniscus lens L1, a negative meniscus lens L2, a negative meniscus lens L3, a double-concave negative lens L4, a first adhesive group formed by closely connecting a double-convex positive lens L5 and a negative meniscus lens L6, and a positive meniscus lens L7 which are sequentially arranged from front to back; the rear group B is composed of a second bonding group, a biconvex positive lens L11, a meniscus positive lens L12 and a meniscus negative lens L13, which are sequentially arranged from front to back and are formed by closely connecting a meniscus negative lens L8, a biconvex positive lens L9 and a meniscus negative lens L10. The optical structure of the lens consists of 13 all-glass spherical lenses, is free of aspheric surface, low in cost and easy to assemble; the ultrahigh-resolution high-light-flux high-field-angle image sensor has ultrahigh resolution, large light flux and large field angle, meets the imaging requirement of 8000 ten thousand pixels, and can be specially used for capturing object details.
Description
Technical Field
The invention relates to an eighty-million-pixel ultrahigh-resolution wide-angle optical lens.
Background
At present, the optical wide-angle ultra-high-definition lens for security and machine vision generally has the following defects: the detail resolution of the object is insufficient, most of the detail resolution is 2000 ten thousand pixels, the system definition is low, and the light transmission quantity is insufficient; the cost is high, for example, in order to realize ultra-high definition, the input cost is increased by using a glass aspheric surface, or the brightness of the object to be measured is insufficient by sacrificing the amount of light passing.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an eight million pixels ultrahigh resolution wide-angle optical lens with ultrahigh resolution, large light flux and large field angle, which meets the imaging requirement of 8000 ten thousand pixels.
The invention is realized by adopting the following scheme: an optical system of the lens consists of a front group A, a diaphragm C, a rear group B and a plate glass L14 which are sequentially arranged along the incident direction of light rays from front to back; the front group A is composed of a positive meniscus lens L1, a negative meniscus lens L2, a negative meniscus lens L3, a double-concave negative lens L4, a first adhesive group formed by closely connecting a double-convex positive lens L5 and a negative meniscus lens L6, and a positive meniscus lens L7 which are sequentially arranged from front to back; the rear group B is composed of a second bonding group, a biconvex positive lens L11, a meniscus positive lens L12 and a meniscus negative lens L13, which are sequentially arranged from front to back and are formed by closely connecting a meniscus negative lens L8, a biconvex positive lens L9 and a meniscus negative lens L10.
Further, an air gap between the positive meniscus lens L1 and the negative meniscus lens L2 is 0.12mm; the air gap between the negative meniscus lens L2 and the negative meniscus lens L3 was 8.49 mm; the air gap between the negative meniscus lens L3 and the negative biconcave lens L4 was 10.34 mm; the air gap between the double-concave negative lens L4 and the first gluing set is 8.91 mm; the air gap between the first glue group and the positive meniscus lens L7 is 30.39 mm; the air gap between the meniscus positive lens L7 and the diaphragm C is 9.61 mm; the air gap between the diaphragm C and the second gluing set is 0.12mm; the air gap between the second glue group and the double convex positive lens L11 is 0.12mm; the air gap between the double convex positive lens L11 and the meniscus positive lens L12 was 0.12mm, the air gap between the meniscus positive lens L12 and the meniscus negative lens L13 was 0.12mm, and the air gap between the meniscus negative lens L13 and the flat glass L14 was 11.07 mm.
Furthermore, the refractive index of the biconvex positive lens L5 is 1.85-1.92, and the Abbe number is 38-45; the refractive index of the meniscus negative lens L6 is 1.95-2.1, and the Abbe number is 17-23; the refractive index of the meniscus negative lens L8 is 1.78-1.95, and the Abbe number is 30-35; the refractive index of the biconvex positive lens L9 is 1.4-1.55, and the Abbe number is 78-85; the refractive index of the meniscus negative lens L10 is 1.95-2.3, and the Abbe number is 22-28.
Further, the focal length f1 of the positive meniscus lens L1, the focal length f2 of the negative meniscus lens L2, the focal length f3 of the negative meniscus lens L3, the focal length f4 of the negative biconcave lens L4, the focal length f5 of the positive biconvex lens L5, the focal length f6 of the negative meniscus lens L6, the focal length f7 of the positive meniscus lens L7, the focal length f8 of the negative meniscus lens L8, the focal length f9 of the positive biconvex lens L9, the focal length f 387f 10 of the negative meniscus lens L10, the focal length f11 of the positive meniscus lens L11, the focal length f12 of the positive meniscus lens L12, and the focal length f13 of the negative meniscus lens L13 satisfy the following relations: -6< f1/f2< -5.3, 0.2< f2/f3<1, 1.2< f3/f4<1.68, -1.9< f4/f5< -0.8, -0.56< f5/f6< -0.2, -2.1< f6/f7< -0.8, -1.9< f7/f8< -0.8, -1.1< f8/f9< -0.5, -1.9< f9/f10< -0.8, -0.9< f10/f11< -0.4, 0.3< f11/f12<0.5, -0.8 f12/f13< -0.5.
Further, the focal length f and the total optical length TTL of the optical system of the lens satisfy the following relation: 0.05< f/TTL < 0.15.
Compared with the prior art, the invention has the following beneficial effects: the optical structure of the lens consists of 13 all-glass spherical lenses, is free of aspheric surface, low in cost and easy to assemble; the ultrahigh-resolution high-light-flux high-field-angle image sensor has ultrahigh resolution, large light flux and large field angle, meets the imaging requirement of 8000 ten thousand pixels, and can be specially used for capturing object details.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Drawings
FIG. 1 is a diagram of an optical system of a lens barrel according to an embodiment of the present invention;
FIG. 2 is a diagram of MTF values of a lens according to an embodiment of the present invention;
fig. 3 is a standard dot-column diagram of a lens according to an embodiment of the invention.
Detailed Description
As shown in fig. 1-2, an optical system of an eight million pixel ultrahigh resolution wide-angle optical lens is composed of a front group a, a diaphragm C, a rear group B and a plate glass L14 in sequence along a forward and backward incident direction of light; the front group A is composed of a positive meniscus lens L1, a negative meniscus lens L2, a negative meniscus lens L3, a double-concave negative lens L4, a first adhesive group formed by closely connecting a double-convex positive lens L5 and a negative meniscus lens L6, and a positive meniscus lens L7 which are sequentially arranged from front to back; the rear group B is composed of a second bonding group, a biconvex positive lens L11, a meniscus positive lens L12 and a meniscus negative lens L13, which are sequentially arranged from front to back and are formed by closely connecting a meniscus negative lens L8, a biconvex positive lens L9 and a meniscus negative lens L10.
The lens adopts a 13-piece structure, the focal power is reasonably distributed, the front group adopts 7 pieces to converge the incident angle of light, and the rear group adopts 6 pieces to carry out aberration balance. The lens still has small distortion at a large field angle by controlling the position of the field diaphragm, and the illumination is controlled within a reasonable range by adjusting the height of the light rays. The lens has ultrahigh resolution, large light flux and large field angle, can be specially used for capturing object details, and can be matched with a CCD or CMOS chip with eighty million pixels for use.
In the present embodiment, the air gap between the positive meniscus lens L1 and the negative meniscus lens L2 is 0.12mm; the air gap between the negative meniscus lens L2 and the negative meniscus lens L3 was 8.49 mm; the air gap between the negative meniscus lens L3 and the negative biconcave lens L4 was 10.34 mm; the air gap between the double-concave negative lens L4 and the first gluing set is 8.91 mm; the air gap between the first glue group and the positive meniscus lens L7 is 30.39 mm; the air gap between the meniscus positive lens L7 and the diaphragm C is 9.61 mm; the air gap between the diaphragm C and the second gluing set is 0.12mm; the air gap between the second glue group and the double convex positive lens L11 is 0.12mm; the air gap between the double convex positive lens L11 and the meniscus positive lens L12 is 0.12mm, the air gap between the meniscus positive lens L12 and the meniscus negative lens L13 is 0.12mm, the air gap between the meniscus negative lens L13 and the plate glass L14 is 11.07mm, and the air gap between the plate glass L14 and the image plane IMA is 12.01 mm.
In the embodiment, the refractive index of the biconvex positive lens L5 is 1.85 to 1.92, preferably 1.88, and the Abbe number is 38 to 45, preferably 40.81; the refractive index of the meniscus negative lens L6 is 1.95-2.1, preferably 2, and the Abbe number is 17-23, preferably 19.32; the refractive index of the meniscus negative lens L8 is 1.78-1.95, preferably 1.81, and the Abbe number is 30-35, preferably 33.29; the refractive index of the biconvex positive lens L9 is 1.4-1.55, preferably 1.5, and the Abbe number is 78-85, preferably 81.61; the refractive index of the meniscus negative lens L10 is 1.95-2.3, preferably 2, and the Abbe number is 22-28, preferably 25.46.
Specific parameters of each lens of the lens in the embodiment of the invention are shown in the following table:
when light rays are incident, the light path sequentially enters the front group A, the diaphragm C and the rear group B for imaging, and when the light rays pass through the front group A, the negative meniscus lens L2 adopts a negative focal power structure to effectively compress the light ray angle of the optical system and is beneficial to correcting the distortion of the system; when the light passes through the diaphragm C, the luminous flux of the light entering the rear group B is limited, and meanwhile, the light cone passing through the rear group B is more symmetrical, so that the coma aberration of the optical system is corrected; when light passes through the rear group B, the lenses of the second cemented group are made of materials with large abbe number difference, the chromatic aberration of the system is effectively corrected, and the formation of the cemented lenses is also beneficial to reducing the volume of the system and reducing tolerance sensitivity.
The optical system of the lens of the invention achieves the following optical indexes:
(1) focal length: EFFL =12.93 mm;
(2) f number = 1.78;
(3) the field angle: 2w =85.9 °;
(4) the diameter of the imaging circle is larger than phi 22 mm;
(5) the relative illumination is more than 55%;
(6) working spectral range: 486nm to 656 nm;
(7) the lens is suitable for 8 million-pixel high-resolution CCD or CMOS cameras.
In this embodiment, the focal length f1 of the positive meniscus lens L1, the focal length f2 of the negative meniscus lens L2, the focal length f3 of the negative meniscus lens L3, the focal length f4 of the negative biconcave lens L4, the focal length f5 of the positive biconvex lens L5, the focal length f6 of the negative meniscus lens L6, the focal length f7 of the positive meniscus lens L7, the focal length f8 of the negative meniscus lens L8, the focal length f9 of the positive biconvex lens L9, the focal length f 387f 10 of the negative meniscus lens L10, the focal length f11 of the positive meniscus lens L11, the focal length f12 of the positive meniscus lens L12, and the focal length f13 of the negative meniscus lens L13 satisfy the following relations: -6< f1/f2< -5.3, 0.2< f2/f3<1, 1.2< f3/f4<1.68, -1.9< f4/f5< -0.8, -0.56< f5/f6< -0.2, -2.1< f6/f7< -0.8, -1.9< f7/f8< -0.8, -1.1< f8/f9< -0.5, -1.9< f9/f10< -0.8, -0.9< f10/f11< -0.4, 0.3< f11/f12<0.5, -0.8 f12/f13< -0.5.
In this embodiment, the focal length f and the total optical length TTL of the optical system of the lens satisfy the following relation: 0.05< f/TTL < 0.15.
The optical structure of the lens consists of 13 all-glass spherical lenses, is free of aspheric surface, low in cost and easy to assemble; the size of the large target surface chip is 4/3 inches, the aperture is large, the incident angle of the chief ray of the image plane is less than 15 degrees, and the large field range of shooting can be 85.9 degrees; as can be seen from fig. 2 and 3, the optical lens has ultrahigh resolution, meets the MTF requirement of 8000 ten thousand pixel high-resolution imaging chips, and is suitable for the imaging fields of super-resolution, capturing object details and the like.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (5)
1. An eight million pixels ultra-high resolution wide-angle optical lens is characterized in that: the optical system of the lens consists of a front group A, a diaphragm C, a rear group B and a plate glass L14 which are arranged in sequence along the incident direction of light rays from front to back; the front group A is composed of a positive meniscus lens L1, a negative meniscus lens L2, a negative meniscus lens L3, a double-concave negative lens L4, a first adhesive group formed by closely connecting a double-convex positive lens L5 and a negative meniscus lens L6, and a positive meniscus lens L7 which are sequentially arranged from front to back; the rear group B is composed of a second bonding group, a biconvex positive lens L11, a meniscus positive lens L12 and a meniscus negative lens L13, which are sequentially arranged from front to back and are formed by closely connecting a meniscus negative lens L8, a biconvex positive lens L9 and a meniscus negative lens L10.
2. The ultra-high resolution wide-angle optical lens of eighty million pixels of claim 1, wherein: the air gap between the positive meniscus lens L1 and the negative meniscus lens L2 was 0.12mm; the air gap between the negative meniscus lens L2 and the negative meniscus lens L3 was 8.49 mm; the air gap between the negative meniscus lens L3 and the negative biconcave lens L4 was 10.34 mm; the air gap between the double-concave negative lens L4 and the first gluing set is 8.91 mm; the air gap between the first glue group and the positive meniscus lens L7 is 30.39 mm; the air gap between the meniscus positive lens L7 and the diaphragm C is 9.61 mm; the air gap between the diaphragm C and the second gluing set is 0.12mm; the air gap between the second glue group and the double convex positive lens L11 is 0.12mm; the air gap between the double convex positive lens L11 and the meniscus positive lens L12 was 0.12mm, the air gap between the meniscus positive lens L12 and the meniscus negative lens L13 was 0.12mm, and the air gap between the meniscus negative lens L13 and the flat glass L14 was 11.07 mm.
3. The ultra-high resolution wide-angle optical lens of eighty million pixels of claim 1, wherein: the refractive index of the biconvex positive lens L5 is 1.85-1.92, and the Abbe number is 38-45; the refractive index of the meniscus negative lens L6 is 1.95-2.1, and the Abbe number is 17-23; the refractive index of the meniscus negative lens L8 is 1.78-1.95, and the Abbe number is 30-35; the refractive index of the biconvex positive lens L9 is 1.4-1.55, and the Abbe number is 78-85; the refractive index of the meniscus negative lens L10 is 1.95-2.3, and the Abbe number is 22-28.
4. The ultra-high resolution wide-angle optical lens of eighty million pixels of claim 1, wherein: the focal length f1 of the meniscus positive lens L1, the focal length f2 of the meniscus negative lens L2, the focal length f3 of the meniscus negative lens L3, the focal length f4 of the biconcave negative lens L4, the focal length f5 of the biconvex positive lens L5, the focal length f6 of the meniscus negative lens L6, the focal length f7 of the meniscus positive lens L7, the focal length f8 of the meniscus negative lens L8, the focal length f9 of the biconvex positive lens L9, the focal length f10 of the meniscus negative lens L10, the focal length f11 of the biconvex positive lens L11, the focal length f12 of the meniscus positive lens L12 and the focal length f13 of the meniscus negative lens L13 satisfy the following relations: -6< f1/f2< -5.3, 0.2< f2/f3<1, 1.2< f3/f4<1.68, -1.9< f4/f5< -0.8, -0.56< f5/f6< -0.2, -2.1< f6/f7< -0.8, -1.9< f7/f8< -0.8, -1.1< f8/f9< -0.5, -1.9< f9/f10< -0.8, -0.9< f10/f11< -0.4, 0.3< f11/f12<0.5, -0.8 f12/f13< -0.5.
5. The ultrahigh-resolution wide-angle optical lens of eighty-million pixels according to claim 1 or 4, wherein: the focal length f and the total optical length TTL of the optical system of the lens meet the following relational expression: 0.05< f/TTL < 0.15.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112394481B (en) * | 2020-11-18 | 2023-10-24 | 西安玄瑞光电科技有限公司 | Ultra-large relative aperture low-light lens |
| CN114047600B (en) * | 2021-11-11 | 2023-03-31 | 福建福光股份有限公司 | High-resolution low-distortion machine vision lens with focal length of 12mm and large target surface |
| CN114063257B (en) * | 2021-11-25 | 2023-05-09 | 福建师范大学 | Wide-angle large-aperture athermal Jiao An anti-lens |
| CN115047590B (en) * | 2022-05-06 | 2023-05-09 | 福建福光股份有限公司 | Large-aperture wide-spectrum lens with compact structure |
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