CN213986973U - Large-aperture panoramic shooting optical system - Google Patents
Large-aperture panoramic shooting optical system Download PDFInfo
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- CN213986973U CN213986973U CN202021939067.9U CN202021939067U CN213986973U CN 213986973 U CN213986973 U CN 213986973U CN 202021939067 U CN202021939067 U CN 202021939067U CN 213986973 U CN213986973 U CN 213986973U
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Abstract
The utility model provides a large aperture panoramic camera optical system, which comprises an object side and an imaging side, wherein the optical system comprises a first negative meniscus lens, a second negative meniscus lens, a third negative meniscus lens, a first positive meniscus lens, a first biconvex lens, a diaphragm, a second biconvex lens, a second positive meniscus lens and a third positive meniscus lens which are coaxially and sequentially arranged; the convex surfaces of the first negative meniscus lens, the second negative meniscus lens, the third negative meniscus lens, the first positive meniscus lens and the first biconvex lens face the object side, and the convex surfaces of the second biconvex lens, the second positive meniscus lens and the third positive meniscus lens face the image side. The utility model provides an optical system has advantages such as big light ring, low chromatic dispersion, compact structure and optics total length.
Description
Technical Field
The utility model belongs to the technical field of optical equipment, a optical system is related to, especially relate to a big light ring panorama optical system that makes a video recording.
Background
The panoramic optical system has an oversized imaging field of view which exceeds 360 degrees multiplied by 180 degrees, so that a scene image without dead angles can be obtained, which cannot be realized by a common optical system or a lens. Therefore, the panoramic optical system is widely applied to the fields of security, monitoring, AR/VR and the like. The panoramic camera is generally composed of an even number of wide-angle or fisheye lenses, and a certain field angle is formed between every two adjacent lenses so as to facilitate the subsequent fusion splicing processing of images shot by the lenses. The imaging quality of the lens is related to the quality of splicing panoramic shooting images, the aperture of the lens for panoramic shooting is small at present, and the quality of a shot picture is poor for shooting in a dark light environment and is not suitable for all-weather use.
CN105866932B discloses a high-pixel day and night confocal panoramic imaging optical system, which at least comprises, from the object plane to the image plane along the optical axis: the zoom lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The object surface side of the first lens is a convex surface, the image surface side of the first lens is a concave surface, and the focal power of the first lens is negative; the object plane side of the second lens is a plane, the image plane side of the second lens is a concave surface, and the focal power of the second lens is negative; the object plane side of the third lens is a concave surface, the image plane side of the third lens is a concave surface, and the focal power of the third lens is negative; the object surface side of the fourth lens is a convex surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive; the object surface side of the fifth lens is a convex surface, the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive; the object plane side of the sixth lens is a concave surface, the image plane side of the sixth lens is a concave surface, and the focal power of the sixth lens is negative; the seventh lens element has a convex object surface side and a convex image surface side, and has positive refractive power.
CN111308647A A super large aperture starlight level small-sized full glass optical system, the optical system comprises a front group A and a rear group B which are arranged along an incident light path from front to back in sequence; the front group A comprises a first cemented lens group formed by tightly connecting a meniscus negative lens A1 and a meniscus positive lens A2, a second cemented lens group formed by tightly connecting a biconcave negative lens A3 and a meniscus positive lens A4, a meniscus positive lens A5 and a biconvex positive lens A6, which are arranged in sequence from front to back, and the front group B comprises a third cemented lens group formed by tightly connecting a meniscus negative lens B1, a biconvex positive lens B2 and a biconcave negative lens B3, a plano-convex positive lens B4 and a meniscus negative lens B5, which are arranged in sequence from front to back. The object surface side of the eighth lens is a convex surface, the image surface side of the eighth lens is a convex surface, and the focal power of the eighth lens is positive; the ninth lens element has a convex object surface side and a concave image surface side, and has positive focal power.
CN107422462A discloses a large-aperture ultra-high definition day and night confocal optical system, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a photosensitive chip sequentially arranged along an optical axis from an object plane to an image plane, wherein a diaphragm is arranged between the third lens and the fourth lens, the first lens, the third lens and the sixth lens are glass spherical lenses, the second lens, the fourth lens and the fifth lens are plastic aspheric lenses, and focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially negative, positive, negative and positive.
Most of the existing optical systems for panoramic photography have the defects of complex structure, large size, large chromatic dispersion and the like.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a big light ring panorama optical system that makes a video recording, there is the structure complicacy mostly to the optical system who is applicable to the panorama and makes a video recording usefulness, and the size is great, and dispersion defects such as great have big light ring, low dispersion, compact structure, optical system length are short, the high panorama optical system that makes a video recording of imaging resolution.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a large-aperture panoramic camera optical system, which comprises a first negative meniscus lens, a second negative meniscus lens, a third negative meniscus lens, a first positive meniscus lens, a first biconvex lens, a diaphragm, a second biconvex lens, a second positive meniscus lens and a third positive meniscus lens which are coaxially and sequentially arranged; the convex surfaces of the first negative meniscus lens, the second negative meniscus lens, the third negative meniscus lens, the first positive meniscus lens and the first biconvex lens face the object side, and the convex surfaces of the second biconvex lens, the second positive meniscus lens and the third positive meniscus lens face the image side.
The utility model provides an optical system has advantages such as big light ring, low chromatic dispersion, compact structure and optics total length, through calculating, the utility model provides an optical system's formation of image visual field is 150 degrees, and the F # is 2.08, and optics total length is less than or equal to 22mm, and the biggest bore of optical lens is not more than 25 mm. The large aperture can increase the light flux, so that the picture is brighter, and the night shooting is facilitated. In a specific implementation, an iris diaphragm can be set, when the ambient light is strong, the iris diaphragm is reduced to reduce the light transmission amount, and overexposure of the image sensor is avoided, and when the ambient light is weak, the iris diaphragm is increased.
It should be noted that the utility model discloses can also carry out the anti-reflection coating to each optical lens and handle the stray light that causes in order to reduce inside light reflection, effectively avoid the production of ghost, improve the picture quality that optical system shot under the highlight.
As an optimized technical scheme of the utility model, the concave surface outer fringe of the negative meniscus lens of second and the convex surface outer fringe of the negative meniscus lens of third veneer form first veneer group.
The concave surface of the first positive meniscus lens and the convex surface of the first biconvex lens are tightly adhered and glued to form a second gluing group.
And the convex surface of the second biconvex lens is tightly adhered to and glued with the concave surface of the second positive meniscus lens to form a third gluing group.
The first negative meniscus lens and the first gluing group are distributed at intervals, the first gluing group and the second gluing group are distributed at intervals, the second gluing group and the third gluing group are distributed at intervals, and the third gluing group and the third positive meniscus lens are distributed at intervals.
And the air gap between the first negative meniscus lens and the first gluing group is 2 mm.
The air gap between the first gluing set and the second gluing set is 4.5 mm.
And the air gap between the second gluing set and the third gluing set is 1.1 mm.
And the air gap between the third bonding group and the third positive meniscus lens is 0.2 mm.
As an optimized technical scheme of the utility model, the material of first negative meniscus lens be lanthanum flint glass.
The second negative meniscus lens is made of dense crown glass.
The third negative meniscus lens is made of lanthanum crown glass.
The first positive meniscus lens, the first biconvex lens and the third positive meniscus lens are all made of heavy flint glass.
The second biconvex lens is made of fluorine crown glass.
The second positive meniscus lens is made of flint glass.
As a preferred technical proposal of the utility model, the first negative meniscus lens is made of N-LAF 33.
The material of the second negative meniscus lens is ZKN 7.
The third negative meniscus lens is made of N-LAK 34.
The first positive meniscus lens is made of SF 56A.
The first biconvex lens is made of N-KZFS 8.
The second biconvex lens is made of N-FK 56.
The second positive meniscus lens is made of F2.
The third positive meniscus lens is made of N-SF 57.
As an optimized technical proposal of the utility model, the convex vertex curvature radius of the first negative meniscus lens is recorded as R1The refractive index of the convex surface of the first negative meniscus lens is recorded as n1，18mm＜R1＜21mm，n11.8, e.g. R1May be 18mm, 18.5mm, 19mm, 19.5mm, 20mm, 20.5mm or 21mm, but is not limited to the recited values, and other values not recited within the range of values are equally applicable.
The radius of curvature of the vertex of the concave surface of the first negative meniscus lens is recorded as R2The refractive index of the concave surface of the first negative meniscus lens is recorded as n2，13mm＜R2＜16mm，n 21, exampleFor example, R2 may be 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm or 16mm, but is not limited to the values recited, and other values not recited within the range are equally applicable.
As an optimized technical proposal of the utility model, the convex vertex curvature radius of the second negative meniscus lens is recorded as R3The refractive index of the convex surface of the second negative meniscus lens is recorded as n3，20mm＜R3＜25mm，n3For example, R3 may be 20mm, 20.5mm, 21mm, 21.5mm, 22mm, 22.5mm, 23mm, 23.5mm, 24mm, 24.5mm or 25mm, although not limited to the values listed, and other values not listed within this range are equally applicable.
The radius of curvature of the vertex of the concave surface of the second negative meniscus lens is recorded as R4The radius of curvature of the vertex of the concave surface of the second negative meniscus lens is recorded as n4，3mm＜R4＜5mm，n4For example, R4 may be 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm or 5mm, but is not limited to the values listed and other values not listed within the range are equally applicable.
The convex vertex curvature radius of the third negative meniscus lens is recorded as R5The refractive index of the convex surface of the third negative meniscus lens is recorded as n5，25mm＜R5＜30mm，n51.7, e.g. R5May be 25mm, 25.5mm, 26mm, 26.5mm, 27mm, 27.5mm, 28mm, 28.5mm, 29mm, 29.5mm or 30mm, but is not limited to the recited values, and other values not recited within the range of values are equally applicable.
The radius of curvature of the vertex of the concave surface of the third negative meniscus lens is recorded as R6The radius of curvature of the vertex of the concave surface of the third negative meniscus lens is recorded as n6，3mm＜R6＜5mm，n6For example, R6 may be 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm or 5mm, but is not limited to the values listed and other values not listed within the range are equally applicable.
As an optimized technique of the utility modelThe convex vertex curvature radius of the first positive meniscus lens is recorded as R7The refractive index of the convex surface of the first positive meniscus lens is recorded as n7，3mm＜R7＜5mm，n7For example, R7 may be 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm or 5mm, although not limited to the values recited, and other values not recited within the range are equally applicable.
The vertex curvature radius of the bonding surface of the first positive meniscus lens and the first biconvex lens is recorded as R8The refractive index of the bonding surface of the first positive meniscus lens and the first biconvex lens is recorded as n8，1mm＜R8＜3mm，n8For example, R8 may be 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm or 3.0mm, although not limited to the values listed, and other values not listed in this range are equally applicable.
The curvature radius of the surface vertex at the near imaging side of the first biconvex lens is recorded as R9The surface refractive index of the first biconvex lens at the near imaging side is recorded as n9，-80mm＜R9＜-70mm，n9For example, R9 may be-80 mm, -79mm, -78mm, -77mm, -76mm, -75mm, -74mm, -73mm, -72mm, -71mm or-70 mm, but is not limited to the values listed, and other values not listed within the range of values are equally applicable.
In a preferred embodiment of the present invention, the curvature radius of the vertex of the second biconvex lens near the object is denoted as R10The refractive index of the near-object side surface of the second biconvex lens is n10，1mm＜R10＜3mm，n10For example, R10 may be 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm or 3.0mm, although not limited to the values listed, and other values not listed in this range are equally applicable.
The vertex curvature radius of the bonding surface of the second biconvex lens and the second positive meniscus lens is recorded as R11Said second lenticular surface is transparentThe refractive index of the bonding surface of the mirror and the second positive meniscus lens is recorded as n11，-3mm＜R11＜-1mm，n111.6, e.g. R11May be-3 mm, -2.8mm, -2.6mm, -2.4mm, -2.2mm, -2mm, -1.8mm, -1.6mm, -1.4mm, -1.2mm or-1 mm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
The convex vertex curvature radius of the second positive meniscus lens is recorded as R12The refractive index of the convex surface of the second positive meniscus lens is recorded as n12，-3mm＜R12＜-1mm，n 121, e.g. R12May be-3 mm, -2.8mm, -2.6mm, -2.4mm, -2.2mm, -2mm, -1.8mm, -1.6mm, -1.4mm, -1.2mm or-1 mm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
As an optimized technical scheme of the utility model, the concave surface summit curvature radius of the third positive meniscus lens record as R13The refractive index of the concave surface of the third positive meniscus lens is recorded as n13，-3mm＜R13＜-1mm，n131.8, -3mm, -2.8mm, -2.6mm, -2.4mm, -2.2mm, -2mm, -1.8mm, -1.6mm, -1.4mm, -1.2mm or-1 mm, for example R13May be-3 mm, -2.8mm, -2.6mm, -2.4mm, -2.2mm, -2mm, -1.8mm, -1.6mm, -1.4mm, -1.2mm or-1 mm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
The convex vertex curvature radius of the third positive meniscus lens is recorded as R14The refractive index of the convex surface of the third positive meniscus lens is recorded as n14，-3mm＜R14＜-2mm，n 141, e.g. R14May be-3 mm, -2.9mm, -2.8mm, -2.7mm, -2.6mm, -2.5mm, -2.4mm, -2.3mm, -2.2mm, -2.1mm or-2.0 mm, but is not limited to the values listed, and other values not listed in the range of values are equally applicable.
As a preferred technical solution of the present invention, the imaging field of view of the optical system is 150 °.
The F # of the optical system is 2.08.
The total optical length of the optical system is 22mm or less, and may be, for example, 21mm, 21.1mm, 21.2mm, 21.3mm, 21.4mm, 21.5mm, 21.6mm, 21.7mm, 21.8mm, 21.9mm or 22mm, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
Preferably, the maximum aperture of the optical system is less than or equal to 25mm, and may be, for example, 15mm, 16mm, 17mm, 18mm, 20mm, 21mm, 22mm, 23mm, 24mm or 25mm, but is not limited to the values listed, and other values not listed in the range of values are also applicable.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an optical system has advantages such as big light ring, low chromatic dispersion, compact structure and optics total length, through calculating, the utility model provides an optical system's formation of image visual field is 150 degrees, and the F # is 2.08, and optics total length is less than or equal to 22mm, and the biggest bore of optical lens is not more than 25 mm. The large aperture can increase the light flux, so that the picture is brighter, and the night shooting is facilitated. In a specific implementation, an iris diaphragm can be set, when the ambient light is strong, the iris diaphragm is reduced to reduce the light transmission amount, and overexposure of the image sensor is avoided, and when the ambient light is weak, the iris diaphragm is increased.
Drawings
Fig. 1 is a schematic structural diagram of an optical system according to an embodiment of the present invention.
1-a first negative meniscus lens; 2-a second negative meniscus lens; 3-a third negative meniscus lens; 4-a first positive meniscus lens; 5-a first biconvex lens; 6-diaphragm; 7-a second biconvex lens; 8-a second positive meniscus lens; 9-third positive meniscus lens.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In one embodiment, the present invention provides a large aperture panoramic imaging optical system as shown in fig. 1, from the object side to the imaging side, said optical system comprising a first negative meniscus lens 1, a second negative meniscus lens 2, a third negative meniscus lens 3, a first positive meniscus lens 4, a first biconvex lens 5, a diaphragm 6, a second biconvex lens 7, a second positive meniscus lens 8 and a third positive meniscus lens 9, which are coaxially and sequentially disposed; along the optical path direction, the convex surfaces of the first negative meniscus lens 1, the second negative meniscus lens 2, the third negative meniscus lens 3, the first positive meniscus lens 4 and the first biconvex lens 5 face the object side, and the convex surfaces of the second biconvex lens 7, the second positive meniscus lens 8 and the third positive meniscus lens 9 face the image side.
The outer edge of the concave surface of the second negative meniscus lens 2 is glued with the outer edge of the convex surface of the third negative meniscus lens 3 to form a first gluing group; the concave surface of the first positive meniscus lens 4 and the convex surface of the first biconvex lens 5 are tightly adhered and glued to form a second gluing group; the convex surface of the second biconvex lens 7 and the concave surface of the second positive meniscus lens 8 are tightly adhered and glued to form a third gluing group. The air gap between the first negative meniscus lens 1 and the first glue set is 2 mm; the air gap between the first gluing set and the second gluing set is 4.5 mm; the air gap between the second gluing set and the third gluing set is 1.1 mm; the air gap between the third glue set and the third positive meniscus lens 9 is 0.2 mm.
Alternatively, the material of each lens is as follows:
the first negative meniscus lens 1 is made of lanthanum flint glass with the trade name of N-LAF 33.
The second negative meniscus lens 2 is made of dense crown glass with the brand name ZKN 7.
The third negative meniscus lens 3 is made of lanthanum crown glass with the brand number of N-LAK 34.
The first positive meniscus lens 4 is made of heavy flint glass with the designation SF 56A.
The first biconvex lens 5 is made of heavy flint glass with the brand number of N-KZFS 8.
The second biconvex lens 7 is made of fluorine crown glass and is named N-FK 56.
The second positive meniscus lens 8 is made of flint glass and is F2.
The third positive meniscus lens 9 is made of heavy flint glass with the brand number of N-SF 57.
Alternatively, the vertex radius of curvature and refractive index of each lens surface are exemplified by:
(1) the convex vertex radius of curvature of the first negative meniscus lens 1 is denoted as R1The refractive index of the convex surface of the first negative meniscus lens 1 is recorded as n1，18mm＜R1＜21mm，n11.8; the radius of curvature of the vertex of the concave surface of the first negative meniscus lens 1 is denoted as R2The refractive index of the concave surface of the first negative meniscus lens 1 is recorded as n2，13mm＜R2＜16mm，n2＝1。
(2) The convex vertex radius of curvature of the second negative meniscus lens 2 is denoted as R3The refractive index of the convex surface of the second negative meniscus lens 2 is recorded as n3，20mm＜R3＜25mm，n31.5; the radius of curvature of the concave apex of the second negative meniscus lens 2 is denoted as R4The radius of curvature of the vertex of the concave surface of the second negative meniscus lens 2 is denoted as n4，3mm＜R4＜5mm，n4＝1。
The convex vertex radius of curvature of the third negative meniscus lens 3 is denoted as R5The refractive index of the convex surface of the third negative meniscus lens 3 is denoted by n5，25mm＜R5＜30mm，n51.7; the radius of curvature of the vertex of the concave surface of the third negative meniscus lens 3 is denoted as R6The radius of curvature of the vertex of the concave surface of the third negative meniscus lens 3 is denoted as n6，3mm＜R6＜5mm，n6＝1。
(3) The convex vertex curvature radius of the first positive meniscus lens 4 is denoted as R7The refractive index of the convex surface of the first positive meniscus lens 4 is recorded as n7，3mm＜R7＜5mm，n7＝1.8。
The vertex curvature radius of the bonding surface of the first positive meniscus lens 4 and the first biconvex lens is denoted as R8The refractive index of the bonding surface of the first positive meniscus lens 4 and the first biconvex lens is recorded as n8，1mm＜R8＜3mm，n8＝1.7。
The radius of curvature of the vertex of the surface on the near imaging side of the first biconvex lens is recorded as R9The refractive index of the surface of the first biconvex lens at the near imaging side is n9，-80mm＜R9＜-70mm，n9＝1。
(4) The curvature radius of the vertex of the near-object side surface of the second biconvex lens is R10And the refractive index of the near-object side surface of the second biconvex lens is n10，1mm＜R10＜3mm，n10＝1.4。
The vertex curvature radius of the cemented surface of the second biconvex lens and the second positive meniscus lens 8 is denoted as R11Of a second biconvex lens and a second positive meniscus lens 8The refractive index of the cemented surface is denoted n11，-3mm＜R11＜-1mm，n11＝1.6。
The convex vertex radius of curvature of the second positive meniscus lens 8 is denoted as R12The refractive index of the convex surface of the second positive meniscus lens 8 is denoted by n12，-3mm＜R12＜-1mm，n12＝1。
(5) The radius of curvature of the vertex of the concave surface of the third positive meniscus lens 9 is denoted as R13The refractive index of the concave surface of the third positive meniscus lens 9 is recorded as n13，-3mm＜R13＜-1mm，n131.8. The convex vertex curvature radius of the third positive meniscus lens 9 is denoted as R14The refractive index of the convex surface of the third positive meniscus lens 9 is recorded as n14，-3mm＜R14＜-2mm，n14＝1。
Example 1
The embodiment provides a large-aperture panoramic shooting optical system as shown in fig. 1, and the optical system is provided based on the specific implementation mode. Wherein, the vertex curvature radius of each lens surface is specifically as follows:
R1＝18.1mm，R2＝13.5mm，k2＝-2.63(R2corresponding coefficient of quadratic term), R3＝20.5mm，R4＝4.3mm，k4＝-4.3(R4Corresponding coefficient of quadratic term), R5＝26.8mm，R6＝5.1mm，k6＝0.1(R6Corresponding coefficient of quadratic term), R7＝3.9mm，k7＝-1.26(R7Corresponding coefficient of quadratic term), R8＝2.05mm，R9＝-80mm，R10＝2.1mm，R11＝-2.6mm，R12＝-2.8mm，R13＝-2.9mm，R14＝-2.96mm。
The imaging field of view of the optical system provided by the embodiment is 150 degrees, and the F # is 2.03; the optical total length is 21.2mm, and the maximum aperture is less than or equal to 25 mm.
Example 2
The embodiment provides a large-aperture panoramic shooting optical system as shown in fig. 1, and the optical system is provided based on the specific implementation mode. Wherein, the vertex curvature radius of each lens surface is specifically as follows:
R1＝19.5mm，R2＝15.8mm，k2＝-2.93(R2corresponding coefficient of quadratic term), R3＝22.5mm，R4＝4.1mm，k4＝-4.3(R4Corresponding coefficient of quadratic term), R5＝25.6mm，R6＝3.1mm，k6＝0.1(R6Corresponding coefficient of quadratic term), R7＝4.1mm，k7＝-1.26(R7Corresponding quadratic coefficient), R8＝1.6mm，R9＝-75mm，R10＝2mm，R11＝-2.1mm，R12＝-1.9mm，R13＝-1.4mm，R14＝-2.9mm。
The imaging field of view of the optical system provided by the embodiment is 150 degrees, and the F # is 2.08; the optical total length is 21.8mm, and the maximum aperture is less than or equal to 25 mm.
Example 3
The embodiment provides a large-aperture panoramic shooting optical system as shown in fig. 1, and the optical system is provided based on the specific implementation mode. Wherein, the vertex curvature radius of each lens surface is specifically as follows:
R1＝20.6mm，R2＝12.1mm，k2＝-2.69(R2corresponding coefficient of quadratic term), R3＝24.6mm，R4＝3.5mm，k4＝-3.99(R4Corresponding coefficient of quadratic term), R5＝28.8mm，R6＝4.86mm，k6＝-0.45(R6Corresponding coefficient of quadratic term), R7＝4.93mm，k7＝-1.16(R7Corresponding coefficient of quadratic term), R8＝2.9mm，R9＝-70.56mm，R10＝2.96mm，R11＝-2.6mm，R12＝-2.99mm，R13＝-2.86mm，R14＝-2.7mm。
The imaging field of view of the optical system provided by the embodiment is 150 degrees, and the F # is 2.03; the optical total length is 20.1mm, and the maximum aperture is less than or equal to 25 mm.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. A large-aperture panoramic camera optical system is characterized in that the optical system comprises a first negative meniscus lens, a second negative meniscus lens, a third negative meniscus lens, a first positive meniscus lens, a first biconvex lens, a diaphragm, a second biconvex lens, a second positive meniscus lens and a third positive meniscus lens which are coaxially and sequentially arranged from an object side to an imaging side; the convex surfaces of the first negative meniscus lens, the second negative meniscus lens, the third negative meniscus lens, the first positive meniscus lens and the first biconvex lens face the object side, and the convex surfaces of the second biconvex lens, the second positive meniscus lens and the third positive meniscus lens face the image side.
2. The large aperture panoramic imaging optical system according to claim 1, wherein the outer edge of the concave surface of the second negative meniscus lens is glued to the outer edge of the convex surface of the third negative meniscus lens to form a first glue group;
the concave surface of the first positive meniscus lens and the convex surface of the first biconvex lens are tightly adhered and glued to form a second gluing group;
the convex surface of the second biconvex lens is clung to the concave surface of the second positive meniscus lens to form a third gluing group;
the first negative meniscus lens and the first gluing group are distributed at intervals, the first gluing group and the second gluing group are distributed at intervals, the second gluing group and the third gluing group are distributed at intervals, and the third gluing group and the third positive meniscus lens are distributed at intervals;
the air gap between the first negative meniscus lens and the first gluing group is 2 mm;
the air gap between the first gluing set and the second gluing set is 4.5 mm;
the air gap between the second gluing set and the third gluing set is 1.1 mm;
and the air gap between the third bonding group and the third positive meniscus lens is 0.2 mm.
3. The large aperture panoramic camera optical system of claim 2, wherein the first negative meniscus lens is made of lanthanum flint glass;
the second negative meniscus lens is made of dense crown glass;
the third negative meniscus lens is made of lanthanum crown glass;
the first positive meniscus lens, the first biconvex lens and the third positive meniscus lens are all made of heavy flint glass;
the second biconvex lens is made of fluorine crown glass;
the second positive meniscus lens is made of flint glass.
4. The large aperture panoramic imaging optical system according to claim 3, wherein the first negative meniscus lens is made of N-LAF 33;
the second negative meniscus lens is made of ZKN 7;
the third negative meniscus lens is made of N-LAK 34;
the first positive meniscus lens is made of SF 56A;
the first biconvex lens is made of N-KZFS 8;
the second biconvex lens is made of N-FK 56;
the second positive meniscus lens is made of F2;
the third positive meniscus lens is made of N-SF 57.
5. The large aperture panoramic imaging optical system of claim 2, wherein the first negative meniscus lens has a convex apex radius of curvature denoted as R1The convex surface of the first negative meniscus lens is curvedRefractive index n1，18mm＜R1＜21mm，n1＝1.8；
The radius of curvature of the vertex of the concave surface of the first negative meniscus lens is recorded as R2The refractive index of the concave surface of the first negative meniscus lens is recorded as n2，13mm＜R2＜16mm，n2＝1。
6. The large aperture panoramic imaging optical system of claim 2, wherein the convex vertex radius of curvature of the second negative meniscus lens is denoted as R3The refractive index of the convex surface of the second negative meniscus lens is recorded as n3，20mm＜R3＜25mm，n3＝1.5；
The radius of curvature of the vertex of the concave surface of the second negative meniscus lens is recorded as R4The radius of curvature of the vertex of the concave surface of the second negative meniscus lens is recorded as n4，3mm＜R4＜5mm，n4＝1；
The convex vertex curvature radius of the third negative meniscus lens is recorded as R5The refractive index of the convex surface of the third negative meniscus lens is recorded as n5，25mm＜R5＜30mm，n5＝1.7；
The radius of curvature of the vertex of the concave surface of the third negative meniscus lens is recorded as R6The radius of curvature of the vertex of the concave surface of the third negative meniscus lens is recorded as n6，3mm＜R6＜5mm，n6＝1。
7. The large aperture panoramic imaging optical system of claim 2, wherein the convex vertex radius of curvature of the first positive meniscus lens is denoted as R7The refractive index of the convex surface of the first positive meniscus lens is recorded as n7，3mm＜R7＜5mm，n7＝1.8；
The vertex curvature radius of the bonding surface of the first positive meniscus lens and the first biconvex lens is recorded as R8The refractive index of the bonding surface of the first positive meniscus lens and the first biconvex lens is recorded as n8，1mm＜R8＜3mm，n8＝1.7；
The curvature radius of the surface vertex at the near imaging side of the first biconvex lens is recorded as R9The surface refractive index of the first biconvex lens at the near imaging side is recorded as n9，-80mm＜R9＜-70mm，n9＝1。
8. The large aperture panoramic imaging optical system according to claim 2, wherein the radius of curvature of the vertex of the surface of the second biconvex lens on the side close to the object is denoted as R10The refractive index of the near-object side surface of the second biconvex lens is n10，1mm＜R10＜3mm，n10＝1.4；
The vertex curvature radius of the bonding surface of the second biconvex lens and the second positive meniscus lens is recorded as R11The refractive index of the bonding surface of the second biconvex lens and the second positive meniscus lens is recorded as n11，-3mm＜R11＜-1mm，n11＝1.6；
The convex vertex curvature radius of the second positive meniscus lens is recorded as R12The refractive index of the convex surface of the second positive meniscus lens is recorded as n12，-3mm＜R12＜-1mm，n12＝1。
9. The large aperture panoramic imaging optical system according to claim 2, wherein the radius of curvature of the vertex of the concave surface of the third positive meniscus lens is R13The refractive index of the concave surface of the third positive meniscus lens is recorded as n13，-3mm＜R13＜-1mm，n13＝1.8；
The convex vertex curvature radius of the third positive meniscus lens is recorded as R14The refractive index of the convex surface of the third positive meniscus lens is recorded as n14，-3mm＜R14＜-2mm，n14＝1。
10. The large aperture panoramic imaging optical system of claim 1, wherein the imaging field of view of the optical system is 150 °;
the F # of the optical system is 2.08;
the total optical length of the optical system is less than or equal to 22 mm;
the maximum aperture of the optical system is less than or equal to 25 mm.
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