CN115145009A - Lens and camera device - Google Patents
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- CN115145009A CN115145009A CN202211072580.6A CN202211072580A CN115145009A CN 115145009 A CN115145009 A CN 115145009A CN 202211072580 A CN202211072580 A CN 202211072580A CN 115145009 A CN115145009 A CN 115145009A
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Abstract
The invention discloses a lens and a camera device, which are formed by sequentially arranging a first lens group, a second lens group, a third positive focal power lens, a fourth positive focal power lens, a third lens group, an aperture diaphragm, a fourth negative focal power lens, a fourth lens group, an eighth positive focal power lens, a ninth positive focal power lens and a light splitting device from an object side to an image side; each light emitting side of the light splitting device sequentially comprises an optical filter and an image plane; the lens group satisfies the following conditions:
(ii) a Wherein f is G2 Is the focal length of the second lens group, f G3 F is the focal length of the third lens group, f is the focal length of the lens, and FOV is the angle of view of the lens. The optical lens has the characteristics of high resolving power, large target surface, large aperture, miniaturization, low cost and the like.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to a lens and a camera device.
Background
Thanks to the rapid development of the security and surveillance field in recent years, the optical lens is increasingly applied in the security and surveillance field, and especially in the fields of intelligent buildings, intelligent transportation and the like, the pixel requirement of the optical imaging lens is increasingly high. Meanwhile, platforms benefiting from the double-photosensitive component technology are more mature in use, and the lens is developed towards the direction of double light paths.
With the rapid development of the security protection field, compared with a zoom lens, a fixed focus lens has more stable optical performance, and the demand of the fixed focus lens is the highest. However, the following problems still exist in the current optical imaging lens: 1. the existing lens has small size of an imaging target surface and low resolution of an acquired image. 2. The lens aperture is small, and under the condition of low illumination, the image of the camera is dark, so that the product adaptability is reduced. 3. The number of lenses is large, and the size of the lens is large, so that the whole camera cannot be designed in a miniaturized mode. 4. The lens resolution is not high, and the imaging quality is general. 5. The stability of the properties at high and low temperatures is not good.
Therefore, there is a need for an optical lens with high resolution and large target area, large aperture, small size and low cost.
Disclosure of Invention
The embodiment of the invention provides a lens and a camera device, which are used for providing an optical lens with high resolving power and the characteristics of large target surface, large aperture, miniaturization, low cost and the like.
The embodiment of the present invention provides a lens assembly, which includes a first lens group, a second lens group, a third positive power lens, a fourth positive power lens, a third lens group, an aperture stop, a fourth negative power lens, a fourth lens group, an eighth positive power lens, a ninth positive power lens, and a beam splitter, which are sequentially arranged from an object side to an image side; each light emitting side of the light splitting device sequentially comprises a light filter and an image plane;
the lens group satisfies the following conditions:
wherein, f G2 Is the focal length of the second lens group, f G3 F is the focal length of the third lens group, f is the focal length of the lens, and FOV is the field angle of the lens;
the first lens group is composed of a first positive focal power lens and a first negative focal power lens which are arranged in sequence from the object side to the image side;
the second lens group consists of a second negative focal power lens and a second positive focal power lens which are arranged in sequence from the object side to the image side;
the third lens group is composed of a fifth positive focal power lens and a third negative focal power lens which are arranged in sequence from the object side to the image side;
the fourth lens group is composed of a sixth positive focal power lens, a fifth negative focal power lens and a seventh positive focal power lens which are arranged in sequence from the object side to the image side.
Further, the first positive power lens is a biconvex lens;
the first negative focal power the lens is a biconcave lens;
the second negative focal power lens is a biconcave lens;
the second positive focal power lens is a biconvex lens;
the third positive focal power lens is a biconvex lens;
the fourth positive focal power lens is a meniscus lens, and one surface of the fourth positive focal power lens facing the object side is a convex surface;
the fifth positive focal power lens is a biconvex lens;
the third negative focal power lens is a biconcave lens;
the fourth negative power lens is a meniscus lens, and one surface of the fourth negative power lens facing the object side is a convex surface;
the sixth positive focal power lens is a meniscus lens, and one surface of the sixth positive focal power lens facing the image side is a convex surface;
the fifth negative focal power lens is a biconcave lens;
the seventh positive focal power lens is a biconvex lens;
the eighth positive focal power lens is a biconvex lens;
the ninth positive power lens is a meniscus lens, and one surface of the ninth positive power lens facing the object side is a convex surface.
Further, the first positive power lens and the first negative power lens constitute a cemented lens group;
the second negative focal power lens and the second positive focal power lens form a cemented lens group;
the fifth positive focal power lens and the third negative focal power lens form a cemented lens group;
and the sixth positive focal power lens, the fifth negative focal power lens and the seventh positive focal power lens form a cemented lens group.
Further, a central curvature radius R10 of the image side surface of the fourth positive power lens and a central curvature radius R11 of the object side surface of the fifth positive power lens satisfy:
。
further, a distance TTL from the object plane side of the first positive power lens to the image plane and a focal length f of the lens satisfy:
。
further, f4 of the focal length of the second positive power lens, f5 of the focal length of the third positive power lens, and f14 of the focal length of the ninth positive power lens satisfy: f4 is less than or equal to 58; f5 is less than or equal to 42; f14 is less than or equal to 96.
Further, abbe number Vd6 of the fourth positive power lens, abbe number Vd9 of the fourth negative power lens, and abbe number Vd10 of the sixth positive power lens satisfy: vd6 is less than or equal to 69; vd9 is less than or equal to 82; vd10 is less than or equal to 69.
Further, the refractive index Nd7 of the fifth positive power lens, the refractive index Nd8 of the third negative power lens, and the refractive index Nd11 of the fifth negative power lens satisfy: nd7 is less than or equal to 1.95; nd8 is less than or equal to 1.54; nd11 is less than or equal to 1.85.
Further, the light splitting device comprises two prisms, and the joint surfaces of the two prisms are provided with film layers with light splitting functions.
In another aspect, an embodiment of the present invention provides an imaging apparatus including: imaging is performed by using the lens barrel of any one of the above.
An embodiment of the present invention provides a lens and an image pickup apparatus, where the lens is configured to be disposed from an object sideThe first lens group, the second lens group, the third positive focal power lens, the fourth positive focal power lens, the third lens group, the aperture diaphragm, the fourth negative focal power lens, the fourth lens group, the eighth positive focal power lens, the ninth positive focal power lens and the light splitting device are arranged in sequence from the image side; each light emitting side of the light splitting device sequentially comprises a light filter and an image plane; the lens group satisfies the following conditions:
(ii) a Wherein, f G2 Is the focal length of the second lens group, f G3 F is the focal length of the third lens group, f is the focal length of the lens, and FOV is the angle of view of the lens. Since in the embodiment of the present invention, 14 lenses of specific power are arranged in the lens in order from the object side to the image side in a specific order, and the lens group in the lens satisfies:
(ii) a The optical lens has the characteristics of high resolving power, large target surface, large aperture, miniaturization, low cost and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic view of a lens structure according to an embodiment of the present invention;
fig. 2 is a graph of an optical transfer function (MTF) of a lens in a first configuration visible light band according to embodiment 1 of the present invention;
fig. 3 is a field curvature and distortion diagram of a lens provided in embodiment 1 of the present invention in a visible light band;
fig. 4 is a transverse fan diagram of a lens provided in embodiment 1 of the present invention in a visible light band;
fig. 5 is a dot diagram of a lens provided in embodiment 1 of the present invention in a visible light band;
fig. 6 is a graph of an optical transfer function (MTF) of a lens in a second configuration near-infrared optical band according to embodiment 1 of the present invention;
fig. 7 is a graph of an optical transfer function (MTF) of a lens in a first configuration visible light band according to embodiment 2 of the present invention;
fig. 8 is a field curvature and distortion diagram of a lens provided in embodiment 2 of the present invention in a visible light band;
fig. 9 is a transverse fan diagram of a lens provided in embodiment 2 of the present invention in a visible light band;
fig. 10 is a dot diagram of a lens provided in embodiment 2 of the present invention in a visible light band;
fig. 11 is a graph illustrating an optical transfer function (MTF) of a lens in a second configuration near-infrared optical band according to embodiment 2 of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings, in which it is apparent that the described embodiments are only some, but not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Fig. 1 is a schematic view of a lens barrel according to embodiment 1 of the present invention, which includes a first lens group G1, a second lens group G2, a third positive power lens L5, a fourth positive power lens L6, a third lens group G3, an aperture stop P, a fourth negative power lens L9, a fourth lens group G4, an eighth positive power lens L13, a ninth positive power lens L14, and a light splitting device Q, arranged in order from an object side to an image side; each light emitting side of the light splitting device Q sequentially comprises an optical filter M and an image plane N;
the lens group satisfies the following conditions:
wherein f is G2 Is the focal length of the second lens group, f G3 F is the focal length of the third lens group, f is the focal length of the lens, and FOV is the field angle of the lens;
the first lens group G1 consists of a first positive focal power lens L1 and a first negative focal power lens L2 which are arranged in sequence from the object side to the image side;
the second lens group G2 consists of a second negative power lens L3 and a second positive power lens L4 which are arranged in sequence from the object side to the image side;
the third lens group G3 consists of a fifth positive focal power lens L7 and a third negative focal power lens L8 which are arranged in sequence from the object side to the image side;
the fourth lens group G4 is composed of a sixth positive power lens L10, a fifth negative power lens L11, and a seventh positive power lens L12 arranged in this order from the object side to the image side.
The light splitting device comprises two prisms, and the joint surfaces L of the two prisms are provided with film layers with light splitting functions.
The aperture size of the aperture diaphragm determines the aperture value of the system and the depth of field during shooting, the aperture size can be fixed, or the aperture diaphragm with adjustable aperture can be placed according to the requirement to realize the adjustment of the clear aperture, namely the purpose of changing the aperture value of the system and the depth of field is achieved.
Since in the embodiment of the present invention, 14 lenses of specific power are arranged in the lens barrel in order from the object side to the image side in a specific order, and the lens group in the lens barrel satisfies:
(ii) a The optical lens has the characteristics of high resolution, large target surface, large aperture, miniaturization, low cost and the like.
In order to further improve the imaging quality of the lens, in the embodiment of the invention, the first positive power lens is a biconvex lens;
the first negative focal power lens is a biconcave lens;
the second negative focal power lens is a biconcave lens;
the second positive focal power lens is a biconvex lens;
the third positive focal power lens is a biconvex lens;
the fourth positive focal power lens is a meniscus lens, and one surface of the fourth positive focal power lens facing the object side is a convex surface;
the fifth positive focal power lens is a biconvex lens;
the third negative focal power lens is a biconcave lens;
the fourth negative-power lens is a meniscus lens, and one surface of the fourth negative-power lens, which faces the object side, is a convex surface;
the sixth positive focal power lens is a meniscus lens, and one surface of the sixth positive focal power lens facing the image side is a convex surface;
the fifth negative focal power lens is a biconcave lens;
the seventh positive focal power lens is a biconvex lens;
the eighth positive focal power lens is a biconvex lens;
the ninth positive power lens is a meniscus lens, and one surface of the ninth positive power lens facing the object side is a convex surface.
In order to further enable the system to be compact, in the embodiment of the present invention, the first positive power lens and the first negative power lens constitute a cemented lens group;
the second negative focal power lens and the second positive focal power lens form a cemented lens group;
the fifth positive focal power lens and the third negative focal power lens form a cemented lens group;
and the sixth positive focal power lens, the fifth negative focal power lens and the seventh positive focal power lens form a cemented lens group.
In order to further improve the imaging quality of the lens and improve the processing performance of the lens, in the embodiment of the invention, the central curvature radius R10 of the image side surface of the fourth positive power lens and the central curvature radius R11 of the object side surface of the fifth positive power lens satisfy the following condition:
。
to further enable the system to be compact, in an embodiment of the invention, the first positive power lens is on the object plane sideThe distance TTL from the image plane and the focal length f of the lens meet the following conditions:
。
in order to further improve the imaging quality of the lens, in the embodiment of the present invention, f4 of the focal length of the second positive power lens, f5 of the focal length of the third positive power lens, and f14 of the focal length of the ninth positive power lens satisfy: f4 is less than or equal to 58; f5 is less than or equal to 42; f14 is less than or equal to 96.
In the embodiment of the present invention, in order to enable a lens to clearly image in a relatively large temperature range, in the embodiment of the present invention, an abbe number Vd6 of a fourth positive power lens, an abbe number Vd9 of a fourth negative power lens, and an abbe number Vd10 of a sixth positive power lens satisfy: vd6 is less than or equal to 69; vd9 is less than or equal to 82; vd10 is less than or equal to 69. In addition, the following are satisfied: vd6 is less than or equal to 69; vd9 is less than or equal to 82; vd10 ≦ 69 may also reduce the color difference of the image, thereby improving the imaging quality.
In order to improve the imaging quality of the lens and reduce the total length of the lens, in the embodiment of the invention, the refractive index Nd7 of the fifth positive power lens, the refractive index Nd8 of the third negative power lens and the refractive index Nd11 of the fifth negative power lens satisfy: nd7 is less than or equal to 1.95; nd8 is less than or equal to 1.54; nd11 is less than or equal to 1.85. And, satisfies: nd7 is less than or equal to 1.95; nd8 is less than or equal to 1.54; the Nd11 is less than or equal to 1.85, so that the spherical aberration can be reduced, and the imaging quality is improved.
On the other hand, an embodiment of the present invention provides an imaging apparatus including: the lens is adopted for imaging.
The optical performance of the lens provided by the embodiment of the invention is as follows:
the lens imaging target surface can support 1.1 inches at most, and the imaging quality is ensured while the miniaturization of the lens structure is effectively realized by adopting a double-light-path design scheme. The imaging can be used by a sensor which can support the target surface by 1.1 inches at most, and the total mechanical length of a lens does not exceed 124.5mm; under the condition that the full-field MTF value of the visible light wave band is 100lp/mm, the full-field MTF value reaches more than 0.6; the lens has the advantages of less lens number, good processability and low cost control; the aperture is large, the F number is 1.4, and the device is particularly suitable for monitoring requirements under the low-illumination condition; the optical property is stable, and the requirements under the high and low temperature working conditions of minus 30 to plus 70 ℃ are met.
The following exemplifies the lens parameters provided by the embodiment of the present invention.
Example 1:
in a specific implementation process, the curvature radius R, the center thickness Tc, the refractive index Nd, the abbe constant Vd and the conic coefficient k of each lens of the lens barrel satisfy the conditions listed in table 1:
TABLE 1
Note that the mirror numbers in table 1 are the numbers of the left to right lenses in the schematic view of the lens configuration shown in fig. 1.
The lens provided by the embodiment has the following optical technical indexes:
the total optical length TTL is less than or equal to 121.5 mm;
focal length f of the lens: 20.8mm;
angle of view of lens: 48 degrees;
optical distortion of the lens: -4.61%;
aperture fno of lens: 1.44;
image plane size of the lens: 1.1'.
In embodiment 1 of the present invention, the focal length of the second lens group G2 of the optical lens is f G2 (ii) a The focal length of the third lens group G3 is f G3 (ii) a The focal length of the lens is f, and the field angle is FOV; satisfies the following conditions:
(ii) a The central curvature radius R10 of the image side surface of the lens L6 of the optical lens and the central curvature radius R11 of the object side surface of the lens L7 satisfy the following conditions:
(ii) a The focal length f of the optical lens and the total optical length TTL of the optical lens meet the following conditions:
(ii) a F4=37.02 for the focal length of lens L4, f5=41.13 for the focal length of lens L5, f14=95.43 for the focal length of lens L14 of the optical lens; an abbe number Vd6=17.98 of a lens L6 of the optical lens, an abbe number Vd9=81.60 of a lens L9, and an abbe number Vd10=63.40 of a lens L10; the refractive index Nd7=1.59 of the lens L7 of the optical lens, the refractive index Nd8=1.53 of the lens L8, and the refractive index Nd11=1.80 of the lens L11.
Example 2:
in a specific implementation process, the curvature radius R, the center thickness Tc, the refractive index Nd, the abbe constant Vd and the conic coefficient k of each lens of the lens barrel satisfy the conditions listed in table 2:
TABLE 2
Note that the mirror numbers in table 2 are the numbers of the left to right lenses in the schematic view of the lens configuration shown in fig. 1.
The lens provided by the embodiment has the following optical technical indexes:
the total optical length TTL is less than or equal to 124.5mm;
focal length f of the lens: 20.8mm;
angle of view of lens: 48.0 degrees;
optical distortion of the lens: -4.6%;
aperture fno of lens: 1.44;
image plane size of the lens: 1.1'.
In embodiment 2 of the present invention, the focal length of the second lens group G2 of the optical lens is f G2 (ii) a The third lens group G3 has a focal length f G3 (ii) a Focal length of the lens is f, and angle of view is FOV(ii) a Satisfies the following conditions:
(ii) a The central curvature radius R10 of the image side surface of the lens L6 of the optical lens and the central curvature radius R11 of the object side surface of the lens L7 satisfy that:
(ii) a The focal length f of the optical lens and the total optical length TTL of the optical lens meet the following conditions:
(ii) a F4=57.75 of the focal length of lens L4, f5=37.21 of the focal length of lens L5, f14=73.37 of the focal length of lens L14 of the optical lens; an abbe number Vd6=68.62 of a lens L6 of the optical lens, an abbe number Vd9=70.41 of a lens L9, and an abbe number Vd10=68.62 of a lens L10; the refractive index Nd7=1.94 of the lens L7 of the optical lens, the refractive index Nd8=1.51 of the lens L8, and the refractive index Nd11=1.84 of the lens L11.
In summary, examples 1 to 2 each satisfy the relationship shown in table 3 below.
TABLE 3
The lens provided by the embodiment is further described below by performing a detailed optical system analysis on the embodiment.
The optical transfer function is used for evaluating the imaging quality of an optical system in a more accurate, visual and common mode, and the higher and smoother curve of the optical transfer function indicates that the imaging quality of the system is better, and aberration is well corrected.
Fig. 1 is a schematic view of a lens structure according to an embodiment of the present invention;
as shown in fig. 2, a graph of an optical transfer function (MTF) of the lens provided in embodiment 1 of the present invention in a first configuration visible light band;
as shown in fig. 3, a field curvature and distortion diagram of the lens provided in embodiment 1 of the present invention in the visible light band;
as shown in fig. 4, a transverse light fan diagram of the lens provided in embodiment 1 of the present invention in the visible light band;
as shown in fig. 5, a dot diagram of a lens provided in embodiment 1 of the present invention in a visible light band;
as shown in fig. 6, a graph of an optical transfer function (MTF) of the lens provided in embodiment 1 in a second configuration near-infrared optical band;
as shown in fig. 7, a graph of an optical transfer function (MTF) of the lens provided in embodiment 2 of the present invention in a first configuration visible light band;
as shown in fig. 8, a field curvature and a distortion diagram of the lens provided in embodiment 2 of the present invention in the visible light band;
as shown in fig. 9, a transverse light fan diagram of the lens provided in embodiment 2 of the present invention in the visible light band;
as shown in fig. 10, a dot-column diagram of a lens provided in embodiment 2 of the present invention in a visible light band;
as shown in fig. 11, a graph of an optical transfer function (MTF) of the lens provided in embodiment 2 of the present invention in a second configuration near-infrared optical band is shown.
As can be seen from fig. 2, the optical transfer function (MTF) curve of the lens in the normal temperature state in the visible light portion is smooth and concentrated, and the average MTF value of the full field of view (half-image height Y' =8.8 mm) is above 0.6; therefore, the lens provided by the embodiment of the invention can meet higher imaging requirements.
As can be seen from fig. 6, the optical transfer function (MTF) curve of the lens in the near-infrared light portion at normal temperature state is relatively smooth and concentrated, and the average MTF value of the full field of view (half-image height Y' =8.8 mm) reaches above 0.4; therefore, the lens provided by the embodiment of the invention can meet higher imaging requirements.
As can be seen from fig. 7, the optical transfer function (MTF) curve of the lens in the visible light portion at normal temperature state is relatively smooth and concentrated, and the average MTF value of the full field (half image height Y' =8.8 mm) reaches above 0.6; therefore, the lens provided by the embodiment of the invention can meet higher imaging requirements.
As can be seen from fig. 11, the optical transfer function (MTF) curve of the lens in the near-infrared light portion at normal temperature state is relatively smooth and concentrated, and the average MTF value of the full field of view (half image height Y' =8.8 mm) reaches above 0.4; therefore, the lens provided by the embodiment of the invention can meet higher imaging requirements.
As can be seen from fig. 3 and 8, the curvature of field of the lens is controlled within ± 0.03 mm. The curvature of field is also called as "curvature of field". When the lens has field curvature, the intersection point of the whole light beam is not overlapped with an ideal image point, and although a clear image point can be obtained at each specific point, the whole image plane is a curved surface. T represents the meridional field curvature, and S represents the sagittal field curvature. The field curvature curve shows the distance of the current focal plane or image plane to the paraxial focal plane as a function of field coordinates, and the meridional field curvature data is the distance from the currently determined focal plane to the paraxial focal plane measured along the Z axis and measured in the meridional (YZ plane). Sagittal curvature of field data measures distances measured in a plane perpendicular to the meridian plane, the base line in the schematic is on the optical axis, the top of the curve represents the maximum field of view (angle or height), and no units are set on the vertical axis, since the curve is always normalized by the maximum radial field of view.
As can be seen from fig. 3 and 8, the lens distortion control is better, within-5.0%. Fig. 3 shows the coincidence in fig. 3 with reference to the curves of a plurality of wavelengths (0.436 um, 0.486 um, 0.546 um, 0.587 um, and 0.656 um). In general, lens distortion is actually a general term of perspective distortion inherent in an optical lens, that is, distortion due to perspective, and the distortion is very unfavorable for the imaging quality of a photograph, and after all, the purpose of photography is to reproduce rather than exaggerate, but because the distortion is inherent in a lens (converging light rays of a convex lens and diverging light rays of a concave lens), the distortion cannot be eliminated and can only be improved. As can be seen from fig. 8, the distortion of the lens provided in embodiment 1 of the present invention is-4.6%; the distortion of the lens provided by the embodiment 2 of the invention is-4.6%; the distortion is set to balance the focal length, the field angle and the size of the target surface of the corresponding camera, and the deformation caused by the distortion can be corrected through post image processing.
As can be seen from fig. 4 and 9, the curves in the sector diagrams are more concentrated, and the spherical aberration and the chromatic dispersion of the lens are better controlled. In fig. 4 and 9, EX denotes an X-direction aberration, EY denotes a Y-direction aberration, PX denotes normalized X-direction pupil coordinates, and PY denotes normalized Y-direction pupil coordinates. As can be seen from fig. 5 and 10, the lens has a small and relatively concentrated light spot radius, and the corresponding aberration and coma are also good.
The embodiment of the invention provides a lens and an image pickup device, wherein the lens is composed of a first lens group, a second lens group, a third positive power lens, a fourth positive power lens, a third lens group, an aperture diaphragm, a fourth negative power lens, a fourth lens group, an eighth positive power lens, a ninth positive power lens and a light splitting device which are sequentially arranged from an object side to an image side; each light emitting side of the light splitting device sequentially comprises an optical filter and an image plane; the lens group satisfies the following conditions:
(ii) a Wherein, f G2 Is the focal length of the second lens group, f G3 F is the focal length of the third lens group, and FOV is the field angle of the lens. Since in the embodiment of the present invention, 14 lenses of specific power are arranged in the lens in order from the object side to the image side in a specific order, and the lens group in the lens satisfies:
(ii) a The optical lens has the characteristics of high resolving power, large target surface, large aperture, miniaturization, low cost and the like.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The lens is characterized in that the lens is composed of a first lens group, a second lens group, a third positive focal power lens, a fourth positive focal power lens, a third lens group, an aperture diaphragm, a fourth negative focal power lens, a fourth lens group, an eighth positive focal power lens, a ninth positive focal power lens and a light splitting device which are sequentially arranged from an object side to an image side; each light emitting side of the light splitting device sequentially comprises an optical filter and an image plane;
the lens group satisfies the following conditions:
wherein, f G2 Is the focal length of the second lens group, f G3 F is the focal length of the third lens group, f is the focal length of the lens, and FOV is the field angle of the lens;
the first lens group is composed of a first positive focal power lens and a first negative focal power lens which are arranged in sequence from the object side to the image side;
the second lens group consists of a second negative focal power lens and a second positive focal power lens which are arranged in sequence from the object side to the image side;
the third lens group is composed of a fifth positive focal power lens and a third negative focal power lens which are arranged in sequence from the object side to the image side;
the fourth lens group is composed of a sixth positive focal power lens, a fifth negative focal power lens and a seventh positive focal power lens which are arranged in sequence from the object side to the image side.
2. The lens barrel as claimed in claim 1, wherein the first positive power lens is a biconvex lens;
the first negative focal power lens is a biconcave lens;
the second negative focal power lens is a biconcave lens;
the second positive focal power lens is a biconvex lens;
the third positive focal power lens is a biconvex lens;
the fourth positive focal power lens is a meniscus lens, and one surface of the fourth positive focal power lens facing the object side is a convex surface;
the fifth positive focal power lens is a biconvex lens;
the third negative focal power lens is a biconcave lens;
the fourth negative-power lens is a meniscus lens, and one surface of the fourth negative-power lens, which faces the object side, is a convex surface;
the sixth positive focal power lens is a meniscus lens, and one surface of the sixth positive focal power lens facing the image side is a convex surface;
the fifth negative focal power lens is a biconcave lens;
the seventh positive focal power lens is a biconvex lens;
the eighth positive focal power lens is a biconvex lens;
the ninth positive power lens is a meniscus lens, and one surface of the ninth positive power lens facing the object side is a convex surface.
3. The lens barrel according to claim 1, wherein the first positive power lens and the first negative power lens constitute a cemented lens group;
the second negative focal power lens and the second positive focal power lens form a cemented lens group;
the fifth positive focal power lens and the third negative focal power lens form a cemented lens group;
and the sixth positive focal power lens, the fifth negative focal power lens and the seventh positive focal power lens form a cemented lens group.
4. The lens barrel according to claim 1, wherein a center radius of curvature R10 of an image side surface of the fourth positive power lens and a center radius of curvature R11 of an object side surface of the fifth positive power lens satisfy:
。
5. the lens barrel according to claim 1, wherein a distance TTL between an object plane side of the first positive power lens and an image plane and a focal length f of the lens barrel satisfy:
。
6. the lens barrel according to claim 1, wherein f4 of the focal length of the second positive power lens, f5 of the focal length of the third positive power lens, and f14 of the focal length of the ninth positive power lens satisfy: f4 is less than or equal to 58; f5 is less than or equal to 42; f14 is less than or equal to 96.
7. The lens barrel according to claim 1, wherein an abbe number Vd6 of the fourth positive power lens, an abbe number Vd9 of the fourth negative power lens, and an abbe number Vd10 of the sixth positive power lens satisfy: vd6 is less than or equal to 69; vd9 is less than or equal to 82; vd10 is less than or equal to 69.
8. The lens barrel according to claim 1, wherein a refractive index Nd7 of the fifth positive power lens, a refractive index Nd8 of the third negative power lens, and a refractive index Nd11 of the fifth negative power lens satisfy: nd7 is less than or equal to 1.95; nd8 is less than or equal to 1.54; nd11 is less than or equal to 1.85.
9. The lens barrel according to claim 1, wherein the light splitting means includes two prisms, and a joining surface of the two prisms is provided with a film layer having a light splitting function.
10. An image pickup apparatus, comprising: imaging is performed using the lens barrel of any one of the above claims 1 to 9.
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| CN202211072580.6A CN115145009B (en) | 2022-09-02 | 2022-09-02 | Lens and camera device |
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| CN202211072580.6A CN115145009B (en) | 2022-09-02 | 2022-09-02 | Lens and camera device |
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| CN115145009B CN115145009B (en) | 2022-11-22 |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6115194A (en) * | 1998-07-23 | 2000-09-05 | Fuji Photo Optical Co., Ltd. | Projection lens |
| JP2013195637A (en) * | 2012-03-19 | 2013-09-30 | Ricoh Co Ltd | Imaging lens system, image capturing device, and information device |
| US20150022901A1 (en) * | 2012-04-09 | 2015-01-22 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| CN106814440A (en) * | 2015-11-30 | 2017-06-09 | 佳能株式会社 | Converter device and image capture apparatus |
| CN207396836U (en) * | 2017-09-19 | 2018-05-22 | 浙江大华技术股份有限公司 | A kind of lens system and camera lens |
| CN211014811U (en) * | 2019-11-14 | 2020-07-14 | 舜宇光学(中山)有限公司 | Imaging lens |
| CN111830677A (en) * | 2020-07-13 | 2020-10-27 | 浙江大华技术股份有限公司 | Lens |
| CN212965592U (en) * | 2020-07-07 | 2021-04-13 | 深圳爱酷智能科技有限公司 | Iris zooming imaging lens, iris zooming imaging module and iris recognition device |
| CN113219631A (en) * | 2021-04-30 | 2021-08-06 | 江西凤凰光学科技有限公司 | Long-focus optical lens |
| CN113777765A (en) * | 2021-08-25 | 2021-12-10 | 浙江大华技术股份有限公司 | Lens |
| CN114063267A (en) * | 2020-07-31 | 2022-02-18 | 大立光电股份有限公司 | Image lens assembly, zoom image capturing device and electronic device |
| CN114859532A (en) * | 2022-03-28 | 2022-08-05 | 浙江大华技术股份有限公司 | Lens and camera device |
-
2022
- 2022-09-02 CN CN202211072580.6A patent/CN115145009B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6115194A (en) * | 1998-07-23 | 2000-09-05 | Fuji Photo Optical Co., Ltd. | Projection lens |
| JP2013195637A (en) * | 2012-03-19 | 2013-09-30 | Ricoh Co Ltd | Imaging lens system, image capturing device, and information device |
| US20150022901A1 (en) * | 2012-04-09 | 2015-01-22 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| CN106814440A (en) * | 2015-11-30 | 2017-06-09 | 佳能株式会社 | Converter device and image capture apparatus |
| CN207396836U (en) * | 2017-09-19 | 2018-05-22 | 浙江大华技术股份有限公司 | A kind of lens system and camera lens |
| CN211014811U (en) * | 2019-11-14 | 2020-07-14 | 舜宇光学(中山)有限公司 | Imaging lens |
| CN212965592U (en) * | 2020-07-07 | 2021-04-13 | 深圳爱酷智能科技有限公司 | Iris zooming imaging lens, iris zooming imaging module and iris recognition device |
| CN111830677A (en) * | 2020-07-13 | 2020-10-27 | 浙江大华技术股份有限公司 | Lens |
| CN114063267A (en) * | 2020-07-31 | 2022-02-18 | 大立光电股份有限公司 | Image lens assembly, zoom image capturing device and electronic device |
| CN113219631A (en) * | 2021-04-30 | 2021-08-06 | 江西凤凰光学科技有限公司 | Long-focus optical lens |
| CN113777765A (en) * | 2021-08-25 | 2021-12-10 | 浙江大华技术股份有限公司 | Lens |
| CN114859532A (en) * | 2022-03-28 | 2022-08-05 | 浙江大华技术股份有限公司 | Lens and camera device |
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