CN114355591B - Large-zoom-ratio microminiaturized airborne nacelle optical system - Google Patents
Large-zoom-ratio microminiaturized airborne nacelle optical system Download PDFInfo
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- CN114355591B CN114355591B CN202111627104.1A CN202111627104A CN114355591B CN 114355591 B CN114355591 B CN 114355591B CN 202111627104 A CN202111627104 A CN 202111627104A CN 114355591 B CN114355591 B CN 114355591B
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Abstract
The application relates to a large-zoom-ratio microminiaturized airborne pod optical system, which is sequentially provided with a fixed group A with positive focal power, a variable group B with negative focal power, a fixed group C with positive focal power and a compensation group D with positive focal power along the incidence direction of light rays; the fixed group A comprises a negative focal power lens A1, a positive focal power lens A2, a positive focal power lens A3, a positive focal power lens A4 and a positive focal power lens A5 which are sequentially arranged along the incidence direction of light rays; the zoom group B comprises a negative focal power lens B1, a lens B2 and a lens B3 which are sequentially arranged along the incidence direction of light rays; the fixed group C comprises a positive focal power lens C1 and a lens C2 which are sequentially arranged along the incident direction of light rays; the compensation group D includes a lens D1, a lens D2, a lens D3, a lens D4, and a positive power lens D5, which are sequentially disposed in the light incident direction. The ratio of the total length to the length Jiao Jiaoju of the optical system is smaller than 0.67, so that microminiaturization is realized.
Description
Technical Field
The application relates to the technical field of photoelectricity, in particular to a high-zoom-ratio microminiaturized airborne nacelle optical system.
Background
In view of local warfare in the recent several worlds, mastering the development of the battlefield situation and the battlefield information of instantaneous change are key to acquiring the initiative of the battlefield and are also important interest devices for acquiring the victory of the battlefield, and to achieve the aim, system equipment capable of accurately acquiring the information in real time is required. In recent years, the airborne photoelectric pod has become an important point of attention at home and abroad due to the advantage of flexibility and rapidness.
In the military reconnaissance process, each country is always dedicated to expanding the reconnaissance radius, hopes to acquire enemy information in advance, discovers enemy first and operates enemy first, so as to grasp the battlefield movement and provide powerful guarantee for the country to grasp the war initiative. Thus, a long focal length becomes a necessary condition for the onboard pod optical system; meanwhile, in order to expand the search range, a large field of view is also a pursuit target of the onboard pod optical system. However, the existing onboard pod optical system cannot achieve microminiaturization while satisfying a large zoom ratio, limited to the use environment.
Disclosure of Invention
In view of the above, the application aims to provide a high-zoom-ratio microminiaturized airborne pod optical system; realizing large zoom ratio and microminiaturization.
The application is realized by adopting the following scheme: the lens with the focal power of the optical system consists of a fixed group A with positive focal power, a variable group B with negative focal power, a fixed group C with positive focal power and a compensation group D with positive focal power, which are sequentially arranged along the incidence direction of light rays, or consists of a fixed group A with positive focal power, a variable group B with negative focal power, a fixed group C with positive focal power, a compensation group D with positive focal power and a fixed group E with negative focal power, which are sequentially arranged along the incidence direction of light rays; the fixed group A consists of a negative focal power lens A1, a positive focal power lens A2, a positive focal power lens A3, a positive focal power lens A4 and a positive focal power lens A5 which are sequentially arranged along the incidence direction of light rays; the variable magnification group B consists of a negative focal power lens B1, a lens B2 and a lens B3 which are sequentially arranged along the incidence direction of light rays; the fixed group C comprises a positive focal power lens C1 and a lens C2 which are sequentially arranged along the incidence direction of light rays; the compensation group D consists of a lens D1, a lens D2, a lens D3, a lens D4 and a positive focal power lens D5 which are sequentially arranged along the incidence direction of light rays; the fixed group E adopts a negative focal power lens E1.
Further, the fixed group C includes a lens C3 located behind the lens C2.
Further, the fixed group C includes a lens C4 located behind the lens C3.
Further, the ratio of the total length to the length Jiao Jiaoju of the optical system is smaller than 0.67, and the zooming multiple of the optical system exceeds 30 times.
Further, at least three lenses in the fixed group A use ultra-low dispersion glass.
Furthermore, at least one lens in the variable magnification group B adopts an aspheric surface type; at least one lens in the fixed group C adopts an aspheric surface; at least one lens in the compensation group D adopts an aspheric surface; the aspheric surface equation expression is:
。
compared with the prior art, the application has the following beneficial effects: the short-focus horizontal field angle of the large-zoom-ratio microminiaturized airborne pod optical system is larger than 60 degrees, the long-focus horizontal field angle is smaller than 2 degrees, and the zoom multiple is more than 30 times; the ratio of the total length to the length Jiao Jiaoju of the optical system is smaller than 0.67, so that microminiaturization is realized.
The present application will be further described in detail below with reference to specific embodiments and associated drawings for the purpose of making the objects, technical solutions and advantages of the present application more apparent.
Drawings
FIG. 1 is a schematic view of a wide-angle end optical structure according to an embodiment of the present application;
FIG. 2 is a graph of axial chromatic aberration of an operating band at a wide-angle end according to an embodiment of the present application;
FIG. 3 is a vertical chromatic aberration diagram of an operating band at a wide-angle end according to an embodiment of the present application;
FIG. 4 is a diagram showing the distortion of the working wave Duan Changqu at the wide-angle end according to an embodiment of the present application;
FIG. 5 is an axial chromatic aberration diagram of an operating band at a telephoto end according to an embodiment of the present application;
FIG. 6 is a vertical axis chromatic aberration diagram of an operating band at a telephoto end according to an embodiment of the present application;
FIG. 7 is a diagram showing the distortion of the working wave Duan Changqu at the telescope end according to the embodiment of the present application;
FIG. 8 is a schematic view of a second wide-angle end optical structure according to an embodiment of the present application;
FIG. 9 is an axial chromatic aberration diagram of an operating band at the wide-angle end of a second embodiment of the present application;
FIG. 10 is a vertical chromatic aberration diagram of an operating band at the wide-angle end of a second embodiment of the present application;
FIG. 11 is a graph showing the distortion of the working wave Duan Changqu at the wide-angle end according to the second embodiment of the present application;
FIG. 12 is an axial chromatic aberration diagram of an operating band at a second telescope end according to the present application;
FIG. 13 is a vertical axis chromatic aberration diagram of a working band at a second telescope end according to the embodiment of the present application;
fig. 14 is a diagram showing the distortion of the working wave Duan Changqu at the second telescopic end according to the embodiment of the present application;
FIG. 15 is a schematic view of a three wide-angle end optical configuration according to an embodiment of the present application;
FIG. 16 is an axial chromatic aberration diagram of the operating band at the three wide-angle end of an embodiment of the present application;
FIG. 17 is a vertical chromatic aberration diagram of an operating band at the three wide angle end of an embodiment of the present application;
fig. 18 is a diagram showing the distortion of working wave Duan Changqu at the three-wide-angle end according to the embodiment of the present application;
FIG. 19 is an axial chromatic aberration diagram of an operating band at a triple telescope end according to an embodiment of the present application;
FIG. 20 is a vertical axis color difference chart of working wave bands of a three-telescope end according to the embodiment of the application;
fig. 21 is a diagram showing the distortion of the working wave Duan Changqu at the three-telescope end according to the embodiment of the present application.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Embodiment one: as shown in fig. 1-7, a large-zoom-ratio microminiaturized airborne pod optical system, wherein a lens with focal power of the optical system consists of a fixed group A with positive focal power, a variable group B with negative focal power, a fixed group C with positive focal power and a compensation group D with positive focal power, which are sequentially arranged along the incidence direction of light rays; the fixed group A consists of a negative focal power lens A1, a positive focal power lens A2, a positive focal power lens A3, a positive focal power lens A4 and a positive focal power lens A5 which are sequentially arranged along the incidence direction of light rays; the variable magnification group B consists of a negative focal power lens B1, a lens B2 and a lens B3 which are sequentially arranged along the incidence direction of light rays, wherein the lens B2 is of negative focal power, and the lens B3 is of positive focal power; the fixed group C comprises a positive focal power lens C1 and a lens C2 which are sequentially arranged along the incidence direction of light rays, and the lens C2 is a positive optical angle; the compensation group D consists of a lens D1, a lens D2, a lens D3, a lens D4 and a positive focal power lens D5 which are sequentially arranged along the incidence direction of light rays, and a piece of plate glass is arranged behind the lens D5; the lens D1 and the lens D2 are closely connected into a bonding group, the lens D3 and the lens D4 are closely connected into a bonding group, the lens D1 and the lens D3 are negative focal power, and the lens D2 and the lens D4 are positive focal power.
In this embodiment, the fixed group C includes a lens C3 located behind the lens C2.
In this embodiment, the lens A1 in the fixed group a is a biconcave negative lens, the lens A2 is a biconvex positive lens, the lens A3 is a biconvex positive lens, the lens A4 is a meniscus positive lens, and the lens A5 is a meniscus positive lens; the lens B1 in the zoom group B is a meniscus negative lens, the lens B2 is a biconcave negative lens, and the lens B3 is a biconvex positive lens; the lens C1 in the rear fixed group C is a meniscus positive lens, the lens C2 is a biconvex positive lens, and the lens C3 is a meniscus negative lens; the lens D1 in the compensation group D is a biconcave negative lens, the lens D2 is a biconvex positive lens, the lens D3 is a biconcave negative lens, the lens D4 is a biconvex positive lens, and the lens D5 is a biconvex positive lens.
In this embodiment, the ratio of the total length to the length Jiao Jiaoju of the optical system is less than 0.67, and the zoom factor of the optical system is more than 30 times.
In this embodiment, at least three lenses in the fixed group a use ultra-low dispersion glass.
In this embodiment, at least one lens in the variable magnification group B adopts an aspherical surface type; at least one lens in the fixed group C adopts an aspheric surface; at least one lens in the compensation group D adopts an aspheric surface type.
In the present embodiment, the lenses B1, C2, and D5 are aspherical lenses.
In order to achieve the above design parameters, the specific designs adopted for each lens in the optical system of this embodiment are shown in the following table:
the technical indexes of the optical system implementation of the embodiment are as follows:
(1) Horizontal angle of view: wide-angle end=60.6°, telephoto end=1.95°.
(2) The ratio of total length to length Jiao Jiaoju of the optical system=0.65.
The aspherical surface equation expression of the aspherical lens is:
。
the aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
embodiment two: as shown in fig. 8-14, a large-zoom-ratio microminiaturized airborne pod optical system, wherein a lens with optical power of the optical system consists of a fixed group A with positive optical power, a variable group B with negative optical power, a fixed group C with positive optical power and a compensation group D with positive optical power, which are sequentially arranged along the incidence direction of light rays; the fixed group A consists of a negative focal power lens A1, a positive focal power lens A2, a positive focal power lens A3, a positive focal power lens A4 and a positive focal power lens A5 which are sequentially arranged along the incidence direction of light rays, and the lens A1 and the lens A2 are closely connected into a gluing group; the variable magnification group B consists of a negative focal power lens B1, a lens B2 and a lens B3 which are sequentially arranged along the incidence direction of light rays, wherein the lens B2 is of negative focal power, and the lens B3 is of positive focal power; the fixed group C comprises a positive focal power lens C1 and a lens C2 which are sequentially arranged along the incidence direction of light rays, and the lens C2 is a positive optical angle; the compensation group D consists of a lens D1, a lens D2, a lens D3, a lens D4 and a positive focal power lens D5 which are sequentially arranged along the incidence direction of light rays, and a piece of plate glass is arranged behind the lens D5; the lens D1 and the lens D2 are closely connected into a bonding group, the lens D3 and the lens D4 are closely connected into a bonding group, the lens D1 and the lens D3 are negative focal power, and the lens D2 and the lens D4 are positive focal power.
In this embodiment, the fixed group C includes a lens C3 located behind the lens C2.
In this embodiment, the fixed group C further includes a lens C4 located behind the lens C3, where the lens C3 and the lens C4 are closely adhered to form a cemented group, and the lens C3 has negative optical power and the lens C4 has positive optical power.
In this embodiment, the lens A1 in the fixed group a is a biconcave negative lens, the lens A2 is a biconvex positive lens, the lens A3 is a biconvex positive lens, the lens A4 is a meniscus positive lens, and the lens A5 is a meniscus positive lens; the lens B1 in the zoom group B is a meniscus negative lens, the lens B2 is a biconcave negative lens, and the lens B3 is a biconvex positive lens; the lens C1 in the rear fixed group C is a meniscus positive lens, the lens C2 is a biconvex positive lens, the lens C3 is a biconcave negative lens, and the lens C4 is a meniscus positive lens; the lens D1 in the compensation group D is a meniscus negative lens, the lens D2 is a biconvex positive lens, the lens D3 is a biconcave negative lens, the lens D4 is a biconvex positive lens, and the lens D5 is a biconvex positive lens.
In this embodiment, the ratio of the total length to the length Jiao Jiaoju of the optical system is less than 0.67, and the zoom factor of the optical system is more than 30 times.
In this embodiment, at least three lenses in the fixed group a use ultra-low dispersion glass.
In this embodiment, at least one lens in the variable magnification group B adopts an aspherical surface type; at least one lens in the fixed group C adopts an aspheric surface; at least one lens in the compensation group D adopts an aspheric surface type.
In the present embodiment, the lenses B1, C2, and D5 are aspherical lenses.
In order to achieve the above design parameters, the specific designs adopted for each lens in the optical system of this embodiment are shown in the following table:
the technical indexes of the optical system implementation of the embodiment are as follows:
(1) Horizontal angle of view: wide-angle end=60.3°, telephoto end=1.92°.
(2) The ratio of total length to length Jiao Jiaoju of the optical system = 0.66.
The aspherical surface equation expression of the aspherical lens is:
。
the aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
embodiment III: 15-21, a large-zoom-ratio microminiaturized airborne pod optical system is provided, wherein a lens with focal power of the optical system consists of a fixed group A with positive focal power, a variable group B with negative focal power, a fixed group C with positive focal power, a compensating group D with positive focal power and a fixed group E with negative focal power, which are sequentially arranged along the incidence direction of light rays; the fixed group A consists of a negative focal power lens A1, a positive focal power lens A2, a positive focal power lens A3, a positive focal power lens A4 and a positive focal power lens A5 which are sequentially arranged along the incidence direction of light rays, and the lens A1 and the lens A2 are closely connected into a gluing group; the variable magnification group B consists of a negative focal power lens B1, a lens B2 and a lens B3 which are sequentially arranged along the incidence direction of light rays, wherein the lens B2 is of negative focal power, the lens B3 is of positive focal power, and the lens B2 and the lens B3 are closely connected to form a gluing group; the fixed group C comprises a positive focal power lens C1 and a lens C2 which are sequentially arranged along the incidence direction of light rays, and the lens C2 is a positive optical angle; the compensation group D consists of a lens D1, a lens D2, a lens D3, a lens D4 and a positive focal power lens D5 which are sequentially arranged along the incidence direction of light rays, and a piece of plate glass is arranged behind the lens D5; the lens D1 and the lens D2 are closely connected to form a bonding group, the lens D3 and the lens D4 are closely connected to form a bonding group, the lens D1 and the lens D3 are of negative focal power, and the lens D2 and the lens D4 are of positive focal power; the fixed group E adopts a negative focal power lens E1.
In this embodiment, the lens A1 in the fixed group a is a biconcave negative lens, the lens A2 is a biconvex positive lens, the lens A3 is a biconvex positive lens, the lens A4 is a meniscus positive lens, and the lens A5 is a meniscus positive lens; the lens B1 in the zoom group B is a meniscus negative lens, the lens B2 is a biconcave negative lens, and the lens B3 is a biconvex positive lens; the lens C1 in the rear fixed group C is a biconvex positive lens, and the lens C2 is a meniscus negative lens; the lens D1 in the compensation group D is a biconcave negative lens, the lens D2 is a biconvex positive lens, the lens D3 is a biconvex positive lens, the lens D4 is a meniscus negative lens, and the lens D5 is a meniscus positive lens.
In this embodiment, the ratio of the total length to the length Jiao Jiaoju of the optical system is less than 0.67, and the zoom factor of the optical system is more than 30 times.
In this embodiment, at least three lenses in the fixed group a use ultra-low dispersion glass.
In this embodiment, at least one lens in the variable magnification group B adopts an aspherical surface type; at least one lens in the fixed group C adopts an aspheric surface; at least one lens in the compensation group D adopts an aspheric surface type.
In the present embodiment, the lenses B1, C1, and D5 are aspherical lenses.
In order to achieve the above design parameters, the specific designs adopted for each lens in the optical system of this embodiment are shown in the following table:
the technical indexes of the optical system implementation of the embodiment are as follows:
(1) Horizontal angle of view: wide-angle end=60.7°, telephoto end=1.97°.
(2) The ratio of total length to length Jiao Jiaoju of the optical system = 0.67.
The aspherical surface equation expression of the aspherical lens is:
。
the aspherical coefficients of the respective aspherical lenses of the optical system of the present embodiment are as follows:
any of the above-described embodiments of the present application disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the application, and the numerical values listed above should not limit the protection scope of the application.
If the application discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the application can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
The above description is only a preferred embodiment of the present application, and is not intended to limit the application in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present application still fall within the protection scope of the technical solution of the present application.
Claims (5)
1. A high-zoom-ratio microminiaturized airborne nacelle optical system is characterized in that: the lens with the optical power of the optical system consists of a positive optical power fixed group A, a negative optical power variable group B, a positive optical power fixed group C and a positive optical power compensating group D which are sequentially arranged along the incidence direction of light rays, or consists of a positive optical power fixed group A, a negative optical power variable group B, a positive optical power fixed group C, a positive optical power compensating group D and a negative optical power fixed group E which are sequentially arranged along the incidence direction of light rays; the fixed group A consists of a negative focal power lens A1, a positive focal power lens A2, a positive focal power lens A3, a positive focal power lens A4 and a positive focal power lens A5 which are sequentially arranged along the incidence direction of light rays; the variable magnification group B consists of a negative focal power lens B1, a lens B2 and a lens B3 which are sequentially arranged along the incidence direction of light rays; the fixed group C comprises a positive focal power lens C1 and a lens C2 which are sequentially arranged along the incidence direction of light rays; the compensation group D consists of a lens D1, a lens D2, a lens D3, a lens D4 and a positive focal power lens D5 which are sequentially arranged along the incidence direction of light rays; the fixed group E adopts a negative focal power lens E1; the short-focus horizontal field angle of the optical system is larger than 60 degrees, the long-focus horizontal field angle is smaller than 2 degrees, and the zoom multiple is more than 30 times; the ratio of the total length to the length Jiao Jiaoju of the optical system is less than 0.67.
2. The high-zoom-ratio microminiaturized airborne pod optical system of claim 1, wherein: the fixed group C includes a lens C3 located behind the lens C2.
3. The high-zoom-ratio microminiaturized airborne pod optical system of claim 2, wherein: the fixed group C includes a lens C4 located behind the lens C3.
4. The high-zoom-ratio microminiaturized airborne pod optical system of claim 1, wherein: at least three lenses in the fixed group A use ultra-low dispersion glass.
5. The high-zoom-ratio microminiaturized airborne pod optical system of claim 1, wherein: at least one lens in the zoom group B adopts an aspheric surface; at least one lens in the fixed group C adopts an aspheric surface; at least one lens in the compensation group D adopts an aspheric surface; the aspheric surface equation expression is:
。
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| CN202111627104.1A CN114355591B (en) | 2021-12-29 | 2021-12-29 | Large-zoom-ratio microminiaturized airborne nacelle optical system |
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| CN202111627104.1A CN114355591B (en) | 2021-12-29 | 2021-12-29 | Large-zoom-ratio microminiaturized airborne nacelle optical system |
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| CN214751079U (en) * | 2021-06-10 | 2021-11-16 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
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| JP2005284063A (en) * | 2004-03-30 | 2005-10-13 | Fujinon Corp | Four-group zoom lens with vibration-proof function |
| JP2014010324A (en) * | 2012-06-29 | 2014-01-20 | Sony Corp | Zoom lens and imaging apparatus |
| JP2018194730A (en) * | 2017-05-19 | 2018-12-06 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| CN110709748A (en) * | 2017-06-08 | 2020-01-17 | 柯尼卡美能达株式会社 | Zoom lens and imaging device |
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