CN115268043B - Single-component strong-light-pickup double-view-field switching optical system and imaging method thereof - Google Patents
Single-component strong-light-pickup double-view-field switching optical system and imaging method thereof Download PDFInfo
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- CN115268043B CN115268043B CN202210839485.8A CN202210839485A CN115268043B CN 115268043 B CN115268043 B CN 115268043B CN 202210839485 A CN202210839485 A CN 202210839485A CN 115268043 B CN115268043 B CN 115268043B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1455—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative
- G02B15/145513—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative arranged --++-
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
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Abstract
The invention relates to a single-component strong-light-pickup double-view-field switching optical system, which comprises a fixed group A, a switching group B, a fixed group C and an imaging target surface, wherein the fixed group A, the switching group B, the fixed group C and the imaging target surface are sequentially arranged from left to right along the light incidence direction, and the fixed group A comprises a biconvex positive lens A-1, a biconvex positive lens A-2 and a biconcave negative lens A-3; the switching group B comprises a crescent-shaped negative lens B-1, a crescent-shaped positive lens B-2 and a biconcave-shaped negative lens B-3; the fixed group C comprises a biconvex positive lens C-1, a crescent negative lens C-2, a crescent positive lens C-3, a biconvex positive lens C-4, a biconcave negative lens C-5, a biconcave negative lens C-6, a crescent positive lens C-7, a biconcave negative lens C-8 and a biconvex negative lens C-9. The invention has simple structure and reasonable design, the optical system can realize the quick switching of the large and small view fields through the axial position change of the switching group B, namely, the quick searching of the large view field and the high-resolution identification of the small view field are realized at the same time, and the optical system has large relative aperture and strong light-shooting capability.
Description
Technical Field
The invention relates to a single-component strong-light double-view-field switching optical system and an imaging method thereof.
Background
Along with the continuous development of the optical industry, optical imaging tracking is widely applied to a plurality of fields such as military industry, security protection, aerospace and the like, and meanwhile, the optical imaging tracking is developing towards the requirements of light weight, miniaturization, high resolution and the like. For a fast moving target, the dual-view imaging tracking system has the functions of short-focus large-view searching and long-focus high-resolution identification measurement, so that the dual-view imaging tracking system has a wide application prospect.
The existing zoom mode of the dual-view imaging tracking optical system mainly comprises an independent zoom mode, a cut-in zoom mode, an axial zoom mode and the like. The independent zooming mode adopts two detectors to independently design a large-view-field optical system and a small-view-field optical system respectively, so that the cost is high and the miniaturization is not facilitated; the cut-in zooming mode realizes double-view-field imaging by radial cut-in zooming components, the radial size of the system is large, and the optical axes of the two view fields are poor in consistency; the axial zooming mode realizes double-view field imaging by utilizing the principle of object-image exchange and the relative axial movement between the zoom component and the compensation component, and has the advantages of compact structure, high integration level and the like.
Disclosure of Invention
The invention improves the problems, namely the technical problem to be solved by the invention is to provide a single-component strong-light-pickup double-view-field switching optical system and an imaging method thereof, and the double-view-field fast switching is realized only by axial movement of the single component on the basis of an axial zooming mode, so that the optical system has compact volume, larger relative aperture and strong light-pickup characteristic.
The invention is formed by comprising a fixed group A, a switching group B, a fixed group C and an imaging target surface which are sequentially arranged from left to right along the light incidence direction, wherein the fixed group A comprises a biconvex positive lens A-1, a biconvex positive lens A-2 and a biconcave negative lens A-3; the switching group B comprises a crescent-shaped negative lens B-1, a crescent-shaped positive lens B-2 and a biconcave-shaped negative lens B-3; the fixed group C comprises a biconvex positive lens C-1, a crescent negative lens C-2, a crescent positive lens C-3, a biconvex positive lens C-4, a biconcave negative lens C-5, a biconcave negative lens C-6, a crescent positive lens C-7, a biconcave negative lens C-8 and a biconvex negative lens C-9.
Further, the positive lens A-2 and the negative lens A-3 are closely connected to form a first gluing group U1, the negative lens B-1 and the positive lens B-2 are closely connected to form a second gluing group U2, the negative lens C-2 and the positive lens C-3 are closely connected to form a third gluing group U3, the positive lens C-4 and the negative lens C-5 are closely connected to form a fourth gluing group U4, and the negative lens C-6 and the positive lens C-7 are closely connected to form a fifth gluing group U5.
Furthermore, the resolution of the imaging target surface is 800 multiplied by 800, the pixel size is 4.5 mu m, and the response is 0.6-0.9 mu m.
Further, the first glue group has a negative optical power phi U1 The second bonding group has negative focal power phi U2 The third gluing group has positive optical power phi U3 The fourth gluing group has positive optical power phi U4 The fifth gluing group has negative focal power phi U5 And satisfies the following relationship:
0.01＜｜φ U1 /φ S ｜＜0.05，0.05＜｜φ U1 /φ L ｜＜0.1；
0.1＜｜φ U2 /φ S ｜＜0.4，0.6＜｜φ U2 /φ L ｜＜1；
0.2＜｜φ U3 /φ S ｜＜0.5，0.8＜｜φ U3 /φ L ｜＜1.1；
0.1＜｜φ U4 /φ S ｜＜0.3，0.3＜｜φ U4 /φ L ｜＜0.6；
0.08＜｜φ U5 /φ S ｜＜0.25，0.45＜｜φ U5 /φ L ｜＜0.65；
wherein phi is S Optical power phi of large-view-field integral optical path L The focal power of the whole light path of the small view field.
Further, the optical system has a strong light-pickup capacity relative to the aperture of 1/1.8.
Further, the imaging method of the single-component strong-light-pickup double-view-field switching optical system is characterized in that light rays sequentially pass through the positive lens A-1, the positive lens A-2, the negative lens A-3, the negative lens B-1, the positive lens B-2, the negative lens B-3, the positive lens C-1, the negative lens C-2, the positive lens C-3, the positive lens C-4, the negative lens C-5, the negative lens C-6, the positive lens C-7, the negative lens C-8 and the negative lens C-9 from left to right and then are imaged.
Compared with the prior art, the invention has the following beneficial effects: the device has the advantages of simple structure, reasonable design, short moving distance, contribution to the quick switching of double view fields, small assembling and adjusting difficulty, easy guarantee of the consistency of the optical axes of the large view field and the small view field, compact structure, strong light-taking capability, and capability of realizing quick search of the large view field and high-resolution identification of the small view field.
Drawings
FIG. 1 is a diagram of an optical system according to an embodiment of the present invention;
FIG. 2 is a point column diagram of a large field of view according to an embodiment of the present invention;
FIG. 3 is a graph of MTF over a large field of view in accordance with an embodiment of the present invention;
FIG. 4 is a plot of the point of view at a small field of view according to an embodiment of the present invention;
fig. 5 is a graph of MTF at a small field of view in an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Example 1: referring to fig. 1-5, in this embodiment, a single-component strong-light double-view-field switching optical system is provided, which includes a fixed group a, a switching group B, a fixed group C, and an imaging target surface sequentially disposed from left to right along a light incident direction, where the fixed group a includes a biconvex positive lens a-1, a biconvex positive lens a-2, and a biconcave negative lens a-3; the switching group B comprises a crescent-shaped negative lens B-1, a crescent-shaped positive lens B-2 and a biconcave-shaped negative lens B-3; the fixed group C comprises a biconvex positive lens C-1, a crescent negative lens C-2, a crescent positive lens C-3, a biconvex positive lens C-4, a biconcave negative lens C-5, a biconcave negative lens C-6, a crescent positive lens C-7, a biconcave negative lens C-8 and a biconvex negative lens C-9.
In the present embodiment, the biconvex positive lens A-2 and the biconcave negative lens A-3 are closely connected to form a first gluing group U1, the crescent negative lens B-1 and the crescent positive lens B-2 are closely connected to form a second gluing group U2, the crescent negative lens C-2 and the crescent positive lens C-3 are closely connected to form a third gluing group U3, the biconvex positive lens C-4 and the biconcave negative lens C-5 are closely connected to form a fourth gluing group U4, and the biconcave negative lens C-6 and the crescent positive lens C-7 are closely connected to form a fifth gluing group U5.
In this embodiment, the resolution of the imaging target surface is 800×800, the pixel size is 4.5 μm, and the response is 0.6-0.9 μm.
In this embodiment, the switching group B is a movable component, and when the center interval between the switching group B and the fixed group a is 7.0mm, the optical system has a large field of view; the optical system has a small field of view when the switching group B is spaced 68.4mm from the center of the fixed group a. The dual-view fast switching can be achieved by axially moving the position of the switching group B.
In this embodiment, the first glue group has a negative optical power phi U1 The second bonding group has negative focal power phi U2 The third gluing group has positive optical power phi U3 The fourth gluing group has positive optical power phi U4 The fifth gluing group has negative focal power phi U5 And satisfies the following relationship:
0.01＜｜φ U1 /φ S ｜＜0.05，0.05＜｜φ U1 /φ L ｜＜0.1；
0.1＜｜φ U2 /φ S ｜＜0.4，0.6＜｜φ U2 /φ L ｜＜1；
0.2＜｜φ U3 /φ S ｜＜0.5，0.8＜｜φ U3 /φ L ｜＜1.1；
0.1＜｜φ U4 /φ S ｜＜0.3，0.3＜｜φ U4 /φ L ｜＜0.6；
0.08＜｜φ U5 /φ S ｜＜0.25，0.45＜｜φ U5 /φ L ｜＜0.65；
wherein phi is S Optical power phi of large-view-field integral optical path L The focal power of the whole light path of the small view field.
In this embodiment, the optical system has a strong light-capturing power with respect to an aperture of 1/1.8.
In this embodiment, at the time of imaging: the light rays sequentially pass through the positive lens A-1, the positive lens A-2, the negative lens A-3, the negative lens B-1, the positive lens B-2, the negative lens B-3, the positive lens C-1, the negative lens C-2, the positive lens C-3, the positive lens C-4, the negative lens C-5, the negative lens C-6, the positive lens C-7, the negative lens C-8 and the negative lens C-9 from left to right for imaging.
Example 2: in this embodiment, the single-component strong-light double-field switching optical system has each lens satisfying the parameter requirements shown in table 1, wherein R is the radius of curvature of the lens surface, and the unit is mm; d is the thickness of the lenses and the air interval between the lenses, and the unit is mm; n is the refractive index of the material; v is the Abbe number of the material; the surface numbers are sequentially arranged along the order from left to right as shown in fig. 1:
TABLE 1
The axial moving distance of the switching group B in the single-component strong-light-pickup double-view-field switching optical system is 61.4mm, and the switching group B is driven by a motor to move to a corresponding position so as to realize the rapid switching of double view fields. Fig. 2 and 3 show the dot pattern and MTF curve of the optical system in a large field of view, and fig. 4 and 5 show the dot pattern and MTF curve of the optical system in a small field of view. The MTF curve shows that the MTF curve of the optical system with the large field of view is not smaller than 0.5 at the frequency of 111lp/mm, and the system has the capability of simultaneously realizing the rapid search of the large field of view and the high-resolution identification imaging of the small field of view.
Any of the above-described embodiments of the present invention 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 invention, and the numerical values listed above should not limit the protection scope of the invention.
Meanwhile, if the above invention discloses or relates to parts or structural members fixedly connected with each other, the fixed connection may be understood as follows unless otherwise stated: 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).
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is used merely to facilitate distinguishing between components and not otherwise stated, and does not have a special meaning.
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 invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (4)
1. The single-component strong-light-pickup double-view-field switching optical system is characterized by comprising a fixed group A, a switching group B, a fixed group C and an imaging target surface which are sequentially arranged from left to right along the light incidence direction, wherein the fixed group A comprises a biconvex positive lens A-1, a biconvex positive lens A-2 and a biconcave negative lens A-3; the switching group B consists of a crescent-shaped negative lens B-1, a crescent-shaped positive lens B-2 and a biconcave-shaped negative lens B-3; the fixed group C consists of a biconvex positive lens C-1, a crescent negative lens C-2, a crescent positive lens C-3, a biconvex positive lens C-4, a biconcave negative lens C-5, a biconcave negative lens C-6, a crescent positive lens C-7, a biconcave negative lens C-8 and a biconvex negative lens C-9;
the positive lens A-2 and the negative lens A-3 are closely connected to form a first gluing group U1, the negative lens B-1 and the positive lens B-2 are closely connected to form a second gluing group U2, the negative lens C-2 and the positive lens C-3 are closely connected to form a third gluing group U3, the positive lens C-4 and the negative lens C-5 are closely connected to form a fourth gluing group U4, and the negative lens C-6 and the positive lens C-7 are closely connected to form a fifth gluing group U5;
the first bonding group has negative focal power phi U1 The second bonding group has negative focal power phi U2 The third gluing group has positive optical power phi U3 The fourth gluing group has positive optical power phi U4 The fifth gluing group has negative focal power phi U5 And satisfies the following relationship:
0.01＜｜φ U1 /φ S ｜＜0.05，0.05＜｜φ U1 /φ L ｜＜0.1；
0.1＜｜φ U2 /φ S ｜＜0.4，0.6＜｜φ U2 /φ L ｜＜1；
0.2＜｜φ U3 /φ S ｜＜0.5，0.8＜｜φ U3 /φ L ｜＜1.1；
0.1＜｜φ U4 /φ S ｜＜0.3，0.3＜｜φ U4 /φ L ｜＜0.6；
0.08＜｜φ U5 /φ S ｜＜0.25，0.45＜｜φ U5 /φ L ｜＜0.65；
wherein phi is S Optical power phi of large-view-field integral optical path L The focal power of the whole light path of the small view field.
2. The single-component high-intensity dual-field switching optical system according to claim 1, wherein the resolution of the imaging target surface is 800×800, the pixel size is 4.5 μm, and the response is 0.6-0.9 μm.
3. The single-element high-intensity dual-field switching optical system of claim 1, wherein said optical system has a high-intensity optical power with respect to an aperture of 1/1.8.
4. An imaging method of the single-unit strong-light double-view-field switching optical system according to any one of claims 1 to 3, wherein light rays sequentially pass through a positive lens A-1, a positive lens A-2, a negative lens A-3, a negative lens B-1, a positive lens B-2, a negative lens B-3, a positive lens C-1, a negative lens C-2, a positive lens C-3, a positive lens C-4, a negative lens C-5, a negative lens C-6, a positive lens C-7, a negative lens C-8 and a negative lens C-9 from left to right and then are imaged.
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| JP2003029147A (en) * | 2001-07-12 | 2003-01-29 | Kyocera Corp | Zoom lens for projection |
| JP2005172938A (en) * | 2003-12-08 | 2005-06-30 | Fujinon Corp | Vibration isolating zoom lens |
| WO2016104742A1 (en) * | 2014-12-26 | 2016-06-30 | 株式会社ニコン | Variable magnification optical system, optical device, and method for producing variable magnification optical system |
| CN209198755U (en) * | 2018-11-06 | 2019-08-02 | 中国科学院西安光学精密机械研究所 | A kind of short-wave infrared continuous magnification lens |
| CN110389431B (en) * | 2019-07-10 | 2021-08-10 | 福建福光股份有限公司 | Large-relative-aperture 4K all-in-one optical zoom lens |
| CN110262023B (en) * | 2019-07-17 | 2022-03-22 | 成都优视光电技术有限公司 | Quadruple continuous zooming 4K high-definition optical system |
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