CN110007439B - Telecentric optical system of digital aviation mapping panchromatic camera - Google Patents
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- 230000003287 optical effect Effects 0.000 title claims abstract description 111
- 238000013507 mapping Methods 0.000 title abstract description 20
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- 229910052746 lanthanum Inorganic materials 0.000 claims description 10
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 10
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/02—Picture taking arrangements specially adapted for photogrammetry or photographic surveying, e.g. controlling overlapping of pictures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/04—Reversed telephoto objectives
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The application discloses a telecentric optical system of a digital aviation mapping panchromatic camera, which comprises the following components: a front lens group, a middle lens group and a rear lens group which are sequentially arranged from left to right along the incidence direction of light rays; the front lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged; the middle lens group comprises a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged; the rear lens includes an eleventh lens; the application adopts the combined light path type of the inverse distance with positive focal power and telecentricity of the image space, the imaging view field reaches 70 degrees, the average MTF of the whole view field is more than or equal to 0.65@55lp/mm, the distortion of the whole view field is less than or equal to 0.02%, and the illuminance uniformity reaches more than 75.8%. The optical system has the advantages of compact structure, good illumination uniformity, good imaging quality and light and small size, and simultaneously greatly reduces the processing and manufacturing cost of the optical system.
Description
Technical Field
The application relates to the technical field of imaging optics, in particular to a telecentric optical system of a digital aviation mapping panchromatic camera.
Background
The aerial surveying and mapping camera is carried on an airborne platform, can remotely image ground objects, provides high-resolution and low-distortion remote sensing image information, and has wide application in the fields of agriculture and forestry, emergency disaster reduction, urban planning construction and the like. Particularly, in recent years, with the proposal of concepts such as smart cities and digital cities and the promotion of rapid development of digital cities, an aviation mapping camera can provide high-definition mapping images of large area arrays, provide high-resolution image information with accurate positions, and play an important role in various aspects such as emergency response, urban security, urban functions, spatial layout, water conservancy pipeline construction and the like.
Traditional aerial survey and drawing cameras use films to achieve wide-area remote sensing image acquisition. With the development and continuous maturation of the technology of large-area array CCD or CMOS photosensitive devices, digital aviation mapping cameras based on CCD or CMOS devices have the advantages of higher resolution, repeated use, capability of providing video images and the like, and gradually replace the glue film type aviation mapping cameras. Because of the smaller pixel size of the CCD or CMOS device, the imaging field of view is larger and the requirements on the camera optics are higher.
According to practical application requirements, the digital aviation mapping camera optical systems are mainly divided into two types, namely a color camera optical system for collecting spectrum information of the ground, imaging is carried out based on a color CCD or CMOS device, and spectrum information data of the ground are obtained; the imaging lens has the characteristics of medium focal length, large relative aperture, high resolution, wide-angle imaging view field and the like; the other type is a full-color camera optical system capable of collecting high-resolution geometric information on the ground and capable of precisely measuring the ground features. The camera performs imaging based on a full-color high-performance CCD or CMOS device, and the optical system of the camera has the characteristics of longer focal length, larger relative aperture, higher resolution, wide-angle imaging field of view and the like. The digital aerial surveying and mapping color camera is combined with the digital aerial surveying and mapping panchromatic camera, so that fusion of image information is realized, and high-resolution color remote sensing image information can be obtained.
The optical system is the core in digital aerial survey panchromatic cameras, requiring large field of view high resolution and low distortion imaging. Because of being applied to aviation flight platforms, the light and small-sized requirements are also demanding. The design and application of the high-performance digital aviation mapping camera optical system are important research objects for developing aviation mapping camera technology at home and abroad. Its main technical trends are large field imaging, high resolution, low distortion and light camera miniaturization. Because the optical system of the aerial surveying and mapping camera needs to realize large-view-field imaging, a symmetrical optical system structure type is generally adopted to realize both high image quality and low distortion. In such designs, the illuminance distribution of the image plane is approximately proportional to the cosine of the field angle to the fourth power, and the illuminance of the image plane drops sharply with increasing field of view, resulting in poor illuminance uniformity across the image plane. The obtained image darkens rapidly when deviating from the center of the field of view, and the actual brightness distribution of the ground object cannot be reflected objectively.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a telecentric optical system of a digital aviation mapping panchromatic camera, which can greatly improve the illuminance uniformity of an image plane and obtain a ground object image with better effect on the premise of ensuring the requirements of large view field, high resolution and low distortion imaging performance.
The application solves the technical problems as follows: a digital aerial survey panchromatic camera telecentric optical system comprising: a front lens group, a middle lens group and a rear lens group which are sequentially arranged from left to right along the incidence direction of light rays;
the front lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged; the middle lens group comprises a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged; the rear lens includes an eleventh lens;
the first lens and the sixth lens are meniscus lenses with positive focal power, the second lens, the third lens, the fourth lens and the tenth lens are meniscus lenses with negative focal power, the fifth lens, the eighth lens, the ninth lens and the eleventh lens are biconvex lenses with positive focal power, and the seventh lens is biconcave lens with negative focal power.
As a further improvement of the above technical solution, the first lens and the second lens form a double cemented lens.
As a further improvement of the above technical solution, the sixth lens, the seventh lens and the eighth lens form a triple cemented lens.
As a further improvement of the above technical solution, the angular magnification reciprocal of the chief ray of the field of view outside the axis of the front lens group is 1/γ, where 1/γ satisfies:
1.25≤1/γ≤1.45。
as a further improvement of the above technical solution, the focal power of the front lens groupOptical power of optical system->The ratio of (2) is as follows:
the focal power of the middle lens groupOptical power of optical system->The ratio of (2) is as follows:
the focal power of the rear lens groupOptical power of optical system->The ratio of (2) is as follows:
wherein the method comprises the steps ofIs the focal power of the front lens group, +.>Is the optical power of the middle lens group, +.>Is the optical power of the rear lens group, +.>Is the optical power of the optical system.
As a further improvement of the above technical solution, the fifth lens and the sixth lens are thick lenses.
As a further improvement of the above technical solution, an optical surface of the fifth lens close to the aperture is a first optical surface, an optical surface of the sixth lens close to the aperture is a second optical surface, a height of an on-axis field edge ray of the optical system on the first optical surface is h1, and a height of an on-axis field edge ray of the optical system on the second optical surface is h1, where h1 and h2 satisfy:
0.96≤|h1/h2|≤1.08。
as a further improvement of the above technical solution, the height of the off-axis field chief ray of the optical system on the first optical surface is hz1, and the height of the off-axis field chief ray of the optical system on the second optical surface is hz2, where hz1 and hz2 satisfy:
1.5≤|hz1/hz2|≤2.0。
as a further improvement of the technical scheme, the first lens, the third lens and the fourth lens are made of lanthanum flint glass, the second lens is made of lanthanum flint glass, the fifth lens is made of crown glass, the sixth lens is made of lanthanum crown glass, the seventh lens is made of crown glass, the eighth lens is made of corona glass, the ninth lens is made of crown glass, the tenth lens is made of crown glass, and the eleventh lens is made of flint glass.
As a further improvement of the above technical solution, the diaphragm is an aperture diaphragm.
The beneficial effects of the application are as follows: the application adopts the combined light path type of the inverse distance with positive focal power and telecentricity of the image space, the imaging view field reaches 70 degrees, the average MTF of the whole view field is more than or equal to 0.65@55lp/mm, the distortion of the whole view field is less than or equal to 0.02%, and the illuminance uniformity reaches more than 75.8%. The optical system has the advantages of compact structure, good illumination uniformity, good imaging quality and light and small size, and simultaneously greatly reduces the processing and manufacturing cost of the optical system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the application, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of the composition of an optical system according to the present application;
FIG. 2 is a graph of the optical transfer function of the optical system of the present application at 55 lp/mm;
FIG. 3 is a distortion chart of an optical system of the present application;
FIG. 4 is a graph of the vertical aberration of an optical system according to the present application;
FIG. 5 is a graph of illuminance for a prior art optical system;
FIG. 6 is a graph of illuminance of an optical system according to the present application.
Detailed Description
The conception, specific structure, and technical effects produced by the present application will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present application. It is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present application based on the embodiments of the present application. In addition, all connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to a connection structure that may be better formed by adding or subtracting connection aids depending on the particular implementation. The technical features in the application can be interactively combined on the premise of no contradiction and conflict.
Embodiment 1, referring to fig. 1, a digital aerial mapping panchromatic camera telecentric optical system comprises: a front lens group, a middle lens group and a rear lens group which are sequentially arranged from left to right along the incidence direction of light rays;
the front lens group includes a first lens 100, a second lens 200, a third lens 300, and a fourth lens 400, which are sequentially disposed; the middle lens group includes a fifth lens 500, a stop 130, a sixth lens 600, a seventh lens 700, an eighth lens 800, a ninth lens 900, and a tenth lens 110, which are sequentially disposed; the rear lens includes an eleventh lens 120;
the first lens 100 and the sixth lens 600 are meniscus lenses with positive focal power, the second lens 200, the third lens 300, the fourth lens 400 and the tenth lens 110 are meniscus lenses with negative focal power, the fifth lens 500, the eighth lens 800, the ninth lens 900 and the eleventh lens 120 are biconvex lenses with positive focal power, and the seventh lens 700 is biconcave lens with negative focal power.
As an optimization, the diaphragm 130 is an aperture diaphragm.
As an optimization, the first lens 100 and the second lens 200 form a double cemented lens.
As an optimization, the sixth lens 600, the seventh lens 700 and the eighth lens 800 constitute a triple cemented lens.
Preferably, the fifth lens 500 and the sixth lens 600 are thick lenses.
The fifth lens 500 is a drum-type biconvex positive power thick lens, and the sixth lens 600 is a meniscus positive power thick lens.
As an optimization, in order to reduce distortion higher order aberrations of the front lens group, and to reduce the pressure of the middle and rear lens group aberration correction, the combination is made. The inverse angle amplification rate of the front lens group on the chief ray of the out-of-axis view field is 1/gamma, wherein 1/gamma satisfies:
1.25≤1/γ≤1.45。
as an optimization, the focal power of the front lens groupOptical power of optical system->The ratio of (2) is as follows:
the focal power of the middle lens groupOptical power of optical system->The ratio of (2) is as follows:
the focal power of the rear lens groupOptical power of optical system->The ratio of (2) is as follows:
wherein the method comprises the steps ofIs the focal power of the front lens group, +.>Is of a middle lens groupOptical power (F)>Is the optical power of the rear lens group, +.>Is the optical power of the optical system.
As an optimization, the optical surface of the fifth lens 500 near the diaphragm 130 is a first optical surface, the optical surface of the sixth lens 600 near the diaphragm 130 is a second optical surface, the height of the on-axis view field edge ray of the optical system on the first optical surface is h1, and the height of the on-axis view field edge ray of the optical system on the second optical surface is h1, wherein h1 and h2 satisfy:
0.96≤|h1/h2|≤1.08。
as an optimization, the height of the off-axis field chief ray of the optical system on the first optical surface is hz1, and the height of the off-axis field chief ray of the optical system on the second optical surface is hz2, wherein hz1 and hz2 satisfy:
1.5≤|hz1/hz2|≤2.0。
the on-axis field of view edge ray refers to the edge ray of the zero field of view, i.e., the outermost one of the beams of the zero field of view.
The off-axis field chief ray refers to the chief ray corresponding to a field of view outside of the zero field of view.
The concave surface of the sixth lens 600 faces the diaphragm 130, the fifth lens 500 is positioned at one side of the diaphragm 130, and the high-order positive astigmatism generated by the fifth lens 500 and the high-order negative astigmatism generated by the concave surface of the sixth lens 600 are compensated.
In the embodiment of the application, the imaging view field reaches 70 degrees, and the astigmatism, field curvature, vertical chromatic aberration, distortion and other vertical chromatic aberration related to the view field are difficult to control, and particularly the distortion is strictly controlled by an optical system of an aeronautical surveying and mapping camera and is in direct proportion to the third power of the view field.
In addition to the need to reduce and control various higher aberrations over a large field of view, a major challenge with this design is to improve the uniformity of the image plane illumination. According to the optical design theory, in the non-telecentric symmetrical light path, the relationship between the uniformity distribution of the illuminance of the image plane and the angle of view is:
Eima＝E0*cos 4 U；
wherein Eima is the image plane illumination value, E0 is the image plane illumination of the central view field, and U is the included angle between the main ray of the off-axis view field and the optical axis.
When the half angle of the field reaches 35 deg., the illuminance of the edge field is only 45.0% of the center field.
In order to obtain the image quality with good illumination uniformity and better imaging performance, the application realizes the design of a near telecentric light path on the premise of large-view-field imaging. The relationship between the uniformity of the image plane illumination and the field angle is between the cosine first power and the second power of the field angle under the near telecentric light path:
Eima∝E0*cosU～E0*cos 2 U；
wherein Eima is the image plane illumination value, E0 is the image plane illumination of the central view field, and U is the included angle between the main ray of the off-axis view field and the optical axis.
The image space telecentric light path design can greatly improve the illumination uniformity of an image plane, solve the problem of poor illumination uniformity under a large view field, and exacerbate the correction difficulty of various view field aberrations due to the asymmetric optical system caused by the telecentric light path.
Based on the above consideration, the design selects the light path structure in front of the front lens group positive lens with better symmetry in the inverse long-distance light path structure. The main measures include:
1) The front lens group and the rear lens group are designed in an asymmetric mode, the front lens group adopts a structural mode that the focal power is positive, negative and negative, the value of the front lens group on the principal ray angle amplification rate is controlled not to be too small, and distortion high-grade aberration generated by the front lens group is reduced;
2) The drum-shaped biconvex positive focal power thick lens and the meniscus-shaped positive focal power thick lens are respectively adopted at two sides of the diaphragm 130, so that the height of the main ray of the off-axis view field can be effectively reduced; the height ratio of the on-axis view field marginal ray and the off-axis view field chief ray on the two optical surfaces on the two sides of the diaphragm 130 is controlled respectively, which is favorable for correcting the high-level astigmatism and the off-axis view field high-level spherical aberration and shortening the length of the optical system;
3) In order to correct axial chromatic aberration and vertical chromatic aberration generated by asymmetric changes, three cemented lenses are adopted, two chromatic aberration aberrations are effectively restrained by using two cemented surfaces, and one lens adopts a meniscus thick lens type, so that the effect of compensating field curvature aberration can be provided;
because the distortion correction difficulty is high, the distortion is related to astigmatism and field curvature, the optical system reduces the field curvature of the system through reasonable distribution of optical power, and the astigmatic aberration is restrained by arranging a drum-shaped biconvex thick lens, a meniscus-shaped thick lens, high-grade astigmatism on two sides of the diaphragm 130 and the like, and the distortion of the optical system is well controlled through the method.
The digital aviation mapping color camera telecentric optical system comprises the following specific parameters:
a focal length 69.93mm; the relative aperture D/f is 1/5.6; the angle of view is 70 °; no vignetting; at 55lp/mm, the average transfer function of the full field of view is more than 0.65; the relative distortion of the full view field is less than 0.02%; the total length of the optical system (first lens 100 to eleventh lens 120 of the optical system) is 256mm; the rear working distance was 46.4mm.
As an optimization, the materials of the first lens 100, the third lens 300 and the fourth lens 400 are all lanthanum flint glass, the material of the second lens 200 is lanthanum flint glass, the material of the fifth lens 500 is crown glass, the material of the sixth lens 600 is lanthanum crown glass, the material of the seventh lens 700 is crown glass, the material of the eighth lens 800 is fluorine crown glass, the material of the ninth lens 900 is crown glass, the material of the tenth lens 110 is crown glass, and the material of the eleventh lens 120 is crown glass.
The application adopts the combination light path type of the first lens 100 with positive focal power, which is inverse long distance and telecentric in image space, ensures the design quality of high resolution and low distortion under large-view-field imaging, greatly improves the illumination uniformity of an image surface, improves the edge illumination uniformity from 45% to 75.8%, improves the amplitude to more than 68.4%, can obtain large-scale image information with more uniform illumination, and is beneficial to improving the quality of remote sensing images;
the design of a near telecentric light path is realized in the image space, the telecentricity is controlled within 1.2 degrees, the illuminance distribution of the image surface is improved from being in direct proportion to the square of the cosine of the angle of view to being in direct proportion to the square of the cosine of the angle of view in the prior art, and the illuminance uniformity of the image surface is greatly improved.
Another benefit of near telecentric optical path design is that the assembly tolerance of the large target CCD or CMOS detector and the optical system is more relaxed, reducing the manufacturing difficulty.
On the premise of realizing a large imaging view field, the application reasonably distributes the focal power of each lens, combines and corrects primary and advanced aberration, and adopts 11 pieces of conventional lens glass materials to meet the requirements of good illumination uniformity, good imaging quality and light and small size, and manufacturers of the glass materials keep high smelting frequency and stock throughout the year, thereby greatly reducing the processing and manufacturing cost of an optical system.
The application adopts the global lens to realize better control of distortion, the relative distortion of the whole view field is not more than 0.02 percent, and the difficulty of correcting the residual image distortion in image processing is reduced.
The application has excellent imaging quality, and the average transfer function of the full field of view is better than 0.65@55lp/mm.
Referring to fig. 2, fig. 2 shows the distribution of the optical transfer function curve of the whole optical system in the example of the present application, and the average optical transfer function value of the optical system exceeds 0.65 at 55lp/mm, so that the imaging quality is good.
Referring to fig. 3, fig. 3 represents a distortion distribution curve of an optical system of an example of the present application, wherein distortion is not more than 0.02%, and the difficulty of geometric distortion correction of subsequent digital images is reduced.
Referring to fig. 4, fig. 4 shows a vertical aberration curve of the optical system according to the embodiment of the present application, and coma aberration, astigmatism, and other aberrations affecting the symmetric distribution of the light spot are well corrected.
Referring to fig. 5 and 6, by comparing fig. 5 and 6, the effect of improving the uniformity of the illuminance of the image surface can be obtained, and fig. 5 is an illuminance distribution diagram of the optical system of the existing digital aviation mapping camera, wherein the relative illuminance of the field of view at the edge is only 45.0%; FIG. 6 shows the illuminance distribution diagram of the optical system of the present application, with the relative illuminance at the edge field up to 75.8% and the lift up to 68.4%.
While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the application, and these modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (8)
1. A digital aerial survey panchromatic camera telecentric optical system, comprising: a front lens group, a middle lens group and a rear lens group which are sequentially arranged from left to right along the incidence direction of light rays;
the front lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged; the middle lens group comprises a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged; the rear lens includes an eleventh lens;
the first lens and the sixth lens are meniscus lenses with positive focal power, the second lens, the third lens, the fourth lens and the tenth lens are meniscus lenses with negative focal power, the fifth lens, the eighth lens, the ninth lens and the eleventh lens are biconvex lenses with positive focal power, and the seventh lens is biconcave lens with negative focal power;
the inverse angle amplification rate of the front lens group on the chief ray of the out-of-axis view field is 1/gamma, wherein 1/gamma satisfies:
1.25≤1/γ≤1.45；
the ratio of the focal power phi A of the front lens group to the focal power phi of the optical system is as follows:
-1.65≤φA/φ≤-1.20；
the ratio of the focal power phi B of the middle lens group to the focal power phi of the optical system is as follows:
1.25≤φB/φ≤1.55；
the ratio of the focal power phi C of the rear lens group to the focal power phi of the optical system is as follows:
0.45≤φC/φ≤0.58；
wherein phiA is the focal power of the front lens group, phiB is the focal power of the middle lens group, phiC is the focal power of the rear lens group, and phiA is the focal power of the optical system.
2. A digital aerial survey panchromatic camera telecentric optical system of claim 1, wherein: the first lens and the second lens form a double-cemented lens.
3. A digital aerial survey panchromatic camera telecentric optical system of claim 1, wherein: the sixth lens, the seventh lens and the eighth lens form a triple cemented lens.
4. A digital aerial survey panchromatic camera telecentric optical system of claim 1, wherein: the fifth lens and the sixth lens are thick lenses.
5. A digital aerial survey panchromatic camera telecentric optical system of claim 1, wherein: the optical surface of the fifth lens close to the diaphragm is a first optical surface, the optical surface of the sixth lens close to the diaphragm is a second optical surface, the height of the on-axis view field edge light ray of the optical system on the first optical surface is h1, the height of the on-axis view field edge light ray of the optical system on the second optical surface is h1, and the h1 and h2 satisfy the following conditions:
0.96≤|h1/h2|≤1.08。
6. a digital aerial survey panchromatic camera telecentric optical system of claim 5, wherein: the height of the off-axis field chief ray of the optical system on the first optical surface is hz1, and the height of the off-axis field chief ray of the optical system on the second optical surface is hz2, wherein hz1 and hz2 satisfy the following conditions:
1.5≤|hz1/hz2|≤2.0。
7. a digital aerial survey panchromatic camera telecentric optical system of claim 1, wherein: the first lens, the third lens and the fourth lens are made of lanthanum flint glass, the second lens is made of lanthanum flint glass, the fifth lens is made of lanthanum flint glass, the sixth lens is made of lanthanum flint glass, the seventh lens is made of fluorine flint glass, the ninth lens is made of crown glass, the tenth lens is made of flint glass, and the eleventh lens is made of flint glass.
8. A digital aerial survey panchromatic camera telecentric optical system of claim 1, wherein: the diaphragm is an aperture diaphragm.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5614708A (en) * | 1995-01-26 | 1997-03-25 | Hamamatsu Photonics K.K. | Optical feedback photodetection apparatus |
| JP2008083524A (en) * | 2006-09-28 | 2008-04-10 | Yokogawa Electric Corp | Both-side telecentric illumination optical system |
| CN101477240A (en) * | 2009-01-22 | 2009-07-08 | 中国科学院光电技术研究所 | Digital aerial survey panchromatic camera lens |
| CN102147519A (en) * | 2011-04-20 | 2011-08-10 | 中国科学院光电技术研究所 | Wide-angle and long-rear working distance full-color objective lens of aerial survey camera |
| CN103364928A (en) * | 2012-03-31 | 2013-10-23 | 上海微电子装备有限公司 | Projection objective lens optical system |
| JP2015215459A (en) * | 2014-05-09 | 2015-12-03 | コニカミノルタ株式会社 | Bi-telecentric optical system |
| CN106772933A (en) * | 2016-11-21 | 2017-05-31 | 中国科学院上海光学精密机械研究所 | The big visual field microcobjective optical system of wide spectrum |
| CN108020509A (en) * | 2017-12-12 | 2018-05-11 | 佛山科学技术学院 | The method and its device of a kind of optical projection tomography |
| CN109143548A (en) * | 2018-10-11 | 2019-01-04 | 佛山科学技术学院 | A kind of long reach high-resolution image bilateral telecentric optical system |
| CN109143558A (en) * | 2018-10-11 | 2019-01-04 | 佛山科学技术学院 | A kind of round-the-clock optical system of star sensor of miniaturization |
| CN109164559A (en) * | 2018-10-11 | 2019-01-08 | 佛山科学技术学院 | A kind of large-numerical aperture near-infrared image bilateral telecentric optical system |
| CN209690604U (en) * | 2019-04-29 | 2019-11-26 | 佛山科学技术学院 | A kind of number aerial mapping full-color camera telecentric optical system |
-
2019
- 2019-04-29 CN CN201910354745.0A patent/CN110007439B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5614708A (en) * | 1995-01-26 | 1997-03-25 | Hamamatsu Photonics K.K. | Optical feedback photodetection apparatus |
| JP2008083524A (en) * | 2006-09-28 | 2008-04-10 | Yokogawa Electric Corp | Both-side telecentric illumination optical system |
| CN101477240A (en) * | 2009-01-22 | 2009-07-08 | 中国科学院光电技术研究所 | Digital aerial survey panchromatic camera lens |
| CN102147519A (en) * | 2011-04-20 | 2011-08-10 | 中国科学院光电技术研究所 | Wide-angle and long-rear working distance full-color objective lens of aerial survey camera |
| CN103364928A (en) * | 2012-03-31 | 2013-10-23 | 上海微电子装备有限公司 | Projection objective lens optical system |
| JP2015215459A (en) * | 2014-05-09 | 2015-12-03 | コニカミノルタ株式会社 | Bi-telecentric optical system |
| CN106772933A (en) * | 2016-11-21 | 2017-05-31 | 中国科学院上海光学精密机械研究所 | The big visual field microcobjective optical system of wide spectrum |
| CN108020509A (en) * | 2017-12-12 | 2018-05-11 | 佛山科学技术学院 | The method and its device of a kind of optical projection tomography |
| CN109143548A (en) * | 2018-10-11 | 2019-01-04 | 佛山科学技术学院 | A kind of long reach high-resolution image bilateral telecentric optical system |
| CN109143558A (en) * | 2018-10-11 | 2019-01-04 | 佛山科学技术学院 | A kind of round-the-clock optical system of star sensor of miniaturization |
| CN109164559A (en) * | 2018-10-11 | 2019-01-08 | 佛山科学技术学院 | A kind of large-numerical aperture near-infrared image bilateral telecentric optical system |
| CN209690604U (en) * | 2019-04-29 | 2019-11-26 | 佛山科学技术学院 | A kind of number aerial mapping full-color camera telecentric optical system |
Non-Patent Citations (1)
| Title |
|---|
| 全向凝视光电成像***鱼眼透镜的设计;刘帅;牛燕雄;刘海月;;激光技术(第02期);全文 * |
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