CN110646947B - Pupil space modulation device and method - Google Patents
Pupil space modulation device and method Download PDFInfo
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- CN110646947B CN110646947B CN201910858647.0A CN201910858647A CN110646947B CN 110646947 B CN110646947 B CN 110646947B CN 201910858647 A CN201910858647 A CN 201910858647A CN 110646947 B CN110646947 B CN 110646947B
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- 210000001747 pupil Anatomy 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003384 imaging method Methods 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 1
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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
- G02B27/58—Optics for apodization or superresolution; Optical synthetic aperture systems
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Abstract
The invention discloses a novel pupil space modulation method and a device, wherein a support rod is connected in the middle of a base of the device, three bearings are respectively sleeved on the support rod, wherein a first bearing is connected with a first connecting rod, the tail end of the first connecting rod is connected with a first semi-transparent semi-reflective mirror, the middle position of the first connecting rod is connected with a second connecting rod, and the tail end of the second connecting rod is provided with a first planar array detector; the second bearing is connected with a fourth connecting rod, the tail end of the fourth connecting rod is connected with a second semi-transparent semi-reflective mirror, the middle position of the fourth connecting rod is connected with a fifth connecting rod, and the tail end of the fifth connecting rod is provided with a third array detector; the third bearing is connected with a third connecting rod, and the tail end of the third connecting rod is provided with a second area array detector. The invention can simultaneously carry out spatial modulation on the reference pupil and the residual pupil of the sparse optical synthetic aperture imaging system, has high modulation speed and can better meet the detection requirement on the common-phase error of the sparse optical synthetic aperture imaging system.
Description
Technical Field
The invention belongs to the field of sparse optical synthetic aperture, and particularly relates to a novel pupil space modulation method and device for pupil space modulation in a synthetic aperture imaging system common-phase error detection technology.
Background
In an astronomical telescope, in order to ensure high resolution, the caliber size of a single-caliber telescope needs to be greatly increased, and a series of problems of heavy weight, large volume, high manufacturing cost, high manufacturing difficulty and the like can be caused along with the increase of the caliber, so that a traditional single-caliber telescope is gradually replaced by a sparse optical synthetic aperture imaging system. In a sparse optical synthetic aperture imaging system, in order to ensure the imaging quality, the problem of the common phase error among the sub apertures must be solved. In order to solve this problem, a common phase error detection technique has been gradually developed.
When the technology is used for detecting the common-phase error of a sparse optical synthetic aperture imaging system, firstly, the phase distribution of the system needs to be obtained, and the current methods mainly comprise two methods, namely: pupil phase shift modulation and pupil space modulation, wherein the pupil phase shift modulation method introduces a specific phase shift amount to the system by slightly moving a reference pupil positioned on an exit pupil surface back and forth along an optical axis, and the method can accurately obtain the phase distribution of the system, but due to the introduction of the reference pupil, a series of other bad influences can be brought, so that the calculation process is complicated, and meanwhile, the modulated phase also needs to meet specific conditions; another method is to add an electronic shutter to the sub-pupils of the system to achieve spatial modulation of the various sub-paths of the system. The reference pupil, other pupils and the point spread function of the system can be respectively obtained through spatial modulation and an area array detector, and partial phase distribution under the wavelength condition can be obtained through Fourier transform and deconvolution. The method simplifies the system structure and simplifies the calculation process because the reference pupil outside the sub-pupil is not required to be added additionally. The spatial modulation part is time consuming because this method requires modulation of all sub-apertures of the system.
Disclosure of Invention
The invention aims to provide a novel pupil space modulation method and a novel pupil space modulation device, which can reduce the pupil space modulation time in the sparse optical synthetic aperture imaging system common-phase error detection technology and obtain higher detection efficiency.
The technical scheme adopted by the invention is as follows: a pupil space modulation device comprises a base 1, a supporting rod, bearings 2, a first connecting rod 3, a first area array detector 4, a first semi-transparent semi-reflecting mirror 5, a third connecting rod 6, a second area array detector 7, a second semi-transparent semi-reflecting mirror 8, a fourth connecting rod 9, a third area array detector 10, a second connecting rod 11 and a fifth connecting rod 12, wherein the middle of the base 1 is connected with the supporting rod, the supporting rod is respectively sleeved with the three bearings 2, one of the bearings is connected with the first connecting rod 3, the tail end of the first connecting rod is connected with the first semi-transparent semi-reflecting mirror 5, the middle of the first connecting rod is connected with the second connecting rod 11, and the tail end of the second connecting rod is provided with the first area array detector 4; the second bearing is connected with a fourth connecting rod 9, the tail end of the fourth connecting rod 9 is connected with a second half-mirror 8, the middle position of the fourth connecting rod is connected with a fifth connecting rod 12, and the tail end of the fifth connecting rod is provided with a third array detector 10; the third bearing is connected with a third connecting rod 6, and the tail end of the third connecting rod is provided with a second area array detector 7.
The method for using the pupil space modulation device comprises the following steps:
(1) when detecting the common-phase error of the sparse optical synthetic aperture imaging system, firstly adjusting the first connecting rod 3, enabling the light path to pass through a sub-pupil at the edge and then pass through the first half-transmitting half-reflecting mirror 5 on the first connecting rod 3, adjusting the length of the second connecting rod 11 and rotating the angle of the first area array detector 4, enabling the first area array detector 4 to receive on the focal plane of reflected light, and then obtaining the point spread function of the sub-pupil;
(2) secondly, adjusting a fourth connecting rod 9, enabling the light of the residual sub-pupils to pass through a second half-mirror 8 on the fourth connecting rod 9, adjusting the length of a fifth connecting rod 12 and rotating the angle of a third array detector 10, and enabling the third array detector 10 to receive the light on a focal plane of reflected light, so that a point spread function of the residual sub-pupils can be obtained;
(3) and finally, adjusting the third connecting rod 6 to enable the second area array detector 7 to be positioned on a focal plane of all transmitted light for receiving, and further obtaining a point spread function of the whole system, so that the spatial modulation of all apertures is completed.
Further, all three bearings can be rotated 360 ° along the support bar in a plane parallel to the chassis.
Further, the first link 3, the third link 6, and the fourth link 9 may be rotated in the pitch direction.
Furthermore, the first, second and third array detectors are respectively connected with the tail ends of the second, fifth and third connecting rods by universal balls and can rotate freely.
Further, the first, second and third array detectors may be CCD cameras or CMOS cameras.
Furthermore, the two half mirrors are one big and one small, the second half mirror 8 is big, the first half mirror 5 is small, the small half mirror can let the light of a single sub-aperture pass through, and the big half mirror can let the light of all the rest sub-apertures pass through.
Further, the two half mirrors can be replaced by a beam splitter.
Further, the lengths of the first link 3, the third link 6, the fourth link 9, the second link 11, and the fifth link 12 are adjustable.
Compared with the prior device, the invention has the following obvious advantages:
(1) by using the device, three desired point spread functions can be obtained only by correctly placing the device in a light path, thereby greatly accelerating the spatial modulation of all apertures and improving the detection efficiency.
(2) Compared with adding an electronic shutter for each sub-aperture, the device can obviously simplify the structure of an optical path.
Drawings
FIG. 1 is a diagram of a novel pupil spatial modulation device.
Fig. 2 is a simplified diagram of the modulation device in the optical path.
In the figure: the optical fiber laser imaging device comprises a base 1, a bearing 2, a first connecting rod 3, a first area array detector 4, a first semi-transparent semi-reflecting mirror 5, a third connecting rod 6, a second area array detector 7, a second semi-transparent semi-reflecting mirror 8, a fourth connecting rod 9, a third area array detector 10, a second connecting rod 11, a fifth connecting rod 12 and an imaging lens 13.
Detailed Description
The device is further described with reference to the accompanying drawings and the specific implementation steps.
As shown in fig. 1, the pupil space modulation apparatus of the present invention includes a base 1, a support rod, a bearing 2, a first link 3, a first area array detector 4, a first half mirror 5, a third link 6, a second area array detector 7, a second half mirror 8, a fourth link 9, a third area array detector 10, a second link 11 and a fifth link 12, wherein the support rod is connected to the middle of the base 1, the three bearings 2 are respectively sleeved on the support rod, one of the bearings is connected to the first link 3, the first half mirror 5 is connected to the end of the first link, the second link 11 is connected to the middle of the first link, and the first area array detector 4 is installed at the end of the second link 11; the second bearing is connected with a fourth connecting rod 9, the tail end of the fourth connecting rod 9 is connected with a second half-mirror 8, the middle position of the fourth connecting rod is connected with a fifth connecting rod 12, and the tail end of the fifth connecting rod is provided with a third array detector 10; the third bearing is connected with a third connecting rod 6, and the tail end of the third connecting rod is provided with a second area array detector 7. The system sub-mirror surface can be modulated by rotating the two semi-transparent semi-reflecting mirrors; the point spread function can be obtained by rotating the three area array detectors.
The use method of the pupil space modulation device comprises the following steps:
(1) when detecting the common-phase error of the sparse optical synthetic aperture imaging system, firstly adjusting the first connecting rod 3, enabling the light path to pass through a sub-pupil at the edge and then pass through the first half-transmitting half-reflecting mirror 5 on the first connecting rod 3, adjusting the angle of the second connecting rod 11 and rotating the angle of the first area array detector 4, enabling the first area array detector 4 to receive on the focal plane of reflected light, and then obtaining the point spread function of the sub-pupil;
(2) secondly, adjusting a fourth connecting rod 9, enabling the light of the residual sub-pupils to pass through a second half-mirror 8 on the fourth connecting rod 9, adjusting the length of a fifth connecting rod 12 and rotating the angle of a third array detector 10, and enabling the third array detector 10 to receive the light on a focal plane of reflected light, so that a point spread function of the residual sub-pupils can be obtained;
(3) finally, adjusting the third connecting rod 6 to enable the second area array detector 7 to be positioned on all focal planes of the transmitted light for receiving, and further obtaining a point spread function of the whole system;
finally, a simple light path diagram as shown in fig. 2 is obtained, and thus, the spatial modulation of all the apertures is completed.
Claims (9)
1. A pupil spatial modulation apparatus, characterized by: the device comprises a base (1), a supporting rod, bearings (2), a first connecting rod (3), a first area array detector (4), a first semi-transparent semi-reflecting mirror (5), a third connecting rod (6), a second area array detector (7), a second semi-transparent semi-reflecting mirror (8), a fourth connecting rod (9), a third area array detector (10), a second connecting rod (11) and a fifth connecting rod (12), wherein the middle of the base (1) is connected with the supporting rod, the supporting rod is respectively sleeved with the three bearings, the first bearing is connected with the first connecting rod (3), the tail end of the first connecting rod is connected with the first semi-transparent semi-reflecting mirror (5), the middle of the first connecting rod is connected with the second connecting rod (11), and the tail end of the second connecting rod is provided with the first area array detector (4); the second bearing is connected with a fourth connecting rod (9), the tail end of the fourth connecting rod (9) is connected with a second half-mirror (8), the middle position of the fourth connecting rod is connected with a fifth connecting rod (12), and the tail end of the fifth connecting rod is provided with a third array detector (10); the third bearing is connected with a third connecting rod (6), and the tail end of the third connecting rod is provided with a second area array detector (7).
2. A pupil space modulation method using the pupil space modulation device according to claim 1, characterized in that: the modulation method comprises the following steps:
(1) when detecting the common-phase error of the sparse optical synthetic aperture imaging system, firstly adjusting a first connecting rod (3), enabling a light path to pass through a sub-pupil at the edge and then pass through a first half-transmitting and half-reflecting mirror (5) on the first connecting rod (3), adjusting the length of a second connecting rod (11) and rotating the angle of a first area array detector (4), enabling the first area array detector (4) to receive on a focal plane of reflected light, and then obtaining a point spread function of the sub-pupil;
(2) secondly, adjusting a fourth connecting rod (9), enabling the light of the residual sub-pupils to pass through a second half-transmitting and half-reflecting mirror (8) on the fourth connecting rod (9), adjusting the length of a fifth connecting rod (12) and rotating the angle of a third array detector (10), and enabling the third array detector (10) to receive on a focal plane of reflected light, so that the point spread function of the residual sub-pupils can be obtained;
(3) and finally, adjusting a third connecting rod (6) to enable a second area array detector (7) to be positioned on a focal plane of all transmitted light for receiving, and further obtaining a point spread function of the whole system, so that the spatial modulation of all apertures is completed.
3. A method of pupil spatial modulation according to claim 2, characterized by: all three bearings can be rotated 360 deg. along the support bar in a plane parallel to the chassis.
4. A method of pupil spatial modulation according to claim 2, characterized by: the first connecting rod (3), the third connecting rod (6) and the fourth connecting rod (9) can rotate towards the pitching direction.
5. A method of pupil spatial modulation according to claim 2, characterized by: the first, second and third array detectors are respectively connected with the tail ends of the second, third and fifth connecting rods by universal balls and can rotate freely.
6. A method of pupil spatial modulation according to claim 2, characterized by: the first, second and third array detectors may be CCD cameras or CMOS cameras.
7. A method of pupil spatial modulation according to claim 2, characterized by: the two half mirrors are one big and one small, the second half mirror (8) is big, the first half mirror (5) is small, the small mirror can let the light of a single sub-aperture penetrate, and the big mirror can let the light of the rest all sub-apertures pass.
8. A method of pupil spatial modulation according to claim 2, characterized by: the two half mirrors can be replaced by a beam splitter.
9. A method of pupil spatial modulation according to claim 2, characterized by: the lengths of the first connecting rod (3), the third connecting rod (6), the fourth connecting rod (9), the second connecting rod (11) and the fifth connecting rod (12) are adjustable.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2610356Y (en) * | 2003-04-07 | 2004-04-07 | 中国船舶重工集团公司第七一一研究所 | Multi-freedom light-beam lift frame |
| CN101498588A (en) * | 2009-02-27 | 2009-08-05 | 北京空间机电研究所 | On-orbit monitoring method for 6-degree-of-freedom change between aerospace three-linear array CCD camera lenses |
| CN102122082A (en) * | 2011-03-23 | 2011-07-13 | 中国科学院光电技术研究所 | Phase shift error correction device of sparse optical synthetic aperture imaging system |
| CN102486578A (en) * | 2010-12-06 | 2012-06-06 | 中国科学院西安光学精密机械研究所 | Pupil function synthetic aperture imaging method |
| CN103018733A (en) * | 2012-12-18 | 2013-04-03 | 山东省科学院海洋仪器仪表研究所 | Focal point positioning device for astronomical telescope |
| CN103453993A (en) * | 2013-09-13 | 2013-12-18 | 中国科学院空间科学与应用研究中心 | Active hyperspectral imaging system and method based on sparse aperture compression calculation correlation |
| CN105589210A (en) * | 2016-03-10 | 2016-05-18 | 中国科学院光电技术研究所 | Digital synthetic aperture imaging method based on pupil modulation |
| CN105824030A (en) * | 2016-03-10 | 2016-08-03 | 中国科学院光电技术研究所 | Sparse optical synthetic aperture imaging method based on sub-aperture shutter modulation phase difference method |
| CN105974368A (en) * | 2016-05-10 | 2016-09-28 | 中国矿业大学 | Corner reflector integrating GNSS and DInSAR technology |
| CN106444056A (en) * | 2016-12-09 | 2017-02-22 | 中国科学院光电技术研究所 | Sparse optical synthetic aperture imaging device based on three apertures and light beam combination correction method thereof |
-
2019
- 2019-09-11 CN CN201910858647.0A patent/CN110646947B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2610356Y (en) * | 2003-04-07 | 2004-04-07 | 中国船舶重工集团公司第七一一研究所 | Multi-freedom light-beam lift frame |
| CN101498588A (en) * | 2009-02-27 | 2009-08-05 | 北京空间机电研究所 | On-orbit monitoring method for 6-degree-of-freedom change between aerospace three-linear array CCD camera lenses |
| CN102486578A (en) * | 2010-12-06 | 2012-06-06 | 中国科学院西安光学精密机械研究所 | Pupil function synthetic aperture imaging method |
| CN102122082A (en) * | 2011-03-23 | 2011-07-13 | 中国科学院光电技术研究所 | Phase shift error correction device of sparse optical synthetic aperture imaging system |
| CN103018733A (en) * | 2012-12-18 | 2013-04-03 | 山东省科学院海洋仪器仪表研究所 | Focal point positioning device for astronomical telescope |
| CN103453993A (en) * | 2013-09-13 | 2013-12-18 | 中国科学院空间科学与应用研究中心 | Active hyperspectral imaging system and method based on sparse aperture compression calculation correlation |
| CN105589210A (en) * | 2016-03-10 | 2016-05-18 | 中国科学院光电技术研究所 | Digital synthetic aperture imaging method based on pupil modulation |
| CN105824030A (en) * | 2016-03-10 | 2016-08-03 | 中国科学院光电技术研究所 | Sparse optical synthetic aperture imaging method based on sub-aperture shutter modulation phase difference method |
| CN105974368A (en) * | 2016-05-10 | 2016-09-28 | 中国矿业大学 | Corner reflector integrating GNSS and DInSAR technology |
| CN106444056A (en) * | 2016-12-09 | 2017-02-22 | 中国科学院光电技术研究所 | Sparse optical synthetic aperture imaging device based on three apertures and light beam combination correction method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 合成孔径望远镜共相误差多谱探测技术研究;董理;《中国博士学位论文全文数据库 工程科技Ⅱ辑》;20190815;第83页 * |
| 辐射状多子镜阵列结构的成像特性;刘肖尧 等;《光学学报》;20190831;第0811003-1至0811003-9页 * |
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