CN102353389A - System for improving imaging resolution of array detector and realization method for system - Google Patents
System for improving imaging resolution of array detector and realization method for system Download PDFInfo
- Publication number
- CN102353389A CN102353389A CN2011102069440A CN201110206944A CN102353389A CN 102353389 A CN102353389 A CN 102353389A CN 2011102069440 A CN2011102069440 A CN 2011102069440A CN 201110206944 A CN201110206944 A CN 201110206944A CN 102353389 A CN102353389 A CN 102353389A
- Authority
- CN
- China
- Prior art keywords
- wedge
- image
- modulator
- imaging resolution
- resolution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a system for improving the imaging resolution of an array detector and a realization method for the system. The system for improving the imaging resolution of the array detector comprises an optical wedge modulator, a camera lens, a color separation filter and a detector unit which are arranged sequentially. An imaging plane can be slightly moved for multiple times by rotating the optical wedge modulator to acquire a plurality of images with complementary information intervals, and the images with the complementary information intervals are further synthesized into a high-resolution image, so that the aim of improving the imaging resolution of the array detector is fulfilled.
Description
Technical field
The present invention relates to the photoelectronic imaging technical field, particularly a kind of system and its implementation that improves the detector array imaging resolution.
Background technology
Along with the develop rapidly of photoelectronic imaging technology, the mode of utilizing detector array to carry out photoelectronic imaging has obtained using widely.
Said detector array is the indispensable device of image acquisition and digitized processing; Its spatial resolution (spatial resolution understand intuitively be exactly can recognition object through instrument critical geometry) receive the restriction of the pixel geometry size of array detection device; A part of information of being gathered target is lost, thereby cause the decline of image resolution ratio.With CCD (Charge-coupled Device; Charge coupled cell) picture pick-up device is that example describes; Each photosensitive unit of CCD picture pick-up device all separates; Therefore; What CCD detected is not the information of entire image, but the part that is wherein covered by photosurface, the signal of reading is the mean intensity on the photosensitive unit light-sensitive surface; Then, the process analog to digital conversion is stored with the mode of digital signal and is shown.Therefore CCD is not continuous to signals sampling, but shows with discontinuous form with the continuous target image of rect.p., and this will make the resolution of image reduce.In order to obtain satisfactory original image, must improve the resolution of ccd image, the information that will lose recovers.
Improve the resolution of ccd image, thereby obtaining to have small relative displacement takes place between picture that the image of sampling interval can become through object and the ccd image sensor writes down multiple image and realizes.But, therefore to control big at low precision, the operating difficulties that μ m magnitude moves as the plane because the CCD pixel size probably has only 10 μ m.In the prior art, adopt mechanical scanning mode or repeatedly mobile detector array to realize usually.But, this method low precision, difficulty height, the very difficulty that operates is unfavorable for being applied on the high detector array of accuracy requirement.
Therefore, how to improve the imaging resolution of array detection device, become to need badly the key issue of solution.
Summary of the invention
Weak point in view of above-mentioned prior art; The object of the present invention is to provide a kind of system and its implementation that improves the detector array imaging resolution; Having overcome classic method adopts the mechanical scanning mode or repeatedly moves detector array low precision, the shortcoming that difficulty is high.
In order to achieve the above object, the present invention has taked following technical scheme:
A kind of system that improves the detector array imaging resolution, it comprises:
The wedge modulator, it comprises first wedge and second wedge, and the in the same way placement parallel with the principal section of second wedge of said first wedge;
Camera lens;
The color separation filter;
Detector cells;
Wherein, said wedge modulator, camera lens, color separation filter and detector cells are placed successively; The optical axis of said wedge modulator and the optical axis coincidence of camera lens, the Surface Vertical at the optical axis of said camera lens and detector cells place, and in the surperficial center of detector cells.
The system of described raising detector array imaging resolution, wherein, said detector cells is CCD.
The system of described raising detector array imaging resolution, wherein, the refraction angle of said first wedge and second wedge is 0.028rad, and refractive index is 1.5.
The system of described raising detector array imaging resolution, wherein, the focal length of said camera lens is 16mm.
A kind of implementation method of system of described raising detector array imaging resolution wherein, said method comprising the steps of:
S1, the said wedge modulator object that aims at the mark;
S2, under the non-rotary situation of wedge modulator, clap image, and with it as the middle part image;
S3, second wedge, 178.7210 degree that turn clockwise obtain moving down image;
S4, first wedge, 180 degree that turn clockwise, second wedge, 180 degree that turn clockwise obtain moving image;
S5, first wedge, 90 degree that turn clockwise, second wedge, 90 degree that turn clockwise obtain the image that moves to left;
S6, first wedge, 180 degree that turn clockwise, second wedge, 180 degree that turn clockwise obtain the image that moves to right;
S7, through the middle part image, on move image, move down image, move to left image and the image that moves to right obtain high-resolution image.
System and its implementation of raising detector array imaging resolution provided by the invention, the system of said raising detector array imaging resolution comprise wedge modulator, camera lens, color separation filter and the detector cells of placing successively.Make imaging plane that repeatedly minute movement take place through the rotating wedge modulator; Thereby obtain several and have the interval image of complementary information; And then, reach the purpose that improves the detector array imaging resolution with the said synthetic panel height image in different resolution of image with complementary information interval.
Description of drawings
Fig. 1 is the structural representation of better embodiment of the system of raising detector array imaging resolution of the present invention.
Fig. 2 is the light path principle synoptic diagram of prior art refracting prisms.
Fig. 3 a, 3b and 3c are respectively wedge modulator in the system shown in Figure 1 (comprising two wedges) around the counterrotating light path principle synoptic diagram of optical axis.
Fig. 4 is the light path principle synoptic diagram of system shown in Figure 1.
Fig. 5 improves the process flow diagram of detector array imaging resolution system implementation method for the present invention.
Fig. 6 is for calculating the principle schematic of high-definition picture in the method shown in Figure 5 through low-resolution image.
Embodiment
The invention provides a kind of system and its implementation that improves the detector array imaging resolution.For making the object of the invention, technical scheme and effect clearer, clear and definite, below with reference to accompanying drawing and give an actual example to further explain of the present invention.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 is the synoptic diagram of the system of raising detector array imaging resolution of the present invention.As shown in the figure, the system of said raising detector array imaging resolution comprises: the wedge modulator 100 of Fang Zhiing, camera lens 200, color separation filter 300 and detector cells 400 successively.The optical axis coincidence of the optical axis of said wedge modulator 100 and camera lens 200, the Surface Vertical at the optical axis of said camera lens 200 and detector cells 400 places, and in the center on detector cells 400 surfaces.
Clear in order to describe, introduce the refracting prisms principle of work of (claiming wedge again) below earlier.Fig. 2 is the light path principle synoptic diagram of refracting prisms, and as shown in the figure, refracting prisms reflect light through two refractive surfaces (incident surface A and exit facet B).Angle between incident surface A and exit facet B is called the refraction angle of refracting prisms, representes with α.The intersection of two planes of refraction is called refracting edge, is called the principal section of refracting prisms perpendicular to the plane of refracting edge.The angle of emergent ray and incident ray is called angle of deviation, representes with δ, and establishing the prismatic refraction rate is n, and light is respectively I1 and I2 at the incident angle and the refraction angle of incident surface A, at incident angle and the refraction angle of exit facet B is-I3 and-I4.(its positive and negative being defined as: turn to emergent ray by incident ray with acute angle) clockwise for just, counterclockwise for negative.Because the refraction angle α of wedge is very little, the plane of incidence and exit facet can be regarded two parallel flats as, and when I1 was very little, angle of deviation can satisfy: the α of δ=(n-1).
When two wedges were combined, shown in Fig. 3 a, when the refraction angle of two wedges (first wedge 110 and second wedge 120) all was α, angle of deviation (angle of emergent ray and incident ray) δ was maximum, is the twice of monochromatic light wedge, that is: δ
Max=2 (n-1) α.Shown in Fig. 3 b, when arbitrary wedge during around optical axis Rotate 180 °, this moment, the effect of two wedges was equivalent to parallel flat, δ=0.Shown in Fig. 3 c, when two wedges rotate around optical axis relatively, when its rotation angle was m (not marking among the figure), then angle of deviation δ changed with the variation of the anglec of rotation m of institute, and its expression formula is: δ
Max=2 (n-1) α cos (m/2).
As shown in Figure 1, wedge modulator 100 provided by the invention comprises first wedge 110 and second wedge 120 parallel and that place in the same way, rotates the direction of propagation of light modulated around its optical axis through making two wedges.The major function of camera lens 200 is for collecting the illuminated object reflected light and it being focused on the detector cells 400.
In the system of raising detector array imaging resolution of the present invention; Wedge modulator 100 (comprising first wedge 110 and second wedge 120) is placed in the system of raising detector array imaging resolution as shown in Figure 1; First wedge 110 and second wedge 120 rotate the e1 degree respectively; When e2 spends (following formula and irrelevant to rotation direction); Behind the light process wedge modulator 100, its angle of deviation is δ.The formula of the track H of picture point on the CCD face is:
H=f*tan(δ)
=f*tan(2(n-1)αcos(φ/2))
=f*tan(2(n-1)αcos(（e1+e2）/2))。Formula (1)
Wherein, f is the focal length of camera lens 200.
The light path synoptic diagram that improves detector array imaging resolution system for the present invention shown in Figure 4.When the user to the deflection required precision of light path during up to μ m magnitude; Make the displacement request of 1/2nd pixels: target y takes place on detector array image picture point y1 (in embodiments of the present invention at detector cells; Detector cells described below all is example with CCD) displacement of X-direction is less than 5 μ m; The picture point y1 of target y moves less than 5 μ m the Y direction of CCD; When the final position of picture point at CCD(x=0 μ m; Y=5 μ m) time; Refractive index n=1.5; Focal distance f=16mm; During refraction angle α=0.028rad; Bring each parameter into formula (1); Can calculate the anglec of rotation (because when beginning of two wedges; Two parallel placements of wedge, this moment, the anglec of rotation was relative angle) φ=178.7210 degree.The turntable that reaches 0.1mrad through corner accuracy can guarantee that pixel moves, and illustrates that this programme is very feasible in μ m.
The present invention also provides a kind of implementation method that improves the detector array imaging resolution, and based on above-mentioned raising detector array imaging resolution system, the refraction angle α of said first wedge and second wedge is 0.028rad, refractive index n=1.5.The focal length of camera lens is f=16mm.As shown in Figure 5, said method comprising the steps of:
S1, the said wedge modulator object that aims at the mark;
S2, under the non-rotary situation of wedge modulator, clap image, and with it as the middle part image;
S3, second wedge, 178.7210 degree that turn clockwise obtain moving down image;
S4, first wedge, 180 degree that turn clockwise, second wedge, 180 degree that turn clockwise obtain moving image;
S5, first wedge, 90 degree that turn clockwise, second wedge, 90 degree that turn clockwise obtain the image that moves to left;
S6, first wedge, 180 degree that turn clockwise, second wedge, 180 degree that turn clockwise obtain the image that moves to right;
S7, through the middle part image, on move image, move down image, move to left image and the image that moves to right obtain high-resolution image.
Retraced below and stated down how to obtain high-resolution image among the step S7; Because the situation more complicated of two-dimensional array CCD imaging; But its principle is consistent with one dimensional linear array CCD, so followingly improve 2 times embodiment with one dimensional linear array CCD imaging resolution this method is described.See also Fig. 6, suppose that " truly " image (being full resolution pricture (a)) has only 1 row, and have only 8 pixels: wherein A1-A8 representes 8 unknown pixel in the full resolution pricture.Said A1-A8 can try to achieve by the low resolution image below high-definition picture.Wherein, the left margin of pixel B 1 aligns with the left margin of pixel A 1 in the full resolution pricture (a) in the low-resolution image (b), according to geometric relationship, and B4 right margin and the alignment of A8 right margin.If do not consider the influence of the ignorance factors such as distortion that imaging lens causes, meet following analytic relationship in low-resolution image and the full resolution pricture between each grey scale pixel value:
G
B1=(G
A1+ G
A2) * 1/ K ... Formula (4)
G
B5=(G
A2+ G
A3) * 1/K ... Formula (5)
In the formula, K is the multiple that resolution improves, G
B1, G
B5, G
A1Deng the gray-scale value that is respectively pixel B 1, B5, A1 etc.In the present embodiment, resolution improves 2 times, i.e. K=2.Can find out from formula (4), (5) by G
B1, G
B5Separate G
A1, G
A2, G
A3The situation that overdetermination is separated has appearred in three unknown numbers, promptly unknown number separate not unique.So, how just can obtain unique solution in the present invention, adopt to make G in the high-definition picture
A1Initial gray-scale value G
A1Be zero.Can get so, and by formula (4), (5):
G
A1=0;
G
A2=2 * G
B1Formula (6)
Can solve G by that analogy
A3, G
A4, G
A5, G
A6, G
A7, G
A8Value.So; Only need to move once respectively for two dimensional image in level and vertical direction; Each dislocation 1/2 pixel; Obtain 4 width of cloth low-resolution images (comprising original image); Through type (6) acquires the analytic relationship between each grey scale pixel value in low-resolution image and the full resolution pricture, can solve level and vertical direction resolution all improves 2 times image.In the implementation method of the system of the raising detector array imaging resolution of the embodiment of the invention; The image that moves to left is equivalent to the low-resolution image (b) among Fig. 6; The image that moves to right is equivalent to the low-resolution image (c) among Fig. 6; Then, can calculate on width resolution through formula (6) again and improve two times image.In like manner, (moving image promptly and moving down image) image that also can obtain two times of resolution raisings in height through formula (6) on the short transverse.Finally, obtain high-resolution image.
In like manner can get, when two-dimensional array CCD imaging or aerial image, its principle is consistent with one dimensional linear array CCD, so can adopt this method to improve the detector array imaging resolution.
System and its implementation of raising detector array imaging resolution provided by the invention, the system of said raising detector array imaging resolution comprise wedge modulator, camera lens, color separation filter and the detector cells of placing successively.Make imaging plane that repeatedly minute movement take place through the rotating wedge modulator; Thereby obtain several and have the interval image of complementary information; And then, reach the purpose that improves the detector array imaging resolution with the said synthetic panel height image in different resolution of image with complementary information interval.
Be understandable that, concerning those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the present invention.
Claims (5)
1. a system that improves the detector array imaging resolution is characterized in that, comprising:
The wedge modulator, it comprises first wedge and second wedge, and the in the same way placement parallel with the principal section of second wedge of said first wedge;
Camera lens;
The color separation filter;
Detector cells;
Wherein, said wedge modulator, camera lens, color separation filter and detector cells are placed successively; The optical axis of said wedge modulator and the optical axis coincidence of camera lens, the Surface Vertical at the optical axis of said camera lens and detector cells place, and be positioned at the surperficial center of detector cells.
2. the system of raising detector array imaging resolution according to claim 1 is characterized in that, said detector cells is CCD.
3. the system of raising detector array imaging resolution according to claim 1 is characterized in that, the refraction angle of said first wedge and second wedge is 0.028rad, and refractive index is 1.5.
4. the system of raising detector array imaging resolution according to claim 1 is characterized in that, the focal length of said camera lens is 16mm.
5. the implementation method of the system of the described raising detector array of claim 1 imaging resolution is characterized in that, said method comprising the steps of:
S1, with the wedge modulator object that aims at the mark;
S2, under the non-rotary situation of wedge modulator, clap image, and with it as the middle part image;
S3, with second wedge turn clockwise 178.7210 the degree, obtain moving down image;
S4, with first wedge, first wedge 180 degree that turns clockwise, with the second wedge dextrorotation turnback, obtain moving image;
S5, the first wedge dextrorotation is turn 90 degrees, the second wedge dextrorotation is turn 90 degrees, obtain the image that moves to left;
S6, with the first wedge dextrorotation turnback, with the second wedge dextrorotation turnback, obtain the image that moves to right;
S7, through the middle part image, on move image, move down image, move to left image and the image that moves to right obtain high-resolution image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102069440A CN102353389A (en) | 2011-07-22 | 2011-07-22 | System for improving imaging resolution of array detector and realization method for system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102069440A CN102353389A (en) | 2011-07-22 | 2011-07-22 | System for improving imaging resolution of array detector and realization method for system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102353389A true CN102353389A (en) | 2012-02-15 |
Family
ID=45577005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102069440A Pending CN102353389A (en) | 2011-07-22 | 2011-07-22 | System for improving imaging resolution of array detector and realization method for system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102353389A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570383A (en) * | 2015-01-07 | 2015-04-29 | 北京理工大学 | Large-view-field super-resolution imaging system adjustable in resolution |
| CN109307936A (en) * | 2018-11-28 | 2019-02-05 | 湖北华中光电科技有限公司 | A kind of auxiliary device for accelerating astro tracker pointing velocity |
| CN109981946A (en) * | 2019-03-11 | 2019-07-05 | 歌尔股份有限公司 | A kind of camera, camera control method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994027172A1 (en) * | 1993-05-11 | 1994-11-24 | Norand Corporation | Focusing method and apparatus for reading two dimensional optical information sets and the like |
| CN1527140A (en) * | 2003-03-06 | 2004-09-08 | Asml | Device and method for operating and transmitting metrological light beam |
| CN102095571A (en) * | 2010-12-02 | 2011-06-15 | 杭州奥普特光学有限公司 | Automatic lensmeter |
| CN201876608U (en) * | 2010-10-22 | 2011-06-22 | 中国航空工业集团公司洛阳电光设备研究所 | Infrared optical system adopting double optical wedges for focusing |
-
2011
- 2011-07-22 CN CN2011102069440A patent/CN102353389A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994027172A1 (en) * | 1993-05-11 | 1994-11-24 | Norand Corporation | Focusing method and apparatus for reading two dimensional optical information sets and the like |
| CN1527140A (en) * | 2003-03-06 | 2004-09-08 | Asml | Device and method for operating and transmitting metrological light beam |
| CN201876608U (en) * | 2010-10-22 | 2011-06-22 | 中国航空工业集团公司洛阳电光设备研究所 | Infrared optical system adopting double optical wedges for focusing |
| CN102095571A (en) * | 2010-12-02 | 2011-06-15 | 杭州奥普特光学有限公司 | Automatic lensmeter |
Non-Patent Citations (1)
| Title |
|---|
| 韩军等: "光电成像系统超分辨成像技术方法研究", 《应用光学》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570383A (en) * | 2015-01-07 | 2015-04-29 | 北京理工大学 | Large-view-field super-resolution imaging system adjustable in resolution |
| CN109307936A (en) * | 2018-11-28 | 2019-02-05 | 湖北华中光电科技有限公司 | A kind of auxiliary device for accelerating astro tracker pointing velocity |
| CN109307936B (en) * | 2018-11-28 | 2020-11-20 | 湖北华中光电科技有限公司 | Accelerate auxiliary device of astronomical director speed of aiming |
| CN109981946A (en) * | 2019-03-11 | 2019-07-05 | 歌尔股份有限公司 | A kind of camera, camera control method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103471715B (en) | A kind of light path combined type light field spectrum imaging method and device altogether | |
| CN103472592B (en) | A kind of fast high-throughout polarization imaging method of illuminated and polarization imager | |
| US9471994B2 (en) | Image based systems for detecting information on moving objects | |
| CN101571375B (en) | On-line data measuring method for regular polygon measured object based on machine vision and system | |
| CN104317156B (en) | Homocentric sphere object lens detector spherical array video acquisition device | |
| US20170371142A1 (en) | Circular Scanning Technique For Large Area Inspection | |
| CN106488148B (en) | A kind of super-resolution image sensor and its building method | |
| US2859653A (en) | Wide-angle prism scanner | |
| CN102353376B (en) | Panoramic imaging earth sensor | |
| JP2003148919A (en) | Device and method for detecting three-dimensional relative movement | |
| CN101256275A (en) | Microminiaturization co-image face panoramic imagery technique | |
| CN104360464B (en) | Continuous zooming optical system | |
| Tabata et al. | High-speed 3D sensing with three-view geometry using a segmented pattern | |
| KR20180053668A (en) | Method and apparatus for generating data representing a pixel beam | |
| CN101285885A (en) | Method for accomplishing high light spectrum image-forming | |
| CN102353389A (en) | System for improving imaging resolution of array detector and realization method for system | |
| EP1112473B1 (en) | Apparatus for surface image sensing and surface inspection of three-dimensional structures | |
| CN103491296A (en) | Method for achieving high-speed camera shooting | |
| CN110322561A (en) | 3D camera and its measurement method for the unordered sorting of robot | |
| CN103175527A (en) | Large-visual-field and low-power-consumption earth sensor system applied to microsatellite | |
| CN103969829A (en) | Single-detector optical imaging system and method based on MEMS micro scanning mirror | |
| US20230026858A1 (en) | Optical transmitting apparatus and electronic device | |
| CN111583191A (en) | Light field EPI Fourier transform-based refraction characteristic detection method | |
| CN110969576A (en) | Highway pavement image splicing method based on roadside PTZ camera | |
| CN107845077B (en) | Method for correcting asymmetric deformation of DMD micromirror element imaging and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120215 |