CN105204012B - Fourier looks in the distance the optics closed loop directing mechanism of the U-shaped baseline of art - Google Patents
Fourier looks in the distance the optics closed loop directing mechanism of the U-shaped baseline of art Download PDFInfo
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- CN105204012B CN105204012B CN201510620893.4A CN201510620893A CN105204012B CN 105204012 B CN105204012 B CN 105204012B CN 201510620893 A CN201510620893 A CN 201510620893A CN 105204012 B CN105204012 B CN 105204012B
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- mirror
- directed toward
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- closed loop
- relay lens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
Abstract
The look in the distance optics closed loop directing mechanism of the U-shaped baseline of art of Fourier is related to optical synthesis aperture technology and Beam Control technical field, which includes：U-shaped baseline mechanism and optics closed loop directing mechanism；The baseline and a baseline orthogonal with parallel baseline that U-shaped baseline mechanism is mutually parallel by two form；Optics closed loop directing mechanism includes：Beacon light source, supervision camera and relay lens and direction mirror in U-shaped baseline mechanism；Beacon light source sends light, after being directed toward mirror and relay lens reflection, converges to the target surface of supervision camera；The angle of mirror is directed toward in adjustment, and the barycenter of beacon hot spot is made to be overlapped with the target surface center of supervision camera；The present invention is by the one-dimensional size compression 1/2 of emission system baseline, from making emission system smaller, more compact structure.The accurate alignment of transmitting laser and target can be achieved, improve imaging signal-to-noise ratio and image quality.The accurate alignment of transmitting laser and target can be achieved, improve imaging signal-to-noise ratio and image quality.
Description
Technical field
The present invention relates to optical synthesis aperture technologies and Beam Control technical field, and in particular to looks in the distance art for Fourier
U-shaped baseline and optics closed loop directing mechanism.
Background technology
Laser active illuminated imaging technology overcomes imaging and passive imaging technology distance near and relies on the shortcomings of big to lamp, becomes near
One of research hotspot over year is imaged using laser interference field technology, can be by obtaining what is included in target scattering energy
The corresponding amplitude of different space frequency component and phase information reconstruct target image.One important branch of the technology is Fu
In leaf look in the distance art imaging technique (Imaging technique ofFourier telescope or Fourier
Telescopy, FT), cardinal principle is to generate various desired difference interference patterns in target surface using active laser illumination
So as to fulfill the high-resolution imaging to target.
By to the retrieval of prior art literature discovery, the look in the distance baseline configuration of art of the Fourier reported includes, circular,
Y types, cross, T-shaped, square formation and hexagon.However recover complicated from effective Fourier components number, constructional simplicity, image
The comparison of several factors such as degree and signal-to-noise ratio, is imaged for remote static target, everybody is given tacit consent to using T-type structure as transmitting
The normal structure of baseline.The GLINT plans (geo-stationary orbit light imaging government test platform) that 2000 or so the U.S. proposes just are adopted
With T-shaped baseline.However the long-armed of T-shaped baseline is 2 times of galianconism, is unfavorable for the compression of imaging system overall dimensions.
The content of the invention
In order to solve the problems in the existing technology, the present invention provides it is a kind of can be by the longer one-dimensional ruler of emission system
The U-shaped transmitting baseline configuration of very little boil down to 1/2 installs optics closed loop light beam directing mechanism in the structure.
The technical proposal for solving the technical problem of the invention is as follows：
Fourier looks in the distance the optics closed loop directing mechanism of the U-shaped baseline of art, which includes：U-shaped baseline mechanism and optics close
Ring directing mechanism；The baseline and a baseline orthogonal with parallel baseline that U-shaped baseline mechanism is mutually parallel by two form；Optics
Closed loop directing mechanism includes：Beacon light source, supervision camera and relay lens and direction mirror in U-shaped baseline mechanism,；Beacon
Light source sends light, after being directed toward mirror and relay lens reflection, converges to the target surface of supervision camera；The angle of mirror is directed toward in adjustment, is made
The barycenter of beacon hot spot is overlapped with the target surface center of supervision camera；After emitting light beam covering relay lens and being directed toward mirror, reflex to
Target；When be directed toward mirror angle change, cause transmitting BEAM SQUINT target, according to be directed toward mirror deflection angle and supervision camera
Barycenter bias between correspondence, correct be directed toward mirror direction angle so that beacon hot spot overlaps again with target surface center,
At this moment transmitting light beam is accurately directed toward target again.
The beneficial effects of the invention are as follows：The present invention by the one-dimensional size of emission system baseline it is (T-shaped baseline long-armed) compression
1/2, from making emission system smaller, more compact structure.The accurate alignment of transmitting laser and target can be achieved, improve imaging letter
Make an uproar than and image quality.
Description of the drawings
Fig. 1 Fourier of the present invention looks in the distance the optics closed loop directing mechanism structure diagram of the U-shaped baseline of art.
Fig. 2 optics closed loop directing mechanism principle schematics of the present invention.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
The equal length of two parallel baselines and three baseline orthogonal with parallel baseline, three form U-shaped baseline knot
Structure.Mirror and relay lens are directed toward if be covered on all baselines, be directed toward mirror and relays the shape of lens array to be U-shaped, which can
It realizes instantaneous imaging, is suitble to motive target imaging.If static target is imaged using three-beam is emitted simultaneously, baseline position
Placement location translation stage, on the sliding block of each translation stage placement one be directed toward mirror or relay lens, realized by rational light path layout
Imaging to static target, the explanation of detailed in Example 1.
Static target is imaged as shown in Figure 1, the U-shaped baseline in the present invention can be realized using while emit three light beams, it is U-shaped
Baseline configuration includes left fixed directing mechanism 1, right fixed directing mechanism 2, horizontal sweep mechanism 3, left vertical sweep mechanism 4 and the right side
Vertical sweep mechanism 5.Left fixed directing mechanism 1 provides fixed direction light beam to obtain target first quartile spectrum value, including referring to
To mirror 1-1 and relay lens 1-2.Mirror 1-1 is directed toward in the surface of relay lens 1-2.Right fixed directing mechanism 2 is acquisition target second
Quadrant spectrum value provides fixed direction light beam, including being directed toward mirror 2-1, relay lens 2-2 and relay lens 2-3.Mirror 2-1 is directed toward to relay
The surface of mirror 2-2, relay lens 2-3 is in the front of relay lens 2-2 and is placed on the sliding block of the translation stage of front and rear orientation.Work as a left side
When fixed directing mechanism 1 works, relay lens 2-3 moves to the position of solid line expression, avoids being in the light；When right fixed directing mechanism 2
During work, relay lens 2-3 moves to the position of dotted line expression, blocks the light beam for being directed toward relay lens 1-2, which is guided into
After mirror 2-2.Horizontal sweep mechanism 3 provides horizontal sweep light beam to obtain the first and second quadrant spectrum values, including being directed toward mirror 3-
1st, relay lens 3-2 and horizontal translation platform 3-3.The surface that mirror 3-1 is located at relay lens 3-2 is directed toward, and the two is each attached to water
On the sliding block of average moving stage 3-3.Left vertical sweep mechanism 4 provides vertical sweep light beam to obtain first quartile spectrum value, including
It is directed toward mirror 4-1, relay lens 4-2, relay lens 4-3 and vertical translation stage 4-4.The front-right that mirror 4-1 is located at relay lens 4-2 is directed toward,
The two is each attached on the sliding block of vertical translation stage 4-4.Relay lens 4-3 is located at the underface of relay lens 4-2, is fixed on vertical flat
The fixing end of moving stage 4-4 lower ends.Right vertical sweep mechanism 5 provides vertical sweep light beam to obtain the second quadrant spectrum value, including
It is directed toward mirror 5-1, relay lens 5-2, relay lens 5-3 and vertical translation stage 5-4.The surface that mirror 5-1 is located at relay lens 5-2 is directed toward,
It is fixed on the sliding block of vertical translation stage 5-4.Relay lens 5-2 is located at the dead astern of relay lens 5-3, is fixed on vertical translation stage 5-
The fixing end of 4 lower ends.Relay lens 5-3 is placed on the sliding block of the translation stage of front and rear orientation.When left vertical sweep mechanism 4 works
When, relay lens 5-3 moves to the position of solid line expression, avoids being in the light；When right vertical sweep mechanism 5 works, relay lens 5-3 fortune
The position of dotted line expression is moved, the light beam for being directed toward relay lens 4-3 is blocked, which is guided to relay lens 5-2.
Optics closed loop light beam directing mechanism
Fig. 2 is the operation principle schematic diagram of optics closed loop light beam directing mechanism.Beacon beam is first carried out before normal work
With the calibration of transmitting laser.The light that beacon light source 6 (natural source or artificial source, positioned at target proximity) is sent, is pointed at 7 part of mirror
It receives, then after the reflection of relay lens 8 and dichronic mirror 9, the target surface of supervision camera 11 is converged to by optical lens 10.It adjusts
The whole angle for being directed toward mirror 7, makes the barycenter of beacon hot spot be overlapped with the target surface center of supervision camera, as shown in fine line in figure.This
When the light beam that sends of lasing light emitter 12 by the transmission of dichronic mirror 9 and relay lens 8, be directed toward the reflection of mirror 7 after, it is accurate to be directed toward target 13,
As shown in heavy line in figure.In normal work, the influence of the factors such as translation and vibration due to being directed toward mirror 7 so that be directed toward mirror 7
Angle change, so as to cause transmitting BEAM SQUINT target.The barycenter bias of beacon hot spot is measured by supervision camera 11, such as
It is empty shown in solid in figure, according to the correspondence between the barycenter bias of the deflection angle and supervision camera 11 of being directed toward mirror 7, correct
It is directed toward the direction angle of mirror 7 so that beacon hot spot overlaps again with target surface center, at this moment emits light beam and is accurately directed toward target again.
It follows that be directed toward mirror 2 forms an optics closed loop with supervision camera 6, it can be corrected and referred to by the barycenter bias of supervision camera 6
To the angle of mirror 7, therefore the light beam directing mechanism is referred to as optics closed loop light beam directing mechanism.
Mirror 7 is directed toward, beacon beam can be not only received, but also transmitting laser can be accurately directed toward target.Generally, mirror 1 is directed toward by optics
Speculum and angle adjusting mechanism two parts composition.The optional speculum of optical mirror, also optional dielectric mirror.Swash for high power
Light application, is preferably selected dielectric mirror, prevents mirror damage.Optical mirror should be respectively provided with beacon beam and transmitting laser very high
Reflectivity, generally>90%, it is therefore desirable to higher than 99%.Angle adjusting mechanism can realize that two-dimentional pitching/orientation angles are adjusted.Angle
Degree of regulation is higher, and the pointing accuracy for emitting laser is higher.Angle of regulation range is bigger, and the direction scope for emitting laser is got over
Greatly.The angular adjustment precision and model of angle adjusting mechanism are generally reasonably selected according to factors such as actual imaging distance and target areas
It encloses.
Relay lens 8 can change beacon beam and emit the direction of laser simultaneously, can select the quantity used according to actual needs.
Relay lens 8 is also to be made of optical mirror and angle adjusting mechanism two parts.Requirement to optical mirror is with being directed toward 7 phase of mirror
Together.Under normal circumstances, due to the angle that relay lens 8 changes light beam be it is fixed, such as 90 °, so angle adjusting mechanism can be adopted
With the fixed fast knot structure of angle, so as to reduce since temperature change or vibration cause the variation of beam deflection angle.
Translation stage can realize vertical translation and realize horizontal translation.Their effect is that will be directed toward required for mirror 7 is moved to
Baseline position.
The main function of dichronic mirror 9 is to make transmitting laser is as more as possible must transmit (or reflection), and beacon beam as far as possible more to be obtained
Reflection (or transmission) improves the utilization rate to beacon beam and transmitting laser.If beacon beam is narrow band light, such as 635nm, and is sent out
Laser is penetrated as 532nm, then dichroic mirror can be used.Dichroic mirror can ensure the transmissivity (or reflectivity) to 635nm>90%, it is right
The reflectivity (or transmissivity) of 532nm>90%.For high power laser light application, dielectric mirror is preferably selected, prevents mirror damage.
Optical lens 10 realizes the convergence to beacon light beam, and smaller hot spot is formed in 11 target surface of supervision camera.It is general next
It says, the focal length of optical lens 10 is longer, higher to the resolution ratio of beacon beam angle change；The aperture of optical lens 10 is bigger, right
The measurement range of beacon beam angle change is bigger.Should rational focal length and aperture scale be selected according to concrete application.
Supervision camera 11 realizes the imaging to beacon hot spot, measurable facula mass center and the bias at target surface center.Monitoring
11 optional detector array of camera, such as CCD camera or CMOS cameras.In general, the Pixel Dimensions of supervision camera 11 are got over
It is small, it is higher to the resolution ratio of beacon beam angle change；The target surface of supervision camera 11 is bigger, to the measurement model of beacon beam angle change
It encloses bigger.Should rational pixel and target surface size be selected according to concrete application.
Claims (3)
- The optics closed loop directing mechanism of the U-shaped baseline of art 1. Fourier looks in the distance, which is characterized in that the mechanism includes：U-shaped baseline mechanism With optics closed loop directing mechanism；Baseline that the U-shaped baseline mechanism is mutually parallel by two and one it is orthogonal with parallel baseline Baseline forms；Optics closed loop directing mechanism includes：Beacon light source, supervision camera and relay lens in U-shaped baseline mechanism, It is directed toward mirror, dichronic mirror and optical lens；Beacon beam is first carried out before normal work and emits the calibration of laser；The light that beacon light source is sent is pointed at mirror part It receives, then after the reflection of relay lens and dichronic mirror, the target surface of supervision camera is converged to by optical lens；Adjustment is directed toward The angle of mirror, makes the barycenter of beacon hot spot be overlapped with the target surface center of supervision camera, and the light beam that at this moment lasing light emitter is sent is through undue Look mirror transmission and relay lens after being directed toward the reflection of mirror, are accurately directed toward target, due to being directed toward the translation of mirror and the shadow of vibration factor It rings so that the angle change of mirror is directed toward, so as to cause transmitting BEAM SQUINT target；The matter of beacon hot spot is measured by supervision camera Heart bias according to the correspondence between the barycenter bias of the deflection angle and supervision camera of being directed toward mirror, is corrected and is directed toward mirror It is directed toward angle so that beacon hot spot overlaps again with target surface center, at this moment emits light beam and is accurately directed toward target again, is directed toward mirror and prison An optics closed loop is formed depending on camera, the angle for being directed toward mirror can be corrected by the barycenter bias of supervision camera.
- The optics closed loop directing mechanism of the U-shaped baseline of art 2. Fourier according to claim 1 looks in the distance, which is characterized in that institute It states the relay lens in U-shaped baseline mechanism and is directed toward mirror and installed for dynamic.
- The optics closed loop directing mechanism of the U-shaped baseline of art 3. Fourier according to claim 1 looks in the distance, which is characterized in that institute It states relay lens and is directed toward mirror and be all made of speculum and angle adjusting mechanism.
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| CN201510620893.4A CN105204012B (en) | 2015-09-25 | 2015-09-25 | Fourier looks in the distance the optics closed loop directing mechanism of the U-shaped baseline of art |
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| CN101441272A (en) * | 2008-12-22 | 2009-05-27 | 中国科学院长春光学精密机械与物理研究所 | Indoor imaging system of Fourier telescope |
| CN103558684A (en) * | 2013-07-18 | 2014-02-05 | 中国科学院国家天文台南京天文光学技术研究所 | Synthetic aperture type high-resolution imaging telescope device based on bright source |
| CN104267406A (en) * | 2014-09-03 | 2015-01-07 | 中国科学院云南天文台 | Diffuse reflection laser ranging and high resolution imaging synchronous measurement photoelectric telescope system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8189095B2 (en) * | 2008-10-30 | 2012-05-29 | The Boeing Company | Method and apparatus for superresolution imaging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101441272A (en) * | 2008-12-22 | 2009-05-27 | 中国科学院长春光学精密机械与物理研究所 | Indoor imaging system of Fourier telescope |
| CN103558684A (en) * | 2013-07-18 | 2014-02-05 | 中国科学院国家天文台南京天文光学技术研究所 | Synthetic aperture type high-resolution imaging telescope device based on bright source |
| CN104267406A (en) * | 2014-09-03 | 2015-01-07 | 中国科学院云南天文台 | Diffuse reflection laser ranging and high resolution imaging synchronous measurement photoelectric telescope system |
Non-Patent Citations (2)
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| Identification Characteristics for Amber and its Imitation;Hui Li et al.;《 Proceedings of 2015 5th International Conference on Information Engineering for Mechanics and Materials(ICIMM 2015)》;20150725;483-488 * |
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