CN106443951A - Atmosphere coherence length instrument automatic focusing device and method - Google Patents
Atmosphere coherence length instrument automatic focusing device and method Download PDFInfo
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- CN106443951A CN106443951A CN201611178904.9A CN201611178904A CN106443951A CN 106443951 A CN106443951 A CN 106443951A CN 201611178904 A CN201611178904 A CN 201611178904A CN 106443951 A CN106443951 A CN 106443951A
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- 238000000034 method Methods 0.000 title claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 10
- 238000003384 imaging method Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses an automatic focusing device for automatic focusing of an atmosphere coherence length instrument. A telescope and a camera are arranged on the atmosphere coherence length instrument correspondingly, light images on a camera target face in the camera through the telescope, and the automatic focusing device is connected with the camera. The automatic focusing device comprises a micro sliding rail, a slider seat and a controller, the slider seat is fixedly connected with the camera and arranged on the micro sliding rail and can drive the camera to move up and down along the micro sliding rail, and the controller is connected with the camera and used for acquiring mass center positions of two light spots of an image on the camera target face and adjusting a distance between the camera and the telescope according to the mass center positions of the light spots. The distance between the camera and the telescope is adjusted by controlling through the controller, and automatic focusing is realized.
Description
Technical field
The present invention relates to optical field, more particularly to atmospheric coherence length instrument automatic focusing device and method.
Background technology
When light transmits in turbulent atmosphere, because refractive index fluctuation leads to light wave front to distort in air, light beam is caused to float
The turbulence effects such as shifting, Beam spreading and light intensity fluctuation, during description turbulence effect, widely used parameter is atmospheric coherence length,
Atmospheric coherence length describes the comprehensive turbulence intensity in transmission path, is for Laser Atmospheric Transmission and adaptive optics research
Important Parameters.
The metering system of atmospheric coherence length instrument：Light beam receives through telescope, focuses on camera target surface, through camera number
After collection and processing system, obtain two hot spots of barycenter random fluctuation, by two light in the image of the certain frame number of calculating
The fluctuating variance of speckle barycenter spacing obtains atmospheric coherence length.
During measurement atmospheric coherence length, tested beacon beam is change with the distance of telescope, with the change of distance, is
Realize beacon beam in focal plane imaging, need to adjust the distance between receiving telescope and camera, by light focusing in camera
On focal plane；Receiving telescope and other optical systems, are affected by day and night temperature, produce phenomenon of expanding with heat and contract with cold, can produce
Out of focus, is at this moment also required to finely tune the spacing of receiving telescope and camera, thus beacon beam is focused on the focal plane of camera.
Focal length adjustment device in atmospheric coherence length instrument of the prior art be all mode manually realize so that
Equipment does not enable automatic focusing.
Content of the invention
It is an object of the invention to provide being capable of atmospheric coherence length instrument automatic focusing device and the method for automatic focusing.
For achieving the above object, the invention provides following scheme：
The automatic focusing device of atmospheric coherence length instrument automatic focusing of the present invention, atmospheric coherence length instrument is correspondingly arranged prestige
Remote mirror and camera, light is imaged on described magazine camera target surface by described telescope, described automatic focusing device and
Camera connects；Wherein, described automatic focusing device includes：Micro slide rail, take-up housing, motor, controller；
Described take-up housing is fixedly connected with described camera, and described take-up housing is arranged on described micro slide rail, can carry
Move described camera to move up and down along described micro slide rail；
Described motor is connected with described take-up housing, for driving described take-up housing to move up and down along described micro slide rail.
Described controller respectively with described camera and described motor connection, for obtaining image on described camera target surface
The centroid position of two hot spots, and drive described motor to adjust described take-up housing in institute according to the centroid position of described two hot spots
State the shift position on micro slide rail, to change the spacing of described camera and described telescope.
Optionally, described automatic focusing device also includes：Base, miniature displacement transducer；
Described base is arranged at described telescope light-emitting window, and is provided with described micro slide rail on described base；
The fixing end of described miniature displacement transducer is arranged on described base, the sliding end of described miniature displacement transducer
It is connected with described take-up housing, described miniature displacement transducer is connected with described controller, for detecting described take-up housing described
Present position values on micro slide rail, and send to described controller；
Described controller is additionally operable to be respectively compared present position values on described micro slide rail for the described take-up housing and setting
Upper limit place value and set lower limit place value size, and according to comparative result adjust described take-up housing on described micro slide rail
Shift position.
Optionally, described automatic focusing device also includes：Illuminator, illuminator mounting and adjusting pedestal；
Described illuminator is arranged on described illuminator mounting and adjusting pedestal, for importing to the emergent light of described telescope
In described camera；
Described illuminator mounting and adjusting pedestal is arranged on described base.
Optionally, described automatic focusing device also includes：Camera mounting seat, described camera is arranged on described camera mounting seat
On, described camera mounting seat is connected with described take-up housing.
Atmospheric coherence length instrument, described atmospheric coherence length instrument is correspondingly arranged telescope and camera, and light passes through described
Telescope is imaged on described magazine camera target surface；
Be additionally provided with described atmospheric coherence length instrument according to atmospheric coherence length instrument automatic focusing described above from
Dynamic focussing mechanism；Described automatic focusing device is connected with described camera.
The specific embodiment being provided according to the present invention, the invention discloses following technique effect：Atmospheric coherence length instrument is certainly
The automatic focusing device of dynamic focusing is fixed on take-up housing by arranging described camera, controls described take-up housing to exist by controller
Moving on described micro slide rail it is achieved that automatically adjusting the distance of camera and telescope, having reached the effect of automatic focusing.
For achieving the above object, the invention provides following scheme：
The automatic focusing method of atmospheric coherence length instrument automatic focusing of the present invention, described automatic focusing method is using according to upper
State the described automatic focusing device of atmospheric coherence length instrument automatic focusing or the atmospheric coherence length according to claim
Instrument, described automatic focusing method includes：
Step one：During control slide block seat is mobile on described micro slide rail, obtain imaging on camera target surface
The centroid position of two hot spots；
Step 2：Centroid position according to two hot spots of imaging on camera target surface calculates the barycenter of described two hot spots
Spacing；
Step 3：The spacing of described barycenter is made, with spacing set in advance, the absolute value that difference obtains difference；
Step 4：Whether the absolute value judging described difference is less than setting return difference；If it is, controlling described take-up housing edge
Described micro slide rail not move；Otherwise execution step five；
Step 5：Judge whether the spacing of described barycenter is more than the spacing of described setting；If it is, controller is just placed in
To focus state, execution step six；Otherwise, controller is placed in reverse focus state, execution step seven；
Step 6：Control described take-up housing along the positive focusing of described micro slide rail, execution step one；
Step 7：Described take-up housing is controlled reversely to focus along described micro slide rail, execution step one.
The specific embodiment being provided according to the present invention, the invention discloses following technique effect：Become according on camera target surface
The centroid position of two hot spots of picture calculates the spacing of the barycenter of described two hot spots；By the spacing of described barycenter with preset
Spacing make difference and obtain the absolute value of difference；It is compared to control described take-up housing edge with setting return difference by described absolute value
The situation that described micro slide rail moves up and down it is achieved that the effect of automatic focusing.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Need use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only the present invention some enforcement
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the explosive view of the automatic focusing device of atmospheric coherence length instrument of the present invention；
Fig. 2 is the front view of the automatic focusing device of atmospheric coherence length instrument of the present invention；
Fig. 3 is the side view of the automatic focusing device of atmospheric coherence length instrument of the present invention；
Fig. 4 is the atmospheric coherence length instrument with automatic focusing device；
Fig. 5 is the flow chart of the automatic focusing method of atmospheric coherence length instrument of the present invention；
Fig. 6 is the simplification index path of atmospheric coherence length instrument.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
It is an object of the invention to provide atmospheric coherence length instrument automatic focusing device and automatic focusing method.
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings and specifically real
The present invention is further detailed explanation to apply mode.
Atmospheric coherence length instrument includes telescope 11, automatic focusing device 12, frame 14, controller 13.Described controller
14 are installed in described frame 14.The automatic focusing device 12 of atmospheric coherence length instrument automatic focusing, on atmospheric coherence length instrument
It is correspondingly arranged telescope 11 and camera 8, light is imaged on the camera target surface in described camera 8 by described telescope 11, institute
State automatic focusing device 12 to be connected with camera 8；As shown in figure 1, described automatic focusing device 12 includes：Micro slide rail 2, take-up housing
3, controller 13；Described take-up housing 3 is fixedly connected with described camera 8, and described take-up housing 3 is arranged on described micro slide rail 2,
And described camera 8 can be driven to move up and down along described micro slide rail 2；Described controller 13 respectively with described camera 8 and institute
State motor 7 to connect, for obtaining the centroid position of two hot spots of the image on described camera 8 target surface, and according to described two
The centroid position adjustment sliding position on described micro slide rail 2 for the described take-up housing 3 of hot spot, to change described camera 8 and institute
State the spacing of telescope 11.
In the present embodiment, the installed surface of described take-up housing 3 is processed gathering sill, the width of gathering sill and described miniature cunning
The slide block width of rail 2 the same it is ensured that inclination will not be produced in installation process.
Described camera 8 is the measurement detection part of atmospheric coherence length, provides focal length position for automatic focusing device 12 simultaneously
The feedback put.
Described automatic focusing device 12 also includes：Base 1, miniature displacement transducer 6；Described base 1 is arranged on described prestige
At remote mirror 11 light-emitting window, and described micro slide rail 2 is provided with described base 1；The fixing end of described miniature displacement transducer 6 sets
Put on described base 1, the sliding end of described miniature displacement transducer 6 is connected with described take-up housing 3, described miniature displacement sensing
Device is connected with described controller 13, for detecting current displacement on described micro slide rail 2 for the described take-up housing 3, and send to
Described controller 13 is it is achieved that the position of positioning action is fed back.
Described controller 13 is additionally operable to be respectively compared the value of current displacement on described micro slide rail 2 for the described take-up housing 3
With set upper limit place value and set lower limit place value size, and according to comparative result adjustment described take-up housing 3 described micro-
Shift position on type slide rail 2, is used for preventing described take-up housing 3 from departing from described micro slide rail 2 it is achieved that software limit function.
Described automatic focusing device 12 also includes：Illuminator 9, illuminator mounting and adjusting pedestal 10；In the present embodiment, described
Illuminator 9 is 45 ° of illuminators.
Described illuminator 9 is arranged on described illuminator mounting and adjusting pedestal 10, and described illuminator mounting and adjusting pedestal 10 is arranged
There is the guiding mechanism of bidimensional, for adjusting the angle of described illuminator 9, for the emergent light of described telescope 9 is imported to institute
State in camera 8；Described illuminator mounting and adjusting pedestal 10 is arranged on described base 1.
Described automatic focusing device 12 also includes：Motor 7, described motor 7 is connected with described take-up housing 3, for driving
State take-up housing 3 to move up and down along described micro slide rail 2, in the present embodiment, described motor 7 is linear stepping motor.
Upper limit position block 51, lower position block 52, described upper limit position block 51 and lower position block are provided with the leading screw of described motor 7
52 are used for limiting the motion interval of leading screw, prevent motor 7 from dropping.
Described automatic focusing device 12 also includes：Camera mounting blocks 4, described camera 8 is fixed on described camera mounting blocks 4
On, need to be closely connected it is ensured that camera 8 inclining in vertical direction between described camera mounting blocks 4 and described take-up housing 3
Tiltedly as far as possible little；Described camera mounting blocks 4 are the transition member between described camera 8 and described take-up housing 3, camera 8 for convenience
Dismounting and maintenance.
The present invention also provides atmospheric coherence length instrument, and described atmospheric coherence length instrument is provided with above-mentioned automatic focusing device
12, and it is correspondingly arranged telescope 11 and camera 8, light is become on the camera target surface in described camera 8 by described telescope 11
Picture；Described automatic focusing device 12 is connected with camera 8.
As shown in figure 4, when installing automatic focusing device 12 on atmospheric coherence length instrument, described automatic focusing device 12 is pacified
It is contained in receiving telescope 11 light-emitting window of atmospheric coherence length instrument, in order to the uniqueness in the direction that ensures to focus is it is ensured that focussing mechanism
The ultimate range of installation site and imaging focal plane can not be more than L, the occurrence of L by the focal length of described telescope 11, bore,
The angle of wedge of wedge mirror 14 determines.
The automatic focusing method of atmospheric coherence length instrument automatic focusing, described automatic focusing method is using according to above-mentioned automatic
Focussing mechanism 12, described automatic focusing method includes：
Step 100：The matter of two hot spots of imaging on camera target surface, during moving, is obtained on described micro slide rail
Heart position；
Step 200：Centroid position according to two hot spots of imaging on camera target surface calculates the barycenter of described two hot spots
Spacing；
Step 300：The spacing of described barycenter is made, with spacing set in advance, the absolute value that difference obtains difference；
Step 400：Whether the absolute value judging described difference is less than setting return difference；
Step 401：If it is, controlling described take-up housing not move along described micro slide rail；Otherwise execution step
500；
Step 500：Judge whether the spacing of described barycenter is more than the spacing of described setting；
Step 501：If it is, controller is placed in positive focus state, execution step 600；
Step 502：Otherwise, controller is placed in reverse focus state, execution step:700；
Step 600：Control described take-up housing along the positive focusing of described micro slide rail, execution step 100；
Step 700：Described take-up housing is controlled reversely to focus along described micro slide rail, execution step 100.
In the present embodiment, as shown in fig. 6, D0 is the centroid distance of two picture points on focal plane, D1 is two behind focal plane
The centroid distance of individual picture point, D2 is the centroid distance of focal plane the first two picture point.
Centroid distance D0 by the centroid distance D1 of latter two picture point of described focal plane and two picture points on described focal plane
Make the absolute value that difference obtains difference；Whether the absolute value judging described difference is less than setting return difference；If it is, controlling described cunning
Block 3 does not move along described micro slide rail 2；Otherwise control described take-up housing 3 to move up and down along described micro slide rail 2, subtract
The distance between little camera 8 and telescope 11.
Centroid distance D0 by the centroid distance D2 of described focal plane the first two picture point and two picture points on described focal plane
Make the absolute value that difference obtains difference；Whether the absolute value judging described difference is less than setting return difference；If it is, controlling described cunning
Block 3 does not move along described micro slide rail 2；Otherwise control described take-up housing 3 to move up and down along described micro slide rail 2, increase
The distance between big camera 8 and telescope 11.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to the principle of the present invention and embodiment, the saying of above example
Bright it is only intended to help and understands the method for the present invention and its core concept；Simultaneously for one of ordinary skill in the art, foundation
The thought of the present invention, all will change in specific embodiments and applications.In sum, this specification content is not
It is interpreted as limitation of the present invention.
Claims (6)
1. the automatic focusing device of atmospheric coherence length instrument automatic focusing is it is characterised in that corresponding on atmospheric coherence length instrument set
Put telescope and camera, light is imaged on described magazine camera target surface by described telescope, described automatic focusing dress
Put and be connected with camera；Wherein, described automatic focusing device includes：Micro slide rail, take-up housing, motor, controller；
Described take-up housing is fixedly connected with described camera, and described take-up housing is arranged on described micro slide rail, can drive institute
State camera to move up and down along described micro slide rail；
Described motor is connected with described take-up housing, for driving described take-up housing to move up and down along described micro slide rail.Described
Controller respectively with described camera and described motor connection, for obtaining the matter of two hot spots of the image on described camera target surface
Heart position, and drive described motor to adjust described take-up housing on described micro slide rail according to the centroid position of described two hot spots
Shift position, to change the spacing of described camera and described telescope.
2. the automatic focusing device of atmospheric coherence length instrument automatic focusing according to claim 1 is it is characterised in that described
Automatic focusing device also includes：Base, miniature displacement transducer；
Described base is arranged at described telescope light-emitting window, and is provided with described micro slide rail on described base；
The fixing end of described miniature displacement transducer is arranged on described base, the sliding end of described miniature displacement transducer and institute
State take-up housing to connect, described miniature displacement transducer is connected with described controller, for detecting described take-up housing described miniature
Present position values on slide rail, and send to described controller；
It is upper with set that described controller is additionally operable to be respectively compared present position values on described micro slide rail for the described take-up housing
Spacing value and the size of the lower limit place value setting, and shifting on described micro slide rail for the described take-up housing is adjusted according to comparative result
Dynamic position.
3. the automatic focusing device of atmospheric coherence length instrument automatic focusing according to claim 2 is it is characterised in that described
Automatic focusing device also includes：Illuminator, illuminator mounting and adjusting pedestal；
Described illuminator is arranged on described illuminator mounting and adjusting pedestal, described for importing to the emergent light of described telescope
In camera；
Described illuminator mounting and adjusting pedestal is arranged on described base.
4. the automatic focusing device of atmospheric coherence length instrument automatic focusing according to claim 1 is it is characterised in that described
Automatic focusing device also includes：Camera mounting seat, described camera is arranged in described camera mounting seat, described camera mounting seat with
Described take-up housing connects.
5. atmospheric coherence length instrument is it is characterised in that be correspondingly arranged telescope and camera, light on described atmospheric coherence length instrument
It is imaged on described magazine camera target surface by described telescope；
Be additionally provided with described atmospheric coherence length instrument atmospheric coherence length instrument according to any one of claim 1-4 from
The automatic focusing device of dynamic focusing；Described automatic focusing device is connected with described camera.
6. the automatic focusing method of atmospheric coherence length instrument automatic focusing is it is characterised in that described automatic focusing method uses root
According to the automatic focusing device of the atmospheric coherence length instrument automatic focusing any one of claim 1-4 or according to claim
Atmospheric coherence length instrument described in 5, described automatic focusing method includes：
Step one：During take-up housing is mobile on described micro slide rail, described controller obtains imaging on camera target surface
The centroid position of two hot spots；
Step 2：Centroid position according to two hot spots of imaging on camera target surface calculates between the barycenter of described two hot spots
Away from；
Step 3：The spacing of described barycenter is made, with spacing set in advance, the absolute value that difference obtains difference；
Step 4：Whether the absolute value judging described difference is less than setting return difference；If it is, described take-up housing is not along described
Micro slide rail moves；Otherwise execution step five；
Step 5：Judge whether the spacing of described barycenter is more than the spacing of described setting；If it is, controller is placed in positive tune
Coke-like state, execution step six；Otherwise, controller is placed in reverse focus state, execution step seven；
Step 6：Control described take-up housing along the positive focusing of described micro slide rail, execution step one；
Step 7：Described take-up housing is controlled reversely to focus along described micro slide rail, execution step one.
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| CN109270030A (en) * | 2018-08-01 | 2019-01-25 | 西安理工大学 | A method of utilizing the result inverting Refractive-index-structure parameter of measurement atmospheric coherence length |
| CN110231097A (en) * | 2019-07-11 | 2019-09-13 | 中国科学院合肥物质科学研究院 | A kind of round-the-clock atmospheric coherence length measuring system and method |
| CN110346046A (en) * | 2019-07-15 | 2019-10-18 | 中国科学院合肥物质科学研究院 | A kind of stellar radiation meter automatic focusing method and radiometer system round the clock |
| CN110346046B (en) * | 2019-07-15 | 2020-11-06 | 中国科学院合肥物质科学研究院 | Day and night star radiometer automatic focusing method and radiometer system |
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