CN109683312A - A kind of adjusting method of adaptive optics system Image relaying relationship - Google Patents
A kind of adjusting method of adaptive optics system Image relaying relationship Download PDFInfo
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- CN109683312A CN109683312A CN201910056518.XA CN201910056518A CN109683312A CN 109683312 A CN109683312 A CN 109683312A CN 201910056518 A CN201910056518 A CN 201910056518A CN 109683312 A CN109683312 A CN 109683312A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/18—Function characteristic adaptive optics, e.g. wavefront correction
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Abstract
The present invention relates to a kind of adjusting methods of adaptive optics system Image relaying relationship, belong to adaptive optical technique field, specific adjusting method are as follows: when deformation mirror driver no applied voltage, beam intensity figure before pressing is obtained using ccd sensor, it selects several deformation mirror drivers and applies voltage respectively, beam intensity figure after being pressed using ccd sensor, beam intensity figure and beam intensity figure after pressure before comparison presses, judge stringent Image relaying relationship whether is established between distorting lens and ccd sensor, then distorting lens image planes position is calibrated and then accurately adjusting the position of ccd sensor, guarantee to establish stringent Image relaying relationship between distorting lens and Wavefront sensor in adaptive optics system, to improve the accuracy of adaptive optics system wavefront measurement and correction.
Description
Technical field
The invention belongs to adaptive optical technique fields, relate in particular to a kind of adaptive optics system Image relaying relationship
Adjusting method.
Background technique
Wavefront distortion has seriously affected laser beam quality, and in order to eliminate wavefront distortion, adaptive optical technique is extensive
Using (one, Adaptive optics-a progress review, " Proc.SPIE ", Vol.1542,1991,2-17. bis-,
Modeling and control of a deformable mirror,《Journal of Dynamic Systems,
Measurement,and Control",Vol.124,2002,297-302.).Adaptive optics system is a kind of real-time detection
With the system of correction random optical wave front aberration, it is mainly by Wavefront sensor (Hartmann wave front sensor or curvature sensing
Device etc.), the part such as wave-front corrector (tilting mirror, distorting lens etc.) and wavefront controller forms.By Wavefront sensor real-time detection
Aberration wavefront information, and wavefront school is converted by control algolithm by the signal that Wavefront sensor detects by wavefront controller
The voltage control signal of each driver of positive device, voltage control signal drives wave-front corrector to change mirror shape, to realize
The real time correction of wavefront error.For the wavefront correction effect obtained, distorting lens and wavefront sensing in adaptive optics system
Need to establish between device stringent Image relaying relationship (one, Adaptive optics at the PHELIX laser,
" Proc.SPIE ", Vol.6584,2007,658402. bis-, Deformable mirror based on piezoelectric
actuators for the adaptive system of the Iskra-6 facility,《Quantum
Electronics ", Vol.37,2007,691-696.), how Image relaying relationship in high-precision adjusting adaptive optics system
The problem of being urgent need to resolve.
Summary of the invention
For various deficiencies of the prior art, to solve the above-mentioned problems, it is proposed that a kind of adaptive optics system picture biography
The adjusting method of relationship is passed, to improve the accuracy of adaptive optics system wavefront measurement and correction.
To achieve the above object, the invention provides the following technical scheme:
A kind of adjusting method of adaptive optics system Image relaying relationship, comprising the following steps:
S1: the position of each optical element in adjustment optical system guarantees that incident beam reflexes to CCD sensing through distorting lens
Device；
S2: when deformation mirror driver no applied voltage, the beam intensity of distorting lens image planes position is obtained using ccd sensor
Scheme and is defined as beam intensity figure before pressing；
S3: several deformation mirror drivers are selected and apply voltage respectively, after obtaining several pressures using ccd sensor
The beam intensity figure of distorting lens image planes position, and it is defined as beam intensity figure after pressure；
S4: beam intensity figure is compared with beam intensity figure after several pressures respectively before pressing, if beam intensity
Distribution does not change, then it is assumed that stringent Image relaying relationship, adjustment process knot are established between distorting lens and ccd sensor
Beam, it is on the contrary, then it is assumed that not set up stringent Image relaying relationship between distorting lens and ccd sensor and execute S5；
S5: ccd sensor being moved along its optical axis, repeats S2 to S4, until building between distorting lens and ccd sensor
Stringent Image relaying relationship is found.
Further, the optical system includes spectroscope, reflective mirror, ccd sensor, distorting lens and controller, and described point
Light microscopic is obliquely installed, and spectroscope and distorting lens are arranged with optical axis, and incident beam is transmitted through distorting lens after spectroscope, through deforming
The incident beam that mirror is reflected back is divided into sample beam and outgoing beam after spectroscope, and the reflective mirror and ccd sensor are shared the same light
Axis setting, and reflective mirror is correspondingly arranged with spectroscope, sample beam is successively incident to reflective mirror and ccd sensor, the control
Device is electrically connected with ccd sensor, distorting lens respectively.
Further, the angle of the spectroscope, reflective mirror and horizontal plane is 45 °.
Further, shrink beam component is additionally provided between the reflective mirror and ccd sensor, the shrink beam component includes confocal point
The first lens and the second lens, and the optical axis coincidence of the optical axis of shrink beam component and ccd sensor.
Further, it is coated with Anti-reflective coating on the reflective mirror, is coated with anti-reflection film on first lens and the second lens.
Further, in the step S3, the number that alive deformation mirror driver is applied in selection is no less than 3.
Further, in the step S4, after several pressures in beam intensity figure at least one and press before light beam
When intensity map comparison changes, then it is assumed that do not set up stringent Image relaying relationship between distorting lens and ccd sensor.
The beneficial effects of the present invention are:
Beam intensity figure judges to deform by comparison after obtaining beam intensity figure before pressing using ccd sensor and pressing
Stringent Image relaying relationship whether is established between mirror and ccd sensor, then by accurately adjust ccd sensor position into
And distorting lens image planes position is calibrated, guarantee that establishing stringent picture in adaptive optics system between distorting lens and Wavefront sensor passes
Relationship is passed, to improve the accuracy of adaptive optics system wavefront measurement and correction.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of optical system in the present invention；
Fig. 2 be ccd sensor position adjust before pressure before beam intensity figure；
Fig. 3 be ccd sensor position adjust before pressure after beam intensity figure；
Fig. 4 be ccd sensor position adjust after pressure before beam intensity figure；
Fig. 5 be ccd sensor position adjust after pressure after beam intensity figure.
In attached drawing: 1- incident beam, 2- spectroscope, 3- distorting lens, 4- reflective mirror, the first lens of 5-, the second lens of 6-, 7-
Ccd sensor, 8- controller, 9- outgoing beam.
Specific embodiment
It is right below with reference to attached drawing of the invention in order to make those skilled in the art more fully understand technical solution of the present invention
Technical solution of the present invention carries out clear, complete description, and based on the embodiment in the application, those of ordinary skill in the art exist
Other similar embodiments obtained under the premise of creative work are not made, shall fall within the protection scope of the present application.
In addition, the direction word mentioned in following embodiment, such as "upper" "lower" " left side " " right side " etc. are only the directions with reference to attached drawing, because
This, the direction word used is for illustrative and not limiting the invention.
Embodiment one:
A kind of adjusting method of adaptive optics system Image relaying relationship, comprising the following steps:
S1: the position of each optical element in adjustment optical system guarantees that incident beam reflexes to CCD sensing through distorting lens
Device.
Specifically, as shown in Figure 1, the optical system includes spectroscope 2, reflective mirror 4, ccd sensor 7,3 and of distorting lens
Controller 8, the spectroscope 2 are obliquely installed, and spectroscope 2 and distorting lens 3 are arranged with optical axis, and incident beam 1 is after spectroscope 2
It is transmitted through distorting lens 3, the incident beam being reflected back through distorting lens 3 is divided into sample beam and outgoing beam 9, institute after spectroscope 2
It states reflective mirror 4 and ccd sensor 7 to be arranged with optical axis, and reflective mirror 4 is correspondingly arranged with spectroscope 2, sample beam is successively incident to
Reflective mirror 4 and ccd sensor 7, the controller 8 are electrically connected with ccd sensor 7, distorting lens 3 respectively.It is described in the present embodiment
The angle of spectroscope 2, reflective mirror 4 and horizontal plane is 45 °.Meanwhile contracting is additionally provided between the reflective mirror 4 and ccd sensor 7
Tread assembly, the shrink beam component includes confocal first lens 5 and the second lens 6, and the optical axis of shrink beam component and CCD are sensed
The optical axis coincidence of device 7.It is coated with Anti-reflective coating on the reflective mirror 4, is coated with anti-reflection film on first lens 5 and the second lens 6.
S2: when deformation mirror driver no applied voltage, the light beam for obtaining distorting lens image planes position using ccd sensor 7 is strong
Degree figure is simultaneously defined as beam intensity figure before pressing.
S3: selecting several deformation mirror drivers and apply voltage respectively, obtains several pressures using ccd sensor 7
The beam intensity figure of distorting lens image planes position afterwards, and it is defined as beam intensity figure after pressure, that is to say, that beam intensity after pressure
The number of figure is equal with the deformation mirror driver number of selection.Preferably, of alive deformation mirror driver is applied in selection
Number no less than 3, i.e., at least obtain beam intensity figure after 3 pressures.
S4: beam intensity figure is compared with beam intensity figure after several pressures respectively before pressing, when several are applied
When beam intensity after pressure in beam intensity figure does not change, then it is assumed that built between distorting lens 3 and ccd sensor 7
Stringent Image relaying relationship is found, adjustment process terminates；After several pressures in beam intensity figure at least one and pressure
When preceding beam intensity figure comparison changes, then it is assumed that do not set up stringent Image relaying between distorting lens 3 and ccd sensor 7 and close
System, at this point, executing S5.
S5: ccd sensor 7 is moved forward and backward along its optical axis, S2 to S4 is repeated, until distorting lens 3 and ccd sensor
Stringent Image relaying relationship is established between 7.
Deformation mirror driver apply voltage change incident beam the wavefront information of distorting lens object plane and and have not been changed strong
Information is spent, then incident beam is imaged on ccd sensor.If there are stringent Image relayings between distorting lens and ccd sensor
Relationship, then deformation mirror driver, which applies the beam intensity that voltage front and back ccd sensor measures, to change.If
Stringent Image relaying relationship is not present between distorting lens and ccd sensor, then beam intensity can be due to distorting lens upper ripple
Corresponding variation occurs for the variation of preceding information.Therefore, beam intensity figure and beam intensity figure after pressure, sentence before being pressed by comparison
Stringent Image relaying relationship whether is established between disconnected distorting lens and ccd sensor, then by accurately adjusting ccd sensor
Position and then calibration distorting lens image planes position guarantee to establish between distorting lens and Wavefront sensor in adaptive optics system stringent
Image relaying relationship.
Embodiment two:
The part that the present embodiment is the same as example 1 repeats no more, unlike:
In the present embodiment, the parameter difference of each optical element is as follows:
The bore of incident beam is 50 × 50mm, wavelength 1053nm；Spectroscopical bore is 100 × 100mm, and 45 ° put
It sets, is 1% to 1053nm laser reflectivity；The parameter of distorting lens is as shown in table 1；The bore of reflective mirror be 100 × 100mm, 45 °
It places, is 99.95% to 1053nm laser reflectivity；The bore of first lens is 100 × 100mm, focal length 500mm；Second
The bore of lens is 15 × 15mm, focal length 40mm；The parameter of ccd sensor is as shown in table 2；The bore of outgoing beam be 50 ×
50mm, wavelength 1053nm.
Table 1: distorting lens important technological parameters
| Technical indicator title | Technical parameter |
| Effective aperture | 50mm×50mm |
| Driver stroke | 10μm |
| Driver number and layout | 6 × 6 squares |
| Minimum Closed bandwidth | 1Hz |
| Surface reflectivity | >=99.95%@1053nm |
Table 2:CCD sensor important technological parameters
Specific adjustment process is as follows:
1, the strength information of ccd sensor measurement distorting lens image planes position, beam intensity figure before being pressed, such as Fig. 2 institute
Show.
2,4 drivers for randomly choosing distorting lens apply voltage, beam intensity figure after 4 pressures are obtained, such as Fig. 3 institute
Show.Beam intensity has significant change after Fig. 3 and Fig. 2 comparison discovery deformation mirror driver is applied voltage, illustrates distorting lens
Stringent Image relaying relationship is not set up between ccd sensor.
3, the front-rear position that ccd sensor is adjusted along the optical axis direction of ccd sensor, iterates, until after pressure
Beam intensity does not change in beam intensity figure, that is to say, that by adjusting the position of ccd sensor, guarantees deformation
Accurate and stringent Image relaying relationship is established between mirror and ccd sensor.At this point, beam intensity figure is as shown in figure 4, apply before pressing
Beam intensity figure after pressure is as shown in figure 5, discovery deformation mirror driver applies beam intensity after voltage after Fig. 4 and Fig. 5 comparison
It does not change, illustrates to establish accurate and stringent Image relaying relationship between distorting lens and ccd sensor.
The above has been described in detail, described above, is only a preferred embodiment of the present invention, when cannot
It limit the scope of implementation of the present invention, i.e., it is all according to the made equivalent changes and modifications of the application range, it should still belong to covering scope of the present invention
It is interior.
Claims (7)
1. a kind of adjusting method of adaptive optics system Image relaying relationship, which comprises the following steps:
S1: the position of each optical element in adjustment optical system guarantees that incident beam reflexes to ccd sensor through distorting lens；
S2: when deformation mirror driver no applied voltage, the beam intensity figure of distorting lens image planes position is obtained simultaneously using ccd sensor
It is defined as beam intensity figure before pressing；
S3: several deformation mirror drivers are selected and apply voltage respectively, are deformed after obtaining several pressures using ccd sensor
The beam intensity figure of mirror image face position, and it is defined as beam intensity figure after pressure；
S4: beam intensity figure is compared with beam intensity figure after several pressures respectively before pressing, if beam intensity
It does not change, then it is assumed that stringent Image relaying relationship is established between distorting lens and ccd sensor, adjustment process terminates,
It is on the contrary, then it is assumed that not set up stringent Image relaying relationship between distorting lens and ccd sensor and execute S5；
S5: ccd sensor being moved along its optical axis, repeats S2 to S4, until establishing between distorting lens and ccd sensor
Stringent Image relaying relationship.
2. adjusting method according to claim 1, which is characterized in that the optical system include spectroscope, reflective mirror,
Ccd sensor, distorting lens and controller, the spectroscope are obliquely installed, and spectroscope and distorting lens are arranged with optical axis, incident light
Beam is transmitted through distorting lens after spectroscope, and the incident beam being reflected back through distorting lens is divided into sample beam and outgoing after spectroscope
Light beam, the reflective mirror and ccd sensor are arranged with optical axis, and reflective mirror is correspondingly arranged with spectroscope, and sample beam successively enters
It is incident upon reflective mirror and ccd sensor, the controller is electrically connected with ccd sensor, distorting lens respectively.
3. adjusting method according to claim 2, which is characterized in that the angle of the spectroscope, reflective mirror and horizontal plane
It is 45 °.
4. adjusting method according to claim 2, which is characterized in that be additionally provided between the reflective mirror and ccd sensor
Shrink beam component, the shrink beam component includes confocal first lens and the second lens, and the optical axis of shrink beam component and CCD are sensed
The optical axis coincidence of device.
5. adjusting method according to claim 4, which is characterized in that it is coated with Anti-reflective coating on the reflective mirror, described first
Anti-reflection film is coated on lens and the second lens.
6. according to adjusting method as claimed in claim 3 to 5, which is characterized in that in the step S3, selection applies voltage
The number of deformation mirror driver be no less than 3.
7. adjusting method according to claim 6, which is characterized in that in the step S4, light beam after several pressures
At least one and beam intensity figure comparison when changing before pressing in intensity map, then it is assumed that distorting lens and ccd sensor it
Between do not set up stringent Image relaying relationship.
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| CN110579873A (en) * | 2019-09-06 | 2019-12-17 | 中国人民解放军国防科技大学 | array beam wavefront correction system and method based on integrated corrector |
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