CN114460739B - All-optical-path static aberration correction method in space optical communication miniaturized terminal - Google Patents

All-optical-path static aberration correction method in space optical communication miniaturized terminal Download PDF

Info

Publication number
CN114460739B
CN114460739B CN202210055109.XA CN202210055109A CN114460739B CN 114460739 B CN114460739 B CN 114460739B CN 202210055109 A CN202210055109 A CN 202210055109A CN 114460739 B CN114460739 B CN 114460739B
Authority
CN
China
Prior art keywords
delta
path
light
deformable mirror
light path
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.)
Active
Application number
CN202210055109.XA
Other languages
Chinese (zh)
Other versions
CN114460739A (en
Inventor
于思源
杨兴昊
徐翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Institute of Technology
Zhejiang Lab
Original Assignee
Harbin Institute of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN202210055109.XA priority Critical patent/CN114460739B/en
Publication of CN114460739A publication Critical patent/CN114460739A/en
Application granted granted Critical
Publication of CN114460739B publication Critical patent/CN114460739B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/04—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors for the purpose of beam splitting or combining, e.g. fitted with eyepieces for more than one observer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Communication System (AREA)

Abstract

A method for correcting all-optical-path static aberration in a miniaturized terminal for space optical communication relates to the technical field of communication terminals and aims at solving the problems that the common-path and non-common-path static aberrations in space optical communication can cause obvious reduction of correction capability of a deformable mirror, increase of communication error rate, poor tracking effect and poor quality of emission signals and beacon beams The quality of the transmitted signal and the beacon beam is poor.

Description

All-optical-path static aberration correction method in space optical communication miniaturized terminal
Technical Field
The invention relates to the technical field of communication terminals, in particular to a method for correcting static aberration of an all optical path in a miniaturized terminal for space optical communication.
Background
In a space optical communication terminal on the same optical path for receiving and transmitting, the wave front aberration of the transmitting and receiving signal and the beacon light is corrected by using adaptive optics. The wavefront detection optical path only plays a role of detecting wavefront aberration and can calibrate the initial aberration of the wavefront detection optical path, so that the communication terminal has a lower requirement on the aberration of the wavefront detection optical path, and has a relatively higher requirement on the aberration of other optical paths. However, in a wavefront detection optical path, a conventional adaptive optical system detects wavefront aberration through a shack-hartmann wavefront detector (SH-WFS), so as to control a Deformable Mirror (DM) to generate a specific surface type to compensate the aberration, which only ensures that the image quality of a signal received by the wavefront detection optical path is good, and cannot ensure that the aberrations of other non-common optical paths are also corrected, which may have adverse effects on communication, tracking, and the beam quality of signal light and beacon light. Meanwhile, the optical path of the whole system may have large static aberration, which can be measured in a laboratory, but during the operation of the communication terminal, there are special situations such as temperature change and dust adhesion, and the static aberration will change. This can cause adverse effects such as a significant reduction in the correction capability of the deformable mirror, an increase in the communication error rate, poor tracking effect, poor quality of the transmitted signal and beacon beam, and the like.
Disclosure of Invention
The purpose of the invention is: aiming at the problems that the common-path and non-common-path static aberration in space optical communication can cause the correction capability of a deformable mirror to be obviously reduced, the communication error rate is increased, the tracking effect is poor, and the quality of a transmitting signal and a beacon light beam is poor, the method for correcting the total-path static aberration in the space optical communication miniaturized terminal is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for correcting all-optical-path static aberration in a space optical communication miniaturized terminal comprises the following steps:
the method comprises the following steps: constructing an all-optical-path module, wherein an all-optical-path system comprises five optical paths:
a first optical path: the incident light sequentially passes through the telescope, the tracking and aiming system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror is contracted after passing through the first beam splitter, and the contracted light enters the summer-Hartmann wavefront detector;
and a second light path: the incident light sequentially passes through the telescope, the tracking and aiming system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror enters the second beam splitter after passing through the first beam splitter, and the beacon light output by the second beam splitter enters the CCD2 after being output by the focusing lens;
and a third light path: the incident light sequentially passes through the telescope, the tracking and aiming system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror enters the second beam splitter after passing through the first beam splitter, and the beacon light entering the second beam splitter enters the avalanche photodiode after sequentially passing through the third beam splitter, the focusing lens and the multimode fiber;
and (4) a light path is as follows: the local signal light source sequentially passes through the focusing lens, the fourth beam splitter, the third beam splitter, the second beam splitter, the first beam splitter, the piezoelectric deformable mirror, the tracking and aiming system and the telescope and then is emitted;
and (5) an optical path five: the local beacon light source sequentially passes through the focusing lens, the fourth beam splitter, the third beam splitter, the second beam splitter, the first beam splitter, the piezoelectric deformable mirror, the tracking and aiming system and the telescope and then is emitted;
step two: all-optical path system based on construction measures delta respectively 1 、δ 2 、δ 3 、δ 4 And delta 5 Wherein, δ 1 、δ 2 、δ 3 、δ 4 、δ 5 Respectively carrying out complete light path total wave front detection measurement corresponding to light paths from one to five;
step three: according to delta 1 、δ 2 、δ 3 、δ 4 And delta 5 In combination with the formula delta i ＝Au i To obtain u 1 、u 2 、u 3 、u 4 And u 5 Wherein A is the response matrix of the piezoelectric deformable mirror, u 1 、u 2 、u 3 、u 4 、u 5 Initial piezoelectric deformable mirror control voltages corresponding to the complete light path are respectively from the first light path to the fifth light path;
step four: according to u 1 、u 2 、u 3 、u 4 、u 5 Controlling the voltage of the piezoelectric deformable mirror to finish aberration correction;
the second step comprises the following specific steps:
step two, firstly: the local signal light source and the local beacon light source are closed, the telescope receives the opposite incident light, and the difference between the total wave forward measurement of the complete light path corresponding to the light path I and the total wave forward measurement of the complete light path corresponding to the light path II, namely delta, is measured 1 -δ 3 ；
Step two: the telescope does not receive the opposite incident light any more, then the local signal light source is started, then the angle reflector is arranged at the emergent end of the telescope, so that the local signal light is emergent from the telescope through the light path IV, then the local signal light is reflected by the angle reflector, returns through the original path, enters the telescope again, is finally received by the light path III, and then the sum of the complete light path total wave front detection measurement corresponding to the light path IV and the complete light path total wave front detection measurement corresponding to the light path III, namely delta, is measured 4 +δ 3 ；
Step two and step three: turn off the local signal light source, turn on the local beacon light sourceThe far mirror still faces the corner reflector, so that the local beacon light is emitted from the telescope, returns to the original path after being reflected by the corner reflector, finally enters the telescope, is received by the light path II, and then the sum of the complete light path total wave front detection measurement corresponding to the light path five and the complete light path total wave front detection quantity corresponding to the light path I and the sum of the complete light path total wave front detection measurement corresponding to the light path five and the complete light path total wave front detection measurement corresponding to the light path II, namely delta 5 +δ 1 And delta 5 +δ 2 ；
Step two, four: turning off the local signal light source and turning on the local beacon light source, replacing the angle reflector with a phase conjugate mirror, applying no voltage to a deformable mirror, enabling the local beacon light to be emitted from the telescope through a light path five, then returning through the original path after being reflected by the phase conjugate mirror, finally receiving by a light path two, and then measuring the sum of the complete light path total wave front detection measurement corresponding to the negative light path five and the complete light path total wave front detection measurement corresponding to the light path one, namely-delta 5 +δ 1 ；
Step two and step five: d, converting-delta obtained in the second step or the fourth step 5 +δ 1 Delta obtained from step two or three 5 +δ 2 And delta 5 +δ 1 Simultaneous formation of delta 1 、δ 2 、δ 5 Then delta will be 1 Substituting the result of the first step into the result of the second step to obtain delta 3 Finally, will delta 3 Substituting the result of the second step into the result of the second step to obtain delta 4 To obtain delta 1 、δ 2 、δ 3 、δ 4 And delta 5 。
The invention has the beneficial effects that:
the utility model discloses a utilize subtend incident light, the static aberration correction technique of full light path of corner reflector and phase conjugation speculum, control deformable mirror produces specific initial compensation face type, can compensate the static aberration of sharing the light path with all non-sharing the light path simultaneously effectively, receive and the transmission signal with guaranteeing communication terminal simultaneously, these four functions of beacon light are not influenced, and then avoid because the deformable mirror correction ability that sharing the light path in the space optical communication and non-sharing the static aberration of light path lead to obviously descends, communication error rate increase, the tracking effect is poor, the problem that transmission signal and beacon light beam quality are poor.
Drawings
FIG. 1 is a diagram of a total optical path system according to the present application;
FIG. 2 is a simplified diagram of a method for correcting the total optical path static aberration;
FIG. 3 is a schematic diagram of the positions and numbers of piezoelectric deformable mirror actuators;
FIG. 4 is a diagram of the structure of the all-optical path system in the first step;
FIG. 5 is a diagram of the structure of the full optical path system in step two;
FIG. 6 is a diagram of the structure of the full optical path system in step two;
FIG. 7 is a diagram of the structure of the full optical path system in step two or four;
FIG. 8 is a schematic diagram of the improvement of a random wavefront RMS for 100 sets of optical paths;
FIG. 9 is a schematic diagram of the RMS improvement of 100 sets of random wavefronts in the second optical path;
FIG. 10 is a schematic diagram of RMS improvement for three 100 sets of random wavefront optical paths;
FIG. 11 is a schematic diagram of RMS improvement of four 100 sets of random wavefronts in an optical path;
FIG. 12 is a schematic diagram of the RMS improvement for five 100 sets of random wavefronts in the optical path.
Detailed Description
It should be noted that, in the case of conflict, the various embodiments disclosed in the present application may be combined with each other.
The first specific implementation way is as follows: specifically, the present embodiment is described with reference to fig. 1, and the method for correcting the total optical path static aberration in the miniaturized terminal for space optical communication according to the present embodiment includes the steps of:
the method comprises the following steps: constructing an all-optical-path module, wherein an all-optical-path system comprises five optical paths:
a first optical path: incident (beacon light) sequentially passes through a telescope, a tracking system and a piezoelectric deformable mirror, the beacon light after passing through the piezoelectric deformable mirror is contracted through a first beam splitter and then enters a summer-Hartmann wavefront detector;
and a second light path: the incident light sequentially passes through the telescope, the tracking and aiming system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror enters the second beam splitter after passing through the first beam splitter, and the beacon light output by the second beam splitter enters the CCD2 after being output by the focusing lens;
and a third light path: the incident light sequentially passes through the telescope, the tracking system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror enters the second beam splitter after passing through the first beam splitter, and the beacon light entering the second beam splitter sequentially passes through the third beam splitter, the focusing lens and the multimode optical fiber and then enters the avalanche photodiode;
and (4) a light path is as follows: the local signal light source sequentially passes through the focusing lens, the fourth beam splitter, the third beam splitter, the second beam splitter, the first beam splitter, the piezoelectric deformable mirror, the tracking and aiming system and the telescope and then is emitted;
and a light path five: the local beacon light source sequentially passes through the focusing lens, the fourth beam splitter, the third beam splitter, the second beam splitter, the first beam splitter, the piezoelectric deformable mirror, the tracking system and the telescope and then is emitted;
step two: all-optical path system based on construction measures delta respectively 1 、δ 2 、δ 3 、δ 4 And delta 5 Wherein, δ 1 、δ 2 、δ 3 、δ 4 、δ 5 Respectively carrying out complete light path total wave front detection measurement corresponding to light paths from one to five;
step three: according to delta 1 、δ 2 、δ 3 、δ 4 And delta 5 And combined with the formula delta i ＝Au i To obtain u 1 、u 2 、u 3 、u 4 And u 5 Wherein A is the response matrix of the piezoelectric deformable mirror, u 1 、u 2 、u 3 、u 4 、u 5 Initial piezoelectric deformable mirror control voltages corresponding to the complete optical path are respectively applied to the optical paths from the first optical path to the fifth optical path;
step four: according to u 1 、u 2 、u 3 、u 4 、u 5 Controlling the voltage of the piezoelectric deformable mirror to finish aberration correction;
the second step comprises the following specific steps:
step two is as follows: the local signal light source and the local beacon light source are closed, the telescope receives the opposite incident light, and the difference between the total wave forward measurement of the complete light path corresponding to the light path I and the total wave forward measurement of the complete light path corresponding to the light path II, namely delta, is measured 1 -δ 3 ；
Step two: the telescope does not receive the opposite incident light any more, then the local signal light source is started, then the angle reflector is arranged at the emergent end of the telescope, so that the local signal light is emergent from the telescope through the light path IV, then the local signal light is reflected by the angle reflector, returns through the original path, enters the telescope again, is finally received by the light path III, and then the sum of the complete light path total wave front detection measurement corresponding to the light path IV and the complete light path total wave front detection measurement corresponding to the light path III, namely delta, is measured 4 +δ 3 ；
Step two and step three: turning off the local signal light source, turning on the local beacon light source, making the telescope still face the corner reflector, making the local beacon light come out from the telescope, returning to the original path after being reflected by the corner reflector, entering the telescope again, finally being received by the light path two, then measuring the sum of the complete light path total wave front detection measurement corresponding to the light path five and the complete light path total wave front detection quantity corresponding to the light path one, and the sum of the complete light path total wave front detection measurement corresponding to the light path five and the complete light path total wave front detection measurement corresponding to the light path two, namely delta 5 +δ 1 And delta 5 +δ 2 ；
Step two, four: turning off the local signal light source and turning on the local beacon light source, replacing the angle reflector with a phase conjugate mirror, applying no voltage to a deformable mirror, enabling the local beacon light to be emitted from the telescope through the light path five, then returning to the telescope through the original path after being reflected by the phase conjugate mirror, finally being received by the light path two, and then measuring the sum of the complete light path total wave front detection measurement corresponding to the negative light path five and the complete light path total wave front detection measurement corresponding to the light path one, namely-delta 5 +δ 1 ；
Step two, five: d, converting-delta obtained in the second step or the fourth step 5 +δ 1 Delta obtained from step two or three 5 +δ 2 And delta 5 +δ 1 Simultaneous obtaining of delta 1 、δ 2 、δ 5 Then delta will be 1 Substituting the result of the first step into the result of the second step to obtain delta 3 Finally, delta will be 3 Substituting the result of the second step into the result of the second step to obtain delta 4 To obtain delta 1 、δ 2 、δ 3 、δ 4 And delta 5 。
The second embodiment is as follows: this embodiment mode is further described with respect to the first embodiment mode, and the difference between this embodiment mode and the first embodiment mode is that the specific steps of the second step are:
step two is one: applying an initial voltage u to the piezoelectric deformable mirror electrode 0 ＝{0，0，...0}；
Step two, two: the received power P of the avalanche photodiode is read, and an evaluation function J is calculated by the formula J-P k (u k ) P, where J is an evaluation function, k denotes the k-th iteration result, and u denotes the piezoelectric deformable mirror control voltage vector;
step two, step three: randomly generating disturbance vector delta u satisfying Bernoulli distribution k ；
Step two, step four: respectively applying positive one-half disturbance vector delta u to the electrodes of the piezoelectric deformable mirror k And negative one-half disturbance vector δ u k Then, the received power P of the avalanche photodiodes is read, and an evaluation function is calculated by the formula J ═ P
Figure BDA0003475886600000051
And
Figure BDA0003475886600000052
step two, step one and step five: according to J k
Figure BDA0003475886600000053
And
Figure BDA0003475886600000054
obtaining the change delta J of the evaluation function k ：
Step two, step one and step six: according to the disturbance vector delta u k And the change of evaluation function δ J k To obtain u k+1 ；
Step two, step one and step seven: judging the value of k, if k is greater than 500 executing the steps of two-eight, if k is less than 500, making u k ＝u k+1 Repeating the step two one by one to the step two one by six;
step two, step one and step eight: obtaining the sub-spot coordinate value of CCD1 in the shack-Hartmann wavefront detector, namely delta 1 -δ 3 。
The third concrete implementation mode: this embodiment mode is further described as a second embodiment mode, and the difference between this embodiment mode and the second embodiment mode is that the second step includes the following specific steps:
step two, step one: applying initial voltage u to piezoelectric deformable mirror electrode 0 ＝{0，0，...0}；
Step two and step two: the received power P of the avalanche photodiode is read, and an evaluation function J is calculated by the formula J-P k (u k ) P, wherein J is an evaluation function, k represents a k-th iteration result, and u represents a piezoelectric deformable mirror control voltage vector;
step two, step three: randomly generating disturbance vector delta u satisfying Bernoulli distribution k ；
Step two, step four: respectively applying positive half of disturbance vector delta u to electrodes of piezoelectric deformable mirror k And negative one-half disturbance vector δ u k Then, the received power P of the avalanche photodiodes is read, and an evaluation function is calculated by the formula J-P
Figure BDA0003475886600000055
And
Figure BDA0003475886600000056
step two, step five: according to
Figure BDA0003475886600000061
And
Figure BDA0003475886600000062
obtaining the change delta J of the evaluation function k ：
Step two, step six: according to the disturbance vector delta u k And the change δ J of the evaluation function k To obtain u k+1 ；
Step two, step seven: judging the value of k, if k is more than 500 executing step twenty-eight, if k is less than 500, making u k ＝u k+1 Repeating the first step to the second step;
step two, two and eight: obtaining the sub-spot coordinate value of CCD1 in the shack-Hartmann wavefront detector, namely delta 4 +δ 3 。
The fourth concrete implementation mode is as follows: this embodiment is a further description of a third specific embodiment, and the difference between this embodiment and the third specific embodiment is that the specific steps in the second and third steps are:
step two, step three and step one: the sub-facula coordinate value of the CCD in the shack-Hartmann wavefront detector is obtained without applying voltage to the piezoelectric deformable mirror, namely the sub-facula coordinate value is delta 5 +δ 1 ；
Step two, step three, step two: applying initial voltage u to piezoelectric deformable mirror electrode 0 ＝{0，0，...0}；
Step two and step three: calculating evaluation function J by using pixel points on CCD2 k (u k ) Wherein, in the step (A),
Figure BDA0003475886600000063
I i is the center of the CCD2 disk, I i Diameter of
Figure BDA0003475886600000064
λ is the wavelength of the beacon light, λ is 808nm, f is the focal length of the front lens of the CCD2, f is 20mm, D is the aperture of the lens, D is 10mm, I o Removing the disc center I from CCD2 i Circular ring of (I) o Has a diameter of
Figure BDA0003475886600000065
Step two, step three and step four: randomly generating disturbance vector delta u satisfying Bernoulli distribution k ；
Step two, step three and step five:respectively applying positive one-half disturbance vector delta u to the electrodes of the piezoelectric deformable mirror k And negative one-half disturbance vector δ u k Then, the received power P of the avalanche photodiodes is read, and an evaluation function is calculated by the formula J ═ P
Figure BDA0003475886600000066
And
Figure BDA0003475886600000067
step two, step three and step six: according to
Figure BDA0003475886600000068
And
Figure BDA0003475886600000069
obtaining the variation delta J of the evaluation function k ：
Step two, pseudo-ginseng: according to the disturbance vector delta u k And the change of evaluation function δ J k To obtain u k+1 ；
Step two, step three and step eight: judging the value of k, if k is greater than 500 executing the step two, three and eight, if k is less than 500, making u k ＝u k+1 Repeating the second step, the second step and the third step;
step two, step three and step nine: obtaining the sub-spot coordinate value of CCD1 in the shack-Hartmann wavefront detector, namely delta 5 +δ 2 。
The fifth concrete implementation mode: the fourth embodiment is a further description of the fourth embodiment, and the difference between the fourth embodiment and the fourth embodiment is that in the second or fourth step, no voltage is applied to the deformable mirror, and the sub-spot coordinate value of the CCD1 in the shack-hartmann wavefront sensor is obtained, that is, the sub-spot coordinate value is- δ 5 +δ 1 。
The sixth specific implementation mode: this embodiment is a further description of a fifth embodiment, and is different from the fifth embodiment in that the change δ J of the evaluation function is k Expressed as:
Figure BDA0003475886600000071
the seventh embodiment: this embodiment mode is a further description of a sixth embodiment mode, and the difference between this embodiment mode and the sixth embodiment mode is that u is described above k+1 Expressed as:
u k+1 ＝u k -γδJ k δu k
where γ is a gain factor.
The specific implementation mode is eight: this embodiment is a further description of a seventh embodiment, and the difference between this embodiment and the seventh embodiment is that the piezoelectric deformable mirror includes 43 electrodes, including 40 electrodes and 3 independent pitch/tilt electrodes on the main mirror.
The specific implementation method nine: this embodiment is further described with respect to the eighth embodiment, and the difference between this embodiment and the eighth embodiment is that the specific step of the fourth step is:
voltage u 'of electrode 1 to 8' 1～8 ＝(u′ 3 [1∶8]+u′ 4 [1∶8])/2；
Voltage u 'of electrode 9 to 40' 9～40 ＝(u′ 1 [9∶40]+u′ 2 [9∶40]+u′ 5 [9∶40])/3；
Voltage u 'of pitch/tilt electrode 1 to 3' tip-tilt ＝u′ 3 [41∶43]。
The specific implementation mode is ten: the present embodiment is further described with respect to the ninth embodiment, and the differences between the present embodiment and the ninth embodiment are that the detection waveband of the shack-hartmann wavefront detector is 400 to 900nm, the aperture is 4.5mm, the number of microlenses is less than or equal to 700, the size is 150 μm, and the focal length is 10 mm.
The schematic diagram of the optical path of the spatial optical communication terminal is shown in fig. 1, and the common optical path is an optical path which all light has undergone before entering a beam splitter BS1 and includes a telescope, a tracking system (laser communication tracking system) and the like; in the five non-common optical paths, the receiving optical path is (1) a beacon light wavefront detection optical path, (2) a beacon light receiving optical path, (3) a signal light receiving optical path, and the transmitting optical path is (4) a signal light transmitting optical path and (5) a beacon light transmitting optical path. In FIG. 1, DM is a deformable mirror, BS 1-BS 4 are four beam splitters, and SH-WFS is a shack-Hartmann wavefront sensor. The incident beacon light is split by a BS1 after passing through a telescope, a tracking system and a DM, one part of the incident beacon light is received by a light path (1), and the other part of the incident beacon light is received by a CCD2 (charge coupled device); the incident signal light is received by the optical path (3) through BS1, BS2, BS 3. Both the local signal light and the local beacon light exit sequentially through BS4, BS3, BS2, BS1, DM, the tracking system, and the telescope. The signal light is different from the beacon light wave band, and the light paths (1) to (4) are all provided with filter plates.
A schematic diagram of a full-light path static aberration correction device in a space optical communication miniaturized terminal is shown in fig. 2, angle reflectors and phase conjugate reflectors are respectively fixed in two directions of a telescope group, and the telescope group can be opposite to the angle reflectors or the phase conjugate reflectors by horizontally rotating.
The principle and operation of the device are described below. The common optical path and each non-common optical path form a complete optical path, and the complete optical path total wave front detection measurement (SH-WFS detection offset) corresponding to the optical paths (1) - (5) are respectively recorded as delta 1 、δ 2 、δ 3 、δ 4 、δ 5 And recording the initial deformable mirror control voltage u corresponding to the complete optical path of the optical paths (1) - (5) 1 、u 2 、u 3 、u 4 、u 5 ，u i [1∶40]Is the control voltage u of the actuator with serial number 1-40 on the main reflector i [41∶43]The individual actuator positions are shown in fig. 3 for the control voltages of the individual pitch/tilt actuator arms numbered 1, 2, 3. Control voltage u i (i-1, 2, 3, 4, 5) and wavefront measurement δ i (i is 1, 2, 3, 4, 5) has a definite mathematical relationship, such as formula (1), where a is a deformable mirror response matrix found in advance. The correction steps are as follows:
δ i ＝Au i (1)
measuring delta 1 -δ 3 : the communication terminal stops operating and receives the incident light, and as shown in fig. 4, the steps (1) to (8) are completed by using a computer.
Applying an initial voltage u to 43 electrodes of the deformable piezoelectric deformable mirror 0 ＝{0，0，...0}；
The received power P of APD is read and an evaluation function J is calculated by the formula (2) k (u k )＝-p；
J＝-P(2)
Randomly generating a random perturbation vector delta u satisfying Bernoulli distribution k ＝{δu 1 ，δu 2 ，...δu 37 }；
The received power P of APD is read, and an evaluation function is calculated by the formula (2)
Figure BDA0003475886600000081
And
Figure BDA0003475886600000082
calculating δ J by equation (3) k ；
δJ＝J + -J - ＝J(u+δu/2)-J(u-δu/2) (3)
Calculating u by equation (4) k+1 ；
u k+1 ＝u k -γδ J kδu k (4)
Determining the value of k, stopping the cycle if k > 500, and making u if k < > 500 k ＝u k+1 Repeating the processes (1) to (6);
storing the optimized CCD1 sub-spot coordinates in a computer hard disk, namely delta 1 -δ 3 ；
Measuring delta 4 +δ 3 : the communication terminal no longer receives the opposite incident light, the local signal light is turned on, and the telescope group turns to the angle reflector, as shown in fig. 5. The signal light is emitted from the telescope through the light path (4), is reflected by the corner reflector, returns to the original path, enters the telescope again, and is finally received by the light path (3). And (3) completing the steps (1) to (8) by using a computer.
Applying an initial voltage u to 43 electrodes of a deformable piezoelectric deformable mirror 0 ＝{0，0，...0}；
The received power P of APD is read and an evaluation function J is calculated by the formula (2) k (u k )；
Randomly generating random disturbance vector delta u satisfying Bernoulli distribution k ＝{δu 1 ，δu 2 ，...δu 43 }；
The received power P of the APD is read, and the evaluation function is calculated by the formula (2)
Figure BDA0003475886600000083
And
Figure BDA0003475886600000084
calculating δ J by equation (3) k ；
Calculating u by equation (4) k+1 ；
Determining the value of k, stopping the cycle if k > 500, and making u if k < > 500 k ＝u k+1 Repeating the processes (1) to (6);
the optimized CCD1 sub-spot coordinates are stored in the hard disk of the computer, and the angle reflector does not change the phase of the wave front, so that the quantity is delta 4 +δ 3 ；
Measuring delta 5 +δ 1 And delta 5 +δ 2 : the signal light is turned off and the beacon light is turned on, with the telescope still facing the corner mirror, as in fig. 6. The local beacon light is emitted from the telescope, reflected by the corner reflector, returned to the original path, enters the telescope again and is finally received by the light path (2). And (4) completing the steps (1) to (9) by using a computer.
The sub-light spot coordinates of the CCD1 are stored in the hard disk of the computer without applying voltage to the deformable mirror, namely delta 5 +δ 1 ；
Applying an initial voltage u to 43 electrodes of a deformable piezoelectric deformable mirror 0 ＝{0，0，...0}；
Calculating an evaluation function J according to formula (5) by using pixel points on the CCD2 k (u k )，I i The center of the disk is the center of CCD and the diameter is
Figure BDA0003475886600000091
λ is the wavelength of the beacon light 800nm, f is the focal length of the front lens of the CCD2, and D is the lensPore diameter of 10mm, I o Is of diameter of
Figure BDA0003475886600000092
The center is CCD center, I is removed i A partial circular ring;
Figure BDA0003475886600000093
randomly generating a random perturbation vector delta u satisfying Bernoulli distribution k ＝{δu 1 ，δu 2 ，...δu 43 }；
Calculating an evaluation function according to formula (3) by using pixel points on the CCD2
Figure BDA0003475886600000094
And
Figure BDA0003475886600000095
calculating δ J by equation (3) k ；
Calculating u by equation (1) k+1 ；
Judging the value of k, stopping iteration if k is more than 500, and making u if k is less than 500 k ＝u k+1 Repeating the processes (2) to (7);
storing the optimized CCD1 sub-spot coordinates in a computer hard disk, namely delta 5 +δ 2 。
Measuring-delta 5 +δ 1 And-delta 5 +δ 2 : still with the beacon light on, the telescope group turns to the phase conjugate mirror, as in fig. 7. The local beacon light is emitted from the telescope through the light path (5), returns through the original path after being reflected by the phase conjugate mirror, enters the telescope again and is finally received by the light path (2). The coordinates of the sub-spots of CCD1 are stored in the hard disk of computer without applying voltage to the deformable mirror, and the conjugate of the wavefront can be obtained by the phase conjugate mirror, and the quantity is-delta 5 +δ 1 。
Delta-obtained in step 4 5 +δ 1 Delta from step 3 5 +δ 2 And delta 5 +δ 1 Simultaneous determination of delta 1 、δ 2 、δ 5 . Then delta will be 1 Substituting the result of step 1 can also determine delta 3 Finally, will delta 3 Substituting the result of step 2to obtain δ 4 。
Through the steps 1 to 5, delta 1 、δ 2 、δ 3 、δ 4 、δ 5 All can be found out, and u can be obtained from the formula (1) 1 、u 2 、u 3 、u 4 、u 5 . Complex u 1 、u 2 、u 3 、u 4 、u 5 And giving an initial surface type of a final deformable mirror capable of balancing four optical path aberrations according to a certain rule as follows:
voltage u of actuator 1-8 1～8 ＝(u 3 [1∶8]+u 4 [1∶8])/2；
Voltage u of actuator 9-40 9～40 ＝(u 1 [9∶40]+u 2 [9∶40]+u 5 [9∶40])/3；
Voltage u of tilt actuator 1-3 tip-tilt ＝u 3 [41∶43]。
The wavefront aberrations received by the SH-WFS measurement optical paths (1) to (3) and the wavefront aberrations received by the measurement optical paths (4) and (5) can be used to obtain the improvement of 100 groups of random wavefront RMS values as shown in FIGS. 8 to 12,
the specific implementation scheme of the all-optical-path aberration correction device in the space optical communication miniaturized terminal is as follows:
the corner reflector is a hollow retroreflector of Thorlab corporation model HRR202-P01 with an entrance aperture of
Figure BDA0003475886600000104
Inch, silver film coated with a protective layer, each surface R for a wavelength of 450nm-2 μm avg > 97.5%, the retroreflected beam is deflected by less than 20 arcseconds.
The deformable mirror is a deformable piezoelectric deformable mirror with the model number of DMH40-P01 of Thorlab company, a silver film with a protective layer, the working wave band is 450nm-20 μm,
Figure BDA0003475886600000105
pupil, with large stroke, highest refresh rate of 4kHz, 43 actuators (40 actuators on the main mirror and 3 independent pitch/tilt actuator arms). .
The SH-WFS selects a wavefront detector with the model of UI-2210M of OKO company, the detection type is CCD detection, the detection wave band is 400-900 nm, the caliber is 4.5mm, the number of micro lenses is less than or equal to 700, the size is 150 mu M, and the focal length is 10 mm.
The test computer is a computer server, the CPU is i 74630K (6x3.4Ghz avec 12Mo LLC, 2Mo L2total), the mainboard ASUS X79-DELUXE, the hard disk SAMSUNG SSD 840PRO 256GB, the graphics card is GAINWARD GEFORCE GT7302GB DDR3 SILENT FX, and the memory is GSKILL16GB (4X4) QUAD CHANNEL F3-14900CL9Q-16 GBZL.
The phase conjugate reflector was a hollow retroreflector array of type AR-60 available from Hao volume photoelectricity corporation with a retroreflector count of 60 and a maximum deviation of 5.0 or 20.0 arcsec.
The beacon light source uses a laser diode with model number ML620G40, wavelength of 808nm, output optical power of 150mw, typical drive current of 180mA, maximum 220mA, and size of
Figure BDA0003475886600000103
The signal light uses a laser diode of model FPL1001C, the wavelength is 1550nm, the output optical power is 150mw, the typical driving current is 400mA, and the maximum driving current is 500 mA.
The detector uses an avalanche photodiode with the model of APD310, the detection waveband is 850-1650nm, the 3dB bandwidth is 5-1000MHz, and the responsivity is 0.9A/W under the wavelength of 1550 nm.
It should be noted that the detailed description is only for explaining and explaining the technical solution of the present invention, and the scope of protection of the claims is not limited thereby. It is intended that all such modifications and variations be included within the scope of the invention as defined in the following claims and the description.

Claims (10)

1. A method for correcting all-optical-path static aberration in a miniaturized terminal for space optical communication is characterized by comprising the following steps:
the method comprises the following steps: constructing an all-optical-path module, wherein an all-optical-path system comprises five optical paths:
a first optical path: the incident light sequentially passes through the telescope, the tracking and aiming system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror is contracted after passing through the first beam splitter, and the contracted light enters the summer-Hartmann wavefront detector;
and a second light path: the incident light sequentially passes through the telescope, the tracking system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror enters the second beam splitter after passing through the first beam splitter, and the beacon light output by the second beam splitter enters the CCD2 after being output by the focusing lens;
and a third light path: the incident light sequentially passes through the telescope, the tracking and aiming system and the piezoelectric deformable mirror, the beacon light passing through the piezoelectric deformable mirror enters the second beam splitter after passing through the first beam splitter, and the beacon light entering the second beam splitter enters the avalanche photodiode after sequentially passing through the third beam splitter, the focusing lens and the multimode fiber;
and (4) a light path is as follows: the local signal light source sequentially passes through the focusing lens, the fourth beam splitter, the third beam splitter, the second beam splitter, the first beam splitter, the piezoelectric deformable mirror, the tracking system and the telescope and then is emitted;
and a light path five: the local beacon light source sequentially passes through the focusing lens, the fourth beam splitter, the third beam splitter, the second beam splitter, the first beam splitter, the piezoelectric deformable mirror, the tracking system and the telescope and then is emitted;
step two: all-optical path system based on construction measures delta respectively 1 、δ 2 、δ 3 、δ 4 And delta 5 Wherein, δ 1 、δ 2 、δ 3 、δ 4 、δ 5 Respectively performing complete light path total wave front detection measurement corresponding to the light paths from the first light path to the fifth light path;
step three: according to delta 1 、δ 2 、δ 3 、δ 4 And delta 5 In combination with the formula delta i ＝Au i To obtain u 1 、u 2 、u 3 、u 4 And u 5 Wherein A is a piezoelectric deformable mirror response matrix，u 1 、u 2 、u 3 、u 4 、u 5 Initial piezoelectric deformable mirror control voltages corresponding to the complete optical path are respectively applied to the optical paths from the first optical path to the fifth optical path;
step four: according to u 1 、u 2 、u 3 、u 4 、u 5 Controlling the voltage of the piezoelectric deformable mirror to finish aberration correction;
the second step comprises the following specific steps:
step two, firstly: the local signal light source and the local beacon light source are turned off, the telescope receives the opposite incident light, and the difference between the total wave front detection measurement of the complete light path corresponding to the light path I and the total wave front detection measurement of the complete light path corresponding to the light path III, namely delta, is measured 1 -δ 3 ；
Step two: the telescope does not receive opposite incident light any more, then a local signal light source is started, then an angle reflector is arranged at the emergent end of the telescope, so that the local signal light is emergent from the telescope through a light path IV, then the local signal light returns through the original path after being reflected by the angle reflector, enters the telescope again, is finally received by a light path III, and then the sum of the complete light path total wave front detection measurement corresponding to the light path IV and the complete light path total wave front detection measurement corresponding to the light path III, namely delta, is measured 4 +δ 3 ；
Step two and step three: turning off the local signal light source, turning on the local beacon light source, making the telescope still face the corner reflector, making the local beacon light come out from the telescope, returning to the original path after being reflected by the corner reflector, entering the telescope again, finally being received by the light path two, then measuring the sum of the complete light path total wave front detection measurement corresponding to the light path five and the complete light path total wave front detection quantity corresponding to the light path one, and the sum of the complete light path total wave front detection measurement corresponding to the light path five and the complete light path total wave front detection measurement corresponding to the light path two, namely delta 5 +δ 1 And delta 5 +δ 2 ；
Step two: the local signal light source is still turned off and the local beacon light source is turned on, the corner reflector is replaced by a phase conjugate mirror, no voltage is applied to a deformable mirror, so that the local beacon light is emitted from the telescope through the light path five, then returns to the original path after being reflected by the phase conjugate mirror and enters the telescope again,finally, the optical path I receives the optical path I, then the complete optical path total wave forward measurement corresponding to the optical path five is measured, and the negative value of the complete optical path total wave forward measurement corresponding to the optical path five and the sum of the complete optical path total wave forward measurement corresponding to the optical path I, namely-delta 5 +δ 1 ；
Step two, five: delta-obtained in the second step and the fourth step 5 +δ 1 Delta obtained from step two or three 5 +δ 2 And delta 5 +δ 1 Simultaneous formation of delta 1 、δ 2 、δ 5 Then delta will be 1 Substituting the result of the first step into the result of the second step to obtain delta 3 Finally, will delta 3 Substituting the result of the second step into the result of the second step to obtain delta 4 To obtain delta 1 、δ 2 、δ 3 、δ 4 And delta 5 。
2. The method for correcting the static aberration of the all optical path in the miniaturized terminal for space optical communication according to claim 1, wherein the first step is as follows:
step two is one: applying an initial voltage u to the piezoelectric deformable mirror electrode 0 ＝{0,0,…0}；
Step two, two: the received power P of the avalanche photodiode is read, and an evaluation function J is calculated by the formula J-P k (u k ) P, where J is an evaluation function, k denotes the k-th iteration result, and u denotes the piezoelectric deformable mirror control voltage vector;
step two, step three: randomly generating disturbance vector delta u satisfying Bernoulli distribution k ；
Step two, step four: respectively applying positive one-half disturbance vector delta u to the electrodes of the piezoelectric deformable mirror k And negative one-half disturbance vector delta u k Then, the received power P of the avalanche photodiodes is read, and an evaluation function is calculated by the formula J-P
Figure FDA0003475886590000021
And
Figure FDA0003475886590000022
step two, step one and step five: according to
Figure FDA0003475886590000023
And
Figure FDA0003475886590000024
obtaining the change delta J of the evaluation function k ：
Step two, step one and step six: according to the disturbance vector delta u k And the change of evaluation function δ J k To obtain u k+1 ；
Step two, step one and step seven: judging the value of k if k>500 then execute step two-eight, if k<When the value is 500, let u k ＝u k+1 Repeating the step two one by one to the step two one by six;
step two, one step and eight step: obtaining the sub-spot coordinate value of CCD1 in the shack-Hartmann wavefront detector, namely delta 1 -δ 3 。
3. The method for correcting all-optical-path static aberration in the miniaturized terminal for space optical communication according to claim 2, wherein the second step comprises the following specific steps:
step two, step one: applying an initial voltage u to the piezoelectric deformable mirror electrode 0 ＝{0,0,…0}；
Step two and step two: the received power P of the avalanche photodiode is read, and an evaluation function J is calculated by the formula J-P k (u k ) P, where J is an evaluation function, k denotes the k-th iteration result, and u denotes the piezoelectric deformable mirror control voltage vector;
step two, step three: randomly generating disturbance vector delta u satisfying Bernoulli distribution k ；
Step two, step four: respectively applying positive one-half disturbance vector delta u to the electrodes of the piezoelectric deformable mirror k And negative one-half disturbance vector delta u k Then, the received power P of the avalanche photodiodes is read, and an evaluation function is calculated by the formula J-P
Figure FDA0003475886590000031
And
Figure FDA0003475886590000032
step two, step five: according to
Figure FDA0003475886590000033
And
Figure FDA0003475886590000034
obtaining the change delta J of the evaluation function k ：
Step two, step six: according to the disturbance vector delta u k And the change of evaluation function δ J k To obtain u k+1 ；
Step two, step seven: judging the value of k if k>500 then go to step two eight, if k<If u is 500, then u k ＝u k+1 Repeating the first step to the second step;
step two, two and eight: obtaining the sub-spot coordinate value of CCD1 in the shack-Hartmann wavefront detector, namely delta 4 +δ 3 。
4. The method for correcting all-optical-path static aberration in the miniaturized terminal for space optical communication according to claim 3, wherein the specific steps of the second step and the third step are as follows:
step two, step three and step one: the sub-facula coordinate value of the CCD in the shack-Hartmann wavefront detector is obtained without applying voltage to the piezoelectric deformable mirror, namely the sub-facula coordinate value is delta 5 +δ 1 ；
Step two, step three, step two: applying an initial voltage u to the piezoelectric deformable mirror electrode 0 ＝{0,0,…0}；
Step two, step three: calculating an evaluation function J by using pixel points on the CCD2 k (u k ) Wherein, in the process,
Figure FDA0003475886590000035
I i is the center of the disk of CCD2, I i Diameter ofIs composed of
Figure FDA0003475886590000036
λ is the wavelength of the beacon light, λ is 808nm, f is the focal length of the front lens of the CCD2, f is 20mm, D is the aperture of the lens, D is 10mm, I o Removing the center of the disk I from CCD2 i Circular ring of (I) o Diameter of
Figure FDA0003475886590000037
Step two, step three and step four: randomly generating disturbance vector delta u satisfying Bernoulli distribution k ；
Step two, step three and step five: respectively applying positive one-half disturbance vector delta u to the electrodes of the piezoelectric deformable mirror k And negative one-half disturbance vector delta u k Then, the received power P of the avalanche photodiodes is read, and an evaluation function is calculated by the formula J ═ P
Figure FDA0003475886590000038
And
Figure FDA0003475886590000039
step two, step three and step six: according to
Figure FDA00034758865900000310
And
Figure FDA00034758865900000311
obtaining the change delta J of the evaluation function k ：
Step two, pseudo-ginseng: according to the disturbance vector delta u k And the change δ J of the evaluation function k To obtain u k+1 ；
Step two, step three and step eight: judging the value of k if>500 then execute step two, three, eight, if k<When the value is 500, let u k ＝u k+1 Repeating the second step, the second step and the third step;
step two, step three and step nine: obtaining sub-spot coordinate values of CCD1 in shack-Hartmann wavefront detector, i.e. obtaining sub-spot coordinate valuesIs delta 5 +δ 2 。
5. The method for correcting all-optical path static aberration in the miniaturized terminal for space optical communication according to claim 4, wherein in the second or fourth step, no voltage is applied to the deformable mirror, and the sub-spot coordinate value of CCD1 in the shack-Hartmann wavefront detector is obtained, namely the sub-spot coordinate value is- δ 5 +δ 1 。
6. The method for correcting all-optical-path static aberration in the miniaturized terminal for space optical communication according to claim 5, wherein the variation δ J of the evaluation function k Expressed as:
Figure FDA0003475886590000041
7. the method for correcting all-optical path static aberration in the miniaturized terminal for space optical communication according to claim 6, wherein said u is k+1 Expressed as:
u k+1 ＝u k -γδJ k δu k
where γ is a gain factor.
8. The method for correcting all-optical path static aberration in a space optical communication miniaturized terminal according to claim 7, wherein said piezoelectric deformable mirror comprises 43 electrodes, including 40 electrodes and 3 independent pitch/tilt electrodes on the main mirror.
9. The method for correcting the static aberration of the all optical path in the miniaturized terminal for space optical communication according to claim 8, wherein the fourth step is specifically:
voltage u 'of electrode 1 to 8' 1～8 ＝(u′ 3 [1:8]+u′ 4 [1:8])/2；
Voltage u 'of electrode 9 to 40' 9～40 ＝(u′ 1 [9:40]+u′ 2 [9:40]+u′ 5 [9:40])/3；
Voltage u 'of pitch/tilt electrode 1 to 3' tip-tilt ＝u′ 3 [41:43]。
10. The method for correcting all-optical path static aberration in the miniaturized terminal for space optical communication according to claim 9, wherein the detection waveband of the shack-Hartmann wavefront detector is 400-900 nm, the aperture is 4.5mm, the number of the micro lenses is less than or equal to 700, the size is 150 μm, and the focal length is 10 mm.
CN202210055109.XA 2022-01-18 2022-01-18 All-optical-path static aberration correction method in space optical communication miniaturized terminal Active CN114460739B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210055109.XA CN114460739B (en) 2022-01-18 2022-01-18 All-optical-path static aberration correction method in space optical communication miniaturized terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210055109.XA CN114460739B (en) 2022-01-18 2022-01-18 All-optical-path static aberration correction method in space optical communication miniaturized terminal

Publications (2)

Publication Number Publication Date
CN114460739A CN114460739A (en) 2022-05-10
CN114460739B true CN114460739B (en) 2022-07-26

Family

ID=81409615

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210055109.XA Active CN114460739B (en) 2022-01-18 2022-01-18 All-optical-path static aberration correction method in space optical communication miniaturized terminal

Country Status (1)

Country Link
CN (1) CN114460739B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105607250A (en) * 2015-12-31 2016-05-25 中国科学院光电技术研究所 Non-common-optical-path aberration measurement and compensation apparatus and method in high-resolution imaging telescope

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070229993A1 (en) * 2006-03-30 2007-10-04 Hamid Hemmati Compensating for a telescope's optical aberrations using a deformable mirror
US8907260B2 (en) * 2011-01-14 2014-12-09 The United States Of America, As Represented By The Secretary Of The Navy Extended source wavefront sensor through optical correlation with a change in centroid position of light corresponding to a magnitude of tip/tilt aberration of optical jitter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105607250A (en) * 2015-12-31 2016-05-25 中国科学院光电技术研究所 Non-common-optical-path aberration measurement and compensation apparatus and method in high-resolution imaging telescope

Also Published As

Publication number Publication date
CN114460739A (en) 2022-05-10

Similar Documents

Publication Publication Date Title
CN105223688B (en) A kind of laser beam wave-front correction system and method
WO2007087058A8 (en) Sequential wavefront sensor
CN102981270A (en) Unblocked adaptive varifocal optical system and calibration method thereof
CN104037606A (en) Distributed self-adaptive optical system based on optical fibers
CN104776801A (en) Information processing apparatus and information processing method
CN109253707B (en) Hundred-micrometer range transmission type interference testing device
CN110737103B (en) Large-caliber off-axis catadioptric multichannel optical system assembling and adjusting method
CN113552725A (en) Laser beam coaxial co-wave surface control system and method
CN112147622B (en) Distance measuring device, distance measuring method, camera and electronic equipment
CN111006851B (en) Wavefront detection device and method for edge sub-mirror in splicing mirror
CN114597762A (en) Blue light semiconductor laser beam combining device and high-brightness blue light output method
CN114460739B (en) All-optical-path static aberration correction method in space optical communication miniaturized terminal
US20200041351A1 (en) Wavefront sensor device and method
CN113465520A (en) System and method for realizing measurement of thickness and inclination angle of transparent material
CN103427904A (en) Aberration compensation method of space optical communication terminal based on ground testing
US20220196468A1 (en) Device and method for determining a focal position of laser beam
CN114355607B (en) Non-common-path aberration self-correction method for space optical communication miniaturized terminal
CN105004421A (en) Imaging spectrometer taking grating as boundary
CN114326102B (en) Static aberration correction method for space optical communication miniaturized terminal
JP2004251783A (en) Spherical aberration measuring instrument
CN114185144A (en) Method for adjusting large-caliber optical system based on small-caliber plane mirror
CN112558038A (en) Scanning method of laser radar
CN117293627B (en) Miniaturized device for integrated dynamic monitoring of direction and power and application method thereof
CN111965812B (en) Human eye-simulating scanning method and system based on zoom liquid lens and Abbe prism
CN210465679U (en) Laser radar optical structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Wang Yiqun

Inventor after: Yu Siyuan

Inventor after: Yang Xinghao

Inventor after: Xu Xiang

Inventor before: Yu Siyuan

Inventor before: Yang Xinghao

Inventor before: Xu Xiang

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20230801

Address after: 310000 No. 1818, Wenyi West Road, Hangzhou, Zhejiang

Patentee after: ZHEJIANG LAB

Patentee after: HARBIN INSTITUTE OF TECHNOLOGY

Address before: 150001 No. 92 West straight street, Nangang District, Heilongjiang, Harbin

Patentee before: HARBIN INSTITUTE OF TECHNOLOGY