CN1542490A - Precise rotation biprism optical beam scanner and control method thereof - Google Patents

Precise rotation biprism optical beam scanner and control method thereof Download PDF

Info

Publication number
CN1542490A
CN1542490A CNA2003101084877A CN200310108487A CN1542490A CN 1542490 A CN1542490 A CN 1542490A CN A2003101084877 A CNA2003101084877 A CN A2003101084877A CN 200310108487 A CN200310108487 A CN 200310108487A CN 1542490 A CN1542490 A CN 1542490A
Authority
CN
China
Prior art keywords
computing machine
prism
cos
angle
sin
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.)
Granted
Application number
CNA2003101084877A
Other languages
Chinese (zh)
Other versions
CN1256609C (en
Inventor
云茂金
祖继锋
孙建锋
阳庆国
许楠
刘立人
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.)
Shanghai Institute of Optics and Fine Mechanics of CAS
Original Assignee
Shanghai Institute of Optics and Fine Mechanics of CAS
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 Shanghai Institute of Optics and Fine Mechanics of CAS filed Critical Shanghai Institute of Optics and Fine Mechanics of CAS
Priority to CN 200310108487 priority Critical patent/CN1256609C/en
Publication of CN1542490A publication Critical patent/CN1542490A/en
Application granted granted Critical
Publication of CN1256609C publication Critical patent/CN1256609C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Abstract

The precise rotary double-prism light beam scanner for scanning in laser beam space includes drive circuit, two motors, transmission mechanism and double circular prisms; and features that there are computer and PID controller before the drive circuit, that the computer is provided with special data base for the data of rotation angle of the double circular prisms and angle of transmitted light beam to be stored in, and that two angle sensors are set in the output of the transmission mechanism and the double circular prisms and have output contained to the computer. The present invention has precision of the elevation and azimuth of the transmitted light beam reaching the mr level and expanded scanning range of the scanner.

Description

Accurate rotation double prism beam scanner and control method thereof
Technical field
The spacescan of the present invention and laser beam and catch relevant, particularly a kind of accurate rotation double prism beam scanner and control method thereof.
Background technology
The spacescan of laser beam and catch be always space optical communication and laser radar technique give priority to one of research direction.Space optical communication and laser radar must scan and catch target to effective space exploration with laser beam, reach the purpose in accurate realization communication and measurement target distance and orientation.For reach this purpose formerly technology [1] (referring to Optics Guide 5, Chapter 10, Page12.) and formerly technology [2] is (referring to patents such as Zu Jifeng, application number: 03129234.8, in June, 2003 applying date) mention and utilize rotation biprism device to realize the two-dimensional scan of laser beam in particular range.Its ultimate principle is to drive two prism rotations respectively with two motors, when a certain laser beam after the turning axle direction incident of prism, through light beam after two prismatic refractions can be in a specific circular cone deflection and produce certain angle of pitch and position angle (target of catching or scanning is in the above-mentioned greatest circle cone angle that can obtain) in the process of calculating light beam deflection angle after by rotation biprism system continuously, formerly technology all is that the very little and light beam vertical irradiation of drift angle at the hypothesis prism is on prism and obtain the approximate formula of deflection angle
δ = 2 ( n - 1 ) α cos ( θ 1 - θ 2 2 ) - - ( 1 )
And position angle
Φ = θ 1 + θ 2 2 - - ( 2 )
Its control procedure is to derive θ according to (1) (2) 1=f 1(δ, Φ), θ 2=f 2(δ Φ) realizes (accompanying drawing 1) 1 data converting circuit by means of data converting circuit then; 2 servo control circuits; 3 driving circuits; 4,5 motors; 6 gear trains; 7,8 circular prisms.Because formula (1) is approximate obtaining under the very little situation of the drift angle of prism, so its precision and sweep limit are subjected to certain restriction.
Summary of the invention
The technical problem to be solved in the present invention be to overcome above-mentioned technology formerly deficiency, provide light beam after by rotation biprism system deflection angle δ and the exact formulas of position angle Φ, and a kind of accurate rotation double prism beam scanner and control method thereof have been proposed according to this formula, reach the milliradian magnitude and enlarge sweep limit with the precision that improves biprism.
Design philosophy of the present invention can be described below:
The principal section of two circular prisms is all in the XY face when supposing beginning, the direction of rib is along the direction of Z, the unit vector of incident beam is A=(sin cos θ in XYZ coordinate system, sin sin θ, cos ), can derive the deflection angle δ of light beam after two prisms and the rotation angle θ of position angle Φ and two prisms 1, θ 2Between the pass be:
Φ＝0，(sin 2 2?sin 2(θ 22+δ 2)＝1) (4)
(3) in (4) two formulas:
2＝cos -1{sin[cos -1(sincosθsinθ 1+cosθ 1cos)]cos(θ 11+δ 1)sin(θ 2-θ 1)+cos(θ 2-θ 1)cos 1}
(5)
Figure A20031010848700053
(5) in (6) formula
1＝cos -1(sincosθsinθ 1+cosθ 1cos)
Figure A20031010848700056
(7) in the formula
Figure A20031010848700057
(8) in the formula
As can be known after the direction of incident beam is determined, just can draw different rotational angle theta according to The above results 1, θ 2The deflection angle δ and the position angle Φ of corresponding light beam.
But the control procedure of scanner is how (δ Φ) determines the anglec of rotation (θ of two prisms by given parameter 1, θ 2)? can not draw analytic expression θ by (3) (4) 1=f 1(δ, Φ), θ 2=f 2Therefore (δ, Φ), formerly the control method in the technology is inapplicable to this device, but can draw (θ by formula (3) (4) 1, θ 2) and (δ, Φ) between value corresponding separate.For this reason, be that the matlab program is write on the basis with formula (3) (4), to the apex angle of prism, the refractive index n initialize of material, make θ according to actual conditions 1, θ 2In [0 2 π],, can draw a series of and (θ respectively with certain step-length value 1, θ 2) corresponding (δ, Φ), all (θ of maintenance 1, θ 2) and (δ, Φ) corresponding relation between and deposit a database in.The precision of this database is by θ 1, θ 2Step-length determine, such as being when step-length 2 π 1500 ( 2 π 1500 ≈ 0.004 ) Can be as accurate as the milliradian magnitude, can also shorten step-length according to accuracy requirement certainly, but its precision can not surpass diffraction limit
Figure A20031010848700062
(δ can find out after Φ) satisfied in this database when given Δ = ( δ - δ n ) 2 + ( Φ - Φ n ) 2 (δ for minimum value n, Φ n), then in the database with (δ n, Φ n) corresponding (θ 1n, θ 2n) be the angle of two circular each spinnings of prism.
Technical solution of the present invention is as follows:
A kind of precision rotation double prism beam scanner that is used for laser beam space scanning, comprise that driving circuit, motor, gear train, Double Circle prism, driving circuit receive instruction and make the rotation of Double Circle prism by this instruction drive motor respectively by gear train, it is characterized in that before driving circuit, also having computing machine and PID controller, be provided with private database in this computing machine, this database has the anglec of rotation (θ of Double Circle prism 1, θ 2) and the transmitted light beam angle of pitch and position angle (δ n, Φ n) corresponding numerical value, also be provided with angular transducer at the output terminal of gear train, its output termination computing machine.
The control method of described accurate rotation double prism beam scanner is characterized in that comprising the following steps:
1. according to the apex angle of Double Circle prism, the refractive index n of material, make θ 1, θ 2Between (0～2 π),, press following formula respectively by selected step-length value:
(3)
Figure A20031010848700071
Φ＝0.(sin 2 2?sin 2(θ 22+δ 2)＝1) (4)
(3) in (4) two formulas:
2＝cos -1{sin[cos -1(sincosθsinθ 1+cosθ 1?cos)]cos(θ 11+δ 1)sin(θ 2-θ 1)+cos(θ 2-θ 1)cos 1}
(5)
Figure A20031010848700073
(5) in (6) formula
Figure A20031010848700074
1＝cos -1(sincosθsinθ 1+cosθ 1cos)
Figure A20031010848700075
(7) in the formula
Figure A20031010848700076
(8) in the formula
Figure A20031010848700077
Utilize computing machine (1) to obtain a series of and (θ 1, θ 2) corresponding to target location (δ n, φ n) numerical solution, and deposit in the private database of computing machine (1);
2. with target position information (δ x, φ x) input computing machine after, computing machine is promptly found out satisfied at private database Δ = ( δ x - δ n ) 2 + ( Φ x - Φ n ) 2 (δ for minimum value n, Φ n), computing machine finds (δ n, Φ n) after, in private database, choose corresponding with it (θ again 1n, θ 2n);
3. with (θ 1n, θ 2n) and the actual angle that measures of angular transducer (θ ' 1n, θ ' 2n) compare, resulting difference is input to the PID controller, and this PID controller generation control signal corresponding drives bi-motor respectively by driving circuit and rotates to reposition by kinematic train drive Double Circle prism;
4. at this moment, two angular transducers again can with the new angle of each self-inductance measurement Double Circle prism (θ " 1n, θ " 2n) send into computing machine, computing machine is again with (θ 1n, θ 2n) with (θ " 1n, θ " 2n) compare, and difference is input to the PID controller, this controller generation control signal corresponding drives two motors respectively by driving circuit and rotates to reposition by kinematic train drive Double Circle prism;
5. so circulation makes the deflection angle of light beam and position angle satisfy target position information (δ at last x, Φ x).Described anglec of rotation θ 1, θ 2Step-length elect as
Described private database (9) Datebase1.00 is divided into four word banks: azimuthal scope is (0 among the Datebase1.01, pi/2), azimuthal scope is (a pi/2 among the Datebase1.02, π), azimuthal scope is (π among the Datebase1.03,3 pi/2s), azimuthal scope is (3 pi/2s, 2 π) among the Datebase1.04.
Technique effect of the present invention:
The present invention and the difference of technology [1] [2] formerly are to replace data converting circuit in the technology formerly with the database that has in computing machine and the computing machine, have also increased by two angular transducers in addition and have improved the precision that prism rotates.Formerly the data converting circuit in the technology changes servo-control signal into control signal according to approximate formula (1) (2), and the database among the present invention is the exact solution that draws according to formula (3) (4), therefore according to given (δ x, Φ x) control signal (θ that in the storehouse, finds 1n, θ 2n) be more accurate, with (θ 1n, θ 2n) and the corner angle actual angle that records of angular transducer (θ ' 1n, θ ' 2n) difference input PID controller, controller produce control signal by driving circuit drive the prism rotation make transmitted light beam deflect into (δ ' x, Φ ' x), Theoretical Calculation shows works as θ 1, θ 2Step-length be
Figure A20031010848700082
The time, (δ ' x, Φ ' x) and actual target position signal (δ x, Φ x) error can be controlled in the milliradian magnitude, the precision of this invention is at least than the high order of magnitude of precision of technology formerly.The derivation of formula (1) (2) also is subjected to the restriction of the condition of light beam vertical incidence on prism in addition, and formula (3) (4) draw the restriction that is not subjected to this condition, so this invention can realize the control to arbitrarily angled incident light.
Description of drawings:
Fig. 1 is the structured flowchart of technology formerly, among the figure: 1 0-data converting circuit; 2 0-servo control circuit; The 3-driving circuit; 4,5-motor; The 6-gear train; 7, the circular prism of 8-.
Fig. 2 is a structured flowchart of the present invention, among the figure: the 1-computing machine; The 2-PID controller; The 3-driving circuit; 4,5-motor; The 6-gear train; 7, the circular prism of 8-; The 9-database; 10,11-angular transducer
Fig. 3 is the sectional view of circular prism, and the drift angle of prism is α=15 °, diameter of phi=250mm.
Fig. 4 be the expression light beam after through two circle prisms deflection angle δ and the definition of position angle Φ.
Fig. 5 is the schematic perspective view of rotation biprism.
The schematic flow sheet of Fig. 6 control method of the present invention.
Embodiment:
See also Fig. 3 earlier, Fig. 3 is the right structured flowchart of the present invention's accurate rotation double prism beam scanner, as seen from the figure, the accurate rotation of the present invention double prism beam scanner, comprise driving circuit 3, two motors 4,5, gear train 6, Double Circle prism 7,8, this driving circuit 3 receive instruction and drive two motors 4 by this instruction, 5 make Double Circle prism 7 respectively by gear train 6,8 rotations is characterized in that also having computing machine 1 and PID controller 2 before driving circuit 3, are provided with private database 9 in this computing machine 1, output terminal at gear train 6 also is provided with two angular transducers 10,11, the output termination computing machine 1 of this two angular transducer 10,11.
The control method of described accurate rotation double prism beam scanner comprises the following steps:
1. according to the apex angle of Double Circle prism 7,8, the refractive index n of material, make θ 1, θ 2Between (0～2 π),, press following formula respectively by selected step-length value:
Figure A20031010848700091
Figure A20031010848700092
Φ＝0，(sin 2 2?sin 2(θ 22+δ 2)＝1) (4)
(3) in (4) two formulas:
2＝cos -1{sin[cos -1(sincosθsinθ 1+cosθ 1cos)]cos(θ 11+δ 1)sin(θ 2-θ 1)+cos(θ 2-θ 1)cos 1}
(5)
Figure A20031010848700093
Figure A20031010848700094
(5) in (6) formula
Figure A20031010848700101
1＝cos -1(sincosθsinθ 1+cosθ 1cos)
Figure A20031010848700102
(7) in the formula
Figure A20031010848700103
(8) in the formula
Figure A20031010848700104
Utilize computing machine 1 to obtain a series of and (θ 1, θ 2) corresponding to target location (δ n, Φ n) numerical solution, and deposit in the database 9 of computing machine 1;
2. work as target position information (δ x, Φ x) input computing machine 1 after, computing machine 1 is promptly found out satisfied at private database 9 Δ = ( δ x - δ n ) 2 + ( Φ x - Φ n ) 2 (δ for minimum value n, Φ n), computing machine 1 finds (δ n, Φ n) after, in private database 9, choose corresponding with it (θ again 1n, θ 2n), with (θ 1n, θ 2n) and the actual angle that measures of angular transducer 10,11 (θ ' 1n, θ ' 2n) compare, resulting difference is input to PID controller 2, and the control signal that this controller 2 produces drives two motors 4,5 respectively by driving circuit 3 and rotates to reposition by kinematic train 6 drive Double Circle prisms 7,8:
3. at this moment, angular transducer 10,11 again can with the new angle of the circular prism 7,8 of sensing (θ " 1n, θ " 2n) send into computing machine 1, computing machine 1 is again with (θ 1n, θ 2n) with (θ " 1n, θ " 2n) compare, and difference is input to PID controller 2, the control signal that this controller 2 produces by driving circuit 3 respectively drive motor 4,5 drive circular prism 7,8 by kinematic train 6 and rotate to reposition, so circulation makes the deflection angle of light beam and position angle satisfy target position information (δ at last x, Φ x).
Described anglec of rotation θ 1, θ 2Step-length elect as
Described database (9) Datebase1.00 is divided into four word banks: azimuthal scope is (0 among the Datebase1.01, pi/2), azimuthal scope is (a pi/2 among the Datebase1.02, π), azimuthal scope is (π among the Datebase1.03,3 pi/2s), azimuthal scope is (3 pi/2s, 2 π) among the Datebase1.04.
The material of circular prism 7,8 is a K9 glass, and diameter of phi is 250mm, and as shown in Figure 2, wavelength is the turning axle incident of the incident light of 632.8nm along prism, requires its sweep limit at ± 15 °, and scanning accuracy is the milliradian magnitude.
Can get refractive index n=1.51467 according to given condition, the incident vector is (0,1,0); By the derivation of formula (3) (4), learn rotation angle θ when two circular prisms 7,8 1=θ 2=0 o'clock, light beam had maximum deflection angle, and substitution formula (3) (4) can be obtained when the apex angle of prism is 14.375 ° respectively, and the maximum deflection angle of light beam can reach 15 °.For guaranteeing the sweep limit of its regulation, the apex angle that we make two prisms is 15 °, the anglec of rotation θ of two prisms 1, θ 2Step-length be
Figure A20031010848700111
The precision of this system can reach the milliradian magnitude, also can further shorten step-length, but the control accuracy of this method be subjected to the influence of actual light physical construction according to the different requirements of precision, and ultimate precision should be
Figure A20031010848700112
After computing machine 1 operation, can obtain database 9-Datebase1.00 according to formula (3)/(4), for response time of shortening whole process scope according to position angle Φ is divided into Datebase1.00 four word banks and deposits computing machine 1 in, azimuthal scope is (0, pi/2) among the Datebase1.01, azimuthal scope is (a pi/2 among the Datebase1.02, π), azimuthal scope is (π, 3 pi/2s) among the Datebase1.03, azimuthal scope is (3 pi/2s, 2 π) among the Datebase1.04.
When system receives target position information (δ x, Φ x), computing machine 1 can be controlled according to the flow process of Fig. 6: according to Φ xValue judge (δ x, Φ x) in which word bank, and in this word bank, search satisfied Δ = ( δ x - δ n ) 2 + ( Φ x - Φ n ) 2 (δ for minimum value n, Φ n), call then and (δ n, Φ n) corresponding (θ 1n, θ 2n), with (θ 1n, θ 2n) and the actual angle that measures of angular transducer 10,11 (θ ' 1n, θ ' 2n) compare, resulting difference is input to PID controller 2.The control signal that this controller produces is rotated corresponding angle by driving circuit 3 drive motor 4,5, drives Double Circle prism 7,8 by gear train 6 and rotates to corresponding position, and transmitted light beam deflects into (δ x, Φ x), this moment and target location (δ x, Φ x) the error control precision in the milliradian magnitude.

Claims (4)

1, a kind of precision rotation double prism beam scanner that is used for laser beam space scanning, comprise driving circuit (3), two motors (4,5), gear train (6), Double Circle prism (7,8), it is characterized in that computing machine (1) and PID controller (2) being arranged before at driving circuit (3), be provided with private database (9) in this computing machine (1), this database (9) has the anglec of rotation θ of Double Circle prism (7,8) 1, θ 2With transmitted light beam angle of pitch δ nWith position angle Φ nCorresponding numerical value, at corresponding two angular transducers (10,11) that are provided with of the output terminal and the Double Circle prism (7,8) of gear train (6), its output terminal connects computing machine (1).
2, the control method of accurate rotation double prism beam scanner according to claim 1 is characterized in that comprising the following steps:
1. according to the apex angle of Double Circle prism (7,8), the refractive index n of material, make θ 1, θ 2Between (0～2 π),, press following formula respectively by selected step-length value:
Figure A2003101084870002C1
Figure A2003101084870002C2
Φ＝0，(sin 2 2sin 2(θ 2+δ 2)＝1) (4)
(3) in (4) two formulas:
2＝cos -1{sin[cos -1(sincosθsinθ 1+cosθ 1cos)]cos(θ 11+δ 1)sin(θ 2-θ 1)+cos(θ 2-θ 1)cos 1}
(5)
Figure A2003101084870002C3
Figure A2003101084870002C4
(5) in (6) formula
1＝cos -1(sincosθsinθ 1+cosθ 1cos)
Figure A2003101084870003C1
(7) in the formula
Figure A2003101084870003C2
(8) in the formula
Figure A2003101084870003C3
Utilize computing machine (1) to obtain a series of and (θ 1, θ 2) corresponding to target location (δ, numerical solution Φ), and depositing in the private database (9) of computing machine (1);
2. with target position information (δ x, φ x) after input computing machine (1), computing machine (1) is promptly found out satisfied at private database (9) Δ = ( δ x - δ n ) 2 + ( Φ x - Φ n ) 2 (δ for minimum value n, Φ n), computing machine (1) finds (δ n, Φ n) after, in private database (9), choose corresponding with it (θ again 1n, θ 2n);
3. with (θ 1n, θ 2n) and the actual angle (θ that measures of angular transducer (10,11) 1n', θ 2n') compare, resulting difference is input to PID controller (2), and the control signal that this controller (2) produces drives circular prism (7,8) by driving circuit (3) difference drive motor (4,5) by kinematic train (6) and rotates to reposition;
4. at this moment, angular transducer (10,11) again can with the new angle of the circular prism of sensing (7,8) (θ " 1n, θ " 2n) send into computing machine (1), computing machine (1) is again with (θ 1n, θ 2n) with (θ " 1n, θ " 2n) compare, and difference is input to PID controller (2), the control signal that this controller (2) produces drives circular prism (7,8) by driving circuit (3) difference drive motor (4,5) by kinematic train (6) and rotates to reposition;
5. so circulation makes the deflection angle of light beam and position angle satisfy target position information (δ at last x, Φ x).
3, control method according to claim 2 is characterized in that described anglec of rotation θ 1, θ 2Step-length elect as
4, control method according to claim 2, it is characterized in that described private database (9)-Datebase1.00 is divided into four word banks: azimuthal scope is (0 among the Datebase1.01, pi/2), azimuthal scope is (a pi/2 among the Datebase1.02, π), azimuthal scope is (π, 3 pi/2s) among the Datebase1.03, azimuthal scope is (3 pi/2s, 2 π) among the Datebase1.04.
CN 200310108487 2003-11-07 2003-11-07 Precise rotation biprism optical beam scanner and control method thereof Expired - Fee Related CN1256609C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200310108487 CN1256609C (en) 2003-11-07 2003-11-07 Precise rotation biprism optical beam scanner and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200310108487 CN1256609C (en) 2003-11-07 2003-11-07 Precise rotation biprism optical beam scanner and control method thereof

Publications (2)

Publication Number Publication Date
CN1542490A true CN1542490A (en) 2004-11-03
CN1256609C CN1256609C (en) 2006-05-17

Family

ID=34334699

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200310108487 Expired - Fee Related CN1256609C (en) 2003-11-07 2003-11-07 Precise rotation biprism optical beam scanner and control method thereof

Country Status (1)

Country Link
CN (1) CN1256609C (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340899C (en) * 2005-06-08 2007-10-03 中国科学院上海光学精密机械研究所 Light-beam offset mechanic apparatus with double light wedges
CN101881975A (en) * 2010-06-24 2010-11-10 中国人民解放军总参谋部第六十研究所 Double-optical-wedge laser beam angle automatic controller
CN104793334A (en) * 2015-04-02 2015-07-22 同济大学 Cascading coarse-fine data coupling optical scanning device
CN105353781A (en) * 2015-12-15 2016-02-24 中国科学院光电技术研究所 Method for improving pointing precision of achromatic rotating prism group
CN108614343A (en) * 2018-01-10 2018-10-02 中国航空工业集团公司北京长城航空测控技术研究所 A kind of variable apex angle prism of biprism structure
CN108717195A (en) * 2018-05-24 2018-10-30 远景能源（江苏）有限公司 A kind of coherent Doppler wind-observation laser radar system and its control method
CN109884791A (en) * 2019-02-28 2019-06-14 中国科学院光电技术研究所 A kind of quick high accuracy scan method based on rotation biprism
CN111123507A (en) * 2019-11-28 2020-05-08 武汉华中天经通视科技有限公司 Synchronous scanning rotating double-prism device and one-dimensional scanning method thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340899C (en) * 2005-06-08 2007-10-03 中国科学院上海光学精密机械研究所 Light-beam offset mechanic apparatus with double light wedges
CN101881975A (en) * 2010-06-24 2010-11-10 中国人民解放军总参谋部第六十研究所 Double-optical-wedge laser beam angle automatic controller
CN104793334A (en) * 2015-04-02 2015-07-22 同济大学 Cascading coarse-fine data coupling optical scanning device
CN104793334B (en) * 2015-04-02 2017-03-01 同济大学 A kind of coarse-fine coupling optical scanning means of cascade
CN105353781A (en) * 2015-12-15 2016-02-24 中国科学院光电技术研究所 Method for improving pointing precision of achromatic rotating prism group
CN105353781B (en) * 2015-12-15 2018-06-12 中国科学院光电技术研究所 A kind of method for improving achromatism rotating prism group pointing accuracy
CN108614343A (en) * 2018-01-10 2018-10-02 中国航空工业集团公司北京长城航空测控技术研究所 A kind of variable apex angle prism of biprism structure
CN108717195A (en) * 2018-05-24 2018-10-30 远景能源（江苏）有限公司 A kind of coherent Doppler wind-observation laser radar system and its control method
CN108717195B (en) * 2018-05-24 2020-12-25 远景能源有限公司 Coherent Doppler wind lidar system and control method thereof
CN109884791A (en) * 2019-02-28 2019-06-14 中国科学院光电技术研究所 A kind of quick high accuracy scan method based on rotation biprism
CN111123507A (en) * 2019-11-28 2020-05-08 武汉华中天经通视科技有限公司 Synchronous scanning rotating double-prism device and one-dimensional scanning method thereof
CN111123507B (en) * 2019-11-28 2022-02-08 武汉华中天经通视科技有限公司 Synchronous scanning rotating double-prism device and one-dimensional scanning method thereof

Also Published As

Publication number Publication date
CN1256609C (en) 2006-05-17

Similar Documents

Publication Publication Date Title
CN105823435B (en) A kind of gear measurement device and gear measuring method based on laser displacement sensor
CN100342210C (en) Laser self-collimation zero reference error angle measuring method
CN1256609C (en) Precise rotation biprism optical beam scanner and control method thereof
CN1508511A (en) Method for calibrating structure optical vision sensor
CN102120230B (en) Device and method for measuring bending angle of bent piece
CN106959697B (en) Automatic indoor map construction system for long straight corridor environment
CN1673682A (en) Laser measuring method and laser measuring system
CN107144248B (en) A kind of scaling method of numerically-controlled machine tool turntable error
CN112013787B (en) Blade three-dimensional contour reconstruction method based on blade self-characteristics
CN1939638A (en) Display method for laser irradiations state and display system of laser irradiation state
CN1726442A (en) Method and apparatus for fabricating a light management substrates
CN1022778C (en) Direct real-time measuring method for angle of side slip of wind tunnel
CN101067628A (en) Vector correcting method for non-gyro accelerometer array mounting error
CN104028890A (en) Large-stroke column coordinate two-photon polymerization processing method and device
CN1111110C (en) Laser plate roller carving system and method
CN2655268Y (en) Precise rotation biprism light beam scanner
CN1011541B (en) Six-contact type high-precision planeness-measuring method and its apparatus
CN115096261A (en) Method for measuring forging inclination based on improved ellipse fitting optimization algorithm
CN1761428A (en) Ultrasonic probe and ultrasonographic device
CN1657872A (en) Rotary scanning measuring apparatus
CN1214003A (en) Error correction appts. for NC machine tool
CN103913463B (en) A kind of line array CCD realizes the method for ball-screw reconstruct
CN1912532A (en) Three-D visual measuring quantity transmission method and plane target mark
CN1453562A (en) Output measuring system for medical ultrasonic equipment
CN1842851A (en) Holographic recoding method and device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20060517

Termination date: 20141107

EXPY Termination of patent right or utility model