CN106526835A - Cascaded prism auxiliary light beam crude-and-fine two-stage scanning device - Google Patents
Cascaded prism auxiliary light beam crude-and-fine two-stage scanning device Download PDFInfo
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- CN106526835A CN106526835A CN201610934565.6A CN201610934565A CN106526835A CN 106526835 A CN106526835 A CN 106526835A CN 201610934565 A CN201610934565 A CN 201610934565A CN 106526835 A CN106526835 A CN 106526835A
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- prism
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- 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
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/108—Scanning systems having one or more prisms as scanning elements
Abstract
The invention relates to a cascaded prism auxiliary light beam crude-and-fine two-stage scanning device which is composed of a front prism system set and a second prism system set. The front prism system set is composed of a first prism and a second prism with the same wedge angle. The second prism system set is composed of a third prism and a fourth prism with the same wedge angle. The wedge angle of the first prism system set is different from that of the second prism system set. The refractive indexes of the two prisms of the first prism system set are different from that of two prisms of the second prism system set. In use, the prism system set with the relatively large wedge angle is arranged at a front portion, and the prism system set with the relatively small wedge angle is arranged at a back portion, or the prism system set with the relatively small wedge angle is arranged at the front portion, and the prism system set with the relatively large wedge block is arranged at the back portion. Rotation motion of the prism system set with the relatively large wedge angle can realize large-range crude scanning of the light beam, and rotation motion of the prism system set with the relatively small wedge angle can realize fine scanning of the light beam.
Description
Technical field
The present invention relates to optoelectronic scanning system, and in particular to a kind of to meet the level for requiring with high accuracy scanning on a large scale
The coarse-fine two-stage scan device of connection prism side beam.
Background technology
Rotation prism arrangement compact conformation, pointing accuracy are high, and light loss is little, and overall cost is little, without time dispersive effect,
In dynamic optical tracking have and have been widely used, can accurately realize the alignment of light path, the tracking of measurand, light beam sensing
Compensating approach of error etc..But in traditional double prism photoelectric follow-up, the following range and tracking accuracy of light beam are one
Index to mutual restriction.Degree of precision require application under, it is impossible to be provided simultaneously with a large scale with high accuracy feature.
（1）Application and the structure composition of rotary prism scanning means are given below in technology formerly.
First technology（Xiaodong Tao, etc., “Active optical system for variable view
imaging of micro objects with emphasis on kinematic analysis”, Applied
Optics, 2008, 47(22):4121-4132, waits serial article）Using rotation biprism realize the change visual field of speck body into
As scanning；First technology（Mario Tirabassi, etc., “Scanning LDV using wedge prisms”,
Optics and Lasers in Engineering, 2009, 47:454-460）Rotation biprism is used for into laser-Doppler
Fields of measurement；Rotation biprism is also applied to spiral microfabrication by other（C.T. Pan, “Dynamic
Characterization of silicon-based microstructure of high aspect ratio by
dual-prism UV laser system”, Sensors and Actuators A, 2005, 122, 45-54）, shearing
Interferometer beam orientation adjustment（G. Paez, etc., “Vectorial shearing interferometer,”
Applied Optics, 2000, 39, 5172-5178）, satellite optical communication terminal movement locus simulation and ground detection
（L.R. Liu, etc., Physical basis and corresponding instruments for PAT
performance testing of inter-satellite laser communication terminals.
Proceedings of SPIE-The International Society for Optical Engineering, 2006,
6304, 6304OC1-63040C11, Free-Space Laser Communications VI.）Etc. occasion.
First technology（The patents such as Zu Jifeng, application number：03129234.8, grant date on June 13rd, 2003）Propose to adopt
The different motion combination of rotation biprism is realized in the transmission of group of motors mate gear, realizes the requirement of analog satellite relative motion.But
It is that the motor combination drive scheme that is given and control system are more complicated, has that Motor drive precision influences each other and space arrangement is tired
Difficult the problems such as.
（2）Formerly technology gives the structure composition of the coarse-fine coupling scanning means of biprism below.
First technology（The patents such as Li Anhu, application number：201210439061.9, grant date on March 6th, 2013）Using rotation
The combination nested with beat motion of rotation movement structure, cleverly realizes the integrated of coarse-fine scan function in list covering device.
First technology（Anhu Li, etc., “Laser Coarse-fine Coupling Scanning Method
by Steering Double Prisms”, Applied Optics, 2012, 51(3):356-364）Propose using two
Torque motor is respectively coupled on biprism lens barrel, direct drive biprism rotation, realizes the coarse scanning of deflecting light beams；In coarse scan
On the basis of retouching, devise nesting and involve formula deflection mechanism, realize the orthogonal beat motion of biprism, it is possible to achieve essence is swept
Retouch.In fact, when design prism rotates the mechanism nested with beat, it should which the error for reducing two-stage motion as far as possible is passed
Pass, and the system is on the basis of rotary motion, involve formula beat method using three modules, it will produce more machineries
Error accumulation, so as to have influence on the precision of prism scanning.
First technology（Gilles Roy, etc., “Enhanced scanning agility using a double
pair of Risley prisms”, Applied Optics, 2015, 54 (34):10213-10226）Using two groups not
With the scheme of the prism pair coaxial rotating of the angle of wedge, large area scanning is realized.It is secondary preposition and one using the less prism of a pair of angles of wedge
The prism pair larger to the angle of wedge is rearmounted, and rearmounted prism pair is mainly used in expanding fore pair scope.The technology only gives two
The simulation pattern of group prism subscan, does not provide concrete implementation scheme, does not illustrate specific frame for movement yet.
The content of the invention
It is an object of the invention to provide a kind of cascade prism side beam coarse-fine two that can realize large scale and high accuracy scanning
Level scanning means.The present invention is respectively adopted four prism cascade arrangements and the mode together about the rotation of optical axis center line.Four ribs
Mirror is divided into two groups of before and after, and the rotary motion of one of which prism can realize the coarse scanning on a large scale of light beam, another set prism
Rotary motion can realize light beam essence scanning.Two groups of secondary rotary motions of cascade rotary prism realize coarse-fine the two of light beam
Class precision combine scan function, keep rotation biprism compact conformation, it is reliable and stable while, meet photoelectric tracking
On a large scale with high-precision application requirement.
It is proposed by the present invention to cascade the coarse-fine two-stage scan device of prism side beam, it is made up of two groups of prism systems of in front and back, the
One group of prism system is made up of angle of wedge identical prism one and prism two；Second group of prism system is by three He of angle of wedge identical prism
Prism four is constituted, and the angle of wedge of first group of prism system and second group of prism system is different；It is during use, larger using the wherein angle of wedge
One group of prism system is preposition, and the less one group of prism system of the angle of wedge is rearmounted；Or using the wherein less one group of prism system of the angle of wedge
Preposition, one group of larger prism system of the angle of wedge is rearmounted；The rotary motion of one group of larger prism system of the angle of wedge can realize light beam
Coarse scanning on a large scale, the rotary motion of the less one group of prism system of the angle of wedge can realize the essence scanning of light beam；
Before and after described in two groups of prism systems, two ribs in two prisms and the second prism system in the first prism system
The angle of wedge of mirror is different, and the refractive index of two in two in the first prism system prism and the second prism system prism is identical；
Or first two prisms in two prisms and the second prism system in prism system the angle of wedge it is identical, the first prism system
In two prisms and the second prism system in two prisms refractive index it is different；Or first two rib in prism system
The angle of wedge difference of two prisms in mirror and the second prism system, two in the first prism system prism and the second prism system
In two prisms refractive index it is different；
Described prism one is identical with the structure of prism two, including the first prism 15, the first picture frame 16, the first support 1, the first machine
Seat insert 2, the first deep groove ball bearing 3, the first nylon block 4, the first wedge shape back-up ring 5, the first threaded collar 6, clutch shaft bearing back-up ring
A8, clutch shaft bearing back-up ring B14, clutch shaft bearing back-up ring C7, the first electric rotating machine assembly and the first encoder assembly；First rotation
Rotating motor assembly is made up of the first rotary electric machine 9, the first electric rotating machine brush 10 and the first rotary motor rotor 11, described
First encoder assembly is made up of the first encoder probe 12 and the first encoder rotor 13；
First prism 15 is put in the first picture frame 16, and optical axis direction is fixed by the first wedge shape back-up ring 5, the first wedge shape back-up ring
5 be threaded connection by the first threaded collar 6 it is spacing.First prism, 15 both sides pass through six the first uniform nylon blocks 4 respectively
Contact with the first wedge shape back-up ring 5 and the first picture frame 16, prevent from damaging；First support insert 2 is threaded connection and is installed on first
On support 1, the outer ring of two the first deep groove ball bearings 3 is separately mounted in the first support insert 2 and the first support 1, and inner ring is all
It is placed on the first picture frame 16, clutch shaft bearing back-up ring is used in the outside of 2 junction of the first deep groove ball bearing 3 and the first support insert respectively
A8 and clutch shaft bearing back-up ring C7 are spacing, the outside clutch shaft bearing back-up ring of junction on the first deep groove ball bearing 3 and the first support 1
B14 is spacing；First encoder probe 12 is fixed on clutch shaft bearing back-up ring A8, and the first encoder rotor 13 is placed on clutch shaft bearing gear
On circle B14；First rotary electric machine 9 is threadably secured with the first support 1, the first rotary motor rotor 11 and the first picture frame
16, also by being screwed, have been passed on the first picture frame 16 by the rotary motion of the first rotary motor rotor 11 so as to about the z axis
Rotation, so as to drive the first prism 15 to rotate about the z axis；First encoder rotor 13 is connected with the first picture frame 16, is compiled by first
Interaction between code device probe 12 and the first encoder rotor 13 can measure the corner of the first prism 15 in real time；
Described prism three is identical with the structure of prism four, including the second prism 31, the second picture frame 32, and the second support 17, second
Support insert 18, the second deep groove ball bearing 19, the second nylon block 20, the second wedge shape back-up ring 21, the second threaded collar 22, the second axle
Hold back-up ring A24, second bearing back-up ring B30, second bearing back-up ring C23, the second electric rotating machine assembly and second encoder assembly；Institute
State the second prism 31 to be put in the second picture frame 32, optical axis direction is fixed by the second wedge shape back-up ring 21,21 quilt of the second wedge shape back-up ring
Second threaded collar 22 is threaded connection spacing；Second prism, 31 both sides respectively by six uniform second nylon blocks 20 with
Second wedge shape back-up ring 21 and the second picture frame 32 are contacted, and prevent from damaging；Second support insert 18 is threaded connection and is installed on second
On support 17, the outer ring of two the second deep groove ball bearings 19 is separately mounted in the second support insert 18 and the second support 17, interior
Circle is all placed on the second picture frame 32, and the second axle is used in the outside of 18 junction of the second deep groove ball bearing 19 and the second support insert respectively
Hold back-up ring A24 and second bearing back-up ring C23 is spacing, the outside of the second deep groove ball bearing 19 and 17 junction of the second support is used respectively
Back-up ring B30 is spacing for second bearing；Second encoder probe 28 is fixed on second bearing back-up ring A24, second encoder rotor 29
It is placed on second bearing back-up ring B30；Second rotary electric machine 25 is threadably secured with the second support 17, the second electric rotating machine
Rotor 27 has passed to the second mirror by the rotary motion of the second rotary motor rotor 27 with the second picture frame 32 also by being screwed
On frame 32 so as to rotate about the z axis, the second prism 31 is driven to rotate about the z axis.
In the present invention, described electric rotating machine type of drive can also be using in worm and gear, gear or Timing Belt etc.
Any one.
The ultimate principle for cascading the coarse-fine scanning means of rotary prism side beam of the present invention is as follows：
As shown in Figure 1, prism one and prism two are respectively along four prisms of optical axis direction, composition fore is secondary or rearmounted rib
Mirror pair；Prism three and prism four constitute rearmounted prism pair or fore pair.As shown in Figure 2, fore is secondary or rearmounted rib
Mirror pair can have four kinds of different arrangement forms：All planar side is all inwardly outwardly on the inclined-plane of two prisms；Two prisms it is flat
All inclined-plane side is all inwardly outwardly for surface side；One prism planes side outwardly inclined-plane side inwardly, the planar side of another prism inwardly, tiltedly
Surface side is outwardly；One prism hypotenuse/facet surfaces side outwardly planar side inwardly, outwardly, inclined-plane side is inwardly for the planar side of another prism.Prism
One and the angle of wedge of prism two beα 1；The angle of wedge of prism three and prism four isα 2.Four prisms can be independently rotated around optical axis, it is stipulated that
Counterclockwise just, to be negative clockwise, the anglec of rotation is respectively for prism direction of rotationθ 1、θ 2、θ 3Withθ 4。
Whereinα 1It is more than or less thanα 2, because little angle of wedge rotary prism group scanning accuracy rotates biprism better than the big angle of wedge
Scanning accuracy, and the sweep limitss under identical physical dimension are less than the latter, it is possible to swept with the different rotary prism pair of the angle of wedge
Imaging apparatus realize that large scale and high accuracy scanning is required.
When scanning is applied, coarse scanning first can be carried out with big angle of wedge prism group, then local essence is carried out with little angle of wedge prism group
Scanning；Smart scanning, then the scope that with big angle of wedge prism group expand essence scanning can be carried out with little angle of wedge prism group first；Can also be thick
Essence is scanned simultaneously.During scanning, the angular velocity of four prisms is respectively provided with, different angular velocity can make scanning means with different
Pattern trace is scanned.
The technological merit of the present invention：
1. it is in the present invention, preposition different with the angle of wedge of rearmounted prism group, wherein the rotation of big angle of wedge rotary prism group can be realized
The coarse scanning of dynamic beam requires that the rotation of little angle of wedge rotary prism group can realize that the essence scanning of dynamic beam is required, therefore
Two pairs of prism secondary combinations can realize that coarse-fine two-stage combines scanning, can apply to large scale and high accuracy optical tracking occasion.
2. in the present invention, the rotation of four prisms is separate, arbitrarily there are no coupled motions between the two, thus appoints
The rotation of one prism of meaning will not produce impact to other prisms.
3., in the present invention, four described prisms are driven by torque motor respectively realizes that circle rotates on a large scale, is
Self-movement form, both can be with synchronous rotary, it is also possible to rotated with different rotating speeds.
4., in the present invention, the rotary motion of each prism is assembled with encoder, can in real time measuring prism reality turn
Angle, using closed loop control, is corrected to the error of the anglec of rotation in real time, is further increased the precision of system.
5. in the present invention, the machinery such as prism, wedge shape back-up ring, picture frame, threaded collar, motor, encoder, bearing and support
Structure install compact, it is reliable and stable.
Description of the drawings
Fig. 1 is cascade connection type rotary prism of the present invention secondary four prisms showing around optical axis center line Z axis rotary motion
It is intended to.
Fig. 2 is four kinds of secondary different arrangement forms of prism of the present invention.Wherein：（a）It is relative for planar side；（b）For inclined-plane side
Relatively；（c）For first prism hypotenuse/facet surfaces side inwardly, the planar side of another prism is inwardly；（d）For first prism planes side court
In, the inclined-plane side of another prism is inwardly.
Fig. 3 is the overall construction drawing of the coarse-fine scanning means of present invention cascade prism side beam.
Fig. 4 is the structure chart of a prism system of fore group of the present invention.Wherein：（a）For front view,（b）For A-A
Sectional view.
Fig. 5 is the structure chart of a prism system of rearmounted prism group of the invention.Wherein：（a）For front view,（b）For B-B
Sectional view.
Fig. 6 is the structure chart of the first prism of the invention.Wherein：（a）For front view,（b）For left view.
Fig. 7 is the structure chart of the second prism of the invention.Wherein：（a）For front view,（b）For left view.
Fig. 8 is the first stand structure figure of the present invention.Wherein：（a）For front view,（b）For full sectional view.
Fig. 9 is the first support insert structure figure of the present invention.Wherein：（a）For front view,（b）For full sectional view.
Figure 10 is the first frame structure figure of the present invention.Wherein：（a）For front view,（b）For full sectional view.
Figure 11 is the first wedge shape back-up ring of the present invention.Wherein：（a）For front view,（b）For full sectional view.
Figure 12 is first threaded collar of the present invention.Wherein：（a）For front view,（b）For top view.
Figure 13 is the schematic diagram of the coarse scanning of known circular track and the essence scanning of local feature track.
Label in figure：1 first support, 2 first support inserts, 3 first deep groove ball bearings, 4 first nylon blocks, 5 first wedges
Shape back-up ring, 6 first threaded collars, 7 clutch shaft bearing back-up ring C, 8 clutch shaft bearing back-up ring A, 9 first rotary electric machines, 10 first rotations
Rotating motor brush, 11 first rotary motor rotors, 12 first encoders probe, 13 first encoder rotors, 14 clutch shaft bearings gear
Circle B, 15 first prisms, 16 first picture frames, 17 second supports, 18 second support inserts, 19 second deep groove ball bearings, 20 second Buddhist nuns
Imperial block, 21 second wedge shape back-up rings, 22 second threaded collars, 23 second bearing back-up ring C, 24 second bearing back-up ring A, 25 second rotations
Motor stator, 26 second electric rotating machine brushes, 27 second rotary motor rotors, 28 second encoders probe, 29 second encoders
Rotor, 30 second bearing back-up ring B, 31 second prisms, 32 second picture frames.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings, but scope of patent protection not limited to this of the present invention.
Referring to accompanying drawing 3, four described prism systems are connected by screw on base, form a cascade prism
The coarse-fine scanning means of side beam.The installation method not limited to this of four prism systems, it is also possible on slide unit, it is convenient to adjust
The distance between each prism.
Referring to accompanying drawing 4, it is a prism system of fore group（Prism one or prism two system）, first rib
Mirror 15 is placed in the second picture frame 16, and optical axis direction is fixed by the first wedge shape back-up ring 5, and the first wedge shape back-up ring 5 is kept off by the first screw thread
Circle 6 is threaded connection spacing.First prism, 15 both sides pass through six the first uniform nylon blocks 4 and the first wedge shape back-up ring respectively
5 and first picture frame 16 contact, prevent damage.First rotary electric machine 9 is threadably secured with the first support 1, the first rotation
With the first picture frame 16 also by being screwed, the rotary motion of such first rotary motor rotor 11 has passed to rotor 9
On one picture frame 16 so as to rotate about the z axis, the first prism 15 is driven to rotate about the z axis.First support insert 2 is threaded connection peace
It is mounted on the first support 1, the outer ring of two the first deep groove ball bearings 3 is separately mounted to the first support insert 2 and the first support 1
On, inner ring is all enclosed within the first picture frame 16, and outside uses clutch shaft bearing back-up ring A8, clutch shaft bearing back-up ring B14 and clutch shaft bearing respectively
Back-up ring C7 is spacing.First encoder probe 12 is fixed on clutch shaft bearing back-up ring A8, and the first encoder rotor 13 is enclosed within first axle
Hold on back-up ring B14.
Referring to accompanying drawing 5, structure is consistent with accompanying drawing 3 herein, but the prism angle of wedge is different, is a prism system of rearmounted prism group
System（Four system of prism three or prism）, the second prism 31 is placed in the second picture frame 32, and optical axis direction passes through the second wedge shape back-up ring
21 fix, and the second wedge shape back-up ring 21 is threaded connection spacing by the second threaded collar 22.Second prism, 31 both sides pass through respectively
Six the second uniform nylon blocks 20 are contacted with the second wedge shape back-up ring 21 and the second picture frame 32, prevent from damaging.Second electric rotating machine
Stator 25 is threadably secured with the second support 17, the second rotary motor rotor 27 and the second picture frame 32 also by being screwed,
The rotary motion of such second rotary motor rotor 27 has been passed on the second picture frame 32 so as to rotated about the z axis, drives the second prism
31 rotate about the z axis.Second support insert 18 is threaded connection on the second support 17, two the second deep groove ball bearings 19
Outer ring be separately mounted in the second support insert 18 and the second support 17, inner ring is all enclosed within the second picture frame 32, outside difference
It is spacing with second bearing back-up ring A24, second bearing back-up ring B30 and second bearing back-up ring C23.Second encoder probe 28 is fixed on
On second bearing back-up ring A24, second encoder rotor 29 is enclosed within second bearing back-up ring B30.
The first prism 15, second is respectively referring to accompanying drawing 6, accompanying drawing 7, accompanying drawing 8, accompanying drawing 9, accompanying drawing 10, accompanying drawing 11, accompanying drawing 12
Prism 31, the first support 1, the first support insert 2, the first picture frame 16, the first wedge shape back-up ring 5, the structure of the first threaded collar 6
Figure.
Referring to accompanying drawing 13, it is known that certain circular trace（In the sweep limitss of first pair of prism）, such as global figure C institutes in figure
Show, obtained to realize that the first couple required for the whole scan track rotates biprism rotation curve by reverse solution, control the
A pair of biprism can be scanned by the anglec of rotation curve and obtain circular trace C, and this is coarse scanning on a large scale；Scheme in the overall situation
In take Local map D（In second pair of prism sweep limits）, obtain to realize the partial sweep track again by Converse solved
The secondary anglec of rotation curve of second pair of required prism, second pair of prism pair of control can obtain the local by the rotation curve
Scanning track D, is small range essence scanning.By coarse scanning system and the motion switching of smart scanning system, overall situation track is capable of achieving
Coarse scanning and local feature track essence scanning.
The example that the present invention is applied in a scan is the foregoing is only, for those skilled in the art come
Say, the present invention there can be various modifications and variations.All any modifications within the spirit and principles in the present invention, made, equivalent
Replace, improve etc., should be included within the scope of the present invention.
Claims (2)
1. the coarse-fine two-stage scan device of prism side beam is cascaded, it is characterised in that be made up of two groups of prism systems of in front and back, first group
Prism system is made up of angle of wedge identical prism one and prism two；Second group of prism system is by angle of wedge identical prism three and prism
The angle of wedge of four compositions, first group of prism system and second group of prism system is different；During use, using larger one group of the wherein angle of wedge
Prism system is preposition, and the less one group of prism system of the angle of wedge is rearmounted；Or it is preposition using the wherein less one group of prism system of the angle of wedge,
One group of larger prism system of the angle of wedge is rearmounted；The rotary motion of one group of larger prism system of the angle of wedge can realize the big model of light beam
Coarse scanning is enclosed, the rotary motion of the less one group of prism system of the angle of wedge can realize the essence scanning of light beam；
Before and after described in two groups of prism systems, two ribs in two prisms and the second prism system in the first prism system
The angle of wedge of mirror is different, and the refractive index of two in two in the first prism system prism and the second prism system prism is identical；
Or first two prisms in two prisms and the second prism system in prism system the angle of wedge it is identical, the first prism system
In two prisms and the second prism system in two prisms refractive index it is different；Or first two rib in prism system
The angle of wedge difference of two prisms in mirror and the second prism system, two in the first prism system prism and the second prism system
In two prisms refractive index it is different；
Described prism one is identical with the structure of prism two, including the first prism (15), the first picture frame (16), and the first support (1),
First support insert (2), the first deep groove ball bearing (3), the first nylon block (4), the first wedge shape back-up ring (5), the first threaded collar
(6), clutch shaft bearing back-up ring A (8), clutch shaft bearing back-up ring B (14), clutch shaft bearing back-up ring C (7), the first electric rotating machine assembly and
One encoder assembly；The first electric rotating machine assembly by the first rotary electric machine (9), the first electric rotating machine brush (10) and
First rotary motor rotor (11) is constituted, and the first encoder assembly is popped one's head in (12) by the first encoder and the first encoder turns
Sub (13) composition；
First prism (15) is put in the first picture frame (16), and optical axis direction is fixed by the first wedge shape back-up ring (5), first wedge
Shape back-up ring (5) is threaded connection spacing by the first threaded collar (6)；First prism (15) both sides are uniform by six respectively
First nylon block (4) is contacted with the first wedge shape back-up ring (5) and the first picture frame (16), prevents from damaging；First support insert (2) passes through
Threaded connection is installed on the first support (1), and the outer ring of two the first deep groove ball bearings (3) is separately mounted to the first support insert
(2) on and the first support (1), inner ring is all placed on the first picture frame (16), the first deep groove ball bearing (3) and the first support insert
(2) outside of junction uses clutch shaft bearing back-up ring A (8) and clutch shaft bearing back-up ring C (7) spacing respectively, the first deep groove ball bearing (3)
It is spacing with clutch shaft bearing back-up ring B (14) with the outside of junction on the first support (1)；First encoder probe (12) is fixed on the
On one end ring A (8), the first encoder rotor (13) is placed on clutch shaft bearing back-up ring B (14)；First rotary electric machine
(9) it is threadably secured with the first support (1), the first rotary motor rotor (11) is solid also by screw thread with the first picture frame (16)
It is fixed, passed on the first picture frame (16) by the rotary motion of the first rotary motor rotor (11) so as to rotate about the z axis, so as to
The first prism (15) is driven to rotate about the z axis；First encoder rotor (13) is connected with the first picture frame (16), by the first encoder
Interaction between probe (12) and the first encoder rotor (13) can measure the corner of the first prism (15) in real time；
Described prism three is identical with the structure of four system of prism, including the second prism (31), the second picture frame (32), the second support
(17), the second support insert (18), the second deep groove ball bearing (19), the second nylon block (20), the second wedge shape back-up ring (21), second
Threaded collar (22), second bearing back-up ring A (24), second bearing back-up ring B (30), second bearing back-up ring C (23), the second electric rotating
Machine assembly and second encoder assembly；Second prism (31) is put in the second picture frame (32), and optical axis direction passes through the second wedge
Shape back-up ring (21) is fixed, and the second wedge shape back-up ring (21) is threaded connection spacing by the second threaded collar (22)；Second prism
(31) both sides are contacted with the second wedge shape back-up ring (21) and the second picture frame (32) by six uniform the second nylon blocks (20) respectively,
Prevent from damaging；Second support insert (18) is threaded connection and is installed on the second support (17), two the second deep groove ball bearings
(19) outer ring is separately mounted on the second support insert (18) and the second support (17), and inner ring is all placed on the second picture frame (32)
On, the outside of the second deep groove ball bearing (19) and the second support insert (18) junction use respectively second bearing back-up ring A (24) and
Second bearing back-up ring C (23) is spacing, and the outside of the second deep groove ball bearing (19) and the second support (17) junction is respectively with second
End ring B (30) is spacing；Second encoder probe (28) is fixed in second bearing back-up ring A (24), second encoder rotor
(29) it is placed in second bearing back-up ring B (30)；Second rotary electric machine (25) is threadably secured with the second support (17), the
Two rotary motor rotors (27) with the second picture frame (32) also by being screwed, by the rotation of the second rotary motor rotor (27)
Motion has been passed on the second picture frame (32) so as to rotated about the z axis, drives the first prism (31) to rotate about the z axis.
2. device according to claim 1, it is characterised in that the type of drive can also adopt snail except electric rotating machine
In worm and gear, gear or Timing Belt any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934565.6A CN106526835A (en) | 2016-11-01 | 2016-11-01 | Cascaded prism auxiliary light beam crude-and-fine two-stage scanning device |
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| CN201610934565.6A CN106526835A (en) | 2016-11-01 | 2016-11-01 | Cascaded prism auxiliary light beam crude-and-fine two-stage scanning device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110031949A (en) * | 2019-04-19 | 2019-07-19 | 同济大学 | A kind of rotating mirror system of single power source driving polygon prism |
| CN110500990A (en) * | 2019-07-09 | 2019-11-26 | 同济大学 | A kind of six degree of freedom measuring system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020062718A1 (en) * | 2018-09-30 | 2020-04-02 | SZ DJI Technology Co., Ltd. | Optical scanning device with beam compression and expansion |
| CN109633853A (en) * | 2018-12-25 | 2019-04-16 | 同济大学 | A kind of self-cleaning rotating prism apparatus |
| CN109633853B (en) * | 2018-12-25 | 2020-11-27 | 同济大学 | Self-cleaning rotary prism device |
| CN109633895A (en) * | 2019-01-11 | 2019-04-16 | 同济大学 | A kind of scan method cascading the coarse-fine two-stage scan device of prism side beam |
| CN110031949A (en) * | 2019-04-19 | 2019-07-19 | 同济大学 | A kind of rotating mirror system of single power source driving polygon prism |
| CN110031949B (en) * | 2019-04-19 | 2020-08-18 | 同济大学 | Rotating mirror system for driving polygon prism by single power source |
| WO2020237500A1 (en) * | 2019-05-28 | 2020-12-03 | 深圳市大疆创新科技有限公司 | Ranging apparatus and method for controlling scanning field of view thereof |
| CN112313531A (en) * | 2019-05-28 | 2021-02-02 | 深圳市大疆创新科技有限公司 | Distance measuring device and control method for scanning view field thereof |
| CN110500990A (en) * | 2019-07-09 | 2019-11-26 | 同济大学 | A kind of six degree of freedom measuring system and method |
| CN110500990B (en) * | 2019-07-09 | 2020-08-18 | 同济大学 | Six-degree-of-freedom measurement system and method |
| CN111880282A (en) * | 2020-07-31 | 2020-11-03 | 同济大学 | Coarse and fine adjusting device for large-range optical axis |
| CN112433362A (en) * | 2020-11-02 | 2021-03-02 | 湖南宇正智能科技有限公司 | Laser beam expanding scanning device and method using Risley prism |
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