CN108803012A - Method and fibre optic scanner in optical fiber scanning for correcting image distortion - Google Patents
Method and fibre optic scanner in optical fiber scanning for correcting image distortion Download PDFInfo
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- CN108803012A CN108803012A CN201810254392.2A CN201810254392A CN108803012A CN 108803012 A CN108803012 A CN 108803012A CN 201810254392 A CN201810254392 A CN 201810254392A CN 108803012 A CN108803012 A CN 108803012A
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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
- G02B26/103—Scanning systems having movable or deformable optical fibres, light guides or waveguides as scanning elements
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Abstract
The invention discloses the methods that correcting image distortion is used in optical fiber scanning, the optical fiber scanning scans for grid type, it is vibrated, is vibrated along the y direction perpendicular with the directions x by slow axis driver driving optical fiber, the method includes in the x-direction by fast axle driver driving optical fiber：A response in y-direction is superimposed on fast axle driver or slow axis driver so that the response caused by fast axle driving in y-direction is offset in the response of the superposition in y-direction.By introducing the amount opposite with the response caused by fast axle driving in y-direction, so that it is generated cancellation effect, cancel out each other with being responded outside the plane of fast axle, so that the response of fast axle is horizontal straight line, image display area is the rectangle of rule at this time, i.e., responds and corrected outside plane.It realizes and scanning track is accurately controlled, promote the display resolution and performance of scan image.
Description
Technical field
The present invention relates to the methods that correcting image distortion is used in optical fiber scanning technical field more particularly to optical fiber scanning.
Background technology
Existing fibre optic scanner scanning head structure mainly has cylinder four to divide quadrant pipe, rectangular piezoelectric ceramic piece etc., can
To be easily achieved grid type (X-Y types) scanning.But in practical work process, it can be led due to processing, adjustment, driving etc.
Cause speed axle response out of plumb, especially fiber work in resonance region, it is non-linear strong, since assembly method, fiber geometries lack
The comprehensive functions such as sunken, nonlinear response so that optical fiber is soon, the dynamic response of slow axis is mutually coupled (causes outside non-driven plane
Response), when leading to that fast axle is operated alone, the track of optical fiber is oval or inclined straight line, causes the distortion of display image, this
Kind pattern distortion, which is mentioned, is corrected by algorithm into angled straight lines, i.e., is corrected by the way of changing driving, but due to speed
Axis frequency phase-difference great disparity, though this correction solution is feasible, the driving voltage that it is needed is bigger than normal, and influences the resolution of scan image
Rate.
Invention content
The present invention provides the method and scanner structure for correcting image distortion in optical fiber scanning, to show image
Region correction is regular rectangle.
Inventor has found that above-mentioned distortion is different from the optical distortion usually said, described herein is that whole image is aobvious
The deformation for showing region is not that exact vertical, rigging error, non-linear etc. are each since scanner makes two dimension driving caused by flaw
Image display area caused by kind factor is simultaneously non-rectangle, but such as parallelogram, ellipse irregular shape is presented.Its water
Square to scan line and non-rectilinear, but from the horizontal by the oblique line or elliptical arc of certain angle.It thereby results in
Image pixel grid is still uniform, does not influence contrast and clarity, but by whole image along some specific direction (water
When scan lines are oblique line) or certain specific directions (when horizontal scanning line is in camber line) progress " pullling ".It is abnormal in order to eliminate these
Become, the present invention corrects ellipse, angled straight lines etc. by the way of introducing the driving for eliminating distortion, by the change to driving
Response.
In order to achieve the above-mentioned object of the invention, first aspect present invention provides in optical fiber scanning for correcting image distortion
Method, the optical fiber scanning scan for grid type, are vibrated by fast axle driver driving optical fiber, are driven by slow axis in the x-direction
Dynamic device driving optical fiber is vibrated along the directions y perpendicular with the directions x, and the method includes：
A response in y-direction is superimposed on fast axle driver or slow axis driver so that the superposition is in y-direction
Response offset response in y-direction caused by fast axle driving.
When fiber-optic vibration is operated alone in fast axle driver, obtained scan line is expressed as：
Wherein AxFor the sweep amplitude in the directions x, fx is the driving frequency of fast axle driver, AxyExist for fast axle driving generation
Displacement amplitude on the directions y, φ are response of the response with fast axle driving in the x direction on the directions y caused by fast axle driving
Phase difference, the response of the superposition in y-direction are
From above-mentioned formula：
AxyWhen=0, the straight line for generating horizontal direction is operated alone in fast axle driver, and image is without above-described figure at this time
Distortion of image；
AxyWhen ≠ 0, if φ=0 or π, the scan line that generation is operated alone of fast axle driver is inclined straight line, is inclined
Rake angle and Ax、AxyRatio it is related；
AxyWhen ≠ 0, if φ is arbitrary value other than 0 or π, the scan line that fast axle driving generates is ellipse, elliptical long axis
It is related with φ values with the angle of horizontal direction, ovality then with Ax、AxyRatio it is related.
Thus, work as AxyWhen ≠ 0, by introducing the amount opposite with y-axis directional response
So that it is generated cancellation effect, cancel out each other with being responded outside the plane of fast axle, under the two collective effect, the response of fast axle is horizontal
Straight line, image display area is the rectangle of rule at this time, i.e., responds and corrected outside plane.Realize the accurate control to scanning track
System, promotes the display resolution and performance of scan image.
Further, described to be superimposed a response in y-direction on fast axle driver or slow axis driver and refer to：
There are one the driving portions that driving optical fiber vibrates in the directions y for tool on fast axle driver or slow axis driver, by adjusting the driving portion
Drive signal so that fast axle driver or slow axis driver are superimposed a sound in y-direction on the basis of original response
It answers.When i.e. fiber-optic vibration is operated alone in the driving portion, obtained scan line is expressed as：
Further, described to be superimposed a response in y-direction on fast axle driver and refer to：The fast axle is driven
Dynamic device is two-dimensional scan driver, by the signal for adjusting fast axle driver so that response of the fast axle driver on the former directions x
A response in y-direction is superimposed on the basis of remaining unchanged.Specifically, when making fibre optic scanner, fast axle scanner
This as two-dimensional scanner, can generate two with certain angle direction driving (in figure by taking 90 ° i.e. perpendicular drive as an example,
Scanner on chip before fast axle is replaced with a tubulose scanner), if indicating that fast axle generates width in the driving in the directions y with Ay
Degree can then be under the identical driving frequency of fast axle, rationally setting driving voltage so that response is on its direction y generatedIn this way, two-way interaction, it is the straight line of horizontal direction that can make its biosynthesis locus, is reached
The purpose of compensation.
Second aspect of the present invention provides a kind of fibre optic scanner, including：Optical fiber and scanner driver；Scanner driver,
It is fixed in cantilever fashion to support the optical fiber and optical fiber cantilever is driven to be moved along predetermined scanning track comprising described in driving
The fast axle driver that optical fiber cantilever vibrates in the x-direction drives the optical fiber cantilever to be vibrated along the directions y perpendicular to the directions x slow
Axis driver, the directions x and the directions y are each perpendicular to optical fiber cantilever, and the light beam of fiber guides light source transmitting simultaneously passes through optical fiber cantilever
Project the light beam in end；
There are one the drivers point that driving optical fiber vibrates in the directions y for tool on the fast axle driver or slow axis driver
Portion, by the drive signal for adjusting the driver branch so that fast axle driver or slow axis driver are on the basis of original response
The response of upper superposition one in y-direction so that the response of the superposition in y-direction is offset caused by fast axle driving in the directions y
On response；
Or, the fast axle driver is two-dimensional scan driver, by the signal for adjusting fast axle driver so that fast axle
Driver is superimposed a response in y-direction on the basis of the response on the former directions x remains unchanged so that this is superimposed upon y
The response caused by fast axle driving in y-direction is offset in response on direction.
Optionally, the fast axle driver drives optical fiber cantilever along one perpendicular to optical fiber cantilever including at least two
Direction vibration driver branch, and different driving device branch respectively drives optical fiber cantilever and vibrates in different directions；It is described
Slow axis driver include driver point that at least one driving optical fiber cantilever is vibrated along one perpendicular to the direction of optical axis
Portion.And it is further, when the first driver point that the driver branch of fast axle driver is vibrated by driving optical fiber cantilever along x-axis
When portion and driving optical fiber cantilever are constituted along the second driver branch that y-axis is vibrated, by the drive for adjusting the second driver branch
Dynamic signal so that fast axle driver is superimposed a response in y-direction on the basis of original response so that this is superimposed upon y
The response caused by fast axle driving in y-direction is offset in response on direction；When fast axle driver includes at least two driving light
When fine cantilever is along the third driver branch of non-x axis and the vibration of non-y-axis, passes through the third adjusted simultaneously described at least two and drive
The drive signal of device branch so that fast axle driver is superimposed one in the side y on the basis of the response on the former directions x remains unchanged
Upward response so that the response caused by fast axle driving in y-direction is offset in the response of the superposition in y-direction.And into
One step, the first driver branch, the second driver branch or third driver branch may each comprise at least one drive
The driving element that dynamic optical fiber cantilever is vibrated along one perpendicular to the direction of optical axis.
Optionally, the fast axle driver include at least one driving optical fiber cantilever along one perpendicular to optical fiber cantilever
The driver branch of direction vibration；The slow axis driver includes the driver branch that two driving optical fiber vibrates in the y-direction,
One of driver branch is for coordinating fast axle driver to realize grid type scanning, another driver branch is for passing through tune
Save the drive signal of the driver branch so that slow axis driver is superimposed on the basis of original response one in y-direction
Response so that the response caused by fast axle driving in y-direction is offset in the response of the superposition in y-direction.And it is further,
The driver branch that two driving optical fiber vibrate in the y-direction may each comprise at least one driving optical fiber cantilever and hang down along one
Directly in the driving element of the direction of optical axis vibration.
One or more technical solution in the embodiment of the present invention, at least has the following technical effect that or advantage：
By introducing the amount opposite with response in y-direction caused by fast axle driving, make its generation cancellation effect, and it is fast
It responds and cancels out each other outside the plane of axis, so that the response of fast axle is horizontal straight line, image display area is the square of rule at this time
It responds and is corrected outside shape, i.e. plane.It realizes and scanning track is accurately controlled, promote the display resolution and property of scan image
Energy.
Description of the drawings
Fig. 1 is the structural schematic diagram that the embodiment of a response in y-direction is superimposed in fast axle driver；
Fig. 2 is the structural schematic diagram that the embodiment of a response in y-direction is superimposed in slow axis driver；
Fig. 3 be using controller obtain distortion data and to the control signal of fast axle driver and/or slow axis driver into
The functional block diagram of row correction.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
The present invention provides the method and scanner structure for correcting image distortion in optical fiber scanning, to show image
Region correction is regular rectangle.
First aspect of the embodiment of the present invention provides the method for correcting image distortion, the optical fiber in optical fiber scanning and sweeps
It retouches and is scanned for grid type, vibrated in the x-direction by fast axle driver driving optical fiber, by slow axis driver driving optical fiber edge and x
The perpendicular directions the y vibration in direction, the method include：
A response in y-direction is superimposed on fast axle driver or slow axis driver so that the superposition is in y-direction
Response offset response in y-direction caused by fast axle driving.
When fiber-optic vibration is operated alone in fast axle driver, obtained scan line is expressed as：
Wherein AxFor the sweep amplitude in the directions x, fxFor the driving frequency of fast axle driver, AxyExist for fast axle driving generation
Displacement amplitude on the directions y, φ are response of the response with fast axle driving in the x direction on the directions y caused by fast axle driving
Phase difference, the response of the superposition in y-direction are
From above-mentioned formula：
AxyWhen=0, the straight line for generating horizontal direction is operated alone in fast axle driver, and image is without above-described figure at this time
Distortion of image；
AxyWhen ≠ 0, if φ=0 or π, the scan line that generation is operated alone of fast axle driver is inclined straight line, is inclined
Rake angle and Ax、AxyRatio it is related；
AxyWhen ≠ 0, if φ is arbitrary value other than 0 or π, the scan line that fast axle driving generates is ellipse, elliptical long axis
It is related with φ values with the angle of horizontal direction, ovality then with Ax、AxyRatio it is related.
Thus, work as AxyWhen ≠ 0, by introducing the amount opposite with y-axis directional response
So that it is generated cancellation effect, cancel out each other with being responded outside the plane of fast axle, so that the response of fast axle is horizontal straight line, schemes at this time
As the rectangle that display area is rule, i.e., responds and corrected outside plane.It realizes and scanning track is accurately controlled, promote scanning
The display resolution and performance of image.
Further, described to be superimposed a response in y-direction on fast axle driver or slow axis driver and refer to：
There are one the driving portions that driving optical fiber vibrates in the directions y for tool on fast axle driver or slow axis driver, by adjusting the driving portion
Drive signal so that fast axle driver or slow axis driver are superimposed a sound in y-direction on the basis of original response
It answers.When i.e. fiber-optic vibration is operated alone in the driving portion, obtained scan line is expressed as：
Further, described to be superimposed a response in y-direction on fast axle driver and refer to：The fast axle is driven
Dynamic device is two-dimensional scan driver, by the signal for adjusting fast axle driver so that response of the fast axle driver on the former directions x
A response in y-direction is superimposed on the basis of remaining unchanged.Specifically, when making fibre optic scanner, fast axle scanner
This as two-dimensional scanner, can generate two with certain angle direction driving (in figure by taking 90 ° i.e. perpendicular drive as an example,
Scanner on chip before fast axle is replaced with a tubulose scanner), if indicating that fast axle generates width in the driving in the directions y with Ay
Degree can then be under the identical driving frequency of fast axle, rationally setting driving voltage so that response is on its direction y generatedIn this way, two-way interaction, it is the straight line of horizontal direction that can make its biosynthesis locus, is reached
The purpose of compensation.
Second aspect of the present invention provides a kind of fibre optic scanner, as shown in Figure 1 and Figure 2, including：Optical fiber 1 and turntable driving
Device；Scanner driver, it is fixed in cantilever fashion to support the optical fiber and optical fiber cantilever is driven to be moved along predetermined scanning track,
It includes the fast axle driver 2 that the driving optical fiber cantilever vibrates in the x-direction, drives the optical fiber cantilever along perpendicular to the directions x
The vibration of the directions y slow axis driver 3, the directions x and the directions y be each perpendicular to optical fiber cantilever, and optical fiber 1 guides the light beam of light source transmitting
And the light beam is projected by the end of optical fiber cantilever；
There are one the drivers point that driving optical fiber vibrates in the directions y for tool on the fast axle driver 2 or slow axis driver 3
Portion, by the drive signal for adjusting the driver branch so that the base of fast axle driver 2 or slow axis driver 3 in original response
A response in y-direction is superimposed on plinth so that the response of the superposition in y-direction is offset caused by fast axle driving in the side y
Upward response；
Or, the fast axle driver 2 is two-dimensional scan driver, by the signal for adjusting fast axle driver 2 so that fast
Axis driver 2 is superimposed a response in y-direction on the basis of the response on the former directions x remains unchanged so that the superposition
The response caused by fast axle driving in y-direction is offset in response in y-direction.
Fixed support optical fiber refers to that scan actuator is projected with optical fiber by dipped beam to the scan actuator in cantilever fashion
The part at end is fixedly connected, and the light beam ejecting end of optical fiber exceeds the end of scan actuator, and optical fiber cantilever is optical fiber beyond sweeping
Retouch the part of actuator.
In some embodiments of the present invention, the light source includes luminescence unit and for by the light beam coupling of luminescence unit
Into the beam coupling system of optical fiber.As typical embodiment, the luminescence unit includes emitting red light unit, green emitting
Unit and blue-light-emitting unit, beam coupling system are used for emitting red light unit, green emitting unit and blue-light-emitting unit
The light beam coupling sent out is into optical fiber.By controlling emitting red light unit, green emitting unit and the output of blue-light-emitting unit respectively
Energy hole coupling after light color.
In some embodiments of the present invention, the slow axis driver 3 and fast axle driver 2 are along the two of optical axis direction
End is respectively fixing end and free end, and the fixing end of the slow axis driver 3 is fixedly mounted, and is such as fixedly installed in a branch
On seat, the fixing end of fast axle driver 2 is fixedly connected with the free end of slow axis driver 3, and optical fiber is fixedly installed in fast axle driving
The free end of device, and free end of the end of optical fiber beyond fast axle driver forms optical fiber cantilever.To slow axis driver from
It is vibrated in the y-direction by holding, the free end of fast axle driver vibrates in the x-direction.
The slow axis driver 3 and fast axle driver 2 may each comprise piezoelectric actuator, electrostrictive actuator or mangneto
It is one or more in all kinds of actuating elements that expansion actuator etc. is driven by electric signal.
The structure of slow axis driver 3 and fast axle driver 2 is illustrated by taking piezoelectric actuator as an example below, electrostriction
The structure of other actuating elements driven by electric signal such as actuator or magnetic deformation actuator also can be similarly according to following institute
The structure for the piezoelectric actuator stated is configured, this is clear to those skilled in the art and is easy to implement.
Specifically, the slow axis driver 3 and fast axle driver 2 may each comprise bimorph or piezoelectric ceramic tube
Or it is one or more in piezoelectric ceramic piece driving vibrating device.
For the bimorph, each bimorph is a slow axis driver 3 or fast axle driver 2
Driver branch, can drive optical fiber along one perpendicular to optical fiber cantilever direction vibrate.
For piezoelectric ceramic tube, the piezoelectric ceramic tube radially polarizes, and the inner wall of piezoelectric ceramic tube is coated with
The outside of the interior electrode of the entire inner wall of one layer of covering, tubular body is coated at least a pair of of external electrode, and each pair of electrode includes
The absolute electrode that it axial symmetry setting that two mutual, is axially extended.Each pair of external electrode constitutes one with tubular body and interior electrode
The driver branch of slow axis driver 3 or fast axle driver 2, can drive optical fiber to shake perpendicular to the direction of optical fiber cantilever along one
It is dynamic.
For piezoelectric ceramic piece drive vibrating device for, the piezoelectric ceramic piece driving vibrating device include ontology and
In at least a pair of of piezoelectric ceramic piece that the outer surface of ontology is arranged, each pair of piezoelectric ceramic piece drives ontology along one perpendicular to ontology
The direction of central shaft vibrates.Each pair of piezoelectric ceramic piece is arranged about the central shaft axial symmetry of ontology, each piezoelectric ceramic piece
Extend along thickness polarization, along body central axis direction.At work to each pair of piezoelectric ceramic piece, wherein a piece of piezoelectric ceramics
Piece axially contracts under voltage driving, another piezoelectric ceramic piece is axially elongated under voltage driving, to drive ontology
It is curved toward the side of piezoelectric ceramic piece shunk, after the voltage that two panels piezoelectric ceramic piece applies changes polarity, ontology is toward another
Lateral bending turns, to which under the driving of buckling voltage, ontology is by each pair of piezoelectric ceramic piece drives edge one perpendicular to the direction of central shaft
Vibration.Each pair of piezoelectric ceramic piece constitutes the driver branch of a slow axis driver 3 or fast axle driver 2 with ontology, can drive
Dynamic optical fiber is vibrated along one perpendicular to the direction of optical fiber cantilever.
Further, in some embodiments of the present invention, the fast axle driver 2 includes that at least two driving optical fiber are outstanding
The driver branch that arm is vibrated along one perpendicular to the direction of optical fiber cantilever, and different driving device branch respectively drives optical fiber cantilever
It vibrates in different directions；The slow axis driver 3 is including at least one driving optical fiber cantilever along one perpendicular to optical fiber light
The driver branch of the direction vibration of axis.As described above, each driver branch may each comprise bimorph, piezoelectricity
Ceramic tube and piezoelectric ceramic piece drive any one or more in vibrating device.
And it is further, as shown in Figure 1, the driver branch when fast axle driver 2 is shaken by driving optical fiber cantilever along x-axis
When dynamic the first driver branch 201 and driving optical fiber cantilever is constituted along the second driver branch 202 that y-axis is vibrated, pass through tune
Save the drive signal of the second driver branch so that fast axle driver 2 is superimposed one in the directions y on the basis of original response
On response so that response in y-direction caused by fast axle driving is offset in the response of the superposition in y-direction.
And when fast axle driver 2 drives optical fiber cantilevers along non-x axis and the third driver of non-y-axis vibration including at least two
When branch, by the drive signal for adjusting the third driver branch described at least two simultaneously so that fast axle driver 2 is in original
The response of superposition one in y-direction on the basis of response on the directions x remains unchanged so that the sound of the superposition in y-direction
Response in y-direction caused by fast axle driving should be offset.And further, the first driver branch, second drive
Dong Qi branches or third driver branch may each comprise at least one driving optical fiber cantilever along one perpendicular to the side of optical axis
To the driving element of vibration.
In other embodiments of the present invention, as shown in Fig. 2, the fast axle driver 2 includes at least one driving light
The driver branch that fine cantilever is vibrated along one perpendicular to the direction of optical fiber cantilever；The slow axis driver 3 includes two drives
The driver branch that dynamic optical fiber vibrates in the y-direction, one of driver branch 301 is for coordinating fast axle driver 2 to realize grid
Format scans, another driver branch 302 is used for the drive signal by adjusting the driver branch so that slow axis driver
3 responses of superposition one in y-direction on the basis of original response so that fast axle is offset in the response of the superposition in y-direction
Response caused by driving in y-direction.And driver further, that the two driving optical fiber vibrates in the y-direction
Branch may each comprise the driving element that at least one driving optical fiber cantilever is vibrated along one perpendicular to the direction of optical axis.As above
Described, each driver branch may each comprise bimorph, piezoelectric ceramic tube and piezoelectric ceramic piece driving vibration dress
Any one or more in setting.
The fibre optic scanner further includes controller, controller respectively with light source, fast axle driver 2 and slow axis driver
3 electrical connections, for according to the corresponding scanning duration of each effective scanning pixel of its storage inside, control light source emergent ray and
Control signal is applied to fast axle driver 2 and slow axis driver 3.
It is further preferred that the fibre optic scanner further includes image follower, it is electrically connected, is used for the controller
Predetermined scan image signal is exported to controller, controller is according to predetermined scan image signal control light source, the fast axle driver 2
The corresponding predetermined scan image of the predetermined scan image signal is exported in a manner of by optical fiber scanning with slow axis driver 3.
Still more preferably, the fibre optic scanner further includes image collecting device, is electrically connected with the controller,
It acquires the projected image of optical fiber scanning output, controller will the collected projected image and the predetermined scan image into
Row comparison, obtains projected image distortion data；And it is calculated according to projected image distortion data and is used to be applied to fast axle after correcting
The control signal of driver 2 and/or slow axis driver 3, and the control signal after correction is applied to fast axle driver 2
And/or slow axis driver 3.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference mark between bracket should not be configured to limitations on claims.Word "comprising" or " comprising " are not arranged
Except there are element or steps not listed in the claims.Word "a" or "an" before element does not exclude the presence of more
A such element.In the unit claims listing several devices, several in these devices can be by same
One hardware branch embodies.The use of word first, second, and third does not indicate that any sequence, can be by these lists
Word is construed to title.
One or more technical solution in the embodiment of the present invention, at least has the following technical effect that or advantage：
By introducing the amount opposite with response in y-direction caused by fast axle driving, make its generation cancellation effect, and it is fast
It responds and cancels out each other outside the plane of axis, so that the response of fast axle is horizontal straight line, image display area is the square of rule at this time
It responds and is corrected outside shape, i.e. plane.It realizes and scanning track is accurately controlled, promote the display resolution and property of scan image
Energy.
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting
It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only
It is an example in a series of equivalent or similar characteristics.
The invention is not limited in specific implementation modes above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. the method in optical fiber scanning for correcting image distortion, the optical fiber scanning scans for grid type, is driven by fast axle
Device driving optical fiber is vibrated in the x-direction, is vibrated along the y direction perpendicular with the directions x by slow axis driver driving optical fiber, special
Sign is that the method includes：A response in y-direction is superimposed on fast axle driver or slow axis driver so that
The response caused by fast axle driving in y-direction is offset in the response of the superposition in y-direction.
2. the method in optical fiber scanning as described in claim 1 for correcting image distortion, which is characterized in that drive fast axle
When fiber-optic vibration is operated alone in device, obtained scan line is expressed as：
Wherein AxFor the sweep amplitude in the directions x, fxFor the driving frequency of fast axle driver, AxyBe fast axle driving generate in the directions y
On displacement amplitude, φ, which is response caused by fast axle driving on the directions y, drives the phase of response in the x direction with fast axle
Difference, the response of the superposition in y-direction are
3. the method in optical fiber scanning as claimed in claim 1 or 2 for correcting image distortion, which is characterized in that described
A response in y-direction is superimposed on fast axle driver or slow axis driver refers to：Fast axle driver or slow axis driver
There are one the driving portions that driving optical fiber vibrates in the directions y for upper tool, by the drive signal for adjusting the driving portion so that fast axle drives
Device or slow axis driver are superimposed a response in y-direction on the basis of original response.
4. the method in optical fiber scanning as claimed in claim 3 for correcting image distortion, which is characterized in that the driving
When fiber-optic vibration is operated alone in portion, obtained scan line is expressed as：
5. the method in optical fiber scanning as claimed in claim 1 or 2 for correcting image distortion, which is characterized in that described
A response in y-direction is superimposed on fast axle driver refers to：The fast axle driver is two-dimensional scan driver, is led to
Overregulate the signal of fast axle driver so that fast axle driver is superimposed one on the basis of the response on the former directions x remains unchanged
A response in y-direction.
6. a kind of fibre optic scanner, including：Optical fiber and scanner driver；Scanner driver is fixed in cantilever fashion to support the light
Fibre simultaneously drives optical fiber cantilever to be moved along predetermined scanning track comprising drives the optical fiber cantilever to vibrate in the x-direction fast
Axis driver, the slow axis driver for driving the optical fiber cantilever to be vibrated along the directions y perpendicular to the directions x, fiber guides light source hair
The light beam penetrated simultaneously projects the light beam by the end of optical fiber cantilever；It is characterized in that, the fast axle driver or slow axis drive
There are one the driver branches that driving optical fiber vibrates in the directions y for tool on dynamic device, by adjusting the drive signal of the driver branch,
So that fast axle driver or slow axis driver are superimposed a response in y-direction on the basis of original response so that this is folded
Add response in y-direction caused by response counteracting fast axle driving in y-direction；
Or, the fast axle driver is two-dimensional scan driver, by the signal for adjusting fast axle driver so that fast axle drives
Device is superimposed a response in y-direction on the basis of the response on the former directions x remains unchanged so that this is superimposed upon the directions y
On response offset response in y-direction caused by fast axle driving.
7. a kind of fibre optic scanner as claimed in claim 6, which is characterized in that the fast axle driver includes at least two
The driver branch that driving optical fiber cantilever is vibrated along one perpendicular to the direction of optical fiber cantilever, and different driving device branch is distinguished
Driving optical fiber cantilever vibrates in different directions；The slow axis driver includes that at least one driving optical fiber cantilever hangs down along one
Directly in the driver branch of the direction of optical axis vibration.
8. a kind of fibre optic scanner as claimed in claim 7, which is characterized in that when the driver branch of fast axle driver is by driving
The second driver branch structure that the first driver branch and driving optical fiber cantilever that dynamic optical fiber cantilever is vibrated along x-axis are vibrated along y-axis
Cheng Shi, by the drive signal for adjusting the second driver branch so that fast axle driver is superimposed on the basis of original response
One response in y-direction so that the sound caused by fast axle driving in y-direction is offset in the response of the superposition in y-direction
It answers；
When fast axle driver includes at least two driving optical fiber cantilevers along the third driver branch that non-x axis and non-y-axis are vibrated,
By the drive signal for adjusting the third driver branch described at least two simultaneously so that fast axle driver is on the former directions x
Response remain unchanged on the basis of one response in y-direction of superposition so that the response of the superposition in y-direction is offset fast
Response caused by axis driving in y-direction.
9. a kind of fibre optic scanner as claimed in claim 6, which is characterized in that the fast axle driver includes at least one
The driver branch for driving optical fiber cantilever to be vibrated perpendicular to the direction of optical fiber cantilever along one；The slow axis driver includes two
The driver branch that a driving optical fiber vibrates in the y-direction, one of driver branch is for coordinating fast axle driver to realize grid
Format scans, another driver branch is used for the drive signal by adjusting the driver branch so that slow axis driver exists
A response in y-direction is superimposed on the basis of original response so that fast axle driving is offset in the response of the superposition in y-direction
Caused response in y-direction.
10. a kind of fibre optic scanner as claimed in claim 9, which is characterized in that two driving optical fiber shake in the y-direction
Dynamic driver branch may each comprise the drive that at least one driving optical fiber cantilever is vibrated along one perpendicular to the direction of optical axis
Dynamic device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810254392.2A CN108803012A (en) | 2018-03-26 | 2018-03-26 | Method and fibre optic scanner in optical fiber scanning for correcting image distortion |
| PCT/CN2019/075483 WO2019184624A1 (en) | 2018-03-26 | 2019-02-19 | Method for correcting image distortion during optical fiber scanning, and optical fiber scanner |
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| CN201810254392.2A CN108803012A (en) | 2018-03-26 | 2018-03-26 | Method and fibre optic scanner in optical fiber scanning for correcting image distortion |
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| CN108803012A true CN108803012A (en) | 2018-11-13 |
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| CN111381363A (en) * | 2018-12-29 | 2020-07-07 | 成都理想境界科技有限公司 | Scanning driver and optical fiber scanner |
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| CN113741123A (en) * | 2020-05-28 | 2021-12-03 | 成都理想境界科技有限公司 | Projection correction method and optical fiber scanning imaging equipment |
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| WO2019184624A1 (en) | 2019-10-03 |
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Application publication date: 20181113 |