CN110095863A - A kind of optical tomography scanning means - Google Patents
A kind of optical tomography scanning means Download PDFInfo
- Publication number
- CN110095863A CN110095863A CN201910479347.1A CN201910479347A CN110095863A CN 110095863 A CN110095863 A CN 110095863A CN 201910479347 A CN201910479347 A CN 201910479347A CN 110095863 A CN110095863 A CN 110095863A
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- Prior art keywords
- magnetic control
- control coil
- vibrating shaft
- paraboloid
- focus lamp
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- 230000003287 optical effect Effects 0.000 title claims abstract description 29
- 238000003325 tomography Methods 0.000 title claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 12
- 230000004075 alteration Effects 0.000 abstract description 7
- 239000000835 fiber Substances 0.000 abstract description 4
- 238000003384 imaging method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 230000001427 coherent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012014 optical coherence tomography Methods 0.000 description 2
- 230000009885 systemic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- 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
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
-
- 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
- G02B26/12—Scanning systems using multifaceted mirrors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
The present invention discloses a kind of optical tomography scanning means, including installation shell, fibre-optical splice, fixed paraboloid focus lamp, Y-direction paraboloid of revolution focus lamp, Y-direction vibrating shaft and the Y-direction magnetic control coil being installed on the installation shell；The diverging light of the fibre-optical splice output is converged to collimated light beam by the fixed paraboloid focus lamp, and the optical axis holding of the fixed paraboloid focus lamp and the Y-direction paraboloid of revolution focus lamp is on the same line；The Y-direction magnetic control coil drive Y-direction vibrating shaft, and then Y-direction paraboloid of revolution focus lamp is driven to be focused into hot spot on scanned object, since fiber-optic output does not use the fiber optic collimator mirror of spherical surface or aspheric lens structures, light beam focusing does not use lens mode yet, avoids aberration caused by lens.
Description
Technical field
The invention belongs to Optical Coherence Tomography Imaging Technology fields, and in particular to a kind of optical tomography scanning means.
Background technique
Optical Coherence Tomography Imaging Technology obtains the chromatography ability of depth direction based on low-coherent light principle of interference, by sweeping
Reconstruct biological tissue or material internal structure are retouched, signal contrast is derived from biological tissue or material internal optical reflection (scattering)
The spatial variations of characteristic, optical scanner is particularly significant for imaging results, and the aberration of scanning optical path directly affects imaging point
Resolution.
Existing scanning means realizes the scanning of both direction using mutually orthogonal rotating electric machine, then saturating by focusing
Mirror focuses light beam, realizes the scanning to scanned object.For the wideband light source in optical coherent chromatographic imaging field, focus
The aberration effects of lens systemic resolution.
Summary of the invention
In view of the above problem existing for existing imaging scanner, the present invention is intended to provide a kind of compact-sized, work
Reliable optical tomography scanning means.
The technical solution adopted by the present invention to solve the technical problems is: a kind of optical tomography scanning means, including
Shell is installed, fibre-optical splice, fixed paraboloid focus lamp, the Y-direction paraboloid of revolution being installed on the installation shell focus
Mirror, Y-direction vibrating shaft and magnetic control coil；The diverging light of the fibre-optical splice output is assembled by the fixed paraboloid focus lamp
At collimated light beam, the optical axis of the fixed paraboloid focus lamp and the Y-direction paraboloid of revolution focus lamp is maintained at always
On line；The Y-direction vibrating shaft drives Y-direction paraboloid of revolution focus lamp on scanned object by Y-direction magnetic control coil
It is focused into hot spot, and realizes a direction scanning.
Further, optical tomography scanning means further include be mounted on installation shell on X-direction plane mirror,
X-direction vibrating shaft and X-direction magnetic control coil；The convergent beam that the Y-direction paraboloid of revolution focus lamp focuses is using the X
Direction plane reflecting mirror, the X-direction magnetic control coil drive X-direction vibrating shaft drive the X-direction plane mirror being swept
Another direction on object is retouched to scan.
Further, the Y-direction vibrating shaft and the Y-direction magnetic control coil of stating are equipped with gap；The X-direction vibrating shaft
Gap is equipped with the X-direction magnetic control coil.
Further, the Y-direction vibrating shaft is set to the balance middle position of the Y-direction magnetic control coil；Institute
State the middle position that X-direction vibrating shaft is set to the balance of the X-direction magnetic control coil.
Further, the Y-direction vibrating shaft and X-direction vibrating shaft are orthogonal.
Further, the shaft section of the X-direction vibrating shaft and the Y-direction vibrating shaft is asymmetric.
Further, the magnetic control coil includes magnetic core, magnetic control coil and controllable current source；Four magnetic poles of the magnetic core
Around two magnetic control coils, the magnetic control coil is divided into two groups and is driven by respective controllable current source, outside the magnetic control coil
Portion connects the controllable current source.
Further, the magnetic control coil includes two group of first magnetic control coil and the second magnetic control coil；The controllable current
Source includes the first controllable current source for driving the first magnetic control coil and the second controllable electric for driving the second magnetic control coil
Stream source.
Compared with prior art, the beneficial effects of the present invention are: the present apparatus is mounted in single installation shell, make
Apparatus structure is compact, reliable operation, and the diverging light of optical fiber output is converted into collimated light beam using fixed paraboloid focus lamp, by
The fiber optic collimator mirror of spherical surface or aspheric lens structures is not used in fiber-optic output, light beam focusing does not use lens mode yet,
Avoid aberration caused by lens.
Detailed description of the invention
Fig. 1 show the schematic device that the present invention is used for one-dimensional scanning；
Fig. 2 show the schematic device that the present invention is used for two-dimensional scanning；
Fig. 3 a show first controllable current source output electric current of the invention and schematic diagram of the second controllable current source output when being zero；
Fig. 3 b show second controllable current source output electric current of the invention and schematic diagram of the first controllable current source output when being zero；
Fig. 3 c show the first controllable current source of fixing of the invention and exports electric current, passes through and changes the big of the second controllable current source
Schematic diagram small, that driving vibrating shaft rotates clockwise；
Fig. 4 is existing scanning means structural schematic diagram；
In attached drawing: 1. fibre-optical splices, 2. fixed paraboloid focus lamps, 3. installation shells, the 4. Y-direction paraboloids of revolution focus
Mirror, 5. Y-direction vibrating shafts, 6. Y-direction magnetic control coils, 7. scanned objects, 8. X-direction plane mirrors, 9. X-directions
Vibrating shaft, 10. X-direction magnetic control coils；21. magnetic core, 22. first magnetic control coils, 23. second magnetic control coils, 24. first are controllably
Current source, 25. second controllable current sources.
Specific embodiment
Below in conjunction with specific embodiment, invention is further described in detail.It should be appreciated that described herein specific
Embodiment is only used to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of optical tomography scanning means, for solving the problems, such as existing scanning means, such as Fig. 4
The shown prior art realizes the scanning of both direction using mutually orthogonal rotating electric machine 11 and rotating electric machine 12, then passes through focusing
Lens 13 focus light beam, realize the scanning to scanned object 14.For the broadband light in optical coherent chromatographic imaging field
Source, the aberration effects of condenser lens systemic resolution.
As shown in Figure 1-3, optical tomography scanning means of the invention, including installation shell 3, it is installed on the installation
Fibre-optical splice 1, fixed paraboloid focus lamp 2, Y-direction paraboloid of revolution focus lamp 4, Y-direction vibrating shaft 5 and the side Y on shell 3
To magnetic control coil；The diverging light that the fibre-optical splice 1 exports is converged to collimated light beam by the fixed paraboloid focus lamp 2,
The optical axis of the fixed paraboloid focus lamp 2 and the Y-direction paraboloid of revolution focus lamp 4 is kept on the same line；The Y
Direction magnetic control coil 6 drives Y-direction vibrating shaft 5, and then by driving Y-direction paraboloid of revolution focus lamp 4 in scanned object 7
On be focused into hot spot, realize the one-dimensional shuttle-scanning in a direction, the present apparatus is mounted in single installation shell 3, makes
Apparatus structure is compact, reliable operation, and the diverging light of optical fiber output is converted into collimated light beam using fixed paraboloid focus lamp 2,
Since fiber-optic output does not use the fiber optic collimator mirror of spherical surface or aspheric lens structures, picture caused by fiber optic collimator mirror is avoided
Difference is focused collimated light beam using Y-direction whirling vibration paraboloid focus lamp 4, does not use lens focus, lens is overcome to draw
The aberration risen.
Optical tomography scanning means further includes the X-direction plane mirror 8 being mounted on installation shell 3, X-direction vibration
Moving axis 9 and X-direction magnetic control coil 10；The Y-direction paraboloid of revolution focus lamp 4 is converged to collimated light beam using the side X
To plane mirror 8, the X-direction magnetic control coil 10 drives X-direction vibrating shaft 9 to drive the X-direction plane mirror 8 in quilt
It scans on object 7, realizes that another direction is scanned.X, Y-direction vibrating shaft high speed reciprocating rotary in low-angle when device works,
And then focal beam spot is made to carry out two-dimensional scanning on scanned object surface, turn the convergence of the formation of paraboloid focus lamp 4 through revolving Y-direction
Light beam realizes the scanning around X-direction using X-direction plane mirror 8, and two scanning directions are mutually orthogonal, realize two sides
Two-dimensional scanning to scanned object 7, if only needing to carry out the scanning in a direction, X-direction plane mirror and X-direction
Vibrating shaft 9 and X-direction magnetic control coil can omit；Simultaneously because all optical elements that light beam is passed through from after optical fiber output are
Reflecting surface, can be to avoid lens aberration.
The Y-direction vibrating shaft 5 is set to the balance middle position of the Y-direction magnetic control coil 6；The X-direction
Vibrating shaft 9 is set to the middle position of the balance of the X-direction magnetic control coil 10.
The Y-direction vibrating shaft 5 is with the Y-direction magnetic control coil 6 of stating equipped with gap；The X-direction vibrating shaft 9 with it is described
X-direction magnetic control coil 10 is equipped with gap and Y-direction vibrating shaft 5 and the X-direction vibrating shaft 9 do not install magnetic control coil, to subtract
Its small rotary inertia.
The Y-direction vibrating shaft 5 and X-direction vibrating shaft 9 are orthogonal；The X-direction vibrating shaft and the Y-direction vibrating shaft
Shaft section be it is asymmetric, since the section of axis is asymmetric, when external magnetic circuit changes, axis can generate certain driving torque, axis
When low-angle is of reciprocating vibration near equilbrium position, guarantee that deflection angle and operating current keep approximate linear relationship.
The magnetic control coil includes magnetic core 21, magnetic control coil and controllable current source；Four magnetic poles of the magnetic core 21 around
Two magnetic control coils, controllable current source described in the external connection of the magnetic control coil；The magnetic control coil includes two group of first magnetic
Control coil 22 and the second magnetic control coil 23；The controllable current source includes the first controllable electric for driving the first magnetic control coil 22
Stream source 24 and the second controllable current source 25 for driving the second magnetic control coil 23.When in use, the first magnetic control coil 22 is driven
The first controllable current source 24 export constant electric current, by change the second controllable current source 25 output size of current and direction
Y-direction vibrating shaft 5 and the vibration at high speed in small angle range of X-direction vibrating shaft 9 are driven, according to load rotating inertia
Size reasonable selects the size of current source output electric current, since every group of coil is by independent first controllable current source 24, second
The driving of controllable current source 25 can meet vibration frequency requirement, also can control the calorific value of magnetic control coil.
Referring to Fig. 3 a, 3b, 3c when the first controllable current source 24 output the directional current as shown in Fig. 3 a arrow and second controllably
When the output of current source 25 is zero, the magnetic line of force direction that four magnetic poles, that is, A, B, C and D of magnetic core 21 is generated is as shown in Figure 3a, magnetic force
Line is coupled by axis, and Y-direction vibrating shaft 5 or X-direction vibrating shaft 9 are in the middle position of balance.When the second controllable current
Source 25 exports directional current as shown in Figure 3b and the first controllable current source 24 output when being zero, four magnetic pole, that is, A, B of magnetic core 21,
The magnetic line of force direction that C and D is generated is as shown in Figure 3b, and the magnetic line of force is coupled by axis, at Y-direction vibrating shaft 5 or X-direction vibrating shaft 9
In the middle position of balance.Wherein A, D magnetic pole magnetic line of force direction are identical in Fig. 3 a, 3b, B, C magnetic pole magnetic line of force direction phase
Instead.If the size and Orientation for keeping the first controllable current source 24 output electric current is steady state value shown in Fig. 3 a, while second can
The electric current that current source 25 exports direction shown in Fig. 3 b is controlled, then A, D magnetic pole magnetic induction intensity are reinforced and B, C magnetic pole magnetic induction intensity subtract
Weak, certain angle is to new equilbrium position rotationally clockwise for Y-direction vibrating shaft 5 and X-direction vibrating shaft 9, such as Fig. 3 c institute
Show.By calculating it is found that when deflection angle is smaller, angle holding linear relationship approximate with coil current；Change second in Fig. 3 c
The current direction of controllable current source 25, Y-direction vibrating shaft 5 and X-direction vibrating shaft 9 can rotate in an anti-clockwise direction.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of optical tomography scanning means, it is characterised in that: including installing shell (3), be installed on the installation shell
(3) fibre-optical splice (1), fixed paraboloid focus lamp (2), Y-direction paraboloid of revolution focus lamp (4), Y-direction vibrating shaft on
(5) and Y-direction magnetic control coil (6)；The diverging light of fibre-optical splice (1) output passes through the fixed paraboloid focus lamp (2)
It is converged to collimated light beam, the optical axis guarantor of the fixed paraboloid focus lamp (2) and the Y-direction paraboloid of revolution focus lamp (4)
It holds on the same line；The Y-direction magnetic control coil (6) drives Y-direction vibrating shaft (5), and then by driving Y-direction rotation to throw
Object plane focus lamp (4) is focused into hot spot on scanned object (7), and realizes a direction scanning.
2. optical tomography scanning means according to claim 1, it is characterised in that: optical tomography scanning means
It further include X-direction plane mirror (8), X-direction vibrating shaft (9) and the X-direction magnetic control coil being mounted in installation shell (3)
(10)；The convergent beam that the Y-direction paraboloid of revolution focus lamp (4) focuses using the X-direction plane mirror (8),
X-direction magnetic control coil (10) driving X-direction vibrating shaft (9) drives the X-direction plane mirror (8) in scanned object
(7) another direction is scanned on.
3. optical tomography scanning means according to claim 2, it is characterised in that: the Y-direction vibrating shaft (5) with
The Y-direction magnetic control coil (6) of stating is equipped with gap；The X-direction vibrating shaft (9) is equipped with the X-direction magnetic control coil (10)
Gap.
4. optical tomography scanning means according to claim 3, it is characterised in that: the Y-direction vibrating shaft (5) sets
It is placed in the balance middle position of the Y-direction magnetic control coil (6)；The X-direction vibrating shaft (9) is set to the X-direction
The middle position of the balance of magnetic control coil (10).
5. optical tomography scanning means according to claim 4, it is characterised in that: the Y-direction vibrating shaft (5) and
X-direction vibrating shaft (9) is orthogonal.
6. optical tomography scanning means according to claim 5, it is characterised in that: the X-direction vibrating shaft (9) and
The shaft section of the Y-direction vibrating shaft (5) is asymmetric.
7. optical tomography scanning means according to any one of claims 1-4, it is characterised in that: the magnetic control line
Circle includes magnetic core (21), magnetic control coil and controllable current source；Four magnetic poles of the magnetic core (21) are around two magnetic control coils, institute
It states magnetic control coil and is divided into two groups and driven by respective controllable current source.
8. optical tomography scanning means according to claim 7, it is characterised in that: the magnetic control coil includes two groups
First magnetic control coil (22) and the second magnetic control coil (23)；The controllable current source includes driving the first magnetic control coil (22)
The first controllable current source (24) and driving the second magnetic control coil (23) the second controllable current source (25).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910162544 | 2019-03-05 | ||
| CN2019101625440 | 2019-03-05 |
Publications (1)
| Publication Number | Publication Date |
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| CN110095863A true CN110095863A (en) | 2019-08-06 |
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| CN201910479347.1A Pending CN110095863A (en) | 2019-03-05 | 2019-06-04 | A kind of optical tomography scanning means |
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2019
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