CN105388640A - Inclined transducer device used for acousto-optic tunable filter - Google Patents
Inclined transducer device used for acousto-optic tunable filter Download PDFInfo
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- CN105388640A CN105388640A CN201511006446.6A CN201511006446A CN105388640A CN 105388640 A CN105388640 A CN 105388640A CN 201511006446 A CN201511006446 A CN 201511006446A CN 105388640 A CN105388640 A CN 105388640A
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- transducer
- thickness
- acousto
- frequency
- transducer device
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/11—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses an inclined transducer device used for an acousto-optic tunable filter. The thickness of the transducer is gradually increased from one end to the other end in the length direction and includes corresponding thicknesses of all frequency points from a low-frequency end to a high-frequency end within the working bandwidth of a component. Sound field intensity generated within the whole working bandwidth is more uniform, diffraction efficiency is more uniform, and a larger working bandwidth of the component is easier to achieve.
Description
Technical field
The present invention relates to the transducer apparatus for acousto-optical device, especially a kind of rhombic transducer device for acousto-optic turnable filter.
Background technology
Acousto-optic turnable filter is a kind of optoelectronic device utilizing acoustooptic effect to realize spectrum function, be made up of acoustic optic interaction medium, transducer apparatus, match circuit and package casing, wherein transducer apparatus is the driving source of acousto-optic turnable filter sound field, it is arranged on the logical sound face of acoustic optic interaction medium, and its effect is ultrasound wave external radio frequency electric signal being converted to same frequency.The operational frequency bandwidth of acousto-optic turnable filter depends on the operational frequency bandwidth of transducer apparatus, and the mode of operation due to transducer apparatus is thickness drive pattern, and its frequency of operation depends on the thickness of transducer apparatus.
Current acousto-optic turnable filter transducer apparatus mainly adopts uniform thickness design, and the integral thickness of transducer 2 is designed to the half-wavelength thickness of centre frequency in devices function bandwidth, as Fig. 1.Adopt this design transducer apparatus can produce stronger sound field at centre frequency place, the sound field that frequency of operation point at bandwidth of operation two ends produces is more weak, this diffraction efficiency causing device to obtain at centre frequency place is higher, the diffraction efficiency that bandwidth two ends obtain is lower, and overall diffraction efficiency is skewness in bandwidth of operation.Simultaneously narrower based on the obtainable bandwidth of operation of device of this transducer designs.
Summary of the invention
For prior art above shortcomings, the object of the present invention is to provide a kind of rhombic transducer device for acousto-optic turnable filter, obtain to make device evenly diffraction efficiency distribution and easily realize larger bandwidth of operation.
To achieve these goals, the technical solution used in the present invention is as follows:
For the rhombic transducer device of acousto-optic turnable filter, it is characterized in that: transducer thickness from one end to the other side progressive additive along its length, the thickness of transducer to include in devices function bandwidth low frequency to the corresponding thickness of all Frequency points in high frequency two ends.
Described transducer thickness linearly changes.
Transducer one end thickness is corresponding with the thickness that low frequency in devices function bandwidth needs, and transducer other end thickness is corresponding with the thickness that high frequency points in devices function bandwidth needs.
Principle of work of the present invention is: the thickness due to transducer to include in devices function bandwidth low frequency to the corresponding thickness of all Frequency points in high frequency two ends, the sound field intensity produced in whole bandwidth of operation evenly.
Compared with prior art, the present invention has following beneficial effect:
1. the present invention realize device in working band diffraction efficiency evenly.
2. the present invention by changing the thickness difference at transducer two ends, can more easily realize larger devices function bandwidth.
Accompanying drawing explanation
Fig. 1-existing acousto-optic turnable filter transducer apparatus structural representation.
A kind of example structure schematic diagram of Fig. 2-acousto-optic turnable filter transducer apparatus of the present invention.
The another kind of example structure schematic diagram of Fig. 3-acousto-optic turnable filter transducer apparatus of the present invention.
Wherein, 1-acoustic optic interaction medium; 2-transducer.
Embodiment
Describe the present invention below in conjunction with the drawings and specific embodiments.
See Fig. 2 and Fig. 3, upper as can be seen from figure, the present invention is used for the rhombic transducer device of acousto-optic turnable filter, transducer thickness is no longer uniformly distributed, but be inclined-plane distribution along transducer length, i.e. transducer thickness from one end to the other side progressive additive along its length, and the thickness of transducer to include in devices function bandwidth low frequency to the corresponding thickness of all Frequency points in high frequency two ends.
Particularly, described transducer thickness linearly changes.Wherein transducer one end thickness is corresponding with the thickness that low frequency in devices function bandwidth needs, and transducer other end thickness is corresponding with the thickness that high frequency points in devices function bandwidth needs.
Transducer gauge of the present invention shows as on transducer length direction that one end is low, one end is high, and transducer thickness, from low side to high-end continuous increase, makes transducer upper surface and lower surface be Qi Xing branch.
Fig. 2 is a kind of embodiment of the present invention, and transducer 2 is bonded in acoustic optic interaction medium 1 by metallic film and leads to sound face, and utilize thinning mode that transducer 2 upper surface is processed as dip plane, inclined-plane ascent direction is consistent with transducer 2 length direction.
Fig. 3 is the another kind of embodiment of the present invention, is that transducer inclined-plane ascent direction is contrary with the difference of Fig. 2.
Compared with the uniform acousto-optic turnable filter transducer architecture of thickness shown in Fig. 1, although this structure in the diffraction efficiency of center frequency points not as good as prior art, this structure is more balanced in the diffraction efficiency of each frequency of operation point, and this especially user be concerned about.
The above embodiment of the present invention is only for example of the present invention is described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, other multi-form change and variations can also be made on the basis of the above description.Here cannot give exhaustive to all embodiments.Every belong to technical scheme of the present invention the apparent change of amplifying out or variation be still in the row of protection scope of the present invention.
Claims (3)
1. for the rhombic transducer device of acousto-optic turnable filter, it is characterized in that: transducer thickness from one end to the other side progressive additive along its length, the thickness of transducer to include in devices function bandwidth low frequency to the corresponding thickness of all Frequency points in high frequency two ends.
2. the rhombic transducer device for acousto-optic turnable filter according to claim 1, is characterized in that: described transducer thickness linearly changes.
3. the rhombic transducer device for acousto-optic turnable filter according to claim 1 and 2, it is characterized in that: transducer one end thickness is corresponding with the thickness of frequency needs low in devices function bandwidth, and transducer other end thickness is corresponding with the thickness that high frequency points in devices function bandwidth needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006446.6A CN105388640B (en) | 2015-12-29 | 2015-12-29 | Rhombic transducer device for acousto-optic turnable filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006446.6A CN105388640B (en) | 2015-12-29 | 2015-12-29 | Rhombic transducer device for acousto-optic turnable filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105388640A true CN105388640A (en) | 2016-03-09 |
| CN105388640B CN105388640B (en) | 2019-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511006446.6A Active CN105388640B (en) | 2015-12-29 | 2015-12-29 | Rhombic transducer device for acousto-optic turnable filter |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1813215A (en) * | 2003-07-07 | 2006-08-02 | 株式会社村田制作所 | Acoustooptic filter |
| CN102213845A (en) * | 2011-06-14 | 2011-10-12 | 中国电子科技集团公司第二十六研究所 | Acousto-optic adjustable light filter with broadband |
| WO2015099836A1 (en) * | 2013-12-27 | 2015-07-02 | General Electric Company | Ultrasound transducer and ultrasound imaging system with a variable thickness dematching layer |
| WO2015148261A1 (en) * | 2014-03-26 | 2015-10-01 | Baker Hughes Incorporated | Variable thickness acoustic transducers |
| CN105047811A (en) * | 2015-05-29 | 2015-11-11 | 北京信息科技大学 | Stack piezoelectric transducer based on piezoelectric material layers with different thicknesses |
| CN205229601U (en) * | 2015-12-29 | 2016-05-11 | 中国电子科技集团公司第二十六研究所 | A tilting transducer device for adjustable filter of reputation |
-
2015
- 2015-12-29 CN CN201511006446.6A patent/CN105388640B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1813215A (en) * | 2003-07-07 | 2006-08-02 | 株式会社村田制作所 | Acoustooptic filter |
| CN102213845A (en) * | 2011-06-14 | 2011-10-12 | 中国电子科技集团公司第二十六研究所 | Acousto-optic adjustable light filter with broadband |
| WO2015099836A1 (en) * | 2013-12-27 | 2015-07-02 | General Electric Company | Ultrasound transducer and ultrasound imaging system with a variable thickness dematching layer |
| WO2015148261A1 (en) * | 2014-03-26 | 2015-10-01 | Baker Hughes Incorporated | Variable thickness acoustic transducers |
| CN105047811A (en) * | 2015-05-29 | 2015-11-11 | 北京信息科技大学 | Stack piezoelectric transducer based on piezoelectric material layers with different thicknesses |
| CN205229601U (en) * | 2015-12-29 | 2016-05-11 | 中国电子科技集团公司第二十六研究所 | A tilting transducer device for adjustable filter of reputation |
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| Publication number | Publication date |
|---|---|
| CN105388640B (en) | 2019-08-02 |
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