CN208351165U - High-diffraction efficiency energy converter for focus on light beam acoustooptic diffraction - Google Patents
High-diffraction efficiency energy converter for focus on light beam acoustooptic diffraction Download PDFInfo
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- CN208351165U CN208351165U CN201820249605.8U CN201820249605U CN208351165U CN 208351165 U CN208351165 U CN 208351165U CN 201820249605 U CN201820249605 U CN 201820249605U CN 208351165 U CN208351165 U CN 208351165U
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- energy converter
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- curved surface
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- optic medium
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Abstract
The utility model provides a kind of high-diffraction efficiency energy converter for focus on light beam acoustooptic diffraction, and one side of the energy converter Matching installation on acousto-optic medium is curved surface, the thickness of curved surface homogeneous phase etc. on the surface normal direction.The utility model is designed as curved surface by the way that energy converter to be mounted on acousto-optic medium on one side, the curvature of the curved surface is designed, more acoustic wave energies can be focused to project in the light field region formed in acousto-optic medium and acoustooptic diffraction occurs, so as to improve diffraction efficiency.
Description
Technical field
The utility model belongs to bulk wave a-o devices field, and in particular to a kind of Gao Yan for focus on light beam acoustooptic diffraction
Penetrate efficiency energy converter.
Background technique
Bulk wave a-o devices are the photoelectricity using acoustic optic interaction principle control luminous intensity, frequency, wavelength, spatial position etc.
Sub- device is mainly made of acousto-optic medium, energy converter, match circuit and package casing, and wherein energy converter is bulk wave a-o devices
Sound field driving source, be mounted on acousto-optic medium, effect be the ultrasonic wave that external radio frequency electric signal is converted to identical frequency.
Bulk wave a-o devices need in certain specific applications (such as carrying out High Speed Modulation, big bandwidth shift frequency to light amplitude)
Beam waist very little, the very big optical field distribution of the light angle of divergence are formed in acousto-optic medium, as shown in Figure 1, wherein α indicates light hair
Dissipate angle.In order to obtain ideal modulation amplitude, frequency bandwidth response, the sound field to match using the angle of divergence and the light angle of divergence is needed
Acoustooptic diffraction is participated in, i.e. light angle of divergence alpha matches with sound divergence angle beta in Fig. 1.It is put down currently, generalling use Fig. 1 to shown in Fig. 2
Face transducer architecture guarantees that light angle of divergence alpha matches with sound divergence angle beta, but in this configuration, and energy converter 2 is by sound wave
After being transmitted to acousto-optic medium 1, horn-like sound field region is formed in acousto-optic medium, only a small amount of sound wave enters acousto-optic at this time
Diffraction occurs in the light field region 11 of medium 1.Although energy converter in the prior art can guarantee light angle of divergence alpha and sound as a result,
Divergence angle beta matches, but the sound wave entered in light field region is less, and diffraction efficiency is lower.
Utility model content
The utility model provides a kind of high-diffraction efficiency energy converter for focus on light beam acoustooptic diffraction, to solve to change at present
Although energy device can guarantee that the light angle of divergence matches with the sound angle of divergence, the lower problem of diffraction efficiency.
According to the utility model embodiment in a first aspect, providing a kind of high diffraction effect for focus on light beam acoustooptic diffraction
Rate energy converter, one side of the energy converter Matching installation on acousto-optic medium are curved surface, and the thickness of the curved surface is in the surface normal
Homogeneous phase etc. on direction.
In an optional implementation manner, the curved surface is along the light wave transmissions direction and/or along perpendicular to institute
State the direction bending of light wave transmissions.
In another optional implementation, the acousto-optic medium is used to install the mounting surface of the curved surface as with institute
State the curved surface of curved surface same curvature.
In another optional implementation, the energy converter is fitted closely with the acousto-optic medium mounting surface.
In another optional implementation, the curved surface surface intersection structure same or different by multiple curvature
At.
The beneficial effects of the utility model are:
1, the utility model is designed as curved surface by the way that energy converter to be mounted on acousto-optic medium on one side, can will be more
Acoustic wave energy, which focuses, occurs acoustooptic diffraction in the light field region for projecting and being formed in acousto-optic medium, so as to improve diffraction effect
Rate；
2, the utility model is by making the thickness of curved surface homogeneous phase etc. on surface normal direction, and is the center of sound wave frequency
Rate point excites corresponding thickness by peak efficiency, and the launching efficiency of sound wave can be improved, and guarantee has more acoustic wave energies to focus
It projects in the light field region of acousto-optic medium, so as to further increase diffraction efficiency；
3, the utility model is by making curved surface along the light wave transmissions direction and along perpendicular to the light wave transmissions
Direction bending, the curved surface that curved form can be made to constitute at two surface intersections, so as to further by more acoustic wave energies
Focusing projects in light field region, so as to further increase diffraction efficiency.
Detailed description of the invention
Fig. 1 is one embodiment main view of energy converter in the prior art；
Fig. 2 is one embodiment side view of energy converter in the prior art；
Fig. 3 is master of the utility model for the first embodiment of the high-diffraction efficiency energy converter of focus on light beam acoustooptic diffraction
View；
Fig. 4 is side of the utility model for the first embodiment of the high-diffraction efficiency energy converter of focus on light beam acoustooptic diffraction
View；
Fig. 5 is master of the utility model for the second embodiment of the high-diffraction efficiency energy converter of focus on light beam acoustooptic diffraction
View；
Fig. 6 is side of the utility model for the second embodiment of the high-diffraction efficiency energy converter of focus on light beam acoustooptic diffraction
View；
Fig. 7 is master of the utility model for the 3rd embodiment of the high-diffraction efficiency energy converter of focus on light beam acoustooptic diffraction
View；
Fig. 8 is side of the utility model for the 3rd embodiment of the high-diffraction efficiency energy converter of focus on light beam acoustooptic diffraction
View.
Specific embodiment
In order to make those skilled in the art more fully understand the technical scheme in the embodiment of the utility model, and make this reality
Can be more obvious and easy to understand with the above objects, features, and advantages of new embodiment, with reference to the accompanying drawing to the utility model reality
Technical solution in example is applied to be described in further detail.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " connection " should be done extensively
Reason and good sense solution, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can be directly connected,
It can also understand as the case may be indirectly connected through an intermediary, for the ordinary skill in the art
The concrete meaning of above-mentioned term.
The utility model embodiment provides a kind of high-diffraction efficiency energy converter for focus on light beam acoustooptic diffraction, matching
The one side being mounted on acousto-optic medium is curved surface, so that sound wave, after the curved surface is transmitted to acousto-optic medium, focusing projects sound
Acoustooptic diffraction occurs for the light field region formed in optical medium.Wherein, it is formed in acousto-optic medium after light wave transmissions to acousto-optic medium
Beam waist very little, the very big light field region of the light angle of divergence, sound wave by the curved surface energy converter excite, along with the light wave
The vertical direction of transmission direction is transmitted to the acousto-optic medium, and hourglass-shaped sound field region is formed in acousto-optic medium.Certainly, in order to
More acoustic wave energies can be made to be focused to project in light field region, many experiments can be carried out to the curvature of energy converter curved surface,
To improve diffraction efficiency.For example, when the relative positional relationship to the central connecting part in hourglass-shaped sound field region and light field region into
After row is adjusted, focuses the acoustic wave energy projected in light field region and be greater than horn-like sound field zone focusing projection shown in Fig. 1 and Fig. 2
When to acoustic wave energy in light field region, diffraction efficiency be will be enhanced.Foregoing description does not indicate song described in the utility model
The curvature in face is necessary for designated value, and refers to and can reach optimum efficiency when curvature is designated value.It only need to meet energy converter to be pacified
One side on the acousto-optic medium of dress is that curved surface is the higher function of diffraction efficiency of can reach relatively existing energy converter.
Loss when in order to reduce sound wave to the greatest extent by curved surface, the thickness of curved surface homogeneous phase etc. on surface normal direction,
And corresponding thickness is excited by peak efficiency for the center frequency points of sound wave.Due to sound wave excitation it is high-efficient, be transmitted to
The acoustic wave energy of acousto-optic medium is larger, and the acoustic wave energy that focusing projects light field region is also larger, it is possible thereby to further increase
Diffraction efficiency.In addition, through applicants have found that, curvature of curved surface design it is also closely related with the size of the sound wave angle of divergence.It needs
It is to be noted that the curved surface can be a fixed curved surface of curvature, it is also possible to by same or different multiple of curvature
Surface intersection is constituted, and when curved surface is made of multiple surface intersections, more acoustic wave energies can be focused and be projected light field area
In domain, so as to further increase diffraction efficiency.
Ginseng is seen figures 3 and 4, be followed successively by the utility model for focus on light beam acoustooptic diffraction high-diffraction efficiency energy converter the
The main view and side view of one embodiment.The one side of 2 Matching installation of energy converter on acousto-optic medium 1 is curved surface, the curved surface edge
Perpendicular to light wave transmissions (arrow direction in Fig. 4) direction be bent, the energy converter mounting surface of acousto-optic medium 1 be also configured as along
Perpendicular to the direction bending of optical transport, to install with 2 SURFACES MATCHING of energy converter, as can be seen from Figure 3 sound wave is passed by curved surface 2
After transporting to acousto-optic medium 1, hourglass-shaped sound field region B is formed, forms light field region A after light wave transmissions to acousto-optic medium 1, it is hourglass-shaped
Sound wave in the B of sound field region, which is focused, to be projected in the A of light field region.It, can in order to guarantee that energy converter is fitted closely with acousto-optic medium
To use metal or nonmetal film, energy converter and acousto-optic medium are fit together.
As seen from the above-described embodiment, the utility model is designed as song by the way that energy converter to be mounted on acousto-optic medium on one side
The focusing of more acoustic wave energies can be projected in the light field region formed in acousto-optic medium and acoustooptic diffraction occurs by face, thus
Diffraction efficiency can be improved.
Referring to Figures 5 and 6, be followed successively by the utility model for focus on light beam acoustooptic diffraction high-diffraction efficiency energy converter the
The main view and side view of two embodiments.The one side of 2 Matching installation of energy converter on acousto-optic medium 1 is curved surface, the curved surface edge
Light wave transmissions direction (arrow direction in Fig. 4) bending, the energy converter mounting surface of acousto-optic medium 1 is also configured as along optical transport side
To bending, to be installed with 2 SURFACES MATCHING of energy converter, as can be seen from Figure 5 sound wave after curved surface 2 is transmitted to acousto-optic medium 1,
Hourglass-shaped sound field region B is formed, forms light field region A, the sound in hourglass-shaped sound field region B after light wave transmissions to acousto-optic medium 1
Wave, which is focused, to be projected in the A of light field region.In order to guarantee that energy converter is fitted closely with acousto-optic medium, metal or non-gold can be used
Belong to film, energy converter and acousto-optic medium are fit together.
As seen from the above-described embodiment, the utility model is designed as song by the way that energy converter to be mounted on acousto-optic medium on one side
The focusing of more acoustic wave energies can be projected in the light field region formed in acousto-optic medium and acoustooptic diffraction occurs by face, thus
Diffraction efficiency can be improved.
Referring to Fig. 7 and 8, be followed successively by the utility model for focus on light beam acoustooptic diffraction high-diffraction efficiency energy converter the
The main view and side view of three embodiments.The one side of 2 Matching installation of energy converter on acousto-optic medium 1 is curved surface, the curved surface edge
Light wave transmissions direction (arrow direction in Fig. 4) bending and perpendicular to light wave transmissions direction be bent, the transducing of acousto-optic medium 1
Device mounting surface is also configured as being bent along optical transmission direction and be bent perpendicular to the direction of light wave transmissions, with bent with energy converter 2
Face Matching installation, from Fig. 7 and 8 it can be seen that sound wave after curved surface 2 is transmitted to acousto-optic medium 1, form hourglass-shaped sound field area
Domain B forms light field region A after light wave transmissions to acousto-optic medium 1, and the sound wave in hourglass-shaped sound field region B, which is focused, projects light
In field areas A.In order to guarantee that energy converter is fitted closely with acousto-optic medium, metal or nonmetal film can be used, by energy converter
It fits together with acousto-optic medium.
As seen from the above-described embodiment, the utility model is designed as song by the way that energy converter to be mounted on acousto-optic medium on one side
The focusing of more acoustic wave energies can be projected in the light field region formed in acousto-optic medium and acoustooptic diffraction occurs by face, thus
Diffraction efficiency can be improved.
Those skilled in the art are considering specification and after practicing utility model disclosed herein, will readily occur to practical
Novel other embodiments.This application is intended to cover any variations, uses, or adaptations of the utility model, these
Variations, uses, or adaptations follow the general principle of the utility model and including undocumented skills of the utility model
Common knowledge or conventional techniques in art field.The description and examples are only to be considered as illustrative, the utility model
True scope and spirit are indicated by the following claims.
It should be understood that the utility model is not limited to the accurate knot for being described above and being shown in the accompanying drawings
Structure, and various modifications and changes may be made without departing from the scope thereof.The scope of the utility model is only wanted by appended right
It asks to limit.
Claims (5)
1. a kind of high-diffraction efficiency energy converter for focus on light beam acoustooptic diffraction, which is characterized in that energy converter Matching installation exists
One side on acousto-optic medium is curved surface, the thickness of curved surface homogeneous phase etc. on the surface normal direction.
2. the high-diffraction efficiency energy converter according to claim 1 for focus on light beam acoustooptic diffraction, which is characterized in that institute
Curved surface is stated along light wave transmissions direction and/or along the direction bending perpendicular to the light wave transmissions.
3. the high-diffraction efficiency energy converter according to claim 1 for focus on light beam acoustooptic diffraction, which is characterized in that institute
Stating mounting surface of the acousto-optic medium for installing the curved surface is the curved surface with the curved surface same curvature.
4. the high-diffraction efficiency energy converter according to claim 1 for focus on light beam acoustooptic diffraction, which is characterized in that institute
Energy converter is stated to fit closely with the acousto-optic medium mounting surface.
5. the high-diffraction efficiency energy converter according to claim 1 for focus on light beam acoustooptic diffraction, which is characterized in that institute
Curved surface is stated to be made of the same or different surface intersection of multiple curvature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720510251 | 2017-05-10 | ||
| CN2017205102513 | 2017-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208351165U true CN208351165U (en) | 2019-01-08 |
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ID=64874045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820249605.8U Active CN208351165U (en) | 2017-05-10 | 2018-02-12 | High-diffraction efficiency energy converter for focus on light beam acoustooptic diffraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208351165U (en) |
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2018
- 2018-02-12 CN CN201820249605.8U patent/CN208351165U/en active Active
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