CN205581444U - It is thus clear that adjustable filter of medium wave reputation - Google Patents
It is thus clear that adjustable filter of medium wave reputation Download PDFInfo
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- CN205581444U CN205581444U CN201620423821.0U CN201620423821U CN205581444U CN 205581444 U CN205581444 U CN 205581444U CN 201620423821 U CN201620423821 U CN 201620423821U CN 205581444 U CN205581444 U CN 205581444U
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- copper foil
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Abstract
The utility model discloses an it is thus clear that adjustable filter of medium wave reputation, including acousto -optic medium, transducer, table electrode and matching network, the transducer is three, installs respectively on acousto -optic medium two relative logical sound faces, one of them installs two transducers on leading to the sound face, and the thickness of these two transducers makes filter operating wavelength cover whole visible light wave band, another installs a transducer on leading to the sound face, and this transducer thickness makes filter work at the MF band, every transducer is corresponding one set of table electrode, welding lead and matching network. The utility model discloses two wave bands of visible light (400nm to 1000nm) and medium wave (3000nm to 4500nm) have been compromise simultaneously to the operating wavelength scope to make full use of reputation dielectric material. Welded copper foil transmission radiofrequency signal is adopted, the efficiency of radiofrequency signal transmission can be improved by a wide margin.
Description
Technical field
This utility model relates to the acousto-optical device of laser system, is especially suitable for the acousto-optic turnable filter of light spectrum image-forming or spectrum analysis, belongs to acoustic optical devices technical field.
Background technology
Light spectrum image-forming or the acousto-optic turnable filter of spectrum analysis, be mainly made up of acousto-optic medium, transducer, table electrode and matching network etc..The matched network of radiofrequency signal, filamentary silver are transferred on table electrode, and transducer is converted into ultrasonic transmission in acoustic optic interaction medium radiofrequency signal, forms refractive-index grating, incident illumination and refractive-index grating generation acoustic optic interaction, produce diffraction light in medium.The optical wavelength of diffraction light becomes one-to-one relationship with the frequency of radiofrequency signal.The radiofrequency signal of input different frequency, transducer just produces the ultrasound wave of corresponding frequencies, and then leaches the diffraction light of respective wavelength.
Along with the development of modern technologies, simulation and stealthy technology has been widely used in the weaponrys such as individual soldier, vehicle, tank, aircraft, naval vessel so that conventional technique means are increasingly difficult to scout identification.Hyper spectral Imaging technology based on acousto-optic turnable filter is the military surveillance technology the most just grown up, it has fast response time, good environmental adaptability, has the advantage such as imaging and spectrographic detection concurrently, the complex spectrum pattern that multi-wavelength works simultaneously can also be realized by programming, reach to detect rapidly single wave band and be difficult to the purpose of complex target, the degree grasped it and use directly determines battle field information initiative, has very important military significance.
But the spectral region of acousto-optic turnable filter work at present is all single wave band: ultraviolet, visible ray, near-infrared or medium wave band, takes into account the acousto-optic turnable filter of visible ray and medium wave band the most simultaneously.Can effectively overcome dummy load on weaponry, the light-intensity difference of day and night, the interference etc. of smog sleet based on taking into account the visible ray ultra-optical spectrum imaging system with medium wave band, identify rapidly the simulation and stealthy target of single band system None-identified.
Dividing from acousto-optic turnable filter transducer architecture, present acousto-optic turnable filter mainly has three major types: the first is monolithic transducer architecture, makes a transducer on a logical sound face of acousto-optic turnable filter acousto-optic medium；The second is double-sheet arrangement, makes the transducer that two thickness is different on the same logical sound face of acousto-optic turnable filter acousto-optic medium；The third is also double-sheet arrangement, the transducer that one thickness of each making is different on two logical sound faces that acousto-optic medium is relative.These three acousto-optic turnable filter is respectively arranged with some shortcomings: the first is limited by transducer bandwidth of operation due to the most a piece of transducer, light filter, and the spectral region of its work is very limited, even can not cover whole visible-ranges；The second is owing to being limited by process conditions, it is difficult to make the two panels transducer (difference in thickness is generally less than 50%) that difference in thickness is bigger, simultaneously because also limited by sonic transmissions direction, it is impossible to make full use of the interaction region of acousto-optic medium, waste the acousto-optic medium material of preciousness, see Fig. 3；Although the third can make full use of acousto-optic medium material, but can only make two different transducers of thickness, also limit the spectral region of acousto-optic turnable filter.
In order in radio signal transmission to table electrode, acousto-optic turnable filter generally will between table electrode and match circuit plate welding lead (general diameter is the filamentary silver of 0.13mm), this mode is relatively big to the attenuation ratio of radiofrequency signal, wastes the radiofrequency signal of preciousness.Its reason is: the diameter of lead-in wire is smaller, and the surface area of transmitting radio frequency signal is smaller, and radio frequency signal frequency is higher, belonging to high-frequency signal, it trends towards the surface delivery of transmission line, and its loss is inversely proportional to the surface area of transmission line, surface area is the least, and loss is the biggest.
Welding lead can not be by the reason of the bigger filamentary silver of diameter: if with the bigger filamentary silver of diameter, filamentary silver is using or can produce in transportation bigger stress damage transducer, table electrode or the solder joint of welding filamentary silver, causing product failure, therefore acousto-optic turnable filter generally uses the smaller filamentary silver connection table electrode of diameter and matching network.
Utility model content
It is all single wave band and the big deficiency of loss for existing acousto-optic turnable filter operating spectral range, the purpose of this utility model is to provide a kind of visible medium wave acousto-optic turnable filter, and this light filter can be taken into account visible ray and medium wave band simultaneously and can improve radio signal transmission efficiency.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of visible medium wave acousto-optic turnable filter, including acousto-optic medium, transducer, table electrode and matching network, transducer is installed on the logical sound face of acousto-optic medium by weld layer, and table electrode is located at transducer face, and matching network is connected by welding lead and table electrode；Described transducer is three, is separately mounted on two logical sound faces that acousto-optic medium is relative；Being provided with two transducers on one of them logical sound face, the thickness of the two transducer is respectively 24 μm-26 μm and 13.5 μm-14.5 μm, and the transducer of these two thickness makes light filter operation wavelength cover whole visible light wave range；Being provided with a transducer on another logical sound face, this transducer thickness is that 118 μm-122 μm are so that light filter is operated in medium wave band；Each transducer correspond to a set of table electrode, welding lead and matching network.
The welding lead connecting all matching networks and table electrode is Copper Foil, and Copper Foil one end is by eutectic welding tin welding on table electrode, and the matching network that the other end is corresponding with this table electrode links together.
Being connected to Copper Foil by eutectic welding soldering on the weld layer that each transducer is corresponding, the ground of the matching network that the Copper Foil other end is corresponding with this transducer links together.
Described Copper Foil is calendering copper, and its thickness is 5 μm-15 μm, and width is not less than 2mm.
The angle theta of acousto-optic medium optical axis direction C and the direction K in logical sound face is in the range of 100.5 °-101.5 °.
Leading at acousto-optic medium and be coated with antireflective film on bright finish, this antireflective film is respectively less than 8% at the reflectance of visible ray (400nm to 1000nm) and two wave bands of medium wave (3000nm to 4500nm).
Compared to existing technology, this utility model has the advantages that
1, this utility model has all made transducer on two logical sound faces that acousto-optic medium is relative, two transducers have been made on one of them logical sound face, the two transducer band of operation is 220MHz to 68MHz, and at this moment the operating wavelength range of light filter is 400nm to 1000nm；Another one is led to and has been made a transducer on sound face, and the bandwidth range of its work is 22MHz to 14MHz, and at this moment the operating wavelength range of light filter is 3000nm to 4500nm.Therefore, acousto-optic turnable filter operating wavelength range of the present utility model has taken into account visible ray (400nm to 1000nm) and two wave bands of medium wave (3000nm to 4500nm) simultaneously, and takes full advantage of acousto-optic medium material.
It is to be noted, owing to the wave-length coverage of explorer response is typically covered with 400nm to 1000nm, therefore complete machine is intended to light filter visible light wave range and can match with the wave-length coverage of explorer response, to obtain more spectral information, and then improves the practicality of imaging reconnaissance system.
2, this utility model uses the Copper Foil transmitting radio frequency signal of welding, Copper Foil width is not less than 2mm, the width of tow sides transmitting radio frequency signal is just not less than 4mm, this is 10 times of conventional filamentary silver (diameter 0.13mm) girth, according to the Kelvin effect of high-frequency signal, the efficiency of radio signal transmission thus can be greatly improved.Simultaneously as Copper Foil is the thinnest, and being calendering copper, its ductility and toughness are the best, therefore with low temperature scolding tin, it is welded on table electrode, light filter can be made to have extraordinary environmental suitability.
Accompanying drawing explanation
Fig. 1-this utility model device architecture schematic diagram.
Fig. 2-this utility model overall structure schematic diagram.
Biplate transducer architecture waste acousto-optic medium material schematic diagram on the same logical sound face of Fig. 3-prior art.
nullIn figure，1-acousto-optic medium，2-the first weld layer，3-the first transducer，4-the first table electrode，5-the first low temperature scolding tin，6-the first Copper Foil，7-the first matching network，8-the second low temperature scolding tin，9-the second Copper Foil 2，10-the second transducer，11-the second table electrode，12-the 3rd low temperature scolding tin，13-the 3rd Copper Foil，14-the second matching network，15-the 4th Copper Foil，16-the 4th low temperature scolding tin，17-the second weld layer，18-first leads to sound face，19-the 3rd weld layer，20-the 5th low temperature scolding tin，21-the 5th Copper Foil，22-the 3rd transducer，23-the 3rd table electrode，24-the 6th low temperature scolding tin，25-the 6th Copper Foil，26-the 3rd matching network，27-second leads to sound face，28-ultrasound wave，29-visible-light detector，30-image processing system，31-medium wave detector，32-leads to bright finish，33-antireflective film，C-acousto-optic medium optical axis direction，K-leads to the direction in sound face，The angle of θ-acousto-optic medium optical axis direction C and the direction K in logical sound face.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.
In order to take into account visible ray and medium wave band, this utility model light filter has made three different transducers of thickness on the logical sound face of acousto-optic medium two, and transducer material is the lithium columbate crystal of X cut type, and its operating frequency is relevant with its thickness.Two transducers have been made on one of them logical sound face, the two transducer makes light filter operation wavelength cover whole visible light wave range, another one is led to and has been made a transducer on sound face, this transducer makes light filter be operated in medium wave band, therefore, this acousto-optic turnable filter operating wavelength range has taken into account visible ray (400nm to 1000nm) and two wave bands of medium wave (3000nm to 4500nm) simultaneously.Concrete structure is described below:
See Fig. 1 and Fig. 2, can be seen that from figure, medium wave acousto-optic turnable filter seen from this utility model, mainly by acousto-optic medium the 1, first weld layer the 2, first transducer the 3, first table electrode the 4, first low temperature scolding tin the 5, first Copper Foil the 6, first matching network the 7, second low temperature scolding tin the 8, second Copper Foil the 9, second transducer the 10, second table electrode the 11, the 3rd low temperature scolding tin 12,
3rd Copper Foil the 13, second matching network 14, the 4th Copper Foil 15, the 4th low temperature scolding tin the 16, second weld layer 17, first lead to sound face 18, the 3rd weld layer 19, the 5th low temperature scolding tin 20, the 5th Copper Foil 21, the 3rd transducer 22, the 3rd table electrode 23, the 6th low temperature scolding tin 24, the 6th Copper Foil 25, the 3rd matching network 26, second lead to sound face 27, composition such as logical bright finish 32 and antireflective film 33 etc..
Acousto-optic medium 1 is tellurium oxide crystal, and the first transducer 3 is installed on the first of acousto-optic medium and leads on sound face 18, and the first weld layer 2 acousto-optic medium 1 welds together with the first transducer 3.First table electrode 4 is positioned on the first transducer 3, and second 8, low temperature scolding tin the second Copper Foil 9 is welded on the first table electrode 4, and the other end of the second Copper Foil 9 links together with the first matching network 7.First 5, low temperature scolding tin the first Copper Foil 6 is welded on the first weld layer 2, and the ground of first Copper Foil 6 other end and the first matching network 7 links together.Radiofrequency signal RF1 is transferred on the first table electrode 4 by first matching network the 7, second Copper Foil 9 and the second low temperature scolding tin 8, first transducer 3 absorbs radiofrequency signal, and radiofrequency signal is converted to ultrasound wave 28 is transferred in acousto-optic medium 1, incident illumination and ultrasound wave occur acoustic optic interaction to produce the first diffraction light in acousto-optic medium 1, and the first diffraction light is o light.
In like manner, the second transducer 10 is installed on the first of acousto-optic medium and leads on sound face 18, and the second weld layer 17 acousto-optic medium 1 welds together with the second transducer 10.Second table electrode 11 is positioned on the second transducer 10, and the 3rd 12, low temperature scolding tin the 3rd Copper Foil 13 is welded on the second table electrode 11, and the other end of the 3rd Copper Foil 13 links together with the second matching network 14.4th 16, low temperature scolding tin the 4th Copper Foil 15 is welded on the second weld layer 17, and the 4th Copper Foil 15 links together with the ground of the second matching network 14.Radiofrequency signal RF2 is transferred on the second table electrode 11 by the second matching network the 14, the 3rd Copper Foil 13 and the 3rd low temperature scolding tin 12, second transducer 10 absorbs radiofrequency signal, and radiofrequency signal is converted to ultrasound wave 28 is transferred in acousto-optic medium 1, incident illumination and ultrasound wave occur acoustic optic interaction to produce the first diffraction light in acousto-optic medium 1, and the first diffraction light is o light.
In like manner, the 3rd transducer 22 is installed on the second of acousto-optic medium and leads on sound face 27, and the 3rd weld layer 19 acousto-optic medium 1 welds together with the 3rd transducer 22.3rd table electrode 23 is positioned on the 3rd transducer 22, and the 6th 24, low temperature scolding tin the 6th Copper Foil 25 is welded on the 3rd table electrode 23, and the other end of the 6th Copper Foil 25 links together with the 3rd matching network 26.5th 20, low temperature scolding tin the 5th Copper Foil 21 is welded on the 3rd weld layer 19, and the 5th Copper Foil 21 links together with the ground of the 3rd matching network 26.Radiofrequency signal RF3 is transferred on the 3rd table electrode 23 by the 3rd matching network the 26, the 6th Copper Foil 25 and the 6th low temperature scolding tin 24,3rd transducer 22 absorbs radiofrequency signal, and radiofrequency signal is converted to ultrasound wave 28 is transferred in acousto-optic medium 1, incident illumination and ultrasound wave occur acoustic optic interaction to produce the second diffraction light in acousto-optic medium 1, and the second diffraction light is e light.
This utility model acousto-optic medium optical axis direction C is 100.5 °-101.5 ° with the angle theta of the direction K in logical sound face.The size of angle theta and the operation wavelength of acousto-optic turnable filter, operating frequency, diffraction light the factor such as spectral resolution relevant.Angle theta is the least, and the spectral resolution of diffraction light is the lowest, can not embody the high resolution advantage of acousto-optic turnable filter；Angle theta is too big, and the operating frequency of acousto-optic turnable filter is the highest, and square being directly proportional of the decay of ultrasound wave and frequency, cause ultrasonic attenuation very big, and then the efficiency of serious reduction diffraction light, thus this utility model determines that angle theta is 100.5 °-101.5 °.
All of Copper Foil is calendering copper, and its thickness is 5 μm-15 μm, and the Copper Foil ductility of this thickness and toughness are the best, with low temperature scolding tin, it is welded on table electrode, and light filter can be made to have extraordinary environmental suitability.The thickest Copper Foil hardness is relatively big, uses and may be delivered to table electrode by Copper Foil with the vibration in transportation, and then damages table electrode；Copper Foil is the thinnest, is all easily damaged, therefore can not use the thickest and the thinnest Copper Foil in manufacturing process and use.
Acousto-optic turnable filter table electrode length is generally both greater than 2mm, therefore the practical situation that the width of Copper Foil makes according to table electrode size and technique not less than 2mm(can suitably increase Copper Foil quantity and width), the overall width that such radiofrequency signal is transmitted from tow sides is just not less than 4mm.Calculate with 4mm, be at this moment 10 times of conventional filamentary silver (diameter 0.13mm) girth by the Copper Foil width of radiofrequency signal, according to the Kelvin effect of high-frequency signal, the efficiency of radio signal transmission thus can be greatly improved.Simultaneously as Copper Foil is the thinnest, and being calendering copper, its ductility and toughness are the best, therefore with low temperature scolding tin, it is welded on table electrode, light filter can be made to have extraordinary environmental suitability.
It addition, this utility model leads at acousto-optic medium 1 has been coated with antireflective film on bright finish, this antireflective film is less than 8% at the reflectance of visible ray (400nm to 1000nm) and two wave bands of medium wave (3000nm to 4500nm).It is coated with antireflective film and can reduce the loss of light energy, increase the energy entering photodetector, and then strengthen the definition of image, but owing to optical wavelength range is the widest, being difficult to realize the lowest reflectance at visible ray (400nm to 1000nm) and two wave bands of medium wave (3000nm to 4500nm), the index that can realize at present is less than 8% simultaneously.
Operation principle:
Transducer material is the lithium columbate crystal of X cut type, it is piezoquartz, its operating frequency is relevant with its thickness, the transducer of each thickness can only operate in certain range of frequency bandwidths, therefore the thickness of three transducers that this utility model uses is different, the thickness of the first transducer 3 is 13.5 μm-14.5 μm, and the thickness of the second transducer 10 is 24 μm-26 μm, and the thickness of the 3rd transducer 22 is 118 μm-122 μm.
The thickness of the first transducer 3 is 13.5 μm-14.5 μm, and the bandwidth range of its work is 220MHz to 120MHz.Radiofrequency signal RF1 of 220MHz to 120MHz is transferred on the first table electrode 4 by first matching network the 7, second Copper Foil 9 and the second low temperature scolding tin 8, first transducer 3 absorbs radiofrequency signal, and radiofrequency signal is converted to ultrasound wave 28 is transferred in acousto-optic medium 1, incident illumination and ultrasound wave occur acoustic optic interaction to produce the first diffraction light in acousto-optic medium 1, and the first diffraction light is o light.According to the ultimate principle of acousto-optic turnable filter, the wavelength of diffraction light becomes one-to-one relationship with the frequency of radiofrequency signal, and the operating wavelength range that the radiofrequency signal of 220MHz to 120MHz is corresponding is 400nm to 600nm.
In like manner, the thickness of the second transducer 10 is 24 μm-26 μm, and the bandwidth range of its work is 120MHz to 68MHz.Radiofrequency signal RF2 of 120MHz to 68MHz is transferred on the second table electrode 11 by the second matching network the 14, the 3rd Copper Foil 13 and the 3rd low temperature scolding tin 12, second transducer 10 absorbs radiofrequency signal, and radiofrequency signal is converted to ultrasound wave 28 is transferred in acousto-optic medium 1, incident illumination and ultrasound wave occur acoustic optic interaction to produce the first diffraction light in acousto-optic medium 1, and the first diffraction light is o light.Becoming relation one to one according to acousto-optic turnable filter diffraction light wavelength with radio frequency signal frequency, the operating wavelength range that the radiofrequency signal of 120MHz to 68MHz is corresponding is 600nm to 1000nm.
In like manner, the thickness of the 3rd transducer 22 is 118 μm-122 μm, and the bandwidth range of its work is 22MHz to 14MHz.Radiofrequency signal RF3 of 22MHz to 14MHz is transferred on the 3rd table electrode 23 by the 3rd matching network the 26, the 6th Copper Foil 25 and the 6th low temperature scolding tin 24,3rd transducer 22 absorbs radiofrequency signal, and radiofrequency signal is converted to ultrasound wave 28 is transferred in acousto-optic medium 1, incident illumination and ultrasound wave occur acoustic optic interaction to produce the second diffraction light in acousto-optic medium 1, and the second diffraction light is e light.Becoming relation one to one according to acousto-optic turnable filter diffraction light wavelength with radio frequency signal frequency, the operating wavelength range that the radiofrequency signal of 22MHz to 14MHz is corresponding is 3000nm to 4500nm.
The first diffraction light that first transducer 3 and the work of the second transducer 10 produce is input in visible-light detector 29, is input in image processing system 30 after being converted to the signal of telecommunication again；The second diffraction light that 3rd transducer 22 work produces is input in medium wave detector 31, is input in image processing system 30 after being converted to the signal of telecommunication again, and the signal of image processing system 30 input compares with internal database and just can recognize that detected target.
This utility model has all made transducer on two logical sound faces (first leads to sound face 18 and second leads to sound face 27) that acousto-optic medium is relative, first leads to and has made two transducers (first transducer 3 and the second transducer 10) on sound face 18, the bandwidth range of the two transducer work is 220MHz to 68MHz, and the operating wavelength range that at this moment light filter is corresponding is 400nm to 1000nm；Second leads to and has made a transducer on sound face 27, the thickness of this transducer is 118 μm-122 μm, the bandwidth range of its work is 22MHz to 14MHz, at this moment the operating wavelength range of light filter is 3000nm to 4500nm, therefore, this acousto-optic turnable filter operating wavelength range has taken into account visible ray (400nm to 1000nm) and two wave bands of medium wave (3000nm to 4500nm) simultaneously.
It should be noted that, during real work, first transducer 3 and the second transducer 10 not only to leach the o light of 400nm to 1000nm in the position of the first diffraction light, the e light of 400nm to 1000nm also can be leached in the position of the second diffraction light, but due to medium wave detector 31 will not occur photoelectric effect to the e light of 400nm to 1000nm, therefore the e light of 400nm to the 1000nm of the second diffraction light position can be neglected.Equally, 3rd transducer 22 not only to leach the e light of 3000nm to 4500nm in the position of the second diffraction light, the o light of 3000nm to 4500nm also can be leached in the position of the first diffraction light, but due to visible-light detector 29 will not occur photoelectric effect to the o light of 3000nm to 4500nm, therefore the o light of 3000nm to the 4500nm of the first diffraction light position can also be neglected.
Above-described embodiment of the present utility model is only for this utility model example is described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, change and the variation of other multi-forms can also be made on the basis of the above description.Here cannot all of embodiment be given exhaustive.Every belong to obvious change that the technical solution of the utility model amplified out or the variation row still in protection domain of the present utility model.
Claims (6)
1. medium wave acousto-optic turnable filter seen from a kind, including acousto-optic medium, transducer, table electrode and matching network, transducer is installed on the logical sound face of acousto-optic medium by weld layer, and table electrode is located at transducer face, and matching network is connected by welding lead and table electrode；It is characterized in that: described transducer is three, be separately mounted on two logical sound faces that acousto-optic medium is relative；Being provided with two transducers on one of them logical sound face, the thickness of the two transducer is respectively 24 μm-26 μm and 13.5 μm-14.5 μm, and the transducer of these two thickness makes light filter operation wavelength cover whole visible light wave range；Being provided with a transducer on another logical sound face, this transducer thickness is that 118 μm-122 μm are so that light filter is operated in medium wave band；Each transducer correspond to a set of table electrode, welding lead and matching network.
Visible medium wave acousto-optic turnable filter the most according to claim 1, it is characterized in that: the welding lead connecting all matching networks and table electrode is Copper Foil, Copper Foil one end is by eutectic welding tin welding on table electrode, and the matching network that the other end is corresponding with this table electrode links together.
Visible medium wave acousto-optic turnable filter the most according to claim 1, it is characterised in that: being connected to Copper Foil by eutectic welding soldering on the weld layer that each transducer is corresponding, the ground of the matching network that the Copper Foil other end is corresponding with this transducer links together.
4. according to the visible medium wave acousto-optic turnable filter described in Claims 2 or 3, it is characterised in that: described Copper Foil is calendering copper, and its thickness is 5 μm-15 μm, and width is not less than 2mm.
Visible medium wave acousto-optic turnable filter the most according to claim 1, it is characterised in that: the angle theta of acousto-optic medium optical axis direction C and the direction K in logical sound face is in the range of 100.5 °-101.5 °.
Visible medium wave acousto-optic turnable filter the most according to claim 1, it is characterised in that: leading at acousto-optic medium and be coated with antireflective film on bright finish, this antireflective film is respectively less than 8% at the reflectance of two wave bands of 400nm to 1000nm and 3000nm to 4500nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620423821.0U CN205581444U (en) | 2016-05-11 | 2016-05-11 | It is thus clear that adjustable filter of medium wave reputation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620423821.0U CN205581444U (en) | 2016-05-11 | 2016-05-11 | It is thus clear that adjustable filter of medium wave reputation |
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| CN205581444U true CN205581444U (en) | 2016-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105739136A (en) * | 2016-05-11 | 2016-07-06 | 中国电子科技集团公司第二十六研究所 | Visible medium wave acousto-optic adjustable light filter |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105739136A (en) * | 2016-05-11 | 2016-07-06 | 中国电子科技集团公司第二十六研究所 | Visible medium wave acousto-optic adjustable light filter |
| CN105739136B (en) * | 2016-05-11 | 2018-05-04 | 中国电子科技集团公司第二十六研究所 | Visible ray medium wave acousto-optic turnable filter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20200511 |