CN104068961B - Light brush therapeutic equipment - Google Patents
Light brush therapeutic equipment Download PDFInfo
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- CN104068961B CN104068961B CN201410346156.5A CN201410346156A CN104068961B CN 104068961 B CN104068961 B CN 104068961B CN 201410346156 A CN201410346156 A CN 201410346156A CN 104068961 B CN104068961 B CN 104068961B
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Abstract
The invention provides light brush therapeutic equipment. The equipment comprises a blue optical filter, a polarizing film, a controllable optical rotation component, an eyepiece, and a control device connected with the controllable optical rotation component arranged in sequence, wherein incident light enters from the blue optical filter to obtain polarized light through the polarization film; the polarized light passes through the controllable optical rotation component which controls the polarized light to deflect according to the cyclical control signal output by the control device and then exits from the eyepiece; the polarization direction of the output polarized light rotates or sways in a preset angle range under the function of the control signal. The controllable optical rotation component is a longitudinal electrooptic effect optical rotation component or a transverse electrooptic effect optical rotation component or a magnetic optical rotation component. The equipment is simple in structure, low in cost, small in noise, light and handy as well as agile, low in failure rate, and high in regulate and control precision.
Description
【Technical field】
The present invention relates to optical field, refer in particular to a kind of light brush treatment being applied to ophthalmology amblyopia treatment
Instrument.
【Background technology】
The physiological principle of light brush therapeutic equipment is based on moment sea fourth grignard brush effect.Moment sea fourth grignard brush effect
Should refer to when curer eyes watch blue high light attentively by the polaroid of one piece of rotation, in this eye note
The immediate vicinity of apparent direction can persistently see the image of similar high speed propeller.Moment sea fourth grignard
Brush effect, we are referred to as light brush effect.Light brush effect is only present on central fovea of macula, because macula lutea
Central fovea is the most sensitive region of ocular vision.Patient watches one attentively like brush from the eyepiece of light brush therapeutic equipment
Or the image of screw, this effect only comes across the most sensitive macula retinae area of vision, by watching light attentively
Brush activation macula area cones, makes paracentral fixation gradually move to center recess, thus improving eyesight,
Reach healing purpose.The therapeutic equipments that principle makes accordingly is exactly light brush therapeutic equipment.The treatment of light brush was both suitable for
In the treatment of eyes paracentral fixation amblyopia, it is also applied for the corresponding treatment of eyes abnormal retinal.
Light brush effect in traditional light brush therapeutic equipment is to rotate one to be placed in white using mechanical mechanism
Post the blue-tinted transparent disk of polarizer to realize after light source.This kind of light brush therapeutic equipment is because past using motor
Toward the noise that meeting producing ratio is larger, simultaneously because using motion, structure is sufficiently complex, also heavier,
Cost of manufacture is high, and instrument imaging control accuracy is poor, and the fault rate of instrument is higher.
Therefore it provides a kind of structure is simple, low cost, control accuracy are high, fault rate is low, noise is little,
Lightly nimble light brush therapeutic equipment is actually necessary.
【Content of the invention】
It is an object of the invention to provide a kind of structure is simple, noise is little, lightly nimble light brush therapeutic equipment.
For realizing the object of the invention, provide technical scheme below：
The present invention provides a kind of light brush therapeutic equipment, blue color filter that it includes setting gradually, polarizer,
The control device that controlled optically-active element, eyepiece are connected with controlled optically-active element, incident light is by blue filter
Piece is incident, obtains polarised light via polarizer, then via controlled optically-active element, this controlled optically-active element
Polarised light is controlled to produce deflection according to the cyclic control signal of control device output, then from eyepiece outgoing,
The polarization direction of the polarised light of output can rotate or in the angle setting under described control signal acts on
In the range of swing, this controlled optically-active element be longitudinal electro-optic effect optically-active element or cross electro-optical effect rotation
Optical element or magnetic rotation element.
Light brush therapeutic equipment of the present invention to be realized compared with carrying out rotatory polarization piece using mechanical mechanism in prior art
Traditional light brush therapeutic equipment of optically-active, structure is simpler, does not have the frame for movement of heaviness to become more lightly spirit
Just, using controlled optically-active element, the polarization direction of the polarised light being exported through polarizer is controlled partially
Turn, be the optical rotation phenomenon that cleverly make use of polarised light, the thinking orientation breaking traditions, creative
Thinking and prominent substantive distinguishing features, and avoid that the heaviness of traditional mechanical structure, noise be big, fault
The shortcomings of rate is high, light brush therapeutic equipment structure of the present invention is simple, low cost, noise are little, lightly nimble, event
Barrier rate is low, and, utilizes controlled optically-active element, the control signal relatively more easily spirit of its control device
Live regulation and control, and control accuracy is high, therefore, the present invention has and significantly improves.
Preferably, the polarization direction of polarizer can predefine as needed.
Preferably, when this controlled optically-active element is longitudinal electro-optic effect optically-active element, this longitudinal electric light effect
It is provided with euphotic electrode, this control device is control circuit, this control circuit passes through control before and after answering optically-active element
Holding wire processed is connected with this euphotic electrode respectively, and exports cyclic control signal, and this control signal is control
Voltage signal processed.When using longitudinal electro-optic effect optically-active element, longitudinal electric light that is consequently exerted at of control is imitated
Answer the voltage between euphotic electrode before and after optically-active element, output polarization can be changed by changing control voltage
The optically-active angle of light, thus control the polarization direction of polarised light to rotate or swing.
Preferably, when this controlled optically-active element is cross electro-optical effect optically-active element, this control device is
Control circuit, this control circuit passes through control signal wire respectively with this cross electro-optical effect optically-active element two
Side pole plate connects, and exports cyclic control signal, and this control signal is control voltage signal.
Preferably, when this controlled optically-active element is magnetic rotation element, this control device is control circuit
And connecting the coil of control circuit, this magnetic rotation element is arranged in coil magnetic field, this control circuit
It is connected with the coil two ends producing magnetic field respectively by control signal wire, and export cyclic control signal,
This control signal is control electric current signal.
Preferably, the polarization direction of the polarised light of output can rotate under control signal effect.
Preferably, the waveform controlling the control signal of polarization light polarization direction rotation of output is sawtooth waveforms,
The minimum of a value of this sawtooth waveforms and maximum corresponding optically-active differential seat angle are the integral multiples of 180 degree.
Preferably, the polarization direction of the polarised light of output can be in the angle setting under control signal effect
In the range of swing.
Preferably, the control signal waveform controlling the polarization light polarization direction swing of output is triangular wave or just
The consecutive variations waveform such as string ripple.Preferably, the signal minimum in each cycle of control signal waveform and maximum
The polarization direction of the corresponding emergent light of intermediate value of value is horizontally oriented.Preferably, the signal in each cycle is
Little value and maximum corresponding optically-active differential seat angle if desired less than or be equal to 180 degree.
Preferably, the rotary speed of the polarization light polarization direction of output dynamically becomes with control signal time-varying characteristics
Change and change.For the enforcement using longitudinal electro-optic effect optically-active element or cross electro-optical effect optically-active element
Example, can change speed of rotation by the time-varying characteristics of control voltage；For using magnetic rotation element
Embodiment, the rotary speed of the polarization light polarization direction of output can become with control electric current dynamic change
Change.
Preferably, the swing speed of the polarization light polarization direction of output dynamically becomes with control signal time-varying characteristics
Change and change.For the enforcement using longitudinal electro-optic effect optically-active element or cross electro-optical effect optically-active element
Example, can change the swing speed of output polarization light polarization direction by the time-varying characteristics of control voltage；Right
In the embodiment using magnetic rotation element, the swing speed of the polarization light polarization direction of output can be with control
Power frequency processed changes and changes.
Preferably, the amplitude of fluctuation of the polarization light polarization direction of output dynamically becomes with control signal Magnitude Difference
Change and change.For the enforcement using longitudinal electro-optic effect optically-active element or cross electro-optical effect optically-active element
Example, the amplitude of fluctuation of the polarization light polarization direction of output can become with the change of control voltage Magnitude Difference
Change；For the embodiment using magnetic rotation element, the amplitude of fluctuation of the polarization light polarization direction of output can
To change with the change of control electric current Magnitude Difference.
Preferably, this cross electro-optical effect optically-active element or longitudinal electro-optic effect optically-active element can adopt liquid crystal
The automatically controlled wave plate of box, lithium niobate, potassium dihydrogen phosphate (KDP) pockels cell and potassium dideuterium phosphate (DKDP)
Any of which such as pockels cell.
Preferably, this magnetic rotation element can be the paramagnetic of high Verdet constant or inverse magnetic rotation glass.
Contrast prior art, the present invention has advantages below：
Light brush therapeutic equipment of the present invention is simpler, more lightly nimble compared with prior art construction, low cost,
Noise is little, lightly nimble, fault rate low, and control accuracy is high.
【Brief description】
Fig. 1 is that the light path element of light brush therapeutic equipment of the present invention arranges schematic diagram；
Fig. 2 is the structural representation of the embodiment one of light brush therapeutic equipment of the present invention；
Fig. 3 is the structural representation of the embodiment two of light brush therapeutic equipment of the present invention；
Fig. 4 is the structural representation of the embodiment three of light brush therapeutic equipment of the present invention；
Fig. 5 is the cyclic control signal schematic diagram that in the present invention, hypotenuse is the sawtooth waveforms ramping；
Fig. 6 is a kind of periodicity of the sawtooth waveforms of the curve that uphill process is accelerated first quick and back slow again for hypotenuse
Control signal schematic diagram；
Fig. 7 is a kind of periodicity control of the sawtooth waveforms of the first rear slowly curve slowing down again soon of uphill process for hypotenuse
Signal schematic representation processed；
Fig. 8 is the cyclic control signal schematic diagram of the sawtooth waveforms of straight line decline for hypotenuse；
Fig. 9 is a kind of periodicity of the sawtooth waveforms of the curve that decline process is accelerated first quick and back slow again for hypotenuse
Control signal schematic diagram；
Figure 10 is a kind of periodicity of the sawtooth waveforms of the first rear slowly curve slowing down again soon of decline process for hypotenuse
Control signal schematic diagram；
Figure 11 is the cyclic control signal schematic diagram of the triangular wave of straight line for hypotenuse；
Figure 12 is that the cyclic control signal of the crest curve ripple parallel with time shaft with the tangent line of trough shows
It is intended to；
The cyclic control signal schematic diagram of the curve ripple that Figure 13 is crest and trough is all pinnacle.
【Specific embodiment】
Refer to Fig. 1, light brush therapeutic equipment of the present invention includes blue color filter 100, the polarizer setting gradually
200th, the control device 500 that controlled optically-active element 300, eyepiece 400 are connected with controlled optically-active element, enters
Penetrate light incident by blue color filter 100, obtain polarised light via polarizer 200, then via controlled optically-active
Element 300, this controlled optically-active element 300 controls according to the cyclic control signal that control device 500 exports
Polarised light produces deflection, then from eyepiece 400 outgoing, the polarization direction of the polarised light of output is in described control
Can rotate under signal function or swing in the angular range setting.The polarization direction of polarizer 200 can
To predefine as needed.
Refer to Fig. 2, specifically in embodiment one, this controlled optically-active element is longitudinal electro-optic effect optically-active
Element 310, is provided with euphotic electrode (sign), specifically before and after this longitudinal electro-optic effect optically-active element 310
In embodiment, this longitudinal electro-optic effect optically-active element 310 can plate the TN liquid crystal of ITO electrode using front-back
Box, or this longitudinal electro-optic effect optically-active element 310 is using the automatically controlled wave plate of lithium niobate, potassium dihydrogen phosphate (KDP)
Pockels cell and potassium dideuterium phosphate (DKDP) pockels cell etc..This longitudinal electro-optic effect optically-active element
Most preferred embodiment is liquid crystal cell, and low cost should be made good use of.The polarization direction of polarizer can be chosen to be level side
To.
This control device be control circuit 510, this control circuit 510 pass through control signal wire 600 respectively with
This euphotic electrode connects, and exports cyclic control signal, and this control signal is control voltage signal, control
System be consequently exerted at the voltage between euphotic electrode before and after longitudinal electro-optic effect optically-active element, can be by changing
Control voltage come to change output polarised light optically-active angle, thus control polarised light polarization direction rotate or
Swing.
If necessary to the blue polarization light polarization direction rotation of output, it is applied to longitudinal electro-optic effect optically-active unit
Before and after part 310, the waveform of the control voltage between euphotic electrode can be Changing Pattern such as one of Fig. 5-Figure 10 institute
The sawtooth waveforms showing.The minimum of a value in each cycle of sawtooth voltage and maximum corresponding optically-active differential seat angle are
180 degree, the corresponding optical direction of Fig. 5-Fig. 7 and the corresponding optical direction of Fig. 8-Figure 10 are contrary.Speed of rotation
Can change with the change of control voltage frequency, the corresponding speed of rotation of different voltage waveform can be at the uniform velocity
Or the speed change of a certain rule, according to liquid crystal cell as longitudinal electro-optic effect optically-active element, this waveform
Corresponding relation is relevant with the characteristic of liquid crystal cell, after selected liquid crystal cell and light path, at the uniform velocity corresponding waveform and its
The corresponding waveform of his Changing Pattern is assured that.
Blue polarization light polarization direction if necessary to output swings, and is applied to longitudinal electro-optic effect optically-active unit
Before and after part 310, the waveform of the control voltage between euphotic electrode is Changing Pattern as shown in one of Figure 11-Figure 13
The consecutive variations waveform such as triangular wave or sine wave.The voltage minimum in each cycle and the intermediate value pair of maximum
The polarization direction of the emergent light answered is horizontally oriented, and the voltage minimum in each cycle and maximum are corresponding
Optically-active differential seat angle if desired less than or be equal to 180 degree.The swing of the blue polarization light polarization direction of output
Speed can change with the change of control voltage frequency.The amplitude of fluctuation of the blue polarization light polarization direction of output
Degree can change with the change of control voltage Magnitude Difference.
Refer to Fig. 3, in embodiment two, this controlled optically-active element is cross electro-optical effect optically-active element
320, this control device is control circuit 520, and this 320 liang of lateral electrode of cross electro-optical effect optically-active element is (not
Indicate) respectively connect control circuit 520 control signal wire 600, in specific embodiment, this longitudinal electric light
Effect optically-active element 310 can adopt liquid crystal cell, the automatically controlled wave plate of lithium niobate, potassium dihydrogen phosphate (KDP) Pu Keer
Any of which such as this box and potassium dideuterium phosphate (DKDP) pockels cell.In Fig. 3, this horizontal electric light effect
Optically-active element is answered to be automatically controlled 1/2 wave plate of the electroded lithium niobate in both sides.The polarization direction of polarizer can be selected
For horizontal direction.
This control circuit 520 pass through control signal wire 600 respectively with cross electro-optical effect optically-active element 320
Both sides battery lead plates connect, and export periodicity control voltage signal, control be consequently exerted at horizontal electric light
Voltage between effect optically-active element electrode, can change the rotation of output polarised light by changing control voltage
Angular, thus control the polarization direction of polarised light to rotate or swing.
If necessary to the blue polarization light polarization direction rotation of output, it is applied to cross electro-optical effect optically-active unit
The waveform of the interelectrode control voltage of part can be sawtooth waveforms as shown in one of Fig. 5-Figure 10 for the Changing Pattern.
The minimum of a value in each cycle of sawtooth voltage and maximum corresponding optically-active differential seat angle are 180 degrees, Fig. 5-Fig. 7
Corresponding optical direction and the corresponding optical direction of Fig. 8-Figure 10 are contrary.Speed of rotation can be with control voltage
Frequency changes and changes, and the corresponding speed of rotation of different voltage waveform can be at the uniform velocity or a certain rule
Speed change, according to automatically controlled 1/2 wave plate of lithium niobate as cross electro-optical effect optically-active element, this waveform corresponds to
Relation is relevant with the characteristic of automatically controlled 1/2 wave plate of the electroded lithium niobate in both sides, the electroded lithium niobate in both sides electricity
Control the structure of 1/2 wave plate and light path fixing after, at the uniform velocity corresponding waveform and the corresponding waveform of other Changing Patterns
It is assured that.
Blue polarization light polarization direction if necessary to output swings, and is applied to cross electro-optical effect optically-active unit
The waveform of the interelectrode control voltage of part is triangular wave as shown in one of Figure 11-Figure 13 for the Changing Pattern or just
The consecutive variations waveform such as string ripple.The corresponding emergent light of intermediate value of the voltage minimum in each cycle and maximum
Polarization direction be horizontally oriented, the voltage minimum in each cycle and maximum corresponding optically-active differential seat angle
If desired less than or be equal to 180 degree.The swing speed of the blue polarization light polarization direction of output can be with
Control voltage frequency changes and changes.The amplitude of fluctuation of the blue polarization light polarization direction of output can be with control
Voltage amplitude difference processed changes and changes.
Refer to Fig. 4 it is preferred that in embodiment three, this controlled optically-active element is magnetic rotation element
330, this control device is control circuit 530 and coil 540, and this control circuit 530 is believed by control
Number line 600 is connected with coil 540 two ends producing magnetic field respectively, and this magnetic rotation element 330 is arranged on
In coil 540 magnetic field, the control signal that control circuit 530 produces is consequently exerted at the coil 540 producing magnetic field
In electric current.In specific embodiment, this magnetic rotation element 330 can be the paramagnetic of high Verdet constant
Or inverse magnetic rotation glass etc..The polarization direction of polarizer can be chosen to be horizontal direction.
If necessary to the blue polarization light polarization direction rotation of output, it is applied to the control electricity on coil 540
Stream waveform can be sawtooth waveforms as shown in one of Fig. 5-Figure 10 for the Changing Pattern, sawtooth current each
The minimum of a value in cycle and maximum corresponding optically-active differential seat angle are 180 degrees, the corresponding optically-active side of Fig. 5-Fig. 7
To contrary with the corresponding optical direction of Fig. 8-Figure 10.Speed of rotation can be with the change of control electric current frequency
Change, the corresponding speed of rotation of different current waveform can be at the uniform velocity or a certain rule speed change, should
Waveform corresponding relation is relevant with the characteristic of coil 540 with magnetic rotation element 330, magnetic rotation element 330
After fixing with the structure of coil 540 and light path, at the uniform velocity corresponding waveform and the corresponding ripple of other Changing Patterns
Shape is assured that.
Blue polarization light polarization direction if necessary to output swings, and is applied to the control electricity on coil 540
The waveform of stream is the consecutive variations ripples such as triangular wave as shown in one of Figure 11-Figure 13 for the Changing Pattern or sine wave
Shape, the polarization direction of the current minimum in each cycle and the corresponding emergent light of the intermediate value of maximum is level
Direction, the current minimum in each cycle and maximum corresponding optically-active differential seat angle if desired less than or wait
In 180 degree.The swing speed of the blue polarization light polarization direction of output can change with control electric current frequency
And change, the amplitude of fluctuation of the blue polarization light polarization direction of output can become with control electric current Magnitude Difference
Change and change.
The waveform of above-mentioned control signal is to obtain the physics it is necessary to practical devices through test experiments research institute
Parameter carries out actual test, i.e. the relation curve of tests polarization light optically-active angle and control signal, thus
Can design specific control waveform.
The foregoing is only presently preferred embodiments of the present invention, protection scope of the present invention is not limited thereto,
Any belonged within the scope of the present invention based on the equivalent transformation in technical solution of the present invention.
Claims (10)
1. a kind of light brush therapeutic equipment is it is characterised in that its blue color filter, partially of including setting gradually
Shake the control device that piece, controlled optically-active element, eyepiece be connected with controlled optically-active element, and incident light is by indigo plant
Colo(u)r filter is incident, obtains polarised light via polarizer, then via controlled optically-active element, this controlled rotation
Optical element controls polarised light to produce deflection according to the cyclic control signal that control device exports, then from eyepiece
Outgoing, the polarization direction of the polarised light of output can rotate or in setting under described control signal acts on
Swing in angular range, this controlled optically-active element is longitudinal electro-optic effect optically-active element or horizontal electric light effect
Answer optically-active element or magnetic rotation element.
2. light brush therapeutic equipment as claimed in claim 1 is it is characterised in that when this controlled optically-active element is
During longitudinal electro-optic effect optically-active element, this control device is control circuit, this longitudinal electro-optic effect optically-active unit
It is provided with euphotic electrode, this control circuit is connected with this euphotic electrode respectively by control signal wire before and after part,
And exporting cyclic control signal, this control signal is control voltage signal.
3. light brush therapeutic equipment as claimed in claim 1 is it is characterised in that when this controlled optically-active element is
During cross electro-optical effect optically-active element, this control device is control circuit, and this control circuit is believed by control
Number line is connected with the both sides pole plate of this cross electro-optical effect optically-active element respectively, and exports and periodically control letter
Number, this control signal is control voltage signal.
4. light brush therapeutic equipment as claimed in claim 1 is it is characterised in that when this controlled optically-active element is
During magnetic rotation element, this control device is control circuit and the coil connecting control circuit, this mangneto
Optically-active element is arranged in coil magnetic field, this control circuit pass through control signal wire respectively with produce magnetic field
Coil two ends connect, and export cyclic control signal, and this control signal is control electric current signal.
5. the light brush therapeutic equipment as described in any one of Claims 1 to 4 it is characterised in that output polarization
The polarization direction of light can rotate under control signal effect, controls the polarization light polarization direction rotation of output
Control signal waveform be sawtooth waveforms, the minimum of a value of this sawtooth waveforms and maximum corresponding optically-active differential seat angle
It is the integral multiple of 180 degree.
6. the light brush therapeutic equipment as described in any one of Claims 1 to 4 it is characterised in that output polarization
The polarization direction of light can swing under control signal effect in the angular range setting, and controls output
The control signal waveform that polarization light polarization direction swings is triangular wave or sine wave.
7. the light brush therapeutic equipment as described in any one of Claims 1 to 4 it is characterised in that output polarization
The rotary speed of light polarization direction or swing speed change with control signal time-varying characteristics dynamic change.
8. the light brush therapeutic equipment as described in any one of Claims 1 to 4 it is characterised in that output polarization
The amplitude of fluctuation of light polarization direction changes with control signal Magnitude Difference dynamic change.
9. light brush therapeutic equipment as claimed in claim 2 or claim 3 is it is characterised in that this cross electro-optical effect
Optically-active element or longitudinal electro-optic effect optically-active element adopt liquid crystal cell, the automatically controlled wave plate of lithium niobate, biphosphate
Potassium (KDP) pockels cell and potassium dideuterium phosphate (DKDP) pockels cell any of which.
10. light brush therapeutic equipment as claimed in claim 4 is it is characterised in that this magnetic rotation element is
The paramagnetic of high Verdet constant or inverse magnetic rotation glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410346156.5A CN104068961B (en) | 2014-07-18 | 2014-07-18 | Light brush therapeutic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410346156.5A CN104068961B (en) | 2014-07-18 | 2014-07-18 | Light brush therapeutic equipment |
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| CN104068961A CN104068961A (en) | 2014-10-01 |
| CN104068961B true CN104068961B (en) | 2017-02-08 |
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| CN201410346156.5A Active CN104068961B (en) | 2014-07-18 | 2014-07-18 | Light brush therapeutic equipment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016008162A1 (en) * | 2014-07-18 | 2016-01-21 | 深圳市艾尔曼医疗电子仪器有限公司 | Light brush therapeutic apparatus |
| CN113812919B (en) * | 2021-04-26 | 2023-07-14 | 长春理工大学 | Macula lutea testing device and method based on polarization perception space-time sensitivity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221889Y (en) * | 1995-03-03 | 1996-03-13 | 尹永日 | Sunshade glasses for driving motor cycle |
| CN2875382Y (en) * | 2005-07-15 | 2007-03-07 | 沈晔 | Haidinger's brush typoscope |
| CN102385176A (en) * | 2005-06-20 | 2012-03-21 | 日本电信电话株式会社 | Electrooptic device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3541609B2 (en) * | 1997-02-26 | 2004-07-14 | 富士ゼロックス株式会社 | Optical deflecting element and image forming apparatus using the same |
-
2014
- 2014-07-18 CN CN201410346156.5A patent/CN104068961B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221889Y (en) * | 1995-03-03 | 1996-03-13 | 尹永日 | Sunshade glasses for driving motor cycle |
| CN102385176A (en) * | 2005-06-20 | 2012-03-21 | 日本电信电话株式会社 | Electrooptic device |
| CN2875382Y (en) * | 2005-07-15 | 2007-03-07 | 沈晔 | Haidinger's brush typoscope |
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