CN111580286A - Strong light prevention glasses based on electric control holographic grating - Google Patents
Strong light prevention glasses based on electric control holographic grating Download PDFInfo
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- CN111580286A CN111580286A CN202010547099.2A CN202010547099A CN111580286A CN 111580286 A CN111580286 A CN 111580286A CN 202010547099 A CN202010547099 A CN 202010547099A CN 111580286 A CN111580286 A CN 111580286A
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- control module
- illumination
- signal control
- glare
- liquid crystal
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- 239000011521 glass Substances 0.000 title claims abstract description 35
- 230000002265 prevention Effects 0.000 title description 4
- 238000005286 illumination Methods 0.000 claims description 41
- 239000004973 liquid crystal related substance Substances 0.000 claims description 22
- 229920000642 polymer Polymers 0.000 claims description 6
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 claims description 4
- 230000004313 glare Effects 0.000 claims description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical group [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000001093 holography Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 208000001140 Night Blindness Diseases 0.000 description 1
- 206010034960 Photophobia Diseases 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/101—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having an electro-optical light valve
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses an anti-glare glasses based on an electric control holographic grating, which is characterized by comprising a glasses frame and two lenses, wherein a layer of electric control holographic grating is packaged between two layers of glass of each lens, and two inner surfaces of the two layers of glass facing the electric control holographic grating are plated with conducting layers; the mirror holder middle part is equipped with light intensity sensor, and the position that mirror holder and two lenses meet all is embedded to have a signal control module, light intensity sensor's output and every signal control module's input are connected, and every signal control module's output positive negative pole is received respectively on two internal surface conducting layers of two-layer glass of corresponding lens. The invention can protect human eyes from being stimulated by strong light, and achieves the effect of preventing strong light.
Description
Technical Field
The invention relates to an anti-glare glasses based on an electric control holographic grating, and belongs to the technical field of optics.
Background
According to the statistics of relevant data, 30-40% of night car accidents are caused by abuse of high beam lights at night. When the eyes of a person are stimulated by the strong light of the vehicle lamp, the pupils automatically shrink from the normal 5-8 mm to 1 mm or even smaller, so that the light incoming amount is reduced to 1/30, and after the vehicle meets, the light incoming amount is suddenly reduced due to the fact that the pupils are not timely recovered, the phenomenon similar to night blindness occurs, and a plurality of traffic accidents occur.
The common light yellow night driving mirror can only block 20-30% of strong light, while the all-weather driving mirror can weaken the strong light, but the visual field of people is also darkened, so that the driving safety is influenced, and the driving mirror is easy to be in danger when being worn for night driving and does not meet the national standard of night driving glasses; if the polarized lens is worn, the light transmittance is lower than 50%, which causes the road surface to be unclear when the vehicle is driven at night, and driving danger is easy to occur.
Disclosure of Invention
The invention aims to provide anti-glare glasses based on an electric control holographic grating, which can protect human eyes from being stimulated by glare and achieve the effect of preventing glare.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the invention provides an anti-glare glasses based on an electric control holographic grating, which comprises a glasses frame and two lenses, wherein a layer of electric control holographic grating is packaged between two layers of glass of each lens, and two inner surfaces, facing the electric control holographic grating, of the two layers of glass are plated with conducting layers;
the mirror holder middle part is equipped with light intensity sensor, and the position that mirror holder and two lenses meet all is embedded to have a signal control module, light intensity sensor's output and every signal control module's input are connected, and every signal control module's output positive negative pole is received respectively on two internal surface conducting layers of two-layer glass of corresponding lens.
Further, the signal control module sets an illumination starting threshold, and the illumination starting threshold is determined by the ambient illumination and the adaptability of human eyes under the dark condition.
Further, if the ambient illuminance is less than or equal to the illuminance starting threshold, the voltage signal generated by the illuminance sensor is less than or equal to a specific voltage threshold corresponding to the illuminance starting threshold, and the output voltage of the signal control module is 0; if the ambient illumination exceeds the illumination starting threshold, the voltage signal generated by the illumination sensor exceeds a specific voltage threshold corresponding to the illumination starting threshold, and the output voltage of the signal control module is in a linear relation with the ambient illumination.
Further, a liquid crystal molecule horizontal orientation layer is arranged on the conducting layer, and if the output voltage of the signal control module is 0, liquid crystal molecules are horizontally arranged; if the output voltage of the signal control module is in a linear relation with the ambient illumination, the liquid crystal molecules deflect.
Further, the electrically controlled holographic grating is made of polymer dispersed liquid crystal by a holographic method, thereby forming a periodic structure in which liquid crystal and polymer are alternately distributed.
Further, the liquid crystal adopts positive liquid crystal.
Further, the thickness of the electric control holographic grating is not more than 20 μm.
Further, the conducting layer is an indium tin oxide conducting layer.
Compared with the prior art, the invention at least has the following beneficial effects:
the invention makes the incident strong light generate diffraction through the grating effect generated by the electric control holographic grating, thereby protecting human eyes from being stimulated by the strong light and achieving the function of preventing the strong light.
Drawings
FIG. 1 is a schematic structural diagram of glare-proof glasses based on an electrically-controlled holographic grating according to an embodiment of the present invention;
FIG. 2 is a schematic view of an antiglare spectacle lens based on an electrically controlled holographic grating according to an embodiment of the present invention;
fig. 3 is a diagram of the relationship between the output voltage of the signal control module and the ambient illumination.
In the figure: 1. a frame; 2. a lens; 3. an illuminance sensor; 4. a signal control module; 5. a liquid crystal; 6. a polymer.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-2, the glare-proof glasses based on the electrical control holographic grating according to the embodiment of the present invention include a frame 1 and two lenses 2, wherein a layer of electrical control holographic grating is encapsulated between two layers of glass of each lens, the thickness of the electrical control holographic grating is not more than 20 μm, and in this embodiment, the thickness of the electrical control holographic grating is 10 μm.
The appropriate grating period is set, so that when light with the wavelength lambda of 500nm is normally incident, only 1-order diffraction is achieved, mutual interference among diffraction of all levels is avoided, the 1-order diffraction angle is large enough to be separated from 0-order transmitted light and generate a large angle, the 1-order diffraction light does not affect the vision right ahead, the diffraction light sensitivity of human eyes with large angle is reduced, and the human eyes cannot be strongly stimulated.
In the present embodiment, the 1-order diffraction angle θ is 45 °, and the grating period d is 0.707 μm according to the grating equation dsin θ.
The electrically controlled holographic grating is made of Polymer Dispersed Liquid Crystal (PDLC) by a holographic method to form a periodic structure in which liquid crystal 5 and polymer 6 are alternately distributed, the liquid crystal 5 being a positive liquid crystal.
Two inner surfaces of the two layers of glass facing the electric control holographic grating are both plated with conducting layers, liquid crystal molecule horizontal orientation layers are arranged on the conducting layers, and in the embodiment, the conducting layers are indium tin oxide conducting layers.
The middle part of the spectacle frame 1 is provided with an illumination sensor 3, the positions of the spectacle frame 1, which are connected with the two lenses 2, are embedded with signal control modules 4, the output end of the illumination sensor 3 is connected with the input end of each signal control module, the illumination sensor 3 can convert optical signals into electric signals and transmit the electric signals to the signal control modules 4, and the positive and negative electrodes of the output end of each signal control module are respectively connected to two inner surface conducting layers of two layers of glass corresponding to the lenses.
The signal control module 4 sets an illumination starting threshold value EthThe illumination starting threshold is determined by the ambient illumination and the fitness of human eyes under dark conditions, in this embodiment, Eth20lux (lux, unit of ambient illumination).
As shown in FIG. 3, when the ambient illumination exceeds the illumination activation threshold EthThen, the output voltage V of the signal control module 4 is linearly related to the ambient illuminance E.
When strong light is incident, the ambient illumination E can reach the maximum, namely EmaxThe output voltage V of the signal control module 4 also reaches a maximum, i.e. V, of 300luxmaxAt 5V, the grating diffraction efficiency is highest.
When the strong light prevention glasses based on the electric control holographic grating provided by the invention are worn for driving at night, under the condition that the ambient illumination is less than or equal to 20lux, the voltage signal generated by the illumination sensor 3 is less than or equal to the illumination starting threshold value EthCharacteristic of 20luxThe voltage threshold is fixed, the output voltage of the signal control module 4 is 0, at the moment, the liquid crystal molecules on the conducting layer are horizontally arranged, and the extraordinary ray refractive index n of the liquid crystal 5 of the electric control holographic gratinge1.52, close to or consistent with the refractive index of the polymer 6, the ordinary refractive index n of the liquid crystal 5 of the electrically controlled holographic gratingo1.72 above its extraordinary refractive index neThe electric control holographic grating has no grating effect, and the invention is equivalent to common glasses;
under the condition that the ambient illumination is more than 20lux, namely, when strong light is incident, such as irradiation of a high beam lamp, the voltage signal generated by the illumination sensor 3 exceeds an illumination starting threshold EthWhen the specific voltage threshold corresponding to 20lux is reached, the output voltage of the signal control module 4 is in a linear relation with the ambient illumination, at this time, liquid crystal molecules on the conducting layer deflect, the refractive index of the extraordinary ray of the liquid crystal 5 of the electric control holographic grating is larger than that of the polymer 6, and the electric control holographic grating generates a grating effect to enable incident strong light to generate diffraction; the stronger the light intensity of the incident light, the greater the ambient illumination, the greater the output voltage of the signal control module 4, the higher the diffraction efficiency of the electric control holographic grating, the stronger the diffracted light, and the weaker the 0-level transmitted light, thereby protecting human eyes from being stimulated by strong light and achieving the effect of preventing strong light.
The embodiment of the invention does not adopt a polarized lens, so that under the condition of non-strong light, the light transmittance of the strong light prevention glasses based on the electric control holographic grating is not influenced by the electric control holographic grating, is equivalent to a common lens, and does not influence driving at night.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. An anti-glare glasses based on an electric control holographic grating is characterized by comprising a glasses frame and two lenses, wherein a layer of electric control holographic grating is packaged between two layers of glass of each lens, and two inner surfaces, facing the electric control holographic grating, of the two layers of glass are plated with conducting layers;
the mirror holder middle part is equipped with light intensity sensor, and the position that mirror holder and two lenses meet all is embedded to have a signal control module, light intensity sensor's output and every signal control module's input are connected, and every signal control module's output positive negative pole is received respectively on two internal surface conducting layers of two-layer glass of corresponding lens.
2. The glare-proof glasses based on electrically-controlled holographic gratings according to claim 1, wherein the signal control module sets an illumination starting threshold, and the illumination starting threshold is determined by ambient illumination and the adaptability of human eyes in dark conditions.
3. The glasses for preventing glare based on the electrically controlled holographic grating of claim 2, wherein if the ambient illumination is less than or equal to the illumination starting threshold, the voltage signal generated by the illumination sensor is less than or equal to a specific voltage threshold corresponding to the illumination starting threshold, and the output voltage of the signal control module is 0; if the ambient illumination exceeds the illumination starting threshold, the voltage signal generated by the illumination sensor exceeds a specific voltage threshold corresponding to the illumination starting threshold, and the output voltage of the signal control module is in a linear relation with the ambient illumination.
4. The glare-proof glasses based on the electric control holographic grating as claimed in claim 3, wherein the conductive layer is provided with a liquid crystal molecule horizontal orientation layer, and if the output voltage of the signal control module is 0, the liquid crystal molecules are horizontally arranged; if the output voltage of the signal control module is in a linear relation with the ambient illumination, the liquid crystal molecules deflect.
5. Glare-proof glasses based on electrically controlled holographic gratings according to claim 1, characterized in that the electrically controlled holographic gratings are made of polymer dispersed liquid crystal by holography, thus forming a periodic structure with liquid crystal and polymer alternately distributed.
6. The glare-proof glasses based on electrically-controlled holographic gratings of claim 5, wherein the liquid crystal is a positive liquid crystal.
7. Glare-proof glasses based on electrically controlled holographic gratings according to claim 1, wherein the thickness of the electrically controlled holographic gratings does not exceed 20 μm.
8. The glare-proof glasses based on electrically controlled holographic gratings of claim 1, wherein the conductive layer is an indium tin oxide conductive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547099.2A CN111580286A (en) | 2020-06-16 | 2020-06-16 | Strong light prevention glasses based on electric control holographic grating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547099.2A CN111580286A (en) | 2020-06-16 | 2020-06-16 | Strong light prevention glasses based on electric control holographic grating |
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| CN111580286A true CN111580286A (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010547099.2A Pending CN111580286A (en) | 2020-06-16 | 2020-06-16 | Strong light prevention glasses based on electric control holographic grating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113485029A (en) * | 2021-08-10 | 2021-10-08 | 南方科技大学 | Laser protective glasses and implementation method thereof |
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|---|---|---|---|---|
| CN1492259A (en) * | 2003-09-04 | 2004-04-28 | 上海理工大学 | Method for producing tunable optical fiber attenuator |
| KR20130091872A (en) * | 2012-02-09 | 2013-08-20 | (주) 키프트 | Electronic sunglasses and method for driving the same |
| CN204155042U (en) * | 2014-08-04 | 2015-02-11 | 宁波大学 | A kind of automatically controlled diffraction optical device |
| CN104407450A (en) * | 2014-05-04 | 2015-03-11 | 丹阳博来腾光电科技有限公司 | Design method of anti-dazzle liquid crystal spectacles and device |
| CN104678574A (en) * | 2013-12-02 | 2015-06-03 | 原相科技股份有限公司 | Glasses with adjustable light transmittance and method for adjusting light transmittance |
| US20200089025A1 (en) * | 2018-09-13 | 2020-03-19 | Wicue, Inc. | Dimmable eyewear |
-
2020
- 2020-06-16 CN CN202010547099.2A patent/CN111580286A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492259A (en) * | 2003-09-04 | 2004-04-28 | 上海理工大学 | Method for producing tunable optical fiber attenuator |
| KR20130091872A (en) * | 2012-02-09 | 2013-08-20 | (주) 키프트 | Electronic sunglasses and method for driving the same |
| CN104678574A (en) * | 2013-12-02 | 2015-06-03 | 原相科技股份有限公司 | Glasses with adjustable light transmittance and method for adjusting light transmittance |
| CN104407450A (en) * | 2014-05-04 | 2015-03-11 | 丹阳博来腾光电科技有限公司 | Design method of anti-dazzle liquid crystal spectacles and device |
| CN204155042U (en) * | 2014-08-04 | 2015-02-11 | 宁波大学 | A kind of automatically controlled diffraction optical device |
| US20200089025A1 (en) * | 2018-09-13 | 2020-03-19 | Wicue, Inc. | Dimmable eyewear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113485029A (en) * | 2021-08-10 | 2021-10-08 | 南方科技大学 | Laser protective glasses and implementation method thereof |
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Application publication date: 20200825 |
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