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CN105629509B - A kind of clean type anti-blue light spectacle lens - Google Patents

A kind of clean type anti-blue light spectacle lens Download PDF

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Publication number
CN105629509B
CN105629509B CN201610104862.8A CN201610104862A CN105629509B CN 105629509 B CN105629509 B CN 105629509B CN 201610104862 A CN201610104862 A CN 201610104862A CN 105629509 B CN105629509 B CN 105629509B
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China
Prior art keywords
film layer
blue light
layer
spectacle lens
substrate
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CN201610104862.8A
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Chinese (zh)
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CN105629509A (en
Inventor
侯绪华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Yu Li optical glasses Co., Ltd.
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Jiangsu Yu Li Optical Glasses Co Ltd
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Priority to CN201610104862.8A priority Critical patent/CN105629509B/en
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    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/10Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/18Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Optical Filters (AREA)

Abstract

One kind both playing antireflective effect, clean type anti-blue light spectacle lens with extremely strong dust-proof effect again, with metha crylic substrate, vapor deposition has film layer on the front principal plane of the substrate and back interarea, front principal plane film layer includes the first hard conating successively from inside to outside, first anti-scratch wearing layer, anti-blue light reflective coating, first anti-reflection film layer, first dust-proof film layer, first cleaning film layer, back interarea includes the second hard conating successively from inside to outside, second anti-scratch wearing layer, second anti-reflection film layer, green light antireflective coating, second dust-proof film layer, second cleaning film layer, the first cleaning film layer and second cleans film layer by ethoxy nonafluorobutane and perfluoro butyl ethyl propyl ether according to 4:1 proportioning is formulated.

Description

A kind of clean type anti-blue light spectacle lens
Technical field
The present invention relates to a kind of anti-blue light spectacle lens, especially a kind of clean type anti-blue light spectacle lens.
Background technology
In the prior art, the research of anti-blue light spectacle lens is like a raging fire, especially as the development of Internet technology, including it is anti- The anti-radiation glasses of blue light ultraviolet radiation preventing are used widely.Generally, it is seen that optical band is approximately from 380 nanometers (nm) wavelength to the wavelength of 780nm spectral region.The part of about 380nm to about 500nm correspond essentially to high energy blue light.It is blue Damage of the light to human eye especially retina be it is prodigious, if human eye for a long time exposure may result under blue light it is serious Ophthalmology disease, such as age-related maculopathy seriously even result in human eye blindness.But, in above-mentioned blue wave band 465nm to 495nm part be conducive to health because related to human biological's period, can promote blood circulation.It is existing Have safety goggles against radiation filtering generally includes ultraviolet light and most of short-wave band visible light.And rarely have reservation to be higher than in the prior art The anti-blue light glasses of 465nm, reason are relatively narrow in the wave band, are filtering 450nm and when shorter wavelength, can't help just filtering The blue light of 465nm or more is fallen.The high-reflecting film or optical filter used in existing anti-blue light glasses is usually all wide area type diaphragm, because For Narrowband Spectral High-Reflectivity Filter Multilayers or optical filter, when vacuum evaporation deposits, process is overflow long and complex, and manufacturing cost is high.On the other hand, even if Using spike filter, the harmful blue light to come from spectacle lens front surface reflection is filtered, but is derived between wearer rear Connecing light can then be reflected into the eye of eyeglass wearer in an identical manner, and the harmful blue light light that these reach wearer's retina is logical Amount can be suitable with front incidence, causes blue light to injure wearer's eyes.
It is well known that in anti-harmful blue light eyeglass, front and rear surfaces can apply UV coatings, to absorb UV light, also The coating of some other functions, such as impact-resistant coating, wear-resistant coating, anti-reflection coating, antistatic coating, polarizing coating and Anti-pollution layer and/or anti-fog coating etc., and eyeglass sheet is as a transparent substrate made of organic resin or glass, such as The materials such as thermoplastic polymer are made.
The thermoplastic material for using in the substrate, such as (methyl) acrylate copolymer, polyethylene (methyl-prop E pioic acid methyl ester) (PMMA), thio (methyl) acrylic acid, polyvinyl butyral (PVB), makrolon (PC), polyurethane (PU), Polyethylene (thioxanthamide), polyalcohol allyl carbonate, Ethylene/vinyl acetate, also such as poly- terephthaldehyde Sour second diester (PET) or polybutylene terephthalate (PBT), polycyclic sulphur compound, polyepoxide, makrolon and polyester Copolymer, the copolymer of cyclenes copolymer such as ethylene and norbornene or the copolymer of ethylene and cyclopentadiene and Combination thereof etc..
In the prior art, reducing blue light injury and the requirement of increase light transmittance can not often get both, and attend to one thing and lose sight of another, this disappears that It is long, to reduce blue light injury, it is necessary to sacrifice light transmittance as cost.Existing motion is proposed in such as acrylic acid series substrate Front and rear surfaces plated film, including antireflective coating or anti-reflection film etc., to reach antireflective effect while anti-blue light injures.Adopt With the different structure of this front and rear surfaces membrane system, front surface film layer efficiently prevents injury of the blue light to human eye, rear surface film layer from increasing The transmitance for adding eyeglass reaches antireflective effect.
Based on this, extreme influence transmitance can also be influenced anti-harmful blue light effect, institute by lens surface cleannes To also play very crucial effect positioned at the outermost clean film of eyeglass, which in turn can produce other film layers Raw opposite effects, so, in technique, the research about clean film is also an important topic.
The project that the present invention is studied is to provide a kind of clean type anti-blue light spectacle lens.
Invention content
In view of above-mentioned technical problem, the present invention provides one kind and not only playing antireflective effect, but also has extremely strong dust-proof effect Anti- harmful blue light spectacle lens.
Specifically, the present invention provides a kind of clean type anti-blue light spectacle lens, there is metha crylic substrate 1, described It includes the first hard conating 2 successively from inside to outside that vapor deposition, which has film layer, front principal plane film layer, on the front principal plane and back interarea of substrate 1, the One anti-scratch wearing layer 3, anti-blue light reflective coating 4, the first anti-reflection film layer 5, the first dust-proof film layer 6, the first cleaning film layer 7 are rear main Face includes the second hard conating 12, the second anti-scratch wearing layer 13, the second anti-reflection film layer 14, green light antireflective coating successively from inside to outside 15, the second dust-proof film layer 16, the second cleaning film layer 17, which is characterized in that the first cleaning film layer 7 and second cleans film layer 17 By ethoxy nonafluorobutane and perfluoro butyl ethyl propyl ether according to 4:1 proportioning is formulated.
As above-mentioned clean type anti-blue light spectacle lens add a small amount of fluorine element surface conditioning agent when preparing the cleaning film layer.
According to the present invention, the anti-blue light reflective coating 4 is set for harmful blue light, the first anti-reflection film layer 5 and Two anti-reflection film layers 14 are set for the beneficial blue light of 465nm to 495nm ranges, and green light antireflective coating 15 be then specific to it is green Light and set, in this way, considerably increase light transmittance, the light transmittance lost when making up anti-harmful blue light.
According to the present invention, at least one of two interareas further comprise an interference-type optical filter 8.Preferably, should Interference-type optical filter is formed on the first anti-scratch wearing layer 3 of the front principal plane of the substrate of the spectacle lens.The interference-type optical filter With the refractive index with 0.2 unit of substrate refractive index, overcome since film layer and a small amount of air in substrate layer bonding place cause Interference fringe and glare problem.The interference-type optical filter can also be deposited directly in the front surface of substrate, why excellent Choosing is deposited on the first anti-scratch wearing layer 3, is also based partially on and considers that the optical filter and the anti-blue light reflective coating 4 are prevented being harmful to together Blue light, effect can more significantly.
According to the present invention, which includes at least one high refractive index layer and at least one low-index layer. Preferably, which is 7 layers of structure, and high refractive index layer and low-index layer can not also be replaced with alternative stacked Formula lamination.In the present invention, the high refractive index refers to high refractive index in 1.70, and low-refraction refers to that refractive index is less than 1.47, the height of refractive index is on the basis of being directed to the refractive index of 550nm wavelength under room temperature.
According to the present invention, the material such as zirconium oxide (ZrO2) of the high refractive index layer use, titanium oxide (TiO2), oxidation Aluminium (Al2O3), tantalum pentoxide (Ta2O5) etc., the material such as silica (SiO2) or titanium dioxide that low-index layer uses Silicon and alumina mixture etc..The outer layer of interference-type optical filter is typically low-index layer, it is preferred to use silica (SiO2) As outer layer.
According to the present invention, at least one layer of conductive layer is had also combined in the interference-type optical filter outer layer, is used for release electrostatic.It should Conductive is made of tin indium oxide (ITO).
According to the present invention, it is not only able to effective anti-harmful blue light, protects wearer's eyes, and visual contrast can also be improved Degree protects the light of eyesight to increase transmission green etc., or even also has dust-proof function.
Description of the drawings:
Fig. 1 is the schematic diagram for the clean type anti-blue light spectacle lens for showing the embodiment of the invention.
Specific implementation mode
The present invention is described in detail by specific embodiment with reference to the accompanying drawings.
As shown in Figure 1, a kind of clean type anti-blue light spectacle lens provided by the invention are shown in the figure, there is metering system Acid system substrate 1, vapor deposition has film layer, front principal plane film layer to wrap successively from inside to outside on the front principal plane of the substrate 1 and back interarea Include the first hard conating 2, the first anti-scratch wearing layer 3, anti-blue light reflective coating 4, the first anti-reflection film layer 5, the first dust-proof film layer 6, One cleaning film layer 7, back interarea include the second hard conating 12, the second anti-scratch wearing layer 13, the second anti-reflection film layer successively from inside to outside 14, green light antireflective coating 15, the second dust-proof film layer 16, the second cleaning film layer 17, the first cleaning film layer 7 and the second clean film Layer 17 is by ethoxy nonafluorobutane and perfluoro butyl ethyl propyl ether according to 4:1 proportioning (molar ratio) is formulated.
When preparing the cleaning film layer, a small amount of fluorine element surface conditioning agent is added.
According to the present invention, the film layer can take kinds of processes to be made, such as sputtering method, coating machine spin-coating method, vacuum Vapour deposition method, chemical medicinal liquid infusion method etc., it is preferred that the present invention uses vacuum vapour deposition.These methods are all known methods, The preparation that these already known processes complete the film of each section may be used.
Material system the present inventor used by cleaning film layer as one of inventive point of the present invention tries by tens thousand of kinds of materials The material that institute's rice steamer is selected is tested, in fact, this two material has remarkable application in terms of preventing retinal detachment, is used as mirror The cleaning film layer of piece also functions to certain health-care effect other than it can clean to eyes, but it may be noted that when, this two To human body, there are inhalation injuries in its natural state for material, belong to volatile material, and protection is needed to pay attention to when preparing.Separately Outside, by ethoxy nonafluorobutane and perfluoro butyl ethyl propyl ether according to 4:1 proportions are done based on clean effect Proportioning, it has been found that according to this proportioning or close to the proportioning, it is almost all effective to most of pollutants.In addition, matching In liquid, it can be suitably added a little fluorine element surface conditioning agent, also can effectively enhance anti-fouling effect.
In the present invention, the anti-blue light reflective coating for 380nm to 465nm visible light wavelengths there is significant decaying to make With Manufacturing Techniques are highly developed, and reflectance spectrum can also be completed by professional software, in the present invention, using true Empty vapour deposition method makes the film layer.
In the present invention, the anti-blue light reflective coating 4 is set for harmful blue light, the first anti-reflection film layer 5 and second Anti-reflection film layer 14 is set for the beneficial blue light of 465nm to 495nm ranges, and green light antireflective coating 15 is then specific to green light And set, eyeglass front principal plane is on the one hand reduced to the reflex beneficial to blue light, on the other hand increases the transmission effect of green light, it is double-deck It acts on simultaneously, can significantly improve visual contrast, light is allowed to seem softer.But, transmission is incident on retina It can be distorted in light coloration, but compared to protection harmful blue light radiation, this point distortion or acceptable.
According to the present invention, at least one of two interareas include an interference-type optical filter 8.Preferably, the interference-type Optical filter is formed on the first anti-scratch wearing layer 3 of the front principal plane of the substrate of the spectacle lens.The interference-type optical filter have with The refractive index of 0.2 unit of substrate refractive index is overcome and is interfered caused by film layer and a small amount of air in substrate layer bonding place Striped and glare problem.The interference-type optical filter can also be deposited directly in the front surface of substrate, why preferred deposition In the first anti-scratch wearing layer 3, also it is based partially on and considers the optical filter 8 and the anti-blue light reflective coating 4 anti-harmful blue light together, Effect can more significantly.
According to the present invention, which includes at least one high refractive index layer and at least one low-index layer. Preferably, which is 7 layers of structure, and high refractive index layer and low-index layer can not also be replaced with alternative stacked Formula lamination.In the present invention, the high refractive index refers to high refractive index in 1.70, and low-refraction refers to that refractive index is less than 1.47, they all refer to the refractive index that 550nm wavelength is directed under room temperature.
According to the present invention, the material such as zirconium oxide (ZrO2) of the high refractive index layer use, titanium oxide (TiO2), oxidation Aluminium (Al2O3), tantalum pentoxide (Ta2O5) etc., the material such as silica (SiO2) or titanium dioxide that low-index layer uses Silicon and alumina mixture etc..The outer layer of interference-type optical filter is typically low-index layer, it is preferred to use silica (SiO2) As outer layer.
According to the present invention, at least one layer of conductive layer is had also combined in the interference-type optical filter outer layer, is used for release electrostatic.It should Conductive is made of tin indium oxide (ITO).
According to the present invention, it is not only able to effective anti-harmful blue light, protects wearer's eyes, and visual contrast can also be improved Degree protects the light of eyesight to increase transmission green etc., or even also has dust-proof function.
The present invention is described in detail above by specific implementation mode, but it should be recognized that the present invention and unlimited In the specific embodiment, the present invention can carry out various modifications and change on this basis.It is all do not depart from the present invention spirit and The equivalents such as any modification, should all be included in the protection scope of the present invention made by principle.

Claims (6)

1. a kind of clean type anti-blue light spectacle lens have metha crylic substrate, in the front principal plane and back interarea of the substrate On vapor deposition have a film layer, front principal plane film layer includes the first hard conating, the first anti-scratch wearing layer, anti-blue light reflection successively from inside to outside Film layer, the first anti-reflection film layer, the first dust-proof film layer, the first cleaning film layer, back interarea include the second hard conating successively from inside to outside, Second anti-scratch wearing layer, the second anti-reflection film layer, green light antireflective coating, the second dust-proof film layer, the second cleaning film layer, feature exist In the first cleaning film layer and second cleans film layer by ethoxy nonafluorobutane and perfluoro butyl ethyl propyl ether according to 4:1 Proportioning be formulated, wherein the proportioning be molar ratio.
2. clean type anti-blue light spectacle lens as described in claim 1, which is characterized in that when preparing the cleaning film layer, addition A small amount of fluorine element surface conditioning agent.
3. clean type anti-blue light spectacle lens as described in claim 1, which is characterized in that in the front principal plane and back interarea of the substrate At least one of an interference-type optical filter is set on interarea.
4. clean type anti-blue light spectacle lens as claimed in claim 3, which is characterized in that the interference-type optical filter is formed in the eye On first anti-scratch wearing layer of the front principal plane of the substrate of eyeglass.
5. clean type anti-blue light spectacle lens as claimed in claim 3, which is characterized in that the interference-type optical filter includes at least one High refractive index layer and at least one low-index layer.
6. clean type anti-blue light spectacle lens as claimed in claim 5, which is characterized in that the interference-type optical filter is 7 layers of structure.
CN201610104862.8A 2016-02-25 2016-02-25 A kind of clean type anti-blue light spectacle lens Active CN105629509B (en)

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FR3054682B1 (en) 2016-07-26 2019-06-21 Bnl Eurolens OPHTHALMIC LENS, PARTICULARLY FOR SUNGLASSES
CN106526891A (en) * 2016-10-31 2017-03-22 天津肯特电子有限公司 Manufacturing method of blue-light-preventing lens, blue-light-preventing lens, blue-light-preventing glasses and electronic device
CN108732784A (en) * 2018-05-24 2018-11-02 李志伟 A kind of eyeglass
CN112162414A (en) * 2020-09-25 2021-01-01 江苏淘镜有限公司 A kind of manufacturing method of special lens for driving
CN112147798A (en) * 2020-09-25 2020-12-29 江苏淘镜有限公司 A progressive lens structure for ultra-clear driving
CN114200553A (en) * 2021-12-23 2022-03-18 江苏同胜光电科技有限公司 Impact-resistant optical lens and production process thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101091944A (en) * 2006-06-22 2007-12-26 精工爱普生株式会社 Spin coating apparatus and coating method of composition for antireflection layer
WO2008041750A1 (en) * 2006-10-05 2008-04-10 Asahi Glass Company, Limited Fluorinated polymer, method of producing the same and water- and oil-repellent composition
CN101679229A (en) * 2007-06-08 2010-03-24 3M创新有限公司 Water- and oil-repellency imparting ester oligomers comprising perfluoroalkyl moieties
CN202583624U (en) * 2012-05-02 2012-12-05 温州绿宝视光科技有限公司 Lens capable of protecting eyes from computers
CN103298611A (en) * 2011-01-13 2013-09-11 中央硝子株式会社 Antifouling article and method for producing same
CN104133300A (en) * 2014-08-06 2014-11-05 瑞安市嘉崎偏光镜片有限公司 Eyeglasses of sunglasses
CN104199129A (en) * 2014-08-29 2014-12-10 南阳格瑞光电有限公司 Waterproof antifouling optical lens and processing technology thereof
CN104423061A (en) * 2013-08-29 2015-03-18 江苏远大光学科技有限公司 Novel eyeglass structure
CN104704420A (en) * 2012-10-11 2015-06-10 埃西勒国际通用光学公司 Photochromic ophthalmic lens
CN204422892U (en) * 2015-01-19 2015-06-24 浙江海洋学院 A kind of blue light absorption type plated film resin lens and anti-blue light glasses

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101091944A (en) * 2006-06-22 2007-12-26 精工爱普生株式会社 Spin coating apparatus and coating method of composition for antireflection layer
WO2008041750A1 (en) * 2006-10-05 2008-04-10 Asahi Glass Company, Limited Fluorinated polymer, method of producing the same and water- and oil-repellent composition
CN101679229A (en) * 2007-06-08 2010-03-24 3M创新有限公司 Water- and oil-repellency imparting ester oligomers comprising perfluoroalkyl moieties
CN103298611A (en) * 2011-01-13 2013-09-11 中央硝子株式会社 Antifouling article and method for producing same
CN202583624U (en) * 2012-05-02 2012-12-05 温州绿宝视光科技有限公司 Lens capable of protecting eyes from computers
CN104704420A (en) * 2012-10-11 2015-06-10 埃西勒国际通用光学公司 Photochromic ophthalmic lens
CN104423061A (en) * 2013-08-29 2015-03-18 江苏远大光学科技有限公司 Novel eyeglass structure
CN104133300A (en) * 2014-08-06 2014-11-05 瑞安市嘉崎偏光镜片有限公司 Eyeglasses of sunglasses
CN104199129A (en) * 2014-08-29 2014-12-10 南阳格瑞光电有限公司 Waterproof antifouling optical lens and processing technology thereof
CN204422892U (en) * 2015-01-19 2015-06-24 浙江海洋学院 A kind of blue light absorption type plated film resin lens and anti-blue light glasses

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