清華大學奈微所教授葉哲良公布，開發完成全球首創的「仿水晶體之液態鏡頭」，此鏡頭從顯微到廣角一鏡到底，像眼睛水晶體曲率對焦一樣，從1公分近到2公尺遠的物體都能清楚對焦，耐摔又節能，未來運用此鏡頭的3C產品和內視鏡等醫療器材年底將上市。
台灣科技研發力又再國際發光，不過為了做出這顆液態眼珠，團隊花了3年時間，才找到符合20種參數要求的水醇混合液與矽油。葉哲良說，「一般透鏡會摔破，液體你丟去撞牆也撞不破啦！」不只可免於碰撞帶來的耗損，這世界首創的介電式液態鏡頭，利用電壓操控液珠，可如同人眼利用睫狀肌調校水晶體曲率變化一樣，達到變焦效果，相較於傳統鏡頭，液態鏡頭的對焦速度快、沒有零件磨損問題，耗能起碼低50倍。
創新又實用的新發明一定價格不斐？葉哲良說，因為合作研發的業者傳授成本控制經驗，材料並不昂貴，未來使用這個液態鏡頭的產品，並不會比原本的產品貴。葉哲良在記者會場展出拍攝指紋的設備，他說，皮膚太乾燥或是沾到一絲東西都可拍得清清楚楚，拍出3D影像和同時拍攝五指都不是問題，而現有拍攝儀器，易因接觸面沾污而不易拍攝的問題，也不再存在。
液態鏡頭畫素目前已做到500萬畫素，預計年底會有使用液態鏡頭的相機、手機及口腔內視鏡上市量產，可望顛覆現有微型攝影市場。此研發成果亦已與國際有所接觸，葉哲良說，除已於2007年8月登上全球發行量第一的光電雜誌《TechnologyWorld》；目前與日本九州大學合作研發超小型行動感測裝置。
原文網址: 「液態鏡頭」摔不壞 顯微、廣角一鏡搞定 | 生活新聞 | NOWnews 今日新聞網 http://www.nownews.com/2010/06/03/327-2610671.htm#ixzz1FXX6KJuZ
台灣科技研發力又再國際發光，不過為了做出這顆液態眼珠，團隊花了3年時間，才找到符合20種參數要求的水醇混合液與矽油。葉哲良說，「一般透鏡會摔破，液體你丟去撞牆也撞不破啦！」不只可免於碰撞帶來的耗損，這世界首創的介電式液態鏡頭，利用電壓操控液珠，可如同人眼利用睫狀肌調校水晶體曲率變化一樣，達到變焦效果，相較於傳統鏡頭，液態鏡頭的對焦速度快、沒有零件磨損問題，耗能起碼低50倍。
創新又實用的新發明一定價格不斐？葉哲良說，因為合作研發的業者傳授成本控制經驗，材料並不昂貴，未來使用這個液態鏡頭的產品，並不會比原本的產品貴。葉哲良在記者會場展出拍攝指紋的設備，他說，皮膚太乾燥或是沾到一絲東西都可拍得清清楚楚，拍出3D影像和同時拍攝五指都不是問題，而現有拍攝儀器，易因接觸面沾污而不易拍攝的問題，也不再存在。
液態鏡頭畫素目前已做到500萬畫素，預計年底會有使用液態鏡頭的相機、手機及口腔內視鏡上市量產，可望顛覆現有微型攝影市場。此研發成果亦已與國際有所接觸，葉哲良說，除已於2007年8月登上全球發行量第一的光電雜誌《TechnologyWorld》；目前與日本九州大學合作研發超小型行動感測裝置。
原文網址: 「液態鏡頭」摔不壞 顯微、廣角一鏡搞定 | 生活新聞 | NOWnews 今日新聞網 http://www.nownews.com/2010/06/03/327-2610671.htm#ixzz1FXX6KJuZ
耐摔液態鏡頭 顯微廣角一鏡到底
國科會成功研發出仿人眼水晶體的液態鏡頭，從顯微到廣角一鏡到底，耐摔又節能，不僅可應用於手機照相等行動載體，未來內視鏡、口腔鏡等醫療器材也用得上。
液態鏡頭畫素目前已做到五百萬畫素，預計年底量產，價格應不會高於現有機械式，可望顛覆現有微型攝影市場，創新潮流。
人類的眼睛好比是相機的透鏡，調整水晶體的屈光度可讓眼睛將不同距離的物體清楚成像，清華大學奈微所所長葉哲良團隊師法自然，研發出世界首創的不導電液態鏡頭，利用兩種相同密度的液體，以電壓操控液珠，如同人眼利用睫狀肌調校水晶體曲率變化，而達到變焦效果。
葉哲良指出，液態鏡頭與傳統相機鏡頭的對焦方式完全不同，傳統是利用兩個鏡片改變透鏡間距，液態鏡頭則利用曲面對焦；新型鏡頭消耗的功率也比傳統式的少了五十倍以上，且傳統鏡頭摔了會破，但新型鏡頭因為是液體因此不怕摔。
蚊子翅膀 距一公分就能近拍
葉哲良表示，一顆指尖大小的液態鏡頭，可同時擁有三十倍顯微鏡的近拍功能，以及萬元級數位相機的廣角功能；換句話說，原本拿著手機拍攝至少需要距離十幾、二十公分才能拍清楚的影像，用新型鏡頭只要距離一公分就很清晰，連蚊子翅膀的紋路都很清楚。
國科會工程處處長蔡其杭表示，不導電液態鏡頭可以近距離拍攝極清晰影像的特性，不僅可運用在行動裝置的攝影鏡頭上，未來更可應用在監視器、指紋安全等，尤其看好其對於生醫器材的應用，如內視鏡與口腔鏡等。
PhilipsÂ’ Fluid Lenses
Philips Research at the CeBIT exhibition is demonstrating a unique variable-focus lens system that has no mechanical moving parts. Suited to a wide range of optical imaging applications, including digital cameras. Philips’ FluidFocus system mimics the action of the human eye using a fluid lens that alters its focal length by changing its shape. The new lens, which lends itself to high volume manufacturing, overcomes the fixed-focus disadvantages of many of today’s low-cost imaging systems.
Press Release:
Philips’ Fluid Lenses Bring Things into Focus
At this year’s CeBIT Exhibition in Hannover Germany, Philips Research is demonstrating a unique variable-focus lens system that has no mechanical moving parts. Suited to a wide range of optical imaging applications, including such things as digital cameras, camera phones, endoscopes, home security systems and optical storage drives, Philips’ FluidFocus system mimics the action of the human eye using a fluid lens that alters its focal length by changing its shape. The new lens, which lends itself to high volume manufacturing, overcomes the fixed-focus disadvantages of many of today’s low-cost imaging systems.
The Philips FluidFocus lens consists of two immiscible (non-mixing) fluids of different refractive index (optical properties), one an electrically conducting aqueous solution and the other an electrically non-conducting oil, contained in a short tube with transparent end caps. The internal surfaces of the tube wall and one of its end caps are coated with a hydrophobic (water-repellent) coating that causes the aqueous solution to form itself into a hemispherical mass at the opposite end of the tube, where it acts as a spherically curved lens.
The shape of the lens is adjusted by applying an electric field across the hydrophobic coating such that it becomes less hydrophobic – a process called ‘electrowetting’ that results from an electrically induced change in surface-tension. As a result of this change in surface-tension the aqueous solution begins to wet the sidewalls of the tube, altering the radius of curvature of the meniscus between the two fluids and hence the focal length of the lens. By increasing the applied electric field the surface of the initially convex lens can be made completely flat (no lens effect) or even concave. As a result it is possible to implement lenses that transition smoothly from being convergent to divergent and back again.
In the FluidFocus technology demonstrator being exhibited by Philips Research at CeBIT 2004, the fluid lens measures a mere 3 mm in diameter by 2.2 mm in length, making it easy to incorporate into miniature optical pathways. The focal range provided by the demonstrator extends from 5 cm to infinity and it is extremely fast: switching over the full focal range is obtained in less than 10 ms. Controlled by a dc voltage and presenting a capacitive load, the lens consumes virtually zero power, which for battery powered portable applications gives it a real advantage. The durability of the lens is also very high, Philips having already tested the lens with over 1 million focusing operations without loss of optical performance. It also has the potential to be both shock resistant and capable of operating over a wide temperature range, suiting it for mobile applications. Its construction is regarded as compatible with high-volume manufacturing techniques.
(A) Schematic cross section of the FluidFocus lens principle. (B) When a voltage is applied, charges accumulate in the glass wall electrode and opposite charges collect near the solid/liquid interface in the conducting liquid. The resulting electrostatic force lowers the solid/liquid interfacial tension and with that the contact angle q and hence the focal distance of the lens. (C) to (E) Shapes of a 6-mm diameter lens taken at different applied voltages.
Prototype FluidFocus lenses
Photos courtesy of Philips
人類的眼睛好比是相機的透鏡，調整水晶體的屈光度可讓眼睛將不同距離的物體清楚成像，清華大學奈微所所長葉哲良團隊師法自然，研發出世界首創的不導電液態鏡頭，利用兩種相同密度的液體，以電壓操控液珠，如同人眼利用睫狀肌調校水晶體曲率變化，而達到變焦效果。
葉哲良指出，液態鏡頭與傳統相機鏡頭的對焦方式完全不同，傳統是利用兩個鏡片改變透鏡間距，液態鏡頭則利用曲面對焦；新型鏡頭消耗的功率也比傳統式的少了五十倍以上，且傳統鏡頭摔了會破，但新型鏡頭因為是液體因此不怕摔。
蚊子翅膀 距一公分就能近拍
葉哲良表示，一顆指尖大小的液態鏡頭，可同時擁有三十倍顯微鏡的近拍功能，以及萬元級數位相機的廣角功能；換句話說，原本拿著手機拍攝至少需要距離十幾、二十公分才能拍清楚的影像，用新型鏡頭只要距離一公分就很清晰，連蚊子翅膀的紋路都很清楚。
國科會工程處處長蔡其杭表示，不導電液態鏡頭可以近距離拍攝極清晰影像的特性，不僅可運用在行動裝置的攝影鏡頭上，未來更可應用在監視器、指紋安全等，尤其看好其對於生醫器材的應用，如內視鏡與口腔鏡等。
PhilipsÂ’ Fluid Lenses
Philips Research at the CeBIT exhibition is demonstrating a unique variable-focus lens system that has no mechanical moving parts. Suited to a wide range of optical imaging applications, including digital cameras. Philips’ FluidFocus system mimics the action of the human eye using a fluid lens that alters its focal length by changing its shape. The new lens, which lends itself to high volume manufacturing, overcomes the fixed-focus disadvantages of many of today’s low-cost imaging systems.
Press Release:
Philips’ Fluid Lenses Bring Things into Focus
At this year’s CeBIT Exhibition in Hannover Germany, Philips Research is demonstrating a unique variable-focus lens system that has no mechanical moving parts. Suited to a wide range of optical imaging applications, including such things as digital cameras, camera phones, endoscopes, home security systems and optical storage drives, Philips’ FluidFocus system mimics the action of the human eye using a fluid lens that alters its focal length by changing its shape. The new lens, which lends itself to high volume manufacturing, overcomes the fixed-focus disadvantages of many of today’s low-cost imaging systems.
The Philips FluidFocus lens consists of two immiscible (non-mixing) fluids of different refractive index (optical properties), one an electrically conducting aqueous solution and the other an electrically non-conducting oil, contained in a short tube with transparent end caps. The internal surfaces of the tube wall and one of its end caps are coated with a hydrophobic (water-repellent) coating that causes the aqueous solution to form itself into a hemispherical mass at the opposite end of the tube, where it acts as a spherically curved lens.
The shape of the lens is adjusted by applying an electric field across the hydrophobic coating such that it becomes less hydrophobic – a process called ‘electrowetting’ that results from an electrically induced change in surface-tension. As a result of this change in surface-tension the aqueous solution begins to wet the sidewalls of the tube, altering the radius of curvature of the meniscus between the two fluids and hence the focal length of the lens. By increasing the applied electric field the surface of the initially convex lens can be made completely flat (no lens effect) or even concave. As a result it is possible to implement lenses that transition smoothly from being convergent to divergent and back again.
In the FluidFocus technology demonstrator being exhibited by Philips Research at CeBIT 2004, the fluid lens measures a mere 3 mm in diameter by 2.2 mm in length, making it easy to incorporate into miniature optical pathways. The focal range provided by the demonstrator extends from 5 cm to infinity and it is extremely fast: switching over the full focal range is obtained in less than 10 ms. Controlled by a dc voltage and presenting a capacitive load, the lens consumes virtually zero power, which for battery powered portable applications gives it a real advantage. The durability of the lens is also very high, Philips having already tested the lens with over 1 million focusing operations without loss of optical performance. It also has the potential to be both shock resistant and capable of operating over a wide temperature range, suiting it for mobile applications. Its construction is regarded as compatible with high-volume manufacturing techniques.
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(A) Schematic cross section of the FluidFocus lens principle. (B) When a voltage is applied, charges accumulate in the glass wall electrode and opposite charges collect near the solid/liquid interface in the conducting liquid. The resulting electrostatic force lowers the solid/liquid interfacial tension and with that the contact angle q and hence the focal distance of the lens. (C) to (E) Shapes of a 6-mm diameter lens taken at different applied voltages.
Prototype FluidFocus lenses
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Photos courtesy of Philips
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