TW219392B - Multifocal ophthalmic lens - Google Patents
Multifocal ophthalmic lens Download PDFInfo
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- TW219392B TW219392B TW082105697A TW82105697A TW219392B TW 219392 B TW219392 B TW 219392B TW 082105697 A TW082105697 A TW 082105697A TW 82105697 A TW82105697 A TW 82105697A TW 219392 B TW219392 B TW 219392B
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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
- G02C7/12—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
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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
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/041—Contact lenses for the eyes bifocal; multifocal
- G02C7/042—Simultaneous type
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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
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/041—Contact lenses for the eyes bifocal; multifocal
- G02C7/044—Annular configuration, e.g. pupil tuned
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/20—Diffractive and Fresnel lenses or lens portions
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- Ophthalmology & Optometry (AREA)
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- Optics & Photonics (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
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Description
Α6 Β6 219S92 五、發明説明(/) 薛明背# 本發明傜有關於眼睛透鏡的設計改菩,更特別的是該 透鏡可具有雙焦距視力。 伴隨箸年齡老化,視力上會有老花眼的缺點。老花眼 患者缺乏梘力調節的能力,所謂視力調節的能力是指不靠 校正透鏡的幫肋,眼睛有調整近距離或中距離目標使之看 得清楚的能力。 一般老花眼的校正係採用雙焦距鏡H,其具有可看遠 距離的上半部,更一般而言係用來校正近視或遠視,及具 有可看近距離之屈光度的下半部。然而上述鏡Μ無法很容 易地應用至隱形眼鏡上,因為S形眼鏡很容易隨眼球移動 並分散視力。為了克服這個問題.使用之雙焦距透鏡必需 在下半部具較厚的邊緣,以便使佩戴者向下看時可啣接住 下眼皮,但此又會造成透鏡由瞳孔向上滑至角膜的缺點。 這樣一來,會隨眼睛滑動的透鏡很難被設計成符合下眼皮 的尺寸,亦即,透鏡的移動量也必需被小心測量以符合雙 焦距之間的高度。 有一些解決方法對雙焦距透鏡以避免上述設計之缺點 。其中之一是提供多重焦距之繞射透鏡,其偽由一糸列之 同心、相處理之輪環所組成。該環提供同時的焦距倍率, 可使近距及遠距視覺有證敏的轉換。另外的方法是提供多 重焦距之眼睛透鏡,其偽由多數同心圆組成,該環在每一 區域内及區域間的轉換均具有連續變化的倍率。上述區域 本紙張又度適用中围园家疗準(CNS)甲4規Λ1· (210 X 297公坌) ------------------------裝------.玎------線 (請先閲讀背面之注意事項再填寫本頁) 經濟部中夹標準局R工消费合作社印« 82·('). 40,000 經濟部中央標準局員工消費合作社印¾ ^19392 A6 B6 五、發明説明( 可藉由連續改變透鏡背面曲度,或藉由一沿透鏡徑向有連 續改變折射率的非均勻表面而達成。 但上述同心環形狀的透鏡存在的問題是,因閉合而在 角膜形成封合區域。角膜中心是人類視力上重要的構件。 在角膜中心適當的淚流量對角膜健康是重要的。腺形眼鏡 ,特別是那些親水性適合角膜穿戴者。透鏡閉合同心環的 背面輪廓會阻隔中心角膜的淚膜而形成閉合琛形狀的溝槽 。自然眼淚只侷限在小區域内循環,不易使角膜得到濕潤 。若增加透鏡之碎片沉積及角膜刻紋模式很可能可解決上 述問題。 欲消除同心環之多重焦距透鏡之固有問題,更持別的 是能夠提供Φ心角膜適當的淚流量。 發明槪酉 本發明傜提供一種多重焦距,例如雙焦距之眼睛透鏡 ,該透鏡至少在其中一表面,具有能提供多數不同屈光倍 率之包含單一條紋的擬螺旋模態。不同屈光倍率可藉由選 擇一具有選擇交替性之眼睛入射光角度的截面條紋輪廓而 達成。例如,該條紋可提供一連鑲漸進的倍率範圍,或提 供獨立倍率的不連續組合。選擇性地,螺旋模態也可藉由 印刷至透鏡表面以.達成折射率之變化輪廊。然而,無論如 何,螺旋模態保証在中心角膜區域有適當的淚流量。 因此本發明的目的在於提供一雙焦距透鏡,其有賴於 達到處理所欲倍率之視覺相,且無閉合同心環固有的生理 本纸張义度適用中同同家桴屯(CNS)甲4規格(210 X 297公兮〉 82.6. 40,000 -------------------------裝------訂------線 (請先閲讀背面之注意事項再填寫本頁) 219392 經濟部中央標準局貝工消費合作社印製 A6 B6 五、發明説明(j) 缺點。 圖示簡略説昍 圔1偽關於先前技藝中閉合同心環之眼鏡的正視圖。 圖2係根據本發明之眼睛透鏡的前視圖。 圖3係根據本發明可用來使用在透鏡上的螺旋模態。 圖4係圔3之4-4線之條纹斷面的截面圖,圖3係根據本發 明可用來使用在透鏡±的螺旋模態。 圖5偽根據本發明之眼睛透鏡的前視圖,其螺旋模態由墨水 组成。 圔6係根據本發明之眼睛透鏡的前視圖,其螺旋模態藉由透 鏡材料之選擇性極化而達成。 較住亘餺甯掄例註細說B日 如上逑之圔1 係圖解先前技g所述之眼睛透鏡2,其 具有多數密合同心環4及局部區域6 。 本發明之透鏡,··可以裝佩在眼睛表面上或可耐久地保留 在眼睛内。圖2 偽根據本發明說明的多重焦距隱形眼鏡1 0 。圔式的尺寸並不企圖符合刻度。透鏡10具有球形前凸表 面1 2和後凹表面14。透鏡1 〇之中間區域具有非球形視覺 區域1 6 ,其周圍有環形調和部份1 8。 透鏡10,至少在表面12或14之一具有可提供多數不同 屈光倍率之包含單一磔紋 20之擬螺旋模態。在圖2的範 例中,筷紋2 0是在後表面丨4上。條紋2 0始於靠近透鏡1 0 邊錄的第一邊端2 2且螺旋向内,其為一單獨線路,向著透 -裝------ir------線 (請先閲讀背面之注意^項存填寫本頁) 本纸張又度通用中國國家標準(CNS)甲4蜆格(210 X 297公这) 82.6. 40,000 219392 A6 B6 五、發明説明( 經濟部中央樣準局員工消費合作社印製 鏡 1C 1之中心區域盤旋,並終止於第二邊端24。 舉 例來詋, 多重焦距隱形 眼錢1 0可 包 含的螺條紋 20 之 模 態 必須符合 下列方程式: T(X, Y) = STEP(S) 其 中 STEP ( S )是階梯函數 ,當 S迄 0 其值為1 ,當 S < 0 其值為 0 ,且 Τ = 1 表示光穿透 率 100% . T = :0 表 示 光 穿透率0 :其中S可 由下列方程 計 算而得, S ( X, y) =s i η [ η • Ρ/2 λ .(χζ + y2 ) + k. a r c t a n (x/y)· ) 其 中 P 為所欲之增加倍率(即兩値不同焦距的倍率; 差值 ) • λ 為 聞係波長 .k 為螺旋形狀的控制參數,x,y丨 為透 鏡 上 的 笛 卡兒座標 ,其傜以透鏡 中心為原點 > /3為控制 參數 的 起 始 相態。 一 根據上述 方程式而定的 持殊螺旋條 紋 2 0被說明如 圖 3 1 其中 P = 1 . 5屈光度, λ = 5 5 5 η π , k = -1及冷 = 0〇 為了方'便說明.如圔 3之a3, b3, d3 ,e3等四値 位 置 之 座 標列在表 1 。 c3表示模態之第二邊端24 c ,該 透 鏡 具 有 三鳐焦距 ,其增加倍率 為 1 . 5個屈光度。 表1 位 置 X座標 _ y座標 子午線 白 中心之徑 向距離 a3 0.00000 1.36015 90 ° 1 .36015 b3 -1.48997 0.00000 180° 1 .48997 d3 0.00000 -1.60935 2 7 0。 1 .60935 e 3 1.72047 0.00000 3 6 0 ° I .72047 {請先閲讀背面之注意事項再堆寫本頁) 本纸張尺度適用中國國家疗準(CNS)甲4規格(210 X 297公梦) 82.6. 40,000 經濟部中兴標準马負工消费合作社印製 319392 A6 _B6_ 五、發明説明(f) 如圔3顯示之設計上的變化,可能藉由T = 1區域及 Τ= 〇區或之光程差而達成,卽光在Τ = 0區域穿射量恢 復至100%。光程差(OPD)定義如下: OPD= (0.5 + η) ♦ λ 其中π為任意整數。 據瞭解光程差可由數個方式被達成。舉列而言,所設 計之透鏡所具備的倍率.镞由選自具有能夠選擇交替性之 眼睛入射光角度之折射光柵的條紋20所達成。亦即,條纹 20具備有可預先決定所加諸入射光波振幅強度或相或其兩 者之週期性變化的橫截面輪廓。條紋20也可使用如圖4 之 «曲曲線之横截面輪廓,或在條紋 20内有變化之折射率 。上述概念披詳細討論於 Βογπι,Μ. 和 Wolf.E. .Principles of Optics , pp401-423 1 st EditionCPergamon Press 1959)、Portney 之美國專利第 4,898,461號及 Cohen之美國專利第 4,898 ,461號,上 述文獻在此均併入參考。 也可能藉由修正可見光區(約400 ηπ至700 ηιπ )之 穿透光譜而達校正光程差的目的。在該例中,T=1 區域可 能只被當作可通過光譜的第一範圍(例如,紅-黃區域) ,而τ = ο區域則被當作可通過光譜之不同於第一範圍的第 二範圍(例如,綠-藍區域)。實際上,於圖5顯示,螺 旋條紋2 0 可以使用一種墨水,特別是具有綠-藍陰影的一 種墨水.印刷至透鏡表面上。條紋2 0 之間之空隙2 6最好 (請先閲讀背面之注意事項再填寫本頁) 本纸张又茂適用中國國家痄準(CNTS)甲4规丨Μ210 X 297公分) 82.6. 40,000 219392 A6 B6 五、發明説明(& ) 是透明的。 如圖6 顯示,另外一種可能逹成校正光程差之方法是 莛擇修正透鏡材料的極化程度。在該例中,T=1 區域可能 是使光極化至某一値方向,而T = 0 區域則是將光極化至另 一痼方向(最好是垂直於T=1區域之極化方向 例如T=1區域26可能極化成 180°而 T = 0極化成9(Τ 。 雖然本發明以上述特定實施例描述,但所顯示的内容 很容易在不遠離本發明的精神情況下•被熟於此技藝人士 所企圖修飾或變更。 (請先閲讀背面之注意事項再項寫本頁) 經濟部中央標準局貝工消費合作社印製 本紙張ΛΛϋ用中园国家料(CNS) 4规格(21β Χ 297公楚) 82.6. 40,000
Claims (1)
- A7 B7 C7 D7 «濟部t央樣率局te工消費合作社印纪 六、申請專利範圍 1. 一多重焦距之眼睛透鏡,其在覆蓋配戴者角膜區域的表 面上具有擬螺旋模態,所謂擬螺旋模態可提供多數$同 的屈光倍率。 2. 如申.請專利範圍第1項多重焦距之眼睛透鏡,其中所稱 的擬螺旋模態必須符合下列方程式·· T(X,Y)=STEP(S) 其中STEP(S)是階梯函數.當S 2 0其值為1 ,當 s<0其值為0,且T = 1表示光穿透率100% , τ = ο表示光穿透率0;其中S可由下列方程計算而 得. S(x,y) = sin [π ·Ρ/2λ .(χε ”2 )+k.arctan (x/y) + /3 ] 其中P為所欲之增加倍率(即兩値不同焦距的倍率差 值),λ為關係波長,k為螺旋形狀的控制參數, X , y為透鏡上的笛卡兒座標,其係以透鏡中心為原點, /3為控制參數的起始相態。 3. 如申請專利範圍第1項多重焦距之眼睛透鏡,其中擬螺 旋模態傜包含一可改變入射光角度之形成折射光柵的條 4. 如申請專利範圍第3項多重焦距之眼睛透鏡,其中條紋 具有鼙曲曲線之橫截面輪廓。 5. 如申請專利範圍第3項多重焦距之眼睛透鏡,其中筷紋 可用來修正可見光區之穿透光譜。 6. 如申請專利範圍第5項多重焦距之眼睛透鏡,其中條紋 ----------------:-------裝------.ΤΓ----- (請先閲讀背面之注意事項再填寫本頁) 本紙认尺Λ遇用中S國家標準(CNS>甲4规格(210 X 297公货) A7 熳濟部中喪標準局ΑΚ工消費合作社印Ϊ B7 C7 ____D7_ 六、申請專利範園 以墨水組成而被提供在透鏡表面上,所稱尋水能夠修正 可見光區之穿透光譜。 7. 如申請專利範圍第5項多重焦距之眼睛透鏡,其中條纹 以墨水組成而被提供在透鏡表面上,且條紋之間之空隙 是透明的。 8. 如申請專利範圍第5項多重焦距之眼睛透鏡,其中條紋 偽由可形成穿透第一光譜範圍的第一墨水所组成,且在 條紋之間的空彳隙還包含有可形成穿透第二光譜範圍之第 二墨水,其中第二光譜範圍不同於第一光譜範圍。 9. 如申諝專利範圍第δ項多重焦距之眼睛透鏡,其中光穿 透之墨水屬红-黃區域。 10. 如申請專利範圍第8項多重焦距之眼睛透鏡,其中光穿 透之第一墨水屬紅-黃區域。 11. 如申請專利範圍第10項多重焦距之眼睛透鏡,其中光穿 透之第二墨水屬綠-藍區域。 12. 如申請專利範圍第5項多重焦距之眼睛透鏡,其中條紋 傜由透鏡材料之選擇性極化區域所組成。 13. 如申請專利範圍第5項多重焦距之眼睛透鏡,其中筷紋 傺由具有不同折射率的透鏡材料之選擇性極化區域.所組 成。 14. 如申請專利範圍第1項多重焦距之眼睛透鏡,其中透鏡 適合被放在眼睛表面。 1 5 .如申請專利範圍第1項多重焦距之眼睛透鏡,其中透鏡 (請先閲讀背面之注意事項再填寫本頁) —裝· 訂 本纸朵尺茂適用中因因家標準(CNS)甲4規恪(210 X 297公货) 219392 A7 B7 C7 D7 六、申請專利範圍 内 睛 眼 在 留 保 地 久 持 被 合 適 (請先閱讀背面之注意事項再瑣寫本頁) 烴濟部中夹櫺準局β工消費合作钍印 本紙认又度通用tgga家標準(CNS)甲4规格(210 X 297公货)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US08/053,122 US5408281A (en) | 1993-04-26 | 1993-04-26 | Multifocal contact lens |
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TW219392B true TW219392B (en) | 1994-01-21 |
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TW082105697A TW219392B (en) | 1993-04-26 | 1993-07-17 | Multifocal ophthalmic lens |
Country Status (17)
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US (1) | US5408281A (zh) |
EP (1) | EP0622653B1 (zh) |
JP (1) | JPH06324292A (zh) |
AT (1) | ATE160885T1 (zh) |
AU (1) | AU682337B2 (zh) |
CA (1) | CA2121973A1 (zh) |
DE (1) | DE69407087T2 (zh) |
DK (1) | DK0622653T3 (zh) |
ES (1) | ES2109645T3 (zh) |
FI (1) | FI941888A (zh) |
GR (1) | GR3025766T3 (zh) |
HK (1) | HK1002540A1 (zh) |
IL (2) | IL109375A0 (zh) |
NO (1) | NO307277B1 (zh) |
NZ (1) | NZ260378A (zh) |
TW (1) | TW219392B (zh) |
ZA (1) | ZA942807B (zh) |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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- 1993-04-26 IL IL10937593A patent/IL109375A0/xx unknown
- 1993-07-17 TW TW082105697A patent/TW219392B/zh active
-
1994
- 1994-04-18 AT AT94810217T patent/ATE160885T1/de active
- 1994-04-18 DE DE69407087T patent/DE69407087T2/de not_active Expired - Fee Related
- 1994-04-18 EP EP94810217A patent/EP0622653B1/en not_active Expired - Lifetime
- 1994-04-18 DK DK94810217T patent/DK0622653T3/da active
- 1994-04-18 ES ES94810217T patent/ES2109645T3/es not_active Expired - Lifetime
- 1994-04-19 JP JP6080378A patent/JPH06324292A/ja active Pending
- 1994-04-21 IL IL109375A patent/IL109375A/en not_active IP Right Cessation
- 1994-04-21 AU AU60640/94A patent/AU682337B2/en not_active Ceased
- 1994-04-22 ZA ZA942807A patent/ZA942807B/xx unknown
- 1994-04-22 FI FI941888A patent/FI941888A/fi unknown
- 1994-04-22 NZ NZ260378A patent/NZ260378A/xx unknown
- 1994-04-22 CA CA002121973A patent/CA2121973A1/en not_active Abandoned
- 1994-04-25 NO NO941501A patent/NO307277B1/no not_active IP Right Cessation
-
1997
- 1997-12-23 GR GR970403417T patent/GR3025766T3/el unknown
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1998
- 1998-02-26 HK HK98101478A patent/HK1002540A1/xx not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106501885A (zh) * | 2017-01-13 | 2017-03-15 | 京东方科技集团股份有限公司 | 透镜及其制造方法、以及光学显示设备 |
CN106501885B (zh) * | 2017-01-13 | 2019-07-05 | 京东方科技集团股份有限公司 | 透镜及其制造方法、以及光学显示设备 |
US10859822B2 (en) | 2017-01-13 | 2020-12-08 | Beijing Boe Optoelectronics Technology Co., Ltd. | Lens, optical display device and manufacturing method for lens |
Also Published As
Publication number | Publication date |
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AU6064094A (en) | 1994-10-27 |
ES2109645T3 (es) | 1998-01-16 |
FI941888A0 (fi) | 1994-04-22 |
DE69407087D1 (de) | 1998-01-15 |
EP0622653B1 (en) | 1997-12-03 |
FI941888A (fi) | 1994-10-27 |
IL109375A0 (en) | 1994-07-31 |
DE69407087T2 (de) | 1998-05-14 |
EP0622653A1 (en) | 1994-11-02 |
NO941501D0 (zh) | 1994-04-25 |
IL109375A (en) | 1998-03-10 |
JPH06324292A (ja) | 1994-11-25 |
NZ260378A (en) | 1997-08-22 |
US5408281A (en) | 1995-04-18 |
DK0622653T3 (da) | 1998-08-10 |
HK1002540A1 (en) | 1998-08-28 |
NO307277B1 (no) | 2000-03-06 |
ZA942807B (en) | 1994-10-27 |
ATE160885T1 (de) | 1997-12-15 |
CA2121973A1 (en) | 1994-10-27 |
AU682337B2 (en) | 1997-10-02 |
GR3025766T3 (en) | 1998-03-31 |
NO941501L (no) | 1994-10-27 |
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