JPWO2013118176A1 - 回折型多焦点眼用レンズとその製造方法 - Google Patents
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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Abstract
レンズ10に対して回折ゾーンが同心円状に複数形成された回折構造20を有する回折型多焦点眼用レンズにおいて、回折ゾーンの少なくとも2つのゾーンの間隔が等しい等間隔領域を設けた。
Description
0.1mm≦Δr≦0.5mm
Claims (22)
- レンズに対して回折ゾーンが同心円状に複数形成された回折構造を有する回折型多焦点眼用レンズにおいて、
前記回折ゾーンの少なくとも2つのゾーンの間隔が等しい等間隔領域を設けたことを特徴とする回折型多焦点眼用レンズ。 - 前記等間隔領域として、隣接して設けられた複数の前記回折ゾーンによって構成された該等間隔領域を備えている請求項1に記載の回折型多焦点眼用レンズ。
- 前記等間隔領域として、隣接しないで設けられた複数の前記回折ゾーンによって構成された該等間隔領域を備えている請求項1又は2に記載の回折型多焦点眼用レンズ。
- 前記等間隔領域が、前記回折ゾーンの間隔を互いに異ならせて複数設けられた請求項1〜3の何れか一項に記載の回折型多焦点眼用レンズ。
- 前記等間隔領域の回折ゾーンの間隔が互いに異なる複数の等間隔領域が設けられた回折構造において、少なくとも二つの等間隔領域が相互に隣接している請求項4に記載の回折型多焦点眼用レンズ。
- 前記等間隔領域の回折ゾーンの間隔が互いに異なる複数の等間隔領域が設けられた回折構造において、少なくとも2つの等間隔領域が互いに隣接せずに設けられている請求項4又は5に記載の回折型多焦点眼用レンズ。
- 前記回折構造が、フレネル間隔の周期構造からなるフレネル領域と、前記等間隔領域とを、有している請求項1〜6の何れか一項に記載の回折型多焦点眼用レンズ。
- 前記フレネル領域が前記回折構造の内周部分に配され、前記等間隔領域がその外周部分に配されている請求項7に記載の回折多焦点眼用レンズ。
- 前記フレネル領域が前記回折構造の外周部分に配され、前記等間隔領域がその内周部分に配されている請求項7に記載の回折多焦点眼用レンズ。
- 前記フレネル領域の間隔が下式によって定められている請求項7〜9の何れか一項に記載の回折多焦点眼用レンズ。
- 前記回折構造が、光の位相を特定する位相関数で表される回折ゾーンからなる請求項1〜10の何れか一項に記載の回折多焦点眼用レンズ。
- 前記回折ゾーンの位相関数がブレーズ状の関数からなる請求項11に記載の回折型多焦点眼用レンズ。
- 前記回折ゾーンのブレーズ状の位相関数が下式で表わされる請求項12に記載の回折型多焦点眼用レンズ。
- 前記回折ゾーンが隣接して設けられた前記等間隔領域において、該等間隔領域の回折ゾーンの間隔Δrが、下式で定められる前記回折構造による0次回折光の焦点像面におけるq次回折光(qはゼロ以外の整数)の位置ρq によって、ρq (mm)<|0.006×f(mm)×q|の範囲となるように定められる請求項1〜13の何れか一項に記載の回折多焦点眼用レンズ。
- 前記等間隔領域の前記回折ゾーンの間隔が、0.1mmから0.5mmである請求項1〜14の何れか一項に記載の回折型多焦点眼用レンズ。
- 前記等間隔領域の回折構造の+1次回折光が複数の焦点を与える請求項1〜15の何れか一項に記載の回折型多焦点眼用レンズ。
- 前記等間隔領域の前記回折構造の+1次回折光による複数の焦点が、前記回折構造を有するレンズにおける光の実質的な入射、または射出範囲を定める開口径の拡大と伴に生成されることを特徴とする請求項16に記載の回折型多焦点眼用レンズ。
- 前記等間隔領域の前記回折構造の+1次回折光による複数の焦点が、前記回折構造を有するレンズにおける光の実質的な入射、または射出範囲を定める開口径が、直径にして1.5mm以上に拡大した時に生成されることを特徴とする請求項17に記載の回折型多焦点眼用レンズ。
- 前記回折構造の0次回折光が与える焦点距離に比して、該回折構造の+1次回折光による焦点距離が小さく設定されている請求項1〜18の何れか一項に記載の回折型多焦点眼用レンズ。
- 前記回折構造が、フレネル間隔の周期構造からなるフレネル領域と、前記等間隔領域とを、有していると共に、該フレネル領域の+1次回折光の焦点距離に比して、該等間隔領域の+1次回折光による複数の焦点のうち少なくとも一つの焦点の焦点距離が大きくされている請求項1〜19の何れか一項に記載の回折型多焦点眼用レンズ。
- 前記フレネル領域の+1次回折光の焦点距離よりも大きな焦点距離を与える前記等間隔領域の+1次回折光の焦点が、前記回折構造を有するレンズにおける光の実質的な入射、または射出範囲を定める開口径が直径にして1.5mm以上に拡大した時に生成されることを特徴とする請求項20に記載の回折型多焦点眼用レンズ。
- レンズに対して回折ゾーンが同心円状に複数形成された回折構造を有する回折型多焦点眼用レンズを製造するに際して、
前記回折構造として、前記回折ゾーンの少なくとも2つの間隔が等しい等間隔領域を形成することを特徴とする回折型多焦点眼用レンズの製造方法。
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US9335563B2 (en) | 2012-08-31 | 2016-05-10 | Amo Groningen B.V. | Multi-ring lens, systems and methods for extended depth of focus |
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US11262598B2 (en) | 2017-06-28 | 2022-03-01 | Amo Groningen, B.V. | Diffractive lenses and related intraocular lenses for presbyopia treatment |
US11327210B2 (en) | 2017-06-30 | 2022-05-10 | Amo Groningen B.V. | Non-repeating echelettes and related intraocular lenses for presbyopia treatment |
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WO2020031321A1 (ja) | 2018-08-09 | 2020-02-13 | 株式会社ニコン | 眼科用レンズ及び眼科用レンズの製造方法 |
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EP2813881A4 (en) | 2015-07-08 |
JP5848368B2 (ja) | 2016-01-27 |
US20140347624A1 (en) | 2014-11-27 |
WO2013118176A1 (ja) | 2013-08-15 |
US9563070B2 (en) | 2017-02-07 |
EP2813881B1 (en) | 2016-07-06 |
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