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JPH0342615A - Multi-focal eyeglasses - Google Patents

Multi-focal eyeglasses

Info

Publication number
JPH0342615A
JPH0342615A JP17833189A JP17833189A JPH0342615A JP H0342615 A JPH0342615 A JP H0342615A JP 17833189 A JP17833189 A JP 17833189A JP 17833189 A JP17833189 A JP 17833189A JP H0342615 A JPH0342615 A JP H0342615A
Authority
JP
Japan
Prior art keywords
lens
liquid crystal
cell
molecules
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17833189A
Other languages
Japanese (ja)
Inventor
Yoshi Kobayakawa
小早川 嘉
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.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP17833189A priority Critical patent/JPH0342615A/en
Publication of JPH0342615A publication Critical patent/JPH0342615A/en
Pending legal-status Critical Current

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  • Eyeglasses (AREA)

Abstract

PURPOSE:To eliminate partial division in a lens plane by enclosing liquid crystal in the lens part of a liquid crystal cell, orienting liquid crystal molecules in a constant direction perpendicular to the optical axis of the lens, and preventing light which is incident on the liquid crystal from being polarized. CONSTITUTION:A member 1 is glass which has a concave internal surface and a convex external surface, a member 3 is plate glass, and both members are adhered with each other. The nematic liquid crystal is enclosed in the internal lens-shaped cell part 2 which is formed at this time. Both internal surfaces of the cell 2 are rubbed as shown by lines 7, and consequently molecules of the liquid crystal enclosed in the cell are all oriented in the same direction, so that the nematic liquid crystal is birefringent having an axis in the direction of the molecules. When this lens is used as a spectacle lens, the light incident on the liquid crystal part is unpolarized light because of the absence of a deflecting filter and has two focuses according to a polarizing direction. Consequently, the multi-focal lens whose lens surfaces are not divided partially is obtained.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は例えはメガネレンズや眼内レンズ等の眼用レン
ズに関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to ophthalmic lenses, such as spectacle lenses and intraocular lenses.

[従来の技術] 主に老視用に用いられる従来の多焦点眼用レンズ、例え
ば遠近両用メガネレンズは、メガネレンズの一部に異な
る焦点距離のレンズを張り付けている。
[Prior Art] Conventional multifocal ophthalmic lenses used mainly for presbyopia, such as bifocal eyeglass lenses, have lenses with different focal lengths attached to part of the eyeglass lens.

又、従来の多焦点の眼内レンズは、前記遠近両用メガネ
レンズと同様に、部分的にパワーを変えている。
Furthermore, the power of the conventional multifocal intraocular lens is partially changed, similar to the bifocal eyeglass lens described above.

[発明が解決しようとしている課題] しかしながら、前記従来の遠近両用のメガネレンズでは
、焦点を変えるには使用者が目を動かさなくてはならな
い。又、前記従来の多焦点の眼内レンズでは、一般に人
間の瞳の大きさには個人差があるため、部分的にパワー
を変える方法では不都合である。
[Problems to be Solved by the Invention] However, with the conventional bifocal eyeglass lenses, the user must move his or her eyes to change the focus. Furthermore, in the conventional multifocal intraocular lens, since there are generally individual differences in the size of human pupils, it is inconvenient to use a method of partially changing the power.

本発明はレンズ面内の部分的分割が無い多焦点眼用レン
ズの提供を目的とする。
The present invention aims to provide a multifocal ophthalmic lens without partial division within the lens plane.

[il!題を解決するための手段] 上述した課題を解決する本発明は、液晶セル内部のレン
ズ部に液晶を封入し、該封入される液晶の液晶分子はレ
ンズの光軸垂直な一定方向に配向され、該液晶に入射す
る光を偏光させないように構成したう焦点眼用レンズで
ある。
[il! [Means for Solving the Problems] The present invention for solving the above-mentioned problems involves sealing a liquid crystal in a lens portion inside a liquid crystal cell, and liquid crystal molecules of the liquid crystal to be sealed are oriented in a certain direction perpendicular to the optical axis of the lens. This is an ophthalmic lens constructed so that the light incident on the liquid crystal is not polarized.

又、複屈折性物質の結晶軸を、レンズの光軸垂直な一定
方向に向けるように構成した多焦点眼用レンズである。
Further, it is a multifocal ophthalmic lens configured such that the crystal axis of the birefringent substance is oriented in a certain direction perpendicular to the optical axis of the lens.

[実施例コ 以下、本発明を遠近両用メガネレンズに適用した実施例
を図面を用いて説明する。第1図て部材1は内面を凹レ
ンズ、外面を凸レンズにしたガラス、部材3は板ガラス
であり、両部材か貼り合わされる。この時できる内部の
レンズ状セル部2にはネマチック液晶か封入されている
[Example 7] Hereinafter, an example in which the present invention is applied to a bifocal eyeglass lens will be described with reference to the drawings. In FIG. 1, member 1 is glass with a concave lens on the inner surface and a convex lens on the outer surface, member 3 is a plate glass, and both members are bonded together. Nematic liquid crystal is sealed in the internal lens-shaped cell portion 2 formed at this time.

第2図は第1図を光軸4の方向から見た図てあり、セル
2の内面は両面共に線7に示す方向にラビング処理か施
されており、これによりセル内に封入される液晶の分子
は全て同し方向に配列される。この時、ネマチック液晶
は分子の方向を軸として複屈折性を示す。
FIG. 2 is a view of FIG. 1 viewed from the direction of the optical axis 4. The inner surface of the cell 2 is rubbed on both sides in the direction shown by the line 7, and as a result, the liquid crystal sealed in the cell is rubbed. All molecules of are aligned in the same direction. At this time, the nematic liquid crystal exhibits birefringence with the direction of the molecules as an axis.

このレンズをメガネレンズとした時、従来の可変焦点の
液晶レンズ等とは異なり偏向フィルタか無いため、液晶
部へ入射する光は無偏光てあり、偏光方向によって二つ
の焦点を持つ。?夜晶セル1の外面の曲率を使用者に合
わせて設定して、二つの焦点を遠用と近用に合わせれば
、遠近両用のレンズとすることかてきる。このレンズを
用いたメガネを使用した人間は、遠近二つの像か眼底の
網膜に写ることになるか、関心のある方のみを選択的に
知覚することかてきる。
When this lens is used as an eyeglass lens, unlike conventional variable focus liquid crystal lenses, there is no polarizing filter, so the light that enters the liquid crystal part is unpolarized and has two focal points depending on the polarization direction. ? By setting the curvature of the outer surface of the night crystal cell 1 to suit the user and adjusting the two focal points for distance and near vision, it is possible to create a bifocal lens. When a person wears glasses with this lens, two images, near and far, are reflected on the retina of the fundus of the eye, or they may selectively perceive only the one they are interested in.

第3図、第4図は本発明を眼内レンズに適用した別の実
施例の側面図及び平面図である。
FIGS. 3 and 4 are a side view and a plan view of another embodiment in which the present invention is applied to an intraocular lens.

眼内レンズ6の材質は、例え□は方解石や水晶の如く複
屈折性の物質が用いられ、複屈折性物質の結晶軸がレン
ズの光軸垂直な一定方向になるように切削研磨して作成
される。第4図の線5は結晶軸の方向であり、第4図の
紙面に平行、且つ光軸4に垂直である。
The material of the intraocular lens 6 is a birefringent substance such as calcite or quartz, and the intraocular lens 6 is made by cutting and polishing so that the crystal axis of the birefringent substance is in a certain direction perpendicular to the optical axis of the lens. be done. Line 5 in FIG. 4 is the direction of the crystal axis, which is parallel to the plane of the paper of FIG. 4 and perpendicular to the optical axis 4.

[発明の効果] 本発明によれは、レンズ面の部分分割てはない多焦点眼
用レンズを提供することかできるのて、この眼用レンズ
の使用者は従来の多焦点レンズの時のように目を動かす
必要か無く、又、瞳の大きさの個人差に影響を受けるこ
とも無い。
[Effects of the Invention] According to the present invention, it is possible to provide a multifocal ophthalmic lens in which the lens surface is not partially divided. There is no need to move the eyes, and it is not affected by individual differences in pupil size.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明を液晶多焦点レンズに適用した図、 第2図はその平面図、 第3図は本発明を眼内レンズに適用した図、第4図はそ
の平面図、 てあり、図中の符号は、 1・・・・ガラス、 2・・・・7夜晶セル、 3・・・・板ガラス、 5・・・・結晶軸方向、 7・・・・ラビング処理、
Fig. 1 is a diagram in which the present invention is applied to a liquid crystal multifocal lens, Fig. 2 is a plan view thereof, Fig. 3 is a diagram in which the present invention is applied to an intraocular lens, and Fig. 4 is a plan view thereof. The symbols in the diagram are: 1...Glass, 2...7 Night crystal cell, 3...Plate glass, 5...Crystal axis direction, 7...Rubbing treatment,

Claims (2)

【特許請求の範囲】[Claims] (1)液晶セル内部のレンズ部に液晶を封入し、該封入
される液晶の液晶分子はレンズの光軸垂直な一定方向に
配向され、該液晶に入射する光を偏光させないように構
成した多焦点眼用レンズ。
(1) Liquid crystal is sealed in the lens part inside the liquid crystal cell, and the liquid crystal molecules of the sealed liquid crystal are oriented in a certain direction perpendicular to the optical axis of the lens, and the light incident on the liquid crystal is not polarized. Focal ophthalmic lenses.
(2)複屈折性物質の結晶軸を、レンズの光軸垂直な一
定方向に向けるように構成した多焦点眼用レンズ。
(2) A multifocal ophthalmic lens configured so that the crystal axis of the birefringent substance is oriented in a certain direction perpendicular to the optical axis of the lens.
JP17833189A 1989-07-10 1989-07-10 Multi-focal eyeglasses Pending JPH0342615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17833189A JPH0342615A (en) 1989-07-10 1989-07-10 Multi-focal eyeglasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17833189A JPH0342615A (en) 1989-07-10 1989-07-10 Multi-focal eyeglasses

Publications (1)

Publication Number Publication Date
JPH0342615A true JPH0342615A (en) 1991-02-22

Family

ID=16046626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17833189A Pending JPH0342615A (en) 1989-07-10 1989-07-10 Multi-focal eyeglasses

Country Status (1)

Country Link
JP (1) JPH0342615A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002323680A (en) * 2001-04-24 2002-11-08 Norio Karube Variable refraction control spectacles
JP2020522293A (en) * 2017-06-01 2020-07-30 カール・ツアイス・メディテック・アーゲー Artificial crystalline lens with laser-generated birefringent structure and method of manufacturing synthetic crystalline lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002323680A (en) * 2001-04-24 2002-11-08 Norio Karube Variable refraction control spectacles
JP2020522293A (en) * 2017-06-01 2020-07-30 カール・ツアイス・メディテック・アーゲー Artificial crystalline lens with laser-generated birefringent structure and method of manufacturing synthetic crystalline lens
US11583391B2 (en) 2017-06-01 2023-02-21 Carl Zeiss Meditec Ag Artificial eye lens with laser-generated birefringent structure and method for producing an artificial eye lens

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