JP6980209B2 - 光ガイド光学アセンブリ - Google Patents
光ガイド光学アセンブリ Download PDFInfo
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- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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- G02B27/0081—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. enlarging, the entrance or exit pupil
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Laser Surgery Devices (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Endoscopes (AREA)
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Description
図1は従来の先行技術の折り畳み式の光学構造を例示し、ここで、基板(2)は表示源(4)により照射される。表示はコリメート光学系(6)(例えばレンズ)によってコリメートされる。表示源(4)からの光は、主な光線(11)が基板平面と平行になるように、第1の反射面(8)によって基板(2)へ連結される。第2の反射面(12)は、基板からビューアーの目(14)へ光を連結する。この構造はコンパクトであるにもかかわらず、著しい欠点に苛まされている。とりわけ、非常に制限されたFOVだけしか達成することができない。
および該セットの第3の光学部品は、第2の拡大された光を外連結された光として第3の方向で外連結するために構成され;ここで、第1、第2および第3の方向は互いに平行ではない。
引用の便宜上、このセクションは、本明細書において用いられる略語、頭字語、および短い定義の簡潔なリストを含んでいる。このセクションによって本発明が制限されるとみなすべきではない。より完全な説明は、以下において、および適用可能な規格において見出されうる。
1D − 一次元
2D − 二次元
CRT − 陰極線管
EMB − アイモーションボックス
FOV − 視野
HMD − ヘッドマウントディスプレイ
HUD − ヘッドアップディスプレイ
LCD − 液晶ディスプレイ
LOE − 光ガイド光学素子
OLED − 有機発光ダイオードアレイ
OPL − 光路長
SLM − 空間光変調器
TIR − 全内反射
本実施形態に記載の装置の原理および操作は、図面および付随的な説明を参照して十分に理解されることもある。本発明は光学的開口拡大のための光学アセンブリである。その装置によって、回折技術(回折コンポーネント)とファセット反射技術(反射コンポーネント)が組み合わされる。回折コンポーネントを用いる革新的な実施形態は、相反する光パワー(一致)を有する少なくとも2つのコンポーネントを用い、その結果、第1の回折コンポーネントによってもたらされた波長分散が、その後、第2の回折コンポーネントによって取り消される。2つの回折コンポーネントは、(ニアアイディスプレイのための)反射光学部品と組み合わせて用いられ、それによってより効果的な開口拡大を達成し、歪みと雑音を低減する一方、従来の技術と比較して、システムおよび個別のコンポーネントにおける設計制約も低減している。
1)傾斜しているコーティングされたファセットによる反射(例えば、Lumus,Ltd.に対する米国特許第7,457,040号)。この反射技術は広域スペクトルを有し、したがって、単一の光ガイドからの全ての可視スペクトルを投影することができる。このファセットによって、典型的には、伝播する光線を部分的に反射し、伝送することの両方が行われるが、本明細書における簡潔さのために、この技術は、「反射光学部品」によって実施されるように、一般的に引用される。この反射は、典型的には偏光依存性である。
2)光ガイド面における回折パターン。当技術分野において公知のように、回折格子(パターン)は、回折格子の構造に応じて、伝播する光線を反射する、または伝送する。本明細書における簡潔さのために、この技術は、「回折光学部品」によって実施されるように、一般的に引用される。この回折技術はスペクトルおよび角度の両方において限定される。しかしながら、この技術の偏光依存性は低い。
本実施形態では、反射開口エキスパンダは回折エキスパンダの前にある。4つの光ガイドが使用され、それらは反射コンポーネント(201)、および3つの回折コンポーネント(205)、(206)および(207)である。反射コンポーネント(201)は反射を側方に拡大する光ガイドである。この反射光ガイド(201)は、1D光ガイド(図4のAの光ガイド(20)に類似)、または2D光ガイド(図8のCの光ガイド(10)に類似)であってもよい。反射光ガイド(201)へと連結する光は、内連結された光(38)の波長をすべて含み、したがって、反射光ガイド(201)は反射器(図4のAの反射面(16)など)、またはプリズム(図8のCの傾斜されたプリズム(7)など)を含みうる。
Claims (7)
- 光学的開口拡大のための装置であって、前記装置は:
少なくとも2つの光ガイドであって、前記少なくとも2つの光ガイドのうち第1の光ガイド(10)が、内部反射によって光をガイドするために、互いに平行な第1の対の外面を含む、光ガイドと、
1対の第1の一致する回折光学部品(5)および第2の一致する回折光学部品(25)と
を備えているとともに、
前記装置はさらに、
1セットのファセット(40)を含む反射光学部品であって、該1セットのファセット(40)が
(i)互いに平行な、複数の部分反射するファセットを含み、
(ii)前記第1の光ガイド(10)の内部にあり、および
(iii)前記第1の対の外面に対して平行ではない、
反射光学部品と、
入射光(38)を拡大された光(38C)として前記第1の光ガイド(10)に連結するように構成された、前記1対の一致する回折光学部品の第1の回折光学部品(5)であって、前記拡大された光(38C)が前記第1の光ガイド(10)に誘導される、第1の回折光学部品(5)と、
誘導された前記拡大された光(38C)を第2の拡大された光(38D)として前記少なくとも2つの光ガイドの前記第1の光ガイド(10)から第2の光ガイド(2000)に連結するように構成された、前記反射光学部品と、
前記第2の拡大された光(38D)を外連結された光(38B)として外連結するように構成された、前記1対の回折光学部品の第2の回折光学部品(25)と、
前記少なくとも2つの光ガイドに関連付けられるとともに、前記入射光(38)を前記外連結された光(38B)に二次元的に拡大させるように協働する、前記反射光学部品及び前記回折光学部品とを備えており、
前記第1の光ガイド(10)が第1の拡大された光(38C)の二次元(2D)拡大のために構成される、装置。 - (a)前記第1の回折光学部品(5)は、前記第1の光ガイド(10)内の拡大の第1の方向で前記入射光(38)を方向付けるために構成され、それによって、前記第1の拡大された光(38C)を生成し、
(b)前記反射光学部品は、拡大の第2の方向で前記第1の拡大された光(38C)を前記第2の光ガイド(2000)へと連結するために構成され、それによって、前記第2の拡大された光(38D)を生成し、および
(c)前記第2の回折光学部品(25)は、前記第2の拡大された光(38D)を前記外連結された光(38B)として第3の方向で前記第2の光ガイド(2000)から外連結するために構成され、
(d)ここで、前記第1の方向、前記第2の方向、および前記第3の方向は互いに平行ではない、請求項1に記載の装置。 - 前記第1の回折光学部品(5)は、光ガイド(10)に埋め込まれるか、または光ガイド(10)の表面上に構成されるか、もしくは取り付けられる、請求項1に記載の装置。
- 前記反射光学部品は、前記第2の回折光学部品(25)に対して重なり合う関係で構成される、請求項1に記載の装置。
- (i)1対の第3の一致する回折光学部品および第4の一致する回折光学部品、ならびに
(ii)1対の第5の一致する回折光学部品および第6の一致する回折光学部品をさらに含む、請求項1に記載の装置。 - 前記一致する対の前記回折光学部品の各々は、他の一致する対の前記回折光学部品とは異なる回折間隔を有し、前記回折間隔は、前記一致する対の前記回折光学部品の各々が、他の一致する対の前記回折光学部品から類似した角度によって異なる波長を屈折させるような回折間隔である、請求項5に記載の装置。
- 前記波長は、赤色、緑色、および青色の光である、請求項6に記載の装置。
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JP2021182264A JP7365717B2 (ja) | 2017-02-22 | 2021-11-09 | 光ガイド光学アセンブリ |
JP2023168964A JP2023171872A (ja) | 2017-02-22 | 2023-09-29 | 光ガイド光学アセンブリ |
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US201762461805P | 2017-02-22 | 2017-02-22 | |
US62/461,805 | 2017-02-22 | ||
PCT/IL2018/050205 WO2018154576A1 (en) | 2017-02-22 | 2018-02-22 | Light guide optical assembly |
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JP2021182264A Active JP7365717B2 (ja) | 2017-02-22 | 2021-11-09 | 光ガイド光学アセンブリ |
JP2023168964A Pending JP2023171872A (ja) | 2017-02-22 | 2023-09-29 | 光ガイド光学アセンブリ |
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US (6) | US10302835B2 (ja) |
EP (1) | EP3397998A4 (ja) |
JP (3) | JP6980209B2 (ja) |
KR (5) | KR102338472B1 (ja) |
CN (1) | CN108738358B (ja) |
IL (3) | IL292456B (ja) |
TW (1) | TWI754010B (ja) |
WO (1) | WO2018154576A1 (ja) |
Families Citing this family (86)
Publication number | Priority date | Publication date | Assignee | Title |
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US10073264B2 (en) | 2007-08-03 | 2018-09-11 | Lumus Ltd. | Substrate-guide optical device |
IL166799A (en) | 2005-02-10 | 2014-09-30 | Lumus Ltd | Aluminum shale surfaces for use in a conductive substrate |
US10048499B2 (en) | 2005-11-08 | 2018-08-14 | Lumus Ltd. | Polarizing optical system |
IL232197B (en) | 2014-04-23 | 2018-04-30 | Lumus Ltd | Compact head-up display system |
IL235642B (en) | 2014-11-11 | 2021-08-31 | Lumus Ltd | A compact head-up display system is protected by an element with a super-thin structure |
IL237337B (en) | 2015-02-19 | 2020-03-31 | Amitai Yaakov | A compact head-up display system with a uniform image |
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