JP2020510228A - 偏光変換に基づく可変焦点画像デバイス - Google Patents
偏光変換に基づく可変焦点画像デバイス Download PDFInfo
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Classifications
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0825—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a flexible sheet or membrane, e.g. for varying the focus
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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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- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
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- G02F2203/00—Function characteristic
- G02F2203/07—Polarisation dependent
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
- Optical Filters (AREA)
- Optical Elements Other Than Lenses (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Eyeglasses (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aerials With Secondary Devices (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
Description
本願は、2017年2月23日に出願され“VARIABLE−FOCUS VIRTUAL IMAGE DEVICES”と題された米国仮特許出願第62/462,850号の利益を主張するものであり、該米国仮特許出願は、その全体が参照により本明細書中に援用される。この仮特許出願は、以下のセクションを含み、これらの両方が、参照により援用され、本願の一部を形成している。
1.セクションI:“DISPLAY SYSTEM WITH VARIABLE POWER REFLECTOR”(「可変屈折力反射体を有するディスプレイシステム」)と題された出願の部分に対する明細書および図面
2.セクションII:“VARIABLE−FOCUS VIRTUAL IMAGE DEVICES BASED ON POLARIZATION CONVERSION”(「偏光変換に基づく可変焦点仮想画像デバイス」)と題された明細書および図面
本開示は、ディスプレイシステムに関し、より具体的には、少なくとも部分的に偏光変換に基づく回折デバイス備える、拡張現実ディスプレイシステムに関する。
(液晶に基づくブラッグ反射構造)
(コレステリック液晶回折格子(CLCG))
Δλ=Δn・p [2]
(軸外入射角における高帯域幅反射のために構成されるCLCG)
n・sin(θ)=λ/Λ+sin(θinc) [3]
式中、θincは、層法線θの方向に対する入射角であって、θは、層法線の方向に対する反射角であって、nは、反射されたビームが伝搬する、媒体の反射率である。CLC層1158が、軸外角度において入射ビーム1216で照明されると、反射スペクトルは、より短い波長に向かって偏移され得る。本明細書に開示される種々の実施形態によると、比率λ/Λは、0.5〜0.8、0.6〜0.9、0.7〜1.0、0.8〜1.1、0.9〜1.2、1.0〜1.6、1.1〜1.5、または1.2〜1.4の値を有することができる。
(波長選択的光結合のためにCLCGと結合される導波管)
sin(θC)=1/nt [4]
式中、ntは、導波管1604の屈折率である。種々の実施形態によると、ntは、約1〜約2、約1.4〜約1.8、または約1.5〜約1.7であってもよい。例えば、導波管は、ポリカーボネートまたはガラス等のポリマーから成ってもよい。
(波長選択的光結合のためにCLCGおよびミラーと結合される導波管)
(コレステリック液晶軸外ミラー)
(ノッチ反射体に基づく偏光変換器)
(例示的円偏光変換ディスプレイデバイス)
(例示的線形偏光変換ディスプレイデバイス)
(偏光変換器に基づく可変焦点仮想画像システム)
(例示的線形偏光可変焦点レンズ)
(例示的円偏光可変焦点レンズ)
(偏光感受性可変焦点レンズのための例示的空間オフセット補償器)
(可変焦点レンズを伴う例示的偏光アイピース)
(例示的変形可能ミラー可変焦点ディスプレイ)
(コレステリック液晶レンズ)
(CLCレンズの間の例示的動的切替)
(付加的側面)
(付加的考慮点)
Claims (28)
- ディスプレイデバイスであって、
導波管の主要表面と平行方向に全内部反射下で可視光を伝搬するように構成される導波管と、
外部結合要素であって、前記外部結合要素は、前記導波管上に形成され、前記導波管の主要表面に対する法線の方向に前記可視光の一部を外部結合するように構成される、外部結合要素と、
偏光選択的ノッチ反射体であって、前記偏光選択的ノッチ反射体は、前記導波管の第1の側に配置され、第2の偏光を有する可視光を透過させながら、第1の偏光を有する可視光を反射させるように構成される、偏光選択的ノッチ反射体と、
偏光無依存ノッチ反射体であって、前記偏光無依存ノッチ反射体は、前記導波管の第2の側に配置され、前記第1の偏光を有する可視光および前記第2の偏光を有する可視光を反射させるように構成され、前記偏光無依存ノッチ反射体は、そこから反射する可視光の偏光を変換するように構成される、偏光無依存ノッチ反射体と
を備える、ディスプレイデバイス。 - 前記偏光選択的ノッチ反射体および前記偏光無依存ノッチ反射体はそれぞれ、波長範囲外の波長を有する光を透過させながら、赤色、緑色、または青色光のうちの1つに対応する波長範囲内の波長を有する可視光を反射させるように構成される、請求項1に記載のディスプレイデバイス。
- 前記偏光選択的ノッチ反射体は、1つ以上のコレステリック液晶(CLC)層を備える、請求項1に記載のディスプレイデバイス。
- 前記1つ以上のCLC層はそれぞれ、複数のキラル構造を備え、
前記キラル構造はそれぞれ、複数の液晶分子を備え、前記複数の液晶分子は、少なくとも螺旋ピッチによって、層深度方向に延在し、第1の回転方向に連続的に回転され、
前記螺旋ピッチは、前記第1の回転方向における完全1回転による前記キラル構造の液晶分子の正味回転角度に対応する前記層深度方向における長さであり、
前記キラル構造の液晶分子の配列は、前記層深度方向と垂直な側方方向に周期的に変動する、
請求項3に記載のディスプレイデバイス。 - 前記第1の偏光は、第1の円偏光であり、前記第2の偏光は、第2の円偏光である、請求項3に記載のディスプレイデバイス。
- 第1の4分の1波長板と、第2の4分の1波長板とをさらに備え、前記偏光無依存ノッチ反射体は、前記第1の4分の1波長板と前記導波管との間に介在され、前記偏光選択的ノッチ反射体は、前記導波管と前記第2の4分の1波長板との間に介在される、請求項1に記載のディスプレイデバイス。
- 第1の線形偏光レンズと、第2の線形偏光レンズとをさらに備え、前記第1の4分の1波長板は、前記第1の線形偏光レンズと前記偏光無依存ノッチ反射体との間に介在され、前記第2の4分の1波長板は、前記偏光選択的ノッチ反射体と前記第2の線形偏光レンズとの間に介在される、請求項6に記載のディスプレイデバイス。
- 前記偏光無依存ノッチ反射体および前記偏光選択的ノッチ反射体の外側に配置される、第1のパンチャラトナムベリー(PB)レンズと、第2のパンチャラトナムベリー(PB)レンズとをさらに備える、請求項1に記載のディスプレイデバイス。
- 前記偏光無依存ノッチ反射体と前記導波管との間に介在される第1の4分の1波長板をさらに備える、請求項1に記載のディスプレイデバイス。
- 第2の4分の1波長板をさらに備え、前記偏光無依存ノッチ反射体は、前記第1の4分の1波長板と前記第2の4分の1波長板との間に介在される、請求項9に記載のディスプレイデバイス。
- 第1の線形偏光レンズと、第2の線形偏光レンズとをさらに備え、前記第1の4分の1波長板は、前記第1の線形偏光レンズと前記偏光無依存ノッチ反射体との間に介在され、前記偏光選択的ノッチ反射体は、前記導波管と前記第2の線形偏光レンズとの間に介在される、請求項10に記載のディスプレイデバイス。
- 前記偏光無依存ノッチ反射体および前記偏光選択的ノッチ反射体の外側に配置される第1のパンチャラトナムベリー(PB)レンズと、第2のパンチャラトナムベリー(PB)レンズと、前記第2のPBレンズと前記偏光選択的ノッチ反射体との間に介在される第2の4分の1波長板とをさらに備える、請求項9に記載のディスプレイデバイス。
- 画像をユーザの眼に表示するように構成されるディスプレイデバイスであって、前記ディスプレイデバイスは、
光学ディスプレイであって、前記光学ディスプレイは、前方側と、後方側とを備え、前記後方側は、前記前方側よりも前記ユーザの眼に近く、前記光学ディスプレイは、前記後方側に向かって波長範囲を有する光を出力するように構成される、光学ディスプレイと、
前記光学ディスプレイの後方に配置される第1のノッチ反射体であって、前記第1のノッチ反射体は、前記光学ディスプレイから出力される前記波長範囲を有する光を反射させるように構成される、第1のノッチ反射体と、
前記光学ディスプレイの前方に配置される第2のノッチ反射体であって、前記第2のノッチ反射体は、前記波長範囲を有する光を反射させるように構成される、第2のノッチ反射体と
を備え、
前記第1のノッチ反射体は、第1の偏光を有する光を実質的に透過させ、前記第1の偏光と異なる第2の偏光を有する光を実質的に反射させるように構成され、
前記第2のノッチ反射体は、前記第2の偏光を有する後方面上に入射する光を前記第1の偏光に変換するように、かつ、前記光を後方に再指向するように構成される、
ディスプレイデバイス。 - 前記第1のノッチ反射体は、コレステリック液晶(CLC)格子(CLCG)を備える、請求項13に記載のディスプレイデバイス。
- 前記第1のノッチ反射体は、多層を備え、前記第2のノッチ反射体は、非偏光ノッチ反射体と、4分の1波長板とを備える、請求項23に記載のディスプレイデバイス。
- 前記第1のノッチ反射体の後方に配置される第1の可変焦点レンズと、前記第2のノッチ反射体の前方に配置される第2の可変焦点レンズとをさらに備え、前記第2の可変焦点レンズの第2の光学特性は、前記第1の可変焦点レンズの第1の光学特性を補償する、請求項13に記載のディスプレイデバイス。
- 前記第1の可変焦点レンズおよび前記第2の可変焦点レンズはそれぞれ、線形偏光レンズを備える、請求項16に記載のディスプレイデバイス。
- 前記第1の可変焦点レンズおよび前記第2の可変焦点レンズはそれぞれ、パンチャラトナムベリー(PB)位相レンズを備える、請求項16に記載のディスプレイデバイス。
- 前記PB位相レンズによって導入される空間オフセットを補償するように構成される空間オフセット補償器をさらに備える、請求項18に記載のディスプレイデバイス。
- ディスプレイデバイスであって、
導波管であって、前記導波管は、前記導波管の主要表面と平行方向に全内部反射下で可視光を伝搬するように、かつ、前記主要表面に対する法線の方向に前記可視光を外部結合するように構成される、導波管と、
第1の偏光を有する可視光を反射させるように構成されるノッチ反射体であって、前記ノッチ反射体は、1つ以上のコレステリック液晶(CLC)層を備え、前記CLC層はそれぞれ、複数のキラル構造を備え、前記キラル構造はそれぞれ、複数の液晶分子を備え、前記複数の液晶分子は、層深度方向に延在し、第1の回転方向に連続的に回転され、前記キラル構造の液晶分子の配列は、前記1つ以上のCLC層が入射光をブラッグ反射させるように構成されるように、前記層深度方向と垂直な側方方向に周期的に変動する、ノッチ反射体と
を備える、ディスプレイデバイス。 - 前記導波管は、選択的に前記ノッチ反射体に向かって前記可視光を外部結合するように構成される、請求項20に記載のディスプレイデバイス。
- 前記ノッチ反射体は、変形可能ミラーを備え、前記変形可能ミラーは、その上に形成された前記1つ以上のCLC層を有する、請求項20に記載のディスプレイデバイス。
- 前記1つ以上のCLC層のうちの異なるものは、波長範囲外の波長を有する光を透過させるように構成されながら、赤色、緑色、または青色光のうちの異なるものに対応する波長範囲内の波長を有する可視光を反射させるように構成される、請求項20に記載のディスプレイデバイス。
- 前記CLC層のキラル構造はそれぞれ、少なくとも螺旋ピッチによって、層深度方向に延在する複数の液晶分子を備え、前記1つ以上のCLC層のうちの異なるものは、異なる螺旋ピッチを有する、請求項20に記載のディスプレイデバイス。
- 前記1つ以上のCLC層のうちの異なるものは、実質的に同一の屈折力を有する、請求項20に記載のディスプレイデバイス。
- 前記ディスプレイデバイスは、複数のノッチ反射体を備え、前記ノッチ反射体はそれぞれ、第1の偏光を有する可視光を反射させるように構成され、前記ノッチ反射体はそれぞれ、1つ以上のコレステリック液晶(CLC)層を備え、前記CLC層はそれぞれ、複数のキラル構造を備え、前記キラル構造はそれぞれ、複数の液晶分子を備え、前記複数の液晶分子は、層深度方向に延在し、第1の回転方向に連続的に回転され、前記キラル構造の液晶分子の配列は、1つ以上のCLC層が入射光をブラッグ反射させるように構成されるように、前記層深度方向と垂直な側方方向に周期的に変動する、請求項20に記載のディスプレイデバイス。
- 前記複数のノッチ反射体のうちの異なるものは、異なる屈折力を有する、請求項26に記載のディスプレイデバイス。
- 前記複数のノッチ反射体のうちのそれぞれに対応する2分の1波長板をさらに備える、請求項26に記載のディスプレイデバイス。
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