JP4510639B2 - 回折効率のバランスをとるための回折格子素子 - Google Patents
回折効率のバランスをとるための回折格子素子 Download PDFInfo
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- JP4510639B2 JP4510639B2 JP2004560539A JP2004560539A JP4510639B2 JP 4510639 B2 JP4510639 B2 JP 4510639B2 JP 2004560539 A JP2004560539 A JP 2004560539A JP 2004560539 A JP2004560539 A JP 2004560539A JP 4510639 B2 JP4510639 B2 JP 4510639B2
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- 239000000758 substrate Substances 0.000 claims description 41
- 210000001747 pupil Anatomy 0.000 claims description 31
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0944—Diffractive optical elements, e.g. gratings, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1842—Gratings for image generation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/32—Holograms used as optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12107—Grating
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Transforming Electric Information Into Light Information (AREA)
Description
周期=A* [sin(2πx/d)+0.25sin(4πx/d)+0.05sin(6πx/d) (1)
但し、A=格子の最大の高さ(振幅)
X=単一の格子周期の範囲内での位置
d=単一の格子周期の長さ
η=(0.5-kθ)R+1 (-θ) + (0.5 + kθ) R-1(θ) (2)
Claims (11)
- 仮想表示装置の射出瞳を拡大する射出瞳拡大器(EPE)であって、該射出瞳拡大器(EPE)は、導波基板(S)と、該導波基板(S)上に設けられた、または該導波基板(S)に埋め込まれた回折格子素子(SG)を備える射出瞳拡大器において、
選択した回折次数(−1, +1)の方向に、前記基板(S)内を導波された少なくとも1つの回折光波(R-1,R+1)を形成するように、前記入射光波(W)からのエネルギを前記基板(S)の中へ導入するために、該回折格子素子(SG)が、入射光波(W)に対して相互作用を行うように構成され、
入射光波(W)の入射角度(θ)の変動を相互に補償するように、前記基板(S)内を伝播する前記少なくとも1つの回折光波(R-1,R+1)のトータルの回折効率に対して、該回折格子素子(SG)が、異なる回折特性を有し、遷移点(TP)に関して反対側に設けられる少なくとも2つの異なる格子領域(BGleft,BGright; MBGleft,MBGright)を備え、
前記格子領域(BGleft,BGright;MBGleft,MBGright)のうちの少なくとも一つの領域が、非対称周期プロファイルを持つ、
ことを特徴とする射出瞳拡大器(EPE)。 - 前記格子領域(BGleft,BGright;MBGleft,MBGright)のうちの少なくとも一つの領域が、ブレーズ周期のプロファイルを有することを特徴とする請求項1に記載の射出瞳拡大器(EPE)。
- 該回折格子素子(SG)が、格子周期プロファイルが遷移点(TP)に関して実質的に互いに鏡像をなす2つの異なる格子領域(BGleft,BGright)を備えることを特徴とする請求項1に記載の射出瞳拡大器(EPE)。
- 該回折格子素子(SG)が、格子周期プロファイルが実質的に異なる深度を有する少なくとも2つの異なる格子領域(BGleft,BGright)を備えることを特徴とする請求項1に記載の射出瞳拡大器(EPE)。
- 前記格子領域(BGleft,BGright;MBGleft,MBGright)のうちの少なくとも一つの格子領域の回折効率が、前記遷移点(TP)から測定した異なる局所距離において変動するように構成されることを特徴とする請求項1に記載の射出瞳拡大器(EPE)。
- 前記入射光波(W)が前記回折格子素子(SG)と最初に相互作用を行う領域内に前記遷移点(TP)が位置することを特徴とする請求項1に記載の射出瞳拡大器(EPE)。
- 前記入射光波(W)の前記回折格子素子(SG)との最初の相互作用が、実質的に単一の格子領域(MBGright)内で行われるように構成されることを特徴とする請求項1に記載の射出瞳拡大器(EPE)。
- 前記格子領域(MBGleft)のうちの少なくとも1つを、前記基板(S)内を導波する前記光波を前記基板(S)の内部で逆方向へ向かって戻す再指向あるいは再循環を行うように構成することを特徴とする請求項7に記載の射出瞳拡大器(EPE)。
- 前記回折格子素子(SG)が、両眼用または単眼用光学系の射出瞳を拡大するように構成されることを特徴とする請求項1に記載の射出瞳拡大器(EPE)。
- 導波基板(S)と、
像点の第1の位置と、像点の第2の位置を有するイメージャ(imager)と、
光を前記第1の位置のポイントから前記基板に第1の入射光波(W)を形成するように向け、光を前記第2の位置のから前記基板に第2の入射光波(W)を形成するように向ける入力光学系と、
第1の選択した回折次数(+1)の方向に、前記基板(S)内を導波された第1の回折光波(R-1,right,R+1, left)を形成するために、及び、第2の選択した回折次数(−1)の方向に、前記基板(S)内を導波された第2の回折光波(R-1,right ,R-1, left)を形成するために、前記第1の入射光波(W)のエネルギを前記基板(S)の中へ導入するように構成した回折格子素子(SG)と、
を備える装置であって、
前記回折格子素子(SG)が、第1の選択した回折次数(+1)の方向に、前記基板(S)内を伝播する第1の回折光波(R-1,right ,R+1, left)を形成するために、及び、第2の選択した回折次数(−1)の方向に、前記基板(S)内を伝播する第2の回折光波(R-1,right ,R-1, left)を形成するために、前記第2の入射光波(W)のエネルギを前記基板(S)の中へ導入するように構成され、
前記回折格子素子(SG)が、前記第1の選択した回折次数(+1)の方向と前記第2の選択した回折次数(−1)の方向との間の光の分布が、前記第1の位置から向けられた光の代わりに前記第2の位置から向けられたときに実質的に同一のままであるように構成されるような、異なる回折特性を有する少なくとも2つの異なる格子領域(BGleft,BGright)を備え、
前記入力光学系が、さらに、前記回折格子素子(SG)上の前記第2の入射光波(W)を前記第1の入射光波(W)に対してシフトするように構成される、装置。 - 前記第1の位置が、前記イメージャの表面の中心に位置し、前記第2の位置が、前記イメージャの端縁の近傍に位置する請求項10に記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20022199A FI114946B (fi) | 2002-12-16 | 2002-12-16 | Diffraktiivinen hilaelementti diffraktiohyötysuhteen tasapainottamiseksi |
PCT/FI2003/000948 WO2004055556A1 (en) | 2002-12-16 | 2003-12-12 | Diffractive grating element for balancing diffraction efficiency |
Publications (2)
Publication Number | Publication Date |
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JP2006510059A JP2006510059A (ja) | 2006-03-23 |
JP4510639B2 true JP4510639B2 (ja) | 2010-07-28 |
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Application Number | Title | Priority Date | Filing Date |
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JP2004560539A Expired - Lifetime JP4510639B2 (ja) | 2002-12-16 | 2003-12-12 | 回折効率のバランスをとるための回折格子素子 |
Country Status (9)
Country | Link |
---|---|
US (1) | US7483604B2 (ja) |
EP (1) | EP1573369B1 (ja) |
JP (1) | JP4510639B2 (ja) |
KR (1) | KR100669162B1 (ja) |
CN (1) | CN1726412B (ja) |
AU (1) | AU2003285384A1 (ja) |
FI (1) | FI114946B (ja) |
PT (1) | PT1573369E (ja) |
WO (1) | WO2004055556A1 (ja) |
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- 2003-12-12 CN CN2003801063489A patent/CN1726412B/zh not_active Expired - Lifetime
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AU2003285384A1 (en) | 2004-07-09 |
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EP1573369B1 (en) | 2014-07-09 |
WO2004055556A1 (en) | 2004-07-01 |
US7483604B2 (en) | 2009-01-27 |
PT1573369E (pt) | 2014-08-29 |
JP2006510059A (ja) | 2006-03-23 |
FI20022199A0 (fi) | 2002-12-16 |
EP1573369A1 (en) | 2005-09-14 |
US20060051024A1 (en) | 2006-03-09 |
FI114946B (fi) | 2005-01-31 |
CN1726412A (zh) | 2006-01-25 |
FI20022199A (fi) | 2004-06-17 |
KR100669162B1 (ko) | 2007-01-16 |
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