JP5583357B2 - レーザ照明システム用のリターダー・ベース・スペックル除去デバイス - Google Patents
レーザ照明システム用のリターダー・ベース・スペックル除去デバイス Download PDFInfo
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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
- G02B27/48—Laser speckle optics
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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
- G02B27/18—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical projection, e.g. combination of mirror and condenser and objective
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/312—Driving therefor
- H04N9/3126—Driving therefor for spatial light modulators in series
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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Description
105 ベースライン・プロジェクタ・システム
110 光源、レーザ源
120 ビーム成形光学部品
121 理想レンズ
140 スペックル除去デバイス
145 フラット位相面
150 ディスプレイ・パネル
160 投射光学部品
170 ディスプレイ・スクリーン
180 検出器、観測者
300 スペックル除去デバイス
300a スペックル除去デバイス
310 近半波リターダー、近HWP、LCリターダー
310a 近半波リターダー、近HWP、LCリターダー
312 面内スイッチング(IPS)材
312a 面内スイッチング(IPS)材
314 第1の平行板
314a 第1の平行板
316 第2の平行板
316a 第2の平行板
320 アクチュエータ
320a アクチュエータ
324 第1のQW層(または多層AQWP)
326 第2のQW層(または多層AQWP)
327 有効光軸
400 スペックル除去デバイス
410 近半波リターダー
424 第1のQWP(または多層AQWP)
425 有効光軸
426 第2のQWP(または多層AQWP)
427 有効光軸
Claims (14)
- レーザ照明システムにおけるスペックルを低減させる方法であって、
光ビーム中にスペックル除去デバイスを挿入すること、ここで前記光ビームが、レーザ照明システム内のコヒーレント・レーザから放出された光を含み、前記スペックル除去デバイスが、前記コヒーレント・レーザから放出された前記光に実質的に半波の奇整数倍のリターデーションを与えるための光リターダーを含み、前記光リターダーが、実質的に一定のリターダンス、および空間的に変えられる遅軸を有し、前記空間的に変えられる遅軸が、前記光ビームに位相マスクを課すためのものであり、前記位相マスクが、検出器上の解像度スポットに対して副解像度光位相変調を行うためのものであり、および
前記副解像度光位相変調が前記検出器の積分時間内で変えられるように、かつ検出された1つの解像度スポットと別の検出された解像度スポットとの間の強度不均一性が低減されるように前記光リターダーを駆動することを含む方法。 - 前記光リターダーを駆動することが、前記検出器の前記積分時間内で前記光ビームの断面の副区画が前記位相マスクの複数の領域をサンプリングするように、前記光リターダーを回転させることおよび振動させることの一方を含む、請求項1に記載の方法。
- 前記光リターダーを駆動することが、液晶セル内の局所的な遅軸方向が前記検出器の前記積分時間内に前記セルの面内で回転するように、液晶セルを電子的に駆動することを含む、請求項1に記載の方法。
- レーザ照明システムにおけるスペックルを低減させる装置であって、
レーザ照明システム内のコヒーレント・レーザから放出される光に実質的に半波の奇整数倍のリターデーションを与えるための光リターダーを含み、前記光リターダーが、実質的に一定のリターダンス、および空間的に変えられる遅軸を有し、前記空間的に変えられる遅軸が、光ビームに位相マスクを課すためのものであり、前記光ビームが、前記コヒーレント・レーザから放出される光を含み、前記位相マスクが、検出器上の解像度スポットに対して副解像度光位相変調を行うためのものであるスペックル除去デバイスと、
前記副解像度光位相変調が前記検出器の積分時間内で変えられるように、かつ検出された1つの解像度スポットと別の検出された解像度スポットとの間の強度不均一性が低減されるように前記光リターダーを駆動するアクチュエータとを備える装置。 - 前記スペックル除去デバイスが、前記光ビームを、第1の偏光を有して直線偏光された光から第1の旋光性を有して円偏光された光に変換するために前記光リターダーの第1の側に配置された第1の4分の1波長板を含み、前記第1の4分の1波長板の軸が前記第1の偏光に対して実質的に±45°に向けられる、請求項4に記載の装置。
- 前記スペックル除去デバイスが、前記第1の旋光性とは反対の第2の旋光性を有して円偏光された光を、第2の偏光を有して直線偏光された光に変換するために前記光リターダーの反対側の第2の側に配置された第2の4分の1波長板を含み、前記第2の4分の1波長板の軸が前記第1の偏光に対して実質的に±45°に向けられ、前記第2の偏光が前記第1の偏光に対して垂直および平行のうちの一方であり、それによって、空間的に変えられる遅軸を有する前記光リターダーが、前記副解像度光位相変調が閉ループ偏光変換により幾何位相変調になるように、前記光リターダーの局所的な遅軸の向きに従って、前記第1の旋光性を有して前記円偏光された光を前記第2の旋光性を有して前記円偏光された光に変換する、請求項5に記載の装置。
- 前記第1および第2の4分の1波長板が色消し4分の1波長板である、請求項6に記載の装置。
- 前記光リターダーが、第1と第2の板の間に配置された液晶を含み、前記アクチュエータが、前記液晶の領域の横方向全体にわたって電圧を印加するための複数のパターン化電極を含み、前記印加電圧が、前記液晶の局所的な遅軸方向をその面内で回転させるものであり、かつ変えられた前記副解像度光位相変調を提供するものである、請求項4から7のいずれかに記載の装置。
- 前記空間的に変えられる遅軸が固定され、前記光ビームの断面の副区画が前記位相マスクの複数の領域をサンプリングし、かつ変えられた前記副解像度光位相変調を提供するように、前記アクチュエータが光リターダーを動かすためのモータを含む、請求項4から7のいずれかに記載の装置。
- 前記モータが、前記光リターダーの直線並進移動および回転並進移動のうちの一方を実現する、請求項9に記載の装置。
- 前記光リターダーが液晶ポリマーを含む、請求項9に記載の装置。
- 前記液晶ポリマーが、無配向、ランダム配向、および疑似ランダム配向の配向層のうちの1つの上にコーティングされる、請求項11に記載の装置。
- 前記配向層が線状重合可能ポリマーを含む、請求項12に記載の装置。
- 前記空間的に変えられる遅軸が複数の遅軸方向を含み、各遅軸方向が実質的に前記光リターダーの面と平行である、請求項4から7のいずれかに記載の装置。
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US4501208P | 2008-04-15 | 2008-04-15 | |
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US (1) | US7715084B2 (ja) |
EP (1) | EP2110703B1 (ja) |
JP (1) | JP5583357B2 (ja) |
KR (1) | KR101563995B1 (ja) |
CN (1) | CN101592786B (ja) |
AT (1) | ATE478357T1 (ja) |
DE (1) | DE602009000115D1 (ja) |
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JP2009258738A (ja) | 2009-11-05 |
KR20090109510A (ko) | 2009-10-20 |
EP2110703B1 (en) | 2010-08-18 |
EP2110703A1 (en) | 2009-10-21 |
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DE602009000115D1 (de) | 2010-09-30 |
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