JP2020046424A - 光電センサ及び光線の偏向方法 - Google Patents
光電センサ及び光線の偏向方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 24
- 230000005693 optoelectronics Effects 0.000 title abstract 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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
- G02B26/0808—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 diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1828—Diffraction gratings having means for producing variable diffraction
-
- 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
- G02F1/292—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 by controlled diffraction or phased-array beam steering
-
- 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
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/44—Grating systems; Zone plate systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
- G02B5/1819—Plural gratings positioned on the same surface, e.g. array of gratings
- G02B5/1823—Plural gratings positioned on the same surface, e.g. array of gratings in an overlapping or superposed manner
Abstract
Description
g=g0 偏向角への寄与 1*0.9度 幾何学的なプリズム角:6度
g=2*g0 偏向角への寄与 2*0.9度=1.8度 幾何学的なプリズム角:12度
g=4*g0 偏向角への寄与 4*0.9度=3.6度 幾何学的なプリズム角:23度
g=8*g0 偏向角への寄与 8*0.9度=7.2度 幾何学的なプリズム角:44度
g=16*g0 偏向角への寄与 16*0.9度=14.4度 幾何学的なプリズム角:74度 25次までの回折次数に使用
g=16*g0 偏向角への寄与 16*0.9度=14.4度 幾何学的なプリズム角:86度 26〜31次の回折次数に使用
Claims (15)
- 受光器(30)と、該受光器(30)の前に配置された受光光学系(26、28)と、制御及び評価ユニット(32)とを有し、前記受光光学系(26、28)が、前後に並べて配置された格子定数が異なる複数の切替可能なブレーズド回折格子(34a〜d)を有する光線偏向装置(26)を備え、前記制御及び評価ユニット(32)が前記光線偏向装置(26)の所望の偏向角に応じてブレーズド回折格子(34a〜d)のオン/オフを切り替えるように構成されている光電センサ(10)において、
少なくとも2つのブレーズド回折格子(34c〜d)が、格子定数は同じであるがブレーズ角が互いに異なっていることを特徴とする光電センサ(10)。 - 前記制御及び評価ユニット(32)が、所望の偏向角に依存してその都度、同じ格子定数を持つブレーズド回折格子(34c〜d)のうち1つだけをオンにするように構成されていることを特徴とする請求項1に記載のセンサ(10)。
- 各格子定数が基本格子定数の倍数であることを特徴とする請求項1又は2に記載のセンサ(10)。
- 前記格子定数が互いに2^nの比率になっていることを特徴とする請求項3に記載のセンサ(10)。
- 前記制御及び評価ユニット(32)がある角度分解能で前記光線偏向装置(26)の受光角度範囲にわたって偏向角を変化させるように構成されていることを特徴とする請求項1〜4のいずれかに記載のセンサ(10)。
- 前記受光器(30)が単独の検出器であることを特徴とする請求項1〜5のいずれかに記載のセンサ(10)。
- 前記受光光学系(26、28)が、前後に並べて配置された、互いに格子定数が異なる複数の切替可能なブレーズド回折格子を有する別の光線偏向装置であって、そのブレーズド回折格子の向きが前記光線偏向装置(26)に対して交差しているものを備えていることを特徴とする請求項1〜6のいずれかに記載のセンサ(10)。
- 前記光線偏向装置(26)が受信光(24)の中間の入射方向に対して斜めになっていることを特徴とする請求項1〜7のいずれかに記載のセンサ(10)。
- 前記光線偏向装置(26)が少なくとも1つの波長板(38)を備えていることを特徴とする請求項1〜8のいずれかに記載のセンサ(10)。
- 発光器(12)と、発射光線(16)を所望の偏向角で送出するための発光側の光線偏向装置(18)を有する発光光学系(14、18)とを備えていることを特徴とする請求項1〜9のいずれかに記載のセンサ(10)。
- 前記発光側の光線偏向装置(18)が、前後に並べて配置された、互いに格子定数が異なる複数の切替可能なブレーズド回折格子を備えていることを特徴とする請求項10に記載のセンサ(10)。
- 前記光線偏向装置(26)が前記発光側の光線偏向装置(18、26)として二重の役割を果たしていることを特徴とする請求項11に記載のセンサ(10)。
- 前記制御及び評価ユニット(32)が、送出されて前記受光器(30)により再び受光された発射光線(16、24)の光伝播時間を測定するように構成されていることを特徴とする請求項1〜12に記載のセンサ(10)。
- 格子定数が異なる複数の切替可能なブレーズド回折格子(34a〜d)を前後に並べて配置したものを用いて光線(24)を偏向させる方法であって、前記光線(24)が前記複数のブレーズド回折格子(34a〜d)に順番に当たり、その際、前記光線(24)を偏向させる所望の偏向角に応じて特定のブレーズド回折格子(34a〜d)のオン/オフを切り替える方法において、
前記偏向角に応じてその都度、格子定数は同じであるがブレーズ角が互いに異なる少なくとも2つのブレーズド回折格子(34c〜d)のうち一方のみをオンに切り替える方法。 - 監視領域(20)を光学的に走査する方法であって、受信光(24)を様々な偏向角から順次受光し、その際に該偏向角を請求項14に記載の方法で変化させることを特徴とする方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP18195533.7 | 2018-09-19 | ||
EP18195533.7A EP3627175B1 (de) | 2018-09-19 | 2018-09-19 | Optoelektronischer sensor und verfahren zur ablenkung eines lichtstrahls |
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JP2020046424A true JP2020046424A (ja) | 2020-03-26 |
JP6864053B2 JP6864053B2 (ja) | 2021-04-21 |
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US (1) | US11486973B2 (ja) |
EP (1) | EP3627175B1 (ja) |
JP (1) | JP6864053B2 (ja) |
Cited By (1)
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JP7380865B2 (ja) | 2020-05-19 | 2023-11-15 | 日本電信電話株式会社 | 角度計測装置 |
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EP4162289A1 (de) * | 2020-06-09 | 2023-04-12 | Leddartech Inc. | Lidar system mit grobwinkelsteuerung |
CN112285921B (zh) * | 2020-11-17 | 2022-01-28 | 中国工程物理研究院激光聚变研究中心 | 一种光束扫描方法及系统 |
Citations (4)
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JPH04269725A (ja) * | 1990-12-03 | 1992-09-25 | Raytheon Co | 2次元フェーズド・アレイ光ビーム指向装置 |
JP2011209262A (ja) * | 2010-03-26 | 2011-10-20 | Ind Technol Res Inst | 調整式レンジファインダー及びその距離測定方法 |
WO2013014875A1 (ja) * | 2011-07-22 | 2013-01-31 | パナソニック株式会社 | 液晶表示装置 |
JP2013195995A (ja) * | 2012-03-23 | 2013-09-30 | Stanley Electric Co Ltd | 光偏向液晶素子 |
Family Cites Families (11)
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US6567573B1 (en) | 1997-02-12 | 2003-05-20 | Digilens, Inc. | Switchable optical components |
DE19757849C5 (de) | 1997-12-24 | 2013-11-21 | Sick Ag | Scanner und Vorrichtung zur optischen Erfassung von Hindernissen, sowie deren Verwendung |
WO2001073504A1 (en) | 2000-03-27 | 2001-10-04 | California Institute Of Technology | Adjustable liquid crystal blazed grating deflector |
US9366938B1 (en) | 2009-02-17 | 2016-06-14 | Vescent Photonics, Inc. | Electro-optic beam deflector device |
US8982313B2 (en) | 2009-07-31 | 2015-03-17 | North Carolina State University | Beam steering devices including stacked liquid crystal polarization gratings and related methods of operation |
EP2708914A1 (de) | 2012-09-18 | 2014-03-19 | Sick Ag | Optoelektronischer Sensor und Verfahren zur Erfassung einer Tiefenkarte |
KR20240005987A (ko) * | 2014-09-29 | 2024-01-12 | 매직 립, 인코포레이티드 | 상이한 파장의 광을 도파관 밖으로 출력하기 위한 아키텍쳐 및 방법 |
EP3359999A1 (en) * | 2015-10-05 | 2018-08-15 | Popovich, Milan Momcilo | Waveguide display |
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US10761391B2 (en) * | 2017-05-23 | 2020-09-01 | The United States Of America As Represented By The Secretary Of The Air Force | Optical attenuator |
WO2019136476A1 (en) * | 2018-01-08 | 2019-07-11 | Digilens, Inc. | Waveguide architectures and related methods of manufacturing |
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- 2018-09-19 EP EP18195533.7A patent/EP3627175B1/de active Active
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- 2019-09-11 JP JP2019165104A patent/JP6864053B2/ja active Active
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04269725A (ja) * | 1990-12-03 | 1992-09-25 | Raytheon Co | 2次元フェーズド・アレイ光ビーム指向装置 |
JP2011209262A (ja) * | 2010-03-26 | 2011-10-20 | Ind Technol Res Inst | 調整式レンジファインダー及びその距離測定方法 |
WO2013014875A1 (ja) * | 2011-07-22 | 2013-01-31 | パナソニック株式会社 | 液晶表示装置 |
JP2013195995A (ja) * | 2012-03-23 | 2013-09-30 | Stanley Electric Co Ltd | 光偏向液晶素子 |
Cited By (1)
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JP7380865B2 (ja) | 2020-05-19 | 2023-11-15 | 日本電信電話株式会社 | 角度計測装置 |
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US11486973B2 (en) | 2022-11-01 |
US20200088849A1 (en) | 2020-03-19 |
EP3627175B1 (de) | 2020-07-22 |
EP3627175A1 (de) | 2020-03-25 |
JP6864053B2 (ja) | 2021-04-21 |
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