JP7279056B2 - Lidar及びレーザ用測定手法 - Google Patents
Lidar及びレーザ用測定手法 Download PDFInfo
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Description
ここで、Δ=VCOスイープ範囲×VCOスイープレート。そして、2つの周波数についてそれぞれ平均及び差分を取ることによって物体の距離及び速さを同時に且つ明確に算出できる。最後に述べるに、処理済み信号は、興味対象領域におけるポイントオブクラウド(point of cloud)生成のため、及び、車両内インタフェース上でのリアルタイムレンダリングのために用いられ得る。アレイ導波路回折格子(AWG、arrayed-waveguide grating)は、VCO830及びガルバノミラーに関して制御信号をもたらす。VCO830用の信号はVCOの非線形スイープを補うために高次項を伴うカスタム化のこぎり信号とすることができ、ガルバノミラー用の信号は傾斜三角形波形とすることができる。後処理において較正される限り、信号の形状は何でも良い。2チャンネル信号生成器は、5%パルス持続を伴う2~10Hzパルス信号をDAQカードにもたらしてデータ取得をなすのであり、また、50%デューティ比及び最大2V出力を伴う300HzのTTL信号をもって八角形ミラーを制御する。したがって、一部の実施形態では、本願明細書にて説明された車両(或いは例えば飛行機や船等の任意の他の輸送装置)内にて実装された光生成ユニット並びに制御及び信号処理ユニットは、座席の下かその他の場所に置かれ得るのであり、送受信ユニットは車両の天辺にマウントされることができる。光は、長いファイバケーブルを介して送受信ユニットへと伝送され得るのであり、受信信号は長いファイバを介して制御及び信号処理ユニットへと送り戻され得る。2次元走査ユニットは、長いBNCケーブルを介して制御ユニットによって制御されている。2次元走査においては、受信信号はリアルタイム3次元ポイントオブクラウドへとレンダリングでき、これをインタフェース上で表示でき、運転者に対しての表示装置ネットを伴い得る。輸送装置は、現在利用可能な特徴を有しておりこれによって音声及び動画の両方で情報を運転者へと伝達し得る。
Claims (4)
- デュアルコム生成システムであって、
2つのレーザ出力を生成する双方向モードロックフェムト秒レーザと、
10,000rpm以上の回転速度を有し、時計回り方向と比較した反時計回り方向の前記2つのレーザ出力間の反復レート差として少なくとも2キロヘルツの反復レート差を生成する回転台であって、励起ダイオードの励起ファイバを、前記2つのレーザ出力によって共有されるレーザキャビティの回転から切り離し、位相ロックループ電子部品を使用せずに前記2つのレーザ出力を生成し、一方のレーザ出力を他方のレーザ出力に対して調整するファイバ回転ジョイントを含む回転台と、
を備え、
前記双方向モードロックフェムト秒レーザは前記回転台上に配置され、前記回転台は、前記双方向モードロックフェムト秒レーザを励起する前記励起ダイオードに結合され、
ファイバ結合器は、前記2つのレーザ出力を組み合わせる、デュアルコム生成システム。 - 請求項1に記載のデュアルコム生成システムにおいて、前記2つのレーザ出力は相互にコヒーレントである、デュアルコム生成システム。
- 請求項1に記載のデュアルコム生成システムにおいて、時計回り方向と比較した反時計回り方向の前記2つのレーザ出力間の反復レート差は、前記回転台の角速度に比例する、デュアルコム生成システム。
- 請求項1に記載のデュアルコム生成システムにおいて、前記回転台の速さは50,000rpmとされる、デュアルコム生成システム。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2023077976A JP2023109843A (ja) | 2017-11-03 | 2023-05-10 | Lidar及びレーザ用測定手法 |
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US201762581267P | 2017-11-03 | 2017-11-03 | |
US62/581,267 | 2017-11-03 | ||
PCT/US2018/059033 WO2019090131A1 (en) | 2017-11-03 | 2018-11-02 | Lidar and laser measurement techniques |
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