JP5170084B2 - 3次元顕微鏡および3次元画像取得方法 - Google Patents
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Description
Etienne Cuche, Pierre Marquet and Christian Depeursinge, "Simultaneous amplitude-contrast and quantitative phase-contrast microscopy by numerical reconstruction of Fresnel off-axis holograms", Appl. Opt. 38, 6994-7001(1999)
ε0
の2次項は無視する。さらに簡単な計算により、
2ε0
は、0次光の減衰によって
ε0
の2次項は無視する。すなわち、式(12)より、試料が低コントラスト物体である限り、第2の方法によって再現された物体の画像放射照度は、第1の方法によるものに比例する。第2の方法は、最終段階で1回のフーリエ変換を必要とするだけなので、複数回のフーリエ変換を必要とする第2の方法に比較して計算時間は少ない。
Claims (16)
- 物体に対して光を複数の照射方向から順次照射する第1光学系と、
前記物体から発生する回折光と参照光とを撮像部に導く第2光学系と、
前記回折光と前記参照光との干渉像を撮像する撮像部と、
前記撮像部によって取得された前記照射方向ごとの干渉像から前記物体の3次元画像を生成する処理装置と、を含み、
前記処理装置は、前記照射方向ごとの干渉像から前記回折光の複素振幅を求め、該複素振幅から前記物体の吸収率分布及び屈折率分布の少なくとも一方の3次元画像を生成するように構成されたことを特徴とする3次元顕微鏡。 - 前記処理装置が前記照射方向ごとの干渉像から前記物体の吸収率分布の3次元画像および屈折率分布の3次元画像を生成するように構成されたことを特徴とする請求項1に記載の3次元顕微鏡。
- 前記回折光として、透過回折光および反射回折光を使用するように構成されたことを特徴とする請求項1に記載の3次元顕微鏡。
- 前記参照光として、前記物体を透過した0次光を使用するように構成されたことを特徴とする請求項1に記載の3次元顕微鏡。
- 前記参照光として使用される0次光が前記撮像部において飽和しないように、前記第2光学系において減衰部を備えたことを特徴とする請求項4に記載の3次元顕微鏡。
- 前記第2光学系が、0次光の一部が前記参照光として使用される0次光と分離されて、前記回折光と同じ経路を通って前記撮像部に到達するように構成され、
前記処理装置が、前記回折光と同じ経路を通って前記撮像部に到達した0次光の位相を使用して前記回折光および前記参照光の間の位相誤差を補正するように構成されたことを特徴とする請求項4に記載の3次元顕微鏡。 - 前記第2光学系が、前記光を反射する反射鏡を備え、前記反射鏡の傾きを変えることによって前記物体への前記光の照射方向を変化させるように構成されており、前記反射鏡が前記物体の共役位置に配置され、0次光が、前記反射鏡に反射され、照射方向に関係なく、前記物体のフーリエ面の中心に集光されるように構成されたことを特徴とする請求項4に記載の3次元顕微鏡。
- 前記物体のフーリエ面の中心に微小反射鏡が配置され、前記微小反射鏡によって前記参照光として使用される0次光を反射することによって、前記参照光として使用される0次光の経路を前記回折光の経路と分離するように構成されたことを特徴とする請求項7に記載の3次元顕微鏡。
- デジタルホログラフィを使用して物体の3次元画像を生成する3次元画像生成方法であって、
物体に対して光を複数の照射方向から順次照射し、
前記物体から発生する回折光と参照光との干渉像を照射方向ごとに取得し、
照射方向ごとに取得された干渉像から前記回折光の複素振幅を求め、該複素振幅から前記物体の吸収率分布及び屈折率分布の少なくとも一方の3次元画像を生成することを特徴とする3次元画像生成方法。 - 前記照射方向ごとの干渉像から前記物体の吸収率分布の3次元画像および屈折率分布の3次元画像を生成することを特徴とする請求項9に記載の3次元画像生成方法。
- 前記回折光として、透過回折光および反射回折光を使用することを特徴とする請求項9に記載の3次元画像生成方法。
- 前記参照光として0次光を使用することを特徴とする請求項9に記載の3次元画像生成方法。
- 前記参照光として使用される0次光を経路上において減衰させることを特徴とする請求項12に記載の3次元画像生成方法。
- 0次光の一部が前記参照光として使用される0次光と分離されて、前記回折光と同じ経路を通るように構成され、干渉像から前記物体の3次元画像を生成する際に、前記回折光と同じ経路を通った0次光の位相を使用して前記回折光および前記参照光の間の位相誤差を補正することを特徴とする請求項12に記載の3次元画像生成方法。
- 前記光を反射する反射鏡を備え、前記反射鏡の傾きを変えることによって前記物体への前記光の照射方向を変化させ、前記反射鏡が前記物体の共役位置に配置され、0次光が、前記反射鏡に反射され、照射方向に関係なく、前記物体のフーリエ面の中心に集光されることを特徴とする請求項12に記載の3次元画像生成方法。
- 前記物体のフーリエ面の中心に微小反射鏡が配置され、前記微小反射鏡によって前記参照光として使用される0次光を反射することによって、前記参照光として使用される0次光の経路を前記回折光の経路と分離することを特徴とする請求項15に記載の3次元画像生成方法。
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US12/050,645 US7633631B2 (en) | 2007-04-04 | 2008-03-18 | Three-dimensional microscope and method for obtaining three-dimensional image |
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PCT/JP2008/056046 WO2008123408A1 (ja) | 2007-04-04 | 2008-03-28 | 3次元顕微鏡および3次元画像取得方法 |
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- 2008-03-18 US US12/050,645 patent/US7633631B2/en active Active
- 2008-03-28 JP JP2009509194A patent/JP5170084B2/ja active Active
- 2008-03-28 WO PCT/JP2008/056046 patent/WO2008123408A1/ja active Application Filing
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JPWO2008123408A1 (ja) | 2010-07-15 |
US20080259345A1 (en) | 2008-10-23 |
US7633631B2 (en) | 2009-12-15 |
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