JP2017101973A5 - - Google Patents
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- JP2017101973A5 JP2017101973A5 JP2015233996A JP2015233996A JP2017101973A5 JP 2017101973 A5 JP2017101973 A5 JP 2017101973A5 JP 2015233996 A JP2015233996 A JP 2015233996A JP 2015233996 A JP2015233996 A JP 2015233996A JP 2017101973 A5 JP2017101973 A5 JP 2017101973A5
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- interference
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- interference signal
- coherence tomography
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- 230000003287 optical Effects 0.000 claims 21
- 238000003325 tomography Methods 0.000 claims 10
- 238000005259 measurement Methods 0.000 claims 6
Claims (5)
測定光源と、
前記測定光源から出射された測定光と参照光が合成された干渉光を、複数の干渉光に分割する分割光学系と、
前記分割光学系によって分割された複数の干渉光のうち、１つまたは複数の干渉光を検出して第１干渉信号を出力する第１チャンネルと、
前記分割光学系によって分割された複数の干渉光のうち、前記第１チャンネルによって検出される干渉光とは異なる１つまたは複数の干渉光を検出して第２干渉信号を出力する第２チャンネルと、
前記第１干渉信号および前記第２干渉信号を入力して処理することで、被検物の内部情報を取得する制御部と、
を備え、
前記制御部は、
前記第１チャンネルと前記第２チャンネルの間の特性差に起因する、前記第１干渉信号と前記第２干渉信号の間の波長帯域のずれである帯域ずれを補償して、前記内部情報を取得することを特徴とする光コヒーレンストモグラフィ装置。 An optical coherence tomography device,
A measurement light source;
A splitting optical system that splits interference light obtained by combining measurement light and reference light emitted from the measurement light source into a plurality of interference light;
A first channel that detects one or a plurality of interference lights among the plurality of interference lights divided by the division optical system and outputs a first interference signal;
A second channel that detects one or a plurality of interference lights different from the interference light detected by the first channel among the plurality of interference lights divided by the division optical system and outputs a second interference signal; ,
A control unit for acquiring internal information of the test object by inputting and processing the first interference signal and the second interference signal;
With
The controller is
The internal information is acquired by compensating for a band shift, which is a wavelength band shift between the first interference signal and the second interference signal, caused by a characteristic difference between the first channel and the second channel. An optical coherence tomography apparatus.
前記第１チャンネルは、
干渉光を検出する第１検出器と、
前記第１検出器によって検出されたアナログの信号からデジタルの前記第１干渉信号を生成して出力する第１ＡＤ変換器とを備え、
前記第２チャンネルは、
干渉光を検出する第２検出器と、
前記第２検出器によって検出されたアナログの信号からデジタルの前記第２干渉信号を生成して出力する第２ＡＤ変換器とを備えることを特徴とする光コヒーレンストモグラフィ装置。 The optical coherence tomography device of claim 1,
The first channel is
A first detector for detecting interference light;
A first AD converter that generates and outputs the digital first interference signal from the analog signal detected by the first detector;
The second channel is
A second detector for detecting interference light;
An optical coherence tomography apparatus comprising: a second AD converter that generates and outputs the digital second interference signal from the analog signal detected by the second detector.
前記帯域ずれは、
前記第１検出器と前記第２検出器の間の個体差、
前記第１ＡＤ変換器および前記第２ＡＤ変換器の各々から前記制御部が干渉信号を入力するタイミングの差、および、
前記第１検出器が検出する干渉光の光路長と、前記第２検出器が検出する干渉光の光路長の差、
の少なくともいずれかに起因する波長帯域のずれであることを特徴とする光コヒーレンストモグラフィ装置。 An optical coherence tomography device according to claim 2,
The band shift is
An individual difference between the first detector and the second detector;
A timing difference at which the control unit inputs an interference signal from each of the first AD converter and the second AD converter; and
A difference between an optical path length of the interference light detected by the first detector and an optical path length of the interference light detected by the second detector;
An optical coherence tomography apparatus characterized by a shift in wavelength band caused by at least one of the above.
前記分割光学系で分割されて前記第１チャンネルに向かう干渉光と、前記分割光学系で分割されて前記第２チャンネルに向かう干渉光の位相差が、前記分割光学系によって所定値に定まると共に、
前記制御部は、
入力した前記第１干渉信号および前記第２干渉信号における位相差を前記所定値に調整することで、前記帯域ずれを補償することを特徴とする光コヒーレンストモグラフィ装置。 An optical coherence tomography device according to any one of claims 1 to 3,
The phase difference between the interference light divided by the division optical system and directed to the first channel and the interference light divided by the division optical system and directed to the second channel is determined by the division optical system to a predetermined value,
The controller is
An optical coherence tomography apparatus that compensates for the band shift by adjusting a phase difference between the input first interference signal and the second interference signal to the predetermined value.
前記光コヒーレンストモグラフィ装置は、
測定光源と、
前記測定光源から出射された測定光と参照光が合成された干渉光を、複数の干渉光に分割する分割光学系と、
前記分割光学系によって分割された複数の干渉光のうち、１つまたは複数の干渉光を検出して第１干渉信号を出力する第１チャンネルと、
前記分割光学系によって分割された複数の干渉光のうち、前記第１チャンネルによって検出される干渉光とは異なる１つまたは複数の干渉光を検出して第２干渉信号を出力する第２チャンネルと、
を備え、
前記処理装置のプロセッサが前記干渉信号処理プログラムを実行することで、
前記第１チャンネルと前記第２チャンネルの間の特性差に起因する、前記第１干渉信号と前記第２干渉信号の間の波長帯域のずれである帯域ずれを補償して、前記内部情報を取得する処理ステップを前記処理装置に実行させることを特徴とする干渉信号処理プログラム。
An interference signal processing program executed in a processing device that acquires internal information of a test object by processing an interference signal acquired by an optical coherence tomography device,
The optical coherence tomography apparatus is
A measurement light source;
A splitting optical system that splits interference light obtained by combining measurement light and reference light emitted from the measurement light source into a plurality of interference light;
A first channel that detects one or a plurality of interference lights among the plurality of interference lights divided by the division optical system and outputs a first interference signal;
A second channel that detects one or a plurality of interference lights different from the interference light detected by the first channel among the plurality of interference lights divided by the division optical system and outputs a second interference signal; ,
With
When the processor of the processing device executes the interference signal processing program,
The internal information is acquired by compensating for a band shift, which is a wavelength band shift between the first interference signal and the second interference signal, caused by a characteristic difference between the first channel and the second channel. An interference signal processing program that causes the processing device to execute a processing step of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015233996A JP6601189B2 (en) | 2015-11-30 | 2015-11-30 | Optical coherence tomography apparatus and interference signal processing program |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015233996A JP6601189B2 (en) | 2015-11-30 | 2015-11-30 | Optical coherence tomography apparatus and interference signal processing program |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2017101973A JP2017101973A (en) | 2017-06-08 |
| JP2017101973A5 true JP2017101973A5 (en) | 2018-12-13 |
| JP6601189B2 JP6601189B2 (en) | 2019-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015233996A Active JP6601189B2 (en) | 2015-11-30 | 2015-11-30 | Optical coherence tomography apparatus and interference signal processing program |
Country Status (1)
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| JP (1) | JP6601189B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7260426B2 (en) | 2019-07-11 | 2023-04-18 | 株式会社トプコン | Optical coherence tomography device, control method thereof, optical measurement method, program, and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3325061B2 (en) * | 1992-11-30 | 2002-09-17 | オリンパス光学工業株式会社 | Optical tomographic imaging system |
| US6927860B2 (en) * | 2003-05-19 | 2005-08-09 | Oti Ophthalmic Technologies Inc. | Optical mapping apparatus with optimized OCT configuration |
| JP2005245740A (en) * | 2004-03-04 | 2005-09-15 | Clinical Supply:Kk | Time gate optical wave tomogram measuring method and device |
| JP2007114160A (en) * | 2005-10-24 | 2007-05-10 | Sumitomo Electric Ind Ltd | Optical coherence tomography system |
| JP5903903B2 (en) * | 2012-01-19 | 2016-04-13 | 株式会社ニデック | Optical coherence tomography system |
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