| Zugriffsnummer | 32033 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Variable, computer-controlled attenuator for use in a time-gated optical scanning system |
| Autor(in); Institution |
Fuchs, Katja; 8.3, Biomedizinische Optik, PTB-Berlin; Universität zu Lübeck, GERMANY
Wabnitz, Heidrun; 8.3, Biomedizinische Optik, PTB-Berlin
|
| Quelle/Jahr | Proceedings Student Conference 2014 Medical Engineering Science:(2014), 4 S. |
| Herausgeber(in) |
Buzug, T.M.; Universität zu Lübeck, GERMANY
Birngruber, R.; Universität zu Lübeck, GERMANY
Botterweck, H.; Universität zu Lübeck, GERMANY
Brinkmann, R; Universität zu Lübeck, GERMANY
Gehring, H.; Universität zu Lübeck, GERMANY
et al.
|
| ISBN | 978-3-656-59650-9 (Buch) ; 978-3-656-59648-6 (E-Book) |
| URL | |
| Verlag | München: GRIN Verlag GmbH |
| Konferenzangaben | Student Conference Medical Engineering Science 2014, Lübeck, 12-14, March, 2014, Germany |
| Freie Schlagworte | variable optical attenuator ; non-contact imaging ; temporal instrument response function ; time-correlated single photon counting |
| Zusammenfassung | In this work a continuously variable and computer-controlled optical attenuator was designed and tested. The attenuator has a wide dynamic range of four orders of magnitude of light intensity. Such filter is required to measure the instrumental response function (IRF) of a fast-gated detector in a time-resolved scanning system. The knowledge of the IRF is necessary for the analysis of a depth selected detection of functional brain activation. Furthermore, an optical setup was realized, consisting of a picosecond laser, the variable attenuator and a single-photon detector. The setup was used to measure characteristics like the count rate dependent timing stability and afterpulsing ratio for two detectors, a non-gated single-photon avalanche diode and a photomultiplier tube. |
