Modification of spatial domain algorithms for apertureless light propagation
Light propagation algorithms in the spatial domain hold an implicit assumption that the calculation region represents a virtual aperture, i.e., the amplitude outside of the calculation region is zero. With typically bright objects on a dark background, this assumption is legitimate and the calculati...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2017
|
| In: |
Applied optics
Year: 2016, Jahrgang: 56, Heft: 1, Pages: A8-A12 |
| ISSN: | 1559-128X |
| DOI: | 10.1364/AO.56.0000A8 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1364/AO.56.0000A8 Verlag, Volltext: https://www.osapublishing.org/ao/abstract.cfm?uri=ao-56-1-A8 
|
| Verfasserangaben: | K.-H. Brenner and S. Mehrabkhani |
| Zusammenfassung: | Light propagation algorithms in the spatial domain hold an implicit assumption that the calculation region represents a virtual aperture, i.e., the amplitude outside of the calculation region is zero. With typically bright objects on a dark background, this assumption is legitimate and the calculation is correct. With dark objects on a bright background, however, the assumption is violated and the calculation result is dominated by diffraction effects at a virtual aperture. This virtual aperture diffraction is especially a problem for pure phase elements, because the amplitude in and beyond the calculation region is a constant one. In this paper, we explain the background of the problem and present a general and effective method to remove this problem. |
|---|---|
| Beschreibung: | Published: October 11, 2016 Gesehen am 02.07.2018 |
| Beschreibung: | Online Resource |
| ISSN: | 1559-128X |
| DOI: | 10.1364/AO.56.0000A8 |