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...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2017
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| In: |
Applied optics
Year: 2016, Volume: 56, Issue: 1, Pages: A8-A12 |
| ISSN: | 1559-128X |
| DOI: | 10.1364/AO.56.0000A8 |
| Online Access: | 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 
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| Author Notes: | K.-H. Brenner and S. Mehrabkhani |
| Summary: | 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. |
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| Item Description: | Published: October 11, 2016 Gesehen am 02.07.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1559-128X |
| DOI: | 10.1364/AO.56.0000A8 |