Studies on aperture synthesis in digital Fresnel holography
Aperture synthesis can improve image resolution in digital holography by increasing the numerical aperture of the system. In this paper, we show that both the lateral resolution and image field of view can be enhanced at the same time using a more general Fresnel holography setup and hologram stitch...
| Auteurs principaux: | , |
|---|---|
| Autres auteurs: | |
| Format: | Journal Article |
| Langue: | English |
| Publié: |
2013
|
| Sujets: | |
| Accès en ligne: | https://hdl.handle.net/10356/99609 http://hdl.handle.net/10220/13636 |
| _version_ | 1826121638886768640 |
|---|---|
| author | Hao, Yan Asundi, Anand Krishna |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Hao, Yan Asundi, Anand Krishna |
| author_sort | Hao, Yan |
| collection | NTU |
| description | Aperture synthesis can improve image resolution in digital holography by increasing the numerical aperture of the system. In this paper, we show that both the lateral resolution and image field of view can be enhanced at the same time using a more general Fresnel holography setup and hologram stitching. The impact of aperture synthesis on the lateral resolution is investigated both theoretically and experimentally. In the experiment, the synthesis is executed by moving the compact digital holographic system in two directions. Nine holograms are recorded and stitched into one hologram. The reconstruction results show that expanding aperture improves the lateral resolution. The lensless Fresnel holography used in this paper is demonstrated to have the ability to provide a larger numerical aperture and can compress the object spectrum in recording process. |
| first_indexed | 2024-10-01T05:35:29Z |
| format | Journal Article |
| id | ntu-10356/99609 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:35:29Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/996092020-03-07T13:22:19Z Studies on aperture synthesis in digital Fresnel holography Hao, Yan Asundi, Anand Krishna School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering Aperture synthesis can improve image resolution in digital holography by increasing the numerical aperture of the system. In this paper, we show that both the lateral resolution and image field of view can be enhanced at the same time using a more general Fresnel holography setup and hologram stitching. The impact of aperture synthesis on the lateral resolution is investigated both theoretically and experimentally. In the experiment, the synthesis is executed by moving the compact digital holographic system in two directions. Nine holograms are recorded and stitched into one hologram. The reconstruction results show that expanding aperture improves the lateral resolution. The lensless Fresnel holography used in this paper is demonstrated to have the ability to provide a larger numerical aperture and can compress the object spectrum in recording process. 2013-09-24T06:32:57Z 2019-12-06T20:09:29Z 2013-09-24T06:32:57Z 2019-12-06T20:09:29Z 2011 2011 Journal Article Hao, Y., & Asundi, A. K. (2011). Studies on aperture synthesis in digital Fresnel holography. Optics and lasers in engineering, 50(4), 556-562. https://hdl.handle.net/10356/99609 http://hdl.handle.net/10220/13636 10.1016/j.optlaseng.2011.09.007 en Optics and lasers in engineering |
| spellingShingle | DRNTU::Engineering::Mechanical engineering Hao, Yan Asundi, Anand Krishna Studies on aperture synthesis in digital Fresnel holography |
| title | Studies on aperture synthesis in digital Fresnel holography |
| title_full | Studies on aperture synthesis in digital Fresnel holography |
| title_fullStr | Studies on aperture synthesis in digital Fresnel holography |
| title_full_unstemmed | Studies on aperture synthesis in digital Fresnel holography |
| title_short | Studies on aperture synthesis in digital Fresnel holography |
| title_sort | studies on aperture synthesis in digital fresnel holography |
| topic | DRNTU::Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/99609 http://hdl.handle.net/10220/13636 |
| work_keys_str_mv | AT haoyan studiesonaperturesynthesisindigitalfresnelholography AT asundianandkrishna studiesonaperturesynthesisindigitalfresnelholography |