Wavelength-scanning digital interference holography for tomographic three-dimensional imaging by use of the angular spectrum method

• Published in: Optics letters Vol. 30; no. 16; p. 2092
• Main Authors: Yu, Lingfeng, Kim, Myung K
• Format: Journal Article
• Language: English
• Published: United States 15.08.2005
• Subjects: Algorithms; Equipment Design; Equipment Failure Analysis; Holography - instrumentation; Holography - methods; Imaging, Three-Dimensional - instrumentation; Imaging, Three-Dimensional - methods; Microscopy, Interference - instrumentation; Microscopy, Interference - methods; Radiotherapy, Conformal - instrumentation; Radiotherapy, Conformal - methods; Signal Processing, Computer-Assisted - instrumentation; Spectrum Analysis - instrumentation; Spectrum Analysis - methods; Tomography, Optical - instrumentation; Tomography, Optical - methods
• ISSN: 0146-9592
• DOI: 10.1364/ol.30.002092

A tomographic imaging system based on wavelength-scanning digital interference holography is developed by applying the angular spectrum method. Compared to the well-known Fresnel diffraction formula, which is subject to a minimum distance requirement in reconstruction, the angular spectrum method can reconstruct the wave field at any distance from the hologram plane. The new system allows three-dimensional tomographic images to be extracted with an improved signal-to-noise ratio, a more flexible scanning range, and an easier specimen size selection. Experiments are performed to demonstrate the effectiveness of the method.