Photonics Research, 2014, 2 (2): 02000064, Published Online: Nov. 5, 2014
Enhanced depth resolution in optical scanning holography using a configurable pupil Download: 1042次
Abstract
The optical scanning holography (OSH) technique can capture all the three-dimensional volume information of an object in a hologram via a single raster scan. The digital hologram can then be processed to reconstruct individual sectional images of the object. In this paper, we present a scheme to reconstruct sectional images in OSH with enhanced depth resolution, where a spatial light modulator (SLM) is adopted as a configurable point pupil. By switching the SLM between two states, different Fresnel zone plates (FZPs) are generated based on the same optical system. With extra information provided by different FZPs, a depth resolution at 0.7 μm can be achieved.
Haiyan Ou, Ting-Chung Poon, Kenneth K. Y. Wong, Edmund Y. Lam. Enhanced depth resolution in optical scanning holography using a configurable pupil[J]. Photonics Research, 2014, 2(2): 02000064.