Abstract
We demonstrate an optical method for edge contrast enhancement in light microscopy. The method is based on holographic Fourier plane filtering of the microscopic image with a spiral phase element (also called vortex phase or helical phase filter) displayed as an off-axis hologram at a computer controlled high resolution spatial light modulator (SLM) in the optical imaging pathway. The phase hologram imprints a helical phase term of the form exp(iφ) on the diffracted light field in its Fourier plane. In the image plane, this results in a strong and isotropic edge contrast enhancement for both amplitude and phase objects.
©2005 Optical Society of America
Full Article | PDF ArticleMore Like This
Stefan Bernet, Alexander Jesacher, Severin Fürhapter, Christian Maurer, and Monika Ritsch-Marte
Opt. Express 14(9) 3792-3805 (2006)
Ruth Steiger, Stefan Bernet, and Monika Ritsch-Marte
Opt. Express 21(14) 16282-16289 (2013)
Xiaodong Qiu, Fangshu Li, Wuhong Zhang, Zhihan Zhu, and Lixiang Chen
Optica 5(2) 208-212 (2018)