Generating an adjustable three-dimensional dark focus.
Conditions for generating a dark focus surrounded by light in all three dimensions are presented. A simple technique for generating such a dark region is demonstrated experimentally. The method is compared with previous attempts at creating a three-dimensional dark focus.
Yelin
Dvir
D
Harvard Medical School and the Wellman Center for Photomedicine, Massachusetts General Hospital, 55 Fruit Street, BAR 703, Boston, Massachusetts 02114, USA. dyelin@partners.org
Bouma
Brett E
BE
Tearney
Guillermo J
GJ