Open AccessNovel approach to optical profiler with gradient focal point methods
Author(s) -
Henzeh Leeghim,
MyoungKi Ahn,
Kwangsoo Kim
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.023061
Subject(s) - optics , lens (geology) , focal length , focal point , cardinal point , curvature , point (geometry) , physics , position (finance) , mathematics , geometry , finance , economics
Novel gradient focal point (GFP) methods by use of the gradient curvature cylindrical lens, the gradient thickness cylindrical lens and a tilted imaging sensor are proposed for the optical profiler. With the employed simple idea that the different divergence angle of an input beam to the lens generates the different focal position, the height information of one point can be obtained just in a single-shot by GFP approaches. The feasibility of the proposed system is demonstrated to be an alternative to optical profilers.