Ivon Franciscus Helwegen
Philips
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Publication
Featured researches published by Ivon Franciscus Helwegen.
Proceedings of SPIE, the International Society for Optical Engineering | 2007
Stein Kuiper; Jan Frederik Suijver; Szabolcs Deladi; Ivon Franciscus Helwegen
A 1.7× VGA zoom camera was designed based on two variable-focus liquid lenses and three plastic lenses. The strongly varying curvature of the liquid/liquid interface in the lens makes an achromatic design complicated. Special liquids with a rare combination of refractive index and Abbe number are required to prevent chromatic aberrations for all zoom levels and object positions. A set of acceptable liquids was obtained and used in a prototype that was constructed according to our design. First photos taken with the prototype show a proof of principle.
Archive | 2005
Christina Adriana Renders; Stein Kuiper; Ivon Franciscus Helwegen; Marco Van As
Archive | 2005
Albert Hendrik Jan Immink; Stein Kuiper; Ivon Franciscus Helwegen; Marco Van As
Archive | 2007
Ivon Franciscus Helwegen; Stein Kuiper
Archive | 2007
Ivon Franciscus Helwegen; Hans Willem Van Kesteren
Archive | 2007
Hans Willem Van Kesteren; Ivon Franciscus Helwegen; Jeroen Kalkman
Archive | 2006
Bart Michiel De Boer; Ivon Franciscus Helwegen
Archive | 2005
Ivon Franciscus Helwegen
Archive | 2005
Ivon Franciscus Helwegen; Stein Kuiper; Robert W. J. Zijlstra
Archive | 2005
Ivon Franciscus Helwegen; Stein Kuiper
