Optical: systems and elements – Lens – With light limiting or controlling means
Reexamination Certificate
2008-04-29
2008-04-29
Thompson, Timothy (Department: 2873)
Optical: systems and elements
Lens
With light limiting or controlling means
C359S739000, C359S559000
Reexamination Certificate
active
11707271
ABSTRACT:
An imaging arrangement and method for extended the depth of focus are provided. The imaging arrangement comprises an imaging lens having a certain affective aperture, and an optical element associated with said imaging lens. The optical element is configured as a phase-affecting, non-diffractive optical element defining a spatially low frequency phase transition. The optical element and the imaging lens define a predetermined pattern formed by spaced-apart substantially optically transparent features of different optical properties. Position of at least one phase transition region of the optical element within the imaging lens plane is determined by at least a dimension of said affective aperture.
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Browdy and Neimark
Thompson Timothy
Xceed Imaging Ltd.
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