Reconfigurable zone plate lens

Details Reconfigurable zone plate lens Reconfigurable zone plate lens

2008-09-02

2008-09-02

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S565000, C349S201000

Reexamination Certificate

active

11314602

ABSTRACT:
A reconfigurable zone plate lens is disclosed. Some embodiments may include a central annular element having a first a first circumference centered about a central axis. Embodiments may also include a plurality of concentric annular elements of increasing circumference centered about the central axis and the central annular element, where each annular element is positioned around an annular element having a smaller circumference. The annular elements of some embodiments may each be adapted to be in either an active or inactive state where the active and inactive annular elements form a plurality of alternating active rings and inactive rings. Each active ring may include one or more annular elements in an active state and each inactive ring may include one or more annular elements in an inactive state. Each annular element may include one or more liquid crystal display (LCD) elements or micromirrors. Other embodiments are disclosed and claimed.

REFERENCES:
patent: 3861784 (1975-01-01), Torok
patent: 5151814 (1992-09-01), Grinberg et al.
patent: 5794023 (1998-08-01), Hobbs et al.
patent: 6903872 (2005-06-01), Schrader
patent: 7286292 (2007-10-01), Sagberg et al.
patent: 2003/0164922 (2003-09-01), Robins et al.

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