Title:
POLARIZATION DEPENDANT MULTI-FOCAL OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO2000026699
Kind Code:
A9
Abstract:
An optical element has a coating thereon to reflect energy, such as light, of a first polarization into a first focus zone and to allow energy, such as light, of a second polarization orthogonal to the first polarization, to reach a second optical element. The second optical element, which may be reflective, diffractive, holographic, aspherical or have other optical characteristics, acts upon the energy to focus it into a second focus zone. A polarization changing element can be placed between the energy source and the optical element or the polarization can be changed by rotating the energy source. The ability to position energy into different focus zones allows for high speed processing and for the generation of useful beam patterns, such as aiming beams.
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Inventors:
RUDEEN ROBERT W
Application Number:
PCT/US1999/026091
Publication Date:
October 19, 2000
Filing Date:
November 04, 1999
Export Citation:
Assignee:
PSC INC (US)
International Classes:
G02B3/10; G02B13/00; G02B13/18; G02B27/28; G06K7/10; G02B17/08; G06K7/12; (IPC1-7): G02B3/10; G02B17/08; G02B26/12; G02B27/28; G06K7/10
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