Optical: systems and elements – Single channel simultaneously to or from plural channels – By refraction at beam splitting or combining surface
Reexamination Certificate
2007-05-22
2007-05-22
Thompson, Timothy (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By refraction at beam splitting or combining surface
C359S559000, C359S563000
Reexamination Certificate
active
10561861
ABSTRACT:
An optical diffraction element (1) comprises a diffraction layer (4) which is divided into diffraction strips (6) alternating with intermediate strips (8). The diffraction strips comprise nano-elements (10) which are aligned in one direction and absorb radiation (b) which is linearly polarized in this direction. The diffraction element may be a linear or two-dimensional grating (1) or a Fresnel lens (160). The polarization-sensitive grating can be used in optical systems in which only radiation with a specific polarization direction should be diffracted, or in an optical record carrier to allow reading of an information structure with high spatial frequencies.
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'T Hooft Gert Wim
Hendriks Robert Frans Maria
Kurt Ralph
Liedenbaum Coen Theodorus Hubertus Fransiscus
Belk Michael E.
Koninklijke Philips Electronics , N.V.
Thompson Timothy
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