Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2006-11-21
2006-11-21
Amari, Alessandro (Department: 2872)
Optical: systems and elements
Diffraction
From grating
Reexamination Certificate
active
07139127
ABSTRACT:
A diffractive optical element contains a multiplicity of binary blazed diffraction structures, which substantially extend mutually parallel in a longitudinal direction. Perpendicularly to the longitudinal direction, the diffraction structures have a width g which is greater than the effective wavelength of electromagnetic radiation for which the diffractive optical element is designed. The diffraction structures respectively comprise a series of individual substructures, which produce a blaze effect and have a maximum extent p in the longitudinal direction which is less than the effective wavelength of the electromagnetic radiation, at least on average over a diffraction structure. In a plan view, the individual substructures respectively have the shape of a closed geometrical surface, which has an extent parallel to the longitudinal direction that varies perpendicularly to the longitudinal direction. Perpendicularly to the longitudinal direction, the surface has a maximum extent which is greater than the effective wavelength.
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Arnold Ralf
Kleemann Bernd
Amari Alessandro
Carl Zeiss AG
Young & Basile P.C.
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