Polarization-selectively blazed, diffractive optical element

Details Polarization-selectively blazed, diffractive optical element Polarization-selectively blazed, diffractive optical element

2005-08-18

2008-08-05

Lavarias, Arnel C (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S575000, C359S574000, C359S486010, C359S494010

Reexamination Certificate

active

07408712

ABSTRACT:
A polarization-selectively blazed, diffractive optical element including multiple contiguous blaze structures extending along a given geometrical path. Each structure has a width perpendicular to direction of extension greater than the Wavelength of the electromagnetic radiation for which the element is designed. Each blaze structure multiple individual substructures arranged next to each other in the direction of extension according to a predetermined period. The substructures providing the blaze effect have the shape, when viewed from above, of a closed geometrical surface whose dimension parallel to the direction of extension varies perpendicular to the direction of extension, but is always smaller than the wavelength of the electromagnetic radiation, and whose maximum dimension perpendicular to the direction of extension is greater than the wavelength of the electromagnetic radiation. The filling ratio of the individual substructures in the direction of extension relative to the period is selected such that, as a function of the position perpendicular to the direction of extension, the blaze effect is optimized for one polarization condition.

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