Diffractive optical element and also optical arrangement...

Details Diffractive optical element and also optical arrangement... Diffractive optical element and also optical arrangement...

2006-12-12

2006-12-12

Boutsikaris, Leonidas (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S566000, C359S569000, C359S571000

Reexamination Certificate

active

07149030

ABSTRACT:
A diffractive optical element has a plurality of diffraction structures for a certain wavelength. These each have a width measured in the plane of the diffractive optical element and a height measured perpendicularly thereto. The widths and the heights of the diffraction structures vary over the area of the diffractive optical element. An optical arrangement comprising such a diffractive optical element has, in addition, a neutral filter. The efficiency of such a diffractive optical element and of such an arrangement can be optimized locally for usable light.

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