Optical element, optical functional device, polarization...

Details Optical element, optical functional device, polarization... Optical element, optical functional device, polarization...

2005-09-20

2005-09-20

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S569000, C349S096000

Reexamination Certificate

active

06947215

ABSTRACT:
Optical elements have a plurality of periodic structures in which each period is smaller than the wavelength of usable light. Embodiments are provided in which a desired phase difference can be obtained at least at two wavelengths in a used wavelength region, in which periodic directions of a plurality of structures are perpendicular to each other, and in which the difference in refractive index between individual structures for a predetermined polarization component is set to a predetermined value or less.

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