Nikon Corporation

Essilor International (compagnie Generale D'optique)

Alain Goulet

Toru Fujii

Mathieu Feuillade

The invention concerns a transparent thin liquid crystal alignment film () including liquid crystals () within a polymerised liquid crystal composition, the film () comprising a first main surface (), a second main surface () and a bulk () comprised between said opposed two main surfaces (), for which: &#x22c5; in the vicinity of the first main surface (), the liquid crystals () are aligned along a main first direction, &#x22c5; in the vicinity of the second main surface (), the liquid crystals () are aligned along a main second direction, different from the first direction, and in between, the bulk () comprises liquid crystals () maintained in an isotropic orientation. The invention concerns also a process of manufacturing such a liquid crystal alignment film () and a polarization-independent spatial phase modulator including such a liquid crystal alignment film ().

Transparent thin film, process for manufacturing a film, and spatial phase modulator

A refractive Fresnel lens used for an optical system including an image plane, which includes a plurality of zone lens surfaces disposed concentrically and a plurality of side wall surfaces each formed between adjacent zone lens surfaces, is characterized in that the side wall surfaces are modulated so as to spatially spread in the image plane noise light due to reflection and/or refraction at the side wall surfaces.

Growing community of inventors

Tokyo, Japan

Alain Goulet