Ben-gurion University of the Negev Research and Development Authority

Teliswitch Solutions Ltd.

Moshe Gottlieb

Avner Safrani

Olga Iliashevsky

Yafa Yagen

The invention provides ultraviolet light absorber suitable for use as an additive in polymers, comprising particles of inorganic oxide having UV light-absorbing compound on their surface, wherein said UV light-absorbing compound is chemically bonded, either to a spacer provided on the surface of said particle, or directly to the surface of the particle. Process for preparing the additive absorber and a thermoplastic polymer (e.g., a film) comprising the absorber additive are also provided.

Additives for protection of polymers against ultraviolet light

An optical switch, comprising a plurality of light inputs and a plurality of light outputs. The switch additionally includes a polarization beam splitter, configured to split light beams received through the input carriers into separate first and second polarization components and a plurality of semi-transparent mirrors and polarization rotators arranged to allow controllable deflection of the first and second polarization components from the beam splitter to a selected one of the light outputs, wherein the one or more different planes defined for at least 15% of the semi-transparent mirrors by the possible paths of the first polarization component passing through the semi-transparent mirror in the arrangement do not coincide with planes defined by the possible paths of the second polarization component passing through any of the semi-transparent mirrors in the arrangement. A controller of the switch is adapted to control the beam rotators in order that the semi-transparent mirrors deflect beams from desired inputs to desired outputs.

Polarization-based optical switching

A mechanical fiber optic switch, which includes a base structure and a plurality of first optical fibers, mounted on the base structure. The first optical fibers are arranged such that their ends define a curved cylinder surface. The switch also includes a plurality of second optical fibers adapted to be optically coupled to selected ones of the first fibers. A movable control unit is adapted to move within the switch and to move both the first and the second optical fibers.

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Omer, Israel

Moshe Gottlieb