Abstract: The invention refers to a LED-based assembly (100) comprising: —an electrical device comprising circuit boards (110-1,110-2) arranged to drive and/or supply arrays of LEDs (111-1,111-2) electrically and mechanically connected thereto; —an optical device provided onto the electrical device and comprising optical boards (120) partly mounted onto the circuit boards (110-1,110-2).

Abstract: The invention relates to an optical device for imparting an asymmetrical light beam. The optical device comprises a lens (10) having an exit diopter (12) having an exit surface consisting of a convex surface (16) defining a curved rear portion (18) having a first curvature and a curved front portion (19) having a second curvature different from the first curvature. Furthermore the lens (10) comprises an entry diopter (11) including at least one concave lodging (13) for lodging at least one light source, the surface of the concave lodging (13) facing at least partly the curved rear portion (18).

Abstract: The invention refers to a LED-based assembly (100) comprising:—an electrical device comprising circuit boards (110-1,110-2) arranged to drive and/or supply arrays of LEDs (111-1,111-2) electrically and mechanically connected thereto;—an optical device provided onto the electrical device and comprising optical boards (120) partly mounted onto the circuit boards (110-1,110-2).

Abstract: The invention relates to an optical device for imparting an asymmetrical light beam. The optical device comprises a lens (10) having an exit diopter (12) having an exit surface consisting of a convex surface (16) defining a curved rear portion (18) having a first curvature and a curved front portion (19) having a second curvature different from the first curvature. Furthermore the lens (10) comprises an entry diopter (11) including at least one concave lodging (13) for lodging at least one light source, the surface of the concave lodging (13) facing at least partly the curved rear portion (18).

Abstract: A luminaire assembly (10; 20) comprising a support (11; 21) for receiving a light source (12; 22) a housing (13; 23) including a light exit portion (15; 25) disposed between a said light source (12; 22) and a target area to be illuminated and through which light from the said light source (12; 22) exits the housing (13; 23) a light intercepting element (161; 26) for preventing light from exiting the light exit portion (15; 25) along paths extending from the light exit portion (15; 25) in directions towards a region outside the target area. A luminaire including a luminaire assembly and a light source is also described.

Abstract: An optical waveguide sensing method and device in which a waveguide layer receives an optical signal and propagates the optical signal in accordance with a predetermined optical waveguide propagation mode. A testing medium surface in communication with the waveguide layer is responsive to a testing medium for modifying at least one characteristic of the propagated optical signal in relation to a given parameter of the testing medium. In this manner, the modified characteristic of the propagated optical signal can be measured in view of determining the given parameter of the testing medium.

Abstract: The present invention is concerned with a process for fabricating a buried optical waveguide, comprising providing a multi-layer piece of material having a waveguide core layer, generating a laser beam and producing by ablation at least two trenches by applying the laser beam onto the multi-layer piece of material. The two trenches extend through the multi-layer piece of material including the core layer. Upon the ablation, melted material from the multi-layer piece is produced and the core layer is encapsulated between the two trenches with the melted material to produce the buried optical waveguide in the multi-layer piece of material.

Abstract: An optical waveguide sensing method and device in which a waveguide layer receives an optical signal and propagates the optical signal in accordance with a predetermined optical waveguide propagation mode. A testing medium surface in communication with the waveguide layer is responsive to a testing medium for modifying at least one characteristic of the propagated optical signal in relation to a given parameter of the testing medium. In this manner, the modified characteristic of the propagated optical signal can be measured in view of determining the given parameter of the testing medium.

Abstract: A one step process for fabricating planar optical waveguides comprises using a laser to cut at least two channels in a substantially planar surface of a piece of dielectric material defining a waveguide there between. The shape and size of the resulting guide can be adjusting by selecting an appropriate combination of laser beam spatial profile, of its power and of the exposure time. A combination of heating and writing lasers can also be used to fabricate waveguides in a dielectric substrate, wherein the heating laser heats the substrate with a relatively broad focused spot, the power of the heating laser being controlled to raise the temperature heating the substrate just below the substrate's threshold temperature at which it begins to absorb electro-magnetic radiation, the writing laser, which yields a spot size smaller than the heating laser then melts the substrate within the focal spot of the heating laser.