Patent ID: 11143386

Abstract:
The invention provides a collimator device for a lighting application which comprises a collimator panel having a first end face which receives input light and a second end face which provides collimated light. The second end face is opposite to the first end face. The collimator panel comprises a plurality of walls which extend between the first end face and the second end face to obtain a grid of cells. The cells extend between the first end face and the second end face to obtain the collimated light. At least the plurality of the walls are arranged to obtain cross-sections of the associated cells which form an auxetic structure. The collimator panel is deformable from a first structure into a second structure by changing the cross-section of the associated cells to change the collimated light from a first spatial distribution into collimated light having a second spatial distribution. The first spatial distribution is different from the second spatial distribution.