Patent ID: 7330240
Filing Date: 2008-02-12
Classification: G03B,G03F

Abstract:
1. An optical imaging system for selective thermal transfer of a material from a donor film to a substrate, the optical imaging system comprising: a light source capable of emitting a patterned light beam, the patterned light beam including two or more emitted light segments, each emitted light segment having a first uniformity along a first direction; a light homogenizer receiving the two or more emitted light segments from an input face of the light homogenizer, the light homogenizer homogenizing each emitted light segment and transmitting a corresponding homogenized light segment from an output face of the light homogenizer, each transmitted homogenized light segment having a second uniformity along the first direction, the second uniformity of each transmitted homogenized light segment being greater than the first uniformity of each corresponding emitted light segment; a first mask having at least twenty optically transmissive areas, each optically transmissive area having a length along the first direction that varies between first and second values and a height along a second direction, the first mask receiving and patterning each transmitted homogenized light segment into a row of at least twenty discrete light subsegments along the first direction; and a lens system projecting light patterned by the mask onto a transfer plane so as to form a projected array of discrete projected light segments in the transfer plane, such that when a donor film that includes a transferable material disposed proximate a carrier, is placed proximate a substrate that lies in the transfer plane, each of the discrete projected light segments is capable of inducing a transfer of the transferable material from the carrier onto the substrate.