Micro-optical elements such as lenses and wave-guides are manufactured by printing a hardenable optical fluid using digitally driven ink-jet technology. An array of micro-optical elements are precisely positioned in an electroformed substrate having a surface containing structural openings which serve...http://www.google.de/patents/US6805902?utm_source=gb-gplus-sharePatent US6805902 - Precision micro-optical elements and the method of making precision micro-optical elements
