A color imaging assembly for forming spatially separated, color component images of an object on a unitary image plane, comprising an imaging lens adapted for receiving a polychromatic imaging light beam from the object for imaging the object on the unitary image plane; a unitary multilayered beam splitter...http://www.google.com.tw/patents/US5040872?utm_source=gb-gplus-share專利 US5040872 - Beam splitter/combiner with path length compensator
