ALEXANDRIA, Va., April 7 -- United States Patent no. 12,596,295, issued on April 7, was assigned to Electronic Theatre Controls Inc. (Middleton, Wis.).

"Range-based focus assistance for projection optics" was invented by Maxwell Schweiner (Middleton, Wis.), Evan Gnam (Madison, Wis.), Matthew Stoner (Middleton, Wis.) and Noah Meltzer (Middleton, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A lighting system capable of providing automated focus assistance for a moving lighting fixture thereof. In one example, a distance-measurement device connected to the moving lighting fixture operates to measure a distance to the projection surface and transmits the measurement to an electronic controller. The electr...