US Patent # 6,918,673
Granted July 19, 2005
Inventors: Robert L. Johnson, Natalia Gorawski, Barry O'Dwyer
A hermetic filter assembly which improves filter life and environmental stability. The elimination of optical epoxies in this air-spaced filter results in reduced auto-fluorescence, improved parallelism and flatness, and improved heat tolerance. 3rd Millennium filters were originally based on this technology- currently RapidBand filters are made with a similar technique.
US Patent # 5,646,781
Granted July 8, 1997
Inventor: Robert L. Johnson, Jr.
This patent for a triple-bandpass coating is significant for its image enhancement capability. This coating transmits bands of pure color while eliminating the regions of “color confusion” while viewing by eye. Major markets include backyard astronomy, binoculars, gun sights, etc. Omega's tradename for this design is Spectraplus.