Rubicon displays industry-leading, very large, defect-free sapphire crystal for use in the optical market for a wide range of industrial applications Rubicon Technology, Inc. (NASDAQ:RBCN), a leading provider of sapphire substrates and products to the LED, RFIC, semiconductor, and optical industries, today announced that it will be showing its line of sapphire optical products including sapphire ingots, windows and blanks at the SPIE Defense, Security, and Sensing conference in Baltimore, MD, April 23 - 27, 2012 in booth #545. Sapphire is ideal for hig...