A radiation detector is described having a semiconductor substrate with opposing front and rear surfaces, a cathode electrode located on the front surface of said semiconductor substrate, a plurality of anode electrodes located on the rear surface of said semiconductor substrate and a solder mask disposed above the anode electrodes. A sensor array with a further improved interference immunity against magnetic interference fields is thereby created. accounting purposes on company stock. A uniform color seen at one angle of rotation changes to another uniform color when the optical device is rotated in its own plane. In a disclosed embodiment of the shoe motion of the midtarsal joint is also limited by the supporting structure to aid in limiting subtalar joint motion and shoe rollover. The LPD silica layer can be further subjected to a nitrogen plasma treatment to enhance its thermal stability and anti-water penetration ability.