US 7,580,193 B2
Plastic optical components and an optical unit using the same
Fumiyuki Suzuki, Tokyo (Japan); and Noriko Eiha, Kanagawa (Japan)
Assigned to FUJIFILM Corporation, Tokyo (Japan)
Filed on Aug. 31, 2005, as Appl. No. 11/214,815.
Claims priority of application No. 2004-255597 (JP), filed on Sep. 02, 2004.
Prior Publication US 2006/0056036 A1, Mar. 16, 2006
Int. Cl. G02B 3/00 (2006.01); G02B 9/00 (2006.01); G02C 7/04 (2006.01)
U.S. Cl. 359—642  [351/160 R; 351/166] 32 Claims
OG exemplary drawing
 
1. A plastic optical component, wherein an organic-inorganic hybrid layer obtained by a sol-gel process is formed as a moisture-proof coating at least on the surfaces of its body which are in contact with the outside air, wherein the moisture-proof coating further contains an inorganic coating and wherein the inorganic coating is based on at least one of inorganic materials selected from the group consisting of silicon nitride including Si3N4; a silicon oxynitride and silicon oxides represented by the formula SiOx (0<x≤2), the thickness of the organic-inorganic hybrid layer is in the range of 0.1-5 μm, the thickness of the inorganic coating is in the range of 10-1000 nm.