| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical member that prevents cement used for a cemented lens from dissolving to deteriorate optical performance when forming an optical thin film by a wet type film formation method. <P>SOLUTION: An optical member 1 includes: a cemented lens 5 composed by cementing two lenses; an optical thin film 15 formed on a lens surface 6a that is the outer surface side of a convex lens 6 located at one end of the cemented lens 5 by a wet type film formation method; and a holding member 10 that is attached so as to hold the cemented lens 5 by being joined with the periphery of a concave lens 7 located at the other end of the cemented lens 5 and is integrally used with the cemented lens 5. The holding member 10 is cylindrically formed so as to surround the periphery of the concave lens 7. A boundary 8 between the concave lens 7 and the convex lens 6 on the outer peripheral surface of the cemented lens 5 is exposed outside. <P>COPYRIGHT: (C)2012,JPO&INPIT |
