| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical material made of a novel cyclic conjugated diene resin and excellent in discoloration resistance at high temperatures; an optical product prepared by forming the optical material excellent in impact resistance, stability against heat distortion, and transparency-retaining properties in a pyrogenic environment; a lens as the optical product; and an optical product obtained by coating the above product with an inorganic thin film. <P>SOLUTION: The optical material at least contains (A) repeating units derived from a cyclic conjugated diene monomer and (B) repeating units derived from an aromatic vinyl monomer having a hydrogen atom at the α-position and has a random structure, provided at least a part of the main chain and side chains of the material have been hydrogenated. The optical product is made of the optical material. The lens is an example of the product. The optical product may be one coated with an inorganic thin film. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
