| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a plastic rod lens which has excellent heat resistance, sufficiently suppresses its thermal contraction even when used under a high-temperature environment, and reduces heat fluctuation in a conjugate length. <P>SOLUTION: A plastic rod lens is obtained by hardening an unhardened material containing a polymer (A) having a constitutional unit derived from α-methylstyrene and a radical polymerizable vinyl monomer (B). <P>COPYRIGHT: (C)2012,JPO&INPIT |
