| abstract |
【Task】 Without deteriorating moldability, heat resistance, mechanical strength, and low birefringence, it does not easily deteriorate even when used with laser light in the near-ultraviolet region, has very little change in optical performance during use, and has a particularly high light transmittance. Use of a resin composition suitable for an optical element, an optical element obtained by molding the resin composition, and an optical element that can be maintained, and that foreign matter hardly adheres to the surface of a molded body such as an optical element. Provided optical pickup device. [Solution] A thermoplastic resin composition containing two specific types of light stabilizers in a specific mass ratio among a polymer having a specific structure and a hindered amine light stabilizer having a molecular weight of 400 to 5000, and molding the resin composition And an optical pickup device using the optical element. [Selection figure] None |