[D-7-5] Astigmatism of Ridge Stripe InGaAlP Laser Diodes Koichi NITTA、Kazuhiko ITAYA、Masayuki ISHIKAWA、Yukio WATANABE、Gen-ichi HATAKOSHI、Yukata UEMATSU (1.Research & Development Center, Toshiba Corporation) https://doi.org/10.7567/SSDM.1989.D-7-5