Ohta Kazuya
Okahira Hiroyuki
Okamura Takehiko
Okamuro Takuma
Okanishi Mamoru
Okutsu Kazuhisa
Omura Fumihiko
Onuki Katsunori
Oosakaya Takayoshi
Ootake Yuuji
Optical Physics Company
Optical Radiation Corporation
Optiques et Microsystems SA
Osawa Hiroshi
Ota Kazuya