A prototype of optical proximity sensor based on RORS. - Akira Kurahashi; M. Adachi; Masanori Idesawa (J. Field Robotics, 1986)

Prototypes of New Type Image Position Detection Element. - Chiyoharu Horiguchi; Akira Kurahashi; Masanori Idesawa (J. Robotics Mechatronics, 1989)