液晶素子と再帰性反射材を用いた空間光変調器　－水中光伝送システム用双方向伝送方式の検討 －

抄録

We made a spatial optical modulator using liquid crystal device and retro - reflective sheet in down - link direction for request signal. It can eliminate light sources in down - link and save power consumption . Extinction radio of more than 15dB was achieved over incident angle of ± 25 degree .