| 摘要 |
PURPOSE:To enable convergent propagation of an optical signal in each ring and to realize optical transmission with good efficiency by forming eccentrically both photoconductive rings. CONSTITUTION:The optical signal inputted from the 1st juncture 5 to the 1st input and output end 32 is propagated while said optical signal is reflected by the outside surface of a ring part 33. The outside circumferential surface of the ring 1 is formed on tapered surfaces 45, 46 and play the role of a mirror and therefore the quantity of the light released from the outside circumference to the outside is decreased. Since the outside circumference and inside circumference of the ring 1 are made eccentric, the optical signal is converged and propagated while the incident angle to the inside circumferential surface 1a is gradually decreased toward the narrow width part of the ring 1. The optical signal made incident at the critical angle or below to the surface 1a is conducted through the surface 3a to the inside of the 2nd photoconductive ring 3. The outside circumference and the inside circumference are made eccentric in the ring 3 as well similarly to the ring 1 and the tapered surfaces 49, 50 play the role of a mirror and therefore the optical signal is efficiently conducted to the 2nd input and output end 36 and is taken out through the 2nd juncture 6. |
