| 摘要 |
PURPOSE:To reduce the size and power consumption of the optical deflector by providing semiconductors of different conduction types connected in series so that an N type and a P type alternate and an optical material which varies in refractive index with temperature between a couple of heat conductive plates. CONSTITUTION:A series of semiconductors 4 of different conduction types and dielectric crystal which varies in refractive index with temperature, e.g. crystal 1 of lithium niobate are provided between the couple of ceramic plates 3. The semiconductors 4 are so connected in series that an N type and a P type alternate across a connection conductor. When a power source 5 flows a current to the semiconductors 4, one ceramic plate 3 generates heat according to the direction of the current and the other ceramic plate 3 absorbs the heat to generate a vertical temperature gradient in the crystal 1, thereby obtaining a refractive index gradient. A light beam A when is made incident from an end surface of the crystal 1 in parallel on the ceramic plates 3 is deflected because of the refractive index gradient. |
