| 摘要 |
<p>PURPOSE: To obtain a photovoltaic sensor in which stabilized temperature characteristics are ensured for the sensitivity of the sensor. CONSTITUTION: The photovoltaic sensor comprises a polarizer 3, a quarter wavelength plate 4, an electrooptic crystal 5, and an analyzer 6 arranged sequentially along an optical path. The electrooptic crystal 5 is composed of Bi12 GeO20 or Bi12 SiO20 and a relationshipκc =|(π/2)κ1/4|is set between the temperature coefficientκc of the electrooptic crystal 5 and thatκ1/4 of the quarter wavelength plate 4 by regulating the angle of rotation dependent on the thickness of the electrooptic crystal 5 and the cutting direction thereof.</p> |
