| 摘要 |
<p>PURPOSE: To measure a magnetic field in the state that the relationship between the magnitude of the field and the output is linear and a phase angle is small by so providing that the relative main axis angle between polarizers and the Faraday rotary angle of a magneto-optic element satisfy a specific formula. CONSTITUTION: Specific formulae I and II areθ<= arccot (βhotanϕ) andθ>= arccot (αhotanϕ), where ho = rated magnetic field/(saturated magnetic field of magneto-optic element),βis an amount decided from according to an error and applied magnetic field/rated magnetic field. The a is represented byα= (2-C<2> +(4-7C<2> /2)<1/2> ]/2C<2> }<1/2> (C is a modulation factor). It is so set as to satisfy the formulae I and II. Then, the Faraday rotary angleθis regulated by regulating the thickness of a magneto-optic element 6, and the relative main axis anglesθof two polarizers 14, 15 are regulated by regulating the quarrying angle of polarizing glass for forming the polarizers 14, 15.</p> |
