全可視光領域対応型自動位相差測定機の試作

抄録

The quarter wave plate in the Senarmont's compensator satisfies only for a monochromatic light. And the retardation in a test piece is obtained by the Senarmont's compensator as the fraction of total fringe order. In order to resolve this problem, the composite quarter wave plate has been developed. A trial equipment of automatic retardation tester is made up with the composite quarter wave plate in accordance with Senarmont's compensator. Complicated calcuration and setting of the azimuth angles of each plates is made automatically by a computer and steppingmotors. And the measurement of the retardation in a test piece is also carried out easily by it. Using this equipment, the absolute retardation in the test piece can be also obtained easily and precisely for each wave length.