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A new automatized device for high-precision measurements of optical retarder plates

This paper describes a new high-precision automatized device to measure simultaneously optical parameters of retarder plates, and linear dichroism and birefringence on any material exibing those effects (natural or induced). As a test, measurements were made on a quarter wave plate, and a study on the dependency of dichroism and birefringence versus magnetic field on a ferrofluid was undertaken.