Abstract
The range of linear response of differential prisms is investigated. This range can be increased quite considerably by coupling simple prisms parallel or in series. By choosing the most favorable conditions, such compound prisms can be given a linear range equal to and greater than the refractivity difference between glass and water. This should have practical significance since solid glass prisms are more easily constructed than hollow prisms for a reference liquid.
© 1954 Optical Society of America
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