NASA NTRS ยท 19750000105
Wide-field birefringent elements
Abstract
Birefrigent array consists of two plates with retardation properties nearly independent of direction of incident light over unlimited range of wavelengths. Array can be used as birefrigent color filter. Optical properties of plates may also be changed electro-optically rather than thermally.
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Miller, A.. 1975-06-01. Wide-field birefringent elements. https://ntrs.nasa.gov/citations/19750000105
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