BIREFRINGENT OPTICAL ELEMENTS HAVING REVERSE DISPERSION

摘要

This invention relates to an optical element comprising a first component having a birefringence dispersion of D1> 1, and a second component having a birefringence dispersion of D2> 1 and a maximum peak absorption at a wavelength less than 400 nm, wherein the birefringence ratio at any wavelength of the first and second component is ? n1 /? n2 < 0, and wherein the optical element has a reverse birefringence dispersion of D<1.