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专利名称：Doublet lens, variable apex angle prism and
deviation correction device
发明人：Osamu Kuno,Nobuchika Momochi申请号：US08/863042申请日：19970523公开号：US05909321A公开日：19990601
摘要：A doublet lens which, on being inserted between the light rays, can performdeviation correction in an afocal state without its focal length being changed. Thedoublet lens is arranged so that, if the radius of curvature of the concave surface of aplano-concave lens 10X is r1, the refractive index of the plano-concave lens 10X is n1, themagnitude of a gap between the plano-concave lens and the plano-convex lens is &Dgr; ,the refractive index of the gap is n2, the radius of curvature of the convex surface of aplano-convex lens 10Y is r2 and the refractive index of the plano-convex lens 10Y is n3,the following relation: ##EQU1## is met. The angle between opposite planar surfaces ischanged by rotating the plano-convex mirror, for example, of the doublet lens about itscenter of curvature as the center of rotation.
申请人：SONY CORPORATION
代理机构：Frommer Lawrence & Haug, LLP
代理人：William S. Frommer
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