| 摘要 |
PROBLEM TO BE SOLVED: To function plural diagonally vapor deposited films as a wavelength plate in a wide band of visible rays by laminating these films and utilizing the formability of a phase difference and to ameliorate the peeling at an adjacent boundary by the internal stress of the films themselves generated by the thickness increase accompanying the same. SOLUTION: Dielectric materials are deposited by evaporation on a solid substrate 23 from a direction diagonal with the normal 26 of the substrate surface 23, by which the diagonally vapor deposited films 21, 22 are formed. The diagonally vapor deposited films 21, 22 are formed on the opposite two surfaces of the solid substrate 23 and are manufactured by using the material exhibiting high wavelength dispersion and the material exhibiting low wavelength dispersion in the phase difference respectively, forming the double refractive films 24, 25 dividedly on the opposite two surfaces of the solid substrate 23 and intersecting the vapor deposition directions of the dielectric materials of the respective layers with the solid substrate 23 orthogonally with each other in such a manner that the lagging axes of the double refractive films 24, 25 intersect orthogonally with each other. |
