| 摘要 |
PROBLEM TO BE SOLVED: To prevent uneven luminance caused by the structure of a prism center part, and also, to prevent an adhesion part from being peeled even in the case of molding a prism using a plastics material, as for the prism. SOLUTION: The incident surface of the prism is formed on a concave lens. Besides, on the exit surface of the prism a convex lens is formed. As for the constitution of the joint part of prism pieces, a dichroic multilayered film is formed on one surface side of the adhesion layer, and a single layer film is formed on the other surface side. |
