| 摘要 |
PROBLEM TO BE SOLVED: To provide a simpler method for manufacturing an open type translucent reflection base plate. SOLUTION: A microlens array (31) is formed on a whole face of such a semitransmissive base plate (3) as glass and a reflection film (33) is formed on the other face. The microlens array (31) is irradiated with a laser beam (54) and a fine hole (34) is formed in the reflection film (33). A convex lens, a 'Selfoc' lens, a lens of a distributed refractive index type, a Fresnel lens or a diffraction lens is usable in the microlens array. Thus, the open type semitransmissive reflection base plate (3) is available without the positioning process of the microlens array (31) and the fine hole (34), an etching process for forming the fine hole (34) or the like. |
