| 摘要 |
PROBLEM TO BE SOLVED: To maintain optical effect and to reduce cost. SOLUTION: This optical block 8 is constituted by forming polyhedral prisms 1, 9, and 14 by sticking transparent base bodies 3, 11, and 16 on which reflection preventive films and dichroic mirrors are formed respectively on specific surface of glass-made optical members 2, 10, and 16 with adhesives and sticking the specific surface of the polyhedral prisms 1, 9, and 14 together. |
