| 摘要 |
PURPOSE:To obtain a high multiplication factor and obtain a device applicable to the other photo arithmetic unit, etc. by connecting the fluorescent screen and the photoelectric screen of a photoelectric tube with an optical passage. CONSTITUTION:The radiated light at the (q) point of a fluorescent screen 3 excited by photoelectrons discharged by the incident light at the (p) point of a photoelectric screen 2 is arrested by the lower-end surface of an optical fiber 7a. It is then returned to the photoelectric screen adjacent to the P point of the photoelectric screen 2 via the optical fiber 7a to generate photoelectrons again. Optical fibers 7b, 7c-7n likewise return the radiated light of the fluorescent screen, and photoelectrons from the photoelectric screen 2 generated by the light from the optical fiber 7n are arrested by an anode 11 and extracted via an extracting line 11a. If a glass tube wall forming the photoelectric screen 2 and fluorescent screen 3 is made of fiber plate, a specific position on the opposite photoelectric screen 2 and fluorescent screen 3 can be correctly specified optically. |
