| 摘要 |
PURPOSE:To obtain a reader with extremely high reading resolving power, by arranging poly Si having photoelectric effect in an array and providing electrodes by pinching each film. CONSTITUTION:The poly Si film 3 in approx. 5,000Angstrom -3mum is evaporated on a ceramic substrate 1 so as to lie over the pairs of electrodes 2A, 2B, and both ends of the electrode are forced out of both sides of the film 3 and covered with transparent protection film according to necessity. The film 3 is divided into a many film sections 3A consisting of units of regions each between the electrode 2A and 2B, and, when some of the film sections 3 are irradiated, the resistance value of the film 3A section greatly decreases. When a voltage is kept impressed across the film 3A, a photocurrent flows between the electrodes 2A, 2B on both sides of the film. The photocurrent is read by moving the array of the film 3A in a direction at right angle with the array and scanning it on the surface to be irradiated. The film 3A is formed in approx. 12mum and the reading resolving power can be extremely enhanced. Besides, when a long converging lens is provided on the surface, and each film 3A is projected, the sensitivity can be improved. |
