| 摘要 |
PURPOSE:To improve the sensitivity and the characteristic of counting rate, by dividing a field of vision and preparing for the simultaneous incidence of radiant rays. CONSTITUTION:A photoelectric detector 12 is divided into group A and group B. Position computing circuits 13a, 13b and energy discrimination circuits 14a, 14b are provide in each group. Each position signal of the circuits 13a, 13b is made delayed by delaying circuits 16a, 16b. A position signal X is compared with a standard voltage by comparators 17a, 17b and the position of incidence is discriminated whether right half or left half of visual field and an analogue gate 18a or 18b is shut in accordance with this position and then, the position signal delayed by the circuits 16a, 16b is sent to a multiplexer 21 through analogue buffers 19a, 19b. The analogue buffers 19a, 19b and the multiplexer 21 are controlled by a controlling circuit 20. The output of the multiplexer 21 is sent to a CRT indicating device 15. |
