| 摘要 |
When the tip of a radiation detection probe (2) is directed to a place to be measured, pointer light emitted from a light emission device (7) is projected to the place to be measured after sequentially passing through a transmission window (5C) of a radiation detection element (5) and a projection window (3E) of a probe cover (3). The place to be measured is clearly indicated as a bright point by the pointer light. Radiation from the place to be measured passes through the tip of the probe cover (3), collimated by a radiation introduction window (4A) of a side shield (4), and then enters in the radiation detection element (5). The amount of radiation is thus measured.
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