| 摘要 |
A detector, comprising a housing with at least one window for allowing radiation to enter, at least one sensor (1,2) for sensing entered radiation, a unit for processing sensor signals, and mirrors that are shaped and mounted in the housing for reflecting onto the sensor radiation from outside detection zones better than radiation from elsewhere, wherein linked mirrors reflect radiation from a detection zone consecutively and each mirror in at least one linked pair is shaped and mounted in the housing so as to prevent it from reflecting radiation from another detection zone in sequence with other mirrors onto the sensor, thus optically isolating the pair from other mirrors. |
