At a predetermined distance (a), the infrared detector "sees" a circular area that is called the visible surface (b).
在预定的距离(一)，红外探测器“看到”的圆形区域内被称为可见的表面(乙)。
In the light of the soft-ness of fibre bunch, the detector and refrigerator module can be placed at a distance from universal hold-er by optical fibre coupling technique.
利用纤维光束的柔软性，应用光纤耦合技术，可以让探测器和致冷器组件放在离万向支架一定距离上。
The responsivity over the sensitive area has a quadratic relation with distance to detector center within the main sensitive area.
在探测器的主要灵敏面内，相对响应度与到探测器中心的距离表现为二次曲面关系。
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