在制造暗闪光相机模型机时，费格斯用另外一种允许一些红外光线通过镜头，但不至于滤入太多红外光线，损坏相机传感器的滤光片代替传统滤光片。
When building his prototype, Fergus replaced this filter with another that lets some IR through the lens without flooding the camera's sensors.
多达几十种的准直器和滤光片的自由组合。
There are tens of combinations between the collimators and the filters.
针对双光电探测器比色系统设计了滤光片旋转系统；进行了温度测量实验。
Filter rotary device is designed for colorimetric system of double photoelectric detector and temperature-measuring experiment is conducted.
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