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本实用新型提供一种在焦平面成像系统前面使用的双波段分离装置。该双波段分离装置是通过将两片不同波段的扇形滤光片装在一个圆盘上而制成的。工作时,该圆盘由无刷直流电机驱动,两片滤光片交替进入焦平面前面的光路中。成像系统以焦平面输出中的帧信号作为基准,控制电机的转速和相位,使两片滤光片进入光路的时间与帧信号保持严格的同步,将双波段分离。本装置适用于-20℃～+50℃温度范围。也能用于多波段分离。
The utility model provides a dual-band separation device used in front of a focal plane imaging system. The dual band splitter is fabricated by mounting two fan filters of different wavebands on a disk. In operation, the disk is driven by a brushless DC motor, with two filters alternately entering the light path in front of the focal plane. The imaging system uses the frame signal in the output of the focal plane as a reference to control the speed and phase of the motor so that the two filters enter the optical path in strict synchronization with the frame signal and separate the dual bands. This device is suitable for -20 ℃ ~ +50 ℃ temperature range. Can also be used for multi-band separation.