As a supporting device for military weapons, a laser target designator (LTD) device is required to improve the precision of target tracking. Most LTD systems are equipped with a continuous (non-blinking) laser. A continuous-type laser is easily hijacked or confused by the enemies if the used LTD characteristics are known. Thus, it can affect the accuracy of target shooting. A blinking-type laser is then adopted and controlled by a laser shutter in order to strengthen laser initialization. The OPT 101 sensor is used as the receiver, which is equipped with a filter and collimator system. In this paper, the performance of blinking LTD with various laser wavelengths are observed, in which the intensity of the reflected laser power is measured based on the reflected medium. The effectiveness of the blinking LTD system against other laser interferences is also discussed.

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