LIDAR SYSTEM FOR REMOTE SENSING OF RADIOACTIVE MATERIALS USING INJECTION-SEEDED LASER

摘要

The present invention relates to a lidar apparatus for remotely sensing radioactive materials using an injection-seeded laser. The lidar apparatus comprises a resonance wavelength laser output device and a non-resonance wavelength laser output device. The resonance wavelength laser output device comprises: an injection-seeded laser which outputs resonance wavelength; a radioactive material filling cell where a radioactive material to be measured is filled by being mixed with air; a first beam divider where some parts of the laser outputted from the injection-seeded laser are outputted to a space to be measured and other part is directed to the radioactive material filling cell; a second beam divider which divides again the part of the laser divided by the first beam divider; a first light detector which detects lasers which do not pass a radioactive material filling space of the radioactive material filling cell among lasers passing the second beam divider; a second light detector which detects lasers passing the radioactive material filling space of the radioactive material filling cell among lasers passing the second beam divider; a signal ratio detector which detects by comparing the first light detector data with the second light detector data; and an injection-seeded laser control unit which controls the output of the injection-seeded laser so that the data by the signal ratio detector can remain within a set figure range. Therefore, the lidar apparatus prepared by the present invention can improve the accuracy in radioactive material detection and can be economical.