> The team also used a CMOS camera to capture visible-light emissions from the microplasmas (...) The CMOS imagers, however, had to be placed close to the measured radiation source, reducing their applicability to remote sensing
How can it be called long-range detector, if literally the detector has to be placed at measured object?
The detector using the scattering of the infrared light emitted by the laser is long range.
They have used a second detection method with a CMOS camera that detected the fluorescence of the plasma produced by ionizing radiation.
The second short-range method was used for comparison with the investigated method, to assess its efficiency.