[20p-C31-1~6] 3.7 Optical measurement, instrumentation, and sensor

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[20p-C31-3] Design of LIDAR system for remote detection of hazardous substances

〇Shuzo Etoh¹, Takayuki Higo¹, Yuji Oishi¹ (1.CRIEPI)

Keywords:

LIDAR,Raman spectroscopy,Telescope

One method for remotely measuring flammable or toxic substances that are difficult for humans to approach involves combining LIDAR and Raman spectroscopy. Raman spectroscopy can identify a wide variety of substances, but the intensity of Raman-scattered light is generally very low. However, in the deep ultraviolet (DUV) wavelength region, its intensity may be significantly increased due to resonance effects. We have focused on the resonance Raman effect and developed an optical system for Raman spectroscopy with high throughput in the DUV wavelength region. In this system, the optical system for focusing laser light and the optical system for collecting Raman-scattered light were prepared separately. Alternatively, if these two functions can be incorporated into one optical system, the field of view of the laser light and the field of view of the optical system that collects the scattered light can be overlapped to a larger extent, potentially allowing for Raman spectra to be measured with higher sensitivity. In this report, we describe the design results of such an optical system.