Raman spectroscopy equipment

Raman spectroscopy equipment comprising:

• a light source unit configured to generate excitation light;
• a first optical fiber configured to receive the excitation light from the light source unit and to transmit the excitation light;
• a light radiation unit configured to receive the excitation light from the first optical fiber;
• a target material located in the vicinity of the light radiation unit, the target material being configured to receive the excitation light from the light radiation unit and to generate first scattered light;
• a light focusing unit configured to concentrate the first scattered light in the vicinity of the target material and the light radiation unit and to change the first scattered light to second scattered light;
• a second optical fiber configured to receive the second scattered light from the light focusing unit and to transmit the second scattered light;
• and
• a spectroscopy unit configured to receive the second scattered light from the second optical fiber and to convert the second scattered light into an electrical signal, wherein
• the target material is transparent or semi-transparent to the excitation light and the first scattered light,
• the target material is exposed to the excitation light and the first scattered light along an optical path passing through the target material,
• the light radiation unit or the light focusing unit has a focus in the target material or on an outer circumferential surface of the target material,
• the light radiation unit comprises a first collimator lens, a band pass filter, and a light radiation lens,
• each of the first collimator lens and the light radiation lens has a convex lens shape,
• the first collimator lens and the light radiation lens are configured to receive the excitation light from the first optical fiber through the first collimator lens, to form the excitation light in parallel between the first collimator lens and the light radiation lens, and to radiate the excitation light to the target material through the light radiation lens,
• the band pass filter narrows a wavelength band of the excitation light, and
• the light radiation lens has a focus in the target material.