Fig. 1. System structure. (a) Schematic diagram; (b) simulation diagram

Fig. 2. Mechanical assembly drawing of the Raman spectrometer system

Fig. 3. Main distribution of stray light

Fig. 4. Ray tracing diagrams of Raman spectrometer system before adding the suppression structure. (a) 530 nm; (b) 710 nm; (c) 880 nm

Fig. 5. Schematic diagrams of optical trap parameter calculation. (a) Overall design of optical trap; (b) 90° angle optical trap; (c) non-90° angle optical trap

Fig. 6. Mechanical assembly drawing after adding the suppression structure

Fig. 7. Ray tracing diagrams of Raman spectrometer system after adding the suppression structure. (a) 530 nm; (b) 710 nm; (c) 880 nm

Fig. 8. Stray radiation ratios at different wavelengths

Fig. 9. Irradiance analysis of detector surface before and after adding the suppression structure at the central wavelength of 568 nm. (a) Before adding the suppression structure; (b) after adding the suppression structure