Fig. 1. Optical path diagram of depolarizer in converging optical path

Fig. 2. Stokes vector of light rays at different positions of pupil. (a) I; (b) Q; (c) U

Fig. 3. Design flowchart of depolarizer in convergent optical path of spectrometer

Fig. 4. Schematic of depolarizer

Fig. 5. Polarization sensitivity of system varies with inclination angle. (a) Parallel beam incidence and (b) converging beam incidence for HV depolarizer; (c) parallel beam incidence and (d) converging beam incidence for improved depolarizer

Fig. 6. Polarization sensitivity of system varies with wavelength. (a) HV-type depolarizer incident with parallel beam; (b) improved depolarizer incident with convergent beam

Fig. 7. Image point split diagrams of system. (a) HV-type depolarizer incident with parallel beam; (b) improved depolarizer incident with convergent beam