Fig. 1. Spectrum of ZnSe substrate

Fig. 2. Refractive index dispersion distribution of thin film materials

Fig. 3. Design spectrum of reduced reflection film

Fig. 4. Optimization goals

Fig. 5. Design spectrum of spectroscopic film

Fig. 6. Membrane thickness error analysis

Fig. 7. Design spectrum of beam splitter

Fig. 8. Test spectrum of spectroscopic film

Fig. 9. Final experimental results

Fig. 10. Environmental test results