Fig. 1. Relationship between vector height and diameter for planar element

Fig. 2. Dispersion curve for TiO₂ films

Fig. 3. Simulated transmittance curve of single sided bandpass filter film

Fig. 4. Surface shape of HWB900 substrate

Fig. 5. Test results of transmittance of single-sided bandpass filter film

Fig. 6. Surface shape of sample after depositing single-sided bandpass filter film

Fig. 7. Test results of surface shape of sample after matching stress/deformation film on back

Fig. 8. Transmittance curve of verified membrane system design

Fig. 9. Test results of surface shape of bandpass filter prepared by double-sided coating