Fig. 1. Dispersion characteristics of MODL

Fig. 2. Schematic diagram of interpolation calculation for optical path in light wave field

Fig. 3. Examples of calculating aspheric and diffractive surface combinations using various models. (a) Lens structure combining aspheric and diffractive surfaces; (b) Calculation results using TEA, Zemax, and the proposed ray-wave model, respectively

Fig. 4. Influence of HMOLD processing errors on PSF

Fig. 5. Impact of HMOLD processing errors on its imaging quality. (a) Ground truth image; (b) Simulated image of HMOLD without processing errors; (c) Simulated image of HMOLD with processing errors

Fig. 6. Structure of NAFNet image reconstruction network

Fig. 7. Variation of Strehl ratio with spectrum and focal length under initial structure of HMOLD

Fig. 8. End-to-end optimization framework for HMOLD dual-band computational imaging

Fig. 9. PSF, degraded images, and reconstructed images in visible band during training process

Fig. 10. PSF, degraded images, and reconstructed images in MWIR band during training process

Fig. 11. Simulation imaging results with optimal parameters

Fig. 12. Changes in Strehl ratio of optimized HMODL with wavelength and focal length

Fig. 13. Height profile of optimized HMODL. (a) Optimized profile of multi-order diffractive surface for HMODL; (b) Optimized and fitted profile of diffractive surface for HMODL

Fig. 14. Prototype of HMODL. (a) Fabricated HMODL; (b) Dual-band imaging system of HMODL

Fig. 15. Test optical path of HMODL prototype and PSF calibration results

Fig. 16. Imaging results of outdoor scenes

Fig. 17. Dual-band imaging results of prototype on specific frequency targets

Fig. 18. Imaging results of prototype on A1 resolution plate in visible band

Fig. 19. MTF of prototype under indoor conditions in both visible and infrared bands. (a) MTF curves of HMODL before and after reconstruction in visible band; (b) MTF curves of HMODL before and after reconstruction in MWIR band

Fig. 20. MTF tests of prototype at different fields of view outdoors. (a) Visible band checkerboard images taken by prototype outdoors and MTF curves before and after restoration at different fields of view; (b) MWIR band checkerboard images taken by prototype outdoors and MTF curves before and after restoration at different fields of view

Fig. 21. NETD of HMODL prototype