Fig. 1. Schematic diagram for solving the transmission equation of light intensity

Fig. 2. Basic schematic diagram of the system

Fig. 3. System composition block diagram

Fig. 4. Mechanical structure assembly drawing and physical drawing display

Fig. 5. Motor drive circuit wiring schematic diagram

Fig. 6. System interactive software GUI interface and basic flow chart. (a) GUI interface and module distribution; (b) software basic usage flow chart

Fig. 7. Display of field correction results

Fig. 8. System hardware and software joint image

Fig. 9. System resolution test. (a) Physical image of USAF-1951 resolution board; (b) resolution plate image under 10 and 20 times objective lens

Fig. 10. System phase recovery accuracy test. (a) The defocusing image and phase image of the phase recovery plate; (b) three-dimensional phase distribution; (c) a cross-section image cropped along the dotted line

Fig. 11. Phase diagrams and height distribution of Vero cell enzymatic process. (a) Two-dimensional phase distribution diagram; (b) three-dimensional height distribution

Fig. 12. Defocusing image, phase image and height distribution of flat glass(left 1: underfocus, left 2: overfocus, left 3: phase, right 1: height). (a) Scratch defect perspective 1; (b) scratch defect perspective 2