Fig. 1. Large-range high-precision step difference calculation based on channel spectrum

Fig. 2. Surface shape reconstruction of segmented detectors based on slope gradients. (a) Reconstruct surface figure. (b) Accuracy comparison of cross-section reconstruction. (c) Structure function comparison

Fig. 3. Multi-stage surface figure reconstruction analysis based on simulation. (a) Sampling figure in low-resolution reconstruction process. (b) Original surface figure in low-resolution reconstruction process. (c) Reconstructed surface figure by low-resolution reconstruction. (d) Sampling figure in low-resolution reconstruction process. (e) Original surface figure in low-resolution reconstruction process. (f) Reconstructed surface figure by low-resolution reconstruction. (g) Sampling figure in high-resolution reconstruction process. (h) Original surface figure in high-resolution reconstruction process. (i) Reconstructed surface figure by high-resolution reconstruction

Fig. 4. Detector architecture based on channel spectroscopy

Fig. 5. Photo of high-throughput segmented detectors measurement site

Fig. 6. Under interconnect architecture of optical fibre, original dispersive fringes and differential in two directions. (a) Original; (b) differential direction 1, and (c) differential direction 2

Fig. 7. Under interconnect architecture of optical fibre, original dispersive stripes and frequency domain signals in two directions. (a) Original; (b) differential direction 1, and (c) differential direction 2

Fig. 8. Frequency transformation under high-throughput testing with different step differences