Fig. 1. Two simulated spectral signals. (a) Broad-band spectral curve; (b) narrow-band spectral curve

Fig. 2. Invalid data points of two simulated spectral signals. (a) Local magnification of broad-band spectrum interference fringe; (b) broad-band spectrum interference fringe; (c) local magnification of narrow-band spectrum interference fringe; (d) narrow-band spectrum interference fringe

Fig. 3. 15th-order corresponding signal after wavelet transform of interferometer signal. (a) Broad-band spectrum wavelet signal; (b) narrow-band spectrum wavelet signal

Fig. 4. Interference signal with missing sample point. (a) Complete signal; (b) locally amplified signal

Fig. 5. Recovery spectrum of interferometer signal with missing sample point

Fig. 6. 15th-order corresponding signal of interference signal with missing sample point after wavelet transform. (a) Complete signal; (b) locally amplified signal

Fig. 7. Recovery spectral information from revised interference signal. (a) Broad-band spectral curve; (b) narrow-band spectral curve

Fig. 8. Relative errors of recovery spectral signal from simulated interference signal. (a) Broad-band spectral error curve; (b) narrow-band spectral error curve

Fig. 9. Experimental system. (a) Principle of system; (b) complete experimental system; (c) interference module

Fig. 10. Interference signal captured by experimental system and recovery spectral signal. (a) Interference signal; (b) wavelet transform signal; (c) recovery spectral signal

Fig. 11. Relative errors of recovery spectral signal from experimental interference signal