Fig. 1. TVM calibration light source system

Fig. 2. Experimental device for spectral simulation of TVM calibration light source

Fig. 3. Measured spectral distribution of short-arc xenon lamp, 2700 K color temperature blackbody, and 49 spectral simulation units

Fig. 4. Gaussian function fitting three kinds of skew spectrum simulation units. (a) Positive skew distribution; (b) normal distribution; (c) negative skew distribution

Fig. 5. Bigaussian function fitting three kinds of skew spectrum simulation units. (a) Positive skew distribution; (b) normal distribution; (c) negative skew distribution

Fig. 6. Asym2Sig and ECS functions fitting three kinds of skew spectrum simulation units. (a) Asym2Sig function fitting positive skew unit; (b) Asym2Sig function fitting normal unit; (c) Asym2Sig function fitting negative skew unit; (d) ECS function fitting positive skew unit; (e) ECS function fitting normal unit; (f) ECS function fitting negative skew unit

Fig. 7. Fitting results of simulation units

Fig. 8. Spectral simulation comparison of 2700 K color temperature blackbody. (a) Comparison of spectral simulation curves of 2700 K color temperature blackbody obtained using Gaussian function and three functions combination; (b) simulation error comparison

Fig. 9. Distribution of spectral units in digital micromirror

Fig. 10. Spectrum modification flow chart

Fig. 11. Comparison of local spectral simulation before and after experiment modifying

Fig. 12. Comparison of 2700 K color temperature spectrum simulation before and after experiment modifying. (a) Comparison of spectral simulation curves before and after modifying; (b) comparison of spectral simulation errors before and after modifying