Based on the angle-tuned thin-film interference filter,a novel tuning optical filter with a wide tunable wavelength range is designed.By means of optimizing parameters of mechanism,the incident angle of the angle-tuned thin-film filter can be accurately controlled by a stepping motor.Through the stack of the multiple-cavity thin-film filter and its effective refraction index,the relationship between the central wavelength and the incident angle of the stepping motor is calculated theoretically.T...