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F-ST***0 modulation experiment Feartures of the instruments : θ modulation technique is a clever application of Abbe imaging theory it will transfer the orginal image into grating modulation image distributed at a certain angle insert the modulation image into the potical and pursue appropriate spatial flitering treatment with white light illumination to achieve pseedo-color coding and then color output image is obtained , commplete set of equipment optical experiment guide light source,lens fourier lens θ films,the spectrum holder ,frosted glass and so on ,