Angle modulation experiment
 Features of the instrument:
Θ modulation technique is a clever application of Abbe imaging theory. It will transfer the original image into grating modulation image distributed at a certain angle. Insert the modulation image into the optical path and pursue appropriate spatial filtering treatment with white light illumination to achieve pseudo-color coding and, then, color output image is obtained.
 Complete set of equipment:
Optical experiment guide, light source, lens, Fourier lens, θ films, the spectrum holder, frosted glass and so on