La description

● Understand the structure and principle of the 4f optical system. ●To add and subtract optical images using grating and to understand the physical meaning of the image addition and subtraction. ●Deepen the knowledge and understanding of Fourier optical spectrum filter. Complete set of equipment: ● Optical experiment guide, semiconductor laser, beam expander lens, collimating lens, Fourier lens, one-dimensional grating, object screen.