OPTICAL FILTER CONSISTING OF ACOUSTO-OPTIC TUNABLE FILTER AND NON-UNIFORM SPACE HOLE DISK

摘要

PURPOSE: An optical filter comprising acousto-optic tunable filter and a non-uniform space hole disk is provided to improve the speed of an image frame by enabling FFT for a sample value obtained without a rescaling procedure. CONSTITUTION: An acousto-optic tunable filter(110) adjusts a refractive angle of each wavelength of an incident light, and the light outputted from the acousto-optic tunable filter is incident to a slit(120). A diffraction grid(130) passes the light which passes through the slit, and the light diffracted by the diffraction grid is projected onto a lens. The light passing through the lens is incident to dove prism, and a mirror(170) is placed at the optical focus distance considering the dove prism. A disk(160) is placed between the dove prism and the mirror.