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

• Main Authors: EOM, JIN SEOB, PARK, SEUNG KWANG, KIM, HOON SUP
• Format: Patent
• Language: English; Korean
• Published: 28.10.2009
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

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.