INTERFEROMETRIC METHOD OF IMAGE FORMING OF OBJECT OBSERVED THROUGH TURBULENT ATMOSPHERE Russian patent published in 1997 - IPC

FIELD: optical instrumentation engineering. SUBSTANCE: method includes filtration of received light flux and its division into two fluxes, as well as division of both fluxes into two beams of equal intensity. Interferrograms are formed by these fluxes, phase delay by π/2 being introduced in one of beams of second flux. Distribution of intensity of first and second interferrograms is recorded. Recorded interferograms are used for separation of object spatial spectrum, and object image is formed by the latter. First and second interferograms are formed with angle of turn of interfering beams equal to π. Formation of third and fourth interferograms is performed in the same way with angle of turn of interfering beams less than or equal to 2λ/QD, where λ - is wave length of filtered light flux; Q is object angular size; D is receiving aperture diameter. Phases of interferograms are separated and compared, and undistorted object phase is formed on the basis of comparison result. EFFECT: more accurate formation of image. 1 dwg