METHOD OF FORMING LASER RADIATION PLANE WAVE FOR LOCATING REMOTE OBJECTS AND DEVICE FOR EFFECTING THE METHOD Russian patent published in 1994 - IPC

FIELD: quantum radio physics. SUBSTANCE: device has a laser the radiation of which passes through a Polaroid, quarter-wave plate, telescope and is returned to the Polaroid by a selective mirror and is reflected by the Polaroid to wave front reversing mirror through a non-linear crystal and amplifier, a plane wave with polarization orthogonal to polarization of reflected radiation being passed through the non-linear crystal simultaneously with the reflected radiation. EFFECT: reduced phase distortions introduced by optic medium due to passing laser radiation through the optic medium three times, the third time at a frequency of second harmonic with reversed wave front. 2 cl, 2 dwg