DEVICE WHICH MEASURES TEMPORAL COHERENCE FUNCTION Russian patent published in 1997 - IPC

FIELD: optical interference meters. SUBSTANCE: laser radiation is separated by light separator 1 into reference and object beams. In addition device has pairs of parallel mirrors 4, 5 and 6, 7. Mirrors 5 and 7 have variable reflection index. Said pairs of mirrors pass light of equal intensity in each beam. Object and reference beams are collected by lenses 12 and 13 in non-linear medium 9 with altered delay level. Holograms which are stored in non-linear medium are read by beam which is reflected from mirror 10, runs through lens 13, is reflected by semitransparent mirror 8 and is converged by lens 14 into recording unit 11, which outputs temporal coherence function for one pulse. EFFECT: increased functional capabilities. 1 dwg