INTERFEROMETER Russian patent published in 2002 - IPC

FIELD: spectral analysis. SUBSTANCE: proposed interferometer includes optically coupled source of luminous radiation, reflection mirror and periodic lattice structure positioned between source of luminous radiation and reflection mirror. Periodic lattice structure is formed by system of current- conducting electrodes deposited on or into thin ( less than λ/2) partially transmitting photoelectric layer. Two of these electrodes are interdigitated electrodes and third electrode is zigzag-shaped and embraces each of the two electrodes on three sides. Distance between first two interdigitated electrodes is equal to d/2, where d is found from formula sin θ = λ/2d, where θ is angle of plane of photoelectric layer with wave front of luminous radiation; λ is wave length of luminous radiation. EFFECT: raised measurement accuracy thanks to allowance for background radiation. 4 cl, 2 dwg