METHOD OF PRODUCING MIRROR HOLOGRAMS Russian patent published in 1996 - IPC

FIELD: applied holography; special holographic recording. SUBSTANCE: optical transmission element is placed onto flat mirror, as well as photographic plate, onto which bichromized gelatine layer is applied. Hologram is recorded by reference beam of coherent light being incident on normal line of plate at specific angle. Transmission hologram is used as transmission element. This hologram should be recorded preliminary by two beams of coherent light. One beam, i.e. reference one, is directed at α angle, being equal to angle of incidence of beam which records mirror hologram. And the other beam, i. e. signal one, is directed in perpendicular to plane of transmission hologram. Moreover, transmission hologram is glued onto flat mirror. EFFECT: improved quality. 4 dwg