| 摘要 |
FIELD: holograms and diffraction gratings in which the presence of the "key color" ("Magenta") makes it possible for the viewer to determine the position, in which all other colors of the hologram can be well defined. SUBSTANCE: provision is made for two sets of spectra (60 and 70) so that at a definite angle (13) the reference beam of incident white light (10), illuminating the composition of the hologram or diffraction grating, makes it possible for the viewer (11) to see the "Magenta" color to be used as the "key color". EFFECT: enhanced efficiency. 5 dwg |
