HOLOGRAM, LIGHT TRANSMITTING REFLECTIVE PLATE, SCREEN, AND PROJECTION SYSTEM

摘要

[Problem] To provide a hologram, a light transmitting reflective plate, a screen, and a projection system which achieve high transparency and allow a projected image to be brightly and clearly reflected and observed. [Solution] A hologram (1) is characterized by having recessed and protruding parts, reflecting prescribed white light incident at a prescribed angle from one side and transmitting prescribed white light incident at a prescribed angle from the other side, and is characterized in that the diffraction efficiency for the transmitted light differs from the diffraction efficiency for the reflected light.