| 摘要 |
<p>A holographic device which has first (3) and second (4) roughly coplanar and superposed holograms, which are illuminated by the same nonpolarized light beam (A) with at least first and second spectral compositions, said holograms each being recorded in a manner such that in its middle, the axis of the diffracted beam is perpendicular to the direction of the incident beam in this medium, said diffracted beams (B, C) forming first and second angularly separated light beams with the same polarization, and having different spectral compositions. Application to a projector of video images displayed on a matrix screen of liquid crystal cells.</p> |
