| 摘要 |
<p>In order to eliminate ''speckling'' in the reproduction of a holographic image using laser light, there is interposed between the source of the laser light and the hologram (12), a screen (16) comprising an array of microlenses, the screen (16) being subjected to small transverse movements in its own plane, during exposure of an imaging arrangement (14). The effect is to average out, over the exposure period, the effects of the ''defects'' in the optical system used in preparing the original hologram, and thereby to eliminate such speckling in the image formed in the imaging arrangement (14).</p> |
