| 摘要 |
<p>A process is disclosed for producing holographic optical elements which operate at a multiplicity of wavelengths and which have reduced chromatic aberration. The achromatic holographic elements are fabricated using substantially conventional apparatus employing a technique based on the phenomenon that any two presynchronized wavelengths will be diffracted at the same angle if their construction angles are related to each other as the inverse of the ratio of their sines. In addition, in the case of holographic lenses, if the focal points during construction are related to each other as the inverse of the ratio of the sines of their construction angles, the diffracted wavelengths will be brought to a common focal point.</p> |
