| 摘要 |
<p>By providing a given thickness for a positive photoresist layer on a substrate which, if unexposed, after development has a maximum depth just equal to the sum of the individual depths of two, at least partly superimposed, rectungular relief-profile diffraction gratings in the developed photoresist layer, it is possible to make a single master recording, which can be used to provide a stamper for embossing two of the three primary colors in a single surface of a transparent plastic sheet in the fabrication of diffractive subtractive filters.</p> |
