专利汇可以提供Recording in reversible, photochromic medium专利检索,专利查询,专利分析的服务。并且Interfering radiations of substantially coherent electromagnetic radiation of a wave length within a range to which a layer of photochromic material is sensitive are transmitted in different directions through a layer of the material in selected regions. The interfering radiations in each region produce antinodes which form peak energy levels to sensitize the photochromic material in spaced, parallel surfaces of a periodic structure having altered transmission and reflective properties. The sensitized regions constituting the recorded information may be read by radiation of a lower energy level or of a wave length outside the range of sensitivity directed to the regions, the reflected radiation being detected to represent the recorded information. A plurality of interfering beams may be transmitted in different directions in the same region to produce different recordings and may be detected by the same radiations. The photochromic material may be restored to its original state by radiation of a wave length in a third range, so that such radiation may be used to erase recording in any region.,下面是Recording in reversible, photochromic medium专利的具体信息内容。
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