发明专利
TW200608305A 於保密文件內製造繞射結構的方法 METHOD OF PRODUCING DIFFRACTIVE STRUCTURES IN SECURITY DOCUMENTS
审中-公开
基本信息:
- 专利标题： 於保密文件內製造繞射結構的方法 METHOD OF PRODUCING DIFFRACTIVE STRUCTURES IN SECURITY DOCUMENTS
- 专利标题（英）：Method of producing diffractive structures in security documents
- 专利标题（中）：于保密文档内制造绕射结构的方法 METHOD OF PRODUCING DIFFRACTIVE STRUCTURES IN SECURITY DOCUMENTS
- 申请号：TW094124111 申请日：2005-07-15
- 公开(公告)号：TW200608305A 公开(公告)日：2006-03-01
- 发明人： 尼米斯 周書亞R NEMETH, JOSHUA ROBERT , 保爾 蓋瑞F POWER, GARY FAIRLESS
- 申请人： 塞古倫希股份有限公司 SECURENCY PTY LIMITED
- 申请人地址： 澳洲
- 专利权人： 塞古倫希股份有限公司 SECURENCY PTY LIMITED
- 当前专利权人： 塞古倫希股份有限公司 SECURENCY PTY LIMITED
- 当前专利权人地址： 澳洲
- 代理人： 惲軼群; 陳文郎
- 优先权： 澳大利亞 2004903948 20040716
- 主分类号： G06K
- IPC分类号： G06K
A method of producing a security document or article including a substrate, which is transparent at least to visible light, and a diffractive optical microstructure. The method includes applying an opacifying layer to at least one surface of the transparent substrate. An area of the opacifying layer is exposed to laser radiation to ablate apertures in selected portions of the opacifying layer, thereby forming a diffractive optical microstructure on the surface of the substrate. The laser radiation may be patterned prior to exposing the opacifying layer, for example by passing the radiation through a mask. Alternatively, a focussed or collimated laser beam may be directed onto the selected portions of the opacifying layer. Laser radiation may be directed onto the opacifying layer either directly, or through the transparent substrate. Security documents or articles made in accordance with the method are also provided.