专利名称：Microsphere-based retroreflective articles
with enhanced retroreflective brightness
发明人：Clark G. Kuney, Jr.申请号：US07/358442申请日：190526公开号：US04957335A公开日：19900918
摘要：Microsphere-based retroreflective articles having exceptionally high
retroreflective brightness, particularly at divergence angles of up to 0. 5° may be madeby selection of microspheres having defined combinations of average diameter andaverage refractive index.
申请人：MINNESOTA MINING AND MANUFACTURING COMPANY
代理人：Donald M. Sell,Walter N. Kirn,Robert H. Jordan
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