Cube-corner retroreflective articles having tailored divergence profiles
US4775219A · kind A · utility
295Cited by
8References
79Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 21, 1986 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Nov 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/124
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Cube-corner retroreflective article having improved divergence profiles. The three lateral reflecting faces of the cube-corner retroreflective elements are formed by three intersecting sets of parallel V-shaped grooves, and at least one of the sets includes, in a repeating pattern, at least two groove side angles that differ from one another. Thereby the array of cube-corner retroreflective elements is divided into repeating sub-arrays that each comprise a plurality of cube-corner retroreflective elements in a plurality of distinctive shapes that retroreflect incident light in distinctively shaped light patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.