Retroreflective prism structure with windows formed thereon
US5565151A · kind A · utility
87Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Sep 28, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Retroreflective prisms are formed with windows thereon by removing a portion of the prism mold on one prism pair leaving the apex of the prism intact. In this manner smaller prisms are formed adjacent larger prisms. Optionally, the optical axis of the prisms may be tilted with respect to one another, preferably in a negative direction. The smaller prisms with windows provide increased brightness and optimize the retroreflection light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.