Safety application of holographic material
US5239396A · kind A · utility
Inventor
Key dates
| Filing date | Feb 25, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Feb 25, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2250/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic diffraction media is disposed on a physical object in a highly visible position so as to enhance the human visibility of the object, and therefore the safety of humans using or associated with the object. The media may be a piece of thin plastic (polyester) film with an adhesive backing, with a release paper that is removed when it is desired to attach the film to the object. The object may be a road marker, road sign, a paved road itself (i. e. the holographic media may be a lane divider or a side strip for the road), a spoked wheel, a tire with a hubcap or wheel cover, a propeller, a safety vest, or a jogging shoe (affixed to the upper heel exterior of the shoe). The holographic diffraction media is inexpensive, light weight, and is more visible in environments with low and/or diffuse light than are reflectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.