Apparatus for enhancing visual perception of selected objects in recreational and sporting activities
US5592245A · kind A · utility
53Cited by
12References
4Claims
0Family size
Inventors
Key dates
| Filing date | Aug 10, 1994 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Aug 10, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B43/008
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To enhance perception of a yellow tennis ball while playing or watching a tennis game, the game is viewed through an optical filter mounted between the participant or spectator and the ball. The optical filter has predetermined transmittance having a pronounced peak centered substantially around 500 to 600 nanometers that passes a high percentage of incident light reflected and fluoresced by the tennis ball, but passes a substantially lower percentage of light in the remaining portion of the visible spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.