Head-mounted lighting assembly
US5440462A · kind A · utility
46Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Apr 6, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/205
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compact, lightweight illumination system for producing a uniform, intense, and adjustable light beam. The illumination assembly may be easily mounted upon the head of a user, either on a headband or a spectacle frame. The illumination system includes a unique optical subassembly consisting of a low pass heat filter, a low scatter angle diffuser, and a compound projection/focussing lens sandwiched together and disposed along an optical axis. The optical subassembly may be used in conjunction with a conventional filament lamp illumination source to produce a readily adjustable, yet uniform and intense, beam of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.