Colored lamp
First Claim
1. A colored lamp for emitting colored light of a given range of wavelengths, said lamp comprising a housing having an opening, a source of light being disposed in said housing and providing light of a given light wavelength spectrum, and means for absorbing the light of said light wavelength spectrum which has a shorter wavelength than a given range and emitting light with a longer wavelength in the given range, said means being disposed across said opening and including at least one luminescent body of transparent material containing fluorescent particles for absorbing light of the light wavelength spectrum and emitting fluorescent light of said longer wavelength, said particles being disposed in said body, said body being a light concentrator having at least one output location for output coupling light being conducted therein so that said body collects incident light by absorbing it at said particles and by total reflection of the emitted fluorescent light at the boundary surfaces of the body until the emitted fluorescent light is output coupled at said output locations.
2 Assignments
0 Petitions
Accused Products
Abstract
A colored lamp is emitting colored light of a given range of wavelengths and particularly useful for interior and exterior lighting, for luminous advertising, for street lighting, for signal lights and for decorations characterized by a source of light and an arrangement for absorbing a light wave spectrum which has a shorter wavelength than the given range and for emitting light with a longer wavelength due to photo-luminescence with the arrangements including at least one body provided with a luminescent substance for absorbing the light and emitting the luminescent light. The body may be formed by a container of liquid, a bundle of optical fibers or a solid member which acts as a light concentrator in such a manner that the incident light is collected and conducted by means of a photo-luminescent scattering and subsequent total reflection at the boundary surfaces of the body, with the luminescent light being emitted in specific output locations.
149 Citations
18 Claims
- 1. A colored lamp for emitting colored light of a given range of wavelengths, said lamp comprising a housing having an opening, a source of light being disposed in said housing and providing light of a given light wavelength spectrum, and means for absorbing the light of said light wavelength spectrum which has a shorter wavelength than a given range and emitting light with a longer wavelength in the given range, said means being disposed across said opening and including at least one luminescent body of transparent material containing fluorescent particles for absorbing light of the light wavelength spectrum and emitting fluorescent light of said longer wavelength, said particles being disposed in said body, said body being a light concentrator having at least one output location for output coupling light being conducted therein so that said body collects incident light by absorbing it at said particles and by total reflection of the emitted fluorescent light at the boundary surfaces of the body until the emitted fluorescent light is output coupled at said output locations.
Specification