Patent Number: 6,305,811

Title: Illumination system having an array of linear prisms

Abstract: An illumination system provides a light output distribution that is ideally suited for home and office applications. The illumination system generally comprises a solid waveguide and a light directing structure located on a side opposite of the waveguide's light output side for controlling the light output distribution from the illumination system. The light directing structure may be unitarily formed with the waveguide or it may be secured thereto by an interface which provides approximately 100% contact between the waveguide and light directing structure. The light directing structure includes an array of light directing features configured as generally lenticular prisms that extend in a direction substantially perpendicular (i.e., not parallel) to the average direction at which light rays enter and propagate through the waveguide. Each light directing feature defines an included angle that controls the distribution of light output from the illumination system in a first direction. The interface, when provided, controls the distribution of light output from the illumination system in a second direction that is generally orthogonal with respect to the first direction.

Inventors: Beeson; Karl W. (Princeton, NJ), Zou; Han (Windsor, NJ)

Assignee: Honeywell International Inc.

International Classification: F21V 8/00 (20060101); F21V 008/00 ()

Expiration Date: 10/23/2018