Flexible Low-cost Platform for Beam Pattern Optimization

Existing lighting fixtures do a poor job of providing targeted lighting distributions, typically leaving many areas overlit and other areas underlit. This wastes substantial energy and causes safety and visual comfort issues. The problem stems from the fact that only a few standard beam shapes are available in massmarket commercial products, and custom beam profiles typically require expensive custom optics. Glint Photonics, Inc. is developing a new lowcost lighting fixture platform that can be easily customized to produce an infinite variety of different lighting patterns. This “Lightfield” technology provides a custom light distribution as the composite output of an array of sources, each casting a narrow beam in a specified direction. The light distribution pattern is controlled by parts that can be easily customized at low cost. In Phase I, Glint designed, built, and tested prototype Lightfield fixtures customized for a variety of applications. The prototypes met all target requirements and provided compelling performance benefits. A customized wallmount fixture reduced glare light from 17% to below 4%. A customized fixture for curved roadways cut wasted light in half and also reduced the number of required fixtures in half. In Phase II, Glint will develop and validate highprecision productlevel prototypes of Lightfield fixtures. Fixtures customized to light curved roadways will be tested and validated in collaboration with Virginia Tech Transportation Institute. Architectural fixture prototypes for highefficiency lowglare lighting of facades and paths will be designed, built, and tested in realworld installations. Lightfield fixtures will provide substantial improvements in lighting quality over a broad range of application cases. The benefits further include reduced energy use, lower glare, and easy installation. The ability to produce complex beam patterns allows one Lightfield luminaire to do the work of several conventional luminaires, greatly simplifying procurement, construction, wiring, and installation, and resulting in substantial cost savings to customers.