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PRINCIPLE OF OPERATION:

 A point source of light is located at one end of a Plylight Light Distribution Tube (LDT). This light is shaped with a lens or reflector that provides a collimated and concentrated beam of light. Light from this source strikes an ever-increasing curved truncated cone segment that lies within the tube along its axis. This surface re-directs and scatters light out of the tube, perpendicular to the tube’s axis and uniformly along its length. This we call the Light Distributing Surface (LDS).

Our Light Distribution Tube (LDT) is made with a multi-ply combination of polycarbonate films. The interior and exterior films have a protective hard coat, shielding them from exposure to ultra-violet radiation, providing a high degree of abrasion resistance and protecting the tubes from numerous chemicals. These films are rolled into tubes and bonded permanently along their longitudinal seam. Multiple patents have been awarded and others have been applied for in the USA and around the world.

A light source, located at one end of an LDT, enables convenient changing of bulbs, and the opportunity to locate the light source’s heat and electrical service outside of hazardous, electrically or heat sensitive spaces, such as chemical or explosive storage rooms, computer rooms, or freezer rooms.

The LDTs are designed to require minimum maintenance. In addition to easily replacing the lamps, the exterior of the tube to be cleaned need only be wiped, when necessary, with a dry cloth sprayed with an anti-static chemical.

DIFFERENCE BETWEEN A PLYLIGHT OLF LIGHT PIPE AND A (NON OLF) PLYLIGHT LDT TUBE:

3M optical lighting film (OLF) is the basic component of standard “lightpipes”. These lightpipes are by design tubes that require a relatively broad beam of injected light in order for that light to “bounce” (be totally internally reflected) down the tube. When that light strikes an extractor that lays flat on the interior wall of the tube that light will be redirected through the tube. In a paradigm shift, the Plylight Light Distribution Tube (LDT) is designed without this special material (OLF) to hold light in the tube, but rather relies on a collimated beam of light to be projected down the tube reducing bounces (and light loss) until this light strikes an ever-increasing curved surface,  our Light Distribution Surface (LDS).  This surface redirects the light out of the tube uniformly along its length.