Printed Light Guide Showcase

Fusion Optix Printed Light Guides are a great solution for your edge-lit light guide needs.
With several different extraction side options, as well as an extensive range of possible form factors and surface finishes, Fusion Optix printed light guides can be integrated into nearly an lighting application: from signage and architectural lighting to downlighting and wall-washing.  If you are looking for any specific distributions, or a unique design, please don't hesitate to contact us

Benefits:
-Efficiencies of up to 85%
-Ultra-thin fixture profiles
-Wide choice of beam distributions
-No tooling costs
-Choice of surface finishes & effects

Many customization options available:
-Length, width, & thickness
-3D Shapes
-Extraction layer finish
-Extraction sides
-Choice of materials

For samples or purchasing information, reach out to us at:
+1-781-995-0805
sales@fusionoptix.com

What are Light Guides

What Are Light Guides

Light Guides are a clever method of directing light in applications where direct light from the light source can not be used due to physical, economic, aesthetic or other restrictions.

Light guides (also called light pipes) are a major component in edge-lit LCD display back lights where there is a CCFL or LED light source at one or two opposite edges of a light guide, which extracts the light towards the viewer. This approach allows for the use of less powerful light sources while maintaining high screen uniformity and very thin display profiles.

Basic single-edge-lit light guide that extracts light from one side

Rectangular display guide with visible extraction side

With the growing popularity of Solid State Lighting (LEDs and OLEDs), light guides are becoming increasingly sought for the creation of ultra-thin sleek and stylish lighting and signage fixtures.

Light guide that extracts light from both sides

Fusion Optix Direct/Indirect fixture utilizing 2-side light-extracting guide. LED light sources are hidden in the cylindrical bezels along the edges of the fixture.

How Light Guides Work

Light guides rely on the combination of total internal reflection (TIR) and a light extraction method to create a flat thin evenly emitting surface. For TIR to occur light has to strike the inner surface of the guide at an angle smaller than a specific critical angle. All light rays that strike the surface at angles higher than the critical angle are transmitted. 

What sets apart light guides from mere plastic rectangles is that light guides greatly increase the chance of light being transmitted through the extraction sides. This can be achieved in two ways:

Critical Angle Transmission

In CAT numerous imperfections are introduced at the extraction surface that increase the chance of light reaching critical angle. Depending on the light source, light guide dimensions and other factors, special imperfection patterns and shapes are developed to ensure maximum light extraction.

Frustrated Internal Reflection

In FIR a scattering material is applied to the extraction surface. The scattering material has different optical density from both the light guide and air, which results in light being transmitted from the guide to the scattering material.

Designing Efficient Light Guides

There are several factors that influence light guide efficiency including mixing distance, edge coupling, light scattering and reflectance. You can read more about light guides and efficient light guide designs in our downloadable Light Control and Efficacy using Light Guides and Diffusers presentation at www.fusionoptix.com.