LightFair, Fundamentals of Luminaire Design.
LightFair International (LFI) is the premier lighting exhibition in the US and it draws thousands each year. LFI is equal lighting education and product showcase with the first half of the conference filled with panel discussions, keynote events, and seminars with topics ranging from aesthetic lighting design to detailed lighting controls. As part of an […]
How does a light pipe overmold work?
One common production method for light pipes is the overmold . This method uses an inexpensive light diffused plastic overmolded with a black case to generate a light-pipe. The “Win” keyboard key is one good example. “Win” key appearance to the observer. The black key body has a hole; during manufacturing, this hole is filled […]
Why spot and beam uniformity are not always equal
For many LED optic projects, a spot size and beam angle can be specified with a single uniformity value. In cases of beam angles above 30 degrees, things get tricky. Please see the images below for an explanation. If you prefer to understand the math… Illuminance is changed by formula E=(I/r*r)*cos(A), where E – illuminance, […]
Understanding the optics behind a PAPI light
In a previous article we talked about Aviation Light Optics. and discussed a runway light system called Precision Approach Path Indicator (PAPI). Now we would like to go more in detail into PAPI design and describe their design requirements. The PAPI system is a set of four light sources that help the pilots correct the […]