How to specify an LED optic
6 questions to consider for writing a good requirements document for an LED illumination project, by John Ellis founder of Optics for Hire Need assistance designing a custom illumination optic, lens or light pipe? Learn more about our design services here. 6 questions to consider to write a good requirements document for an LED illumination […]
Video On Using LED Optics
New video about using LED optics in the design of lighting systems Need help? Click here to learn more about our custom illumination optic design services.
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 Raysets: A Key to Accurate Data and Avoiding CREE Misinterpretations
Ray sets A rayset (sometimes called a rayfile) is a key element in the design of any illumination system. It describes the path of hundreds of thousands, millions, and even billions of rays of light as they leave a source (typically an LED). This data set is used in a ray tracing program like Zemax […]