Understanding Raysets and Ray Files for Accurate Illumination Design
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 […]
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 […]