2021 Illumination Design Problem – FAQ

The Curse of Prince Lambert Frequently Asked Questions and Problem Clarifications Q. What should I do if my software does not support tm25? A. Please contact your vendor and ask them to contact the illumination guild (illuminationguild@iodc.org).  The guild will work with the vendor to provide a file that you can use. Q. Why do Read More …

The 2021 IODC Shafer Cup Competition

The Down Under Lens Background All lens designers “up here” (north of the equator) know that light travels from left to right. However, what is not well known is that “down under” (south of the equator), light travels from right to left. This causes problems if a design prescription done “up here” is sent “down Read More …

The 2021 IODC Shafer Cup Competition – FAQ

The Down Under Lens Frequently Asked (and Unasked) Questions Q.    Does light really go from right to left south of the equator? A.    No, but the concept makes for an interesting Lens Design Problem. Q.    Do lens designers south of the equator really use a coordinate system going from right to left? A.    No, but Read More …