ZEMAX Users' Knowledge Base

Ronian Siew

Ronian is a Senior Optical Designer at Thales Electro-Optics Pte. Ltd. in Singapore. He has 7+ years of optical engineering & design experience and holds a degree in Physics, and a Masters Degree in Optics both from the Institute of Optics, University of Rochester, New York. Prior to his current position at Thales, Ronian worked as an optical physicist at Agfa Corp. (Wilmington, MA), where he helped to develop the world's first commercial prepress product using the Grating Light Valve spatial light modulator.

 Articles by this Author

What is an "Effective F-Number"?

This article explains:
  • The meaning of F-Number for optical systems with non-circular stops
  • The theoretical basis for the defined effective F-Number in Zemax