FIG 2 (IMAGE) Compuscript Ltd Caption Fig. 2. (a) Extraction prisms are divided into several zones with different fill factor. (b) Illumination uniformity of the output light. Credit OEA Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.