Random rays from Primary Concentrator enter within design angle.
Incident rays refract at front surface of secondary, and undergo total
internal reflection at sides of cone.
Total internal reflection continues in extractor rod.
Rays escape at extractor tip and are absorbed by receiver.
| 
NASA Glenn Research Center![[GRC Hanger link to Glenn Research Center Home Page]](../../images/hangarsm.jpg)
![[NASA Logo link to NASA national site]](../../plateimg/top_left_globe.gif)
![[horizontal rule]](../../images/rule.gif){kind=small}