Appendix H THE θi/θo CONCENTRATOR
Figure H.1 shows the concentrator with appropriate notation. From the triangle QQ’S we have
Figure H.1 Design of the θi/θo concentrator.
Also, since the angle , the π − θo − θi, the triangle RQS is isosceles, and so QR = QS.
From the polar equation of the parabola,
so from Eq. (H.1) we find ...