Contour 



Templote Orthogonal Line 



"-X 



20'"^ 



Tangent to Mid- ^ 'Ci 



Contour 





bO 



\^ 



Incoming Orttiogonol 



'"'^Wc.-r-l- /~ 



Turning Point- 



Contour 

 20 ^^ 



Template Orttiogonal' Line 



Turned Orthogonal 



II- 



1071 



Tangent to Mid- 

 Contour -^ 



^o 



\<^ 



1.0461 



Incoming Orthogonal 



NOTE: The template has been turned obout R until the volue '/r ; 1.045 



intersects the tangent to the mid-contour. The templote "orthogonal line 

 lies in the direction of the turned orthogonol. This direction is to be laid 

 off ot some point " B"on the incoming orthogonol which is equidistant 

 from the two contours along the incoming and outgoing orthogonals. 



Figure 2-20. Use of the Refraction Template 



2-72 



