----- file created by makedoc on: Thu Nov  5 15:14:57 2009
----- Documentation for /scisoft/xop2.3/extensions/shadowvui/src/lib/rcil.pro -----

 NAME:
	RCIL
 PURPOSE:
	Calculates the tangential and sagittal focusing radii, given the
	focal distances. 
 CATEGORY:
	Optics
 CALLING SEQUENCE:
	rcil
 KEYWORD PARAMETERS:
    GROUP
	The widget id of the parent. Also used for centered the input/output 
	windows.
 OUTPUTS:
	The outputs are shown in a text window.
 COMMON BLOCKS:
	COMMON rcil str   
	(to store the inputs for following runs)
 SIDE EFFECTS:
	None.
 RESTRICTIONS:
	If the IDL session support widgets, the i/o is done via widgets, 
	otherwise it is done by terminal.
	None.
 PROCEDURE:
	User the well known formulas:
	rt=2*p*q/(p+q)/sin_theta;
	rs=2*p*q*sin_theta/(p+q);

 MODIFICATION HISTORY:
	Created 2001-03-08 by M. Sanchez del Rio from a c code
	01/03/14 srio@esrf.fr force to use cm and eV
	06/02/16 srio@esrf.fr makes it more readible the mirror inputs

