@BEGIN(VERBATIM)


     PARABOLA.BAS is a program which models an off axis
illuminated parabola's refelcted rays and calculates their points
of intersection for certain evenly spaced regions on the sagital
section of a paraboloid with parabolic parameter, P. P=100 models
an f5 system, P=20 an f1 system, etc. The quality of the image
can be roughly assessed by the size of the box that will hold all
of the image points. 


    SPHERIC.BAS  does the same for a spherical
reflector. A radius of 200 models an f5 system, a radius of 40 an
f1 system. 


    HYPERBOL.BAS models a Hyperbolic system, where ((A^2 +
B^2)^0.5)-A = 100 models an f5 system and = 20 models a f1
system. For f5 try 5000 and 1005 from C-A =100 and A^2 +B^2 =
C^2. For f1, try A=5000 and B=447.66.


      These programs run on MBASIC (Basic 80). They appear here
in ASCII text format and canm be accessed by typing <cont>P type
<filename.ext> (eg. Parabola.bas). They were written by Mike
Finerty and are in the Public Domain.