Hi, I just started using freesnell. It seems like it will be really useful for a bunch of AR and HR coating design and verification work. But I am having a tough time getting it to work right and graph. I started with the dielectric examples, I open freesnell and from the antireflective example I type:
(require 'FreeSnell) (define (anti) (define H 4.2) (define L 2.2) (plot-response (title "Growing an Antireflection Coating" "anti") (output-format 'png 600 256)
(font 13) (wavelengths 7700e-9 12300e-9) (range 0 .02) (incident 0 'R) (optical-stack (substrate 1) (layer L 1076.97e-9) (layer H 629.03e-9) (layer L 457.49e-9)
(layer H 131.55e-9) (layer L 1234.92e-9) (layer H 1142.59e-9) (layer L 2590.54e-9) (layer H 81.75e-9) (layer L 1827.50e-9) (layer H 84.60e-9) (layer L 563.34e-9)
(layer H 285.97e-9) (layer L 157.14e-9) (substrate 4.0) )))
What I get back is:
#<unspecified>
And nothing more happens, no plot or anything. I looked all over google for more literature on it, but all I found was this forum.