does anybody have experience with ZEMAX and FRED? I am using ZEMAX at the
moment and think about trying out FRED.
Maybe somebody can tell some differences, advantages and disadvantages of
the two programs.
Greetings, Florian
Florian
I use both FRED and ZEMAX because they are different tools for
different (but similar) jobs.
Simply: FRED is a non-sequential ray tracing tool, and ZEMAX is a
sequential raytracing tool. ZEMAX EE has non-sequential raytracing
capabilities but I find them cumbersome to use and most customers in
the Aerospace/Defense/Govt sectors use FRED.
FRED and ZEMAX are used for a huge variety of purposes and it really
depends on the field of work you are in.
I use ZEMAX to design various types of optical systems and optimize
them. I use FRED to verify and quantify different aspects of the
radiometric properties of a system. In particular I use FRED to
import an optical model, and a mechanical model, and perform system or
sub-system stray light analysis.
Now if I were using FRED to design a telescope, I would become
frustrated. Also, If I were to use ZEMAX to quantify the effect of a
spurious reflection, I would become frustrated.
Is the reason you are looking for an alternative to ZEMAX because you
are using the wrong tool for the job?
-Philip
I have a little experience with FRED.
Some time ago we were designing an imaging system using a dichroic beam
splitter and we were initially attracted by the non sequential features and
the program's GUI.
However, in use, we found the documentation poor, and the software
non-intuitive so it never really delivered for us. (a European optics
software rep recently confirmed that we are not alone.)
On the occasions when I spoke to Photon Engineering (the folks who make
FRED) we were offered the opportunity of buying places on a tutorial course
in the US - " really the best way to learn this software".
Perhaps, but the cost and time associated with that course of action was not
at all what I had in mind when we bought the software and I'm afraid the
dongle has languished in our fire safe for the past couple of years.
However, I do emphasise that this is only one view and it would be
interesting to hear from other ng folks who may have had more success.
Perhaps another user has prepared a tutorial based on their use of the
software?
HTH
Iain
In addition to what Philip said about how he uses ZEMAX and FRED, I
found that for doing illumination design, programs like FRED (I do not
use FRED specifically, there are others similar to FRED like ASAP,
LightTools, and TracePro) are more appropriate for the task than
ZEMAX, although there are plenty of people that use ZEMAX for
illlumination.
You might get better input if you can explain a little more about the
types of problems you are trying to solve with the software.
thank you very much for you answers. That's good infomation. I give you some
more background of my work: I am an engineer doing research in the field of
free space optical communications. I already use ZEMAX for optical designs
and just heard about FRED. So I want to inform if it can replace ZEMAX
and/or how good it can interact with CAD sofware like Autodesk.
Thanks and greetings, Florian
"Iain Mackay" <no_one@here> schrieb im Newsbeitrag
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