hopebox: E^pn-rB You can adapt the approach as you put in your post:
- Get the light source information (ray angle)
l$W)Vk<B(T - Set it up in the sequential mode first, with the positions and the initial lens parameters.
5,Co(K - There is a built in merit function type called Angular Radius what can be useful to design a collimating system. However, you should be aware that the LED source is an extended source and to model it more realistically you should add more field points to represent this nature of the light source. Once you can something close (hopefully) then you can switch it to Non-seqential mode with the real light source file (using Source file) and the lens parameters you came up with under the sequential mode.
E?Qg'|+_ .......
+p]@ b 
