All lenses modelled

[NemoAndrea]

I converted all the lens models to Part Design items. For some reason nested items (like Part) are generally not selectable. But putting it in a Part Design is a suitable workaround.

In addition, doublet lenses have to be modelled as two separate geometries (two separate Part Design objects) to be able to model them with the Optics Workbench. This is a bit annoying because it makes assembling the design more complicated than needed. But hey, at least it works.

Let's have a look at the image return paths + UV illumination paths. These should all be collimated going into the objective.

And the two illumination sources (white light in green, ~630nm in red). These are focussed in the back focal plane of the objective. The exact distance of the BFP to the objective flange is not known to me; I am waiting for more details from suppliers.

The layout above is an implementation of the diagram below. Note that the laser light path is not yet implemented.