WordNet
compound lens
n. a lens system consisting of two or more lenses on the same axis
Usage examples of "compound lens".
If you take all the atoms of such a compound lens and throw them together at random under the jostling influence of the ordinary laws of physics in nature, it is theoretically possible that, by sheer luck, the atoms would just happen to fall into the pattern of a Zeiss compound lens, and even that the atoms round the rim should happen to fall in such a way that the name Carl Zeiss is etched out.
If it was a compound lens microscope, well, they were still a long way ahead of everyone else.