sittinduk93
commented
10 years ago Hi,
Yes, sorry for the disorganised state of our wiki, with 5 people working on the project for 10 weeks we spent most of the time building and not enough time organising our work.
The simple answer is: use biconvex as there is less collimation error. We started using a plano-convex as they are cheaper then moved to the biconvex once we'd proven the concept.
Current research microscopes have a special 'tube lens' which does the same job (focussing the light from infinity) but has special coatings etc. to prevent aberrations. A biconvex lens will do the job fairly well, a plano-convex will also be fine as long as it is the right way round (that's what the diagram is supposed to show).
I've made a few changes to hopefully clear this up.
Thanks, Chris
On 23/02/2014 01:01, nmz787 wrote:
Here you say to use a plano-convex, but the first image shows shows a biconvex, then the second shows the plano-convex (with the ray trace): https://github.com/OpenLabTools/OpenLabTools/wiki/Optical-Setup
But here in the BOM you show a biconvex, which doesn't have the one planar side! https://github.com/OpenLabTools/Microscope/wiki/Microscope-Optical-Components-and-Instructions---Summer-2013
So what's the difference, and which is the better/proper one to use?
— Reply to this email directly or view it on GitHub https://github.com/OpenLabTools/Microscope/issues/2.
Here you say to use a plano-convex, but the first image shows shows a biconvex, then the second shows the plano-convex (with the ray trace): https://github.com/OpenLabTools/OpenLabTools/wiki/Optical-Setup
But here in the BOM you show a biconvex, which doesn't have the one planar side! https://github.com/OpenLabTools/Microscope/wiki/Microscope-Optical-Components-and-Instructions---Summer-2013
So what's the difference, and which is the better/proper one to use?