I have an optical microscope and some opaque samples that I want to examine the surface of. I drew up a picture of how the microscope is arranged (attached). There is a series of lenses on a rotating drum that are located underneath the stage where glass slides are placed. The lenses usually come very close to the glass, almost touching it. I'm having a lot of trouble lighting up the surface of the sample I need to look at. There needs to be quite a bit of light in order to get any decent image, and there is no space underneath to shine light from below. I have an optical fiber illuminator (brand Fiberlite) and it's still too big to snake through underneath. The lenses usually block all the light. I tried to put aluminum foil on the bottom of the glass slide and use it to reflect the light fom above but that failed too, there was simply not enough light. I'm stuck right now and need some help. Any ideas?