To make the adjustment I fix the injection unit (I have a small workbench), and I put in front of the hole a white LED - too fixed, so that the illumination is constant. I take up a fiber from the injection unit and to the other end of the fiber, I put a camera of guide (Watec, or Lumenera, for example). I have an adapter which allows to take up the fiber on a frame C (you can tinker an equivalent?). Well on this point, i've changed for using the eshell flat lamp and a windows frame around a bright order. fast refreshment, with live statistics, are the key. - The alignment is rather simple: it is necessary to find the positioning of the cylinder (by playing on 3 screws in 120 °) which gives the maximum illumination onto the camera (statistics in the window). The final adjustment is very fine (that takes place on the pressure of tightening of screw, but with little practice, that does very well.
Thank you very much for explaining in detail. But I am anxious to do this. Do you have some pictures about this process? This would help me. You write, that you illuminate the fiberinjection with an LED lamp. You put away the 50µm fiber from the injection and you have installed a ccd on the 50µm fiberconnector of the fiberinjection? Is this correct so? Or have you left the 50µm fiber on the injection and you put the CCD on the other end of the 50µm fiber?
As already said, some pictures would be helpfull for me. perhaps you could send some as pm