The IS-PHP Pinhole Positioner makes it simple to add a light source to your microscope.  With an SMA connectorized fiber optic cable from any light source , it provides a method for projecting a collimated beam.  When used with the CBH-1 beam splitter module mounted in an infinity-corrected microscope, it positions a focused spot on your sample.  The accompanying chart shows spot sizes available, based on pinhole size and objective power.  The 100 TPI adjustment screws provide precise spot positioning.  Thread and axis locks, as well as the patented Spring Pivot, provide long-term stability.