Chromatic microscope illumination device

Claim 1

A LIGHTING SYSTEM FOR USE WITH A MICROSCOPE HAVING A SUBSTAGE CONDENSING LENS COMPRISING, IN COMBINATION, A TUBULAR MEMBER HAVING ITS INNER WALL SURFACE LIGHT REFLECTIVE, MEANS FOR ILLUMINATING ONE END OF SAID MEMBER WITH A VISIBLE SPECTRUM, THE COMPONENT LIGHT WAVES OF WHICH DIVERGE IN SPACE, THE DIAMETER OF SAID TUBULAR MEMBER AND THE DIVERGENCE OF SAID LIGHT WAVES BEING SUCH THAT ONLY THOSE LIGHT WAVES WHICH FALL WITHIN A PARTICULAR PORTION OF SAID SPECTRUM ENTER ONE END OF SAID TUBULAR MEMBER, SUFFER A REFLECTION FROM THE INNER WALL SURFACE THEREOF AND EMERGE FROM THE OTHER END OF SAID TUBULAR MEMBER, MEANS FOR TRANSFORMING SAID EMERGING WAVES INTO DIVERGING WAVES, SAID SUBSTAGE CONDENSING LENS BEING POSITIONED IN THE PATH OF SAID DIVERGING WAVES WHEREBY AN OBJECT LOCATED AT THE FOCUS OF SAID CONDENSING LENS IS ILLUMINATED SIMULTANEOUSLY WITH OBLIQUE LIGHT OF DIFFERENT COLORS.