Fluorescence microscopes
For biological and medical research fluorescence micrscopes are used to visualize certain parts of living cells and tissues with help 
of fluorphores. One or more fluophores are added to the specimen which needs to be researched and attach to certain tissue parts like proteins. When exposed to short-wavelength light (excitation light) fluorphores light up (emission light). With this one can distinguish for example tumor cells from other cells, separate cells, prove the presence or absence of antibodies, etc. The fluorescence microscope is constructed with an incedent mercury vapor light source, special Plan Fluarex semi-apochramatic objectives, a set of excitation and emission filters and a semi-transparent mirror. The translucent light source is a modern 3 Watt illuminator
