A dyestuff laser which consists of a reservoir for the dyestuff solution and an energy source, coupled thereto, which is capable of exciting the dyestuff solution to produce an emission, the radiation generated lying in the wavelength range of 550 to 680 nm. The dyestuff is a sulforhodamine....http://www.google.com.hk/patents/US4072911?utm_source=gb-gplus-share專利 US4072911 - Dyestuff laser
