| 摘要 |
Laser light in the wavelength range of 420-480 nm is obtained with a dyestuff laser containing a dyestuff of the general formula <IMAGE> +TR <IMAGE> wherein R and R1 independently of one another represent <IMAGE> R2 denotes an optionally substituted alkyl radical with 1-4 C atoms, R3 and R4 independently of one another represent hydrogen or optionally substituted C1-C4-alkyl or conjointly with the nitrogen can form a 5-membered or 6-membered heterocyclic ring and m and n denote 1 or 2, and wherein the aromatic radicals contained in the formula can be further substituted, in a solvent which does not interfere with the emission, at a concentration, which emits laser beams, of, preferably, 10-2 to 10-5 mols/liter. |
