Dyestuff laser
First Claim
1. Dyestuff laser consisting of a reservoir containing a laser dyestuff solution and a pump light source connected thereto, which is capable of exciting the dyestuff solution to produce an emission, characterised in that the dyestuff solution contains a dyestuff of the general formula ##STR17## wherein Z1 and Z2 represent C1 -C4 -alkyl radicals which can also be substituted by hydroxyl, chlorine, C1 -C4 -alkoxy, nitrile or phenyl,Z3 represents hydrogen or a phenyl radical substituted by an o-carboxyl or C1 -C3 -alkoxycarbonyl radical,Z4 represents hydrogen or methyl,Z5 represents hydrogen, C1 -C5 -alkyl, chlorine, C1 -C3 -alkylsulphonyl, benzylsulphonyl, nitrile, sulpho, optionally mono- or di-C1 -C4 -alkyl-substituted carbamoyl or sulphamoyl, phenyl, cyclohexyl, phenyl-C1 -C3 -alkyl or C1 -C4 -alkoxy radicals or, together withZ6, the remaining members of a fused benzo, cyclohexano or cyclopentano radical, andZ6 represents hydrogen, chlorine or C1 -C4 -alkyl.
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Abstract
Coherent monochromatic radiation (laser light) in the wave length range of 450 to 560 nm is obtained by exciting with a pump light source a dyestuff solution containing a dyestuff of the formula ##STR1## wherein R1 represents hydrogen, alkyl, cycloalkyl, aralkyl, an alkylene radical linked to the 6-position of the coumarin ring system or, together with R2 and the nitrogen atom to which they are bonded, and optionally with inclusion of further heteroatoms as ring members, represents the remaining members of a heterocyclic ring system, R2 represents alkyl, aralkyl or an alkylene radical linked to the 8-position of the coumarin ring system and R3 represents hydrogen or an optionally substituted phenyl radical, the rings A and B can carry further substituents and a carbocyclic 5-membered or 6-membered ring can be fused to the ring B, in a solvent which does not interfere with the emission, at a concentration, which emits laser beams, of, preferably, 10-2 to 10-4 mol/liter.
31 Citations
2 Claims
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1. Dyestuff laser consisting of a reservoir containing a laser dyestuff solution and a pump light source connected thereto, which is capable of exciting the dyestuff solution to produce an emission, characterised in that the dyestuff solution contains a dyestuff of the general formula ##STR17## wherein Z1 and Z2 represent C1 -C4 -alkyl radicals which can also be substituted by hydroxyl, chlorine, C1 -C4 -alkoxy, nitrile or phenyl,
Z3 represents hydrogen or a phenyl radical substituted by an o-carboxyl or C1 -C3 -alkoxycarbonyl radical, Z4 represents hydrogen or methyl, Z5 represents hydrogen, C1 -C5 -alkyl, chlorine, C1 -C3 -alkylsulphonyl, benzylsulphonyl, nitrile, sulpho, optionally mono- or di-C1 -C4 -alkyl-substituted carbamoyl or sulphamoyl, phenyl, cyclohexyl, phenyl-C1 -C3 -alkyl or C1 -C4 -alkoxy radicals or, together with Z6, the remaining members of a fused benzo, cyclohexano or cyclopentano radical, and Z6 represents hydrogen, chlorine or C1 -C4 -alkyl.
Specification
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- Resources
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Current AssigneeBayer AG
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Original AssigneeBayer AG
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InventorsRaue, Roderich, Harnisch, Horst, Schafer, Fritz Peter
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Primary Examiner(s)Edmundson, F.C.
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Application NumberUS05/557,081Time in Patent Office855 DaysField of Search252/301.2 R, 252/301.17, 331/94.5, 331/94.5 LUS Class Current372/53CPC Class CodesH01S 3/213 including an organic dye
