Method and apparatus for modulating light with a magnetic field专利检索-激子湮灭电子零件及设备专利检索查询-专利查询网

Method and apparatus for modulating light with a magnetic field

阅读：667发布：2020-08-29

专利汇可以提供Method and apparatus for modulating light with a magnetic field专利检索，专利查询，专利分析的服务。并且Delayed fluorescence due to triplet-triplet exciton annihilation in crystalline host materials sensitized with certain dyes (such as anthracene sensitized with Rhodamine B) is modulated by magnetic fields in a more useful manner than conventional delayed fluorescence, and can be used to measure magnetic fields, including spatially modulated fields such as those produced by recorded magnetic tapes. The dyestuffs must be employed in the absence of fluorescence quenching agents and the chromophoric group must be free of atoms having an atomic number greater than 9.，下面是Method and apparatus for modulating light with a magnetic field专利的具体信息内容。

权利要求

1. METHOD OF PRODUCING ELECTROMAGNETIC RADIATION IN ACCORDANCE WITH A MAGNETIC FIELD WHICH COMPRISES A. CONTACTING AT LEAST ONE SURFACE OF A CRYSTALLINE MATERIAL IN WHICH TRIPLET EXCITIONS CAN BE GENERATED WITH A SENSITIZING DYE FREE OF FLUORESCENCE QUENCHING AGENTS FOR DYE FLUORESCENCE, B. ILLUMINATING SAID SURFACE WITH EXCITING RADIATION ABSORBED BY SAID SENSITIZING DYE WHEREBY TRIPLET EXCITIONS ARE GENERATED IN SAID CRYSTALLINE MATERIAL, C. APPLYING SAID MAGNETIC FIELD TO SAID SURFACE; AND D. DETECTING ELECTROMAGNETIC RADIATION EMITTED BY SAID CRYSTALLINE MATERIAL WHEREBY ESSENTIALLY MAXIMUM DECREASE IN THE INTENSITY OF EMITTED ELECTROMAGNETIC RADIATION IS ACHIEVED AT MAGNETIC FIELDS LESS THAN 1,000 OE.

2. Method of claim 1 wherein said crystalline material is anthracene, 1,8-dichloroanthracene, 2-chloroanthracene, or 9,10-diphenylanthracene and said sensitizing dye is Rhodamine B, Rhodamine 6G, pyronine B, ethyl red,

3. Method of claim 2 wherein said crystalline material is anthracene.

4. A device comprising fluorescent means comprising at least one crystal of a substance in which triplet excitons can be created, and a dye sensitizer in contact with at least one face of said crystal capable of transfering energy to said crystal upon illumination with exciting radiation and free of fluorescence quenching agents for said dye fluorescence, means to apply said exciting radiation to said face, whereby triplet excitons are created in said crystal and decay with emission of delayed fluorescence, means to apply a magnetic field to said face whereby the delayed fluorescence is modulated, and means to detect said delayed fluorescence whereby essentially maximum decrease in the intensity of emitted electromagnetic radiation is achieved at magnetic fields less than 1,000 oe.

5. Device of claim 4 wherein said fluorescent means is a slurry of finely powdered crystals in which triplet excitons can be created in an aqueous solution of said dye sensitizer.

6. Device of claim 4 wherein said fluorescent means is at least one crystal plate of a substance in which triplet excitons can be created.

7. Method of claim 6 wherein said means to apply a magnetic field is a magnetic recording member having a pattern of magnetization imposed thereon.

8. Device of claim 4 wherein said fluorescent means is a dispersion of microcrystals of a substance in which triplet excitons can be created in a hardened binder, said microcrystals having a dye sensitizer absorbed thereon.

9. Device of claim 7 wherein said means to apply a magnetic field is a magnetic recording member having a pattern of magnetization imposed thereon.

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Method and apparatus for modulating light with a magnetic field

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