Passive protection of optically sensitive materials with transition metal organometallic cluster compounds
US5252256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1990 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Mar 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3551
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Optically sensitive materials such as sensors or the human eye are passively protected against overexposure to high intensity light in the visible range using a reverse saturable absorber organometallic cluster compound having a core of at least two multiply-bonded transition metal atoms selected from group 8, 6b, or 7b of the periodic table. The core atoms are bound together with ligands that permit the formation of a complex. A preferred organometallic cluster compound is cyclopentadienyl iron carbonyl tetramer. As the intensity of incident light increases, the intensity of transmitted light also increases up to a satur PAC GOVERNMENT RIGHTS This invention was made with Government support under Contract No. N62269-87-C-0263 awarded by the Department of the Navy. The Government has certain rights in this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.