Patent · US Expired

Utilization of a material possessing a micro-duplex grain structure

US4892991A · kind A · utility

2Cited by

8References

3Claims

0Family size

Assignee

Diehl GmbH & Co. · DE

Inventors

Hansjorg Stadler · Crimmitschau, DE
Peter Ruchel · Achern, DE

Key dates

Filing date	Mar 20, 1989
Grant date	Jan 9, 1990
Priority date	—
Expiry date	Mar 20, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S359/90
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Deflection of laser beams, irrespective as to whether this is implemented within or externally of the laser itself; necessitating the utilization of metal mirrors or reflectors of high-quality which, in short, are designated as laser mirrors or reflectors. Laser mirrors of that type require an extremely good mirror surface, a high reflective capability and a good geometric planicity, as well as a high surface hardness. Brass possessing an inherently known microduplex matrix or grain structure provides a significant improvement in the properties of laser mirrors. A material of that type has, by nature, a microcrystalline structure, possesses a freedom from stresses, a high degree of stiffness, and a good material hardness.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.