Patent · US Expired

Corona preionization assembly for a gas laser

US6757315B1 · kind B1 · utility

4Cited by

56References

50Claims

0Family size

Assignee

Lambda Physik AG · DE

Inventors

Igor Bragin · Göttingen, DE
Vadim Berger · Oebisfelde, DE
Ivan Tassy-Julien · Göttingen, DE
Uwe Stamm · Göttingen, DE

Key dates

Filing date	Oct 19, 2000
Grant date	Jun 29, 2004
Priority date	—
Expiry date	Oct 27, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH01S3/0384
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A preionization device for a gas laser includes an internal preionization electrode having a dielectric housing around it such that the preionization device is of corona type. The internal electrode connects to advantageous electrical circuitry, preferably external to the discharge chamber via a conductive feedthrough. The circuitry reduces the voltage across the dielectric tube of the preionization unit to reduce over-flashing at tube ends and oscillations due to residual energies stored in the dielectric. A semi-transparent mesh electrode between the preionization unit and the discharge area prevents field distortions and discharge instabilities.

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