Patent · US Expired

Xenon lamp system for materials testing apparatus

US5488267A · kind A · utility

4Cited by

3References

9Claims

0Family size

Assignee

Heraeus Xenotest GmbH · DE

Inventors

Bernd Rudolph · Forstern, DE
Klaus Dietz · Ulm, DE
Klaas Oostlander · Hanau, DE

Key dates

Filing date	Jul 26, 1994
Grant date	Jan 30, 1996
Priority date	—
Expiry date	Jul 26, 2014

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/76
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An illumination system for weathering and fading resistance test instruments is provided with a pulse-driven xenon gas discharge lamp with an elongated discharge bulb that has an electrode spacing in the range from 10 to 50 cm; by adjusting the duty factor of the lamp current by means of an electronic control unit, a predetermined ratio between ultraviolet and infrared radiation is achieved; for the sake of light density, the lamp bulb is bent in a U.

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