Laser system
US5434880A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1993 |
| Grant date | Jul 18, 1995 |
| Priority date | — |
| Expiry date | Jun 28, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser system comprises an optical head, a power supply and a computer for controlling the power supply. The optical head comprises a pair of mirrors and four pumping sections. Each pumping section comprises a pair of gas discharge lamps pumping an Nd:YAG laser element. The power supply provides the lamps with alternating current at 25 kHz so that the laser system produces a continuous, modulated or pulsed output light beam. The power supply comprises three boost converters connected in parallel for converting three phase mains supply to direct current and four DC-AC converters. Each DC-AC converter converts the DC output from the boost converters to an AC supply for the lamps of a respective one of the pumping sections. Each DC-AC converter comprises a resonant circuit having an inductor and capacitor connected in series, the lamps being connected across the capacitor, a pair of transistors for conducting current through the resonant circuit in alternating directions, and a control circuit for the transistors. The power supply is also arranged to supply alternating current at a relatively high voltage to the lamps for triggering a discharge. In a modification, the output of the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.