Laser

Details Laser Laser

2008-03-31

2010-11-09

Nguyen, Dung T (Department: 2828)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C372S038030, C372S038040, C372S038090, C372S029012, C372S029015

Reexamination Certificate

active

07830935

ABSTRACT:
A laser (10) provided with a discharge activation power supply (11) supplied with power from a 3-phase AC power line, the discharge activation power supply (11) provided inside it with three first capacitors (12a,12b, and12c), the laser (10) including an external ground fault protection device comprising a voltage measuring unit using the first capacitors (12a,12b, and12c) to measure voltages between the phases of the 3-phase AC power line and the ground and a power breaking unit (18) comparing the values of voltages measured by the voltage measuring unit and a predetermined threshold and breaking the supply of power from the 3-phase AC power line to the power supply (11) when the value of a voltage exceeds the threshold.

REFERENCES:
patent: 2007/0195470 (2007-08-01), Zhang et al.
patent: 1102911 (1995-05-01), None
patent: 52-109533 (1977-08-01), None
patent: 6-334249 (1994-12-01), None
patent: 8-322140 (1996-12-01), None
patent: 2003-46172 (2003-02-01), None
patent: 2004-241605 (2004-08-01), None
patent: 2006-135205 (2006-05-01), None
Japanese Notice of Reasons for Rejection mailed Sep. 30, 2008 issued in Japanese Application No. 2007-117160 (including a partial translation thereof).
Japanese Notice of Reasons for Rejection mailed Jul. 8, 2008 issued in Japanese Application No. 2007-117160 (including a partial translation thereof).
Chinese Notification of the First Office Action mailed May 12, 2010 in Chinese Patent Application No. 200810092372.6 (including an English-language translation thereof).

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