Candela AlexTriVantage, Руководство оператора

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8501-00-1800, Revision 05 Confidential 2-3
Candela Corporation AlexTriVantage Laser System
Introduction
This chapter provides detailed reference-based descriptions of all the panels, controls, and
screens for the AlexTriVantage Laser system. It includes detailed illustrations of the unit.
The Laser System
Figure 2-1 shows the AlexTriVantage Laser system.
Figure 2-1: Candela AlexTriVantage Laser System
System Description
The AlexTriVantage Laser consists of an Alexandrite laser head, a Q-switching mechanism,
a power supply and a deionized (or distilled) water circulator. The laser head contains the
cavity mirrors, Pockels cell, solid state laser medium (the Alexandrite rod), and two high
intensity xenon flashlamps which excite the laser medium. A calibration port with an internal
meter is located on the control panel, which is used to verify the transmission of the optical
fiber and Handpiece, and to calibrate the output of the Handpiece at selected fluence levels.
The temperature of the laser head is regulated by the circulation of deionized (or distilled)
water at a controlled temperature.
To provide energy to the flashlamps, a high voltage power supply charges a storage
capacitor; a trigger pulse applied to the gate pins of four SCRs (high voltage switches)
causes the capacitor to discharge through the flashlamp. The resulting flash excites the
Alexandrite rod, causing the emission of a pulse of laser energy. A low voltage is supplied to
the flashlamps to maintain ionization in the tubes. This "simmer" ionization is not sufficient to
produce the optical gain required for laser output, but it improves the response time of
flashlamps and extends their life.