VARILITE VL4, Руководство пользователя

Страница: 21 / 238

C
HAPTER
1. I
NTRODUCTION
1-7
02.9628.0010 CONFIDENTIAL
7-Oct-97
1.2 Equipment Description
The VL4 wash luminaire is a light weight, fully-automated lighting
instrument. The luminaire uses a 400 watt metal halide arc source lamp
with an aluminum parabolic reflector to produce a powerful wash beam.
The head assembly contains mechanisms for control of intensity, color, and
beam attributes. Beam color is provided by crossfading dichroic color
filters featuring independent cyan, magenta, and amber color panel control.
A mechanical dimmer provides smooth full-field control at all light levels
and a shutter/douser provides fast blackouts, bumps, and strobe-like
effects. The position of the lamp in respect to the reflector may be varied
to change the beam angle from spot to flood, providing further beam
output versatility. A glass diffuser containing textured glass provides
diffusion capabilities. The rear housing provides access to the lamp,
through which the beam shape may be adjusted.
The VL4 head and yoke assembly is mounted on an electronics chassis,
which houses components for lamp power and luminaire control. The
chassis contains an arc power supply (APS), voltage selector board, pan
mechanism, cooling fan, and two processors for luminaire control.