Advertisement
Meta) HaHde Lamp
The meta) hatide tamp consists of argon, mercury and
hatogen compounds enclosed in its fuminous tube.
j^Oshows the spectra! distribution of this iamp. At
the center of an arc discharge, haJogen compounds are
dissociated into metai atoms and haiogen atoms, the
meta) being excited so that it emits a metai - specific
spectrum. At the periphery of the arc discharge, meta!
atoms and haiogen atoms are bonded again. Repeating
this cyclic process causes iight to be generated.
The meta) haiide tamp features a higher [uminous
efficiency than haiogen and xenon iamps. Depending on
the compounds enclosed in the tamp tube, different iight
spectra are generated. Thts atso enaMes natura)
white fight to be produced as the projector tight
source. Metai haiide tamps are a mainstream product as
the tight source of high- and middle- grade liquid crystal
projectors. After projector turn - on, 2 to 3 minutes are
required before the tight output stabilizes. After the
projector is turned off, the cooling fan operates for 30 to
60 seconds to coot down the tarnp and reduce gas
pressure inside the tamp.
During this "cooling down" period, the projector cannot
be turned on.
—5
Advertisement
