The invention relates to a high-pressure discharge lamp with a
substantially elongate bulb which has two neck regions and a vacuumtight
discharge chamber in a central position. The invention further relates to
a reflector lamp and a projection system comprising such a high-pressure
discharge lamp. A disadvantage of known lamps is formed by the too high
temperatures of critical components. According to the invention,
therefore, it is suggested that the high-pressure discharge lamp is
provided at least partly with a reflection layer at least in a neck
region. The reflection layer reflects radiation in the entire spectrum
(ultraviolet, visible, infrared) and is used in particular as a heat
shield layer which reflects the radiation incident on the neck region at
the lamp end and acting as heat radiation, so that an additional heating
is prevented or at least reduced.
