| 摘要 |
A lamp assembly having a reflector ( 102 ) holding a lamp element, or burner ( 104 ). The reflector ( 102 ) typically is an ellipse, with the burner arc positioned at one foci of the ellipse. A reflector extension ( 108 ) is designed to mate to the reflector ( 102 ). The reflector extension ( 108 ) has a first open end toward the reflector ( 102 ). The first open end typically is in contact with the reflector ( 102 ) to form a seal around the perimeter preventing glass shards from escaping between the reflector ( 102 ) and reflector extension ( 108 ). Preferably, the reflector extension ( 108 ) contacts the reflector ( 102 ) around the perimeter of the reflector ( 102 ). The second end of the reflector extension ( 108 ) also is open to allow the light from the arc to exit the reflector extension ( 108 ). A transparent plate ( 110 ) placed across this second open end prevents glass from leaving the reflector extension ( 108 ). The transparent plate ( 110 ) typically is glass, and may have an antireflective coating applied to the plate to limit the light reflected by the plate ( 110 ). Two or more ventilation ports ( 112 ) in the reflector extension ( 108 ) allow cooling airflow into the cavity around the burner ( 104 ). These ventilation ports alternatively are a series of small holes or slots in the reflector extension ( 108 ).
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