HIGH PRESSURE DISCHARGE LAMP AND LIGHTING METHOD THEREOF

摘要

The present high-pressure discharge lamp is composed of an arc tube part having an internal space, a pair of tungsten electrodes disposed in opposition to each other within the internal space, and mercury and halogen encapsulated in the internal space. The halogen is excessively encapsulated into the internal space relatively to the capacity of the internal space so as to establish an appropriate halogen cycle when the mercury partially deposits without evaporating.

主权项

1. A high-pressure discharge lamp including an arc tube part having an internal space, a pair of tungsten electrodes disposed in opposition to each other within the internal space, and mercury and halogen encapsulated into the internal space, wherein
a portion of the mercury is present as a deposit within the internal space without evaporating when the lamp is lit, and the halogen is present in the internal space relatively to a capacity of the internal space so as to establish a halogen cycle when the mercury is deposited within the internal space without evaporating.