Patent ID: 7372201

Claim:
A sub-miniature arc lamp comprising: a sapphire body having a first end and a second end, the first end being coupled to a first cap and the second end being coupled to a second cap to define a sealed envelope; a first electrode comprising a first rod having a first end and a second end, the first end being mounted in the first cap, the first electrode further defining a ridge near the second end; a second electrode comprising a second rod having a first end and a second end, the first end of the second rod being mounted in the second cap; a first set of one or more getters, each of the one or more getters comprising a disc having a cavity defined substantially at a center of the disc and the first rod of the first electrode passing through the cavity such that the getter is mounted on the first rod between the first and the second ends of the first rod; and a retainer ring mounted at the ridge near the second end of the first electrode to hold the one or more getters in place.