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US 6,885,134 B2Granted
Light source
AssigneeHamamatsu Photonics K.K.
InventorsTatsuo Kurashima, Keiji Suyama, Nobuharu Harada, Kouji Makino
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AssigneeHamamatsu Photonics K.K.
InventorsTatsuo Kurashima, Keiji Suyama, Nobuharu Harada, Kouji Makino
Estimating the term…
In a light source, a heat sink is in contact with a side-on type discharge tube 110. The heat sink is in contact with a peripheral region 110ws around an exit window 101ww of the discharge tube 110. The heat sink consists of a spring member 101sp kept in direct contact with the peripheral region 101ws, and a radiating block 101bl which connects the spring member 101sp to a radiator box 101bx. Since materials made by sputtering or the like of electrodes in the discharge tube 110 mostly attach to the peripheral region 101ws of side wall 101w, it is feasible to decrease the amount of materials attaching to the exit window 101ww and, in turn, lengthen the lifetime of the discharge tube. Another light source may be constructed in structure in which the heat sink is in contact with a head-on type discharge tube or in structure in which light is outputted from a projecting portion.
A light source comprising a discharge tube in which a gas is sealed in an envelope having a cylindrical side wall of glass and in which discharge is induced between a pair of electrodes placed inside the envelope, to emit light from the gas between the electrodes and output the light through an exit window of the side wall to the outside, wherein a heat sink having an opening surrounding the optical axis of the light outputted through said exit window is in contact with a glass surface of a peripheral region around said exit window.
A light source comprising a discharge tube in which a gas is sealed in an envelope and in which discharge is induced between a pair of electrodes placed inside said envelope, to emit light from the gas between the electrodes and output the light through an exit window located in a top region of said envelope, to the outside, wherein a heat sink is in contact with a surface of a peripheral region around said exit window, and wherein said heat sink is in contact with said envelope so that said peripheral region is located at least in the top region of said envelope.
A light source comprising a discharge tube in which a gas is sealed in an envelope of glass and in which discharge is induced between a pair of electrodes placed inside said envelope, to emit light from the gas between said electrodes and output the light through an exit window located at a distal end of a projecting portion communicating with a predetermined portion of said envelope, to the outside, wherein a heat sink having an opening surrounding the optical axis of the light outputted through said exit window is in contact with a peripheral region around said predetermined portion or a glass surface except for said exit window of said projecting portion.
Dependencies are inferred from the claim text.