Photoionization detector lamp and its method of manufacture
AssigneeHoneywell International Inc.
InventorsChuang Huang, Qingling Wang
Life of this patent
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Abstract
Embodiments are provided for ultraviolet lamps for use in photoionization detectors and methods of manufacturing same. An example method of manufacturing an ultraviolet lamp includes providing a glass tube, the glass tube defining a first end; applying a mixed powder coating composition onto an edge surface of the first end of the glass tube, the mixed powder coating composition comprising indium powder and glass powder; applying a glass powder coating composition over the mixed powder coating composition; attaching a crystal window to the edge surface of the first end of the glass tube; and heating the glass tube and the crystal window to seal the crystal window to the glass tube.
Claims20
A method of manufacturing a vacuum ultraviolet lamp, the method comprising:
- providing a glass tube, the glass tube defining a first end;
- applying a mixed powder coating composition onto an edge surface of the first end of the glass tube, the mixed powder coating composition comprising indium powder and glass powder;
- applying a glass powder coating composition over the mixed powder coating composition;
- attaching a crystal window to the edge surface of the first end of the glass tube;
- and
- heating the glass tube and the crystal window to seal the crystal window to the glass tube.
A vacuum ultraviolet lamp comprising:
- a glass tube, the glass tube defining a first end;
- a crystal window sealed to the first end of the glass tube, wherein sealing the crystal window to the first end of the glass tube comprises:
- applying a mixed powder coating composition onto an edge surface of the first end of the glass tube, the mixed powder coating composition comprising indium powder and glass powder;
- applying a glass powder coating composition over the mixed powder coating composition;
- attaching the crystal window to the edge surface of the first end of the glass tube;
- and
- heating the glass tube and the crystal window to seal the crystal window to the glass tube.
A photoionization detector comprising:
- two electrodes;
- and
- a vacuum ultraviolet lamp comprising:
- a glass tube, the glass tube defining a first end;
- a crystal window sealed to the first end of the glass tube, wherein sealing the crystal window to the first end of the glass tube comprises:
- applying a mixed powder coating composition onto an edge surface of the first end of the glass tube, the mixed powder coating composition comprising indium powder and glass powder;
- applying a glass powder coating composition over the mixed powder coating composition;
- attaching the crystal window to the edge surface of the first end of the glass tube;
- and
- heating the glass tube and the crystal window to seal the crystal window to the glass tube.
Dependencies are inferred from the claim text.