Invention Grant
- Patent Title: Manufacturing method of discharge lamp electrode
- Patent Title (中): 放电灯电极的制造方法
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Application No.: US713225Application Date: 1991-06-11
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Publication No.: US5186671APublication Date: 1993-02-16
- Inventor: Masakazu Nagasawa , Masami Handa , Kunio Fukai , Yasuo Hirozumi
- Applicant: Masakazu Nagasawa , Masami Handa , Kunio Fukai , Yasuo Hirozumi
- Applicant Address: JPX Tokyo
- Assignee: Koito Manufacturing Co., Ltd.
- Current Assignee: Koito Manufacturing Co., Ltd.
- Current Assignee Address: JPX Tokyo
- Priority: JPX2-155069 19900615
- Main IPC: B23K26/00
- IPC: B23K26/00 ; H01J9/02 ; H01J61/073
Abstract:
A discharge lamp electrode having a spherical end portion which serves as a discharge part and has a diameter larger than the remaining base part is formed by simultaneously applying a plurality of laser beams to one end portion of a rod-shaped material of tungsten or tungsten alloy in different directions. Preferably, the rod-shaped material is held vertically while the laser beams are applied to its lower end portion.
Public/Granted literature
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