Ceramic arc tubes with reduced surface scatter and related methods
First Claim
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1. A method comprising:
- polishing concurrently an inner surface and an outer surface of a ceramic arc tube to decrease surface scatter of the arc tube and increase in-line light transmission through the ceramic arc tube.
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Abstract
A method for polishing of a ceramic arc tube for use in a HID lamp in order to decrease surface scatter and increase in-line transmission of light through the arc tube. In accordance with one embodiment of the invention, processes are described by which both the inner surface and outer surface of a ceramic arc tube may be polished concurrently. In one embodiment, the ceramic arc tube may be immersed in an abrasive slurry and impacted with the abrasive slurry through generation of a turbulence in the abrasive slurry, for example. In one embodiment, the turbulence may be generated by ultrasonic cavitation within the slurry or by a magnetically induced rotational flow within the slurry.
21 Citations
25 Claims
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1. A method comprising:
polishing concurrently an inner surface and an outer surface of a ceramic arc tube to decrease surface scatter of the arc tube and increase in-line light transmission through the ceramic arc tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of polishing a ceramic arc tube comprising:
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immersing the arc tube in a slurry comprising suspended abrasive particles; and
generating a turbulence within the slurry such that the abrasive particles are impacted against the inner surface and outer surface of the ceramic arc tube responsive to the turbulence. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification