Dust-proof device for solid integration rod in projecting apparatus
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United States of America Patent
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Jul 2, 2002
Grant Date -
N/A
app pub date -
Nov 22, 2000
filing date -
Oct 24, 2000
priority date (Note) -
Expired
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Abstract
A dust-proof device for a solid integration rod in projecting apparatuses is provided in the invention. The solid integration rod has a layer of metal reflecting film with a certain length in axial direction. The layer of metal reflecting film is coated on the circumferential outer surface at an end of the solid integration rod that is adhered to the dust-proof element of the dust-proof device. The metal reflecting film is provided so that if a flared portion of the adhesive occurs after the dust-proof device is adhered to the solid integration rod, the metal film will still reflect the light normally, and the light energy will not be lost through the flare portion.
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