US Patent 7321473 Aperture and projection lens system
Patent 7321473 was granted and assigned to Coretronic on January, 2008 by the United States Patent and Trademark Office.
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Patent abstract
An aperture comprising a round filter portion and at least one annular filter portion is provided. The round filter portion and the annular filter portion are forming a round zone. A transmission wavelength range of the round filter portion is larger than a transmission wavelength range of the annular filter portion. A projection lens system with the aperture can produce images having higher brightness of the images and better image quality.
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US Patent 07321473 Aperture and projection lens system US Patent 7321473 Aperture and projection lens system
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Patent Number
0732147300
Patent Number
732147300
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Official Website
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
073214730
Date of Patent
January 22, 2008
0Patent Application Number
111640230
Date Filed
November 8, 2005
0Official Website
Patent Primary Examiner
Edits on 25 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
073214730
Date of Patent
January 22, 2008
0Patent Application Number
111640230
Date Filed
November 8, 2005
0Official Website
Patent Primary Examiner
Edits on 17 Jun, 2022
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US Patent 07321473 Aperture and projection lens system
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07321473
Date of patent
January 22, 2008
Patent application number
11164023
Date Filed
November 8, 2005
Patent primary examiner
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