US Patent 7102980 Optical pickup apparatus and objective lens
Patent 7102980 was granted and assigned to Konica on September, 2006 by the United States Patent and Trademark Office.
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Patent abstract
An objective lens of an optical pickup apparatus converges a divergent light flux onto an information recording surface. The following conditional formula is satisfied:|δSA1/δU|·|δU|+|δSA2/δT|·|δT|≦0.07 λrmswhere λ represents a wavelength of a light source, δSA1/δU represents a change of a spherical aberration for an object-to-image distance change δU (|δU|≦0.5 mm) and δSA2/δT represents a change of spherical aberration for a temperature change δT (|δT|≦30° C.), the object-to-image distance is a distance between the light source (a light emitting point) and the information recording surface.
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US Patent 07102980 Optical pickup apparatus and objective lens US Patent 7102980 Optical pickup apparatus and objective lens
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Patent Number
0710298000
Patent Number
710298000
Edits on 28 Apr, 2023
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
071029800
Date of Patent
September 5, 2006
0Patent Application Number
099836820
Date Filed
October 25, 2001
0Official Website
Patent Primary Examiner
0
Edits on 26 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
071029800
Date of Patent
September 5, 2006
0Patent Application Number
099836820
Date Filed
October 25, 2001
0Official Website
Patent Primary Examiner
0
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US Patent 07102980 Optical pickup apparatus and objective lens
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07102980
Date of patent
September 5, 2006
Patent application number
09983682
Date Filed
October 25, 2001
Patent primary examiner
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