US Patent 7385760 Optical element and optical pickup device used therewith

Patent 7385760 was granted and assigned to Konica Minolta on June, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Konica Minolta

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7385760

Date of Patent

June 10, 2008

Patent Application Number

11287798

Date Filed

November 28, 2005

Patent Primary Examiner

‌

Stephone B. Allen

Patent abstract

An optical element for reflecting light has a substrate and a thin film formed on the substrate. The thin film reflects light in a predetermined reflection wavelength band so that the thin film adjusts a difference in phase differences between a P-polarized light component and S-polarized light component of an incident light to the thin film and between P-polarized light component and S-polarized light component of the reflected light to 180°±10° at an absolute value.