US Patent 7319558 Wide-band wave plate and a controlling method thereof

Patent 7319558 was granted and assigned to Konica Minolta Holdings on January, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Konica Minolta Holdings

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73195580

Date of Patent

January 15, 2008

Patent Application Number

113609470

Date Filed

February 23, 2006

Patent Primary Examiner

‌

Stephone B. Allen

Patent abstract

A wide-band wave plate having at least two wave plates, each of which has a microstructure to generate a phase difference, the microstructure having a cycle not shorter than 1/nmin of a shortest wavelength of light in use, wherein the two wave plates are arranged to face opposite with their main axes in non-parallel with each other, wherein nmin is a refractive index of a wave plate material with respect to the shortest wavelength.