The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2009
Filed:
May. 15, 2007
Jang-hoon Yoo, Seoul, KR;
Dong-ho Shin, Yongin-si, KR;
Soo-han Park, Yongin-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
An object lens arranged on a light proceeding path to focus light on a recording medium includes a first surface that is an incident surface on which light is incident, a second surface from which light exits to be focused on the recording medium, and a diffractive optical element disposed on at least one of the first and second surfaces and which has a refractivity of f/f<5, fbeing a focus distance of the diffractive optical element and f being a focal distance of the object lens. The object lens has a numerical aperture of 0.75 or greater.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile