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:
Jan. 06, 2009
Filed:
Aug. 14, 2007
Seung-hyuk Chang, Seongnam-si, KR;
I-hun Song, Seongnam-si, KR;
Won-joo Kim, Suwon-si, KR;
Suk-pil Kim, Yongin-si, KR;
Hoon Kim, Siheung-si, KR;
Seung-Hyuk Chang, Seongnam-si, KR;
I-Hun Song, Seongnam-si, KR;
Won-Joo Kim, Suwon-si, KR;
Suk-Pil Kim, Yongin-si, KR;
Hoon Kim, Siheung-si, KR;
Samsung Electronics Co., Ltd., Gyeonggi-do, KR;
Abstract
Off-axis projection optics that includes first and second mirrors positioned off-axis and sharing a confocal point that are arranged to reduce linear astigmatism. If a distance between an object plane and the first mirror is l, an incident angle of light coming from the object plane to the first mirror is i, a distance between the first mirror and the confocal point is l', a distance between the confocal point and the second mirror is l, an incident angle of light coming from the first mirror to the second mirror is i, and a distance between the second mirror and an image plane is l′, the off-axis projection optics may satisfy the following equation: