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:
Jul. 17, 2007
Filed:
Sep. 07, 2006
Hyung-soo Kim, Suwon, KR;
Hyung-soo Kim, Suwon, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A temperature-compensated collimating lens provided of a single piece of lens, which does not have variation in its focal distance due to temperature changes, and an optical scanning apparatus using the same. The collimating lens to transform a ray of light from a light source into approximate parallel rays. The collimating lens is provided a single lens of plastic, and the single lens has a refraction surface provided on one side and a diffraction surface provided on the other side. The refraction surface and the diffraction surface have predetermined powers to prevent power of the collimating lens from changing due to change in temperature. The refraction surface and the diffraction surface have a power to satisfy the condition of,