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. 30, 2001
Filed:
Jul. 15, 1999
Koji Okajima, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an imaging lens unit configured of two lenses, the deterioration of the optical performance due to the eccentricity is suppressed for an improved assembling property, while at the same time correcting the various aberrations in satisfactory manner. A meniscus first lens (L,) having a weak refracting power, and a meniscus second lens (L,) having positive refracting power with the convex surface thereof directed toward the image surface are arranged sequentially from the object side toward the image surface (IMG). The conditions f,/f>0.9 and nd,>1.55 are met, where f is the focal length of the whole lens system, f,the focal length of the second lens, and nd,the refractive index on the d line of the second lens.