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:
Oct. 28, 2003
Filed:
Jul. 02, 1997
Ronald K Kerschner, Loveland, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
The present invention is directed to an optical system for a scanning device. The optical system employs a catadioptric lens which both refracts and reflects the light passing through it. In this manner, the majority of the image path portion of the light beam may be folded within the lens. This enables the required optical path length to be achieved while providing a smaller, more compact physical envelope for the imaging assembly. The catadioptric lens achieves focusing of the light beam through the use of mirrored surfaces on the lens. Several refractive surfaces are also provided to correct for various aberrations, such as, for example, spherical aberration.