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:
Feb. 19, 2002
Filed:
Jul. 13, 2000
Robert E. Fischer, Westlake Village, CA (US);
Michael P. Newell, Thousand Oaks, CA (US);
Optics 1, Inc., Westlake Village, CA (US);
Abstract
A lens design form is used for a viewing optical system or magnifier that includes a cemented doublet and a weak aspheric element, for example, made of acrylic, and having a diffractive kinoform surface superimposed on the surface profile of the aspheric element. The design significantly reduces both chromatic aberrations and minimizes most of the monochromatic aberrations of the optical system or magnifier. By allowing the lens design form to produce an image on a curved surface, optical performance is improved further over the prior art systems because this allows the elements in the system to control the image blurring aberrations rather than having to also control field curvature. The human eye can accommodate for the curved field, and thus the curved field does not reduce image quality, but instead allows image quality to be enhanced. The viewing optical system also can be used for image projection.