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. 13, 2015
Filed:
Dec. 15, 2014
Paul J. Wehrenberg, Palo Alto, CA (US);
Paul J. Wehrenberg, Palo Alto, CA (US);
Other;
Abstract
Apparatus and methods for a two-lens optical system having a focal length that can be readily switched between a first focal length and a second focal length. The system includes first and second multi-element lenses, each of which includes a cavity for a fluid. The first lens has the first focal length in the absence of the fluid in its cavity and the second focal length when the fluid is present in its cavity. The second lens has the second focal length in the absence of the fluid in its cavity and the first focal length when the fluid is present in its cavity. The focal length of the optical system is controlled by controlling which cavity of the two lenses contains the fluid.