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:
Nov. 07, 2000
Filed:
May. 07, 1999
Charles J Koester, Glen Rock, NJ (US);
Other;
Abstract
Variable focus lens assembly, including a first lens group with positive optical power, a second lens group with positive optical power, and an adjuster structured to be capable of adjusting a separation between the first lens group and the second lens group. The variable focus lens assembly has a numerical aperture greater than about 0.65. A variable focus lens assembly includes a first lens group that is moveable on an axis, the first lens group being well-corrected and having a numerical aperture of at least about 0.20, and a second, fixed lens group sharing the axis of the first lens group. A distance between the first lens group and the second lens group may be varied over a range. The variable focus lens assembly has a spot size which is diffraction limited over the range of distance separating the first lens group and the second lens group. The variable focus lens assembly has a numerical aperture of at least about 0.65. Methods for examining or treating one of a transparent and a semi-transparent object with a variable focus lens assembly.