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. 24, 1998
Filed:
Mar. 20, 1997
Eric Rosow, Avon, CT (US);
Finton Beatrice, Vernon, CT (US);
Hartford Hospital, Hartford, CT (US);
Abstract
In a method and apparatus for performing an MTF test on endoscopes, a beam of light is filtered through a sinusoidally-varying medium defining a transmittance which is approximately uniform along a first direction within the medium, and which varies sinusoidally along a second direction within the medium thereby generating a beam defining an intensity which varies sinusoidally in a predetermined direction. The filtered beam is transmitted through an endoscope from a first end through a second end of the endoscope, and a video system generates signals indicative of the optical intensity of the transmitted beam at each of a plurality of predetermined locations within the beam. Noise is filtered from the intensity signals, and the filtered intensity signals are in turn used in determining the MTF at each of a plurality of predetermined locations within the beam, thereby providing an indication of the optical performance characteristics of the endoscope.