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:
Mar. 17, 1998
Filed:
Jan. 21, 1997
Jean F Depatie, Albion, NY (US);
James A Schmieder, Wayland, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An aperture mechanism for controlling the aperture of an optical system includes a flexible diaphragm having an opening at its center for forming a first aperture value for the optical system and means for stretching the diaphragm to enlarge the opening and form at least one additional aperture value for the optical system. A stepper motor is used to stretch the diaphragm to form a plurality of aperture values for the optical system. Because the size of the aperture is determined by how much the diaphragm is stretched, the backlash between the stepper motor and related gearing is kept to a minimum due to the elastic properties of the diaphragm, which provides economical and accurate control of very small apertures.