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:
Jun. 15, 1982
Filed:
Jul. 28, 1980
William A Shelton, Cambridge, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
Photographic apparatus, e.g., a camera, having a synchronized flash. The camera includes a ranging system, an objective lens assembly movable between first and second positions for focusing an object at the camera's focal plane, a source of artificial illumination for illuminating the object, and a flash fire control in the form of an electronic flash initiation timer. The flash fire control receives an input from the ranging system which is representative of the camera-to-subject distance, and an input from the objective lens assembly upon its release for movement toward the second position. The flash fire control correlates these inputs so as to fire the source of artificial illumination while the lens assembly is still moving toward the second position and the object is in focus. In one embodiment, the intensity and/or the duration of the light from the artificial source of illumination is changed as a function of an exposure parameter, e.g., camera-to-subject distance.