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:
May. 25, 1982
Filed:
Aug. 11, 1980
Scott A Brownstein, Rochester, NY (US);
Carl N Schauffele, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A quenchable electronic strobe flash unit has a light-responsive integrating circuit for causing the light emitted by a flashtube to be terminated when the integrating circuit senses a predetermined amount of light. A light-level sensing circuit measures the intensity of the ambient light. A threshold-setting circuit, responsive to the sensing circuit, causes the amount of light needed to be sensed by the integrating circuit for terminating the flash in bright ambient light to be, for example, twenty-five percent of the amount of light required to be sensed for terminating the flash in low ambient light. Thus, for subjects within the maximum range of the flash, when ambient light is relatively low, a desired exposure is due primarily to flash light, and when ambient light is relatively high, a selected portion of the desired exposure is attributable to flash light which is, for example, twenty-five percent of the full-flash light output.