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:
Feb. 10, 1998
Filed:
Feb. 18, 1997
David R Dowe, Holley, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An exposure apparatus for flash illuminating a subject is disclosed. The exposure apparatus includes a main flash tube for directly illuminating the subject, a bounce flash tube for indirectly illuminating the subject, and sensing circuitry responsive to ambient scene illumination for producing an ambient scene illumination signal, and responsive to light from the main flash tube reflected from the subject for producing a reflected flash illumination signal. The exposure apparatus further includes circuitry for defining a first reference voltage signal corresponding to a predetermined scene illumination level, circuitry for defining a second reference voltage signal corresponding to a predetermined reflected flash illumination level, first voltage comparator circuitry responsive to the ambient scene illumination signal and the first reference voltage signal for producing a main flash signal to energize the main flash tube when the ambient scene illumination signal is below the predetermined ambient scene illumination level, and second voltage comparator circuitry responsive to the reflected flash illumination signal and the second reference voltage signal for producing a bounce flash signal to energize the bounce flash tube and deenergize the main flash tube when the reflected flash illumination signal is above the predetermined reflected flash illumination level.