Energy-saving electronic flash apparatus
AssigneeEastman Kodak Company
InventorDonald M. Harvey
Life of this patent
Estimating the term…
Abstract
An energy-saving electronic flash unit for a rapid sequence of flash exposures includes status indicator apparatus operable for signaling the readiness of the flash unit for the next flash in the sequence as a function of the flash energy expended to produce the previous flash. When the energy retained by a flash-firing capacitor at the termination of the preceding flash exceeds the energy expended in producing that flash, energy-monitoring circuitry causes a status indicator device to signal that the flash unit is sufficiently charged for the next exposure in the sequence.
Claims7
In electronic flash apparatus having energy-saving quench means actuatable for terminating the discharging of energy from an energy-storage capacitor to quench said flash apparatus, the improvement comprising:
- energy-monitoring means, arranged for the measuring of energy resulting from the discharging of said capacitor for a flash-firing operation, for measuring the energy discharged relative to the energy retained by said capacitor at the termination of such flash-firing operation, to determine whether or not said capacitor retains adequate energy to produce an acceptable flash exposure of a subsequent scene under substantially the same exposure conditions as existed for the preceding flash exposure operation.
Dependencies are inferred from the claim text.