Photoflash unit having light-refractive prisms
AssigneeGeneral Electric Company
InventorDonald R. Schindler
Life of this patent
Estimating the term…
Abstract
A photoflash unit having one or more flash lamps, and a transparent cover in front of the flash lamps which is provided with elongated light-refractive prisms in front of each flash lamp so as to refract directly radiated light from the lamp when flashed in a more frontward direction and into the area to be illuminated. Prisms may be provided on both sides of the cover.
Claims22
A photoflash unit comprising an elongated flash lamp which when flashed emits light over a wider angle than the viewing angle of a normal camera lens, a reflector having reflective areas laterally flanking said lamp, and first two or more elongated prism means symmetrically positioned directly in front of said lamp and parallel to the axis thereof, and a second two or more elongated prism means symmetrically positioned directly in front of said lamp and perpendicular to the axis thereof, each of said first and second prism means being shaped for refracting and coverging light emanating directly from said lamp when flashed in a more frontward direction and into said viewing angle of the camera lens so as to increase the brightness substantially uniformly within said viewing angle. .
A photoflash unit comprising an elongated flash lamp which when flashed emits light over a wider angle than the viewing angle of a normal camera lens, a reflector having spectral reflective areas laterally flanking said lamp and shaped to reflect light from said lamp when flashed in a desired pattern, and two or more elongated prism means symmetrically positioned directly in front of said lamp and parallel to the axis thereof, said prism means being shaped for refracting and converging light emanating directly from said lamp when flashed in a more frontward direction and into said viewing angle of the camera lens so as to increase the brightness substantially uniformly within said viewing angle, there being no prism means parallel to said lamp axis directly in front of said reflective areas of the reflector.
A photoflash unit comprising an elongated flash lamp which when flashed emits light over a wider angle than the viewing angle of a normal camera lens, a reflector having nonspectral reflective areas laterally flanking said lamp, and two or more elongated prism means symmetrically positioned directly in front of said lamp and parallel to the axis thereof, said prism means being shaped for refracting and converging light emanating directly from said lamp when flashing in a more frontward direction and into said viewing angle of the camera lens so as to increase the brightness substantially uniformly within said viewing angle.
Dependencies are inferred from the claim text.