Strobe flashing device
First Claim
1. A strobe flashing device, comprising a cylindrical strobe light emitting tube and a condenser lens for gathering light beams emitted from said strobe light emitting tube, wherein,said condenser lens is provided on one side face with a first cylindrical lens which gathers said light beams only in a direction that is parallel with a longitudinal axis of said strobe light emitting tube, and on a second side face with a second cylindrical lens which gathers light beams that are only in a direction that is perpendicular to said longitudinal axis of said strobe light emitting tube,at least one of said cylindrical lenses on opposite side faces of said condensed lens being planar at a center portion thereof.
1 Assignment
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Accused Products
Abstract
A strobe flashing device having a cylindrical strobe light emitting tube and a condenser lens for gathering light beams emitted from the strobe light emitting tube. The condenser lens is provided on one side face with a first cylindrical lens which gathers light beams only in a direction that is parallel with the longitudinal axis of the strobe light emitting tube. A second side face of the condenser lens is provided with a second cylindrical lens which gathers light beams only in a direction that is perpendicular to a longitudinal axis of the strobe light emitting tube. At least one of the cylindrical lenses on the side faces of the condenser lens is made planar at a center portion thereof. The cylindrical lenses can be a modified cylindrical lenses having different lens curvatures that vary in accordance with an image height from a center thereof.
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Citations
13 Claims
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1. A strobe flashing device, comprising a cylindrical strobe light emitting tube and a condenser lens for gathering light beams emitted from said strobe light emitting tube, wherein,
said condenser lens is provided on one side face with a first cylindrical lens which gathers said light beams only in a direction that is parallel with a longitudinal axis of said strobe light emitting tube, and on a second side face with a second cylindrical lens which gathers light beams that are only in a direction that is perpendicular to said longitudinal axis of said strobe light emitting tube, at least one of said cylindrical lenses on opposite side faces of said condensed lens being planar at a center portion thereof.
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10. A strobe flashing device, comprising:
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a cylindrical strobe light emitting tube; and
,a condenser lens for gathering light beams emitted from said strobe light emitting tube, wherein said condenser lens is provided on its opposite side faces with first and second cylindrical Fresnel lenses which gathers said light beams in two orthogonal directions, at least one of said cylindrical Fresnel lenses on said opposite side faces of said condenser lens having a planar center portion which does not gather said light beams.
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11. A strobe flashing device, comprising a cylindrical strobe light emitting tube and a condenser lens for gathering light beams emitted from said strobe light emitting tube, wherein,
said condenser lens is provided on one side face with a modified cylindrical lens which gathers said light beams that are only in a direction that is parallel with a longitudinal axis of said strobe light emitting tube, a second side face having a modified cylindrical lens which gathers said light beams that are only in a direction that is perpendicular to a longitudinal axis of said strobe light emitting tube.
Specification