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Explanation: - 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.
Explanation: Noun 1. strobe - scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary
اذن هو جزء لازم لتصوير اهداف متحركة و جعلها تظهر كالثابتة
The translation workplace 
