Patent ID: 6744693
Filing Date: 2004-06-01
Classification: F21V,F21W

Abstract:
A lighting fixture for projecting a beam of light and for use for spot lighting in connection with theater stages, cinema and television studios and the like, the fixture comprising:a light source arranged at one end of a housing having a light beam exit aperture at the opposite end thereof, the light source and aperture being arranged generally concentric with a longitudinal or optical axis of the housing; light beam influencing means comprising at least one beam-shaping blade that is adjustable to shape the periphery of a light beam emitted by the light source so as to form the light beam into a selected one of a plurality of geometric shapes, and a light influencing element selected from the group consisting of a lens, an iris, and a pattern or gobo, for influencing the light beam emitted by the light source and being arranged along the path of the light beam along said longitudinal axis through the housing from the light source to the aperture; and adjustment means operatively associated with each beam-shaping blade for adjusting the position of its associated beam-shaping blade relative to said longitudinal axis, each adjustment means comprising an annular body arranged with the axis thereof substantially coinciding with the longitudinal axis, and being arranged for rotation around said longitudinal axis and being connected to its associated beam-shaping blade such that rotation of the adjustment means around said longitudinal axis adjusts the position of the associated beam-shaping blade relative to said longitudinal axis.