초록 ▼

The disclosed stage lighting apparatus includes a constant-direction beam forming unit and an adjustable beam redirector for aiming the beam at a wide range of locations varying in azimuth and elevation, and programmable remote-control equipment for the various adjustments of the beam-forming unit a

The disclosed stage lighting apparatus includes a constant-direction beam forming unit and an adjustable beam redirector for aiming the beam at a wide range of locations varying in azimuth and elevation, and programmable remote-control equipment for the various adjustments of the beam-forming unit and the beam redirector. The beam-forming unit comprises a lamp and a heat-absorbing ellipsoidal reflector acting with the lamp to provide a beam; a heat-extracting filter in the path of the beam comprising a chamber containing circulated liquid that absorbs infra-red and a dichroic filter that reflects infra-red and is cooled by the circulated liquid of the chamber; an adjustable filter in the path of the beam comprising three elongated mutually overlapping subtractive color filters and a neutral brightness control filter, each filter having densities varying from clear to a maximum; an adjustable beam shaper; and adjustable beam-focussing lenses, all of which provides a constant-direction beam, the beam then being adjustably directed to the stage.

대표청구항 ▼

Stage lighting apparatus, including a beam former comprising a lamp that emits a spectrum of visible and infra-red light, a reflector about said lamp for projecting light from the lamp as a beam, and beam modifying devices for imparting desired characteristics to the beam including devices that are

Stage lighting apparatus, including a beam former comprising a lamp that emits a spectrum of visible and infra-red light, a reflector about said lamp for projecting light from the lamp as a beam, and beam modifying devices for imparting desired characteristics to the beam including devices that are vulnerable to damage by the infra-red content of a beam of light from the lamp, and infra-red filtering means including an infra-red filter disposed across the beam between the reflector and the beam modifying devices, said infra-red filter comprising a chamber having light-transmitting walls, a surface of the chamber facing the reflector bearing a dichroic layer that selectively passes visible light and reflects infra-red, said chamber being filled with liquid having the characteristics of selectively passing visible light and absorbing infra-red from the beam.