Abstract: A zoom optical system and automated luminaire are provided. The zoom optical system includes a light source and compensator, variator, and objective lens groups. The light source illuminates an object in an object plane. The compensator lens group is optically coupled to the object without intervening lenses, has a positive optical power, six lenses, and moves relative to the object plane. The variator lens group is optically coupled to the compensator lens group without intervening lenses, has a negative optical power, three lenses, and moves relative to the object plane and the compensator group. The objective lens group is optically coupled to the variator lens group without intervening lenses, has a second positive optical power, three lenses, remains in a fixed position relative to the object plane, and projects an image of the object without intervening lenses between the objective lens group and the projected image.

Abstract: An LED light engine and automated luminaire are provided. The LED light engine includes LED emitters, a first lens array, a color mixing module, second and third lens arrays, and a converging lens. The first lens array includes collimating lenslets corresponding to the LED emitters. The first lens array emits a plurality of light beams corresponding to the LED emitters. Each of the light beams includes substantially parallel light rays. The color mixing module includes dichroic filters that receive the light beams and emit corresponding filtered light beams. The second lens array includes converging lenslets that receive the filtered light beams. The third lens array includes other converging lenslets optically coupled to the second lens array. The converging lens is optically coupled to the third lens array. The second and third lens arrays and the converging lens illuminate a gate in an optical system with the filtered light beams.

Abstract: A color wheel for use in an automated luminaire includes a transparent substrate and a patterned dichroic filter coating on the transparent substrate. The pattern includes a first region and a second region. The first region includes unconnected coated dots, most of the coated dots having a substantially equal first size. The coated dots vary in density from a lower density at a first end of the first region to a higher density at a second end of the first region. The second region includes a contiguous dichroic filter coating that includes unconnected uncoated holes, most of the uncoated holes having a substantially equal second size. The uncoated holes vary in density from a higher density at a first end of the second region to a lower density at a second end of the second region. The first end of the second region abuts the second end of the first region.

Abstract: A zoom optical system and automated luminaire are provided. The zoom optical system includes a light source and compensator, variator, and objective lens groups. The light source illuminates an object in an object plane. The compensator lens group is optically coupled to the object without intervening lenses, has a positive optical power, six lenses, and moves relative to the object plane. The variator lens group is optically coupled to the compensator lens group without intervening lenses, has a negative optical power, three lenses, and moves relative to the object plane and the compensator group. The objective lens group is optically coupled to the variator lens group without intervening lenses, has a second positive optical power, three lenses, remains in a fixed position relative to the object plane, and projects an image of the object without intervening lenses between the objective lens group and the projected image.

Abstract: A zoom optical system and automated luminaire are provided. The zoom optical system includes a light source, a compensator lens group, a variator lens group, and an objective lens group. The light source illuminates an object located in an object plane. The compensator lens group is optically coupled to the object, has a first positive optical power, and moves relative to the object plane. The variator lens group is optically coupled to the compensator lens group, has a negative optical power, and moves relative to the object plane and the compensator group. The objective lens group is optically coupled to the variator lens group, has a second positive optical power, remains in a fixed position relative to the object plane, and projects an image of the object.

Abstract: A luminaire is provided that includes a light source comprising at least one light-emitting diode (LED) and a coated lens. The coated lens includes a lens comprising a plastic material and a coating configured to reduce a susceptibility of the lens to scratching, to reduce a buildup of static electricity on the surface of the lens, and to reduce cracking of the lens coating from thermal cycling of the lens.