The present disclosure generally relates to automated luminaire(s), specifically to a beam shaper for use with an automated luminaire(s).
Luminaires with automated and remotely controllable functionality are well known in the entertainment and architectural lighting markets. Such products are commonly used in theatres, television studios, concerts, theme parks, night clubs, and other venues. A typical product will commonly provide control over the pan and tilt functions of the luminaire allowing the operator to control the direction the luminaire is pointing and thus the position of the light beam on the stage or in the studio. Typically, this position control is done via control of the luminaire's position in two orthogonal rotational axes usually referred to as pan and tilt. Many products provide control over other parameters such as the intensity, color, focus, beam size, beam shape, and beam pattern. The beam pattern is often provided by a stencil or slide called a gobo which may be a steel, aluminum, or etched glass pattern. The products manufactured by Robe Show Lighting such as the ColorSpot 700E are typical of the art.
The optical systems of such luminaires may include a beam shaping optical element through which the light is constrained to pass. A beam shaping element may comprise an asymmetric or lenticular lens or collection of lenses that constrain a light beam that is symmetrical and circular in cross section to one that is asymmetrical and predominantly elliptical or rectangular in cross section. A prior art automated luminaire may contain a plurality of such beam shapers each of which may have a greater or lesser effect on the light beam and that may be overlapped to produce a composite effect. For example a weak beam shaper may constrain a circular beam that has a symmetrical beam angle of 20° in all directions into a primarily elliptical beam that has a major axis of 30° and a minor axis of 15°. A more powerful beam shaper may constrain a circular beam that has a symmetrical beam angle of 20° in all directions into a primarily elliptical beam that has a major axis of 40° and a minor axis of 100. It is also common in prior art luminaires to provide the ability to rotate the beam shaper along the optical axis such that the resultant symmetrical elliptical beam may also be rotated. U.S. Pat. Nos. 5,665,305; 5,758,955; 5,980,066; and 6,048,080 disclose such a system where a plurality of discrete lens elements is used to control the shape of a light beam.
Prior art beam shapers often require installation internally within the luminaire and are not suitable for optical systems where an array of a number of discrete emitters, such as Light Emitting Diodes (LEDs), is used to produce the beam. Instead they rely on the optical path having a focus point that is small compared to the overall diameter of the beam in which the beam shaping can be situated.
There is a need for an improved beam shaper mechanism for automated luminaires that is simple to install or remove from a luminaire, which provides the ability to smoothly and continuously adjust the angle of eccentricity of the constrained light beam for a light beam produced by an array of discrete emitters such as LEDs.
For a more complete understanding of the present disclosure and the advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals indicate like features and wherein:
Preferred embodiments of the present disclosure are illustrated in the FIGUREs, like numerals being used to refer to like and corresponding parts of the various drawings.
The present disclosure generally relates to an automated luminaire, specifically to the configuration of a beam shaper within such a luminaire such that it provides the ability to adjust the size or eccentricity of the constrained light beam.
In an alternative embodiment (not shown) the beam shaper 24 could be a portion of a disc instead of a full disc so that it only covers and affects a portion of the LEDs.
It should be appreciated that in any cases where articulation of elements is called for herein but not shown, it is well within the known art to provide a variety of mechanisms that can achieve these necessary articulations.
While the disclosure has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments may be devised which do not depart from the scope of the disclosure as disclosed herein. The disclosure has been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the disclosure.
This application is a U.S. National Stage of International Patent Application No. PCT/US13/32850 filed Mar. 18, 2013 which claims priority to U.S. Provisional Application No. 61/612,374 filed on Mar. 18, 2012.
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PCT/US2013/032850 | 3/18/2013 | WO | 00 |
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WO2013/142436 | 9/26/2013 | WO | A |
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Number | Date | Country | |
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20190170330 A1 | Jun 2019 | US |
Number | Date | Country | |
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61612374 | Mar 2012 | US |