Development of flying spot illumination system for stage lighting

Hisashi Asakawa; Katsunori Ishii; Hikari Koshiro; Junko Baba; Moriaki Wakaki

doi:10.1117/12.2038147

25 February 2014 Development of flying spot illumination system for stage lighting

Hisashi Asakawa, Katsunori Ishii, Hikari Koshiro, Junko Baba, Moriaki Wakaki

Proceedings Volume 9005, Advances in Display Technologies IV; 90050H (2014) https://doi.org/10.1117/12.2038147
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

The system to control the area of illumination is important for the luminaires used for stages and TV studios. Presently the methods to change the distance between a lamp and lenses, or to use a zooming projection of the aperture illuminated by the lamp are used to control the area. However, these methods require many optical components or mechanical components. Moreover, the energy of the light source is partially consumed by the absorption of the shutter on adjusting the illumination area. On the other hand, the control of the illuminance over the illuminated area is not possible by the methods. In this study, we developed the lighting system which enables to control both the illuminated area and the illuminance distribution within the area by scanning the beam from a LED array light source. The area of illumination was expanded along one dimension by scanning the LED beam using a rotating polygon mirror. The selection of the illuminated width and the control of the illuminance distribution were achieved by synchronizing the pulse width modulation (PWM) control of the LED with the rotation of the mirror using a time sharing control. As a result, various illuminance distributions can be realized at real time by using software control for the luminaire. The developed system has the merits of compact and high efficiency.

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Hisashi Asakawa, Katsunori Ishii, Hikari Koshiro, Junko Baba, and Moriaki Wakaki "Development of flying spot illumination system for stage lighting", Proc. SPIE 9005, Advances in Display Technologies IV, 90050H (25 February 2014); https://doi.org/10.1117/12.2038147

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KEYWORDS

Light emitting diodes

Control systems

Light sources and illumination

Mirrors

Light sources

Light

Camera shutters

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