1
Lorne A Whitehead: Concentrating heliostat for solar lighting applications. The University of British Columbia, Oyen Wiggs Green & Mutala, February 15, 2000: US06025583 (37 worldwide citation)

An optical system for variably re-directing light (preferably sunlight) which passes through an input aperture. The input aperture is covered with a flexible optical film such as a Fresnel lens having an optical deflection characteristic which varies as a function of position so as to redirect the l ...


2
Whitehead Lorne A: Concentrating heliostat for solar lighting applications. The University Of British Columbia, WIGGS Blake R, August 16, 2001: WO/2001/059361

An optical system for variably re-directing light (10, 80, 150, 190) (preferably sunlight) which passes through an input aperture. The input aperture (20) is covered with a flexible optical film (90, 200, 320) such as a Fresnellens having an optical deflection characteristic which varies as a functi ...



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