| CPC F21S 2/005 (2013.01) [F21V 5/007 (2013.01); F21V 7/0083 (2013.01); F21V 7/0091 (2013.01); F21V 17/164 (2013.01); F21Y 2105/18 (2016.08); F21Y 2115/10 (2016.08)] | 23 Claims |
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1. An optical cell for forming a luminaire, the optical cell comprising:
(i) a light collector element,
(ii) a cover element attached to the light collector element, and
(iii) a transmission element mounted between the light collector element and the cover element;
wherein:
(iv) the light collector element comprises a body including:
an input for receiving and collecting light from at least one light source,
an output for propagating collected light towards the transmission element,
at least one wall defining one or more portions of the body between its input and output and configured for collecting light entering the body via its input and conveying or directing said light towards its output, and
attachment means for mechanically attaching the body of the light collector element to the cover element and securing the transmission element between the light collector element and the cover element;
(v) the cover element comprises:
an input opening facing towards the transmission element and for receiving light transmitted by the transmission element,
an output opening via which light is outputted from the optical cell, and
at least one internal surface defining a cavity within the cover element between its input and output openings, the cavity's internal surface(s) being configured for allowing or effecting passage of light, or a portion of the light, through the cavity from the cover element's input opening towards its output opening;
(vi) the transmission element comprises:
one or more planar optical elements,
wherein the or each optical element includes a first surface facing towards the output of the light collector element and a second surface facing towards the input opening of the cover element,
and the or each optical element exhibits a predetermined optical activity or function in its transmission of light incident thereon which has exited the output of the light collector element and is transmitted by the transmission element towards the input opening of the cover element;
and wherein:
(vii) the transmission element comprises at least one optically active transmission optical element in the form of a generally flat or planar foil, film, sheet, web, plate, layer or other thin body of optical material exhibiting a desired optical function which effects or facilitates a desired distribution and/or one or more output characteristics of light emanating from the optical cell, by modifying or modulating one or more optical properties of the light emitted by the light source(s) as determined by the optical function of the optically active transmission element of the optical cell,
wherein the transmission element comprises a said first surface, which is a first major face thereof, and a said second surface, which is a second major face thereof, and at least one of said first and second surfaces, or each of said first and second surfaces, comprises or is formed with optical functional nano-relief or micro-relief which displays either diffractive or refractive behaviour or a combination of diffractive and refractive behaviour.
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