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US 8,894,244 B2Granted
Transmission type optical element, lighting arrangement, and method for manufacturing
AssigneeNanocomp Oy Ltd
InventorValtteri Kalima
Life of this patent
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Abstract
A transmission type optical element (10) comprises a surface relief micro-grating (5, 9) for guiding light (13) propagating through the optical element. According to the present invention, at least a portion (5) of the thickness of the optical element (10) is formed of a colored material (4) so as to make the optical element colored.
Claims20
A transmission type optical element comprising:
- a surface relief micro-grating for guiding light propagating through the optical element;
- an optically clear base layer;
- and
- an overlaying layer lying on the base layer;
- wherein the micro-grating is formed on the surface of the overlying layer opposite to the surface facing towards the base layer, the overlaying layer material including a color agent so as to make the optical element colored.
2 more elements
A transmission type optical element comprising:
- a surface relief micro-grating for guiding light propagating through the optical element, wherein at least a portion of the thickness of the optical element is formed of a colored material so as to make the optical element colored;
- an optically clear base layer;
- and
- an overlaying layer lying on the base layer, the micro-grating being formed on the surface of the overlying layer opposite to the surface facing towards the base layer, the overlaying layer material comprising color agent so as to make the optical element colored.
1 more element
A method for manufacturing a transmission type micro-optical element, the method comprising:
- forming a surface relief micro-grating for guiding light propagating through the optical element, wherein at least a portion of the thickness of the optical element is formed of a colored material so as to make the optical element colored;
- providing an optically clear base film;
- forming an overlaying film on the clear base film, the overlaying film comprising the surface relief micro-grating on the surface of the overlying layer opposite to the surface facing towards the base layer;
- and
- adding a color agent to the overlaying film so as to make the optical element colored.
2 more elements
Dependencies are inferred from the claim text.