Optical sky-sun diffuser
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United States of America Patent
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Jun 22, 2021
Grant Date -
N/A
app pub date -
Feb 25, 2019
filing date -
Jun 24, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
An embodiment of a solid optical sky-sun diffuser, which comprises a transparent solid matrix embedding a dispersion of transparent nanoparticles having an average size d in the range 10 nm≤d≤240 nm; wherein: the ratio between the blue and red scattering optical densities γ≡Log [T(450 nm)]/Log [T(630 nm)] of said diffuser falls in the range 5≥γ≥2.5, where T(λ) is the Monochromatic Normalized Collinear Transmittance; in at least one propagation direction, said Monochromatic Normalized Collinear Transmittance is T(450 nm)≥0.4; in at least one propagation direction said Monochromatic Normalized Collinear Transmittance is T(450 nm)≤0.9, said propagation direction being the same or different from that at which said Monochromatic Normalized Collinear Transmittance is T(450 mm)≥0.4.
First Claim
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International Classification(s)
- F21V:FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES....
- F21W:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L,....
- H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
- F21Y:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L,....
- F21K:LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- G02B:OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- F21S:NON-PORTABLE LIGHTING DEVICES OR SYSTEMS THEREOF
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