US 12,404,989 B2
Optics for luminaires
Petr Lobaz, Plzen (CZ); Zbynek Ryzi, Littleton, MA (US); and Martin Nyvlt, Prague (CZ)
Assigned to IQS GROUP s.r.o., Husinec-Rez (CZ)
Appl. No. 18/005,071
Filed by IQS GROUP s.r.o., Husinec-Rez (CZ)
PCT Filed Jul. 12, 2021, PCT No. PCT/EP2021/069324
§ 371(c)(1), (2) Date Jan. 11, 2023,
PCT Pub. No. WO2022/013147, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 2010757 (GB), filed on Jul. 13, 2020.
Prior Publication US 2023/0341108 A1, Oct. 26, 2023
Int. Cl. F21V 5/04 (2006.01); F21V 7/04 (2006.01); F21V 7/28 (2018.01); F21V 14/04 (2006.01); F21Y 103/10 (2016.01)
CPC F21V 14/04 (2013.01) [F21V 5/045 (2013.01); F21V 7/048 (2013.01); F21V 7/28 (2018.02); F21Y 2103/10 (2016.08)] 23 Claims
OG exemplary drawing
 
1. An optical arrangement for use in forming a luminaire, the optical arrangement comprising:
an optical element; and
at least one linear light source located at a predetermined location relative to the optical element;
wherein the optical element is for creating a prescribed output light distribution pattern from light emitted by said light source at said predetermined location relative to the optical element, the optical element comprising a body including a surface which comprises a faceted structure, the faceted structure comprising one or more strips or rows each comprising a plurality of primary facets,
wherein, for any given strip or row of primary facets:
(i) each respective primary facet within the given strip or row is configured such that each respective primary facet redirects light from a respective input direction associated with that primary facet into a respective output direction associated with that primary facet;
(ii) each respective primary facet within the given strip or row is configured such that light propagating therefrom in said respective output direction associated with that primary facet contributes to the prescribed output light distribution pattern; and
(iii) the respective primary facets within the given strip or row are configured such that:
the distribution of the respective output directions associated with the respective primary facets in the given strip or row has a random or quasi-random character with respect to positions of the respective primary facets in the given strip or row, and
the random or quasi-random character of the distribution of the respective output directions associated with the respective primary facets in the given strip or row is defined by a probability density function correlating with the prescribed output light distribution pattern and not with the positions of the respective primary facets in the given strip or row.