US 12,345,391 B2
Optical device with two optical elements for modifying light distribution
Olli Saarnio, Salo (FI)
Assigned to LEDIL OY, Salo (FI)
Appl. No. 18/572,713
Filed by LEDIL OY, Salo (FI)
PCT Filed Jun. 6, 2022, PCT No. PCT/FI2022/050391
§ 371(c)(1), (2) Date Dec. 20, 2023,
PCT Pub. No. WO2023/012400, PCT Pub. Date Feb. 9, 2023.
Claims priority of application No. 20215832 (FI), filed on Aug. 2, 2021.
Prior Publication US 2024/0288149 A1, Aug. 29, 2024
Int. Cl. F21V 14/06 (2006.01); F21V 5/00 (2018.01); F21V 5/04 (2006.01); F21V 7/00 (2006.01); F21Y 115/10 (2016.01)
CPC F21V 14/06 (2013.01) [F21V 5/008 (2013.01); F21V 5/045 (2013.01); F21V 7/0091 (2013.01); F21Y 2115/10 (2016.08)] 20 Claims
OG exemplary drawing
 
1. An optical device for modifying light distribution, the optical device comprising:
a first optical element comprising a first surface for modifying a distribution of light exiting the first optical element through the first surface, and
a second optical element comprising a second surface facing towards the first surface in a first direction and for further modifying the distribution of the light entering the second optical element through the second surface,
wherein the second optical element is moveably supported with respect to the first optical element so that the second surface is movable with respect to the first surface in a direction parallel with the first surface, and that one of the first and second surfaces comprises convex areas and another one of the first and second surfaces comprises concave areas for at least partly compensating for an optical effect of the convex areas when the second optical element is in a first position with respect to the first optical element so that the convex areas and the concave areas are aligned with respect to each other, wherein a combined optical effect of the first and second surfaces is changeable by moving the second optical element from the first position towards a second position in which the concave areas and the convex areas are non-aligned with respect to each other, and wherein at least one of the first and second surfaces is shaped to have stepwise shape discontinuities configured to reduce a spatial room between the first and second surfaces in at least one position of the second optical element with respect to the first optical element.