US 12,248,162 B2
Optical assembly and optical system for beam steering and homogenization
Lasse Orsila, Tampere (FI); and Petteri Uusimaa, Tampere (FI)
Assigned to Modulight Corporation, Tampere (FI)
Filed by Modulight Corporation, Tampere (FI)
Filed on Jun. 22, 2022, as Appl. No. 17/846,707.
Prior Publication US 2023/0417972 A1, Dec. 28, 2023
Int. Cl. F21V 8/00 (2006.01); G02B 6/28 (2006.01); G02B 26/10 (2006.01); G02B 27/09 (2006.01); G02B 27/48 (2006.01)
CPC G02B 6/0006 (2013.01) [G02B 6/2804 (2013.01); G02B 26/10 (2013.01); G02B 27/0922 (2013.01); G02B 27/48 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An optical assembly comprising:
a plurality of light sources that, in operation, emit a plurality of light beams, the plurality of light beams having a plurality of wavelengths;
a fiber combiner arranged on an optical path of the plurality of light beams to combine the plurality of light beams into a combined beam, the fiber combiner having a first end and a second end, wherein the plurality of light beams enter the fiber combiner at the first end and the combined beam exits the fiber combiner at the second end;
an optical homogenizer for producing a homogenous intensity profile of the combined beam, the optical homogenizer having a third end and a fourth end, wherein the combined beam having a non-homogenous intensity profile is received from the fiber combiner at the third end and the combined beam having the homogeneous intensity profile exits the optical homogenizer at the fourth end;
a first optical element and a second optical element arranged on an optical path of the combined beam, between the optical homogenizer and a light guide, wherein the first optical element and the second optical element collectively steer the combined beam towards the light guide, and wherein when the optical assembly is in use, the second optical element is adjustable to steer the combined beam;
a first actuator coupled to the first optical element;
a controller communicably coupled to the first actuator, the controller being configured to generate a first signal for controlling the first actuator to adjust the first optical element in a manner that the combined beam is steered by the first optical element whilst also causing vibration of the first optical element at a randomized pattern; and
a second actuator coupled to the second optical element, wherein the controller is communicably coupled to the second actuator, the controller being configured to generate a second signal for controlling the second actuator to adjust the second optical element in a manner that the combined beam is steered by the second optical element.