US 12,253,694 B2
Optical system
Hsin-Yi Hsieh, Hsin-Chu (TW); Po-Han Fu, Hsin-Chu (TW); Hsin-Wei Mao, Hsin-Chu (TW); Wei-Ko Wang, Hsin-Chu (TW); and Chin-Chuan Hsieh, Hsin-Chu (TW)
Assigned to VisEra Technologies Company Ltd., Hsin-Chu (TW)
Filed by VisEra Technologies Company Ltd., Hsin-Chu (TW)
Filed on Apr. 28, 2022, as Appl. No. 17/732,329.
Prior Publication US 2023/0350111 A1, Nov. 2, 2023
Int. Cl. G02B 5/18 (2006.01); G02B 27/09 (2006.01); G02B 27/10 (2006.01); G02B 27/44 (2006.01)
CPC G02B 5/1819 (2013.01) [G02B 27/0944 (2013.01); G02B 27/1086 (2013.01); G02B 27/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical system, comprising:
a projector emitting three beams having different wavelengths;
a deflector disposed below the projector and configured to change incident angles of the three beams and to focus the three beams at the same region of a first grating coupler structure,
wherein the first grating coupler structure is below the deflector and is configured to couple the three beams into a light-guide lens such that the three beams travel the same optical path within the light-guide lens,
wherein the light-guide lens is connected to the first grating coupler structure and is configured to transmit the three beams;
a polarizer disposed between the projector and the deflector and configured to filter out transverse electric (TE) modes or transverse magnetic (TM) modes of the three beams; and
a second grating coupler structure disposed on the light-guide lens and configured to enable the three beams departing from the light-guide lens after the three beams have traveled the same optical path.