US 11,867,506 B2
Scanning device and optical coherence tomography system
Chu-Ming Cheng, Hsinchu (TW); and Long-Sheng Liao, Hsinchu (TW)
Assigned to MEDIMAGING INTEGRATED SOLUTION, INC., Hsinchu (TW)
Filed by Medimaging Integrated Solution, Inc., Hsinchu (TW)
Filed on Feb. 26, 2021, as Appl. No. 17/186,677.
Claims priority of application No. 109113537 (TW), filed on Apr. 22, 2020.
Prior Publication US 2021/0333090 A1, Oct. 28, 2021
Int. Cl. G01B 9/02 (2022.01); G01B 9/02091 (2022.01); A61B 3/10 (2006.01); G02B 26/08 (2006.01)
CPC G01B 9/02091 (2013.01) [A61B 3/102 (2013.01); G02B 26/0833 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A scanning device, which cooperates with a main structure to form an optical coherence tomography system, wherein the main structure outputs a sampling light beam, and the scanning device comprises:
a scanning reflector, optically coupled to the main structure, and deflecting the sampling light beam to make the sampling light beam scan a fundus of an eyeball;
a light splitter, optically coupled to the scanning reflector, and guiding the sampling light beam to the eyeball;
a scanning lens group, optically coupled to the light splitter;
an objective lens, disposed coaxially with the scanning lens group with respective to an optical axis, and making the sampling light beam, which comes from the light splitter and passes through the scanning lens group and the objective lens in sequence, reach the fundus of the eyeball, wherein the sampling light beam reflected from the fundus returns to the main structure along a sampling optical path to generate an optical tomographic image;
an illumination light source, disposed at a position away from the optical axis, and generating and projecting an illumination light beam to the objective lens, the objective lens converges the illumination light beam to illuminate the fundus, and an optical path of the illumination light beam is axially separate from the optical axis of the sampling light beam between the scanning lens group and the objective lens;
an imaging lens group, optically coupled to the light splitter;
an image sensor, disposed at a light-exit side of the imaging lens group, wherein the illumination light source, the objective lens, the scanning lens group, the imaging lens group and the image sensor jointly form a fundus imaging system, and wherein the optical coherence tomography system and the fundus imaging system share the scanning lens group, and wherein the illumination light beam reflected from the fundus goes through the objective lens, the scanning lens group, the light splitter, and the imaging lens group to the image sensor to generate a corresponding fundus image; and
a handheld housing,
wherein the scanning reflector, the light splitter, the scanning lens group, the objective lens, the illumination light source, the imaging lens group and the image sensor are disposed inside the handheld housing, and wherein the scanning device is optically coupled to the main structure via an optical fiber,
wherein a distance of the illumination light source to the objective lens is smaller than or equal to a distance of the scanning lens group to the objective lens, and
wherein the imaging lens group is spatially located between the light splitter and the image sensor.