US 12,144,489 B2
Liquid lens auto focus for endoscopic surgery visualization
Levey Trac Tran, Denver, CO (US); Chien Mien Pang, San Jose, CA (US); Ajay Ramesh, Pleasanton, CA (US); Rohit Subramanian, San Jose, CA (US); and Pankaj Sharma, San Jose, CA (US)
Assigned to Stryker Corporation, Kalamazoo, MI (US)
Appl. No. 17/052,157
Filed by Stryker Corporation, Kalamazoo, MI (US)
PCT Filed May 2, 2019, PCT No. PCT/US2019/030339
§ 371(c)(1), (2) Date Oct. 30, 2020,
PCT Pub. No. WO2019/213360, PCT Pub. Date Nov. 7, 2019.
Claims priority of provisional application 62/665,716, filed on May 2, 2018.
Prior Publication US 2021/0058559 A1, Feb. 25, 2021
Int. Cl. A61B 1/00 (2006.01); A61B 1/04 (2006.01); G02B 23/24 (2006.01); H04N 23/55 (2023.01); H04N 23/67 (2023.01)
CPC A61B 1/0019 (2013.01) [A61B 1/00009 (2013.01); A61B 1/042 (2013.01); G02B 23/2484 (2013.01); H04N 23/55 (2023.01); H04N 23/673 (2023.01)] 13 Claims
OG exemplary drawing
 
1. A surgical camera system comprising:
an endoscopic camera head including a housing comprising a rear enclosure portion and a front enclosure portion connected to the rear enclosure portion, the front enclosure portion comprising an endoscopic coupler for coupling an endoscope to the endoscopic camera head;
an image sensor within the rear enclosure portion of the housing; and
the front enclosure portion of the housing including a liquid lens therein for focusing an image received in the front enclosure portion of the housing prior to transmission of the image to the image sensor, and a fixed solid lens adjacent the liquid lens within the front enclosure portion,
wherein the surgical camera system is configured to:
detect a coverage of the image sensor by light projected by the endoscope into the endoscopic camera head,
set a region of interest based on the detected coverage,
calculate a focus metric within the region of interest, and
based on the focus metric, control the liquid lens to adjust the focus of the endoscopic camera head.