US 12,411,278 B2
Redundant core in multicore optical fiber for safety
Mark E. Froggatt, Blacksburg, VA (US); Dawn K. Gifford, Blacksburg, VA (US); Jeffrey T. LaCroix, Blacksburg, VA (US); Patrick Roye, Christiansburg, VA (US); and Alexander K. Sang, Blacksburg, VA (US)
Assigned to Intuitive Surgical Operations, Inc., Sunnyvale, CA (US)
Filed by Intuitive Surgical Operations, Inc., Sunnyvale, CA (US)
Filed on Feb. 28, 2023, as Appl. No. 18/115,736.
Application 18/115,736 is a continuation of application No. 17/203,701, filed on Mar. 16, 2021, granted, now 11,624,870.
Application 17/203,701 is a continuation of application No. 16/709,341, filed on Dec. 10, 2019, granted, now 10,983,268.
Application 16/709,341 is a continuation of application No. 16/099,763, granted, now 10,545,283, previously published as PCT/US2017/029568, filed on Apr. 26, 2017.
Claims priority of provisional application 62/334,649, filed on May 11, 2016.
Prior Publication US 2023/0204852 A1, Jun. 29, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 6/02 (2006.01); G01B 11/16 (2006.01); G01B 21/04 (2006.01); G01D 5/353 (2006.01)
CPC G02B 6/02042 (2013.01) [G01B 11/161 (2013.01); G01B 21/042 (2013.01); G01D 5/35303 (2013.01); G01D 5/3538 (2013.01); G01D 5/35393 (2013.01); G02B 6/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An interferometric measurement system for measuring an optical shape sensor comprising multiple primary cores in the optical shape sensor and an auxiliary core in the optical shape sensor, the system comprising:
interferometric detection circuitry configured to detect measurement interferometric pattern data associated with each of the multiple primary cores and the auxiliary core; and
data processing circuitry configured to:
determine a shape of the optical shape sensor based on the detected measurement interferometric pattern data for the multiple primary cores,
determine a predicted phase or strain value of the auxiliary core based in part on the detected measurement interferometric pattern data for the multiple primary cores,
determine a measurement-based phase or strain value of the auxiliary core based on the detected measurement interferometric pattern data for the auxiliary core,
determine a difference between the predicted phase or strain value of the auxiliary core and the measurement-based phase or strain value of the auxiliary core, and
detect an error associated with the determined shape of the optical shape sensor based on the difference.