US 12,216,272 B2
Detection of optical surface of patient interface for ophthalmic laser applications using a non-confocal configuration
Mohammad Saidur Rahaman, Santa Clara, CA (US); Hong Fu, Pleasanton, CA (US); Roger W. Accurso, Corning, CA (US); and Zenon Witowski, Rancho Santa Margarita, CA (US)
Assigned to AMO Development, LLC, Irvine, CA (US)
Filed by AMO Development, LLC, Irvine, CA (US)
Filed on Oct. 13, 2023, as Appl. No. 18/487,027.
Application 18/487,027 is a continuation of application No. 17/643,584, filed on Dec. 9, 2021, granted, now 11,789,256.
Application 17/643,584 is a continuation of application No. 16/112,507, filed on Aug. 24, 2018, granted, now 11,215,814, issued on Jan. 4, 2022.
Prior Publication US 2024/0118536 A1, Apr. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 26/08 (2006.01); A61B 3/13 (2006.01); A61F 9/008 (2006.01); G01J 1/42 (2006.01); G02B 27/10 (2006.01)
CPC G02B 26/0875 (2013.01) [A61B 3/13 (2013.01); A61F 9/008 (2013.01); G01J 1/4257 (2013.01); G02B 27/108 (2013.01); A61F 2009/00855 (2013.01); A61F 2009/00897 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method implemented in an ophthalmic laser system, the ophthalmic laser system comprising a laser source for generating a light beam, a moveable objective lens for focusing the light beam, a light intensity detector for detecting a light signal from the objective lens, and a controller, the method comprising:
mounting a patient interface device on the ophthalmic laser system, the patient interface device having an optical element with a distal optical surface;
using the objective lens to focus the light beam generated by the laser source to a focus point located inside the patient interface optical element;
moving the objective lens to move the focus point;
using the light intensity detector, detecting a back-reflected light that has been reflected by the distal optical surface of the patient interface optical element and has passed through the objective lens, to generate a light intensity signal, wherein the back-reflected light travels from the objective lens to the light intensity detector without passing through any other lens;
analyzing the light intensity signal to determine a first position of the objective lens that corresponds to a peak position in the light intensity signal;
determining a second position of the objective lens that focuses the light beam to the distal optical surface of the patient interface optical element;
calculating a difference between the first and second positions of the objective lens as an offset value; and
storing the offset value.