US 11,051,686 B2
Method and apparatus for illuminating an object field imaged by an image sensor
Randal B. Chinnock, Ashford, CT (US); and William L. Weber, Olivebridge, NY (US)
Assigned to TITAN MEDICAL INC., Toronto (CA)
Filed by Titan Medical Inc., Toronto (CA)
Filed on Sep. 22, 2020, as Appl. No. 17/28,025.
Application 17/028,025 is a continuation of application No. 16/512,682, filed on Jul. 16, 2019, granted, now 10,820,791.
Application 16/512,682 is a continuation of application No. 15/754,566, granted, now 10,357,147, issued on Jul. 23, 2019, previously published as PCT/CA2016/000215, filed on Aug. 23, 2016.
Claims priority of provisional application 62/209,157, filed on Aug. 24, 2015.
Prior Publication US 2021/0000335 A1, Jan. 7, 2021
Int. Cl. A61B 1/07 (2006.01); G03B 11/00 (2021.01); G03B 15/02 (2021.01); G03B 15/14 (2021.01); H04N 5/225 (2006.01); A61B 1/00 (2006.01); A61B 1/045 (2006.01); A61B 1/05 (2006.01); A61B 1/06 (2006.01); A61B 1/313 (2006.01)
CPC A61B 1/07 (2013.01) [A61B 1/0017 (2013.01); A61B 1/00096 (2013.01); A61B 1/00186 (2013.01); A61B 1/00188 (2013.01); A61B 1/045 (2013.01); A61B 1/051 (2013.01); A61B 1/0638 (2013.01); A61B 1/0669 (2013.01); A61B 1/3132 (2013.01); G03B 11/00 (2013.01); G03B 15/02 (2013.01); G03B 15/14 (2013.01); H04N 5/2251 (2013.01); H04N 5/2256 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An imaging system comprising:
at least one input light source;
an integrating element comprising an input end and an output face, the integrating element being configured to receive the at least one input light source at the input end and to produce a generally homogenous illumination beam at the output face;
an illumination projector being configured to project an image of the output face of the integrating element onto an object field to produce an illuminated region of the object field, the illumination projector comprising a first polarizer being configured to cause the illuminated region to be illuminated by polarized light having a first polarization direction; and
an imaging apparatus comprising an image sensor, the image sensor being configured to image a portion of the object field corresponding to the illuminated region of the object field,
wherein images captured by the image sensor are captured through a second polarizer having a second polarization direction operable to reduce specular reflections from objects within the object field.