IP Library › Granted Patent US 12,245,753
Granted Patent B2
US 12,245,753 · App. 18/137,384 · Granted Mar 11, 2025

Conductive optical element

Inventors: Scott Miller (Arlington, VA); Frank Carter (Wormleysburg, PA); Adnan Merchant (Fremont, CA); Carl Gauger (Kansas City, MO)
Assignee: GI SCIENTIFIC, LLC
A61B1/128A61B1/00027A61B1/00087A61B1/00096A61B1/127A61B18/082A61B18/14A61B18/1492A61N7/022A61B2018/00059A61B2018/00583A61B2018/00595A61B2018/00607A61B2018/00982A61B2018/1405A61B2018/147A61B18/1815A61N2007/0043
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Quick Facts
Patent No.
US 12,245,753
App. No.
18/137,384
Granted
Mar 11, 2025
Kind
B2
Abstract

A device having an optical element with a conductive coating. The device may include an optical element, a conductive material and at least one connector. The conductive material is disposed on at least a portion of the optical element. The optical element, for example, may be an object lens of an endoscope or an optical coupler. The connectors (acting as terminal(s)) are capable of providing energy (such as electrical energy) to the conductive material. In one aspect, the conductive material is an optically transparent material. Advantageously, the device may allow visualization of an object—such as body tissue or other matter—concurrent with the application of energy to the object via the conductive coating. This allows the user to observe the alteration of tissue and other matter in real time as the energy is delivered.

Claims (27)

1. A device for use with an endoscope having an optical lens, the device comprising:

an optical coupler having a distal end, a proximal end, a visualization section at the distal end, and an attachment section at the proximal end for attachment to the endoscope, wherein the visualization section is configured to cover at least a portion of the optical lens of the endoscope and being capable of transmitting an optical image through the optical coupler;

an electrically conductive coating disposed on at least a portion of the distal end of the optical coupler, wherein the electrically conductive coating is at least partially transparent;

at least one connector capable of providing energy to the electrically conductive coating; and

a working channel extension within the optical coupler for receiving an instrument, fluid or gas, wherein the working channel extension extends from the endoscope through the visualization section to an outer surface of the visualization section.

2. The device of claim 1 , wherein the electrically conductive coating includes a conductive oxide.

3. The device of claim 2 , wherein the conductive oxide is selected from the group consisting of a titanium conductive oxide and an aluminum conductive oxide.

4. The device of claim 1 , wherein the electrically conductive coating comprises an electrode configured to delivery energy to tissue adjacent to, or in contact with, the optical coupler.

5. The device of claim 1 , wherein the electrically conductive coating is configured to generate and transmit thermal energy to tissue disposed adjacent to, or in contact with, the optical coupler.

6. The device of claim 1 , wherein the working channel extension has a proximal end portion configured to couple to a distal end portion of a working channel in the endoscope.

7. The device of claim 6 , wherein the proximal end portion of the working channel extension is configured to contact a portion of the surface of the endoscope adjacent to the distal end portion of the working channel of the endoscope.

8. The device of claim 7 , wherein the working channel extension has a distal opening disposed within the visualization section and spaced proximally from at least one portion of the electrically conductive coating.

9. An endoscope assembly comprising:

an endoscope having an optical lens, an internal working channel and a distal end portion, and

an optical coupler comprising:

a visualization section at a distal end of the optical coupler;

an attachment section at a proximal end of the optical coupler and configured for attachment to the distal end portion of the endoscope, wherein the visualization section is configured to cover at least a portion of the optical lens of the endoscope and being capable of transmitting an optical image through the optical coupler;

an electrically conductive coating disposed on at least a portion of the distal end of the optical coupler, wherein the electrically conductive coating is at least partially transparent; and

at least one connector capable of providing energy to the electrically conductive coating; and

a working channel extension within the optical coupler for receiving an instrument, fluid or gas, wherein the working channel extension extends from the internal working channel of the endoscope through the visualization section to an outer surface of the visualization section.

10. The endoscope assembly of claim 9 , wherein the electrically conductive coating includes a conductive oxide.

11. The device of claim 10 , wherein the conductive oxide is selected from the group consisting of a titanium conductive oxide and an aluminum conductive oxide.

12. The device of claim 9 , wherein the electrically conductive coating comprises an electrode configured to delivery energy to tissue adjacent to, or in contact with, the optical coupler.

13. The device of claim 9 , wherein the electrically conductive coating is configured to generate and transmit thermal energy to tissue disposed adjacent to, or in contact with, the optical coupler.

14. The device of claim 9 , wherein the working channel extension has a proximal end portion configured to couple to a distal end portion of the internal working channel in the endoscope.

15. The device of claim 14 , wherein the proximal end portion of the working channel extension is configured to contact a portion of the surface of the endoscope adjacent to the distal end portion of the internal working channel of the endoscope.

16. The device of claim 14 , wherein the working channel extension has a distal opening disposed within the visualization section and spaced proximally from at least one portion of the electrically conductive coating.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 20, 2023
From: MILLER, SCOTT; CARTER, FRANK; MERCHANT, ADNAN; GAUGER, CARL
To: GI SCIENTIFIC, LLC
Reel/Frame 063394/0276 →
Continuity (3)
Continuation 16776168 · Jan 29, 2020
Continuation 14728812 · Jun 2, 2015
Related Publication 20230255463A1 · Aug 17, 2023
References Cited (236)
US 3774614A · Cook · 1973 [cited by applicant]
US 3858577A · Bass et al. · 1975 [cited by applicant]
US 4090501A · Chaitin · 1978 [cited by applicant]
US 4201199A · Smith · 1980 [cited by applicant]
US 4207872A · Meiri et al. · 1980 [cited by applicant]
US 4340811A · Yamashita et al. · 1982 [cited by applicant]
US 4681093A · Ono et al. · 1987 [cited by applicant]
US 4696544A · Costella · 1987 [cited by applicant]
US 4744620A · Ueno et al. · 1988 [cited by applicant]
US 4779611A · Grooters et al. · 1988 [cited by applicant]
US 4805598A · Ueda · 1989 [cited by applicant]
US 4878725A · Hessel et al. · 1989 [cited by applicant]
US 4881810A · Hasegawa · 1989 [cited by applicant]
US 4888243A · Jonas et al. · 1989 [cited by applicant]
US 4967732A · Inoue · 1990 [cited by applicant]
US 5040715A · Green et al. · 1991 [cited by applicant]
US 5050585A · Takahashi · 1991 [cited by applicant]
US 5080660A · Buelna · 1992 [cited by applicant]
US 5104025A · Main et al. · 1992 [cited by applicant]
US 5137198A · Nobis et al. · 1992 [cited by applicant]
US 5201900A · Nardella · 1993 [cited by applicant]
US 5205459A · Brinkerhoff et al. · 1993 [cited by applicant]
US 5237984A · Williams, III et al. · 1993 [cited by applicant]
US 5271379A · Phan et al. · 1993 [cited by applicant]
US 5326013A · Green et al. · 1994 [cited by applicant]
US 5329935A · Takahashi · 1994 [cited by applicant]
US 5337734A · Saab · 1994 [cited by applicant]
US 5342388A · Toller · 1994 [cited by applicant]
US 5413052A · Breezer et al. · 1995 [cited by applicant]
US 5413268A · Green et al. · 1995 [cited by applicant]
US 5443781A · Saab · 1995 [cited by applicant]
US 5448990A · De Faria-Correa · 1995 [cited by applicant]
US 5460168A · Masubuchi et al. · 1995 [cited by applicant]
US 5476206A · Green et al. · 1995 [cited by applicant]
US 5536236A · Yabe et al. · 1996 [cited by applicant]
US 5555129A · Konno et al. · 1996 [cited by applicant]
US 5575291A · Hayakawa et al. · 1996 [cited by applicant]
US 5605532A · Schermerhorn · 1997 [cited by applicant]
US 5632717A · Yoon · 1997 [cited by applicant]
US 5657921A · Young et al. · 1997 [cited by applicant]
US 5662258A · Knodel et al. · 1997 [cited by applicant]
US 5674181A · Lida · 1997 [cited by applicant]
US 5707342A · Tanaka · 1998 [cited by applicant]
US 5725474A · Yasui et al. · 1998 [cited by applicant]
US 5725475A · Yasui et al. · 1998 [cited by applicant]
US 5738629A · Moll et al. · 1998 [cited by applicant]
US 5743851A · Moll et al. · 1998 [cited by applicant]
US 5771327A · Bar-Or et al. · 1998 [cited by applicant]
US 5788628A · Matsuno et al. · 1998 [cited by applicant]
US 5808813A · Lucey et al. · 1998 [cited by applicant]
US 5840014A · Miyano et al. · 1998 [cited by applicant]
US 5860913A · Yamaya et al. · 1999 [cited by applicant]
US 5897487A · Ouchi · 1999 [cited by applicant]
US 5916148A · Tsuyuki · 1999 [cited by applicant]
US 6059719A · Yamamoto et al. · 2000 [cited by applicant]
US 6131789A · Schulze et al. · 2000 [cited by applicant]
US 6217509B1 · Foley et al. · 2001 [cited by applicant]
US 6250532B1 · Green et al. · 2001 [cited by applicant]
US 6277065B1 · Donofrio · 2001 [cited by applicant]
US 6283951B1 · Flaherty et al. · 2001 [cited by applicant]
US 6293907B1 · Axon et al. · 2001 [cited by applicant]
US 6306081B1 · Ishikawa et al. · 2001 [cited by applicant]
US 6409725B1 · Khandkar et al. · 2002 [cited by applicant]
US 6416462B1 · Tovey et al. · 2002 [cited by applicant]
US 6673091B1 · Shaffer et al. · 2004 [cited by applicant]
US 6699180B2 · Kobayashi · 2004 [cited by applicant]
US 6712524B2 · Beatty et al. · 2004 [cited by applicant]
US 6723350B2 · Burrell et al. · 2004 [cited by applicant]
US 6733440B2 · Ailinger et al. · 2004 [cited by applicant]
US 6770069B1 · Hobart et al. · 2004 [cited by applicant]
US 6792837B2 · Battistone · 2004 [cited by applicant]
US 6855108B2 · Ishibiki et al. · 2005 [cited by applicant]
US 6866627B2 · Nozue · 2005 [cited by applicant]
US 6934093B2 · Kislev et al. · 2005 [cited by applicant]
US 6981628B2 · Wales · 2006 [cited by applicant]
US 6988650B2 · Schwemberger et al. · 2006 [cited by applicant]
US 7033317B2 · Pruitt · 2006 [cited by applicant]
US 7046439B2 · Kaminsky et al. · 2006 [cited by applicant]
US 7087012B2 · Ishibiki · 2006 [cited by applicant]
US 7112195B2 · Boll et al. · 2006 [cited by applicant]
US 7205339B2 · Muratoglu · 2007 [cited by applicant]
US 7235592B2 · Muratoglu et al. · 2007 [cited by applicant]
US 7238153B2 · Moriyama · 2007 [cited by applicant]
US 7245813B2 · Brown et al. · 2007 [cited by applicant]
US 7464847B2 · Viola et al. · 2008 [cited by applicant]
US 7537561B2 · Yamaya et al. · 2009 [cited by applicant]
US 7553278B2 · Kucklick · 2009 [cited by applicant]
US 7554743B2 · Jiang et al. · 2009 [cited by applicant]
US 7566993B2 · May · 2009 [cited by applicant]
US 7621868B2 · Breidenthal et al. · 2009 [cited by applicant]
US 7819872B2 · Johnson et al. · 2010 [cited by applicant]
US 7977255B1 · Scheer et al. · 2011 [cited by applicant]
US 8180423B2 · Mang et al. · 2012 [cited by applicant]
US 8905921B2 · Titus · 2014 [cited by applicant]
US 8915931B2 · Boudreaux et al. · 2014 [cited by applicant]
US 9459442B2 · Miller · 2016 [cited by applicant]
US 9709795B2 · Miller · 2017 [cited by applicant]
US 10101574B2 · Miller · 2018 [cited by applicant]
US 20020035311A1 · Ouchi · 2002 [cited by applicant]
US 20020065515A1 · Falwell et al. · 2002 [cited by applicant]
US 20020133148A1 · Daniel et al. · 2002 [cited by applicant]
US 20030181900A1 · Long · 2003 [cited by applicant]
US 20040157073A1 · Burrell et al. · 2004 [cited by applicant]
US 20040249246A1 · Campos · 2004 [cited by applicant]
US 20040263613A1 · Morita · 2004 [cited by applicant]
US 20040267092A1 · Ishibiki · 2004 [cited by applicant]
US 20050043589A1 · Pruitt · 2005 [cited by applicant]
US 20050080411A1 · Ouchi · 2005 [cited by applicant]
US 20050131279A1 · Boulais et al. · 2005 [cited by applicant]
US 20050197530A1 · Wallace et al. · 2005 [cited by applicant]
US 20060030844A1 · Knight et al. · 2006 [cited by applicant]
US 20060084839A1 · Mourlas et al. · 2006 [cited by applicant]
US 20060173241A1 · Ouchi et al. · 2006 [cited by applicant]
US 20060200176A1 · Matsuno et al. · 2006 [cited by applicant]
US 20060229662A1 · Finkielsztein et al. · 2006 [cited by applicant]
US 20060270900A1 · Chin et al. · 2006 [cited by applicant]
US 20070038043A1 · Gelikonov et al. · 2007 [cited by applicant]
US 20070066869A1 · Hoffman · 2007 [cited by applicant]
US 20070066870A1 · Ohashi et al. · 2007 [cited by applicant]
US 20070073108A1 · Takahashi · 2007 [cited by applicant]
US 20070208219A1 · Carter · 2007 [cited by applicant]
US 20070239620A1 · Schwartz et al. · 2007 [cited by applicant]
US 20070260117A1 · Zwolinski et al. · 2007 [cited by applicant]
US 20070282256A1 · Hu et al. · 2007 [cited by applicant]
US 20070293888A1 · Harren et al. · 2007 [cited by applicant]
US 20080021268A1 · Shoroji et al. · 2008 [cited by applicant]
US 20080021269A1 · Tinkham et al. · 2008 [cited by applicant]
US 20080033246A1 · Matsui et al. · 2008 [cited by applicant]
US 20080139885A1 · Knapp · 2008 [cited by applicant]
US 20080188874A1 · Henderson · 2008 [cited by applicant]
US 20080262295A1 · Kendale et al. · 2008 [cited by applicant]
US 20080306335A1 · Lau et al. · 2008 [cited by applicant]
US 20090048483A1 · Yamamoto · 2009 [cited by applicant]
US 20090048486A1 · Surti · 2009 [cited by applicant]
US 20090062790A1 · Malchano et al. · 2009 [cited by applicant]
US 20090098409A1 · Yamada et al. · 2009 [cited by applicant]
US 20090143643A1 · Weitzner et al. · 2009 [cited by applicant]
US 20090156898A1 · Ichimura · 2009 [cited by applicant]
US 20090254164A1 · Johnson et al. · 2009 [cited by applicant]
US 20090315989A1 · Adelson · 2009 [cited by applicant]
US 20090326328A1 · Kucklick · 2009 [cited by applicant]
US 20100026940A1 · Takegami et al. · 2010 [cited by applicant]
US 20100121442A1 · Shea et al. · 2010 [cited by applicant]
US 20100203454A1 · Brongersma et al. · 2010 [cited by applicant]
US 20100268027A1 · Aono et al. · 2010 [cited by applicant]
US 20100286475A1 · Robertson · 2010 [cited by applicant]
US 20110124960A1 · St. Onge et al. · 2011 [cited by applicant]
US 20110152618A1 · Surti · 2011 [cited by applicant]
US 20120034573A1 · Erdmann et al. · 2012 [cited by applicant]
US 20120209074A1 · Titus · 2012 [cited by applicant]
US 20120209090A1 · Goodall et al. · 2012 [cited by applicant]
US 20120232342A1 · Reydel · 2012 [cited by applicant]
US 20130040516A1 · Pruneri et al. · 2013 [cited by applicant]
US 20130090527A1 · Axon · 2013 [cited by applicant]
US 20130144287A1 · Crowley et al. · 2013 [cited by applicant]
US 20130190562A1 · Smith et al. · 2013 [cited by applicant]
US 20130237998A1 · Wallace et al. · 2013 [cited by applicant]
US 20150073214A1 · Ueda · 2015 [cited by applicant]
US 20160051135A1 · Greenberg et al. · 2016 [cited by applicant]
US 20160270636A1 · Iwasaka et al. · 2016 [cited by applicant]
US 20170066111A1 · Wang · 2017 [cited by applicant]
US 20170311789A1 · Mulcahey et al. · 2017 [cited by applicant]
US 20180096191A1 · Siemens · 2018 [cited by applicant]
US 20190261912A1 · Shepherd et al. · 2019 [cited by applicant]
US 20190304093A1 · Duval et al. · 2019 [cited by applicant]
US 20190311476A1 · Hayami et al. · 2019 [cited by applicant]
US 20190384088A1 · Watanabe · 2019 [cited by applicant]
CN 1692872A · 2011 [cited by applicant]
DE 3532609A · 1987 [cited by applicant]
EP 1870018A2 · 2007 [cited by applicant]
JP H0373168A · 1991 [cited by applicant]
JP H09238893A · 1997 [cited by applicant]
JP 2000300570A · 2000 [cited by applicant]
JP 3124079B2 · 2001 [cited by applicant]
JP 2002233491A · 2002 [cited by applicant]
JP 2003033319A · 2003 [cited by applicant]
JP 2003339631A · 2003 [cited by applicant]
JP 2005066139A · 2005 [cited by applicant]
JP 2006026344A · 2006 [cited by applicant]
JP 2009261830A · 2009 [cited by applicant]
WO WO9929362A1 · 1999 [cited by applicant]
WO WO2001085319A1 · 2001 [cited by applicant]
WO WO2006138409A2 · 2006 [cited by applicant]
WO WO2007029230A2 · 2007 [cited by applicant]
WO WO2007029814A1 · 2007 [cited by applicant]
WO WO2007147060A2 · 2007 [cited by applicant]
WO WO2009149042A2 · 2009 [cited by applicant]
WO WO2011085319A1 · 2011 [cited by applicant]
WO WO2011099329A1 · 2011 [cited by applicant]
WO WO2011148172A2 · 2011 [cited by applicant]
WO WO2014123563A1 · 2014 [cited by applicant]
WO WO2017011535A1 · 2017 [cited by applicant]
European Examination Report for EP Appl. No. 15843356.5 dated May 20, 2019, 7 pages. [cited by applicant]
Extended European Search Report for EP Appl. No. 16828548.4 dated Feb. 28, 2019. [cited by applicant]
Extended European Search Report for EP Appl. No. 16804476.6 dated Dec. 5, 2018. [cited by applicant]
Extended European Search Report and Written Opinion for EP Appl. No. 16804462-6 dated Dec. 10, 2018. [cited by applicant]
Extended European Search Report for EP Appl. No. 12747511.9 dated Jan. 3, 2018. [cited by applicant]
Extended European Search Report for EP Appl. No. 18174913.6 dated Aug. 16, 2019. [cited by applicant]
International Preliminary Report on Patentability issued in PCT/US2015/051662 dated Apr. 6, 2017. [cited by applicant]
International Search Report and Written Opinion for PCT Appl. No. PCT/US2019/012448 mailed Apr. 16, 2019. [cited by applicant]
International Search Report and Written Opinion dated Oct. 26, 2016 for PCT Application No. PCT/US2016/043371, filed Jul. 21, 2016. [cited by applicant]
International Search Report issued in corresponding International Application No. PCT/US2015/051662 dated Dec. 14, 2015. [cited by applicant]
International Search Report and Written Opinion dated Sep. 21, 2012 for PCT Appl. No. PCT/US2012/025404. [cited by applicant]
Japanese Patent Office, Notification of Reasons for Refusal, JP Appl. No. 2013-554596, Dec. 8, 2015. [cited by applicant]
Chinese Office Action and Search Report for CN Appl. No. 201280014363, Mar. 23, 2015. [cited by applicant]
Chinese Office Action for CN Appl. No. 201280014363, Jan. 5, 2016. [cited by applicant]
Chinese Office Action for CN Appl. No. 201680045602.6 dated Jun. 5, 2019. [cited by applicant]
First Examination Report for Indian Appl. No. 6566/CHENP/2013 dated Aug. 29, 2019. [cited by applicant]
Beneq Biocompatible Coatings Webpage. [cited by applicant]
Cargille Laboratories, Inc. Material Safety Data Sheet—Cargille Optical Gel Code 0607, Jun. 3, 2005. [cited by applicant]
Depth of Field, OPMI Application Tip #2, Informed for Medical Professionals in Neuro, ENT and Spine, 2nd Issue, Oct. 2006, Published by Carl Zeiss Surgical GmbH, Germany. [cited by applicant]
Jaxton, et al., An Experimental Investigation on the Development of Hydrogels for Optical Applications, Polymer Testing, 2003, 22(4):371-374, English Abstract. [cited by applicant]
Kopp, et al., Chapter 9, Optical Principles of the Endoscope, Hysteroscopy: Visual Perspectives of Uterine Anatomy, Physiology & Pathology, 3rd Edition, Lippincott Williams & Wilkins, 2007, 19 pages. [cited by applicant]
Maquet Training Manual, Vasoview 6 Endoscopic Vessel Harvesting System, Cardiovascular, Copyright Maquet Cardiovascular LLC, Oct. 2008. [cited by applicant]
Oil Immersion, From Wikipedia, http://en.wikipedia.org/wiki/Oil.sub.--immerson, Printed Sep. 7, 2010. [cited by applicant]
Olympus Colonoscopes Outpatient Doctor Surgery Center, http://outpatientsurgicare.com/index.PHP?Facilities: Technologies:Olympus.sub.--Colonoscopes&print, Printed Oct. 26, 2010. [cited by applicant]
Olympus Disposal Distal Attachment Product Data Sheet. [cited by applicant]
Olympus Evis Exera Colonovideoscope/Sigmoidovideoscope, Olympus CF Type Q1601JUS, Today's Most Versatile Choice for Colonoscopy, Product Data Sheet. [cited by applicant]
Olympus Technologies Evis Exera II, Learn About Wide-Angle, http://www.olympusamerica.com/msg.sub.--section/ msg.sub.--endoscopy.sub.-- -technology.asp, Copyright 2010 Olympus America Inc. [cited by applicant]
Olympus Technologies Evis Exera II, Learn About Close Focus, http://www.olympusamerica.com/msg.sub.--section/ msg.sub.--endoscopy.sub.-- -technology.asp, Copyright 2010 Olympus America Inc. [cited by applicant]
Olympus NA-11J-KB Product Data Sheet. [cited by applicant]
Optical Gels for Fiber-Optic Connectors and Splices—A Tutorial, Nye Optical Products, 6 pages. [cited by applicant]
Paxton, et al., An Experimental Investigation on the Development of Hydrogels for Optical Applications, Polymer Testing, 2003, 22(4):371-374, English Abstract. [cited by applicant]
Sigma-Aldrich Poly(2-hydroxyethyl methacrylate) Product Data Sheet, http://www.sigmaaldrich.com/catalog/Product Detail, Copyright 2010 Sigma-Aldrich Co. [cited by applicant]
Sigma-Aldrich Poly(ethylene glycol) Product Data Sheet, http://www.sigmaaldrich.com/catalog/Product Detail, Copyright 2010 Sigma-Aldrich Co. [cited by applicant]
Sigma-Aldrich Poly(vinyl alcohol) Product Data Sheet, http://www.sigmaaldrich.com/catalog/Product Detail, Copyright 2010 Sigma-Aldrich Co. [cited by applicant]
Sigma-Aldrich Methacrylic acid Product Data Sheet, http://www.sigmaaldrich.com/catalog/Product Detail, Printed Sep. 3, 2010. [cited by applicant]
SmartGel Nye Nyogel OCK-451LPH Product Data Sheet, Nye Optical Products. [cited by applicant]
Smeds, et al., Photocrosslinkable Polysaccharides for in situ Hydrogel Formation, Journal of Biomedical Materials Research, 2001, 54:115-121. [cited by applicant]
Stadler, Transparent conducting oxides—An up-to-date overview, Materials 5.4:661-683, 2012. [cited by applicant]
The Basics of Silicon Chemistry, Basic Silicon Production and Siloxane Polymerization, http://www.dowcorning.com/ content/sitech/sitechbasics/siloxane.sub.--poly- merization.asp, Copyright 2000-2010 Dow Corning Corporat… [cited by applicant]
Uw Eye Research Institute, Newsletter, Point of View, Summer 2009, http://vision.wisc.edu/news.sub.--sum09.html, Printed Feb. 5, 2010. [cited by applicant]
Vinyl Sustainability Forum 2014, Title: Benefits of PVC, Date retrieved: Mar. 7, 2014 from website: http://www.pvc.org/ en/p/benefits-of-pvc, pp. 1-4. [cited by applicant]
Zeng, et al., An Endoscope Utilizing Tunable-Focus Microlenses Actuated through Infrared Light, Solid-State Sensors, Actuators and Microsystems Conference, 2009, Transducers 2009, International, Issue 21-25, pp. 1214-12… [cited by applicant]
Zeng, et al., Tunable Liquid Microlens Actuated by Infrared Light-Responsive Hydrogel, Applied Physics Letters, 2008, 93:151101-1-151101-3. [cited by applicant]
Written Opinion of the International Searching Authority; issued in corresponding International Application No. PCT/US2021/025272, dated Aug. 24, 2021. [cited by applicant]