Dr. Kathleen Lamkin-Kennard Profile

Dr. Kathleen Lamkin-Kennard

at Rochester Institute of Technology

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Publications (3)

Proceedings Article | 17 April 2017 Presentation + Paper

Optimization study for fabrication of micro-scale stacked dielectric elastomer actuators

Mert Corbaci, Kathleen Lamkin-Kennard, Wayne Walter

Proceedings Volume 10163, 101631I (2017) https://doi.org/10.1117/12.2260086

KEYWORDS: Polymers, Composites, Silicon, Semiconducting wafers, Photomasks, Coating, Dielectric elastomer actuators, Microfabrication, Actuators, Dielectrics, Microactuators, Robotics, Aerospace engineering, Sensing systems, Electroactive polymers, Sensors

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Proceedings Article | 15 April 2016 Presentation + Paper

Microfabrication of stacked dielectric elastomer actuator fibers

Mert Corbaci, Wayne Walter, Kathleen Lamkin-Kennard

Proceedings Volume 9798, 979823 (2016) https://doi.org/10.1117/12.2219229

KEYWORDS: Actuators, Dielectrics, Microfabrication, Electroactive polymers, Dielectric elastomer actuators, Silicon, Electrodes, Semiconducting wafers, Composites, Photoresist materials

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Proceedings Article | 26 May 1997 Paper

Corneal modeling for analysis of photorefractive keratectomy

Michael Della Vecchia, Kathleen Lamkin-Kennard

Proceedings Volume 2971, (1997) https://doi.org/10.1117/12.275114

KEYWORDS: Data modeling, 3D modeling, Cornea, Ray tracing, Eye models, Zemax, Systems modeling, MATLAB, Refraction, Eye

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Procedurally, excimer photorefractive keratectomy is based on the refractive correction of composite spherical and cylindrical ophthalmic errors of the entire eye. These refractive errors are inputted for correction at the corneal plane and for the properly controlled duration and location of laser energy. Topography is usually taken to correspondingly monitor spherical and cylindrical corneorefractive errors. While a corneal topographer provides surface morphologic information, the keratorefractive photoablation is based on the patient's spherical and cylindrical spectacle correction. Topography is at present not directly part of the procedural deterministic parameters. Examination of how corneal curvature at each of the keratometric reference loci affect the shape of the resultant corneal photoablated surface may enhance the accuracy of the desired correction. The objective of this study was to develop a methodology to utilize corneal topography for construction of models depicting pre- and post-operative keratomorphology for analysis of photorefractive keratectomy. Multiple types of models were developed then recreated in optical design software for examination of focal lengths and other optical characteristics. The corneal models were developed using data extracted from the TMS I corneal modeling system (Computed Anatomy, New York, NY). The TMS I does not allow for manipulation of data or differentiation of pre- and post-operative surfaces within its platform, thus models needed to be created for analysis. The data were imported into Matlab where 3D models, surface meshes, and contour plots were created. The data used to generate the models were pre- and post-operative curvatures, heights from the corneal apes, and x-y positions at 6400 locations on the corneal surface. Outlying non-contributory points were eliminated through statistical operations. Pre- and post- operative models were analyzed to obtain the resultant changes in the corneal surfaces during PRK. A sensitivity analysis of the corneal topography system was also performed. Ray tracings were performed using the height data and the optical design software Zemax (Focus Software, Inc., Tucson, AZ). Examining pre- and post-operative values of corneal surfaces may further the understanding of how areas of the cornea contribute toward desired visual correction. Gross resultant power across the corneal surface is used in PRK, however, understanding the contribution of each point to the average power may have important implications and prove to be significant for achieving projected surgical results.

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