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X-WR-CALNAME;VALUE=TEXT:糖心原创
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DTSTART:20191103T020000
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DTSTART:20200308T020000
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UID:calendar.385046.field_event_date.0@www.wright.edu
DTSTAMP:20260219T180532Z
CREATED:20200130T161847Z
DESCRIPTION:Lt Col Samuel D. Butler\, Ph.D.\, USAFAssistant Professor of Ph
 ysicsDepartment of Engineering PhysicsAir Force Institute of TechnologyOpt
 ical scatter--transmission\, reflection\, and absorption/emission--are fun
 damental physical processes of use in remote sensing\, scene generation\, 
 metamaterials\, and reflective inverse diffusion. In this presentation\, a
  brief overview of scatter in general is provided\, followed by a brief di
 scussion of metamaterials (thin lenses) and reflective inverse diffusion (
 making rough surface scatter appear polished). Then\, a more thorough disc
 ussion of a recent collaboration between 糖心原创 and the A
 ir Force Institute of Technology on researching the bidirectional reflecta
 nce distribution function (BRDF) is discussed. The BRDF describes optical 
 scattering off realistic surfaces. The microfacet BRDF\, while computation
 ally simple\, lacks accuracy especially for grazing angles. An approximati
 on\, which replaces mathematically problematic elements of the microfacet 
 model with the polarization factor from wave optics\, has proved useful in
  accurately modeling the grazing region. This analysis is expanded upon by
  additionally varying the microfacet distribution function鈥攁 fundamental p
 art of microfacet BRDF models. In these modified results\, after choosing 
 the best microfacet distribution\, 12 of the 18 materials studied show a s
 ignificant improvement in the BRDF fit at grazing angles.Professional Biog
 raphy: Samuel Butler is currently a Lieutenant Colonel in the United State
 s Air Force. He obtained a Bachelor's Degree in Applied Physics with a Com
 puter Science Emphasis from Brigham Young University in 2004\, a Master鈥檚 
 Degree in Applied Physics from the Air Force Institute of Technology in 20
 10\, and a Doctoral Degree in Engineering Physics from the Air Force Insti
 tute of Technology in 2015. Lieutenant Colonel Butler has served at Minot 
 Air Force Base\, North Dakota\; Fort Meade\, Maryland\; and Eglin Air Forc
 e Base\, Florida. He also has been deployed to Southwest Asia in 2011 and 
 2016. Lieutenant Colonel Butler is currently an Assistant Professor of Phy
 sics at the Air Force Institute of Technology\, Wright-Patterson Air Force
  Base\, Ohio. He is here to talk to us about applications of the physics o
 f optical scatter in remote sensing\, scene generation\, metamaterials\, a
 nd reflective inverse diffusion.
DTSTART;TZID=America/New_York:20200205T122000
DTEND;TZID=America/New_York:20200205T131500
LAST-MODIFIED:20200130T170211Z
LOCATION:Oelman 132
SUMMARY:Physics Seminar: Applications of Optical Scatter in Remote Sensing\
 , Scene Generation\, Metamaterials\, and Reflective Inverse Diffusion
URL;TYPE=URI:/events/physics-seminar-applications-opt
 ical-scatter-remote-sensing-scene-generation-metamaterials
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