Zachary Simmons, Ph.D.
Assistant Professor
- Milwaukee WI UNITED STATES
- Physics and Chemistry
Dr. Zach Simmons is an optical physicist with experience in atomic systems, lasers, microscopy, and light-scattering.
Education, Licensure and Certification
Ph.D.
Physics
University of Wisconsin - Madision
2015
B.S.
Physics & Electrical Engineering
The University of St. Thomas
2007
Biography
https://scholar.google.com/
Areas of Expertise
Social
Selected Publications
Microscope objective based 4π spectroscopic tissues scattering goniometry
Biomedical Optics ExpressZ.J. Simmons and J.D. Rogers
2017-01-01
The measurement of optical scattering as a function of angle, goniometry, can provide a wealth of information about tissue. The goniometry technique described here measures the intensity profile at the pupil planes of two microscope objectives with a scattering sample between them. The maximum observable scattering angle is extended by employing off-axis illumination. This configuration permits several advantages including: i) rapid measurement of scattering into 4π sr to characterize the entire scattering phase function in isotropic tissue, ii) sensitivity to axially asymmetric scattering from anisotropic fibrous tissue, iii) selective interrogation of small regions within spatially inhomogenous tissue, iv) concurrent measurement of scattering coefficient μs, and v) measurement of wavelength dependent scattering properties via spectrally tunable source. The instrument is validated by comparing measurements of microsphere suspensions to the Mie scattering solution. Instrument capabilities are demonstrated with samples of rat brain and mouse eye tissues.