Extending the performance of linear and nonlinear spatial frequency modulated imaging platforms (Conference Presentation)

2018 ◽  
Author(s):  
Jeffrey A. Squier ◽  
Nathan Worts ◽  
Alyssa Allende Motz ◽  
Jeff Field ◽  
Keith Wernsing ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Linear And Nonlinear ◽  
Modulated Imaging

Modulated imaging: quantitative analysis and tomography of turbid media in the spatial-frequency domain

2005 ◽  
Vol 30 (11) ◽  
pp. 1354 ◽  
Author(s):  
David J. Cuccia ◽  
Frederic Bevilacqua ◽  
Anthony J. Durkin ◽  
Bruce J. Tromberg
Keyword(s):  
Quantitative Analysis ◽  
Spatial Frequency ◽  
Frequency Domain ◽  
Turbid Media ◽  
Modulated Imaging ◽  
Spatial Frequency Domain

Linear and nonlinear components of human electroretinogram

1984 ◽  
Vol 51 (5) ◽  
pp. 952-967 ◽  
Author(s):  
C. L. Baker ◽  
R. F. Hess
Keyword(s):  
Steady State ◽  
Spatial Frequency ◽  
Step Response ◽  
Linear Component ◽  
Fast Wave ◽  
Uniform Field ◽  
Nonlinear Component ◽  
Symmetric Component ◽  
Linear And Nonlinear ◽  
Nonlinear Components

We compared electroretinographic (ERG) responses to uniform-field and a variety of pattern stimuli using both transient and steady-state analyses. Evidence is provided that for all of these stimuli, the peak at high temporal frequencies in the steady-state response corresponds to the fast wave of the transient response and that the peak at low temporal frequencies corresponds to the slow wave of the step response. A variety of contrast-modulated grating stimuli were used to demonstrate that the fast, high-frequency response can be regarded as the sum of two components, an "odd-symmetric" component, which behaves linearly and is independent of spatial frequency, and an "even-symmetric" component, which behaves nonlinearly and has a band-pass spatial-frequency dependence. The prevailing distinction that is made between pattern and uniform-field ERGs is a consequence of the fact that the uniform-field ERG is dominated by the odd-symmetric (linear) component, whereas the so-called pattern (contrast reversal) ERG reveals the even-symmetric (nonlinear) component in isolation. Since a uniform field can also drive the nonlinear component, the present dichotomy ("luminance" versus "pattern") can be better understood in terms of the linear and nonlinear components of the response rather than in terms of the stimuli that produce them.

scholarly journals Two-dimensional random access multiphoton spatial frequency modulated imaging

2020 ◽  
Vol 28 (1) ◽  
pp. 405
Author(s):  
Alyssa M. Allende Motz ◽  
John Czerski ◽  
Daniel E. Adams ◽  
Charles Durfee ◽  
Randy Bartels ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Random Access ◽  
Two Dimensional ◽  
Modulated Imaging

Spatial Frequency Modulated Imaging (SPIFI) with amplitude or phase grating from a spatial light modulator

2017 ◽  
Author(s):  
Michael D. Young ◽  
Emerson C. Barbano ◽  
Nathan Worts ◽  
Jeffrey J. Field ◽  
Christopher Hoy ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Spatial Light Modulator ◽  
Light Modulator ◽  
Phase Grating ◽  
Modulated Imaging

Theory of diffraction effects in spatial frequency-modulated imaging

2012 ◽  
Vol 29 (12) ◽  
pp. 2579 ◽  
Author(s):  
Daniel J. Higley ◽  
David G. Winters ◽  
Gregory L. Futia ◽  
Randy A. Bartels
Keyword(s):  
Spatial Frequency ◽  
Modulated Imaging ◽  
Diffraction Effects

Lateral tomographic spatial frequency modulated imaging

2011 ◽  
Vol 98 (21) ◽  
pp. 211115 ◽  
Author(s):  
Philip Schlup ◽  
Greg Futia ◽  
Randy A. Bartels
Keyword(s):  
Spatial Frequency ◽  
Modulated Imaging
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