Utilizing diffractions in wavefront tomography

Utilizing the Radiative Transfer Equation in Optical Tomography

We propose a method which utilizes the radiative transfer equation in optical tomography. In this approach, the radiative transfer equation is used as light propagation model in those regions in which the assumptions of the diffusion theory are not valid and the diffusion approximation is used elsewhere. Both the radiative transfer equation and the diffusion approximation are numerically solved...

Comparing wavefront-optimized to wavefront-guided LASIK

equivalent (MRSE) results were also similar, with 93% of wavefront-guided patients within 0.5 D of target, and 94% of wavefront optimized patients reaching this level. No eyes in this study lost 2 lines of BSCVA; in fact, most eyes gained BSCVA after surgery. In the wavefront-optimized group, 58% of eyes gained one line or more of vision compared with 62% of eyes in the wavefront-guided cohort....

Wavefront sensor and wavefront corrector matching in adaptive optics.

Matching wavefront correctors and wavefront sensors by minimizing the condition number and mean wavefront variance is proposed. The particular cases of two continuous-sheet deformable mirrors and a Shack-Hartmann wavefront sensor with square packing geometry are studied in the presence of photon noise, background noise and electronics noise. Optimal number of lenslets across each actuator are o...

Limited-view photoacoustic tomography utilizing backscatterers as virtual transducers

Tomographic errors from wave front healing: more than just a fast bias

Wavefront healing, in which diffractions interfere with directly traveling waves causing a reduction in recorded traveltime delays, has been postulated to cause a bias towards faster estimated Earth models. This paper reviews the theory from the mathematical physics community that explains the properties of diffractions and applies it to a suite of increasingly complicated numerical examples. W...