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Updated: Jun 6, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
Published on: August 4, 2018
Optical deflection tomography with the phase-shifting schlieren
Didier Beghuin1, Jean-Luc Dewandel, Luc Joannes
1Lambda-X SA, 37, Rue de l'Industrie, B-1400 Nivelles, Belgium.
Abstract:
We present a new optical deflection tomography method that takes advantage of the phase-shifting schlieren. The reconstruction algorithm is based on filtered backprojection. The instrument is well adapted for three-dimensional imaging of spatially sparse objects exhibiting large refractive index variations. It achieves a 35 μm resolution with a 3 mm depth of field. Its performance is illustrated with a bundle of fibers immersed in a matching index solution.
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