Dynamic Scattering Method Suppresses Speckle Noise and Aberrations in OCT Imaging
Dynamic Scattering Controls Speckle Noise and Aberrations in OCT Imaging
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Researchers have proposed using dynamic scattering to control speckle noise and aberrations in optical coherence tomography (OCT). Speckle arises from spatially coherent light; removing coherence eliminates speckle but also sacrifices interferometric imaging capabilities such as OCT. The method strikes a balance between the two to improve detail in high-resolution imaging.
Speckle noise and aberrations limit high-resolution optical imaging by obscuring the fine detail in an image. Speckle is linked to the use of spatially coherent light — without coherence, speckle disappears. But, so does the ability to perform interferometric imaging techniques like OCT, which uses coherence to select photons that carry structural information. A newly developed approach to improving OCT image resolution uses optical elements that suppress speckle and reduce sensitivity to low-order aberrations through controlled spatial-coherence modulation. To determine whether controlled changes in light scattering could reduce speckle noise and make images less prone to aberrations, researchers at the International...
Source: Photonics.com · photonics.com