Common path systems and methods for frequency domain and time domain optical coherence tomography using non-specular reference reflection and a delivering device for optical radiation with a partially optically transparent non-specular reference reflector
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United States of America Patent
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Oct 26, 2010
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Sep 5, 2007
filing date -
Sep 6, 2006
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Abstract
Provided are common path frequency domain and time domain OCT systems and methods that use non-specular reference reflection for obtaining internal depth profiles and depth resolved images of samples. Further provided is a delivering device for optical radiation, preferably implemented as an optical fiber probe with a partially optically transparent non-specular reflector placed in the vicinity of an associated sample. High frequency fringes are substantially reduced and a stable power level of the reference reflection is provided over the lateral scanning range. The partially optically transparent non-specular reflector is implemented as a coating placed on the interior surface of the optical probe window including spots of a metal, or a dielectric coating, separated by elements of another coating or just spaces of a clean substrate. In an alternative embodiment, the scattering elements are made 3-dimensional, having, for example, a spherical shape.
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