Common path systems and methods for frequency domain and...

Details Common path systems and methods for frequency domain and... Common path systems and methods for frequency domain and...

2007-09-05

2010-10-26

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

Reexamination Certificate

active

07821643

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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International Search Report and Written Opinion for International Application No. PCT/US07/77706 dated Mar. 24, 2008.

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