Common path FDOCT based on multiple reflections within the sample arm

Nikola Krstajić, Richard Hogg, Stephen J. Matcher

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We present a common path Fourier domain optical coherence tomography (FDOCT) setup where the reference signal arises from multiple reflections within the sample arm. Two configurations are demonstrated. The first is based on a reflective microscope objective while the second is based on a normal (refractive) microscope objective. The second configuration is effectively a Mireau interferometer. We present sensitivity analysis of these setups and images of in vivo skin. Advantages of both common path arrangements include: 1) the reference surface is not close to the sample surface while keeping the optical path lengths matched (so the additional interferometer is not needed) and 2) the user can independently control reference and sample arm power. Additionally, the configuration using the refractive objective ensures that the coherence gate and focus gate always match. A disadvantage is that the reference arm power in certain circumstances is not optimal (i.e. is not close to saturating the CCD). However, this issue can be removed by a light source of sufficient output power. We believe the idea is scalable and therefore of interest to endoscopy applications.

    Original languageEnglish
    Title of host publicationOptical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV
    PublisherSPIE-International Society for Optical Engineering
    Number of pages8
    Volume7889
    ISBN (Print)9780819484260
    DOIs
    Publication statusPublished - 2011
    EventOptical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV - San Francisco, CA, United States
    Duration: 24 Jan 201126 Jan 2011

    Conference

    ConferenceOptical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV
    CountryUnited States
    CitySan Francisco, CA
    Period24/01/1126/01/11

    Keywords

    • common path interferometers
    • Fourier domain optical coherence tomography
    • optical coherence tomography

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  • Cite this

    Krstajić, N., Hogg, R., & Matcher, S. J. (2011). Common path FDOCT based on multiple reflections within the sample arm. In Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV (Vol. 7889). [78892K] SPIE-International Society for Optical Engineering. https://doi.org/10.1117/12.874669