Surgical microscopes using optical coherence tomography and related systems

摘要

Some embodiments of the present inventive concept provide optical coherence tomography (OCT) systems for integration with a microscope. The OCT system includes a sample arm coupled to the imaging path of a microscope. The sample arm includes an input beam zoom assembly including at least two movable lenses configured to provide shape control for an OCT signal beam; a scan assembly including at least one scanning mirror and configured for telecentric scanning of the OCT signal beam; and a beam expander configured to set the OCT signal beam diameter incident on the microscope objective. The shape control includes separable controls for numerical aperture and focal position of the imaged OCT beam.

主权项

1. An optical coherence tomography (OCT) system for integration with a stereo microscope, the OCT system comprising:
a sample arm coupled to the imaging path of a stereo microscope, the sample arm comprising:
an input beam zoom assembly including at least two movable lenses configured to provide shape control for an OCT signal beam;a scan assembly following the input beam zoom including at least one scanning mirror and configured for telecentric scanning of the OCT signal beam; andrelay optics following the scan assembly including a beam expander configured to set the OCT signal beam diameter incident on the stereo microscope main objective;a dichroic beamsplitter positioned within an infinity space of the stereo microscope and between the relay optics and the stereo microscope main objective;wherein the shape control includes separable controls for numerical aperture and focal position of the imaged OCT beam that operate by coordinated motion of the movable lenses within the input beam zoom assembly;wherein the stereo microscope main objective is configured to image in a visible spectral range;wherein the stereo microscope main objective is anti-reflection coated for a visible spectral range and an infrared spectral range; andwherein the relay optics including a beam expander comprises optics to pre-compensate aberration of the OCT signal beam in an infrared spectral range arising from the stereo microscope main objective configured for imaging in a visible spectral range.