Surgical Microscopes Using Optical Coherence Tomography and Related Systems

An optical coherence tomography (OCT) system for integration with a microscope, the OCT system comprising:

• a sample arm coupled to the imaging path of a 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 including at least one scanning mirror and configured for telecentric scanning of the OCT signal beam;
• and
• relay optics including a beam expander configured to set the OCT signal beam diameter incident on the microscope objective;
• wherein the shape control includes separable controls for numerical aperture and focal position of the imaged OCT beam;
• wherein the microscope objective is configured to image in a visible spectral range;
• wherein the microscope objective is anti-reflection coated for a visible spectral range and an infrared spectral range;
• and
• wherein 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 microscope objective configured for imaging in a visible spectral range.