SPECTRAL IMAGING WITH A COLOR WHEEL

摘要

A spectral imaging apparatus includes an image sensor positioned to capture images of a target, a rotating color wheel aligned with the image sensor, and a projector positioned to project overlay images onto the target. The color wheel can include one or more filter segments, each allowing light of a different range of wavelengths to pass. The color wheel can further include a blocking or opaque segment. A set of captured images of the different wavelengths can be processed to generate a false-color overlay image for projection onto the target. Processing of overlay images can be performed when the blocking or opaque segment is in front of the image sensor. The spectral imaging apparatus may be a multi-spectral imaging apparatus and made be used in the medical fields, such as for determining and indicating tissue oxygenation. Video rates can be achieved.

主权项

1. A spectral medical imaging apparatus comprising:
an illumination device arranged to illuminate a target tissue; an image sensor arranged to capture light reflected from the target tissue along an imaging optical path; a color wheel aligned with the image sensor on the imaging optical path, the color wheel configured to rotate at a predetermined frequency, the color wheel comprising at least one filter segment and at least one blocking segment; a projector arranged to project overlay images along a projecting optical path and onto the target tissue, the projecting optical path at least partially overlapping the imaging optical path; and a processor connected to the image sensor and the projector, the processor configured to generate the overlay images from light captured by the image sensor and to provide the overlay images to the projector for projection when the blocking segment blocks the imaging optical path.