摘要:
Various techniques for providing a low-cost ophthalmic imaging system, such an OCT or fundus imagers are presented. Cost is reduced by using a K-minor as a scanning component. The K-mirror is positioned at a retina conjugate. A beam splitter is positioned at the pupil conjugate and may be used to provide pupil splitting functionality. The beam splitter's shape and area conform to the focal light footprint of an illumination source such that it spans only a fraction of a collection window. 2D FFT is applied to capture spectra for purposes of selectively removing complex conjugate components and for extracting patient pupil to system collection pupil alignment. Consequently, pupil alignment is achieved by use of captured OCT data without the need for additional pupil cameras.
摘要:
A system, method, or device for imaging the anterior segment of an eye includes a contactless adapter/lens that may be attached to an existing ophthalmic imaging system to redirect the imaging system's light beam to traverse the pupil of the eye at a steep angle. In particular, the steep angle is determined to permit the ophthalmic imaging system to image zonules under the iris, and which would typically be blocked by the iris and not accessible for imaging.
摘要:
Systems and methods for improvements to optical coherence tomography systems for operating in different imaging modes are presented. In one embodiment, a system for identifying the presence and type of an adjunct lens operably connected to the OCT instrument for changing between imaging modes in the system is described. In a second embodiment, a system for dynamically autofocusing the OCT system depending on the layer of interest is presented. In a third embodiment, the overall power of the system used for imaging can be adjusted depending on the location and type of scan desired while accounting for the safety standards for recommended light exposure.
摘要:
An apparatus and a method are described which provide a range of second-order chromatic dispersion correction between a reference arm and a sample arm of an optical coherence tomographic system, while minimizing optical path length differences.
摘要:
Systems and methods are presented which allow the detection of the presence, type, and misalignment of optical components in the optical train of an optical coherence tomographic instrument to be determined from the use of OCT depth information.