Oti Ophthalmic Technologies Inc.

Adrian Gh Podoleanu

John Rogers

David A Jackson

Radu G Cucu

George M Dobre

OCT apparatus includes an interferometer, having an input beam splitter and a 50/50 output splitter. The splitting ratio of the input splitter may be optimized depending on the source power of light source and on the mismatch of the balanced receiver. The input splitter is a plate beam-splitter to minimize the stray reflected light in the interferometer and allow sequential operation of the apparatus in the OCT or in the confocal regime. The switching between the two regimes may be at will, or synchronous with the en-face scanning which results in quasi-simultaneous OCT/confocal imaging or in alternatives frames, confocal and OCT. By using polarization sensitive elements, two channels are provided in each regime, OCT and confocal. The two confocal polarization sensitive channels may allow adjustments of compensators prior to OCT measurements or OCT imaging.

Optical mapping apparatus with optimized OCT configuration

A scanningdelay line for use in optical coherence tomography apparatus has a tiltable mirror, and optical convergence means for converging light incident, a dispersive element for dispersing light incident, and an optical-redirector for changing the direction of an icident beam light. The tiltable mirror, optical convergence element, said dispersive element, and optical redirector means are arranged in an optical configuration such that in sequence the dispersive element directs an input beam toward the optical convergence element, the optical convergence element directs the input beam toward the tiltable mirror, the tiltable mirror reflects the input beam as a first return beam toward the optical convergence element, the optical convergence element directs the first return beam toward the dispersive element, the dispersive element directs the first return beam toward the redirector, and the redirector redirects the first return beam toward the tiltable mirror via the optical convergence element in a direction such that the tiltable mirror reflects the first return beam toward the optical convergence optics element as a second return beam and the optical convergence element directs the second return beam toward the output port as part of an output beam bypassing the dispersive element and such that the output beam lies along substantially the same axis regardless of the angle of tilt of said tiltable mirror. The tilting said mirror varies introduces a variable optical delay into said output beam between the input and output pods. The delay line can be used in the transmission one of the arms of OCT interferometers, resulting in reduced walk-off and loss.

Transmissive scanning delay line for optical coherence tomography

An optical coherence tomography (OCT) apparatus includes an optical source, an interferometer generating an object beam and a reference beam, a transverse scanner for scanning an object with said object beam, and a processor for generating an OCT image from an OCT signal returned by said interferometer. At least the optical source, the interferometer, and the scanner are mounted on a common translation stage displaceable towards and away from said object. A dynamic focus solution is provided when the scanner and a folded object path are placed on the translation stage.

Compact high resolution imaging apparatus

The present invention relates to a multiple channel optical mapping apparatus which can deliver one or simultaneously at least two images of different depth resolutions or sequentially, images with different depth resolutions, or a combination of these images, or a single image with adjustable depth resolution. The multiple channels could be either multiple confocal channel and one or two optical coherence tomography channel, or two optical coherence tomography channels, or two confocal channels. The channels, either OCT or confocal can operate on the same wavelength or on different wavelengths. The apparatus can display both transversal as well as longitudinal images in an object, particularly the eye.

Optical mapping apparatus with adjustable depth resolution and multiple functionality

Optical mapping apparatus with adjustable depth resolution is provided. The optical mapping apparatus can display transversal images in an object, particularly the eye. The apparatus can deliver two or more images with different depth resolutions, or a combination of these images, or only one image with adjustable depth resolution. There is also provided optical mapping apparatus with adjustable depth resolution, where OCT images are corrected for the curvature at the back of the eye lens.

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Canterbury, United Kingdom

Adrian Gh Podoleanu