Tomey Corporation

Tsutomu Ohmori

Chihiro Kato

Naoko Hara

Yuji Nozawa

Franck E M Jaillon

Masahiro Yamanari

Satoshi Sugiyama

Nobuyori Aoki

Franck Em Jaillon

A speed measuring device with an optical coherence tomography is provided. The speed measuring device includes an optical coherence tomography that obtains an tomographic image of a sample, a motion contrast calculator, a waveform creator that creates a motion contrast wave indicating chronological change of motion contrast, a time lag calculator, a distance calculator that calculates the blood vessel distance in a sample, and a speed calculator that calculates speed of a pulse wave transmitted inside the blood vessel.

Speed measuring device, speed measuring method, and recording medium

An ophthalmologic apparatus comprises a light source, an optical measurement systemthat radiates first light from the light source to inside an eye to be examined and guides first reflected light from the eye, an optical reference system () that radiates second light from the light source to a reference surface and guides second reflected light from the reference surface, a photo detectorthat detects interfering light between the first reflected light from the optical measurement system and the second reflected light from the optical reference system, and a processor that determines a position of a measuring portion of the inside of the eye based on the detected interfering light. The optical measurement system comprises an incident angle changing memberthat changes an incident angle of the first light radiated to the eye within a predetermined angular range relative to an axis of vision of the eye.

Ophthalmologic apparatus for measuring position of measuring portion inside eye

An optical coherence tomography includes a light source, a light separator, a light generator configured to generate interference light, a detector configured to detect the interference light, a first optical element, and at least one of second optical elements comprising a pair of surfaces, and performs forming a tomographic image of a subject. The first optical element is arranged on a measurement light path so as to be closest to the subject, and satisfies at least one of following conditional formulas:&#x2212;()&#x3c;&#x2212;2&#x2003;&#x2003;[a2]&#x2212;2; and&#x2003;&#x2003;[b1]&#x2212;2&#x2003;&#x2003;[c2]

Optical coherence tomography

Optical coherence tomography (OCT) apparatuses and methods include a first electro-magnetic radiation (EMR) source providing EMR to a first optical path associated with a sample and a second optical path associated with a reference. A multi-beam generator unit (MBGU) generates first and second EMR beams having different wavelength contents. A scanning system illuminates the sample with the first and second EMR beams, at a first and second time, at a first and second location. An interference module generates interference signals based on received EMR returning from the reference and the first and second EMR beams returning from the sample. A detector generates detection signals based on received interference signals and a processor generates OCT data based on the processed detection signals. In some embodiments, three EMR beams having different wavelength contents with linearly independent vectors illuminate at least one same location of the sample.

Wavelength encoded multi-beam optical coherence tomography

An ophthalmic device capable of obtaining B-scan graphical images at high speed while eliminating positional displacement due to movement of a subject eye. The device includes: anterior eye image obtaining means configured to obtain an image of an anterior eye of a subject eye; eye fundus image obtaining means configured to obtain an image of an eye fundus of the subject eye; and control means configured to detect a moving distance of the subject eye in the anterior eye image using means configured to calculate correlation between a moving distance of the subject eye in the anterior eye image and a moving distance in the eye fundus image, and to control a position for imaging of the eye fundus image based on the detected moving distance of the subject eye and the calculated correlation.

Ophthalmic device and method for controlling the same

An optical coherence tomography apparatus includes a multi-beam configuration unit comprising at least a first optical path having a first numerical aperture and a second optical path having a second numerical aperture. The multi-beam configuration unit orients the second optical path in a selected orientation in space relative to the first optical path. A scan system illuminates a sample with non-polarized light received from the multi-beam configuration unit and directs light returning from the sample to the first optical path and the second optical path. The multi-beam configuration unit directs light returning from the sample, along the first optical path and the second optical path, to an optical pathway leading to a processing system. The processing system performs optical coherence tomography motion analysis based on interference between light returning from the sample and a first reference signal.

Growing community of inventors

Nagoya, Japan

Tsutomu Ohmori