Its key customers for machine vision applications include Carl Zeiss Meditec, Canon and Optopol in the optical coherence tomography (OCT) and ophthalmology markets, and Orbotech and Basler for electronics

A spectral domain optical coherence tomography (SD-OCT) system including: at least two super luminescent diodes (SLDs); a photoreceptor including a sensor and a spectrometer to acquire information on a target; a combiner to combine emitted beams from the SLDs and to guide the beams to the photoreceptor; a monitor to monitor the spectra of the emitted beams from the SLDs; a driver to drive the SLDs; and a controller to feedback the monitor output to the driver which has driving periods during each of which only one-to-one corresponding SLD is driven. The spectral shape of the emitted beams can be ...

A light irradiation apparatus includes an optical power acquiring unit configured to acquire an optical power of light emitted by a light source and with which an object is irradiated; an optical power adjusting unit configured to adjust the optical power of light emitted by the light source to a predetermined optical power in accordance with an acquisition result obtained by the optical power acquiring unit; and an irradiation unit configured to irradiate the object with the light that is adjusted by the optical power adjusting unit.

There is provided an optical tomographic imaging apparatus for imaging a tomographic image capable of setting characteristics of an optical system to accommodate to different positions on an object. The apparatus using an OCT system, includes: a scanning device for scanning measuring beams, an irradiating device for irradiating a different irradiation area on the object with the measuring beams scanned by the scanning device, an adjusting device for adjusting an irradiation position on the object of the measuring beams irradiated by the irradiating device, and a detecting device for detecting each combined beam produced from light interference between each of ...

An optical coherence tomography method according to the present invention comprising the steps of dividing an object to be measured into a plurality of measurement regions adjacent to one another in a direction of irradiation of a measurement light, and acquiring a measurement image for every measurement region based on a wavelength spectrum of a coherent light and acquiring a tomographic image for every measurement region by removing a mirror image of a tomographic image of an adjacent region being adjacent to the measurement region of the measurement image from the measurement image.

An adaptive optical apparatus includes a wavelength separation unit configured to separate a beam emitted from a light source into a plurality of wavelength band beams, a plurality of light modulation units configured to modulate the respective plurality of wavelength band beams, a wavelength combining unit configured to combine the beams modulated by the plurality of light modulation units into a beam, and an illumination unit configured to illuminate a measured object with the beam output from the wavelength combining unit.

In an optical tomographic imaging apparatus in which a tomographic image is acquired using an interference light between a return beam of a first measuring beam and a first reference beam traveling on a beam path having first beam path length changing unit thereon, an optical interferometer detects movement of the inspection object by using an interference light between a return beam of a second measuring beam from a movement detection position and a second reference beam traveling on a beam path having second beam path length changing unit thereon; and positional misplacement correcting unit changes the beam path length ...

Purpose. We presented a novel polarization sensitive optical coherence tomography (PS-OCT) system for measuring retinal nerve fiber layer (RNFL) birefringence, retardation, and thickness, and report on the repeatability of acquiring these quantities. Methods. A new PS-OCT system, measuring at 840 nm, was developed that supports scan angles of up to 40° × 40° with an A-scan rate of 70 kHz. To test the performance and reproducibility, we measured 10 eyes of 5 healthy human volunteers five times each. All volunteers were imaged further with scanning laser polarimetry (SLP). The obtained RNFL birefringence, retardation, and thickness maps were averaged, and standard deviation ...

Measuring light with a wide wavelength band is used to provide a tomographic image excellent in vertical resolution. An optical coherence tomography apparatus acquiring a tomographic image of an object to be inspected based on an interference light obtained by causing a return light from a measuring light emitted onto the object to be inspected to interfere with a reference light corresponding to the measuring light, includes: a first dispersion compensation unit having a first dispersion compensation characteristic in a wavelength band of the measuring light; a second dispersion compensation unit provided onto the first dispersion compensation unit and having ...

Optical coherence tomography has been an unqualified success in the area of ophthalmology. As recently noted by OCT pioneer Dr. Carmen Puliafito, “OCT has revolutionized the treatment of eye diseases on a global basis and it is now routinely used to make clinical decisions about treating patients with blinding diseases such as macular degeneration, diabetic retinopathy, and glaucoma”. Over the past decade the market for ophthalmic OCT systems has grown tremendously and is now over $300M/year; there are ~14 companies making ophthalmic OCT instruments and more on the way; new impressive product features continue to be rolled out; nearly ...

A connection adapter constituting an optical tomographic imaging apparatus has a small installation space and high use efficiency. The connection adapter is disposed between a fundus camera main body portion and a camera portion to be attached to the fundus camera main body portion for imaging a surface image of a fundus as an object in an optical tomographic imaging apparatus, and connects them in a detachable manner. The connection adapter includes: a first light guide unit for guiding tomographic image measuring beams guided from the fundus camera main body portion for imaging the tomographic image to a tomographic imaging ...

A three-beam spectral domain optical coherence tomography system (OCT) whose center wavelength is 840 nm was developed. The three beams focus on fundus 3.1 mm apart from each other and are detected by a single line sensor. The distance between the beams is fixed and the beams scan a total area of 10 × 10     mm 2 while keeping this separation during three-dimensional (3-D) measurement. The line rate of the sensor is 70 kHz, therefore the total speed is equivalent to 210k A-scans per second in this system. A 1000 ( x ) × 500 ( z ) × 250 ( y ) voxel volumetric 3D OCT data ...

Provided is an optical tomographic imaging apparatus which enables simplification and cost reduction without reducing accuracy when moving part of an object is moved in an optical axis direction of measuring beam. The apparatus using return beam of measuring beam reflected or scattered by an object and reference beam reflected by a reference mirror to image the tomographic image, includes: a reflecting position controlling device for controlling the reflecting position of the reference mirror; a detecting device for a position in a moving part having an optical system for observing the moving part illuminated by an optical system imaging the ...