Abstract: 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.

Abstract: A beam diameter varying portion varies a first beam diameter of a measuring beam incident on an optical portion to a second beam diameter larger than the first beam diameter. An adjustment portion adjusts a condensing position of the measuring beam on the optical portion based on intensity information of a return beam from a position of an inspection object with the first beam diameter. The beam diameter is varied from the first to the second beam diameter by the beam diameter varying portion at the position adjusted by the adjustment portion to cause the measuring beam having the second beam diameter to be incident. A condensing position can be adjusted in a relatively short time because the measuring beam small in beam diameter is used, and a combined beam can be acquired with high transverse resolution because the measuring beam large in beam diameter is used.

Abstract: 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.

Abstract: Provided is an ophthalmologic imaging apparatus required by the position adjustment of a fixation lamp to be turned on, by a simple operation which includes: a scanning unit; an irradiation unit for irradiating an eye to be inspected with a measuring beam through the scanning unit; a fixation lamp; a lighting position changing unit for changing a lighting position of the fixation lamp; an optical path length difference changing unit for changing an optical path length difference between the measuring beam and a reference beam corresponding to the measuring beam based on the lighting position of the fixation lamp which is changed by the lighting position changing unit; and an acquisition unit for acquiring a tomographic image of the eye to be inspected based on a beam obtained by superimposing, on the reference beam, a return beam from the eye to be inspected, which is irradiated with the measuring beam.

Abstract: An optical tomographic imaging method is provided in which light from a light source is split into a measuring beam and a reference beam, the measuring beam being moved by a scanning optical system and guided to an object to be examined, the reference beam being guided to a reference mirror, and in which a tomogram of the object is generated from a return beam of the measuring beam reflected or scattered by the object and the reference beam reflected by the reference mirror. The method includes acquiring longitudinal sectional information on the object, calculating depth-position information on the object from the longitudinal sectional information, and acquiring a three-dimensional surface image of the object by controlling a reference-path length defined by the reference mirror and a scanning operation of the scanning optical system in accordance with the depth-position information on the object.

Abstract: An image acquisition apparatus irradiates light from a light source to an inspection object, obtains a tomographic image of the inspection object on the basis of a combined beam obtained by combining a return beam from the inspection object due to the irradiated light and a reference beam corresponding to the light, and obtains a plane image of the inspection object on the basis of the return beam from the inspection object due to the irradiated light. The apparatus performs a first scanning process to main-scan the irradiated light when the tomographic image is obtained, performs a second scanning process to main-scan the irradiated light at a speed higher than that in the first scanning process when the plane image is obtained, and performs a third scanning process to sub-scan the irradiated light when each of the tomographic image and the plane image is obtained.

Abstract: 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 portion; and a second light guide unit for guiding fundus image measuring beams guided from the fundus camera main body portion for imaging the surface image of the fundus to the camera portion.

Abstract: An image acquisition apparatus that uses optical coherence tomography includes a scanning unit provided within a light path that guides signal light to be incident on an examination object towards the examination object and configured to scan the signal light in a main scanning direction; and a control unit configured to control the scanning unit such that an integration time of an optical interference signal per pixel in at least one predetermined area other than opposite ends, in the main scanning direction, of an image acquisition region scanned by a plurality of main scan lines is increased relative to that of an area other than the predetermined area.

Abstract: An ophthalmologic apparatus includes an irradiation unit irradiating a subject's eye with a measuring beam emitted by a scanning unit that performs scanning, a first acquisition unit acquiring a first image of the subject's eye based on the returned measuring beam from the subject's eye when the scanning unit performs scanning in a first sub scanning direction, a second acquisition unit acquiring a second image of the subject's eye based on the returned measuring beam travelling from the subject's eye, at timing different from that for the first image, while the scanning unit performs scanning in a second sub scanning direction opposite to the first sub scanning direction, and a calculation unit calculating blood flow velocity of the subject's eye based on a blood cell position in the first image, a blood cell position in the second image, and the sub scanning direction of the scanning unit.

Abstract: An ophthalmic apparatus includes an irradiation unit configured to irradiate a subject's eye with a measurement beam scanned by a scanning unit, an acquisition unit configured to acquire an image of the subject's eye based on a return beam returned from the subject's eye, of the measurement beam irradiated by the irradiation unit, and a calculation unit configured to calculate a blood flow velocity of the subject's eye based on a displacement between a position of a blood cell in a first image obtained by the acquisition unit and a position of the blood cell in a second image obtained by the acquisition unit at a different time from the first image and on a difference between time when an image of the blood cell in the first image is obtained and time when an image of the blood cell in the second image is obtained.

Abstract: An adaptive optics apparatus includes a first conversion unit configured to convert a polarization direction of one of two polarization components of light to a polarization direction of the other of the polarization components, the light being emitted by a light source; a light modulation unit configured to modulate the two polarization components of light converted by the first conversion unit in the polarization directions that have been converted; a second conversion unit configured to convert directions of polarization components of the light modulated by the light modulation unit to directions that intersect with each other; and an irradiation unit configured to irradiate the object with the light that is converted by the light modulation unit.

Abstract: To provide an optical imaging apparatus capable of providing a high lateral resolution in a wide region and easily adjusting prior to imaging for imaging an optical image of an eye to be inspected which is an object, and a method for imaging an optical image. The optical imaging apparatus in which a beam from a light source is used as a measuring beam, and an image of an object is imaged based on intensity of a return beam formed of the measuring beam irradiated to the object has the following: first, an optical device for focusing the measuring beam on the object; next, a aberration detecting device for measuring a aberration of the return beam; and a focus adjusting device for adjusting the optical device based on the aberration detected by the aberration detecting device.

Abstract: Provided is an optical tomographic imaging apparatus that, at imaging a tomographic image in an OCT system with a high lateral resolution, can more reduce blurring in the image due to movement of an object, including: a scanning device for scanning, on the object, a first irradiation beam having a large spot diameter and a second irradiation beam having a small spot diameter synchronized with each other, an image information acquiring device for acquiring first and second image information obtained with the irradiation beams, respectively, by scanning the first and second irradiation beams, and a position correcting device for identifying a position of the first image information based on reference image information acquired in advance, and, based on correlation of a positional relation between the first and second image information, correcting a position of the second image information by associating the position with the identified first image information's position.

Abstract: Provided is an optical tomographic imaging apparatus capable of, when imaging a tomographic image of an object, monitoring an incident state represented by an incident position and an incident angle of a measuring beam group with respect to the object, causing the measuring beam group to form an image at a predetermined position of the object, and obtaining the tomographic image at high speed. The optical tomographic imaging apparatus is featured in that one of multiple beams emitted from a light source to be split and multiple beams emitted from multiple light sources are split into a measuring beam group and a reference beam group, and the optical tomographic imaging apparatus includes a monitoring device for obtaining a monitoring image of the object, thereby capable of monitoring an incident state represented by an incident position and an incident angle of the measuring beam group with respect to the object.

Abstract: Provided are an optical tomographic imaging apparatus and an imaging method for an optical tomographic image, in which high measurement sensitivity and high lateral resolution of a specific portion of an object may be obtained with a simple structure. The optical tomographic imaging apparatus of a Fourier-domain method includes: an optical path length adjustment portion for adjusting an optical path length of the reference beam; a position adjustment portion for adjusting a position of a focusing device for focusing the measuring beam onto the object; and a drive control portion for controlling drive of the optical path length adjustment portion and the position adjustment portion. The drive control portion is controlled based on information from a layer constituting a cross section from cross section information that is obtained in advance for a portion to be imaged of the object.

Abstract: An image acquisition apparatus that uses optical coherence tomography includes a scanning unit provided within a light path that guides signal light to be incident on an examination object towards the examination object and configured to scan the signal light in a main scanning direction; and a control unit configured to control the scanning unit such that an integration time of an optical interference signal per pixel in at least one predetermined area other than opposite ends, in the main scanning direction, of an image acquisition region scanned by a plurality of main scan lines is increased relative to that of an area other than the predetermined area.

Abstract: An optical tomographic imaging method is provided in which light from a light source is split into a measuring beam and a reference beam, the measuring beam being moved by a scanning optical system and guided to an object to be examined, the reference beam being guided to a reference mirror, and in which a tomogram of the object is generated from a return beam of the measuring beam reflected or scattered by the object and the reference beam reflected by the reference mirror. The method includes acquiring longitudinal sectional information on the object, calculating depth-position information on the object from the longitudinal sectional information, and acquiring a three-dimensional surface image of the object by controlling a reference-path length defined by the reference mirror and a scanning operation of the scanning optical system in accordance with the depth-position information on the object.

Abstract: A potential measurement apparatus for measuring a surface potential of an object of measurement detects a change in electric charge induced at a detection electrode due to electrostatic induction by changing a distance between the detection electrode and the object of measurement in accordance with a predetermined period, using a neutral distance as reference, as a signal representing a change in electric current.

Abstract: An optical coherence tomographic imaging apparatus which has a light intensity varying portion provided on a first optical path for guiding a measuring beam to an object for varying an intensity of the measuring beam; an illumination condition varying portion for varying an illumination condition of the measuring beam that has passed through the light intensity varying portion for the object between a first illumination condition in which a center part of the measuring beam is not blocked and a second illumination condition in which the center part of the measuring beam is blocked; and an image forming portion for weighting a first tomographic image acquired in the first illumination condition and a second tomographic image acquired in the second illumination condition and composing the weighted first second tomographic images to form a third tomographic image.

Abstract: An optical tomographic imaging method is provided in which light from a light source is split into a measuring beam and a reference beam, the measuring beam being moved by a scanning optical system and guided to an object to be examined, the reference beam being guided to a reference mirror, and in which a tomogram of the object is generated from a return beam of the measuring beam reflected or scattered by the object and the reference beam reflected by the reference mirror. The method includes acquiring longitudinal sectional information on the object, calculating depth-position information on the object from the longitudinal sectional information, and acquiring a three-dimensional surface image of the object by controlling a reference-path length defined by the reference mirror and a scanning operation of the scanning optical system in accordance with the depth-position information on the object.