Patent application number | Description | Published |
20110064470 | LIGHT DEFLECTOR DEVICE AND IMAGE FORMING APPARATUS - A light deflector device includes a light deflector having an oscillation system, a driving unit for driving the oscillation system and a drive controlling unit for supplying a drive signal. The oscillation system simultaneously generates a first oscillating motion of a first frequency and a second oscillating motion of a second frequency. The drive controlling unit supplies a drive signal formed by synthetically combining a first signal having the first frequency and a second signal having the second frequency to the driving unit and, at the same time, another drive signal for changing at least the amplitude of the first oscillating motion, the amplitude of second oscillating motion or the relative phase difference of the first oscillating motion and the second oscillating motion to the driving unit in order to correct an offset of scanning light deflected by the light deflector. | 03-17-2011 |
20110270071 | MEASURING APPARATUS - In photoacoustic imaging, in cases where an emitted light amount and a beam pattern of a laser vary according to variation with time and external factors, and cases where the wavelength and the repetition rate of the laser vary, there is a danger that a light fluence of light applied to tissue become too strong. A unit is provided for measuring a distribution of light fluence of light applied to the tissue. A measuring apparatus is provided that controls output of a laser source such that the measured light fluence should not exceed the maximum permissible exposure to the tissue. Accordingly, highly safe photoacoustic imaging to the tissue can be realized. | 11-03-2011 |
20110303015 | PHOTOACOUSTIC MEASURING APPARATUS - A photoacoustic measuring apparatus includes a light source, a movable holding unit which holds an object, a light diffusing unit which fixes the distance between the light diffusing unit and the holding unit and diffuses light incident from the light source, and an acoustic wave obtaining unit which obtains an acoustic wave generated from the object by the light emitted via the holding unit and the light diffusing unit. | 12-15-2011 |
20130061678 | OBJECT INFORMATION ACQUIRING APPARATUS AND OBJECT INFORMATION ACQUIRING METHOD - This invention employs an object information acquiring apparatus including a probe for receiving, as a received signal, an acoustic wave which is generated within an object irradiated with light and propagates on an object surface, and a processor for generating object information, which is information based on an internal optical characteristic value of the object, by using intensity of the received signal. The processor corrects the intensity of the received signal by using the reflectance upon the acoustic wave entering the probe which is calculated based on the angle of the acoustic wave entering the probe, and on the acoustic impedance and acoustic velocity of the object and the probe. | 03-14-2013 |
20130112001 | ACOUSTIC WAVE DETECTOR AND ACOUSTIC WAVE MEASUREMENT APPARATUS - An acoustic wave detector includes: a transducer; and a light reflecting member which is positioned between the transducer and a subject surface that is irradiated with the light, and which reflects scattered light on the subject surface. The light reflecting member includes a first reflecting surface and a second reflecting surface positioned closer to the transducer than the first reflecting surface, and a distance between the first reflecting surface and the second reflecting surface is an odd multiple of a half wavelength of a predetermined wavelength included in an acoustic wave generated from the light reflecting member by the scattered light. | 05-09-2013 |
20130231549 | OBJECT INFORMATION ACQUIRING APPARATUS - The present invention employs an object information acquiring apparatus that includes a light source, a holding plate configured to hold an object, a supporting unit configured to support the holding plate, and a probe configured to receive, via the holding plate, an acoustic wave generated from the object on which light is irradiated from the light source. A light reflecting member is provided between the supporting unit and the holding plate. | 09-05-2013 |
20130331680 | OBJECT INFORMATION ACQUIRING APPARATUS AND OBJECT INFORMATION ACQUIRING METHOD - Disclosed is an object information acquiring apparatus including: a receiver that includes a plurality of elements and converts an acoustic wave generated from an object irradiated with light into a received signal, and outputs the received signal in a time series; a normalizer that generates a normalized signal by normalizing the intensity of the received signal; and a processor that generates, from the normalized signal, first image data that indicates the distribution of property information inside the object. | 12-12-2013 |
20140064030 | OBJECT INFORMATION ACQUIRING APPARATUS - An object information acquiring apparatus is used that includes: a light source; a bundle fiber including a plurality of optical fibers; and a processor using an acoustic wave that is generated when light is irradiated on an irradiated surface of an object from an outputting unit of the bundle fiber, and acquiring information from the object, wherein outputting edges of a plurality of sub-bundles, each sub-bundle including a plurality of optical fibers, are arranged in the outputting unit of the bundle fiber, the plurality of sub-bundles include a first sub-bundle arranged in a central part of the outputting unit and a second sub-bundle arranged in a peripheral part of the outputting unit, and the number of optical fibers per unit area of the first sub-bundle is smaller than the number of optical fibers per unit area of the second sub-bundle. | 03-06-2014 |
20140123762 | LASER APPARATUS AND PHOTOACOUSTIC APPARATUS USING LASER APPARATUS - A laser apparatus comprises a cavity having an output unit, and a branch unit arranged between the output unit and first and second reflection unit, an optical path in the cavity including a common part and separate parts, respectively; a laser medium and a wavelength filter disposed in the common part; a pump unit configured to pumping the laser medium; and first and second shielding units respectively disposed in the first and second separate parts, the transmittance of the wavelength filter is varied based on the wavelength and polarization of incident light, the branch unit splits a light beam into the first polarized light and the second polarized light, and one of the first and second shielding units being opened and the other closed to select one of the wavelengths of light to be emitted. | 05-08-2014 |
20140194724 | PHOTOACOUSTIC MEASURING APPARATUS - A photoacoustic measuring apparatus includes a light source, a movable holding unit which holds an object, a light diffusing unit which fixes the distance between the light diffusing unit and the holding unit and diffuses light incident from the light source, and an acoustic wave obtaining unit which obtains an acoustic wave generated from the object by the light emitted via the holding unit and the light diffusing unit. | 07-10-2014 |
Patent application number | Description | Published |
20080266632 | OPTICAL DEFLECTOR AND OPTICAL INSTRUMENT USING THE SAME - An optical deflector includes an oscillating system and a driving system for driving the oscillating system, the oscillating system including a first oscillator, a first torsion spring, a second oscillator, a second torsion spring and a supporting member, the first oscillator including a first movable element having a light deflecting element configured to deflect light, the second oscillator including a second movable element having a mass adjusting member configured to adjust a mass, wherein the first movable element is resiliently supported by the second movable element through the first torsion spring, for torsional oscillation about an oscillation axis, wherein the second movable element is resiliently supported by the supporting member through the second torsional spring, for torsional oscillation about the oscillation axis, and wherein the oscillating system has at least two natural oscillation modes having different frequencies, about the oscillation axis. | 10-30-2008 |
20090235502 | OSCILLATOR DEVICE, OPTICAL DEFLECTOR AND OPTICAL INSTRUMENT USING THE SAME - An oscillator device and a method of producing the same, that enables adjustment of an inertia moment or a gravity center position of an oscillating member through wide range and at high speed, wherein the oscillating member oscillates about an oscillation axis | 09-24-2009 |
Patent application number | Description | Published |
20080297869 | OSCILLATOR DEVICE AND DRIVE CONTROL METHOD FOR OSCILLATION SYSTEM OF OSCILLATOR DEVICE - An oscillator device includes an oscillation system having at least one oscillator configured to oscillate, the oscillation system having a plurality of natural oscillation modes with a plurality of frequencies which frequencies are mutually in a relationship of integral-number ratio, a driving system configured to drive the at least one oscillation system, and a drive control system configured to control the driving system, wherein the drive control system applies to the driving system a driving signal in the form of a rectangular pulse based on combining a plurality of rectangular pulse signals corresponding to the plurality of natural oscillation modes, respectively. | 12-04-2008 |
20090051992 | OSCILLATOR DEVICE, OPTICAL DEFLECTING DEVICE AND METHOD OF CONTROLLING THE SAME - Disclosed is an oscillator device that includes an oscillating system having a first oscillator, a second oscillator, a first torsion spring for connecting the first and second oscillators each other, and a second torsion spring being connected to the second oscillator and having a common torsional axis with the first torsion spring; a supporting system for supporting the oscillating system; a driving system for driving the oscillating system so that at least one of the first and second oscillators produces oscillation as can be expressed by an equation that contains a sum of a plurality of time functions; a signal producing system for producing an output signal corresponding to displacement of at least one of the first and second oscillators; and a drive control system for controlling the driving system on the basis of the output signal of the signal producing system so that at least one of amplitude and phase of the time function takes a predetermined value. | 02-26-2009 |
20090101037 | GAP MEASURING METHOD, IMPRINT METHOD, AND IMPRINT APPARATUS - A gap measuring method for measuring a gap between two members by irradiating the two members with light is constituted by preparing a first member and a second member which are disposed opposite to each other; irradiating the first member and the second member with light from one member side to obtain spectral data about intensity of reflected light or transmitted light from the other member side; and determining a gap between the first member and the second member by comparing the obtained spectral data with a database in which a gap length and an intensity spectrum are correlated with each other. | 04-23-2009 |