Abstract: An ultrasonic tonometer, which measures an intraocular pressure of a subject eye using an ultrasonic wave, has an ultrasonic actuator including an ultrasonic element that generates an ultrasonic wave and a sonotrode that propagates the ultrasonic wave generated from the ultrasonic element, and irradiating the subject eye with the ultrasonic wave. The sonotrode includes an uneven portion in which a thickness of the sonotrode varies in a sound axis direction of the ultrasonic wave.

Abstract: An ultrasonic tonometer for measuring the eye pressure of an examinee's eye by means of an ultrasonic wave includes an ultrasonic actuator having an ultrasonic element and configured to irradiate the examinee's eye with the ultrasonic wave, and current adjustment means configured to adjust a current applied to the ultrasonic element to control the sound pressure or acoustic radiation pressure of the ultrasonic wave. With this configuration, the ultrasonic tonometer solving at least one of typical problems can be provided. For example, the ultrasonic tonometer capable of properly irradiating the examinee's eye with the ultrasonic wave can be provided.

Abstract: A non-contact ultrasonic tonometer for measuring the eye pressure of an examinee's eye by use of ultrasound includes a Langevin transducer. The Langevin transducer applies ultrasound to the examinee's eye to measure the eye pressure of the examinee's eye. Further, A non-contact ultrasonic tonometer for measuring the eye pressure of an examinee's eye by use of ultrasound includes: ultrasonic generating means for generating ultrasound; a support base supporting the ultrasonic generating means; and attaching means for attaching the ultrasonic generating means to the support base.

Abstract: A non-contact ultrasonic tonometer for measuring an intraocular pressure of an examinee's eye in non-contact manner by use of an ultrasonic wave, comprises: an ultrasonic transducer including a transmitter which emits an ultrasonic transmission pulse wave to the eye and a receiver which detects an ultrasonic reflection pulse wave from the eye, the transducer being arranged to be placed in a position apart from the eye and to transmit and receive the pulse wave with respect to the eye through the medium of air; and a calculation part being arranged to obtain a peak amplitude level of the reflection pulse wave based on an output signal from the ultrasonic transducer and measure the intraocular pressure based on the obtained peak amplitude level.

Abstract: A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye, in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the examinee's eye and a sensor for detecting the ultrasonic wave reflected from the examinee's eye; and an observation optical system for observing an anterior segment of the eye, wherein the probe is placed in an optical path of the observation optical system, and the observation optical system forms an image of the anterior segment through a surrounding region of the probe.

Abstract: A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the eye and a sensor for detecting the ultrasonic wave reflected from the eye; a detection unit which detects an alignment state of the probe with respect to the eye; a determination unit which determines whether the alignment state is proper or not based on a detection result of the detection unit; a trigger signal generation unit which generates a trigger signal to start measurement based on a determination result of the determination unit; and a control unit which controls the probe to emit the ultrasonic wave based on generation of the trigger signal.

Abstract: An eye axial length measurement apparatus includes a light source, a non-contact eye axial length measurement unit for optically measuring axial length of a patient's eye in non-contact manner, an XYZ driving unit, and a determination means which determines whether a cloudy portion which is an obstacle to measurement by the non-contact eye axial length measurement unit is present, based on one of a measurement result of the non-contact eye axial length measurement unit and an imaging result of an anterior segment section imaging unit placeable in the non-contact eye axial length measurement unit.

Abstract: A non-contact ultrasonic tonometer comprises: a ultrasonic transducer that transmits an ultrasonic pulse wave to an examinee's eye and receives the ultrasonic pulse wave reflected from the eye in a non-contact manner; a transmission unit that transmits a drive signal to the ultrasonic transducer to cause the ultrasonic transducer to repeat transmission of the ultrasonic pulse wave K times at a constant interval 1/T in order to transmit a burst wave to the eye, where “T” is a burst frequency and “K” is a burst wave number that is the number of cycles of pulse wave; and an arithmetic unit that determines intraocular pressure (IOP) based on an output signal from the ultrasonic transducer when the ultrasonic transducer receives the burst wave reflected from the eye.

Abstract: A non-contact ultrasound measurement device comprises: a first unit including an ultrasound transducer adapted to transmit and receives an ultrasonic wave in a non-contact manner with respect to an object to be examined, the first unit being adapted to process an output signal from the transducer and measure a first characteristic of the object; and a second unit including at least one of an observation unit for observing the object from front in a non-contact manner and a measurement unit for measuring a second characteristic of the object from front in a non-contact manner, wherein the transducer comprises: an aperture being provided in the central part of the transducer and having a sufficient size to be utilized for observation or measurement of the object by the second unit, and a transmitting and receiving part of the ultrasonic wave being provided to surround the aperture.

Abstract: A non-contact ultrasonic tonometer for measuring an intraocular pressure of an examinee's eye in non-contact manner by use of an ultrasonic wave, comprises: an ultrasonic transducer including a transmitter which emits an ultrasonic transmission pulse wave to the eye and a receiver which detects an ultrasonic reflection pulse wave from the eye, the transducer being arranged to be placed in a position apart from the eye and to transmit and receive the pulse wave with respect to the eye through the medium of air; and a calculation part being arranged to obtain a peak amplitude level of the reflection pulse wave based on an output signal from the ultrasonic transducer and measure the intraocular pressure based on the obtained peak amplitude level.

Abstract: A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye in a non-contact manner by use of an ultrasonic wave comprises: a probe that emits an ultrasonic beam to be allowed to enter the eye and detects the ultrasonic beam reflected by the eye; and an arithmetic section that determines the intraocular pressure by processing an output signal from the probe, the probe including a broadband air-coupled transducer that transmits and receives the ultrasonic beam having a broadband frequency component.

Abstract: A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the eye and a sensor for detecting the ultrasonic wave reflected from the eye; a detection unit which detects an alignment state of the probe with respect to the eye; a determination unit which determines whether the alignment state is proper or not based on a detection result of the detection unit; a trigger signal generation unit which generates a trigger signal to start measurement based on a determination result of the determination unit; and a control unit which controls the probe to emit the ultrasonic wave based on generation of the trigger signal.

Abstract: A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye, in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the examinee's eye and a sensor for detecting the ultrasonic wave reflected from the examinee's eye; and an observation optical system for observing an anterior segment of the eye, wherein the probe is placed in an optical path of the observation optical system, and the observation optical system forms an image of the anterior segment through a surrounding region of the probe.

Abstract: To provide an ophthalmic ultrasonic diagnostic apparatus capable of obtaining measurement result with high reliability without lengthy measurement.

Abstract: An eye axial length measurement apparatus comprises: a light source which emits low coherent light; a non-contact eye axial length measurement unit for optically measuring axial length of a patient's eye in non-contact manner in such a way that low coherent light emitted from the light source is split into measuring light and reference light, the measuring light and the reference light are caused to interfere with each other, and the eye axial length is calculated based on a difference in optical path length between the measuring light and the reference light when an interference signal is generated; an ultrasonic eye axial length measurement unit including an ultrasonic probe with a transducer, the unit being placed in a position with a deviation from the non-contact eye axial length measurement unit; an XYZ driving unit including a base, a head support unit attached to the base, and a movable unit which supports the non-contact eye axial length measurement unit and ultrasonic eye axial length measurement un

Abstract: An ophthalmic apparatus with which it is easy to open eyelids of an examinee at the time of intraocular pressure measurement has a measurement unit including an measurement part measuring intraocular pressure by blowing fluid to a cornea of an examinee's eye via a nozzle to deform the cornea and a measurement part having a measurement optical system for measuring eye characteristics of the eye, wherein the intraocular pressure measurement part is placed above the eye characteristic measurement part, a device making a selective changeover between an intraocular pressure measurement mode and an eye characteristic measurement mode, and a first movement mechanism part moving the measurement unit in an up-and-down direction with respect to the eye so that a measurement optical axis of either of the measurement parts to be used for the selected mode is positioned at approximately the same height as the examinee's eye.

Abstract: To provide an ophthalmic ultrasonic diagnostic apparatus capable of obtaining measurement result with high reliability without lengthy measurement.

Abstract: An ophthalmic apparatus comprising: an illuminating optical system which projects light to an examinee' eye; an image pickup unit which color-photographs an interference image caused by interference of light reflected by a tear layer of the eye; and an analyzing part which dissolves the photographed interference image to a plurality of color components, determines an appearance of interference stripes of each color component based on a signal of each color component, and obtains a value indicating a dry eye symptom based on at least one of the number of interference stripes of each color component and changes in signal level of each color component.

Abstract: An ophthalmic apparatus with which it is easy to open eyelids of an examinee at the time of intraocular pressure measurement has a measurement unit including an measurement part measuring intraocular pressure by blowing fluid to a cornea of an examinee's eye via a nozzle to deform the cornea and a measurement part having a measurement optical system for measuring eye characteristics of the eye, wherein the intraocular pressure measurement part is placed above the eye characteristic measurement part, a device making a selective changeover between an intraocular pressure measurement mode and an eye characteristic measurement mode, and a first movement mechanism part moving the measurement unit in an up-and-down direction with respect to the eye so that a measurement optical axis of either of the measurement parts to be used for the selected mode is positioned at approximately the same height as the examinee's eye.

Abstract: A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye, in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the examinee's eye and a sensor for detecting the ultrasonic wave reflected from the examinee's eye; and an observation optical system for observing an anterior segment of the eye, wherein the probe is placed in an optical path of the observation optical system, and the observation optical system forms an image of the anterior segment through a surrounding region of the probe.