Nidek Co., Ltd.

Nippondenso Co., Ltd.

Toyotomi Kogyo Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Nitto-denko Corporation

Kenji Nakamura

Kazunari Shimizu

Kazuharu Nakamura

Yutaka Nakanishi

Yoshio Mito

Toshihiko Yamada

Mitsuhiro Gono

Kiyonobu Itoh

Masaaki Hanebuchi

Naoki Isogai

Tetsuyuki Miwa

Yusuke Sakashita

Toru Arikawa

Shirohisa Kobayashi

Tsutomu Uemura

Naoko Hayashi

Miwaji Ikeya

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.

Non-contact ultrasonic ophthalmotonometer

An ophthalmic apparatus to examine an examinee's eye includes: a first optometry unit to perform a first examination of the examinee's eye; a second optometry unit to perform a second examination of the examinee's eye; a drive unit to cause relative movement of the first and second optometry units in three-dimensional manner relative to the examinee's eye; a controller to control the drive unit; a selection receiving unit to receive a selection signal representing at least one selected from the first second examinations; and a face photographing unit to photograph a face image including at least one of examinee's right and left eyes. The controller switches, according to the selection signal, between a first path for alignment of the first optometry unit with the eye detected from the face image and a second path for alignment of the second optometry unit with the eye detected from the face image.

Ophthalmic apparatus

A corneal endothelial cell photographing apparatus for photographing endothelial cells of a patient eye's cornea, includes: a cornea photographing optical system including an imaging device and configured to project light toward the cornea and photograph the corneal endothelial cells through the imaging device; a light projecting optical system to project detection light in a first oblique direction to the cornea to detect a focus state of the cornea photographing optical system relative to the cornea; a detecting optical system including a detector with arranged pixels and configured to receive, in a second oblique direction opposite to the first oblique direction, corneal reflection light resulting from the detection light and including reflection light from the corneal endothelium through the detector, and detect an intensity distribution of the corneal reflection light in a depth direction; and a controller to cause a monitor to display the intensity distribution output from the detector.

Corneal endothelial cell photographing apparatus

An optometric apparatus includes an optotype presenting optical system for presenting part of a plurality of optotypes corresponding to visual acuity to be measured to an examinee's eye and a visible light source for irradiating illumination light to the optotypes presented to the eye through the optotype presenting optical system. A controller is configured to execute processing of changing a light amount of the illumination light to be irradiated to the optotypes from the visible light source between a predetermined first light amount and a second light amount lower than the first light amount and processing of switching the optotypes to be presented to the eye at the time of changing the light amount of the illumination light from the first light amount to the second light amount.

Optometric apparatus

An eye measurement apparatus includes: a subjective measurement optical system configured to subjectively measure an examinee's eye, the subjective measurement optical system including: a chart to be presented to the examinee's eye; and a glare light source for irradiating the examinee's eye with a glare light; and a control part configured to determine presence or absence of opacity in a light transmitting part of the examinee's eye and, when the presence of opacity is determined, to allow display of necessity for a glare test which is a subjective measurement to be performed in a state that the examinee's eye is irradiated with the glare light.

Eye measurement apparatus

An eye refractive power measurement apparatus includes a measurement optical system, a calculator and an output unit. The measurement optical system projects measurement light onto a fundus of an examinee's eye, extracts the measurement light reflected on the fundus as ring-shaped light, and causes an imaging device to capture a ring-shaped image. The calculator measures eye refractive power of the examinee's eye, based on the ring-shaped image captured by the imaging device, specifies a position of the ring-shaped image to calculate a measured line of the image, performs approximate processing on the measured line to calculate an approximate curve, and calculates a displacement between the measured line and the approximate curve in a meridian direction for each divided region. The output unit outputs a measurement result of the eye refractive power and a calculation result of the displacement in each divided region.

Eye refractive power measurement apparatus

An eye refractive power measurement apparatus for objectively measuring eye refractive power of a patient's eye, includes: a light-projecting optical system that includes a light source and projects measurement light onto a fundus of the patient's eye; a light-receiving optical system that includes an imager device serving as a two-dimensional light-receiving element and receives the measurement light reflected from the fundus; and an operating section that determines the eye refractive power of the eye based on a two-dimensional pattern image by the measurement light imaged by the imager device. The light source is a super-luminescent diode or a laser diode that emits light having a center wavelength in a range of approximately 850 nm to 940 nm.

An eye refractive power measurement apparatus capable of performing analysis of an examinee's eye for irregular astigmatism with accuracy comprises a measurement optical system comprising an optical system projecting measurement light onto an examinee's fundus and an optical system photo-receiving the measurement light as a ring or substantially-ring fundus reflection image, a light deflection member placed in the optical systems, a unit rotating the deflection member, a memory storing the photo-received image as a measurement image, an analysis unit performing analysis of the measurement image, and an output unit, wherein the analysis unit detects the number of images or a width of an image in each meridian direction in the measurement image and judges the eye has irregular astigmatism when a portion in which the number of the images is two or a portion in which the width of the image goes beyond a predetermined level is detected.

A fire-extinguishing device for an open-type oil burner is disclosed which is capable of effectively preventing the discharge of bad odor to a room due to unburned fuel oil gas at the fire-extinguishing of the oil burner. The fire-extinguishing device includes a damper for closing, at the fire-extinguishing, an opening of a combustion cylinder construction of the oil burner through which combustion gas is discharge to a room. The damper or combustion cylinder construction may be provided with an oxidation catalyst plate through which combustion gas is discharged to a room at the fire-extinguishing, so that unburned fuel oil gas may be removed by means of the catalyst plate.

Growing community of inventors

Aichi, Japan

Kenji Nakamura