Patents by Inventor Naoki Isogai
Naoki Isogai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7650064Abstract: An ophthalmic apparatus which is easy to operate. The ophthalmic apparatus includes a measurement unit which measures characteristics of an examinee's eye, an image-pickup optical system for picking up an image of an anterior segment of the eye, a monitor having a screen where the picked-up anterior-segment image is displayed, a plurality of operation switches arranged on the screen or in the vicinity of the screen, a display control part which controls to display function information items indicating functions of the operation switches on the screen, and a changer which makes a selective changeover between a first operation mode in which a state where the function information items are not displayed on the screen is set as a standard state, and a second operation mode in which a state where the function information items are displayed on the screen is set as a standard state.Type: GrantFiled: October 6, 2006Date of Patent: January 19, 2010Assignee: Nidek Co., Ltd.Inventors: Naoki Isogai, Naoto Honda
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Publication number: 20090195750Abstract: An ophthalmic apparatus capable of alignment in total automation and manual alignment with an examinee's eye comprising an ophthalmic examination unit, a unit detecting an alignment state of the examination unit with the eye, a main base, a mobile base on which the examination unit is mounted and moved horizontally on the main base through operation of a control member, driving mechanisms moving the examination unit vertically and horizontally with respect to the mobile base, means switching a mode between a manual mode of performing alignment of the examination unit with each eye in sequence through the operation and a fully automatic mode of performing the alignment through driving of the driving mechanisms, and a control unit controlling the driving based on the detection result which starts in the fully automatic mode the driving based on a predetermined trigger signal so as to perform the alignment.Type: ApplicationFiled: January 30, 2009Publication date: August 6, 2009Applicant: NIDEK CO., LTD.Inventors: Naoki Isogai, Kazuhiro Yoshimura
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Publication number: 20090185136Abstract: 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.Type: ApplicationFiled: January 6, 2006Publication date: July 23, 2009Applicant: NIDEK CO., LTD.Inventors: Naoki Isogai, Masaaki Hanebuchi, Mitsuhiro Gono, Kenji Nakamura
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Publication number: 20090128778Abstract: To provide an ophthalmic apparatus capable of performing efficient measurement of a plurality of eye characteristics of an examinee's eye, which comprises a first measurement unit comprising a first measurement system for performing measurement of a first characteristic of the eye, a second measurement unit comprising a second measurement system for performing measurement of a second characteristic of the eye, a measurement unit in which the measurement units are placed such that heights of first and second measurement axes of the respective systems are different from each other, a movement mechanism unit moving the measurement unit in a vertical direction, and a control unit controlling the mechanism unit such that the height of the first measurement axis at the time of first measurement by the first measurement unit becomes almost the same as that of the second measurement axis at the time of second measurement by the second measurement unit.Type: ApplicationFiled: April 2, 2007Publication date: May 21, 2009Applicant: NIDEK CO., LTD.Inventors: Naoto Honda, Shigekazu Takada, Kozuhiro Yoshimura, Naoki Isogai, Akihiro Hayashi
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Patent number: 7452078Abstract: An eye refractive power measurement apparatus by which an examiner can properly check reliability of a measurement result while time and effort of the examiner are saved. The eye refractive power measurement apparatus for measuring eye refractive power of an examinee's eye has a measurement optical system for projecting a measurement target onto a fundus of the eye to pick up a fundus reflection image by a two-dimensional image-pickup element, a storing device which stores the picked-up fundus reflection image as a measurement image, a display device, a measurement condition judging device which makes a judgment as to whether or not the stored measurement image satisfies a predetermined measurement condition, and a first display control device which controls the display device to display the stored measurement image when the measurement condition judging device judges that the measurement condition is not satisfied.Type: GrantFiled: September 27, 2006Date of Patent: November 18, 2008Assignee: Nidek Co., Ltd.Inventor: Naoki Isogai
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Patent number: 7354152Abstract: An ophthalmic apparatus capable of checking the presence of abnormality such as soil on optical members and checking before examination whether or not the apparatus is in a state of being affected by disturbance light. The apparatus has a photo-receiving optical system, being arranged inside the apparatus and having optical members, for photo-receiving examination light reflected from the eye which is at an examination position outside the apparatus, a projection optical system, being arranged inside the apparatus and having a light source, for projecting detection light onto the optical member arranged nearest to the outside of the apparatus, a photodetector for photo-receiving reflected detection light when the light source is lit in a state where the eye is not placed at the examination position, and an abnormality detection device for detecting abnormality of the optical members based on an output signal from the photodetector.Type: GrantFiled: October 6, 2003Date of Patent: April 8, 2008Assignee: Nidek Co., Ltd.Inventors: Naoki Isogai, Noriji Kawai, Yutaka Omori
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Patent number: 7344247Abstract: An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, includes: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye; an analysis part which acquires variation or fluctuation in the refractive power of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on a result of measurement by the measuring optical system, and determines tho accommodative function of the eye based on the acquired variation or fluctuation; a display part which displays a result determined by the analysis part; and a control part which controls presenting of the fixation target to perform at least one of simple examination for determining the accommodative function with respect to a first presentType: GrantFiled: July 29, 2004Date of Patent: March 18, 2008Assignee: Nidek Co., Ltd.Inventors: Naoki Isogai, Noriji Kawai, Miwako Hanaki, Akihiro Hayashi, Mikio Kurachi, Toshiya Kobayashi
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Patent number: 7341346Abstract: An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, comprises: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye and includes a light projecting optical system which includes a light source and projects examination light to a fundus of the eye and a light receiving optical system which includes a light receiving element and receives the examination light reflected from the fundus; an analysis part which acquires variation or fluctuation in the refractive power in a specified measurement meridian direction of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on output of the light receiving element, and determines the accommodative function of the eye based onType: GrantFiled: December 17, 2004Date of Patent: March 11, 2008Assignee: Nidek Co., Ltd.Inventors: Miwako Hanaki, Noriji Kawai, Naoki Isogai
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Patent number: 7316480Abstract: An eye refractive power measurement apparatus which is capable of measuring even an eye with a small pupil diameter and measuring a normal eye with a large enough pupil diameter with accuracy and stability. The apparatus includes a measurement optical system for photo-receiving measurement light from a fundus via a ring-shaped aperture arranged at an approximately conjugate position with a pupil by using a photodetector, a changing device for changing a size of the ring-shaped aperture on a pupillary surface to a size different in both inside diameter and outside diameter, and a calculation device for calculating the eye refractive power based on a photo-receiving result obtained by the photodetector.Type: GrantFiled: September 27, 2004Date of Patent: January 8, 2008Assignee: Nidek Co., Ltd.Inventors: Masaaki Hanebuchi, Mitsuhiro Gono, Mikio Kurachi, Naoki Isogai
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Patent number: 7296892Abstract: An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, comprises: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye and includes a light projecting optical system which includes a light source and projects examination light to a fundus of the eye and a light receiving optical system which includes a light receiving element and receives the examination light reflected from the fundus; an analysis part which acquires variation in the refractive power of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on output of the light receiving element, and determines the accommodative function including a range of accommodation and HFC (a frequency of occurrence of a high fType: GrantFiled: December 20, 2004Date of Patent: November 20, 2007Assignee: Nidek Co., Ltd.Inventors: Miwako Hanaki, Naoki Isogai, Akihiro Hayashi
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Publication number: 20070081128Abstract: An ophthalmic apparatus which is easy to operate. The ophthalmic apparatus includes a measurement unit which measures characteristics of an examinee's eye, an image-pickup optical system for picking up an image of an anterior segment of the eye, a monitor having a screen where the picked-up anterior-segment image is displayed, a plurality of operation switches arranged on the screen or in the vicinity of the screen, a display control part which controls to display function information items indicating functions of the operation switches on the screen, and a changer which makes a selective changeover between a first operation mode in which a state where the function information items are not displayed on the screen is set as a standard state, and a second operation mode in which a state where the function information items are displayed on the screen is set as a standard state.Type: ApplicationFiled: October 6, 2006Publication date: April 12, 2007Applicant: NIDEK CO., LTD.Inventors: Naoki Isogai, Naoto Honda
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Publication number: 20070070293Abstract: An eye refractive power measurement apparatus by which an examiner can properly check reliability of a measurement result while time and effort of the examiner are saved. The eye refractive power measurement apparatus for measuring eye refractive power of an examinee's eye has a measurement optical system for projecting a measurement target onto a fundus of the eye to pick up a fundus reflection image by a two-dimensional image-pickup element, a storing device which stores the picked-up fundus reflection image as a measurement image, a display device, a measurement condition judging device which makes a judgment as to whether or not the stored measurement image satisfies a predetermined measurement condition, and a first display control device which controls the display device to display the stored measurement image when the measurement condition judging device judges that the measurement condition is not satisfied.Type: ApplicationFiled: September 27, 2006Publication date: March 29, 2007Applicant: NIDEK CO., LTD.Inventor: Naoki Isogai
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Patent number: 7128417Abstract: A refractive power measurement apparatus capable of measuring a refractive power of an optical system to be measured with a simple constitution at low cost. The refractive power measurement apparatus includes a projection optical system which projects measurement light onto an optical system to be measured, a photo-receiving optical system provided with a photodetector which photo-receives the measurement light from the optical system to be measured and a lens system which guides the measurement light onto the photodetector, a moving device for moving the lens system within a plane intersecting at right angles with an optical axis of the photo-receiving optical system so as to form a predetermined measurement pattern image on a photo-receiving surface of the photodetector, and a calculation device for calculating a refractive power of the optical system to be measured based on the measurement pattern image.Type: GrantFiled: June 26, 2003Date of Patent: October 31, 2006Assignee: Nidek Co., Ltd.Inventor: Naoki Isogai
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Publication number: 20050174536Abstract: An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, comprises: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye and includes a light projecting optical system which includes a light source and projects examination light to a fundus of the eye and a light receiving optical system which includes a light receiving element and receives the examination light reflected from the fundus; an analysis part which acquires variation in the refractive power of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on output of the light receiving element, and determines the accommodative function including a range of accommodation and HFC (a frequency of occurrence of a high fType: ApplicationFiled: December 20, 2004Publication date: August 11, 2005Applicant: NIDEK CO., LTD.Inventors: Miwako Hanaki, Naoki Isogai, Akihiro Hayashi
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Publication number: 20050146685Abstract: An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, comprises: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye and includes a light projecting optical system which includes a light source and projects examination light to a fundus of the eye and a light receiving optical system which includes a light receiving element and receives the examination light reflected from the fundus; an analysis part which acquires variation or fluctuation in the refractive power in a specified measurement meridian direction of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on output of the light receiving element, and determines the accommodative function of the eye based onType: ApplicationFiled: December 17, 2004Publication date: July 7, 2005Applicant: NIDEK CO., LTD.Inventors: Miwako Hanaki, Noriji Kawai, Naoki Isogai
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Publication number: 20050068497Abstract: An eye refractive power measurement apparatus which is capable of measuring even an eye with a small pupil diameter and measuring a normal eye with a large enough pupil diameter with accuracy and stability. The apparatus includes a measurement optical system for photo-receiving measurement light from a fundus via a ring-shaped aperture arranged at an approximately conjugate position with a pupil by using a photodetector, a changing device for changing a size of the ring-shaped aperture on a pupillary surface to a size different in both inside diameter and outside diameter, and a calculation device for calculating the eye refractive power based on a photo-receiving result obtained by the photodetector.Type: ApplicationFiled: September 27, 2004Publication date: March 31, 2005Applicant: NIDEK CO., LTD.Inventors: Masaaki Hanebuchi, Mitsuhiro Gono, Mikio Kurachi, Naoki Isogai
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Publication number: 20050041210Abstract: An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, includes: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye; an analysis part which acquires variation or fluctuation in the refractive power of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on a result of measurement by the measuring optical system, and determines tho accommodative function of the eye based on the acquired variation or fluctuation; a display part which displays a result determined by the analysis part; and a control part which controls presenting of the fixation target to perform at least one of simple examination for determining the accommodative function with respect to a first presentType: ApplicationFiled: July 29, 2004Publication date: February 24, 2005Applicant: NIDEK CO., LTD.Inventors: Naoki Isogai, Noriji Kawai, Miwako Hanaki, Akihiro Hayashi, Mikio Kurachi, Toshiya Kobayashi
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Patent number: 6755528Abstract: A shape measurement apparatus capable of saving time and effort of an examiner and improving measurement accuracy. The apparatus for measuring a spherical shape of an object to be examined comprising a measurement unit where a first projection optical system projects first targets for measurement onto a spherical surface to be measured, a first detection optical system detects images of the projected first targets and a calculation unit obtains a shape of the surface based on the detected images, an output unit which outputs the obtained shape, a mode setting unit which sets any one of a first measurement mode for a convex shape and a second measurement mode for a concave shape, and a condition setting unit which sets at least one of a measurement condition and an output condition based on a mode setting result, the conditions being different between the first and second measurement modes.Type: GrantFiled: December 6, 2002Date of Patent: June 29, 2004Assignee: Nidek Co., Ltd.Inventor: Naoki Isogai
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Publication number: 20040066488Abstract: An ophthalmic apparatus capable of checking the presence of abnormality such as soil on optical members and checking before examination whether or not the apparatus is in a state of being affected by disturbance light. The apparatus has a photo-receiving optical system, being arranged inside the apparatus and having optical members, for photo-receiving examination light reflected from the eye which is at an examination position outside the apparatus, a projection optical system, being arranged inside the apparatus and having a light source, for projecting detection light onto the optical member arranged nearest to the outside of the apparatus, a photodetector for photo-receiving reflected detection light when the light source is lit in a state where the eye is not placed at the examination position, and an abnormality detection device for detecting abnormality of the optical members based on an output signal from the photodetector.Type: ApplicationFiled: October 6, 2003Publication date: April 8, 2004Inventors: Naoki Isogai, Noriji Kawai, Yutaka Omori
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Publication number: 20040061832Abstract: A refractive power measurement apparatus capable of measuring a refractive power of an optical system to be measured with a simple constitution at low cost. The refractive power measurement apparatus includes a projection optical system which projects measurement light onto an optical system to be measured, a photo-receiving optical system provided with a photodetector which photo-receives the measurement light from the optical system to be measured and a lens system which guides the measurement light onto the photodetector, a moving device for moving the lens system within a plane intersecting at right angles with an optical axis of the photo-receiving optical system so as to form a predetermined measurement pattern image on a photo-receiving surface of the photodetector, and a calculation device for calculating a refractive power of the optical system to be measured based on the measurement pattern image.Type: ApplicationFiled: June 26, 2003Publication date: April 1, 2004Inventor: Naoki Isogai