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11. 发明专利

JPH05237062A 失效
公开(公告)号：JPH05237062A
公开(公告)日：1993-09-17
申请号：JP7889192
申请日：1992-02-28
申请人： CANON KK
发明人： YAZAWA KOJI , KOBAYASHI KAZUNOBU
IPC分类号： A61B3/14 , A61B3/10
摘要： PURPOSE:To achieve a checking of the presence of turbidity of an intraocular transmission object along with various measurements of eyes to be inspected. CONSTITUTION:An aperture mask 2, a bored mirror, a projection lens 4, a mirror 5, a dichroic mirror 6, an objective lens 7 and a dichroic mirror 8 are arranged sequentially on an optical path 01 to an eye E to be inspected from an infrared ray source 1 for measuring refraction. An aperture mask 12, an imaging lens 13, a multiprism 14 and a dichroic mirror 10 are provided in the direction of reflection of the bored mirror. Light is received with a TV camera 11 and displayed on a TV monitor 16 via a signal processor 15 or outputted from a printer 17. An infrared ray source 18 for anterior ocular lighting is provided on the front bottom of the objection lens 7 and a projection lens 19 is arranged in the direction of reflection of the dichroic mirror 8. A refraction value measured and an image taken of turbidity of a lens obtained by transmission through the eye to be inspected are displayed on the TV monitor 15 which lights the anterior ocular segment and the intraocular part of the eye E to be inspected.

12. 发明专利

JPH04317629A EYE GROUND CAMERA 失效
公开(公告)号：JPH04317629A
公开(公告)日：1992-11-09
申请号：JP11093491
申请日：1991-04-16
申请人： CANON KK
发明人： KOBAYASHI KAZUNOBU
IPC分类号： A61B3/14
摘要： PURPOSE:To facilitate the sticking of plural pieces of eye ground photographs by providing a projecting part turned to the inside, in the right upper corner of an aperture mask for determining an image pickup range, and sticking the photograph, based on this projecting part as a reference. CONSTITUTION:At the time of photographing a photograph, when a movable mirror is retreated from an optical path and a photographing light source is allowed to emit light, an illumination to an eye ground and a reflection from the eye ground are executed, and an eye ground image passes through an aperture mask 13 and is photographed onto a film 14. Its outline is determined by a shape of the aperture mask 13, and the left and the right sides and the upper and the lower sides become a circular arc and a straight line, respectively. Its right upper corner part has a short cut-like projecting part 13' to the inside of a screen by a straight line, and is stuck so that the projecting part 13' is positioned in the right upper part of each eye ground photograph.

13. 发明专利

JPH0473043A OPHTHALMOLOGICAL APPARATUS 失效
公开(公告)号：JPH0473043A
公开(公告)日：1992-03-09
申请号：JP18626790
申请日：1990-07-13
申请人： CANON KK
发明人： KOBAYASHI KAZUNOBU
IPC分类号： A61B3/10 , A61B3/12
摘要： PURPOSE:To facilitate alignment by inspecting an eye to be inspected in condition as presented to the eye to be inspected adjusting an alignment mark and an appearance part image of the eye to be inspected by an focusing means to always enable clear presentation of the alignment without depending on reflectivity. CONSTITUTION:A front eye part image M and target light source images 12A-12D are combined electrically within a circular centering mark Mc and a mixer 14 to be outputted electrically from a pattern generator 15 to be outputted onto a TV monitor 16 and the resulting image is presented to an eye E to b inspected along an optical axis 02. the person P to be inspected has the center of a pupil Ec of an eye E to be inspected aligning the centering mark Mc and the target light source images 12A-12D are made to project all clearly onto a TV camera 11 thereby facilitating alignment.

14. 发明专利

JPH03272731A OPHTHALMIC INSTRUMENT 失效
公开(公告)号：JPH03272731A
公开(公告)日：1991-12-04
申请号：JP7398190
申请日：1990-03-23
申请人： CANON KK
发明人： KOBAYASHI KAZUNOBU
IPC分类号： A61B3/10 , A61B3/107
摘要： PURPOSE:To provide an ophthalmic instrument high in detection accuracy which can detect even minute strain in a cornea reflected image in a circular pattern by providing a means for moving sections which are not luminescent, in order by means of luminescent element within a light source in a circular shape. CONSTITUTION:Twenty four luminescent diodes composed of 3 groups are disposed in a circular shape in order of a1 through h1, a2 through h2 and a3 through h3 at a light source 5 in a circular shape, a cornea reflected image is formed on the image forming screen of a television camera 2 by means of an imaging lens 1, and it is displayed as a Meyer's image M on the display section 4 of a television monitor 4 together with the image in front of an eye so that the whole of display is observed through the eye (e) of a tester. In this case, when one line out of lines L1 through L8 is switched into an 'OFF' condition in order by a controller 7 with the rest of the lines left to an 'ON' condition, 3 image sections which are not luminescent, are run in order n such a way that 3 luminescent diodes b1, b2 and b3 are turned off after 3 luminescent diodes a1, a2 and a3 have been turned off, and 3 luminescent diodes c1, c2 and c3 are subsequently turned off. By this constitution, a dynamic pattern is provided wherein the Mayer image looks like as if 3 cutout sections M1, M2 and M3 were rotated. By this constitution, even minute strain in the cornea can be detected with ease.

15. 发明专利

JPH0249634A COMPOSITE MODEL EYE 失效
公开(公告)号：JPH0249634A
公开(公告)日：1990-02-20
申请号：JP20118188
申请日：1988-08-12
申请人： CANON KK
发明人： KOBAYASHI KAZUNOBU , NAKAMURA YUKITSUGU
IPC分类号： A61B3/10 , A61B3/107
摘要： PURPOSE:To measure the axial length of an eye and the shape of the cornea by one apparatus by integrally incorporating a spherical reflecting body whose optical reflecting surface is turned to the direction vertical to the direction connecting the ultrasonic wave incident surface of one end of a rod-shaped ultrasonic wave transmitting body and the ultrasonic wave reflecting surface of the other end thereof. CONSTITUTION:An ultrasonic wave incident surface 2 almost vertical to an axial line X-X is provided to the central part of the leading end of the large diameter part 1a of an ultrasonic wave transmitting body 1 for measuring the axial length of an eye and an ultrasonic wave reflecting surface 4 for reflecting the ultrasonic wave incident surface 2 is provided to the leading end part of the small diameter part 1b thereof so as to be almost vertical to the axial line X-X. A spherical reflecting body 6 having a spherical optical reflecting surface 6a for measuring the shape of the cornea is further provided to the large diameter part 1a between the ultrasonic wave incident surface 2 and the ultrasonic wave reflecting surface 4 so as to be turned to the direction vertical to the axial line X-X. When a model eye is rotated around a mount shaft 10, the ultrasonic wave incident surface 2 or the optical reflecting surface 6a can be rapidly opposed to an ophthalmic measuring device.

16. 发明专利

JPH0249633A COMPOSITE MODEL EYE 失效
公开(公告)号：JPH0249633A
公开(公告)日：1990-02-20
申请号：JP20118088
申请日：1988-08-12
申请人： CANON KK
发明人： KOBAYASHI KAZUNOBU , NAKAMURA YUKITSUGU
IPC分类号： A61B3/10 , A61B3/107
摘要： PURPOSE:To measure the axial length of an eye and the shape of the cornea by the same apparatus by mounting a spherical reflecting body to the end part provided with an ultrasonic reflecting surface of a rod-shaped ultrasonic transmitting body through a gap part and providing a spherical reflecting sur face to the surface thereof. CONSTITUTION:The contact surface 2 of an ultrasonic probe almost vertical to an axial line X-X is provided to one end part of an ultrasonic transmitting body 1 and an ultrasonic wave reflecting surface 4 for reflecting the ultrasonic wave sent out from the contact surface 2 of the ultrasonic probe is provided to the other end part thereof so as to be almost vertical to the axial line X-X. A holder 6 is engaged with the end part of said transmitting body 1 through a gap part 5 for blocking the transmission of an ultrasonic wave and a spherical reflecting body 7 for measuring the cornea is mounted on the holder 6. When a composite model eye is rotated by 180 deg. around a mount shaft 13, the surface of either one of the contact surface 2 of the ultrasonic probe and a spherical reflecting surface 8 can be rapidly opposed to an ophthalmic machine. Therefore, both of the axial length of an eye and the shape of the cornea can be measured by one time mounting.

17. 发明专利

JPH0231728A OPHTHALMIC MEASURING APPARATUS 失效
公开(公告)号：JPH0231728A
公开(公告)日：1990-02-01
申请号：JP18333288
申请日：1988-07-22
申请人： CANON KK
发明人： MAEDA YASUO , NAKAMURA YUKITSUGU , SAKANE TOSHIO , YANO KOICHI , KOBAYASHI KAZUNOBU , MASUDA TAKASHI , MATSUMURA ISAO , KOBAYAKAWA YOSHI
IPC分类号： A61B3/10 , A61B3/103 , A61B3/107
摘要： PURPOSE:To always display the image of an external eye part on a monitor without changing over the same to a target reflected image by storing the image of the external eye part projected immediately before the measuring operation of the target reflected image and displaying the same on the monitor at the time of measurement. CONSTITUTION:Shutter mirrors 7, 13 are set to a state closing a light path at the time of the alignment of an eye E to be examined and the image of an external eye part is formed on the light detection surface of a two-dimensional imaging element 14 through an objective lens 8, the shutter mirror 7, a total reflection mirror 16, a relay lens 17 and the shutter mirror 13. The image signal thereof is inputted to an MPU 20 and the image of the external eye part is displayed on the basis of the control by the MPU 20 and the recording of the image signal is renewed at a predetermined time interval and the newest image signal is always inputted to the second frame memory 22. At the same time when a measuring switch is pushed, the MPU 20 changes over the input image to a monitor 19 for observing an external eye to the image of the external eye part immediately before measuring operation. Therefore, measurement can be performed without interrupting the observation of the image of the external eye part.

18. 发明专利

JPH0223934A EYE REFRACTIVITY MEASURING APPARATUS 失效
公开(公告)号：JPH0223934A
公开(公告)日：1990-01-26
申请号：JP17357588
申请日：1988-07-12
申请人： CANON KK
发明人： NAKAMURA YUKITSUGU , SAKANE TOSHIO , YANO KOICHI , MAEDA YASUO , KOBAYASHI KAZUNOBU , MASUDA TAKASHI , MATSUMURA ISAO , KOBAYAKAWA YOSHI
IPC分类号： A61B3/10 , A61B3/103
摘要： PURPOSE:To enhance measuring accuracy by forming an index projection image reduced in blur to the eyeground by arranging a measuring index at a predetermined or arbitrary position to measure refractivity and moving the measuring index in an optical axis direction corresponding to the measured result to measure refractivity. CONSTITUTION:The output of a two-dimensional sensor array 10 is connected to an operational processing circuit 11, and a measuring index 1 and a light source 2 are moved in the direction of an optical axis L1 by the output of said processing circuit 11 through a drive apparatus 12 composed of a motor. After the measuring index 1 is arranged at a predetermined position with respect to an eye E to be examined, the measuring index 1 is set at the initial state position, for example, at the measuring position in such a case that the eye E to be examined is emmetropia to perform preparatory measurement. The rough refractivity of the eye E to be examined is measured by this preparatory measurement and this measured value is processed by an operational processing circuit 11 to sent a drive signal to a drive apparatus 12 which in turn controls the measuring position of the measuring index 1 so as to sharply form the image of the measuring index 1 to the eyeground Er of the eye E to be examined. That is, by performing final measurement after moving the measuring index 1 to a desired position, accurate eye refractivity can be measured.

19. 发明专利

JPH01250229A OPHTHALMIC ULTRASONIC MEASURING APPARATUS 失效
公开(公告)号：JPH01250229A
公开(公告)日：1989-10-05
申请号：JP7926088
申请日：1988-03-31
申请人： CANON KK
发明人： NAKAMURA YUKITSUGU , MASUDA TAKASHI , HAMANO YOSHIMASA , KOBAYASHI KAZUNOBU , MARUYAMA SHIGEO , MATSUMURA ISAO
IPC分类号： A61B8/00 , A61B3/10 , A61B3/16 , A61B8/10
摘要： PURPOSE:To accurately perform measurement by correcting the oppression error of an eyeball at the time of the measurement of the axial length of an eye, by providing a means for detecting the contact start position of a probe with the cornea, a means for calculating the displacement quantity from the contact start position at the time of measurement and a means for correcting said means. CONSTITUTION:When the alignment at a proper position is completed, a measurement switch 5 for measuring the axial length of an eye is pressed to bring a probe 19 to an active state by an ultrasonic wave transmitting and receiving part 31 while a slide rotary shaft 15 is rotated by a motor 24 through a motor control part 34 and slid to the left by a motor 22 to allow the probe 19 to advance toward an eye E to be examined. The probe approaches the eye to be examined to bring a reflecting signal to the state S2 of a contact start position from a state S1. A waveform judging unit 32 detects the appearance of the state S2 to stop the rotation of the motor 22. Herein, from the necessity for correcting the effect of mechanical delay, an operational processing 11 calculates the position of the slide rotary shaft at the contact start position in the slide direction, the position thereof in the slide direction after perfect stop and the axial length of the eye at this time from the output of a potentiometer and also calculates the axial length of the eye at the time of non-oppression to display the same.

20. 发明专利

JPH01212535A EYE WIDTH DETECTOR 失效
公开(公告)号：JPH01212535A
公开(公告)日：1989-08-25
申请号：JP3699888
申请日：1988-02-19
申请人： CANON KK
发明人： KOBAYASHI KAZUNOBU
IPC分类号： A61B3/11 , A61B3/10
摘要： PURPOSE:To enable accurate detection of lateral movement of machine body by contacting a movable lever fixed to the base with the step section of the machine body extending longitudinally, and detecting movement of the lever. CONSTITUTION:A microswitch 23 is fixed to a base 11 and a cam face 12c for switching the microswitch 23 is formed on the underface approximately in the lateral center of a movable table 12. The central section of a lever 25 is secured to the shaft of a potentiometer 24 fixed to the base 11, and step sections, i.e., protrusions 12a, 12b, of the movable table 12 extending longitudinally are arranged at the opposite sides. When refraction of an eye is measured, lateral movement is detected through the microswitch 23 and taken into the potentiometer 24, then it is processed through an operation processing means 18 and the eye width is displayed or printed.

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