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81. 发明专利

AU1473100A Digital pulse width modulator 未知
公开(公告)号：AU1473100A
公开(公告)日：2000-09-04
申请号：AU1473100
申请日：1999-11-09
申请人： VISX INC
发明人： OLTEAN IOAN T
IPC分类号： H03K7/08 , H03K3/017 , H03K9/00 , H03K9/08 , H03K7/00 , G05B19/29 , G01B5/02
摘要： A digital pulse width modulation circuit and method includes a first pulse width clock signal modulated by a second pulse width clock signal that represents a converted analog voltage input. The first and second pulse width signals are provided to a counter that counts to a predetermined gate count, wherein an output pulse width signal is provided that is in proportion to the analog voltage input.

82. 发明专利

DE69230986D1 未知
公开(公告)号：DE69230986D1
公开(公告)日：2000-06-08
申请号：DE69230986
申请日：1992-08-03
申请人： VISX INC
发明人： SHIMMICK JOHN
IPC分类号： A61F9/00 , A61F9/008 , A61F9/01

83. 发明专利

AU4583499A Surgical laser system microscope with separated ocular and objective lenses 未知
公开(公告)号：AU4583499A
公开(公告)日：2000-01-17
申请号：AU4583499
申请日：1999-06-23
申请人： VISX INC
发明人： GLOCKLER HERRMANN J
IPC分类号： A61B19/00 , A61F9/008 , A61F9/01 , A61N5/06

84. 发明专利

CA2333054A1 PATIENT FIXATION SYSTEM AND METHOD FOR LASER EYE SURGERY 未知
公开(公告)号：CA2333054A1
公开(公告)日：2000-01-06
申请号：CA2333054
申请日：1999-06-23
申请人： VISX INC
发明人： SHIMMICK JOHN K , CLAPHAM TERRANCE N , LEMBERG VLADIMIR , MUNNERLYN CHARLES R
IPC分类号： A61B18/20 , A61F9/007 , A61F9/008 , A61F9/01 , A61B17/36
摘要： The invention enhances the alignment between the eye (E), and a laser beam (14) of a laser eye surgery system (10) using a visual fixation system (38), the fixation system (38) often having an adjustable optical train (58). The optical train (58) of the fixation system (38) allows an eye (E) having a significant refractive error to be accurately focused at a fixation target (60). To accommodate the refractive error, the adjustable optical train (58) will often project an image of the target (60) so that the projected image is in focus in front of or behind the plane of the patient's eye (E). The present invention also encompasses the calculation of the proper projection distance to accommodate the refractive error of the eye (E), the calculation preferably based at least in part on the eye glass prescription for that eye (E).

85. 发明专利

AU4211699A Integrated epithelial removal tool 未知
公开(公告)号：AU4211699A
公开(公告)日：1999-12-13
申请号：AU4211699
申请日：1999-05-27
申请人： VISX INC
发明人： CLAPHAM TERRANCE N
IPC分类号： A61F9/008 , A61F9/007 , A61N5/06
摘要： The invention provides improved devices, systems, and methods for removing the epithelial layer of a patient's cornea, particularly in preparation for laser resculpting of the cornea. The invention makes use of an epithelial removal tool which is integrated into a laser eye surgery system. Structurally supporting the epithelial removal tool relative to the optical train allows precise control over the positioning of the tool relative to the cornea. The force and/or duration of epithelial abrasion can be controlled to avoid removal of excess corneal tissues, and the accurate alignment of the removal tool allows the total area of epithelium removal to be minimized while ensuring that adequate access is provided for resculpting. An orbital or concentric movement of the abrasion surface may provide a more even abrasion.

86. 发明专利

AU1073499A Eye tracking device for laser eye surgery using corneal margin detection 未知
公开(公告)号：AU1073499A
公开(公告)日：1999-05-03
申请号：AU1073499
申请日：1998-10-08
申请人： VISX INC
发明人： OLTEAN IOAN T , SHIMMICK JOHN K , CLAPHAM TERRANCE N
IPC分类号： A61B3/113 , A61F9/007 , A61F9/008 , A61F9/01 , A61B17/36
摘要： Systems and methods derive relative eye position by tracking a boundary such as the limbus. Light can be scamed along the limbus, and measured intensity of reflected light processed to derive the eye's position.

87. 发明专利

DE69409285T2 未知
公开(公告)号：DE69409285T2
公开(公告)日：1998-12-17
申请号：DE69409285
申请日：1994-05-05
申请人： VISX INC
发明人： SHIMMICK JOHN F , TELFAIR WILLIAM B , MUNNERLYN CHARLES R , GLOCKLER HERRMANN J
IPC分类号： A61F9/007 , A61B18/20 , A61F9/01 , A61F9/00
摘要： An ophthalmological surgery system and method for performing ablative photodecomposition of the corneal surface by offset image scanning. The image of a variable aperture, such as a variable width slit and variable diameter iris diaphragm, is scanned in a preselected pattern to perform ablative sculpting of predetermined portions of a corneal surface. The scanning is performed with a movable image offset displacement mechanism capable of effecting radial displacement and angular rotation of the profiled beam exiting from the variable aperture. The profiled beam is rotated by rotating the aperture in conjunction with the offset displacement mechanism. The invention enables wide area treatment with a laser having a narrower beam, and can be used in the treatment of many different conditions, such as hyperopia, hyperopic astigmatism, irregular refractive aberrations, post ablation smoothing and phototherapeutic keratectomy.

88. 发明专利

DE69226799D1 未知
公开(公告)号：DE69226799D1
公开(公告)日：1998-10-08
申请号：DE69226799
申请日：1992-02-28
申请人： VISX INC
发明人： MCMILLEN ALAN R , CLAPHAM TERRANCE N , MUNNERLYN CHARLES R
IPC分类号： A61B18/20 , A61B19/00 , A61F9/00 , A61F9/007 , A61F9/01
摘要： An ophthalmological laser surgery system having a laser, associated elements for delivering an optical beam from the laser to a patient eye location, a control unit for controlling the operation of the system and a system input/output device, is enabled by a patient data card. The data card originally contains both patient background and system control information, which is transferred to the control unit via the input/output device. During system operation, newly generated information, such as laser beam power, is stored in the data card to provide an independent record of the surgical procedure actually performed. After one use, the data card is invalidated to prevent further use.

89. 发明专利

AR000028A1 Aparato para la integración temporal y espacial dehaces de luz laser y método de procesamiento de u n haz laser colimado 未知
公开(公告)号：AR000028A1
公开(公告)日：1997-04-16
申请号：AR33465995
申请日：1995-12-15
申请人： VISX INC
IPC分类号： A61F9/007 , A61F9/01 , G02B27/09 , H01S3/101 , G02B27/12
摘要： Un método y aparato para proporcionar integración temporal espacial secuencial de un haz láser de excímero no simétrico colimado para optimizarlas características temporales y espaciales del haz. El integrador temporal comprende un par delentes cilíndricos espaciados según el eje geométrico delhaz en una distancia sustancialmente igual a la suma de la distancia focal de ambos lentes, y el mecanismo a motor para hacer girar los dos lentescilíndricos espaciados alrededor del eje geométrico del haz. El integrador espacial de haces incluye una pluralidad de prismas distribuidos alrededor deun centro hueco, estando la cara de salida de cada prisma dispuesta en ángulo respecto al eje geométrico del cuerpo del integrador espacial de haces de modoque porciones del haz láser que pasan a través de un prisma dado son refractados hacia el centro cuando salen de la cara de salida. Preferentementese hace girar el integrador espacial de haces alrededor del eje geométrico del haz a una velocidad de giro doble de la velocidad de giro de los lentesclíndricos de modo que el haz girado que emerge del integrador temporal de haces sea estacionario respecto al integrador espacial de haces.Alternativamente el integrador espacial de haces se puede hacer girar a la misma velocidad de giro que los lentes cilíndricos, o se puede mantenerestacionario, es decir, que no gire.

90. 发明专利

CA2165515A1 Method and Apparatus for Temporal and Spatial Beam Integration 未知
公开(公告)号：CA2165515A1
公开(公告)日：1996-07-05
申请号：CA2165515
申请日：1995-12-18
申请人： VISX INC
发明人： GLOCKLER HERRMANN J
IPC分类号： A61F9/007 , A61F9/01 , G02B27/09 , H01S3/101 , H01S3/00
摘要： A method and apparatus for providing sequential temporal and spatial integration of a collimated non-symmetrical excimer laser beam to optimize the temporal and spatial characteristics of the beam. The temporal integrator (12) comprises a pair of cylindrical lenses (13,14) spaced along the beam (10) axis by a distance substantially equal to the sum of the focal length of both lenses (13,14), and a motor mechanism for rotating the two spaced cylindrical lenses about the beam axis. The spatial beam integrator (25) includes a plurality of prisms (27) distributed about a hollow center, the outlet face (28) of each prism (27) being angled with respect to the body axis of the spatial beam integrator (25) so that portions of the laser beam passing through a given prism (27) are refracted towards the center upon emergence from the outlet face (28). The spatial beam integrator (25) is preferably rotated about the beam axis at twice the rotation rate of the cylindrical lenses (13,14) so that the rotated beam emerging from the temporal beam integrator (12) is stationary with respect to the spatial beam integrator (25). Alternatively, the spatial beam integrator (25) may be rotated at the same rate as the cylindrical lenses (13,14), or may be maintained stationary, i.e., not rotated at all.

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