公开(公告)号：AT69717T

公开(公告)日：1991-12-15

申请号：AT87902116

申请日：1987-03-19

Applicant: SUMMIT TECHNOLOGY INC

Inventor： RAVEN ANTONY LOVELL ,  MARSHALL JOHN ,  MULLER DAVID F

IPC: A61F9/00 ,  A61B17/30 ,  A61F9/008 ,  A61F9/009 ,  A61F9/01 ,  B23K26/00 ,  B23K26/06

Abstract: A laser system and masking apparatus for reprofiling surfaces, such as corneal surfaces. The system includes a laser and a mask disposed between the laser and the surface to be reprofiled, the mask providing a pre-defined profile of resistance to laser radiation, such that upon irradiation, part of the radiation is selectively absorbed and part is transmitted to the surface in accordance with the masked profile, to selectively erode the surface. The masking apparatus may consist of a mask to be affixed to the surface or may further include a support structure to support and position the mask above the surface. The resistance profile can be created by varying the thickness or the composition of the mask.

公开(公告)号：DE3679638D1

公开(公告)日：1991-07-11

申请号：DE3679638

申请日：1986-09-08

Applicant: SUMMIT TECHNOLOGY INC

Inventor： MARSHALL JOHN ,  WELFORD WALTER T ,  RAVEN ANTHONY LOVELL ,  NESS KAREN MARGARET MONTGOMERY

IPC: A61B18/20 ,  A61B17/00 ,  A61B17/30 ,  A61F9/00 ,  A61F9/007 ,  A61F9/008 ,  A61F9/01 ,  B23K26/00 ,  B23K26/06 ,  B23K26/073 ,  G02B5/00 ,  A61B17/36

Abstract: Laser apparatus for eroding a surface comprises means to select and control the shape and size of the area irradiated by each pulse of laser energy without varying the energy density of the beam. By varying the size of the irradiated area between pulses, some regions of the surface may be eroded more than others and so the surface may be reprofiled. The method and apparatus are suitable, inter alia, for removing corneal ulcers and reprofiling the cornea to remove refractive errors and also for reprofiling optical elements.In one embodiment the beam from the laser (l48) enters an optical system housed in an articulated arm (l74, l78) and terminating in an eyepiece (l90) having a suction cup (206) for attachment to an eye. The optical system comprises a beam forming arrangement (l54, l32, l34, l36, l38, l40, l42) to correct an asmymetric beam cross­section, a first relay telescope (l56, l44, l46), a beam dimension control means (l58) and a second relay telescope (l60, l44, l46).The beam dimension control means (l58) comprises a stop (l26) having a shaped window or a shaped stop portion and movable axially along a converging or diverging beam portion (l24, l28, l30). An alternative beam dimension control means comprises a stop (92) having a shaped window and positioned between coupled zoom systems (90, 94). Mirrors (96), adjustable slits (52) and refractive systems (34, 36, 56, 62) may also be used.The laser is preferably an ArF Excimer laser. The apparatus may comprise a measurement device to measure the surface profile, and a feedback control means to control the laser operation in accordance with the measured and desired profile.

公开(公告)号：AU4847093A

公开(公告)日：1994-03-29

申请号：AU4847093

申请日：1993-09-03

Applicant: SUMMIT TECHNOLOGY INC

Inventor： LOHMANN CHRIS P ,  MARSHALL JOHN

IPC: A61K38/57 ,  A61K37/547 ,  A61K37/553

公开(公告)号：AT64082T

公开(公告)日：1991-06-15

申请号：AT86306916

申请日：1986-09-08

Applicant: SUMMIT TECHNOLOGY INC

Inventor： MARSHALL JOHN ,  WELFORD WALTER T ,  RAVEN ANTHONY LOVELL ,  NESS KAREN MARGARET MONTGOMERY

IPC: A61F9/00 ,  B23K26/06 ,  A61B17/36

公开(公告)号：AU7160687A

公开(公告)日：1987-10-09

申请号：AU7160687

申请日：1987-03-19

Applicant: SUMMIT TECHNOLOGY INC

Inventor： RAVEN ANTONY LOVELL ,  MARSHALL JOHN ,  MULLER DAVID F

IPC: A61F9/00 ,  A61B17/30 ,  A61F9/008 ,  A61F9/009 ,  A61F9/01 ,  B23K26/00 ,  B23K26/06

Abstract: A laser system and masking apparatus for reprofiling surfaces, such as corneal surfaces. The system includes a laser and a mask disposed between the laser and the surface to be reprofiled, the mask providing a pre-defined profile of resistance to laser radiation, such that upon irradiation, part of the radiation is selectively absorbed and part is transmitted to the surface in accordance with the masked profile, to selectively erode the surface. The masking apparatus may consist of a mask to be affixed to the surface or may further include a support structure to support and position the mask above the surface. The resistance profile can be created by varying the thickness or the composition of the mask.

公开(公告)号：AU606315B2

公开(公告)日：1991-02-07

申请号：AU6241486

申请日：1986-09-05

Applicant: SUMMIT TECHNOLOGY INC

Inventor： MARSHALL JOHN ,  RAVEN ANTHONY LOVELL ,  WELFORD WALTER T ,  NESS KAREN MARGARET MONTGOMERY

IPC: A61B18/20 ,  A61B17/00 ,  A61B17/30 ,  A61F9/00 ,  A61F9/007 ,  A61F9/008 ,  A61F9/01 ,  B23K26/00 ,  B23K26/06 ,  B23K26/073 ,  G02B5/00 ,  A61B17/36 ,  G02B26/08

Abstract: Laser apparatus for eroding a surface comprises means to select and control the shape and size of the area irradiated by each pulse of laser energy without varying the energy density of the beam. By varying the size of the irradiated area between pulses, some regions of the surface may be eroded more than others and so the surface may be reprofiled. The method and apparatus are suitable, inter alia, for removing corneal ulcers and reprofiling the cornea to remove refractive errors and also for reprofiling optical elements.In one embodiment the beam from the laser (l48) enters an optical system housed in an articulated arm (l74, l78) and terminating in an eyepiece (l90) having a suction cup (206) for attachment to an eye. The optical system comprises a beam forming arrangement (l54, l32, l34, l36, l38, l40, l42) to correct an asmymetric beam cross­section, a first relay telescope (l56, l44, l46), a beam dimension control means (l58) and a second relay telescope (l60, l44, l46).The beam dimension control means (l58) comprises a stop (l26) having a shaped window or a shaped stop portion and movable axially along a converging or diverging beam portion (l24, l28, l30). An alternative beam dimension control means comprises a stop (92) having a shaped window and positioned between coupled zoom systems (90, 94). Mirrors (96), adjustable slits (52) and refractive systems (34, 36, 56, 62) may also be used.The laser is preferably an ArF Excimer laser. The apparatus may comprise a measurement device to measure the surface profile, and a feedback control means to control the laser operation in accordance with the measured and desired profile.

公开(公告)号：DE3774815D1

公开(公告)日：1992-01-09

申请号：DE3774815

申请日：1987-03-19

Applicant: SUMMIT TECHNOLOGY INC

Inventor： RAVEN LOVELL ,  MARSHALL JOHN ,  MULLER F

IPC: A61F9/00 ,  A61B17/30 ,  A61F9/008 ,  A61F9/009 ,  A61F9/01 ,  B23K26/00 ,  B23K26/06

Abstract: A laser system and masking apparatus for reprofiling surfaces, such as corneal surfaces. The system includes a laser and a mask disposed between the laser and the surface to be reprofiled, the mask providing a pre-defined profile of resistance to laser radiation, such that upon irradiation, part of the radiation is selectively absorbed and part is transmitted to the surface in accordance with the masked profile, to selectively erode the surface. The masking apparatus may consist of a mask to be affixed to the surface or may further include a support structure to support and position the mask above the surface. The resistance profile can be created by varying the thickness or the composition of the mask.