公开(公告)号：US5336216A

公开(公告)日：1994-08-09

申请号：US97867

申请日：1993-07-27

申请人： David A. Dewey

发明人： David A. Dewey

IPC分类号： A61B18/20 ,  A61F9/00 ,  A61F9/008 ,  G02B6/42 ,  G02B27/09 ,  H01L33/00 ,  H01S3/00 ,  A61B1/06 ,  F21V7/04

CPC分类号： G02B27/0927 ,  A61F9/008 ,  A61F9/00821 ,  G02B27/09 ,  G02B27/0994 ,  A61F2009/00863 ,  A61F2009/00872 ,  A61F9/009

摘要： An apparatus for delivering a defocused laser beam to a sharp-edged spot (having variable size) in a target plane. The beam has a low power density in a plane of interest between the delivery apparatus and the target plane. In a preferred embodiment, the target plane is the retina of a patient's eye, and the defocused beam profile is controlled so that the beam has low power density at the eye's cornea. The beam produced by the invention is useful not only for ophthalmic surgery, but also for industrial laser heat treating and cutting applications in which a sharp-edged beam cross-section is needed at a target, particularly where delivery of low beam power densities at non-target structures are desirable. In a preferred embodiment of the inventive apparatus, an input laser beam emerges from an optical fiber, and a first lens (having short focal length) is mounted adjacent the optical fiber's output end to receive and transform the input beam. A second lens (having short focal length) is mounted with variable position between the first lens and the treatment site, for magnifying the image of the fiber core. Preferably, a lens system having long focal length (such as a pair of long focal length lenses) is mounted between the second lens and the target plane for relaying the magnified image of the fiber core to the target plane. By varying the position of the second lens and relay lens system, the characteristics of the beam delivered to the treatment site can be controlled.

摘要翻译： 用于将散焦的激光束传送到目标平面中的尖锐边缘（具有可变尺寸）的装置。 光束在传送装置和目标平面之间的感兴趣平面中具有低功率密度。 在优选实施例中，目标平面是患者眼睛的视网膜，并且控制散焦的光束轮廓，使得光束在眼睛的角膜处具有低的功率密度。 本发明生产的光束不仅可用于眼科手术，还可用于工业激光热处理和切割应用，其中目标需要锋利的光束横截面，特别是在非光束辐射下传输近光束功率密度时 目标结构是可取的。 在本发明的装置的优选实施例中，输入激光束从光纤出射，并且第一透镜（具有短焦距）安装在光纤的输出端附近以接收和变换输入光束。 在第一透镜和处理部位之间安装有可变位置的第二透镜（具有短焦距），用于放大纤芯的图像。 优选地，具有长焦距的透镜系统（例如一对长焦距透镜）安装在第二透镜和目标平面之间，用于将光纤芯的放大图像中继到目标平面。 通过改变第二透镜和中继透镜系统的位置，可以控制输送到处理部位的光束的特性。

公开(公告)号：US4686992A

公开(公告)日：1987-08-18

申请号：US729985

申请日：1985-05-03

申请人： David A. Dewey ,  Paul C. Pynckel

发明人： David A. Dewey ,  Paul C. Pynckel

IPC分类号： A61B18/00 ,  A61B3/135 ,  A61B19/00 ,  A61F9/00 ,  A61F9/008 ,  B25J7/00 ,  G02B7/00 ,  G02B21/32 ,  A61B17/36 ,  G02B7/18

CPC分类号： G02B21/32 ,  A61B3/135 ,  A61B34/70 ,  A61F9/008 ,  A61F9/00821 ,  A61F9/00823 ,  B25J7/00 ,  G02B7/004 ,  A61B2034/742 ,  A61F2009/00844 ,  A61F2009/00863 ,  A61F2009/00897

摘要： A micromanipulator for an instrument for focusing a beam of light on a target, such as a laser in an ophthalmic instrument, includes a control member coupled through a spherical bearing located at a pivot location to a coiled spring connected to a control rod for manipulating the focus of a gimballed beamsplitter in the x and y directions. The components are structured and arranged to lie on an axis in the neutral position so that the movement of the light beam, during focusing, corresponds directly to the direction of movement of the control member by an operator. The coiled spring acts as an automatic centering device to return the focused light beam to a predetermined position in the absence of manipulation.

摘要翻译： 用于将光束聚焦在诸如眼科仪器中的激光器的靶上的仪器的显微操纵器包括通过位于枢转位置的球面轴承联接到连接到控制杆的螺旋弹簧的控制构件，用于操纵 在x和y方向上的一个gimballed分束器的焦点。 部件被构造和布置成位于中立位置的轴线上，使得光束在聚焦期间的移动直接对应于操作者对控制构件的移动方向。 螺旋弹簧用作自动定心装置，以在没有操纵的情况下将聚焦光束返回到预定位置。

公开(公告)号：US4628416A

公开(公告)日：1986-12-09

申请号：US729983

申请日：1985-05-03

申请人： David A. Dewey

发明人： David A. Dewey

IPC分类号： G02B27/09 ,  A61B18/20 ,  A61F9/00 ,  B23K26/06 ,  F21K99/00 ,  F21V5/00 ,  F21V8/00 ,  F21V7/04 ,  A61B17/36

CPC分类号： G02B6/0005 ,  A61B18/20 ,  B23K26/073

摘要： A variable spot size illuminator for projecting a variable size spot of light into an illumination plane comprises a source of light, fiberoptic image transmission means having an entrance surface and an exit surface, means for projecting a cone of said light onto said entrance surface, objective lens means for focusing light emerging from said exit surface into said illumination plane, and means for varying the distance between said entrance surface and the vertex of said cone of light. The variable spot size illuminator is useful for projecting a spot of variable size with constant beam convergence in a laser photocoagulator.

摘要翻译： 用于将可变尺寸光点投射到照明平面中的可变光斑尺寸照明器包括光源，具有入射表面和出射表面的光纤图像传输装置，用于将所述光的锥体投影到所述入口表面上的装置，物镜 用于将从所述出射表面出射的光聚焦到所述照明平面中的透镜装置，以及用于改变所述入射表面和所述光锥顶点之间的距离的装置。 可变光斑尺寸照明器可用于在激光光凝器中投射具有恒定光束会聚的可变大小的光点。