| 摘要 |
<p>Apparatus is provided for effecting medical or dental surgery, and to a related method. The subject body on which surgery is to be performed has a reference thereon or therein identified, such as a layer in the cornea, or a surface of a tooth. A handpiece (12) has a longitudinally extending first optical path and a second, transverse optical path, with a dichroic reflector (56) at the juncture of the paths. The handpiece contains a variable focus lens (58) and a fiberoptic bundle (20) is connected axially to the distal end of the handpiece. Light is passed through the fiberoptic bundle into the handpiece to illuminate the site. The image of the site is passed through the variable focus lens and to the fiberoptic bundle, and thence to a control apparatus (24) for adjusting the variable focus lens so as to provide for focussing of the treatment laser beam at a predetermined distance from the reference. A laser beam is passed to the handpiece by way of the second optical path, and thence through the variable focus lens, which focuses the beam to a localized spot which is at a predetermined distance from the reference: the distance may be zero, where, for instance, the reference is the surface of a tooth which is to be ablated. The handpiece is supported by an articulating arm system which provides six degrees of freedom of motion. A method of performing surgery comprising determining by focus condition measuring equipment the distance of a reference in a subject body, adjusting a variable focus lens by control signals proportional to the focus condition measured, and passing a laser beam through the variable focus lens in the adjusted position.</p> |
