In order to render possible the ablation to different depths in a process for correcting the shape of a lens in which the surface of the lens is acted upon by the radiation of a pulsed radiation source through a shutter in specific regions exposed by the shutter and thereby removing material from the lens by the radiation effect during the impingement of each radiation pulse, wherein the radiation is concentrated in a bundle of rays, the cross section of which is smaller when striking the lens surface than that of the lens surface exposed by the shutter, and wherein the bundle of rays is moved such that the entire lens surface exposed by the shutter is irradiated by radiation pulses consecutively impinging on the lens surface, it is suggested that the bundle of rays is moved between successive radiation pulses only to such an extent that the regions of the lens surface struck by the radiation pulses consecutively impinging on the lens surface partially overlap. A device is also suggested for performing this process.
A device for figuring objects by means of material erosion of the surface thereof, comprising a pulsed laser beam and a deflection device through which the laser beam is directed at the object surface and via which the object surface is guided. The invention is suitable for figuring natural optical lenses made from a biological substance or artificial optical lenses. The inventive device is provided with an optical device to modify the distribution of the radiation intensity inside the laser beam cross section. The radiation intensity, once the laser beam has passed through the optical device, has a bell-shaped or Gaussian-like distribution in at least one cross sectional direction through the laser beam.
A device for shaping objects by removal of material from the surface thereof with a pulsed laser beam and a deflecting device through which the laser beam is guided over the surface of the object. An optical device is provided for changing the distribution of the radiation intensity inside the laser beam cross section. After the passage of the laser beam through this optical device, the radiation intensity has a bell-shaped or Gaussian distribution, or a distribution similar to a bell-shaped or Gaussian distribution, in at least one cross-sectional direction through the laser beam.
