A laser system for medical applications has at least two lasers and a movable concave reflector. The lasers are capable of generating beams of coherent electromagnetic radiation. One of the beams, an aiming beam, is aligned to impinge the reflector, to reflect therefrom and to impinge a biological specimen. The reflector is moved until the beam is aligned to impinge the desired position. The reflector is held stationary and the second beam is generated. The second beam is also aligned to impinge the reflector to reflect therefrom and to impinge the same desired position as that impinged by the first beam.
A laser thermal testing method and system for use in testing a fire alarm system which has a plurality of heat-sensors which are remotely distributed throughout a protected area. The laser thermal testing system includes a first laser and a second laser. The first laser generates an aiming beam of coherent electromagnetic radiation in the visible spectrum. The laser thermal testing system also includes a movable reflector which reflects the aiming beam. The movable reflector is optically coupled to the first laser. The movable reflector is first moved in order to align the aiming beam in an aligned position so that the aiming beam is reflected onto one of the heat-sensors. The movable reflector is then fixedly secured in the aligned position. The second laser generates a heating beam of coherent electromagnetic radiation in the infrared spectrum. The second laser is optically coupled to the reflector so that when the movable reflector is fixedly secured in the aligned position the second laser may be turned on in order for the heating beam to be reflected onto the heat-sensor thereby triggering the fire alarm system during a testing sequence.
An arrangement for the guidance or conductance of a beam during the treatment of a workpiece with a laser, especially during a surface treatment by the laser beam, through the intermediary of mirrors which are interposed in the path of the beam intermediate a laser source and the workpiece. At least one deflecting mirror of the mirrors is equipped with adjusting elements for implementing a locally variable topography of its mirror surface, and is actuated from a control apparatus for effectuating a deformation or distortion of the cross-sectional geometry of the beam in conformance with the measure of a specified geometry of the beam focal point on the surface of the workpiece.
A laser beam condensing device which can be manufactured at low cost by using reflecting mirrors which can be machined at low cost. The device is capable of condensing a laser beam to a high energy density while eliminating any optical path difference, even if the optical axis of the incident beam strays. This device includes a first and a second reflecting mirror. An incident laser beam is deflected by these mirrors in the same direction. One of the two mirrors is a toroidal mirror, while the other is a spherical, cylindrical or toroidal reflecting mirror. The mirror surfaces of the two reflecting mirrors are machined so that the second reflecting mirror can cancel out any wave front aberrations of the laser beam reflected by the first reflecting mirror.
The invention relates to a laser-processing unit, in particular a laser-welding unit, having a laser beam source (2) for generating a laser beam (LS) and having a pivotable focusing unit (8) for pivoting the laser beam (LS) about two axes of rotation (x, y) and for focusing the laser beam (LS) in a focus (F). A dichroic mirror (4) is arranged in the beam path of the laser beam (LS) between the laser beam source (2) and the focusing unit (8), which mirror is assigned an observation device (20) in such a manner that the optical axis (22) of this device coincides with the axis (24) of the laser beam (LS) as it propagates downstream of the dichroic mirror, as seen in the direction of propagation of the laser beam (LS).
An adaptor attachable to a laser apparatus and to a microscope for directing a laser beam from the laser apparatus onto an object in a working plane as viewed via the microscope. The adaptor includes an optical system located in the path of the laser beam for focusing the laser beam onto an object in the working plane. The optical system includes a number of mirrors. The adaptor also includes a manipulatable mirror located between the optical system and the working plane. The manipulatable mirror is selectively manipulatable to direct the laser beam to any desired location in the working plane. Further the adaptor includes a focusser coupled to the optical system that is capable of selectively focusing and defocussing the laser beam.
