摘要:
A cavity in which exciting lamps and a laser rod are disposed is provided in the substantially central position of the section of a cylindrical casing. A heat exchanger comprises a multiplicity of cooling fins which surround the periphery of the cavity are integrally formed of an outer wall so that air paths are formed through and between the cooling fins in an axial direction of the cylindrical casing and coolant is circulated through a space between the cavity and the outer wall. A cooling fan is disposed in the rear of said cylindrical casing for blowing air toward the heat exchanger.
摘要:
A prism light guide luminaire has opaque and light emitting surface portions which together form a selected cross-sectional configuration. The opaque surface portion has a light reflecting characteristic. The light emitting surface portion is prism light guide material which confines, within the luminaire, light rays which strike the material at angles falling within the material's acceptance angular range. Within the luminaire, a light scattering area having a predefined shape and location redirects light into angles falling outside the material's acceptance angular range. The luminaire's cross-sectional configuration, the opaque surface portion's light reflecting characteristic, and the shape and location of the light scattering area are selected such that (i) light redirected by the light scattering area which does not pass directly from the scattering area to the light emitting surface portion and escape through that portion is substantially efficiently reflected by the prismatic material directly back onto the scattering area; and, (ii) all paths along which light may pass directly from the scattering area to the light emitting surface portion define a solid angle less than 2.pi..
摘要:
A laser beam processing apparatus includes a body providing a generally cylindrical bounding structure for a cavity. A window allows admission of an incident light beam into the cavity and emission of a laser beam from the cavity. A plurality of reflectors are arranged to sequentially reflect the light beam and/or light generated thereby along a light path which is generally polygonal as viewed from an end of the cavity. Laser material is disposed in the light path whereby the light generated by the light beam includes light which is derived by stimulated emission from the laser material.
摘要:
A laser system which is compact, requires no cooling means and can produce either substantially continuous output or narrow single pulses of high intensity or pulse bursts comprises a closed spherical pumping cavity having a diffuse reflecting surface and a laser rod and a flashlamp mounted in non-parallel relationship in the cavity. The system is especially useful in ophthalmology.
摘要:
A solid state laser medium for use in a solid state laser oscillator uses a hollow cylindrical solid state laser medium which is formed cylindrically in order to improve the cooling efficiency of the laser. The laser includes a pumping device for exciting the laser medium and an optical resonator that is arranged on both ends in the axial direction of the laser medium. The pumping device includes a plurality of flash lamps that are arranged on the outside, with respect to the central longitudinal access of the laser medium, of the outer surface of the hollow cylindrical laser medium and an outer reflector that is arranged so as to enclose the flash lamps and the laser medium, from the outside, with respect to the central longitudinal access of the laser medium, of the flash lamps, and a cylindrical inner reflector with outer diameter which is slightly smaller than the inner diameter of the laser medium, the inner reflector being inserted in the cavity of the laser medium. Cooling apparatus for cooling the hollow cylindrical solid state laser medium from both the outer longitudinal surface and the inner longitudinal surface of the hollow cylinder are also provided.
摘要:
Apparatus configured to minimize wavefront distortion of a coherent light beam is disclosed. The lasing medium of the laser apparatus has a hexagonal cross section and an internal surface with a circular cross section coaxial with a longitudinal axis of the lasing medium. The internal surface defines an interior space for receiving an optical pumping source. The external faces of the lasing medium are surrounded with a circumferential reflector and fluid coolant is flowed over the internal surface and external faces. The coherent light beam is passed through the lasing medium to follow a helical course totally internally reflecting off of the external faces.
摘要:
A Multi-Flash Lamp laser system incorporates a solid state fluorescent converter. The multiple Flash Lamps are symmetrically positioned on opposite sides of the major dimension of the lasing material but avoid coupling of light between the lamps. The optical efficiency of the laser systems is enhanced by means of a fluorescent converter positioned between the lamps and the laser to reduce reflector losses and convert light outside of the laser pumping band to the pumping band wave lengths.
摘要:
An optically pumped single mode laser, e.g., Nd:YAG crystal (20) with planoconcave mirrors is increased in efficiency by an order of magnitude to about 8% by optics (25, 27) for focusing the high power multimode output of laser diode arrays (21, 22) into the mode volume (20') of the laser medium (20). A plurality of these optically pumped single mode lasers (1-4) may be cascaded in a ring with dichroic mirrors (M.sub.1 -M.sub.4) at the corners for coupling in the laser diode arrays, each having its own means for spatially tailoring its beam to concentrate pump distribution inside the lasing mode volume of the medium. An InGaAlAs pump diode (30) with its wavelength the same as the lasing medium makes the ring unidirectional.
摘要:
An optically pumped solid-state laser system includes a rod (50) of laser material and a plurality of flashlamps (66) for pumping the laser. A surface for reflecting radiation from the flashlamp (66) to the rod (50) follows a set of curves (96). Each curve (96) is the locus of points whose distances outside the rod (50) and the lamp (66) to a pair of starting points on the other side of a base line (74) are a constant value such that the locus includes a lamp cusp (70).
摘要:
An improved laser rod cooling system in which a laser rod (18) is cooled by conducting the heat generated thereby to a flexible, cushioning gel (21) which surrounds and contacts the rod along its length and secures the rod within a fully enclosing support (22). The support is thermally conductive and transparent to the pumping energy from a flashlamp (12). The gel material absorbs differential thermal expansion between the rod and its support to avoid any stresses otherwise exerted on the rod, while the complete surrounding of the rod by the support minimizes thermal gradients within the rod. Thus, a light beam with minimal optical distortion is generated by the laser rod.