| Patent Number |
Title Of Patent |
Date Issued |
| 5867519 |
Multiple element, folded beam laser |
February 2, 1999 |
| A multi-element, folded beam laser includes a plurality of laser medium elements, pumping means, a highly reflective reflector, an output coupler and one or more beam directors for redirecting the beam through the elements and between the reflector and the output coupler. An alternate |
| 5867518 |
Multiple element laser pumping chamber |
February 2, 1999 |
| A multi-element, uniformly pumped laser includes a plurality of laser medium elements, a pumping means, a highly reflective reflector and an output coupler. The pumping means includes at least one pumping element which simultaneously excites at least two of the laser medium elements. An |
| 5854805 |
Laser machining of a workpiece |
December 29, 1998 |
| A laser machining (including marking) method that employs a diode laser pumped solid state laser is controlled by a computer that contains a program for the interaction of the laser beam with a workpiece. The pumping of the laser is synchronised with the action of the beam in a serie |
| 5812569 |
Stabilization of the output energy of a pulsed solid state laser |
September 22, 1998 |
| The energy of a series of output pulses of a solid state laser pumped by a diode array and triggered by a Q-switch is stabilized and rendered independent of the repetition rate by interrupting the pumping to allow the energy stored in the laser active element to fall at the commencement |
| 5696783 |
Laser cooling |
December 9, 1997 |
| The cooling of the outer surface of the rod or other solid active element of a solid state laser is improved by causing coolant to travel in a plurality of, preferably streamline, helical flows extending around this surface in contact with it. The respective longitudinal components of a |
| 5585019 |
Laser machining of a workpiece through adjacent mask by optical elements creating parallel beams |
December 17, 1996 |
| A laser machining system employs a perforated proximity mask placed on or near a generally planar workpiece surface. Holes in the mask define a pattern of holes in the workpiece or marks on its surface to be formed by laser beam pulses passing through the mask. The beam is indexed from h |
| 5463200 |
Marking of a workpiece by light energy |
October 31, 1995 |
| The known technique of marking (including machining) a workpiece by light energy, e.g. a pulsed laser beam, in order to create a pattern of marks on the workpiece is improved by converting a primary beam into a plurality of individual beamlets that are arranged in an array corresponding |
| 5420719 |
Laser beam frequency doubling system |
May 30, 1995 |
| For separation of second and higher order second harmonics from a composite laser beam, a substrate is provided with a binary level relief structure that, in the preferred construction, consists of a regular series of parallel substantially rectangular grooves on one or both of its major |
| 5400351 |
Control of a pumping diode laser |
March 21, 1995 |
| To maintain substantially constant the temperature of a diode junction of a pulsed, cooled, diode laser and hence the wavelength of the optical output of the laser, which laser is used for optically pumping a main, pulsed, solid state laser, the diode junction is heated by an external so |
| 5319663 |
Dust precipitation in a gas laser |
June 7, 1994 |
| Dust in a gas laser, particularly an excimer laser, is removed from the gas charge by one or more electrostatic precipitators that are located inside the laser vessel in the path of gas circulation that is produced by a fan and passes through the discharge area defined by the main discha |
| 5237583 |
Excimer laser assembly and an optic mount therefor |
August 17, 1993 |
| The problems of maintaining proper alignment of the mirrors of an excimer laser in the face of thermal and pressure distortions of the ends of the laser vessel and when replacing the mirrors after removal for cleaning are overcome by mounting the mirrors on a separate, fixed supporting f |
| 5103454 |
Light beam attenuation |
April 7, 1992 |
| Variable attenuation of a light beam is achieved by mounting a rotatable multilayer dielectric attenuator in the beam. A first portion of the beam is transmitted through the attenuator and a second portion is reflected. Rotation of the attenuator about an axis transverse to the beam vari |
| 5081638 |
Excimer laser |
January 14, 1992 |
| An excimer laser has a pair of main electrodes defining a lasing space, and a series of pairs of pre-ionization pins arranged alongside the main electrodes. These pins form preionization gaps for generating discharges that provide ultraviolet radiation to condition the gas in the lasing |
| 5073896 |
Purification of laser gases |
December 17, 1991 |
| Purification of the gas mixture used in an excimer laser is carried out by cooling such mixture in a cryogenic trap to a temperature that is low enough that the lasting gas or gases (e.g. krypton, xenon, fluorine, hydrogen chloride) and the impurities are all substantially fully cond |
| 5005177 |
Laser optics quality monitoring |
April 2, 1991 |
| This invention describes a method and apparatus that can be used in optic quality monitoring of a gas laser. The method involves measuring the temperature of at least one of the optics in a gas laser, then subtracting the temperature of the laser enclosure from the optic temperature to |
| 4823354 |
Excimer lasers |
April 18, 1989 |
| In an excimer laser system with wavelength bandwidth narrowing, a feedback loop for monitoring and correcting the tuning of the laser employs a wavelength calibration device in the form of a gas with an absorption peak at the desired narrow wavelength. A portion of the laser output recei |
| 4707711 |
Character imaging system |
November 17, 1987 |
| In a character imaging system, a selected one of a plurality of different characters (letters, numerals, symbols etc.) arrayed as windows in an otherwise opaque mask, is projected optically onto a selected location on a working surface. In this manner, laser light can be used to burn an |
| 4417342 |
Laser |
November 22, 1983 |
| A gas laser includes a pair of subsidiary electrodes to form a sharpening gap. These subsidiary electrodes are located within the envelope of the laser so as to be exposed to the same gas or mixture of gases that flow between the main electrodes and support the main lasing action. The |
