| Patent Number |
Title Of Patent |
Date Issued |
| 5189681 |
High powered laser with reduced optical aberration |
February 23, 1993 |
| A high power convective flow gas laser having reduced aberration is characterized by negative branch unstable resonator configuration. The present laser is configured to invert an intracavity beam about a focal point within the optical cavity, thereby avoiding a region of high temper |
| 5185753 |
Circular and elliptical polarization of a high power laser by adjoint feedback |
February 9, 1993 |
| An unstable resonator system is controlled in polarization by the use of a compound resonator in which the parent resonator is coupled to a polarization control leg by an aperture that passes a small portion of the output beam into a polarization control element and returns a polarized |
| 5179564 |
Linear polarization control of high power lasers |
January 12, 1993 |
| An unstable laser resonator is controlled in polarization by the use of a control leg coupled to the parent resonator and having a linear polarization control element therein, so that control of a low power beam in said control leg serves to control the polarization of the parent res |
| 5157684 |
Optically pulsed laser |
October 20, 1992 |
| An unstable resonator, dc excited, is pulsed using an adjoint coupled beam of low power as the pulsing element. The resonator feedback consists of the self-feedback and the adjoint beam feedback. The self-feedback can be sufficient for self-oscillation and pulsed operation can be achieve |
| 4780607 |
Laser beam power monitoring arrangement |
October 25, 1988 |
| A monitoring arrangement monitors the power of a light beam which travels in a predetermined path between a laser and a destination location and is reflected at a predetermined location of the path from a reflecting surface of a deflecting mirror, with attendant inherent light scattering |
| 4429211 |
Laser pipe welding system for nonstationary pipe |
January 31, 1984 |
| A laser pipe welding system for welding 360.degree. around a pipe includes a pair of focusing heads each welding half the pipe circumference, a seam tracker to keep the focal spot on the seam to compensate for axial and radial variations, an active beam alignment system for real-time |
| 4403828 |
Damage resistant coated laser mirror |
September 13, 1983 |
| A damage resistant laser mirror is disclosed comprising a copper substrate highly polished to an optical finish coated with a thin layer of molybdenum or tungsten. The composite has good reflecting properties, is damage-tough, and conducts heat well away from the reflective coating. The |
| 4370540 |
Reflective beam rotator |
January 25, 1983 |
| An apparatus adapted for rotating a beam of radiation to obtain azimuthal and radial time averaging of the intensity distribution incident onto a workpiece is disclosed. The apparatus includes a housing adapted for rotation about a centerline axis, an entrance port and an exit port a |
