Laser coagulation system
Granted: April 12, 1988
Patent Number:
4736744
A laser coagulation system projects a slit image beam into an eyeball to determine a treatment point and selectively delivers argon and krypton laser beams thereto during an opthalmological operation. Observation equipment receives the slit image beam and laser beams reflected from the treatment point to observe the treatment point. A pair of discs are coaxially rotatably mounted around a shaft parallel to the optical axis between the treatment point and the observation equipment. The…
Conduction cooled ion laser
Granted: April 5, 1988
Patent Number:
4736379
The subject invention relates to a conduction cooled ion laser capable of producing higher output power. The device includes an insulated tube and a plurality of heat conducting members mounted in thermal contact with the wall of the tube. Primary and secondary ring gas barriers or shields project axially from the heat conducting members with the primary shield being located radially inward with respect to the secondary shield. The shields are mounted such that they axially overlap to…
Conduction cooled laser bore structures formed from graphite and other materials
Granted: March 29, 1988
Patent Number:
4734915
The subject invention is related to a new and improved bore assembly for use with a gaseous ion laser. Each bore assembly is mountable to a heat conducting member located within the tube. The heat conducting member is provided with a central opening and is connected at the periphery thereof to the inner surface of the tube. The bore assembly of the subject invention includes a discharge confining element having a central channel and formed from a sputter-resistant material such as…
Beam selector for a photocoagulator
Granted: March 22, 1988
Patent Number:
4732460
The subject invention relates to an apparatus for selectively intercepting and redirecting a beam from a laser. The apparatus is particularly suited for use in a photocoagulator having an argon laser and a dye laser which are rigidly mounted to a housing. A set of fixed optical elements are provided for directing the beam of the argon laser to the cavity of the dye laser to pump the dye laser. The subject apparatus selectively intercepts and redirects the argon laser beam from its…
Attenuating beam splitter
Granted: December 8, 1987
Patent Number:
4711526
An apparatus is disclosed for attenuating the beam of a laser. The apparatus is particularly suited for situations where a low powered aiming beam is necessary to be coaxially aligned with a full power working beam. The apparatus includes a refractive element having a pair of spaced-apart, parallel faces. A mounting arrangement is provided for selectively moving the refractive element into and out of the path of the full power laser beam. The refractive element is mounted such that when…
Distributive lasing system
Granted: November 17, 1987
Patent Number:
4707837
An improved gas laser is disclosed. The laser has a support tube to support and to maintain the alignment of the optical resonator structure. The gas lasing medium is used within the support tube to maintain the tube at a substantially constant temperature above the ambient. Furthermore, an active temperature controller is disclosed. The temperature controller maintains the gas lasing medium in the support tube at a substantially constant temperature. An active pressure controller is…
Miniature cryogenic pump method and apparatus for ion lasers
Granted: June 16, 1987
Patent Number:
4674092
A method and apparatus for reducing gas pressure in a laser wherein a miniature cryogenic pump is constructed to comprise an integral part of a laser plasma tube. The pump includes a container which holds molecular sieve material, a conduit which permits communication between the container and the plasma tube, and a valve which controls the communication along the conduit. All connections between the container, conduit, valve and plasma tube are gas-tight so as to maintain the ion…
Apparatus for perforating sheet material
Granted: June 9, 1987
Patent Number:
4672168
Apparatus is disclosed for forming plural rows of holes in a web of sheet material being advanced longitudinally along a unidirectional path of travel, the apparatus including a continuous wave laser and beam delivery apparatus. Beam delivering means delivers substantially the entire energy of the laser beam for predetermined periods of time to discrete web portions spaced apart across the web and includes means periodically interposed into and removed from the path of the laser beam for…
Laser
Granted: April 28, 1987
Patent Number:
4661958
An improved gas laser is disclosed. The laser has a support tube to support and to maintain the alignment of the optical resonator structure. The gas lasing medium is used within the support tube to maintain the tube at a substantially constant temperature above the ambient. Furthermore, an active temperature controller is disclosed. The temperature controller maintains the gas lasing medium in the support tube at a substantially constant temperature. An active pressure controller is…
Power supply for gas discharge lasers
Granted: March 3, 1987
Patent Number:
4648093
A high voltage power supply for energizing a gas discharge laser in either an enhanced pulse mode or a continuous mode, which power supply is simple to manufacture and minimizes the voltage that other parts of the energizing circuit are required to withstand. The voltage provided by a high voltage DC power supply is boosted by the interaction of first and second reactive components. A first reactance is provided which stores charges at the boosted potential. This charge is provided to…
Active pressure regulator for a gas laser
Granted: October 15, 1985
Patent Number:
4547885
An improved gas laser is disclosed. The laser has a support tube to support and to maintain the alignment of the optical resonator structure. The gas lasing medium is used within the support tube to maintain the tube at a substantially constant temperature above the ambient. Furthermore, an active temperature controller is disclosed. The temperature controller maintains the gas lasing medium in the support tube at a substantially constant temperature. An active pressure controller is…
Dye laser with rotating wedge alignment servo
Granted: April 30, 1985
Patent Number:
4514849
A laser-pumped laser system is disclosed, such as a dye laser which is optically pumped by an argon ion laser. An improved servo system is provided for maintaining relative alignment of the pump laser beam with respect to the dye laser cavity. This is accomplished by rotating the pump beam such that the beam defines a conical surface, by means such as an optically-transmissive rotating wedge. Such rotation provides dithering along two orthogonal axes, which provides the necessary control…
System for recording a time code signal on motion picture film
Granted: March 12, 1985
Patent Number:
4504130
An apparatus and related method for recording a continuous digital time code on motion picture film as it is advanced intermittently by a motion picture camera. The apparatus controllably adjusts the time durations of the successive bits of the signal it records, to compensate for the variable velocity profile of the intermittently advancing film. As a result, the apparatus records the time code signal as a continuous signal with a uniform time base, even though the film is being moved…
Power supply for a laser
Granted: February 26, 1985
Patent Number:
4502145
An improved gas laser is disclosed. The laser has a support tube to support and to maintain the alignment of the optical resonator structure. The gas lasing medium is used within the support tube to maintain the tube at a substantially constant temperature above the ambient. Furthermore, an active temperature controller is disclosed. The temperature controller maintains the gas lasing medium in the support tube at a substantially constant temperature. An active pressure controller is…
High power fundamental mode laser
Granted: February 19, 1985
Patent Number:
4500996
A high power, fundamental (TEMoo) mode gaseous laser is described having a discharge-confining bore tube which is provided with spaced-apart annular, inwardly-extending, radial projections or rings, which have inside diameters which match the fundamental mode diameter along the tube.
Method and apparatus for recording a digital signal on motion picture film
Granted: January 1, 1985
Patent Number:
4491399
A method and apparatus for recording a digital signal such as a modified SMPTE time code on motion picture film as it is being intermittently advanced by a motion picture camera. The recorded time code includes a set of timing bits followed immediately by a set of synchronization bits. In one embodiment, the time code is recorded as a continuous signal with the last bit recorded for each frame having an extended length, to ensure that uncertainties in the specific times at which the…
Precision machining apparatus and method utilizing a laser
Granted: January 24, 1984
Patent Number:
4427872
A method and apparatus for precision machining cylindrical workpieces is disclosed wherein a laser beam is directed at the workpiece tangent to or offset from a tangent to the workpiece. The workpiece is rotated about its longitudinal axis and, at the same time, the workpiece is scanned longitudinally of its axis by a laser beam.
Laser system and its method of use
Granted: August 2, 1983
Patent Number:
4396285
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…
Broad band phase shift system
Granted: April 12, 1983
Patent Number:
4379622
A broad band phase shifting system, having a fixed angle of phase retardation, has at least one broad band reflecting means in the system. The broad band reflecting means also has an angle of phase retardation, with the angle of phase retardation of the reflecting means less than the fixed angle of phase retardation of the system.
Gas laser
Granted: March 29, 1983
Patent Number:
4378600
A gaseous laser includes a gas discharge tube made of a comparatively thin-walled ceramic tube. Heat from the discharge is transmitted to the exterior tube by conduction through thin-walled, cup-shaped members which are bonded to the interior wall of the ceramic tube. The discharge cross-section is determined by apertures in sputter-resistant discs which are coaxially affixed to or formed on the cup members. Also coaxially affixed to the cup-members are cylindrical shields which control…
