Other

Knite, Inc.

Princeton University

Lightsense IP Ltd.

Princeton X-ray Laser

Szymon Suckewer

Artur Peter Suckewer

Frederick H Selmon, Iii

Alexander J Smits

Li Deng

Enoch J Durbin

Peter S Hersh

Nicholas S Siegele

Charles H Skinner

Richard A Register

Anatoli Morozov

Gary Joseph Kunkel

Roy Jonathan Rosser

Lewis D Meixler

Joseph G Hirschberg

David Russell Voorhees

Robert Sathre

Darrell S DiCicco

Frederick H Iii Selmon

An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low 'simmer' current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.

Method and apparatus for operating traveling spark igniter at high pressure

Ultra-short pulsed laser radiation is applied to a patient's eye to create a row of bubbles oriented perpendicular to the axis of vision. The row of bubbles leads to a region of the eye to be ablated. In a second step, a femtosecond laser beam guided through the row of bubbles converts it to a channel perpendicular to the axis of vision. In a third step, a femtosecond laser beam is guided through the channel to ablate a portion of the eye. Using a femtosecond laser with intensity in the range of 10-10W/cmfor the second and third steps facilitates multi-photon ablation that is practically devoid of eye tissue heating. Creating bubbles in the first step increases the speed of channel creation and channel diameter uniformity, thereby increasing the precision of the subsequent multi-photon ablation.

Introducing bubbles to improve cornea reshaping without the creation of a flap

Method for producing ultraintense laser pulses in which Stimulated Raman Back-Scattering (SRBS) amplifies and compresses a seed pulse, as well as an inventive compact plasma device which may implement the method. SRBS may be achieved by counter-propagating the seed pulse and a pump pulse through a few millimeter-long plasma having a plasma frequency equal to the difference between the pump and the seed pulse frequencies. Dichroic mirrors may be arranged to provide two amplifying and compression passes through the plasma, allowing greater seed pulse amplification by mitigating Landau damping within the plasma that would occur in a single pass of a plasma of double the length. Alternate examples provide for 2n number of amplification and compression passes by providing n short plasma columns, where n&#x2265;2, and additional, appropriately arranged dichroic mirrors. The compact size of the device, and the ultraintense, ultrashort pulses it emits, suit the device to dermatological applications.

Compact plasma ultraintense laser

A device for traversing water is disclosed that has a left and a right-foot hull and a pair of propulsion poles with attached propulsion pontoons. The propulsion poles are shaped and sized so that a person standing upright can use them to propel themselves across water. The underside of each hull has kick-forward plates that allow the hull to move unimpeded in one direction but not the other. A rail is connected near the inner edge of one hull, and a the rail follower fixed to the other hull, and slidably connected to the rail allow the hulls to more relative to each other in a direction parallel to their long axis.

Cross-water skis

A system and method of replacing a lens to treat a cataract is disclosed. Cataractous tissue is ablated via a multi-photon process using focused, ultra-short laser pulses. Multi-photon ablation requires an energy intensity between 10to 10W/cm. Using lasers having femto-second duration pulses, this intensity is achieved with 50 micro-Joules of energy, allowing material disruption with very little heating or shock. The multi-photon ablated material is removed through a micro-channel that leads from the multi-photon ablated region to at least the surface of the eye. Once the material is removed a pre-polymer fluid is injected in to fill the void. This polymerizes into a gel once inside the lens. The polymerized, transformed material matches both the transparency to visible light and the Young's modulus of healthy lens.

Cataract removal using ultra-short pulse lasers

A method for removing tattoos using two laser beams and a multi-photon process is disclosed. A 0.1 to 100 nsec pulse secondary laser beam focused to 10W/cmcreates a temporary channel from the skin surface to the tattoo pigment. A 100 fsec pulse main laser beam is then guided through the channel to the pigment and focused to sufficient intensity, i.e., 10W/cmor more, to initiate a multi-photon process that breaks up the pigment, disrupting its light reflecting properties. The channel allows the main laser beam unobstructed passage to the pigments, resulting in efficient use of the main laser. The pigment fragments escape through the temporary channel or diffuse into the blood stream. A suitably configured Ti/Sapphire laser beam is split into two components, with an uncompressed component used as the secondary laser beam, and a compressed component as the main laser beam.

Tattoo removal with two laser beams via multi-photon processes

The invention relates to devices, compositions and methods used to improve vision and/or to treat an eye lens disease or condition. In some embodiments, the invention relates to altering or removing eye lens material for the treatment of presbyopia. In additional embodiments, the invention relates to placing compositions in a lens of an eye to improve elasticity of the lens both therapeutically by improving elasticity and/or improving refractive properties and/or prophylactically by preventing renewed stiffening and/or renewed deterioration of the lens refractive properties. In further embodiments, the invention relates to devices and methods of obtaining and analyzing data for use in altering the lens to optimize its elasticity and/or refractive properties.

Devices, methods and compositions for presbyopia correction using ultrashort pulse laser

A method and device for flapless, intrastromal keratomileusis for the correction of myopia, hyperopia and astigmatism, i.e., for vision correction by corneal reshaping without creating a flap. Ultra-short laser pulses are used to create a temporary micro-channel extending to an end point located within the cornea. A second series of ultra-short laser pulses are then delivered to photo-ablate material in the vicinity of the micro-channel end-point. The photo-ablated material may exit through the micro-channel used to deliver the laser pulses, or via a separate micro-channel. With the micro-channel oriented substantially normal to the optical axis of the cornea, and by continuing to supply the ultra-short laser pulses in the appropriate number while moving the point of ablation along the micro-channel, the photo-ablation of the intrastromal tissue may continue in a controlled fashion and the cornea reshaped in a predetermined manner without creating a flap.

Method and device for cornea reshaping by intrastromal tissue removal

A system and method for providing multi-photon processing treatment to a patient. A localized, multi-photon processing event is initiated within a vicinity of an unwanted pigment in order to remove the pigment. The multi-photon processing event requires a relatively low energy, but very intense, pulse of light. The low amount of energy per pulse allows ablation of the material to be highly localized, with negligible thermal damage to surrounding material. The multi-photon event may be initiated by focusing a suitable electromagnetic pulse, such as a 2 mJ laser pulse having a 100 to 300 femtoseconds pulse duration, into a focal volume small enough that the intensity exceeds 10Watts/cm2. A suitably configured Ti:Sapphire solid state laser may provide such pulses at 1-10 kHz. By repeating the multi-photon processing event along the location of a tattoo, the tattoo may be removed with no damage to the surrounding tissue.

Growing community of inventors

Princeton, NJ, United States of America

Szymon Suckewer