摘要:
The invention includes: a new composition of matter (a composite comprising a naturally occurring in vivo cornea in an in situ eye together with at least one volume of vitrified non-naturally occurring corneal stromal tissue formed within the naturally occurring corneal stromal tissue) wherein the vitrified tissue is modified in structure and properties from its naturally occurring condition into a non-naturally occurring glass-like condition with modifications including but not limited to increased elastic modulus; methods for producing and using the new composition of matter for modifying corneal structure and properties, including but not limited to corneal optical aberrations; wound closure adhesion and transplant adhesion; and a photo vitrification system for producing the new composition of matter comprising at least one photon source with controllable treatment parameters. A reverse template can be added to corneal vitrification systems to increase vitrification and modifications of structure and properties.
摘要:
A tunable solid-state laser system whose bandwidth and wavelength are controlled by the injection of light from a semiconductor diode laser. This laser system is capable of providing output light pulses over substantially all wavelength ranges in the electromagnetic spectrum. When suitably configured, it creates wavelength tunable (or fixed wavelength) pulses having spectral bandwidths that are Fourier transform limited and wavelength stabilized. The coupling means between the semiconductor diode laser and the ring laser cavity incorporates a means for optically isolating the diode laser source from optical feedback from the ring laser, ensuring diode laser source stability.
摘要:
Electronic excitation of polyatomic molecules followed by nonradiative decay provides states from which efficient multiphoton infrared excitation can be achieved. Initial (electronic) excitation can be molecule-specific or isotope-selective. Subsequent multiphoton excitation has a threshold which can be an order of magnitude or more lower than for multiphoton excitation from the ground state. By this method, laser-induced chemical reactions or isotope separation can be achieved with lower infrared laser fluence and/or higher concentration of polyatomic molecules than with prior art methods.
摘要:
Devices and methods for novel retinal irradiance distribution modification (IDM) to improve, stabilize or restore vision are described herein. Also encompassed herein are devices and methods to reduce vision loss from diseases, injuries and disorders that involve damaged and/or dysfunctional and/or sensorily deprived retinal cells. Conditions that may be treated using devices and methods described herein include macular degeneration, diabetic retinopathy and glaucoma. Therapy provided by retinal IDM devices and methods described herein may also be used in combination with other therapies including, but not limited to, pharmacological, retinal laser, gene and stem cell therapies.
摘要:
The invention includes: a new composition of matter (a composite comprising a naturally occurring in vivo cornea in an in situ eye together with at least one volume of vitrified non-naturally occurring corneal stromal tissue formed within the naturally occurring corneal stromal tissue) wherein the vitrified tissue is modified in structure and properties from its naturally occurring condition into a non-naturally occurring glass-like condition with modifications including but not limited to increased elastic modulus; methods for producing and using the new composition of matter for modifying corneal structure and properties, including but not limited to corneal optical aberrations; wound closure adhesion and transplant adhesion; and a photo vitrification system for producing the new composition of matter comprising at least one photon source with controllable treatment parameters. A reverse template can be added to corneal vitrification systems to increase vitrification and modifications of structure and properties.
摘要:
The invention includes: a new composition of matter (a composite comprising a naturally occurring in vivo cornea in an in situ eye together with at least one volume of vitrified non-naturally occurring corneal stromal tissue formed within the naturally occurring corneal stromal tissue) wherein the vitrified tissue is modified in structure and properties from its naturally occurring condition into a non-naturally occurring glass-like condition with modifications including but not limited to increased elastic modulus; methods for producing and using the new composition of matter for modifying corneal structure and properties, including but not limited to corneal optical aberrations; wound closure adhesion and transplant adhesion; and a photovitrification system for producing the new composition of matter comprising at least one photon source with controllable treatment parameters. A reverse template can be added to corneal vitrification systems to increase vitrification and modifications of structure and properties.
摘要:
A method of laser lithotripsy is disclosed that utilizes pulse stretched Q-switched solid state lasers in conjunction with relatively small diameter optical fibers to achieve effective breakup of calculi located within the body, such as kidney and gall stones.
摘要:
A single crystal of rare-earth-doped lanthanum beryllate, whose crystal orientation is suitably chosen, provides a laser medium whose index of refraction is substantially independent of temperature. A laser using such a crystal as the laser medium displays little or no thermal lensing, thus permitting high power operation without wavefront distortion.
摘要:
The invention includes: a new composition of matter (a composite comprising a naturally occurring in vivo cornea in an in situ eye together with at least one volume of vitrified non-naturally occurring corneal stromal tissue formed within the naturally occurring corneal stromal tissue) wherein the vitrified tissue is modified in structure and properties from its naturally occurring condition into a non-naturally occurring glass-like condition with modifications including but not limited to increased eletastic modulus; methods for producing and using the new composition of matter for modifying cortical structure and properties, including but not limited to corneal optical aberrations; wound closure adhesion and transplant adhesion; and a photovitrification system for producing the new composition of matter comprising at least one photon source with controllable treatment parameters. A reverse template can be added to corneal vitrification systems to increase vitrification and modifications of structure and properties.
摘要:
Tunable optical parametric amplifiers and oscillators that are pumped by the light from a tunable laser source are disclosed. One possible embodiment uses a tunable solid-state laser pump and an OPA medium or nonlinear crystal, such as potassium titanyl phosphate KTP or barium borate BBO or lithium borate LBO. The second harmonic output from a tunable solid-state laser is also used to pump the OPA medium. A singly or doubly resonant cavity design is preferably used to reduce the oscillation threshold (i.e., the required pump beam power) of the OPO.