摘要:
An electronically controlled fixation light system is described for ophthalmic systems. The ophthalmic system can include an ophthalmic imaging device that generates an image of a portion of an imaged eye, a fixation light controller that includes an input module, configured to receive an input in relation to the image generated by the ophthalmic imaging device, and a control signal generator that generates an electronic fixation light control signal in response to the received input, and a fixation light source, configured to receive the fixation light control signal, and to generate a fixation light according to the received fixation light control signal. A surgeon can image a portion of an eye with the imaging device, determine a misalignment of the imaged eye relative to the imaging device based on the image, and control the fixation light with an electronic control signal to reduce the determined misalignment.
摘要:
A patient interface for an ophthalmic system can include an attachment module, attachable to the ophthalmic system, and a contact module, configured to accommodate a viscoelastic substance between the patient interface and a procedure eye. The viscoelastic substance can include a fluid, a liquid, a gel, a cream, an artificial tear, a film, an elastic material, or a viscous material. The refractive index of the viscoelastic substance can be within a range of approximately 1.24-1.52 at an operating wavelength of the ophthalmic system. The patient interface can further include input ports, output ports, and a suction system. It can be an integrated design or a multi-piece patient interface. The viscoelastic substance can be provided by injection, on the cornea, at the contact module, or in a space bounded by soft elastic films or membranes, such as in a bag.
摘要:
The invention describes techniques for the control of the spatial as well as spectral beam quality of multi-mode fiber amplification of high peak power pulses as well as using such a configuration to replace the present diode-pumped, Neodynium based sources. Perfect spatial beam-quality can be ensured by exciting the fundamental mode in the multi-mode fibers with appropriate mode-matching optics and techniques. The loss of spatial beam-quality in the multi-mode fibers along the fiber length can be minimized by using multi-mode fibers with large cladding diameters. Near diffraction-limited coherent multi-mode amplifiers can be conveniently cladding pumped, allowing for the generation of high average power. Moreover, the polarization state in the multi-mode fiber amplifiers can be preserved by implementing multi-mode fibers with stress producing regions or elliptical fiber cores These lasers find application as a general replacement of Nd: based lasers, especially Nd:YAG lasers. Particularly utility is disclosed for applications in the marking, micro-machining and drilling areas.
摘要:
A laser system for ophthalmic surgery includes a laser source to generate a pulsed laser beam, an XY scanner to receive the pulsed laser beam and to output an XY-scanning beam, scanned in two directions transverse to a Z direction, a Z scanner in a scanner housing to receive the XY-scanning beam and to output an XYZ-scanning beam scanned additionally in the Z direction, a mirror to deflect the XYZ-scanning beam received from the Z scanner, and an objective, in an objective housing, to receive the deflected XYZ-scanning beam and to focus the received XYZ-scanning beam onto a target region, wherein the scanner housing is separate from the objective housing.
摘要:
A laser system for ophthalmic surgery includes a laser source to produce a pulsed laser beam, an XY scanner to scan the pulsed laser beam in XY directions transverse to a Z axis, a Z scanner, to scan the XY scanned laser beam along the Z axis, and an objective, to focus the XYZ scanned laser beam into a target region.
摘要:
A patient interface device adapted to provide an interface between a cornea and a surgical laser system. A frame has an applanation end and an attachment end which is adapted to couple to the surgical laser system. A skirt is affixed to the applanation end of the frame and is adapted to seal against the anterior surface of the cornea to form a chamber. A lens is disposed near the applanation end of the frame and is supported by a flexible support which affixes the lens to the frame.
摘要:
Systems and methods of incising a portion of a material include creating a sub-surface separation in a region of the material, and incising a periphery of the region with a pulsed laser beam to produce an edge of the portion. The edge includes a periodically varying shape to secure the portion to the material when the portion is reintegrated. The system includes a laser producing the pulsed laser beam, a scanner operable in response to a control signal, and a controller coupled to the scanner. The controller produces the control signal. In response to the control signal, the scanner creates a sub-surface separation in the region with the pulsed laser beam and incises the periphery of the region with the pulsed laser beam to produce the edge with the periodically varying shape.
摘要:
A system for interfacing a surgical laser with an eye includes a first sensing element to couple to an output surface of the laser, an interface lens having second sensing element coupled to a first surface of the interface lens, and a detector coupled to the first sensing element. A second surface of the interface lens contacts the eye. The detector determines when the first sensing element contacts the second sensing element. A method for aligning the laser with the eye includes coupling the laser to the patient interface, sensing an electrical change indicating a position of the output surface with the interface lens, comparing the electrical change with a predetermined value to produce a correction, and re-positioning the laser with the correction.
摘要:
The present invention generally relates to a method and system for determining the position and alignment of a plane in relation to an intersecting axis and using that known position and alignment to allow for corrections to be made when using the plane as a reference plane. More particularly, the invention relates to a method and system for determining the angle of tilt of a planar surface in relation to a laser beam, and using the determined angle of tilt to calculate a correction factor to be applied to the laser beam. Briefly stated, the method and system ultimately calculates a correction factor, z-offset, that is applied when using the laser beam in a procedure.
摘要:
A system for ophthalmic laser surgery is disclosed. A laser source is adapted for performing ophthalmic laser surgery. A surgical tip is adapted to transmit light from the laser source toward an eye. A reference window is affixed to the surgical tip at a fixed position relative to the laser source. A patient interface is adapted to couple to the eye and to the surgical tip. An applanation lens is coupled to the patient interface. An optical sensor is adapted to detect interference generated between light reflected off the reference window and light reflected off the applanation lens during a coupling procedure between the surgical tip and the patient interface.