摘要:
There is provided an apparatus for recording a depth profile of a biological tissue, in particular a frontal eye section of a human eye, according to the principle of optical coherence tomography, comprising a light source adapted to generate a bundle of light rays, an interferometer arrangement having a beam splitter device adapted to spatially separate the bundle of light rays into a reference beam and a measurement beam directed toward the tissue, a reference beam deflection device adapted to deflect the reference beam, a beam superpositioning device adapted to spatially superimpose the deflected reference beam onto the measurement beam deflected by the tissue into a superpositioned beam, and a detector arrangement for detecting information in the superpositioned beam associated with the difference of the optical path length of the reference beam and the measurement beam.
摘要:
A process and an apparatus are proposed for determining optical aberrations of an eye with its optical system including the cornea and the lens. The process includes the reconstructing of wavefront aberrations of the eye as a deviation of the wavefront, determined by the optical system of the eye with a process of aberrometry, with respect to an ideal planar wavefront generated by an aberration-free eye model. A measured ocular length is employed for the aberration-free eye model.
摘要:
In certain embodiments, reducing opaque bubble layers (OBLs) comprises receiving information describing a tissue region of a tissue where laser pulses are applied to yield laser-induced optical breakdowns (LIOBs) in the tissue region. The LIOBs yield bubbles of gas. A concentration of the gas in the tissue region is estimated from the information. One or more laser parameters are adjusted in response to the concentration of the gas to satisfy a critical concentration rule.
摘要:
The invention relates to an apparatus for a laser-assisted eye-surgery treatment system, comprising a first image-acquisition unit that is designed to acquire a first image (39) of an eye to be treated. The apparatus further comprises a computer arrangement which is designed to detect at least one first feature (40′) of the eye by means of image processing of the first image, and to determine a position and an orientation of the first feature in a coordinate system (S′) of the treatment system. The computer arrangement is also designed to determine a position and an orientation of an incision (66′) to be produced in the eye in the coordinate system (S′) of the treatment system as a function of the determined position and orientation of the first feature (40′) in the coordinate system and as a function of a previously determined relative position and orientation of at least one second feature (64′) of the eye with respect to the first feature (40′).
摘要:
The invention relates to an eye-surgical laser apparatus, a use of said apparatus, and to a method for scanning the corneal tissue of an eye before or during eye surgery. The apparatus comprises optics that are adapted to focus a laser beam at a focus within a corneal tissue of an eye, and a detection element adapted to detect light that is formed, at the focus, as a frequency multiple and backscattered or forward emitted. Image information about the inner corneal tissue is then produced from the detected light.
摘要:
A system is provided for optically measuring internal dimensions of a sample object comprising internal interfaces at which the refraction index changes so that a portion of incident light is backreflected and/or backscattered and can be detected by means of optical coherence tomography. The system comprises at least one first OCT device adapted to measure internal dimensions in a first partial volume of the object and at least one second OCT device adapted to measure internal dimensions in a second partial volume of the same object, wherein the second partial volume is at least partially different from the first partial volume. The first and second OCT devices may share at least partially spatially superimposed first and second sample arms, which may have respective different focal lengths and pass through a common optical lens system toward the object
摘要:
A test device to calibrate the pulse energy of a laser device which provides pulsed laser radiation includes a measuring head with multiple measuring probes. The test device is used in such a way that by means of the laser radiation, multiple test ablations are made on a test surface, in an arrangement corresponding to the relative spatial arrangement of the measuring probes, and the depths of the test ablations are then measured, with simultaneous use of the multiple measuring probes of the measuring head.
摘要:
A test device to calibrate the pulse energy of a laser device which provides pulsed laser radiation includes a measuring head with multiple measuring probes. The test device is used in such a way that by means of the laser radiation, multiple test ablations are made on a test surface, in an arrangement corresponding to the relative spatial arrangement of the measuring probes, and the depths of the test ablations are then measured, with simultaneous use of the multiple measuring probes of the measuring head.
摘要:
There is provided an apparatus for recording a depth profile of a biological tissue, in particular a frontal eye section of a human eye, according to the principle of optical coherence tomography, comprising a light source adapted to generate a bundle of light rays, an interferometer arrangement having a beam splitter device adapted to spatially separate the bundle of light rays into a reference beam and a measurement beam directed toward the tissue, a reference beam deflection device adapted to deflect the reference beam, a beam superpositioning device adapted to spatially superimpose the deflected reference beam onto the measurement beam deflected by the tissue into a superpositioned beam, and a detector arrangement for detecting information in the superpositioned beam associated with the difference of the optical path length of the reference beam and the measurement beam.
摘要:
The invention relates to an apparatus for a laser-assisted eye-surgery treatment system, comprising a first image-acquisition unit that is designed to acquire a first image (39) of an eye to be treated. The apparatus further comprises a computer arrangement which is designed to detect at least one first feature (40′) of the eye by means of image processing of the first image, and to determine a position and an orientation of the first feature in a coordinate system (S′) of the treatment system. The computer arrangement is also designed to determine a position and an orientation of an incision (66′) to be produced in the eye in the coordinate system (S′) of the treatment system as a function of the determined position and orientation of the first feature (40′) in the coordinate system and as a function of a previously determined relative position and orientation of at least one second feature (64′) of the eye with respect to the first feature (40′).