摘要:
A spectroscopic instrument includes a first optical component for spatial spectral splitting of a polychromatic beam of light impinging onto the first optical component, an objective, which routes various spectral regions of the split beam of light onto differing spatial regions, and a sensor, situated downstream of the objective in the beam path of the beam of light, with a plurality of light-sensitive sensor elements. The sensor elements are arranged in the beam path of the split beam of light in such a manner that each sensor element registers the intensity of a spectral sector of the beam of light and the medians of the spectral sectors are situated equidistant from one another in the k-space, where k denotes the wavenumber.
摘要:
An interface unit for positioning an object to be irradiated in relation to a radiation source has at least one first positioning surface for positioning the interface unit in relation to the radiation source, and a second positioning surface for bearing on the object to be irradiated. The interface unit provides a path, which passes through the second positioning surface, for the radiation from the radiation source. According to the invention, the interface unit comprises an integrally produced interface body which forms both the at least one first positioning surface and the second positioning surface. The interface body is preferably produced from a plastic material by an injection compression molding method, in order to achieve the desired high manufacturing accuracy.
摘要:
A process for producing an interface unit and also a group of such interface units are specified. The interface unit exhibits a first reference surface for beaming in radiation, a second reference surface for emitting the radiation, and an axis extending in the direction from the first to the second reference surface. The production process comprises the steps of setting an optical path length of the interface unit between the first and second reference surfaces along the axis and the fixing of the set optical path length of the interface unit. The optical path length of the interface unit is set in such a way that radiation of a defined numerical aperture beamed in at the first reference surface exhibits a focus location that is predetermined with respect to the second reference surface in the direction of the axis. A precise and uniform focus location with respect to the second reference surface is obtained.
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 laser system for refractive surgery comprises a laser beam for generating laser beam pulses and optical means for directing these laser beam pulses as a working beam onto an eye. Some of the working radiation is extracted for optical coherence tomography, in order to measure geometrical structures in the cornea.
摘要:
A device and a computer program for material processing, in particular refractive eye surgery, operate with a pulsed femtosecond laser and the individual focal points are positioned in such a way that the spacings of neighboring focal points for the most part vary, in order to avoid a regular grating structure avoiding undesired diffraction phenomena.
摘要:
An optical imaging system comprises at least one deformable mirror (34) and an adjustment and control arrangement (36, 38) which is coupled to the mirror and is adapted to displace the image-side focal point (52) of the imaging system in the beam propagation direction by deformation of the mirror, particularly in accordance with a predetermined focal point displacement profile. The optical imaging system is preferably employed in a device for femtosecond laser surgery of the human eye, for example for corneal lenticle extraction.
摘要:
An apparatus for ophthalmic laser surgery comprises a contact surface for formative bearing contact of an eye to be treated, components for providing focussed, pulsed treatment laser radiation and for directing the same through the contact surface onto the eye, a measuring device for measuring the position of the contact surface along the direction of propagation of the treatment laser radiation, the measuring device providing position data representing the measured position of the contact surface at least one location of the contact surface, and an electronic process and control unit, which is connected to the measuring device and which is adapted to control the focus position of the treatment laser radiation in dependence on the position data. By measuring the position of the contact surface, the laser-surgery apparatus provides for compensation of unavoidable manufacturing tolerances of a contact element forming the contact surface, and thereby provides for precise referencing of the front surface of the eye in relation to the laser-surgery apparatus.
摘要:
An interface unit for positioning an object to be irradiated in relation to a radiation source has at least one first positioning surface for positioning the interface unit in relation to the radiation source, and a second positioning surface for bearing on the object to be irradiated. The interface unit provides a path, which passes through the second positioning surface, for the radiation from the radiation source. According to the invention, the interface unit comprises an integrally produced interface body which forms both the at least one first positioning surface and the second positioning surface. The interface body is preferably produced from a plastic material by an injection compression moulding method, in order to achieve the desired high manufacturing accuracy.
摘要:
A system for refractive ophthalmological surgery, in particular LASIK, has—in addition to the ablation laser and, where appropriate, further optical guidance means (18, 30)—a device (34) for optical coherence tomography as an integrated component, in order to make available results of measurement acquired with this device either for the purpose of representation on a display device and/or for the purpose of control of the ablation.