摘要:
A method is disclosed for fixing at least one location in an examination field (9) with respect to a coordinate system (13). The method includes determining, in response to a request (65), coordinates of a first location (59) as a first coordinate set (x, y, z) allocated to the first location (59). A first recording and a second recording of topological data (69) in a spatially extended area around the first location (59) in the examination field (9) are obtained. The first and second recordings are compared to determine a displacement (&Dgr;x, &Dgr;y, &Dgr;z) of the first location (59) of the examination field (9) with respect to the coordinate system (13), the coordinates of the first coordinate set (x, y, z) allocated to the first location (59) are changed dependent upon the determined displacement (&Dgr;x, &Dgr;y, &Dgr;z) such that the changed coordinates substantially correspond to the coordinates of the first location (59) in the examination field (9) after the displacement thereof.
摘要:
A laser adapter 2 for mounting on a surgical microscope 4 includes a compactly configured laser 9 which supplies a therapeutic laser beam 10 at a suitable wavelength. In addition, a pulse energy monitoring device is provided in the laser adapter 4 which is used for the on-line energy measurement of the emitted laser pulses and whose output signals are applied as parameters for controlling the pulse energy emitted by the laser 9.
摘要:
For defined ablation of a surface, successive partial regions of equal surface area are acted on by a radiation source, preferably a laser, through an optical system. The partial regions are smaller as regards surface area than the whole surface to be processed, so that the respective radiation source can be dimensioned in a less costly manner. Telescope optics with conical surfaces serve as optical systems suitable for this purpose.
摘要:
An ophthalmic surgical microscope (100) has a microscope main objective (101) and a viewing beam path (105) which passes through the microscope main objective (101) for visualizing an object region. The ophthalmic surgical microscope (100) includes an OCT-system (140) for recording images of the object region (108). The OCT-system (140) includes an OCT-scanning beam (142) which is guided via a scan mirror arrangement (146) to the object region (108). An optic element (147) is provided between the scan mirror arrangement (146) and the microscope main objective (101). This optic element (147) bundles the OCT-scanning radiation exiting from the scan mirror arrangement (146) and transfers the same into a beam path which passes through the microscope main objective (101). Alternatively or in addition, the ophthalmic surgical microscope (100) includes an ophthalmoscopic magnifier lens (132) which can be pivoted into and out of the viewing beam path (105) and the OCT-scanning beam (142).
摘要:
A surgical microscope (100) has an illuminating module (120). The illuminating module contains an illuminating optic which images a field diaphragm (124) to a parallel illuminating beam path at infinity. The field diaphragm (124) is illuminated by a light source. The illuminating optic includes a first lens assembly and a second lens assembly which functions to image the field diaphragm (124) into the object region (108) via the microscope main objective (101) of the surgical microscope (100). An in-coupling element (128) is provided between the first lens assembly (125) and the second lens assembly (126) and this in-coupling element couples the OCT-scanning beam into the illuminating beam.
摘要:
The invention provides an optical measuring system and an optical measuring method, which are particularly useful for the acquisition of image data of a retina of an eye. Data acquisition is made by OCT measurements, wherein a quality of these measurement is improved by arranging an active optical element in the beam path.
摘要:
A laser cyclo-photocoagulation in the eye is monitored on-line by means of an ultrasonic biomicroscope, i.e., visual representations of the treated field, inclusive of the effects obtained in the tissue, are provided continuously on a display placed at the disposal of the attending doctor. The doctor decides, by means of the generated ultrasonic images, on the course of the further treatment. The choice is possible between different operating modes of the ultrasonic biomicroscope.
摘要:
An applicator for treatment of an elevated internal ocular pressure by means of laser radiation has a handpiece, which releasably surrounds a fiber optic light guide on its exit side end. A sleeve portion is releasably connected to the exit side end of the light guide, a condensing optical element being provided in the sleeve portion, optically dimensioned and arranged in the sleeve portion at a distance from the exit side end of the light guide such that the applied laser radiation can be focused in the ciliary body of the eye on contact of the sleeve portion with the surface of the eye.
摘要:
A surgical microscope (100) has viewing beams (109a, 109b) passing through a microscope imaging optic which includes a microscope main objective system (101) having a magnification system of variable magnification. The microscope imaging optic transposes a convergent viewing beam (109a, 109b) from the object region (114) into a parallel beam. The surgical microscope includes an OCT-system (120) for examining the object region (114). The OCT-system (120) makes available an OCT-scanning beam (190) which is guided through the microscope imaging optic.
摘要:
A surgical microscope (100) has a viewing beam path for main viewing and a secondary beam path (106) for viewing by another person. The surgical microscope (100) has a microscope main objective (101) through which the viewing beam path for main viewing and the viewing beam path (106) for secondary viewing pass. The surgical microscope (100) includes an OCT-system (120) for examining an object region. The OCT-system (120) includes an OCT-scanning beam (123) which is guided through the microscope main objective (101). In the viewing beam path (106) for secondary viewing, an in-coupling element (150) is provided to couple the OCT-scanning beam (123) into the viewing beam path (106) for secondary viewing and to guide the same through the microscope main objective (101) to the object region (108).