Abstract:
A spectacle lens is provided with a region (distance portion) designed for viewing at greater distances and, in particular, “to infinity”, a region (near portion) designed for viewing at short distances and, in particular, “reading distances”, and a progression zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from the value in the distance reference point located in the distance portion to the value at the near reference point located in the near portion along a line (principal meridian) curving towards the nose. The invention is marked by specific conditions for the astigmatic deviation and/or the mean “as worn” power being observed.
Abstract:
Compounds of general formula I as well as pharmaceutically acceptable salts and esters thereof, are potent inhibitors of neuropeptide Y and can be used in the form of pharmaceutical preparations for the treatment or prevention of various disease states and related morbidities including obesity.
Abstract:
What is described here is a method of manufacturing progressive ophthalmic lenses whereof each is produced in correspondence with the individual data of a specific spectacle wearer, and whereof each presents a first surface having a defined surface power value in the surface apex, and presents a non-spherical second surface (prescription surface) whose surface power varies along a line (referred to as principal line in the following) that follows at least approximately the main line of sight when the view is lowered, such that the ophthalmic lens produces a first effect in a first reference point, which is suitable for viewing in a first distance envisaged for the respective application, and that this effect varies along the principal line by a predetermined value (addition Add) to a second value present in a second reference point, which is suitable for viewing in a second distance envisaged for the respective application, and whose second surface possibly presents a surface astigmatism optionally for partly compensating an ocular astigmatism and/or the astigmatism of oblique bundles. The inventive method excels itself by the following steps of operation: initially, ophthalmic lens blanks (blanks) are produced with a finished first surface in a defined—particularly comparatively narrow—grading of the surface power value, starting out from the individual data, specifically at least the respective required first effect Df the addition Add and possibly the value and the axial position of the ocular astigmatism of the spectacle wearer for whom the respective ophthalmic lens is intended, and on the basis of further design data, a first surface with a defined surface power value D, is selected and the second surface is so computed that the surface power value D2f of the second surface, which is required in the first reference point, is adjusted in correspondence with the respective selected surface power D, of the first surface so that, as a function of the respective design data for one and the same first effect D, and one and the same addition Add and possibly also one and the same value and axial position of the ocular astigmatism, different pairings of first surfaces, which are distinguished from each other at least with respect to the surface power value D1 and of associated second surfaces computed on an individualized basis in each case are achieved.
Abstract:
An x-ray tube, in addition to an anode and a cathode arrangement, has first and second electrodes that are located in an evacuated housing provided with a beam exit window. The anode and the first electrode are at potentials that are positive in comparison to the potentials of the cathode arrangement and the second electrode. Further, the first and the second electrode are arranged lying opposite one another such that secondary electrons emanating from the anode must pass through the space located between the first and the second electrode in order to proceed to the beam exit window. These secondary electrons are thus substantially all prevented from reaching the beam exit window, thereby avoiding excessive heating of the beam exit window.
Abstract:
A planetary gear extruder for the compounding and extrusion of thermoplastic materials, in which an annular groove is formed in the metallic stop ring to receive a ceramic body which is engageable by the forward ends of the planetary spindles in order to reduce friction. A ceramic body may additionally also be arranged in a recess in the end face of each of the planetary spindles, aligned with and adapted to engage the ceramic body mounted in the stop ring. As a result, the coefficients of friction between the stop ring and the end faces of the spindles are reduced considerably, consequently reducing the wear on the planetary spindles themselves and the central spindle.
Abstract:
A method for applying a transparent, conductive indium-tin oxide coating on a substrate of amorphous, hydrogen-containing silicon wherein an unheated substrate of amorphous hydrogen-containing silicon is treated with sources of indium and tin in a first stage while maintaining a low partial pressure of oxygen until a partial coating is built-up, then reducing the oxygen partial pressure in the coating zone in a second stage and continuing the coating until an additional coating thickness is built-up, followed by heating the coated substrate in an oxygen-containing atmosphere at a temperature less than 250.degree. C.
Abstract:
A circuit for unilaterally scanning teletype characters wherein the characters are supplied to an integrating circuit and to an impulse circuit wherein the impulse circuit can be controlled by the step changes of a character. A comparator circuit receives the output of the integration circuit and assumes a definite condition with each step change through a switch which is controlled by the impulses of the impulse circuit and a reference signal is supplied to the comparator circuit and the reference signal can be adjusted according to the desired delay of the descending or ascending edge of the step changes in the characters.
Abstract:
The present invention relates in summary to a method for checking and/or determining user data of a spectacle lens user comprising providing subjective data of a spectacle lens user, wherein the subjective data comprise at least subjective refraction data, providing objective refraction data of the spectacle lens user, comparing at least one subset of the subjective refraction data with at least one subset of the objective refraction data and determining a comparison result, matching at least the subset of the subjective refraction data to the objective refraction data on the basis of the comparison result under the assumption that the comparison result fulfills at least one predetermined comparison condition, otherwise maintaining at least the subset of the subjective refraction data and/or providing a message containing the comparison result, and to a further method, a computer program product and two devices for checking and/or determining user data.
Abstract:
A method and device for calculating design parameters of a design of a progressive spectacle lens on the basis of a predetermined design polygon. The design parameters are calculated by specifying a point within the design polygon, in which the specified point defines the progressive spectacle lens design, and then determining a value of each design parameter at the specified point by an interpolation of at least part of the predetermined values at the corner points and, optionally, of at least part of the predetermined values of the design parameter at the at least one additional point.
Abstract:
The invention relates to a method for remote-control programming and to a machine control system 2 for performing the method. To refine the method so as to simplify and shorten an execution operation of a control program source yet automatically avoid version conflicts between the control program source and the compilate in the machine control system, it is proposed that the program source 3a stored in memory in the machine control system be executed by means of a programming device 1, and after the execution, the compilate of the executed program source is generated and stored in memory in the machine control system, where it is made available to a control module.