Optische Werke G. Rodenstock

Rodenstock Gmbh

Herbert Pfeiffer

Helmut Altheimer

Gregor Esser

Walter Haimerl

Peter Baumbach

Andrea Welk

Rainer Dorsch

Jochen Brosig

Gunther Guilino

Rudolf Barth

Werner Mueller

Winfried Nikolaus

Norbert Awrath

Martin Wechs

Martin Zimmermann

Martin Zimmerman

Stephan Haser

Werner Müller

Monika Fuess

Christine Meixner

Manfred Rohrbach

Roswitha Fendt

Fritz Gruna

Werner M&uuml;ller

Guenther Guilino

Georg Esser

The invention relates to a method of producing a single-strength spectacle lens while taking into account an individual spectacle wearer's data, the single-strength spectacle lens having a rotationally symmetrical base surface and a rotationally symmetrical aspherical or atoric prescription surface, comprising the following steps: The invention also relates to a corresponding system for producing a single-strength spectacle lens and to an individual single-strength spectacle lens.

Individual single-vision spectacle lens

A method for manufacturing a spectacle lens, in which at first a semi-finished uncut spectacle lens (hereinafter referred to as a blank) is produced, i.e. a spectacle lens having merely one finished optical surface (hereinafter described as base surface); subsequently a prescription-optimized surface is computed according to the data of a spectacle lens prescription; and then the prescription-optimized surface is finished according to the computed data. The invention is characterized by the following method steps: after the production of the semi-finished spectacle lens the base surface is measured; the prescription-optimized surface is computed and finished taking into account not only the individual data of the spectacle prescription, but also the actual shape of the base surface.

Method for manufacturing an eyeglass lens

A method for representing and optimizing a double-progressive spectacle lens is characterized by the following steps: selecting a suitable coordinate system K2 for the representation of a back surface; selecting a suitable grid G for the representation of a spline of the back surface of a starting lens to be optimized in a coordinate system K2; assigning sagittal height data of the back surface to a spline (back surface spline); defining a position of a center of rotation of an eye; computing principal rays from the center of rotation of the eye through the starting lens at grid points of G; computing a length of a distance between points of penetration of a thus computed principal ray through a front surface and the back surface (oblique thickness); assigning data of the oblique thickness (thickness spline) to a spline; selecting a set of assessment positions at which an optical quality is computed for a target function; suitably selecting particular optical and geometrical stipulations which ideally should be satisfied at the assessment positions; defining the target function as a deviation of the quality of an actual spectacle lens from ideal values; starting the optimization; evaluating at each one of optimization steps the optical properties in a wearing position at the assessment points by means of surface properties to be computed and actual principal ray data; ending the optimization when the target function is below a particular value, or after a specifiable maximum number of optimization steps.

Method for representing and optimizing a double-progressive spectacle lens

A progressive spectacle lens having two aspherical and in particular progressive surfaces, i.e. surfaces contributing to the rise in the effect (addition Add.) from the distance vision portion to the near vision portion, in which the sagittal heights()of at least one (i) progressive surface (i=1,2) are chosen such that the sagittal height z of this respective surface at the edge of the spectacle lens given by() for&#x2267;0 and() forassume predefined values without this surface (i) or the other surface (j) having a reversal of curvature forming a supporting edge.

Progressive spectacle lens having two aspherical progressive surfaces

A method for optimizing an atoroidal surface of an optical lens, in particular a spectacle lens, having at least one plane of symmetry is characterized by a combination of the following features: dividing the atoroidal surface having at least one plane of symmetry into at least two regions separated by the at least one plane of symmetry; representing one of the separate regions (represented region) of this surface by a set of coefficients of B spline functions; computing sagittal heights of the represented region by B spline interpolation; computing sagittal heights in at least one other region by mirroring coefficients or coordinates at the at least one plane of symmetry; and optimizing the atoroidal surface only by varying the set of B spline coefficients of the represented region.

B-spline optimization of optical glasses especially spectacle glasses with planes of symmetry

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 &#x201c;as worn&#x201d; power being observed.

Progressive spectacle lens

A spectacle lens comprises a region (distance portion) designed for viewing at large distances and in particular 'to infinity'; a region (near portion) designed for viewing at short distances and in particular 'reading distances'; and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at the near reference point located in the near portion along a curve (principal line) veering towards the nose. The invention is distinguished by a combination of the following features: a change of magnification with a direction of sight is small; the magnification increases radially, starting from the distance reference point; the difference between the magnifications at the distance and near reference points is small.

Progressive spectacle lens with low magnifying differences

A method for computing a spectacle lens, which includes a region (distance portion) designed for viewing at large distances and in particular &ldquo;to infinity&rdquo;, a region (near portion) designed for viewing at short distances and in particular &ldquo;reading distances,&rdquo; and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases, from a value at a distance reference point located in the distance portion to a value at the near reference point located in the near portion along a curve (principal line) veering towards the nose, by an amount designated as addition power. The method includes the steps of stipulating as initial parameters a course of a projection x (y) of the principal line on an x,y plane, and also properties of the spectacle lens along the principal line whilst taking into account spherical, cylindrical, and possibly also prismatic prescription values and the addition power, as well as an interpupillary distance, and computing with these stipulations at least one strip of second order on a progressive surface of the spectacle lens, stipulating an object-distance function Al(y) which describes a change of object distance with a movement, in particular a lowering, of a glance, determining on each horizontal meridian of the progressive spectacle lens a point of penetration of a principal ray through the progressive surface, for which point a distance of a point of intersection of this principal ray with a plane which bisects the interpupillary distance is equal to the object distance given by the object-distance function Al(y), computing for the entirety of these points of penetration lying on the principal viewing line a course of the projection x&prime; (y) on the x,y plane, equating the course x (y) to x&prime; (y) and checking the coincidence, subsequently iteratively repeating the steps a. to e. until the projection x (y) of the principal line is equal (within given limits) to the course of the principal viewing line projection x&prime; (y) used for the computation of the respective surface.

Method for computing a progressive spectacle lens and methods for manufacturing a spectacle lens of this kind

Described is a spectacle lens comprising a region (distance portion) designed for viewing at large distances and in particular &ldquo;to infinity&rdquo;; a region (near portion) designed for viewing at short distances and in particular &ldquo;reading distances&rdquo;; and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at a near reference point located in the near portion along a curve (principal line) veering towards the nose. The invention is rendered distinct by a feature, amongst others, according to which trajectories of motion fulfill specific conditions.

Progressive spectacle lens producing only slight dynamic distortion

A spectacle lens comprises a region (distance portion) designed for viewing at greater distances, in particular, to infinity; a region (near portion) designed for viewing at short distances and, in particular, &ldquo;reading distances&rdquo;; and a progression zone located between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at 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. It is one of the characteristics of the invention that for minimizing the change of imaging properties with horizontal movements of the gaze along a curve described by the points of penetration of the principal rays through the front surface, these principal rays passing through a point having the coordinates (x&minus;dx, y, s) at the beginning of the movement and a point having the coordinates (x &plus;dx, y, s) at the end of the movement, at s&equals;&minus;40 mm and dx&equals;10 mm particular conditions apply.

Progressive spectacle lens exhibiting only slight dynamic change of the properties of use during a horizontal viewing movements

A spectacle lens comprises a region (distance portion) designed for viewing at large distances and in particular &ldquo;to infinity&rdquo;; a region (near portion) designed for viewing at short distances and in particular &ldquo;reading distances&rdquo;; and a progressive zone disposed between the distance portion and the near portion, in which a power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at a near reference point located in the near portion along a curve (principal line) veering towards a nose. The invention is distinct in that, for minimizing a change of binocular imaging properties with horizontal movements of glance, a lift (difference between a maximum and a minimum value occurring during a movement) of binocular imaging properties when a moving object is being followed, is smaller than a physiologically pre-determined limiting amount.

Progressive spectacle lens having only a small change of binocular properties during a movement of glance

Single vision spectacle lens

Method of manufacturing progressive ophthalmic lenses

Described is a spectacle lens comprising a region (distance portion) designed for viewing at large distances and in particular &ldquo;to infinity&rdquo;, a region (near portion) designed for viewing at short distances and in particular &ldquo;reading distances&rdquo;, and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at the near reference point located in the near portion along a curve (principal line) veering towards the nose. The invention is distinct in that the astigmatic deviation, i.e. the difference between the prescribed and the actual astigmatism along circles having a center lying 4 mm below the centration point and having a diameter of 10 to 40 mm satisfies the following conditions: two local minima occur which on a &ldquo;right-hand side spectacle lens&rdquo; are located at 95&deg;&plusmn;10&deg; (according to TABO) and at 280&deg;&plusmn;10&deg;, and on a &ldquo;left-hand side spectacle lens&rdquo; at 85&deg;&plusmn;10&deg; and 260&deg;&plusmn;10&deg;; and two local maxima occur which on both a &ldquo;right-hand side spectacle lens&rdquo; and also a &ldquo;left-hand-side spectacle lens&rdquo; are located at 215&deg;&plusmn;10&deg; and 335&deg;&plusmn;10&deg;.

Growing community of inventors

Munich, Germany

Herbert Pfeiffer