EP1602002A1 - Method for optimizing a progressive spectacle lens - Google Patents

Method for optimizing a progressive spectacle lens

Info

Publication number
EP1602002A1
EP1602002A1 EP03789360A EP03789360A EP1602002A1 EP 1602002 A1 EP1602002 A1 EP 1602002A1 EP 03789360 A EP03789360 A EP 03789360A EP 03789360 A EP03789360 A EP 03789360A EP 1602002 A1 EP1602002 A1 EP 1602002A1
Authority
EP
European Patent Office
Prior art keywords
spectacle lens
lens
object distance
function
progressive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03789360A
Other languages
German (de)
French (fr)
Inventor
Edda Wehner
Andrea Welk
Gregor Esser
Helmut Altheimer
Walter Haimerl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rodenstock GmbH
Original Assignee
Rodenstock GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rodenstock GmbH filed Critical Rodenstock GmbH
Publication of EP1602002A1 publication Critical patent/EP1602002A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/024—Methods of designing ophthalmic lenses
    • G02C7/025—Methods of designing ophthalmic lenses considering parameters of the viewed object

Definitions

  • the present invention relates to a method for optimizing a progressive spectacle lens.
  • the state-of-the-art optimization process determines new target specifications for each new design that must be developed separately. These technologies require a lot of work.
  • the object of the invention is to provide a method for optimizing a spectacle lens, wherein a progressive spectacle lens is derived from an original progressive spectacle lens with given target values S (x, y) and given object distance function Al (x, y).
  • the object is solved by the characterizing part of claim 1.
  • a procedure is specified with the following steps:
  • a value y is inserted in the function AI (y) and the value of the object distance function is obtained.
  • one searches for the coordinate y ⁇ at which the function A2 (y ') has the same value. This procedure is repeated for all y-values that are relevant for the glass, and thus a map U: y ⁇ y 1 is found point by point.
  • the target specification functions are "compressed" in the vertical direction.
  • the advantage with this new method is that the new specifications do not have to be found manually in a complex procedure and that they retain the characteristics of the original specifications Progressive glass won wisely despite the shortened or lengthened progression channel the design of the original glass.
  • the transformation function U (y) found is "rough" at the small-scale level. This can e.g. B. originate from rounding errors from the iteration process and has a negative effect on the derived target values. This roughness can be avoided by not using U (y) as the transformation function, but using a function V (y) which is very similar to the transformation function U (y) which is determined in a best-fit method and which Avoids micro roughness.
  • Fig. La shows the astigmatism of the original surface
  • Fig. Lb shows the astigmatism of the derived area
  • Fig. 2a shows the refractive index of the original surface
  • Fig. 2b shows the refractive index of the derived area
  • Fig. 3a shows the original object distance area
  • Fig. 3b shows the derived object distance area.
  • Table 1 shows the arrow heights of the original surface using the example of a rear surface and the arrow heights of the derived surface.
  • the first row contains the x coordinate, the first column the y coordinate,

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

The invention relates to a method for optimizing a progressive spectacle lens. The invention is characterized by the following steps: selecting a predetermined progressive addition lens with a given object distance function A1(x,y), selecting an object distance function A2 (x=xo,y) along the main line of vision of the predetermined progressive addition lens for a spectacle lens to be derived therefrom; finding representation U:y→y' along the main line of vision in such a way that the corresponding value y' can be calculated for every value of y, wherein A1 (x=xo, y) = A2 (x=xo, y'), calculating the theoretical values S(x,y) wherein S(x,y')=S(x,U(y)).

Description

Verfahren zum Optimieren eines progressiven BrillenglasesProcess for optimizing a progressive lens
BESCHREIBUNGDESCRIPTION
Die vorliegende Erfindung betrifft ein Verfahren zum Optimieren eines progressiven Brillenglases.The present invention relates to a method for optimizing a progressive spectacle lens.
Mit dem Optimierungsverfahren vom Stand der Technik werden für jedes neu zu entwickelnde Design neue Sollvorga- ben ermittelt, welche jeweils separat zu entwickeln sind. Bei diesen Technologien ist ein erheblicher Arbeitsaufwand nötig.The state-of-the-art optimization process determines new target specifications for each new design that must be developed separately. These technologies require a lot of work.
Bei den sogenannten Least-squares-Optimierungen definiert man an allen Bewertungsstellen eines Brillenglases Idealwerte. Diese Idealwerte legen fest, wie das Brillenglas am Ende des Optimierungsverfahren aussehen sollte. Dabei minimiert der Optimierungsprozess die Differenz der aktuellen Werte und der Sollvorgaben über alle Bewertungs- stellen. Wenn nun ein Glas entwickelt werden soll, das über frei wählbare Progressionszonenlängen verfügen soll, muß für jede Progressionslänge eine entsprechende Sollvorgabe ermittelt werden. Solche Verfahren sind aufwendig und beinhalten einen hohen Anteil an manueller Arbeit am Computer.In the so-called least squares optimizations, ideal values are defined at all evaluation points of a lens. These ideal values determine how the lens should look at the end of the optimization process. The optimization process minimizes the difference between the current values and the target values across all assessment points. If a glass is to be developed that should have freely selectable progression zone lengths, a corresponding target specification must be determined for each progression length. Such procedures are complex and involve a high proportion of manual work on the computer.
Aufgabe der Erfindung ist es, ein Verfahren zum Optimieren eines Brillenglases anzugeben, wobei aus einem originalen progressiven Brillenglas mit gegebenen Sollwerten S(x,y) und gegebener Objektabstandsfunktion Al(x,y) ein progressives Brillenglas abgeleitet wird. Die Aufgabe wird durch den kennzeichnenden Teil des Anspruchs 1 gelöst. Es wird ein Verfahren angegeben, wobei folgende Schritte vorhanden sind:The object of the invention is to provide a method for optimizing a spectacle lens, wherein a progressive spectacle lens is derived from an original progressive spectacle lens with given target values S (x, y) and given object distance function Al (x, y). The object is solved by the characterizing part of claim 1. A procedure is specified with the following steps:
- Auswahl eines vorgegebenen Gleitsichtglases mit einer vorgegebenen Objektabstandsfunktion Al(x,y) ,Selection of a predetermined progressive lens with a predetermined object distance function Al (x, y),
Auswahl einer Objektabstandsfunktion A2(x=x0,y) entlang der Hauptblicklinie des vorgegebenen Gleitsichtglases für ein abzuleitendes Brillenglas,Selection of an object distance function A2 (x = x 0 , y) along the main line of sight of the specified progressive lens for an eyeglass lens to be derived,
Auffinden der Abbildung U:y—>y' entlang der Hauptblicklinie derart, dass für jeden Wert von y derjenige Wert y' berechnet wird, für den gilt: Al(x=x0,y) = A2(x=x0,y'),Find the map U: y—> y 'along the main line of sight in such a way that for each value of y the value y' is calculated for which: Al (x = x 0 , y) = A2 (x = x 0 , y '),
Berechnung der Sollwerte S(x,y) bei S(x,y')=S(x,U(y)) .Calculation of the target values S (x, y) with S (x, y ') = S (x, U (y)).
Somit ist Ausgangspunkt die Objektabstandsflache Al(x,y), wobei x eine horizontale und y eine vertikale Koordinate darstellen. Betrachtet man den Verlauf dieser Ob ektabstandsflache entlang der Hauptblicklinie x0(y), so ergibt sich für jedes progressive Brillenglas eine eindimensionale Funktion für den Objektabstand AI (x=xo (y) ,y) . Gleit- sichtgläser mit unterschiedlichen Progreεsionslängen unterscheiden sich durch unterschiedliche Ob ektabstands- flachen. Zum Ableiten eines Glases mit einer Ob ektabstandsfunktion A2 (y) von einem Progressivglas mit einem Ob ektabstand AI (y) entlang der Hauptblicklinie geht man folgendermaßen vor:The starting point is thus the object distance area Al (x, y), where x represents a horizontal and y a vertical coordinate. If one looks at the course of this object distance area along the main line of sight x 0 (y), there is a one-dimensional function for the object distance AI (x = x o (y), y) for each progressive spectacle lens. Antifriction glasses with different progression lengths differ by different object spacing. To derive a lens with an object distance function A2 (y) from a progressive lens with an object distance AI (y) along the main line of sight, proceed as follows:
Es wird ein Wert y in die Funktion AI (y) eingesetzt und man erhält so den Wert der Ob ektabstandsfunktion. Mittels eines iterativen numerischen Verfahrens sucht man die Koordinate yλ, an der die Funktion A2(y') denselben Wert hat. Dieses Verfahren wird für alle y-Werte, die für das Glas relevant sind, wiederholt und somit findet man punktweise eine Abbildung U:y → y1.A value y is inserted in the function AI (y) and the value of the object distance function is obtained. Using an iterative numerical method, one searches for the coordinate y λ at which the function A2 (y ') has the same value. This procedure is repeated for all y-values that are relevant for the glass, and thus a map U: y → y 1 is found point by point.
Die nachfolgende Berechnung der Sollwerte für das neue Brillenglas wird bei x = U(y) durchgeführt.The subsequent calculation of the target values for the new spectacle lens is carried out at x = U (y).
Somit werden die Sollvorgabefunktionen in vertikaler Richtung „gestaucht" . Der Vorteil bei diesem neuen Verfahren besteht darin, dass die neuen Vorgaben nicht manu- eil in einer aufwendigen Prozedur gefunden werden müssen und dass sie die Charakteristik der originalen Vorgaben behalten. Somit behält ein auf diese Weise gewonnenes Progressivglas trotz des verkürzten oder verlängerten Progressionskanals das Design des originalen Glases.Thus, the target specification functions are "compressed" in the vertical direction. The advantage with this new method is that the new specifications do not have to be found manually in a complex procedure and that they retain the characteristics of the original specifications Progressive glass won wisely despite the shortened or lengthened progression channel the design of the original glass.
Gerade bei niedrigen Additionen kann es gelegentlich vorkommen, daß die gefundene Transformationsfunktion U(y) auf kleinskaligem Niveau „rauh* ist. Dies kann z. B. von Rundungsfehlem aus dem Iterationsprozess stammen und wirkt sich negativ auf die abgeleiteten Sollvorgaben aus. Diese Rauhigkeit kann vermieden werden indem man als Transformationsfunktion nicht U(y) verwendet, sondern eine Funktion V(y) , die der Transformationsfunktion U(y) sehr ähnlich ist, die man in einem Best-Fit-Verfahren er- mittelt und welche die Mikrorauhigkeiten vermeidet.Especially with low additions, it can occasionally occur that the transformation function U (y) found is "rough" at the small-scale level. This can e.g. B. originate from rounding errors from the iteration process and has a negative effect on the derived target values. This roughness can be avoided by not using U (y) as the transformation function, but using a function V (y) which is very similar to the transformation function U (y) which is determined in a best-fit method and which Avoids micro roughness.
Abb. la zeigt den Astigmatismus der originalen FlächeFig. La shows the astigmatism of the original surface
Abb. lb zeigt den Astigmatismus der abgeleiteten FlächeFig. Lb shows the astigmatism of the derived area
Abb. 2a zeigt den Brechwert der originalen FlächeFig. 2a shows the refractive index of the original surface
Abb. 2b zeigt den Brechwert der abgeleiteten FlächeFig. 2b shows the refractive index of the derived area
Abb. 3a zeigt die originale ObjektabstandsflacheFig. 3a shows the original object distance area
Abb. 3b zeigt die abgeleitete Objektabstandsflache.Fig. 3b shows the derived object distance area.
In der Tabelle 1 sind die Pfeilhöhen der Originalfläche am Beispiel einer Rückfläche und die Pfeilhöhen der abgeleiteten Fläche dargestellt. Die jeweils erste Zeile enthält die x-Koordinate, die erste Spalte die y-Koordinate , Table 1 shows the arrow heights of the original surface using the example of a rear surface and the arrow heights of the derived surface. The first row contains the x coordinate, the first column the y coordinate,

Claims

PATENTANSPRÜCHE
1. Verfahren zum Optimieren eines progressiven Brillenglases, gekennzeichnet durch die folgenden Schritte:1. Method for optimizing a progressive spectacle lens, characterized by the following steps:
Auswahl eines vorgegebenen Gleitsichtglases mit einer vorgegebenen Objektabstandsfunktion Al(x,y),Selection of a given progressive lens with a given object distance function Al (x, y),
Auswahl einer Objektabstandsfunktion A2(x=x0,y) entlang der Hauptblicklinie des vorgegebenen Gleitsichtglases für ein abzuleitendes Brillenglas, - Auffinden der Abbildung U:y—>y' entlang der Hauptblicklinie derart, dass für jeden Wert von y derjenige Wert y' berechnet wird, für den gilt: Berechnung der Sollwerte S(x,y) bei S(x,y')=S(x,U(y) ) .Selection of an object distance function A2 (x = x 0 , y) along the main line of sight of the specified progressive lens for a spectacle lens to be derived, - finding the image U: y—> y 'along the main line of sight in such a way that the value y' is calculated for each value of y for which the following applies: Calculation of the target values S (x, y) with S (x, y ') = S (x, U (y)).
2. Verfahren gemäß Anspruch 1 , dadurch gekennzeichnet, dass die Transformationsfunktion U(y) eine Best-Fit- Funktion V(y) an die Funktion U(y) ist. 2. The method according to claim 1, characterized in that the transformation function U (y) is a best fit function V (y) to the function U (y).
3. Verfahren gemäß den Ansprüchen 1 und 2 , dadurch gekennzeichnet, dass das abgeleitete Brillenglas mit den ermittelten Sollvorgaben S(x,y') mit y'= U(y) oder y'= V(y) mit einer Optimierungsmethode, insbesondere mit einem Least- Squares-Verfahren optimiert wird.3. The method according to claims 1 and 2, characterized in that the derived spectacle lens with the determined target values S (x, y ') with y' = U (y) or y '= V (y) with an optimization method, in particular with a least squares process is optimized.
4. Verfahren gemäß den Ansprüchen 1-3, dadurch gekennzeichnet, dass die ermittelte Fläche auf der Vorder- oder Rückfläche liegt. 4. The method according to claims 1-3, characterized in that the determined surface is on the front or back surface.
EP03789360A 2003-03-10 2003-12-19 Method for optimizing a progressive spectacle lens Withdrawn EP1602002A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10310354A DE10310354B4 (en) 2003-03-10 2003-03-10 Method for optimizing a progressive spectacle lens
DE10310354 2003-03-10
PCT/EP2003/014619 WO2004081634A1 (en) 2003-03-10 2003-12-19 Method for optimizing a progressive spectacle lens

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EP1602002A1 true EP1602002A1 (en) 2005-12-07

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US (1) US7168805B2 (en)
EP (1) EP1602002A1 (en)
JP (1) JP2006520004A (en)
DE (1) DE10310354B4 (en)
WO (1) WO2004081634A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8840245B2 (en) * 2007-01-25 2014-09-23 Rodenstock Gmbh Flexible progressive lens optimizer
DE102010049168A1 (en) * 2010-10-21 2012-04-26 Rodenstock Gmbh Regulation and individualization-dependent modification of the temporal peripheral target astigmatism and adaptation of the object distance function to changed object distances for proximity and / or distance

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JP4425350B2 (en) * 1996-04-04 2010-03-03 カール・ツァイス・ヴィジョン・オーストラリア・ホールディングス・リミテッド Progressive lens element, design method and use thereof
ATE322032T1 (en) * 2000-04-25 2006-04-15 Rodenstock Gmbh METHOD FOR CALCULATION OF A PROGRESSIVE EYEGLASSE LENS AND METHOD FOR PRODUCING SUCH A EYEGLASSE LENS
US6655803B1 (en) * 2000-06-01 2003-12-02 Inray Ltd. Wavefront method for designing optical elements
DE10104700A1 (en) * 2001-02-02 2002-10-02 Rodenstock Optik G Process for the representation and optimization of a double progressive spectacle lens
DE10121133B4 (en) * 2001-04-30 2005-04-07 Rodenstock Gmbh Method for producing a spectacle lens taking into account the optimal, individual progression length
ES2178975B1 (en) 2001-06-29 2004-04-01 Universitat De Les Illes Balears ENERGY ISOTONIC DRINK AND OBTAINING PROCEDURE.
DE10140656A1 (en) * 2001-08-24 2003-03-13 Rodenstock Optik G Process for designing and optimizing an individual lens

Non-Patent Citations (1)

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Title
See references of WO2004081634A1 *

Also Published As

Publication number Publication date
US20060055881A1 (en) 2006-03-16
JP2006520004A (en) 2006-08-31
DE10310354A1 (en) 2004-09-23
US7168805B2 (en) 2007-01-30
WO2004081634A1 (en) 2004-09-23
DE10310354B4 (en) 2006-07-27

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