WO2023099537A1 - Dispositif et procédé de détermination d'une torsion d'une monture de lunettes - Google Patents

Dispositif et procédé de détermination d'une torsion d'une monture de lunettes Download PDF

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Publication number
WO2023099537A1
WO2023099537A1 PCT/EP2022/083798 EP2022083798W WO2023099537A1 WO 2023099537 A1 WO2023099537 A1 WO 2023099537A1 EP 2022083798 W EP2022083798 W EP 2022083798W WO 2023099537 A1 WO2023099537 A1 WO 2023099537A1
Authority
WO
WIPO (PCT)
Prior art keywords
exposure pattern
laser
spectacle frame
linear
glass
Prior art date
Application number
PCT/EP2022/083798
Other languages
German (de)
English (en)
Inventor
Apollonia Gründinger
Holger Wild
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
Priority to EP22823445.6A priority Critical patent/EP4341746A1/fr
Publication of WO2023099537A1 publication Critical patent/WO2023099537A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C13/00—Assembling; Repairing; Cleaning
    • G02C13/003—Measuring during assembly or fitting of spectacles
    • G02C13/005—Measuring geometric parameters required to locate ophtalmic lenses in spectacles frames
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C13/00—Assembling; Repairing; Cleaning
    • G02C13/003—Measuring during assembly or fitting of spectacles

Definitions

  • the invention relates to a device and a method for determining a rotation of a spectacle frame.
  • Twists on the eyeglass frame are undesirable in many respects.
  • a twisting of the spectacle frame can lead to undesirable optical effects and asthenopic complaints for the user, but also to unsatisfactory results in terms of optical appearance.
  • eyeglasses that have a twisted eyeglass frame are affected by not sitting properly on a surface and wobbling. Such twists are also referred to as propellers. If the two lenses in the frame have different forward inclinations, this is also called a "propeller".
  • a propeller has a negative effect on other frame parameters. For example, in an eyeglass frame with a propeller, the folded temples are not parallel.
  • brackets If the misalignment of the brackets is detected, but not that they are based on a twist, it can happen that another parameter is incorrectly changed instead, so that the folded brackets are parallel again.
  • a four-point support can be achieved despite twisting. Therefore, a "four-point support” does not rule out tilting or twisting of the lenses. If a so-called propeller occurs, the brackets are usually not open in parallel. So far, only experienced people have been able to recognize such errors.
  • a target/actual comparison based on standard values or standard ranges is not possible. Since the frames are very different from each other, there are hardly any standard values. But even a manufacturer-related comparison is hardly feasible because of the number of different spectacle frames is constantly increasing and with it the need to post-record target data in such a system. So it is well known that a change of spectacle frame collections typically takes place twice a year at many manufacturers.
  • the device has a laser-supported device for generating exposure patterns, in particular linear ones, on at least one of the glasses, preferably both glasses, wherein the laser-supported device is set up to create a first, in particular linear, exposure pattern and a second, in particular linear, exposure pattern at a distance from one another to produce, the laser having a wavelength which is at least partially reflected by the type of glass used for the glasses, at least a first part of an exposure pattern, in particular a line-like exposure pattern, being produced on the first glass and a second part of the same exposure pattern being produced on the second glass.
  • the device also has a recording device which is set up to record a reflection of, in particular, linear exposure patterns, in order to determine the spacing of reflection points along the, in particular, linear, exposure patterns in each case.
  • the device has an evaluation device which, based on the measured reflection points of the first, in particular linear, exposure pattern and the second, in particular linear, exposure pattern determines whether there is a twist, with a twist being present in particular when the distances for the first, in particular linear, exposure pattern and the second, in particular linear, exposure pattern are not substantially congruent from the first lens to the second lens.
  • the term “congruent” can mean that the average distance or the average difference between the two detected positions of the exposure pattern is less than about 1 mm, preferably less than about 0.5 mm, particularly preferably less than about 0.25 mm and especially less than about 0.1 mm.
  • the term “congruent” can also alternatively or additionally mean that the maximum distance or the maximum difference between the two detected positions of the exposure pattern is less than about 1 mm, preferably less than about 0.5 mm, particularly preferably less than about 0. 25 mm and in particular less than about 0.1 mm.
  • the laser-assisted device and the recording device are part of a 3D scanning system or a LIDAR system.
  • LIDAR stands for "Light Detection and Ranging”.
  • the laser-assisted device provides a scan, in particular a line scan, with a laser scanner, with the relative position between the laser scanner and the spectacle frame being variably adjustable, with the first, in particular linear, exposure pattern being able to be provided in a first position and in a second Position that is different from the first position, the second, in particular linear exposure pattern can be provided.
  • the laser-assisted device can be changed relative to the spectacle frame.
  • the spectacle frame can be changed relative to the laser-assisted device.
  • the laser-based device has two laser scanners, with a first laser scanner providing the first, in particular linear, exposure pattern and the second laser scanner providing the second, in particular linear, exposure pattern.
  • the recording device has one or more cameras.
  • the relative position between the receiving device and the spectacle frame can be variably adjusted.
  • the laser-assisted device and the recording device can be changed relative to the spectacle frame.
  • the spectacle frame can be changed relative to the receiving device.
  • One aspect relates to a method, in particular a computer-implemented or computer-assisted method, for determining a rotation of a spectacle frame, in particular using a device according to the invention.
  • Two glasses are arranged in the eyeglass frame provided. The procedure has the following steps:
  • exposure patterns in particular linear ones, on at least one of the glasses, preferably both glasses, by means of a laser-assisted device, with a first, in particular linear, exposure pattern and a second, in particular linear, exposure pattern being produced at a distance from one another, with at least a first part of one, in particular generating a line exposure pattern on the first glass and a second part of the same exposure pattern on the second glass; recording or detecting the reflected, in particular linear, exposure pattern by means of a recording device;
  • Fig. 1 schematically shows a pair of glasses in relation to a possible axis for rotation of a pair of glasses
  • FIG. 2 schematically shows a device according to embodiments of the invention.
  • a device 1 for determining a rotation of a spectacle frame is shown schematically in FIG. It is assumed here that—as shown in FIGS. 1 and 4a and 4b—two glasses G1, G2 are arranged in the spectacle frame B.
  • the device 1 has a laser-assisted device (L; L1, L2) for generating exposure patterns, in particular linear patterns, on at least one of the glasses.
  • the laser-based device L is set up to generate a first, in particular linear, exposure pattern L1 and a second, in particular linear, exposure pattern L2 at a distance from one another.
  • the light from the laser L has a wavelength that is at least partially reflected by the type of glass used for the glasses.
  • the light from the laser can have UV radiation, for example with a wavelength of about 405 nm.
  • at least a first part of an exposure pattern L1 or L2, in particular a linear one is produced on the first glass G1 and a second part of the same exposure pattern is produced on the second glass G2.
  • the device 1 also has a recording device K, which is set up to record a reflection of, in particular, linear exposure patterns L1, L2 in order to determine the spacing of reflection points along the, in particular, linear, exposure patterns in each case.
  • a recording device K which is set up to record a reflection of, in particular, linear exposure patterns L1, L2 in order to determine the spacing of reflection points along the, in particular, linear, exposure patterns in each case.
  • the device 1 has an evaluation device C which, based on the measured reflection points of the first, in particular linear, exposure pattern L1 and the second, in particular linear, exposure pattern L2, determines whether there is a twist, with a twist being present in particular when the distances for the first, in particular linear exposure pattern and the second, in particular linear exposure pattern are not essentially congruent or more generally the measured reflection points of the first linear exposure pattern L1 and the second linear exposure pattern L2 (lens for the right eye or right to lens for the left eye or . links) are different.
  • FIGS. 4a and 4b reflection points are shown for two linear exposure patterns L1 and L2 across two lenses G1, G2 of a spectacle frame.
  • the distances for the first, in particular linear, exposure pattern L1 and the second, in particular linear, exposure pattern L2 for the left glass G1 are essentially not congruent, ie a propeller is present.
  • the propeller can be seen in the right-left comparison, because there is a difference in distance (z-position) to the laser-assisted device L for the measured reflection points of the first, in particular linear, exposure pattern L1 from the first glass G1 to the second glass G2 or the second, in particular linear exposure pattern L2 from the first glass G1 to the second glass G2.
  • the distances for the first linear exposure pattern L1 and the second, in particular linear exposure pattern L2 for the left glass G1 are essentially congruent, ie there is no propeller.
  • no rotation can be seen in the right-left comparison, because there is no distance difference (z-position) to the laser-assisted device L for the measured reflection points of the first linear exposure pattern L1 and the second linear exposure pattern L2 from the first glass G1 to the second glass G2.
  • the device can be configured very differently in order to generate the linear patterns L1, L2 at different positions on the lenses G1, G2.
  • both the laser-assisted device L and the recording device K can be part of a 3D scanning system. If such systems are already used for other measurements, such a measurement, as described in the invention, can be cost-effectively integrated into a measurement process.
  • the laser-assisted device L provides a line scan with a laser scanner, the relative position between the laser scanner L and the spectacle frame B being variably adjustable, with the first, in particular linear, exposure pattern L1 being provided in a first position and in a second position, which differs from the first position, the second linear exposure pattern L2.
  • the change can include a rotation (about an axis parallel to a plane of the spectacle frame or parallel to a line through mirror-symmetrical points (e.g. the hinges)) and/or displacement (in a plane parallel to the areal extension of a spectacle frame B).
  • a rotation about an axis parallel to a plane of the spectacle frame or parallel to a line through mirror-symmetrical points (e.g. the hinges)
  • displacement in a plane parallel to the areal extension of a spectacle frame B.
  • the spectacle frame B is variable relative to the laser-assisted device L.
  • the change can include a rotation (e.g. around a line through mirror-symmetrical points (e.g. the hinges)) and/or displacement (in a plane of the areal extent of a spectacle frame B).
  • a rotation e.g. around a line through mirror-symmetrical points (e.g. the hinges)
  • displacement in a plane of the areal extent of a spectacle frame B.
  • linear exposure patterns are at a distance from one another and that a first part of a linear exposure pattern L1 or L2 is generated on the first glass G1 and a second part of the same linear exposure pattern is generated on the second glass G2.
  • the laser-based device L has two laser scanners, with a first laser scanner providing the first, in particular linear, exposure pattern L1 and the second laser scanner providing the second, in particular linear, exposure pattern L2.
  • This device 1 has the advantage that fewer moving parts have to be provided, so that the device requires little/no maintenance. In addition, this device 1 is faster because no time is required for the movement.
  • the recording device K can also be made for the recording device K to have a camera or a plurality of cameras at different positions (for example at the top, at the side, at the front).
  • the relative position between the receiving device K and the spectacle frame B can be variably adjusted.
  • the laser-assisted device L together with the recording device K can also be variable relative to the spectacle frame B.
  • the spectacle frame B can also be variable relative to the receiving device K.
  • the spectacle frame B can be held in a holder of the device 1, the position of the holder being changeable.
  • the recording device K and the laser-assisted device L can also be integrated in a common device, or else, as shown in FIG. 2c, can be listed as separate units.
  • an optical system can be used to compare and evaluate the symmetry in several spatial dimensions of the left and right halves of the spectacle frame. A difference indicates an error.
  • a laser line triangulation was carried out using a laser scanner (with a wavelength of 405 nm).
  • the distances between the glasses G1, G2 and the laser-assisted device L can be recorded.
  • two measurements were carried out at two positions, i.e. two line scans.
  • the distances from the left lens G1 to the laser-assisted device L and from the right lens G2 to the laser-assisted device L are the same for both measurements.
  • the lines for both glasses G1 and G2 are the same distance apart.
  • the data points in the diagram are essentially on top of each other (same z-position).
  • the spectacle frame B has a propeller
  • the distances from the left lens G1 to the laser-assisted device L and from the right lens G2 to the laser-assisted device L are different in the two measurements. Ie in case I the lines have a clearly recognizable distance to each other on one side, on the other glass they are very close together or L2 is above L1.
  • the data points in the diagram of glass G1 are at a different height than glass G2 (distance from G1 to the laser-assisted device L is different from glass G2).
  • the device 1 can also be used to check other parameters. This includes, for example, investigations as to whether the bores in so-called drill frames are symmetrical. For this purpose, the entire surface of the spectacle frame B, including the lenses, can be recorded (e.g. scanned). It is also possible to check whether the temples have the desired angle of 92° for standard glasses or a different angle for sports glasses when they are open. Likewise, the forward tilt or inclination can be checked for a desired angular range (for example approximately 6° to approximately 12°). Furthermore, it is also possible to check whether the bars are parallel / symmetrical when folded or whether a four-point support is guaranteed.
  • the device can be designed to be movable in relation to one another in order to be able to detect two lines at different positions on a spectacle frame B in chronological succession when using a single device.
  • the recording device K can have one or more cameras, for example exactly two cameras within a stereoscopic system.
  • the recording device K can have a camera that is movable. If movable elements are provided, they can be controlled by the evaluation unit C, so that the linear patterns L1 and L2 can be generated, recorded and evaluated one after the other.
  • the device 1 can also be controlled manually. The invention thus makes use of a multidimensional symmetry approach and is therefore in principle not dependent on the scanning technology.
  • the alignment of the entire spectacle frame B (including the front, temples, etc.) can be evaluated on the basis of the symmetry.
  • This approach allows a comparison of shapes G1/G2 and position G1/G2. If differences are found, there is usually an error.
  • manufacturing tolerances can be taken into account when determining that there is a fault.
  • the symmetry measurement of the invention can replace manual control activities and/or be based on a comparable basis.
  • the device has a laser-based device for generating linear exposure patterns on a frame and/or at least one of the lenses, with the laser-based device being set up to generate a first linear exposure pattern and a second linear exposure pattern at a distance from one another, with the Laser has a wavelength that is at least partially reflected by the type of glass used for the lenses, with a linear exposure pattern being generated at two different horizontal positions on both lenses (e.g.
  • the device also has a recording device which is set up to record a reflection of linear exposure patterns in order to determine the spacing of reflection points along the linear exposure patterns in each case.
  • the device has an evaluation device which, based on the measured reflection points of the first linear exposure pattern and the second linear exposure pattern, determines whether there is a twist, wherein a twist exists if the distances for the first linear exposure pattern and the second linear exposure pattern, in particular from the first glass to the second glass, are not substantially congruent.

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

Abstract

L'invention concerne un dispositif (1) pour déterminer une torsion d'une monture de lunettes (B), deux lentilles (G1, G2) étant disposées dans la monture de lunettes (B), présentant : * un dispositif assisté par laser (L ; L1, L2) pour générer des motifs d'éclairage sur au moins une des lentilles, ledit dispositif assisté par laser étant conçu pour générer un premier motif d'éclairage (L1) et un second motif d'éclairage (L2) à une certaine distance l'un de l'autre, le laser ayant une longueur d'onde qui est au moins partiellement réfléchie par le type de lentille utilisé pour les lentilles, et au moins une première partie du motif d'éclairage étant générée sur la première lentille (G1) et une seconde partie du même motif d'éclairage étant générée sur la seconde lentille (G2), * un dispositif de réception (K) qui est conçu pour recevoir une réflexion des motifs d'éclairage (L1, L2) pour déterminer la distance entre chaque point de réflexion le long du motif d'éclairage, et * un dispositif d'évaluation (C) qui détermine la présence d'une torsion sur la base des points de réflexion mesurés du premier motif d'éclairage (L1) et du second motif d'éclairage (L2). Une torsion est présente si les distances de la première lentille (G1) à la seconde lentille (G2) pour le premier motif d'éclairage et le second motif d'éclairage ne sont pas sensiblement identiques.
PCT/EP2022/083798 2021-12-01 2022-11-30 Dispositif et procédé de détermination d'une torsion d'une monture de lunettes WO2023099537A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22823445.6A EP4341746A1 (fr) 2021-12-01 2022-11-30 Dispositif et procédé de détermination d'une torsion d'une monture de lunettes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021213602.8 2021-12-01
DE102021213602.8A DE102021213602B3 (de) 2021-12-01 2021-12-01 Vorrichtung zur Bestimmung einer Verdrehung einer Brillenfassung

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WO2023099537A1 true WO2023099537A1 (fr) 2023-06-08

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EP (1) EP4341746A1 (fr)
DE (1) DE102021213602B3 (fr)
WO (1) WO2023099537A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015671A1 (de) * 2014-10-23 2016-04-28 Rodenstock Gmbh Vorrichtung und Verfahren zum Bestimmen von optischen Parametern
DE102016106121A1 (de) * 2016-04-04 2017-10-05 Carl Zeiss Ag Verfahren und Vorrichtung zum Bestimmen von Parametern zur Brillenanpassung
DE102016009810A1 (de) * 2016-08-11 2018-02-15 Rodenstock Gmbh Verfahren und Vorrichtung zur Überprüfung der Zentrierung zumindest eines Brillenglases
EP3809371A1 (fr) * 2019-10-15 2021-04-21 Carl Zeiss Vision International GmbH Procédé et dispositif de détermination d'un contour d'une rainure de monture
EP3809304A1 (fr) * 2019-10-18 2021-04-21 Carl Zeiss Vision International GmbH Procédé mis en oeuvre par ordinateur permettant de déterminer un modèle de remplacement paramétrique d'un élément de monture ainsi que dispositif et systèmes utilisant un tel procédé
US20210310799A1 (en) * 2018-12-21 2021-10-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus, measurement system and method for capturing an at least partially reflective surface using two reflection patterns

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015671A1 (de) * 2014-10-23 2016-04-28 Rodenstock Gmbh Vorrichtung und Verfahren zum Bestimmen von optischen Parametern
DE102016106121A1 (de) * 2016-04-04 2017-10-05 Carl Zeiss Ag Verfahren und Vorrichtung zum Bestimmen von Parametern zur Brillenanpassung
DE102016009810A1 (de) * 2016-08-11 2018-02-15 Rodenstock Gmbh Verfahren und Vorrichtung zur Überprüfung der Zentrierung zumindest eines Brillenglases
US20210310799A1 (en) * 2018-12-21 2021-10-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus, measurement system and method for capturing an at least partially reflective surface using two reflection patterns
EP3809371A1 (fr) * 2019-10-15 2021-04-21 Carl Zeiss Vision International GmbH Procédé et dispositif de détermination d'un contour d'une rainure de monture
EP3809304A1 (fr) * 2019-10-18 2021-04-21 Carl Zeiss Vision International GmbH Procédé mis en oeuvre par ordinateur permettant de déterminer un modèle de remplacement paramétrique d'un élément de monture ainsi que dispositif et systèmes utilisant un tel procédé

Also Published As

Publication number Publication date
DE102021213602B3 (de) 2023-04-13
EP4341746A1 (fr) 2024-03-27

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