EP3733015A1 - Reflektierender schmuckartikel - Google Patents

Reflektierender schmuckartikel Download PDF

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Publication number
EP3733015A1
EP3733015A1 EP19171771.9A EP19171771A EP3733015A1 EP 3733015 A1 EP3733015 A1 EP 3733015A1 EP 19171771 A EP19171771 A EP 19171771A EP 3733015 A1 EP3733015 A1 EP 3733015A1
Authority
EP
European Patent Office
Prior art keywords
predetermined
pattern
reflective
jewelry article
image
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Withdrawn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
EP19171771.9A
Other languages
English (en)
French (fr)
Inventor
Romain TESTUZ
Yuliy SCHWARTZBURG
Mark Pauly
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.)
Rayform SA
Original Assignee
Rayform SA
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 Rayform SA filed Critical Rayform SA
Priority to EP19171771.9A priority Critical patent/EP3733015A1/de
Priority to PCT/IB2020/054017 priority patent/WO2020222129A1/en
Publication of EP3733015A1 publication Critical patent/EP3733015A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C9/00—Finger-rings
    • A44C9/0053—Finger-rings having special functions
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C15/00—Other forms of jewellery
    • A44C15/0015—Illuminated or sound-producing jewellery
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C15/00—Other forms of jewellery
    • A44C15/004—Jewellery with monograms or other inscription
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/0007—Bracelets specially adapted for other functions or with means for attaching other articles
    • A44C5/0015—Bracelets specially adapted for other functions or with means for attaching other articles providing information, e.g. bracelets with calendars

Definitions

  • the present invention relates to a reflective jewelry article, in particular to a reflective ring, bracelet, or pendant.
  • Jewelry articles such as pendants, configured to project an image on a projection wall already exist.
  • This pendant comprises a magnifying lens encapsulating texts which are projected on the wall when the pendant is illuminated.
  • the projected texts are however blurry and dark and requires the use of a flashlight.
  • the texts are directly visible inside the pendant and thus fails to produce a surprising effect.
  • An aim of the invention is therefore to provide a jewelry article, in particular a ring, bracelet or pendant, configured to project crisp and bright images with high contrast, with any sort of light source.
  • Another aim of the invention is to provide a jewelry article comprising a 3D pattern barely visible to the naked eye on the jewelry article and which reflects an image on a projection surface which does not resemble to the 3D pattern of the jewelry article, thus providing a surprising effect.
  • a reflective jewelry article in particular a ring or bracelet, comprising at least one continuous reflective freeform surface configured to reflect light rays to a projection surface.
  • the at least one continuous reflective freeform surface is a computer-generated produced surface comprising a predetermined 3D pattern for displaying a predetermined image on the projection surface.
  • the at least one continuous reflective freeform surface is a computer-generated machined surface or stamped surface.
  • the surface normal of any point of the predetermined 3D pattern of said at least one continuous surface forms an angle, with respect to a reference surface, of at least 45°.
  • the predetermined 3D pattern of the at least one continuous reflective freeform surface has a globally convex curvature extending from one edge to an opposite edge of the at least one reflective surface in order to enlarge the size of the predetermined image on the projection surface.
  • the ring or bracelet comprises at least a first and a second distinctive continuous reflective freeform surface having different predetermined 3D patterns for displaying at least two distinctive predetermined images on said projection surface.
  • the at least first and second distinctive continuous reflective freeform surfaces are arranged to project the at least two distinctive predetermined images next to each other.
  • each of these two distinctive predetermined images represents a portion of a global image formed by the projection of said distinctive images.
  • the ring has a general annular shape.
  • the outer surface of the ring comprises the at least one continuous reflective freeform surface.
  • the outer or inner surface of the bracelet comprises the at least one continuous reflective freeform surface.
  • the bracelet may be for example a cut-off bracelet or a curb chain.
  • the preterminal image projected on the projection surface may be a text, a logo, an illustration or a photograph.
  • the 3D pattern of said at least one continuous reflective freeform surface has been generated based on a computer algorithm configured to process images that have zero brightness background such that the shape of the boundary of the projected image on the projection surface differs from the shape of the boundary of said predetermined 3D pattern.
  • the 3D pattern of said at least one continuous reflective freeform surface has been generated based on a computer algorithm configured to process images that have zero brightness background such that the projected image cannot be recognized by looking directly at said predetermined 3D pattern.
  • the predefined 3D pattern is barely visible to the naked eye.
  • the jewelry article is made of gold.
  • Another aspect of the invention relates to a method of manufacturing the reflective jewelry article as described above.
  • the method comprises the steps of:
  • the step of reproducing the predetermined 3D pattern on the blank jewelry article consists in machining a surface of the blank jewelry article to obtain the predetermined 3D pattern.
  • the machining consists in displacing a cutting tool over a surface of the size of the continuous reflective surface to be machined in at least two successive passes to remove successively at least a first and a second layer of material of the blank jewelry article to obtain the predetermined 3D pattern.
  • the first pass removes the majority of the excess material while the second pass removes the remaining of the material with high precision.
  • the distal end of the cutting tool is rounded with a radius smaller than the smallest radius of the predetermined 3D pattern.
  • the distal end of the cutting tool is made of a single crystal diamond.
  • the step of reproducing the predetermined 3D pattern on the blank jewelry article consists in: i) creating a die with a 3D mirror surface of the predetermined 3D pattern to be reproduced, and ii) die stamping the blank jewelry article to transfer the shape of the die to the surface of said blank jewelry.
  • Figure 2 shows an exemplary embodiment of a reflective jewelry article in the form of a ring 10.
  • the ring 10 comprises a surface 12 that is shaped with a specific so-called freeform surface defining a computer-generated 3D pattern which is barely visible to the naked eye.
  • the freeform surface of the reflective jewelry article is a continuous reflective freeform surface 12.
  • the continuous reflective freeform surface 12, as shown in Figure 8a must be understood within the context of the present invention as a surface with no vertical or near vertical walls as opposed, for example, to micro-facet and micro-patch arrays as shown in Figure 8b and described for example in patent US9188783B2 .
  • the continuous reflective freeform surface 12 could be defined as a surface comprising a 3D pattern, wherein the surface normal of any point on the 3D pattern, i.e. the vector (identified as N on Figure 8c ) perpendicular to any inclined portion of the surface anywhere on the 3D pattern, forms an angle ⁇ , with respect to a reference plane (dotted lines in Figure 8c ), of at least 45°.
  • the reference plane must be interpreted as the best fitting plane of the 3D pattern.
  • the method for producing the continuous reflective freeform surface 12 is well-described for example in EP2963463 . It consists in general in computing a continuous surface whose normals are such that incoming light rays are reflected into a prescribed illumination pattern (more rays are focused to the bright areas of the image). The normal field ensures that the distance traveled by the light rays is minimized which ensures that the surface is as flat, as smooth and as stable as possible. Other methods may be applied to shape the continuous reflective surface 12 to obtain the desired image projected on the projection surface 14.
  • a computer algorithm based on the above method is used to calculate the shape of a predetermined 3D pattern of the continuous reflective freeform surface 12 and a 3D image of the predetermined 3D pattern is generated in industry standard CAD.
  • the predetermined 3D pattern for a given image is then reproduced on a surface of a blank jewelry article.
  • This continuous reflective freeform surface may advantageously be obtained through continuously displacing a cutting tool, during a machining operation, along and against an entire surface of the size of the continuous reflective freeform surface without the need of lifting the tool away from the surface during a pass over the entire surface.
  • the continuous reflective freeform surface may also be advantageously obtained by die stamping a surface of a blank jewelry article with a die comprising a 3D mirror surface of a 3D pattern to be reproduced.
  • the continuous reflective freeform surface 12 reflects the incoming light rays 13 which are focused on a nearby flat projection surface 14 for displaying an image of 16 on the projection surface 14 as shown for example in Figures 4 and 5 .
  • the projected image 16 may be for example a text, a logo, a photography or any other visible pattern.
  • the predetermined 3D pattern is directly machined on a surface of the jewelry article using a CNC machine with a sharp cutting tool 40 to remove the excess material with high precision.
  • the cutting tool 40 is displaced along x, y, z cartesian coordinates to remove the excess material on the machined surface.
  • the cutting tool 40 may for example be controlled to remove successively a first and a second layer 42, 44 of the blank jewelry article through successive first and second passes over a surface of the size of the continuous reflective freeform surface in order to machine the predetermined 3D.
  • the first layer 42 preferably comprises the majority of the excess material to be removed while the second layer 44 comprises a small amount of the remaining material to be removed with high precision to obtain the final predetermined 3D pattern.
  • the distal end of the cutting tool 40 is rounded with a radius smaller than the smallest radius of the predetermined 3D pattern.
  • the distal end of the cutting tool 40 is made of a single crystal diamond.
  • the predetermined 3D pattern of the continuous reflective freeform surface must comprise a mirror-like surface for effective reflection of the predetermined image on the projection surface.
  • the surface of predetermined 3D pattern may need to be polished.
  • the polishing step may be done by applying on the surface to be polished a polishing cloth wheel comprising a polishing compound.
  • a die is created with a 3D mirror surface of the predetermined 3D pattern to be reproduced on a surface of the jewelry article.
  • the jewelry article is then die stamped to transfer the shape of the die to the surface of the jewelry article.
  • the light rays should hit the surface at an angle of around 45°.
  • the distance between the continuous reflective freeform surface 12 and the projection surface 14 should be around 2 to 10 times the width of the freeform surface 12.
  • a distance between 20 and 40mm, and preferably around 30mm is ideal.
  • a ring 10 may comprise an annular portion 10a and a reflection portion 10b comprising two distinct continuous reflective freeform surfaces 12a, 12b comprising each a different predetermined 3D pattern which is invisible or barely visible to the naked eye.
  • These two distinct continuous reflective freeform surfaces are configured to reflect incoming light rays to a projection surface in order to display distinctive images.
  • the two 3D patterns on the two distinctive free-form surfaces 12a, 12b may for example reflect on the projecting surface 14 two adjacent images comprising each one or more letters to form a word as illustrated by Figures 4 and 5 .
  • Figures 6 and 7 illustrate other exemplary embodiments of the invention where the continuous reflective freeform surface is realized on an annular ring 10 and bracelet 20 respectively.
  • the bracelet may be for example a cut-off bracelet 20 or a curb chain (not illustrated).
  • the continuous reflective freeform surface may be located on an outer surface 22a and/or on an inner surface 22b of the bracelet 20.
  • the incoming light rays may be reflected by the freeform surface such that they are focused on a resting surface when the bracelet 20 is removed and lies on the resting surface such as a table.
  • the inner surface 22 of the bracelet of slightly concave and the image is projected on the resting surface inside the bracelet 20.
  • the size of the projected image usually corresponds to the size of a free-form surface having a globally flat surface.
  • the continuous reflective freeform surface may have a globally convex surface in order enlarged the dimensions of the projected predefined image to be visible further away.
  • the globally convex surface has also the benefit to stabilize the projected predefined image which is therefore less prone to distortions when in real-life the relative position between the light source, the object comprising the continuous reflective freeform surface with the predetermined 3D pattern and the projection surface are not exactly the positions of the predefined setup parameters used to calculate the 3D pattern from a predefined image such as a text, a logo or a photography, etc. to be projected a projection surface.
  • FIG. 9a shows the word "LOVE" projected on a projection surface when the predefined distance between the continuous reflective freeform surface and the projection surface is 30mm which corresponds to one of the preset parameters used to calculate the 3D pattern of the freeform surface from the predefined image to be projected a projection surface.
  • the projected image appears to be distorted as shown in figure 9b where the continuous reflective free-form surface is situated 20mm further away from the predefined distance.
  • the 3D pattern of the continuous reflective freeform surface 12 is generated based on a computer algorithm configured to process images that have zero brightness background (complete black background). Accordingly, this continuous reflective freeform surface creates brighter images by focusing all the light to a small area which provides the following advantages: i) the edges of the 3D pattern do not reflect incoming light rays such that the shape of the boundary of the reflected image 16 on the projection surface 14 differs from the shape of the boundary of the 3D pattern as shown in 12a, and ii) the projected image cannot be recognized just by looking at the 3D structure which makes the effect more surprising.

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  • Adornments (AREA)
EP19171771.9A 2019-04-30 2019-04-30 Reflektierender schmuckartikel Withdrawn EP3733015A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19171771.9A EP3733015A1 (de) 2019-04-30 2019-04-30 Reflektierender schmuckartikel
PCT/IB2020/054017 WO2020222129A1 (en) 2019-04-30 2020-04-29 Reflective jewelry article

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19171771.9A EP3733015A1 (de) 2019-04-30 2019-04-30 Reflektierender schmuckartikel

Publications (1)

Publication Number Publication Date
EP3733015A1 true EP3733015A1 (de) 2020-11-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19171771.9A Withdrawn EP3733015A1 (de) 2019-04-30 2019-04-30 Reflektierender schmuckartikel

Country Status (2)

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EP (1) EP3733015A1 (de)
WO (1) WO2020222129A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7464773B1 (ja) 2023-03-08 2024-04-09 憲二 大林 装飾具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9188783B2 (en) 2011-09-09 2015-11-17 Disney Enterprises, Inc. Reflective and refractive surfaces configured to project desired caustic pattern
EP2963463A1 (de) 2014-07-02 2016-01-06 Ecole Polytechnique Fédérale de Lausanne (EPFL) Entwurf von refraktiven Oberflächen
EP3187343A1 (de) * 2015-12-31 2017-07-05 Master Dynamic Limited Verfahren zur herstellung einer markierung an einem artikel und ein artikel mit einer markierung darauf
WO2019063778A1 (en) * 2017-09-29 2019-04-04 Sicpa Holding Sa OPTICAL SAFETY THIN MEMBER AND METHOD FOR DESIGNING SAME

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9869866B2 (en) 2016-05-16 2018-01-16 Mitsubishi Electric Research Laboratories, Inc. Tailored freeform optical surface
US10119679B2 (en) 2016-10-18 2018-11-06 Mitsubishi Electric Research Laboratories, Inc. Freeform optical surface for producing sharp-edged irradiance patterns
US10234689B1 (en) 2018-03-09 2019-03-19 Mitsubishi Electric Research Laboratories, Inc. Compound optics with freeform optical surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9188783B2 (en) 2011-09-09 2015-11-17 Disney Enterprises, Inc. Reflective and refractive surfaces configured to project desired caustic pattern
EP2963463A1 (de) 2014-07-02 2016-01-06 Ecole Polytechnique Fédérale de Lausanne (EPFL) Entwurf von refraktiven Oberflächen
EP3187343A1 (de) * 2015-12-31 2017-07-05 Master Dynamic Limited Verfahren zur herstellung einer markierung an einem artikel und ein artikel mit einer markierung darauf
WO2019063778A1 (en) * 2017-09-29 2019-04-04 Sicpa Holding Sa OPTICAL SAFETY THIN MEMBER AND METHOD FOR DESIGNING SAME

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
LYNETTE GRODSKIY: "Material Insight: Rayform - Material ConneXion (Reflecting light image materials)", 29 April 2019 (2019-04-29), XP055623581, Retrieved from the Internet <URL:https://www.materialconnexion.com/material-insight-rayform/> [retrieved on 20190918] *
RAYFORM: "Rayform", YOUTUBE, 13 June 2016 (2016-06-13), pages 1 - 3, XP054979706, Retrieved from the Internet <URL:https://www.youtube.com/watch?v=IqrsptUdxHs> [retrieved on 20190919] *
RAYFORM: "Rayform, bracelet with nearly flat surface that reflects light as an image due to caustic effect", 14 September 2018 (2018-09-14), Facebook.com, XP055623655, Retrieved from the Internet <URL:https://www.facebook.com/RayformSA/> [retrieved on 20190918] *

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