Methods of designing and fabricating custom-fit eyeglasses using a 3D printer

• US 9,341,867 B1
• Filed: 01/16/2015
• Issued: 05/17/2016
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Kim, James Chang Ho
• Primary Examiner(s): Dinh, Jack
• Application Number:
  US14/598,270
• Time in Patent Office: 487 Days
• Field of Search: 351/204, 351/227, 351/178
• US Class Current: 1/1
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61B 3/111 for measuring interpupillary distance
• CPC Class Codes: A61B 5/103 Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes A61B5/08 takes precedence; measuring aids for tailors A41H1/00; measuring instruments specially adapted for dentistry A61C19/04
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 30/00 Apparatus for additive manufacturing; Details thereof or accessories therefor
• CPC Class Codes: B33Y 50/00 Data acquisition or data processing for additive manufacturing
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: G02C 13/003 Measuring during assembly or fitting of spectacles
• CPC Class Codes: G02C 13/005 Measuring geometric parameters required to locate ophtalmic lenses in spectacles frames apparatus for testing or instruments for examining the eyes per se A61B3/00; machines or devices and accessories for grinding the edges of lenses using spectacles as a template B24B9/144
• CPC Class Codes: G02C 2200/14 Laminated frame or frame portions
• CPC Class Codes: G02C 2202/16 Laminated or compound lenses
• CPC Class Codes: G02C 7/027 considering wearer's parameters

Abstract

The disclosed technology describes methods for the selection, design and production of custom-fit eyeglasses, using a 3D printer. Embodiments include an eye examination and biometric measurements of a patient. The data can be used to produce custom-fit eyeglass frames. Eyeglass selection is facilitated by the display of a selection of various frames in both digital and physical form. A 3D version of the patient'"'"'s head may be created from digital images, which can be used to produce a final version of the eyeglass frame. Lens dimensions may be traced and the trace used to modify the eyeglass frame. Half of an eyeglass frame may be generated, from which a mirror image is created, and a final frame produced from the resulting image. Also disclosed is an electronic device system which receives, processes and transmits data for the production of custom-fit eyeglass frames.

Claims

1. A method of 3D printing eyeglasses comprising the steps of:

(a) conducting a patient eye examination and determining said patient'"'"'s optical specifications for vision correction, said optical specifications including at least two measurements selected from eye strength, refractive error, sphere, cylinder, axis and prism;

(b) measuring biometric data of a head of said patient, including at least two of a distance between said patient'"'"'s pupils, frontal curvature of patient'"'"'s skull measured from temple to temple, distance from a front of said patient'"'"'s temples to a back of said patient'"'"'s ear, and dimensions and shape of said patient'"'"'s eyes and bridge of the nose;

(c) selecting an eyeglass frame from a plurality of eyeglass frames, each representative of a different style, wherein a style is defined as having at least a distinct thickness between a top of said frame and a lens opening, left and right arms, a distinct bridge for a nose, and a distinct lens opening width or height compared to other styles exhibited;

(d) making a determination of lens dimensions which match said selection of said style of eyeglass frame;

(e) printing said selection of said style of eyeglass layer by layer with a three-dimensional printer, after first modifying a shape of at least two different and separate portions of said selection of said style of eyeglass frame, using said patient biometric data, a color of at least a part of said selection of said style of eyeglass frame, and adding at least one ornamental design selected by said patient to said selection of said style of eyeglass frame.

2. The method of claim 1, further including a step of modifying a shape of hinges for said selected style based on said modifying said shape of said eyeglass frame to match said printed eyeglass frame dimensions and printing such modified hinges.

3. The method of claim 1, wherein said step of exhibiting a plurality of eyeglass frames comprises a combination of exhibiting actual eyeglass frames and selectable electronically displayed versions thereof, showing examples of said eyeglass frames modifying a shape carried out during previous steps of said printing.

4. The method of claim 1, further including a step of taking a series of digital images of said patient'"'"'s head, comprising images of at least the face and sides of said patient'"'"'s head and, before said step of printing, modifying said shape of said at least two different and separate portions of said selection of said style of eyeglass frame, based on a superposition of said selection of said style of eyeglass frame on said digital images.

5. The method of claim 4, wherein a three-dimensional version of said patient'"'"'s head is generated from said series of digital images, using said patient biometric data.

6. The method of claim 5, wherein said left and right arms of said selection of said style of eyeglass frame are generated by form-fitting two curves and combining said two curves, one of said curves sized using the shape and size of one of said left and right arms, and the second of said curves having the shape of one of said patient'"'"'s temples determined using said patient'"'"'s biometric data and said three-dimensional version of patient'"'"'s head.

7. The method of claim 1, wherein a single outline of at least one said lens is traced, and the dimensions of such lens are used to modify the shape of the selected eyeglass frame.

8. The method of claim 7, wherein said traced outline of said lens is used to limit modification to said style of eyeglass frame, such that when said modifying of a shape of at least two different and separate portions of said selection of said style of eyeglass frame, parts of said eyeglass which hold said lens, are held constant.

9. A method for custom designing or fitting 3D printed eyeglasses, said method comprising the steps of:

(a) conducting a patient eye examination and determining said patient'"'"'s optical specifications for vision correction, said optical specifications including at least two of said patient'"'"'s eye strength, refractive error, sphere, cylinder, axis, and prism;

(b) measuring biometric data of a head of said patient, including at least two of a distance between said patient'"'"'s pupils, frontal curvature of patient'"'"'s skull measured from temple to temple, the distance from a front of said patient'"'"'s temples to a back of said patient'"'"'s ear, and dimensions and shape of said patient'"'"'s eyes, nose and ears;

(c) choosing a preliminary lens outline based on said patient biometric data and said optical specifications, wherein said preliminary lens outline is digitally shaped in a preliminary eyeglass frame design to achieve a final lens design, said preliminary eyeglass frame design having at least a distinct thickness between a top of said frame and a lens opening, and a distinct lens opening width or height;

(d) generating one-half of a bridge portion of a preliminary eyeglass frame design and further generating a mirror image of said one-half of a nose bridge portion and a mirror image of said preliminary eyeglass frame design;

(e) modifying and final shaping of said preliminary eyeglass frame design using said final lens design, said nose bridge portion and said mirror images generated in step (d) to create a final frame design;

(f) molding a nose piece, using said patient biometric data and said final frame design; and

(g) printing said final frame design as modified, and said nose piece layer by layer, using a three-dimensional printer, after first modifying a color of at least a part of said final frame design and adding at least one design to said final frame design.

10. The method of claim 9, wherein said final frame design includes left and right arms, said left and right arms being generated using said patient biometric data.

11. The method of claim 10, further including a step of splitting said final frame design from said left and right arms, and using a liquid resin printer to print three-dimensional replicas of said final frame design and said left and right arms to scale.

12. The method of claim 9, further including a step of using said patient biometric data and said optical specifications to generate a second lens for assembly into said final frame design.

13. The method of claim 9, further including a step of modifying said final frame design to fit said patient'"'"'s frontal facial curvature.

14. The method of claim 9, further including a step of modifying a shape of hinges between left and/or right arms of said final design to match said printed final frame design.

15. A custom eyeglass design and fitting system, comprising:

a processor;

a device, which receives and electronically stores data, information and instructions;

that instructs said processor to perform acts for enabling the fabrication of a custom-fit or custom-designed eyeglass frame, using data and information retrievable from said device, said data and information including;

(i) patient eye examination data, wherein said patient eye examination data includes patient'"'"'s optical specifications for vision corrections, said optical specifications including at least two of said patient'"'"'s eye strength, refractive error, sphere, cylinder, axis, prism, and add;

(ii) patient biometric data, including at least two of a distance between said patient'"'"'s pupils, frontal curvature of said patient'"'"'s skull measured from temple to temple, distance from a front of said patient'"'"'s temples to a back of said patient'"'"'s ear, and dimensions and shape of said patient'"'"'s eyes, nose, eye sockets and ears; and

(iii) preliminary eyeglass frame size data, wherein a preliminary eyeglass frame design includes a frame portion defining two lens receiving openings, said frame portion further supporting left and right arms, the arms located on opposite distal ends of said frame portion, and wherein said preliminary eyeglass frame size data include lens opening width and height, bridge width, temple length and total width;

an input mechanism for transmitting said data and information to said processor, wherein said processor implements a fit analysis, using said preliminary eyeglass frame design size data, said patient biometric data and said optical specifications to alter said preliminary eyeglass frame design to generate a custom fit eyeglass frame for said patient; and

a three-dimensional printer functionally connected to said processor for printing said custom-fit eyeglass frame layer by layer.

16. The system of claim 15, wherein said processor executes instructions for generating an outline of a preliminary lens, using said patient biometric data and said optical specifications, wherein said processor further implements instructions that determine the vertical and outward shape of said outline of said preliminary lens in said preliminary eyeglass frame design.

17. The system of claim 15 wherein said processor executes instructions for generating (a) one-half of a bridge portion of said preliminary eyeglass frame design, (b) a mirror image of said one-half of a nose bridge portion, and (c) a mirror image of said preliminary eyeglass frame design, wherein said processor uses said patient biometric data, said optical specifications and said preliminary eyeglass frame size data to generate a final eyeglass frame design, a final lens design and a final nose bridge design.

18. The system of claim 17, wherein said processor uses said final eyeglass frame design and said patient biometric data to mold a nose piece for said final eyeglass frame design.

19. The system of claim 18, wherein said nose piece is printed layer by layer, using said three-dimensional printer, wherein said nose piece is assembled onto said final eyeglass frame design after printing.