CN114488566B - Face morphology three-dimensional data-based spectacle frame personalized design method - Google Patents
Face morphology three-dimensional data-based spectacle frame personalized design method Download PDFInfo
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- 238000013461 design Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000011521 glass Substances 0.000 claims abstract description 191
- 210000001508 eye Anatomy 0.000 claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 230000001815 facial effect Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 210000003128 head Anatomy 0.000 claims description 28
- 238000005452 bending Methods 0.000 claims description 21
- 210000001747 pupil Anatomy 0.000 claims description 17
- 238000004364 calculation method Methods 0.000 claims description 8
- 210000004709 eyebrow Anatomy 0.000 claims description 7
- 210000005252 bulbus oculi Anatomy 0.000 claims description 5
- 210000004744 fore-foot Anatomy 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 5
- 210000004872 soft tissue Anatomy 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract description 4
- 238000010146 3D printing Methods 0.000 abstract description 3
- 238000012938 design process Methods 0.000 abstract description 3
- 238000013178 mathematical model Methods 0.000 abstract description 3
- 210000001331 nose Anatomy 0.000 description 140
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
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- 208000029091 Refraction disease Diseases 0.000 description 1
- 206010040943 Skin Ulcer Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004430 ametropia Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
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- 210000002683 foot Anatomy 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C5/00—Constructions of non-optical parts
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C5/00—Constructions of non-optical parts
- G02C5/02—Bridges; Browbars; Intermediate bars
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- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Ophthalmology & Optometry (AREA)
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Abstract
The invention provides a personalized design method of an eyeglass frame based on three-dimensional data of facial morphology, which comprises the steps of firstly, carrying out manual facial measurement or three-dimensional scanning on a wearer, and establishing a geometric overall standard topological template of soft tissues around the frame eyeglass; further establishing a mathematical model capable of predicting static coincidence and dynamic stability of the optical axis of the frame glasses and the visual axis of the eyes; and finally, the accuracy of the design process is evaluated by using manual adjustment or personalized custom glasses of a 3D printing system. The method provided by the invention changes the customization of the glasses from subjective to objective to quantitative, and replaces manual with digital and automatic, so that the steps are simplified, the difficulty is reduced, and the finished glasses manufactured by the method are comfortable to wear and are not easy to slip.
Description
Technical Field
The invention relates to the technical field of glasses design, in particular to a method for individually designing glasses frames based on facial form three-dimensional data.
Background
About 10 hundred million patients in China correct ametropia by wearing the frame glasses, and static coincidence and dynamic stability of the optical axis of the frame glasses and the visual axis of eyes are important bases for evaluating the custom quality of the glasses. At present, the customization of the frame glasses (mainly the glasses frame) is manually adjusted after visual inspection, and is influenced by subjective factors such as experience, skill, operation stability and the like of the glasses customization operators, the cultivation process of the glasses customization operators is complex, the whole period of product manufacture is long, and the customization quality of the frame glasses is directly influenced.
Disclosure of Invention
The embodiment of the invention provides a personalized design method of a glasses frame (rack) based on facial form three-dimensional data, which is used for solving the problems of low manual adjustment efficiency and unstable quality in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
The personalized design method of the glasses frame based on the three-dimensional data of the facial morphology comprises the following steps:
s1, obtaining nose size data, binocular-nose position relation data, face shape data and head shape data through measurement, and obtaining glasses nose support design parameters through calculation based on the nose size data and the binocular-nose position relation data; the head morphology data includes head size data and ear morphology position data;
s2, obtaining glasses ring design parameters through calculation based on nose size data, binocular-nose position relation data and combined face morphology data;
s3, calculating to obtain glasses leg design parameters based on the ear form position data and combining with the glasses ring design parameters;
s4, calculating and obtaining the self-balancing design parameters of the glasses based on the nose pad design parameters, the rim design parameters and the leg design parameters of the glasses.
Preferably, in step S1, the nose size data includes a length of a hypotenuse of a nose and a width of a base of the nose, and the binocular-nose positional relationship data includes: the height of the nose at the level of the connecting line between the inner canthus of the eyes and the width of the nose at the level of the connecting line between the inner canthus of the eyes; or, the height of the nose at the preset binocular connecting line level and the width of the nose at the preset binocular connecting line level;
based on the size data of the nose and the two-eye-nose position relation data, obtaining the design parameters of the nose pad of the glasses through calculation comprises the following steps:
s11, establishing a first coordinate system in the area of the nose;
s12, based on the position parameters of the connecting lines of inner canthus of the eyes in the first coordinate system, combining the midpoint parameters of the nose pad obtained through the preset size parameters of the nose pad to obtain the position parameters of the nose pad in the Y axis in the first coordinate system;
s13, respectively obtaining the position parameters of the nose support on the X axis and the Z axis in the first coordinate system based on the position parameters of the midpoint of the connecting line of the nose ridge and the nose root in the first coordinate system;
s14, acquiring position parameters of the nose pad relative to the nose based on the position parameters of the nose pad on the X axis, the Y axis and the Z axis in the first coordinate system;
s15 through type
cos (antecedent) =2. Length of hypotenuse of nose/width of base of nose (1)
Calculating to obtain nose pad forefoot parameters;
s16 through type
cos (opening angle) =2×height of nose at the level of the connecting line of inner canthus of both eyes/width of nose at the level of the connecting line of inner canthus of both eyes
(2)
And calculating to obtain the nose pad opening angle parameters.
Preferably, step S2 includes:
s21, establishing a second coordinate system in the region of the orbit;
s22, setting position parameters of the rim of the glasses on the basis of the relative positions of the eyebrows in the second coordinate system;
s23, setting a forward inclination angle parameter and a height parameter of the glasses ring based on the position parameter of the upper edge of the glasses ring;
s24, calculating and obtaining a glasses rim pupil height parameter based on the glasses rim height parameter;
s25, acquiring a lens optical center based on the eyeball rotation center and the curvature center of the eyeglass lens by combining the forward inclination angle parameters of the eyeglass ring;
s26, calculating and obtaining position parameters of the lower edge of the glasses ring based on the pupil height parameters of the glasses ring;
s27, obtaining the width of the glasses ring based on the position parameters of the upper edge of the glasses ring and the position parameters of the lower edge of the glasses ring, and passing through the glasses ring
Glasses rim width + nose bridge width = interpupillary distance (3)
Calculating to obtain the width of the nose bridge of the glasses;
s28, setting the distance between the glasses ring and eyes based on the front dip angle parameter of the glasses ring and the optical center of the lenses.
Preferably, step S2 further comprises: setting a nose support vertical angle parameter based on the forward inclination angle parameter of the glasses ring; the absolute value of the vertical angle parameter of the nose pad is the same as the forward inclination angle parameter of the glasses ring, and the direction of the vertical angle parameter of the nose pad is opposite to the forward inclination angle parameter of the glasses ring.
Preferably, the position parameters of the rim of the spectacles in substep S22 include: the difference between the height of the upper edge part of the glasses ring and the height of the lower edge of the eyebrow part is not more than 1mm;
the substep S25 further includes: if the optical center of the lens moves down 1mm from the pupil, the front tilt angle of the eyeglass ring is changed to 2 degrees.
Preferably, step S3 includes:
s31, calculating to obtain bending point design parameters of the glasses legs based on the ear form position data and combining the head width data;
s32 through type
Glasses rim width + nose bridge width + pile head position = face width (4)
Calculating to obtain design parameters of the pile heads of the glasses;
s33, calculating and obtaining the design parameters of the glasses legs before bending and the design parameters of the glasses legs after bending based on the design parameters of the bending points of the glasses legs and the design parameters of the piles of the glasses in combination with the design parameters of the glasses rings.
Preferably, step S4 includes:
s41, constructing virtual glasses based on the glasses nose support design parameters, the glasses ring design parameters and the glasses leg design parameters and combining the lens parameters, so that the legs of the virtual glasses are in a horizontal state;
s42, calculating mechanical balance conditions on two sides of a nose pad by taking the nose pad as an axis, and adjusting one or more of a nose pad design parameter, a glasses ring design parameter and glasses leg design parameter of the glasses according to the mechanical balance conditions on two sides of the nose pad, so that the force multiplication arm of the nose pad towards one side of the nose is larger than the force multiplication arm of the nose pad towards one side of the nose;
s43, calculating mechanical balance conditions on two sides of the nose pad by taking the other nose pad as an axis, and adjusting one or more of the nose pad design parameters, the glasses ring design parameters and the glasses leg design parameters of the glasses according to the mechanical balance conditions on two sides of the nose pad, so that the force multiplication moment arm of the nose pad towards one side of the nose is larger than the force multiplication moment arm of the nose pad towards one side of the back of the nose.
According to the technical scheme provided by the embodiment of the invention, the personalized design method of the glasses frame based on the facial form three-dimensional data comprises the steps of firstly, carrying out facial manual measurement or three-dimensional scanning on a wearer, and establishing a soft tissue geometric overall form standard topological template around the frame glasses; further establishing a mathematical model capable of predicting static coincidence and dynamic stability of the optical axis of the frame glasses and the visual axis of the eyes; and finally, the accuracy of the design process is evaluated by using manual adjustment or personalized custom glasses of a 3D printing system. The method provided by the invention changes the customization of the glasses from subjective to objective and quantitative, replaces manual with standardization, digitalization and automation, simplifies the steps, reduces the difficulty, and the finished glasses manufactured by the method are comfortable to wear and are not easy to slip.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process flow diagram of a method for personalized design of an eyeglass frame based on facial form three-dimensional data provided by the present invention;
fig. 2 is a schematic diagram of the nose pad design gist of the method for personalized design of an eyeglass frame based on three-dimensional data of facial morphology according to the present invention;
FIG. 3 is a schematic view of the design gist of an optical center of a glasses frame according to the method for personalized design of a glasses frame based on three-dimensional data of facial morphology;
fig. 4 is a schematic diagram of the self-balancing design gist of the glasses according to the method for personalized design of glasses frames based on three-dimensional data of facial morphology.
In the figure:
201. medial canthus wire 202, nose pad 301, lens optic center 302, eyeball center of rotation 303, lens anterior center of curvature 304, lens posterior center of curvature 305, lens and rim central axis 401, head 402, triangular support 403, and frame.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the purpose of facilitating an understanding of the embodiments of the invention, reference will now be made to the drawings of several specific embodiments illustrated in the drawings and in no way should be taken to limit the embodiments of the invention.
Referring to fig. 1, the invention provides a method for individually designing an eyeglass frame based on facial morphology three-dimensional data, which comprises the following steps:
s1, obtaining nose size data, binocular-nose position relation data, face shape data and head shape data through measurement, and obtaining glasses nose support design parameters through calculation based on the nose size data and the binocular-nose position relation data; the head morphology data includes head size data and ear morphology position data; the process is preferably carried out by scanning and measuring by a special instrument, and the obtained data is directly input into computer software for aided design;
s2, obtaining glasses ring design parameters through calculation based on nose size data, binocular-nose position relation data and combined face morphology data;
s3, calculating to obtain glasses leg design parameters based on the ear form position data and combining with the glasses ring design parameters;
s4, calculating and obtaining the self-balancing design parameters of the glasses based on the nose pad design parameters, the rim design parameters and the leg design parameters of the glasses.
The self-balancing design parameters of the glasses are used for adjusting the nose pad design parameters of the glasses, the ring design parameters of the glasses and the leg design parameters of the glasses, and the finished products of the glasses are manufactured according to the adjusted design parameters of all parts. In the preferred embodiment provided by the invention, each flow is executed through auxiliary design software, the customization of the glasses is changed from subjective quantification to objective quantification, and the standardized, digitized and automatic glasses replace manual operation, so that the steps are simplified, the customization difficulty is reduced, and the finished glasses manufactured according to the method are comfortable to wear and are not easy to slip.
In the preferred embodiment provided by the invention, the basic flow of the design method is as follows: the self-balancing method comprises the steps of determining the position of a nose support, determining the position of the upper edge of a glasses rim, determining the front inclination angle of the rim, determining the pupil height, determining the optical center of a lens, determining the lower edge of the glasses rim, determining the inner and outer edges of the rim and the bridge of the glasses nose, determining the bending point of a glasses leg, determining the pile head of the glasses, determining the front glasses leg of the bending point of the glasses leg, determining the bending point of the glasses leg and the back glasses leg, and calculating a weight scheme when the gravity center passes through the eyeball rotation center, so that self-balancing is realized.
Wherein the nose size data includes a length of a hypotenuse of the nose and a width of a base of the nose, and the binocular-nose positional relationship data includes: the height of the nose at (at) the level of the inner canthus line of the eyes and the width of the nose at (at) the level of the inner canthus line of the eyes; alternatively, the height of the nose at the preset binocular connecting line level and the width of the nose at the preset binocular connecting line level. The latter is mainly aimed at: the distance between the nose and the eyes of the special face is far, and an independent customization mode is adopted; the other is a custom action that is based entirely on the intent of the wearer.
The design part of the nose pad specifically needs to meet the following points:
as shown in fig. 2, the position on the Y-axis: the midpoint of the nose pad 202 is located on the medial canthus line 201 of the eyes.
Position on the X-axis: the midpoint of the line connecting the nasal ridge and the nasal root.
Position on the Z axis: the midpoint of the line connecting the nasal ridge and the nasal root.
Front angle: consistent with the anterior angle of the nose.
Opening angle: consistent with the opening angle of the nose.
Vertical angle: the front inclination angle of the mirror ring is consistent with that of the mirror ring, and the rotation direction is opposite, so that the nose support can be vertical to the ground after the mirror ring is inclined forwards, and the maximum friction force is ensured.
The upper, middle and lower parts of the nose pad are required to be attached to the nose, otherwise, local indentation is caused.
The gap between each part of the nose pad and the nose is not more than 1mm.
For example, in some preferred embodiments, the design is made using the following procedure:
s11, establishing a first coordinate system (which can be constructed by modeling software) in the area of the nose;
s12, based on the position parameters of the inner canthus connecting lines of the eyes in the first coordinate system, combining the midpoint parameters of the nose pad obtained through the preset size parameters of the nose pad to obtain the position parameters of the nose pad in the Y axis in the first coordinate system;
s13, respectively obtaining the position parameters of the nose support on the X axis and the Z axis in the first coordinate system based on the position parameters of the midpoint of the connecting line of the nose ridge and the nose root in the first coordinate system;
s14, acquiring position parameters of the nose pad relative to the nose based on the position parameters of the nose pad on the X axis, the Y axis and the Z axis in the first coordinate system;
s15 through type
cos (antecedent) =2. Length of hypotenuse of nose/width of base of nose (1)
Calculating to obtain nose pad forefoot parameters;
s16 through type
cos (opening angle) =2×height of nose at the level of the connecting line of inner canthus of both eyes/width of nose at the level of the connecting line of inner canthus of both eyes
(2)
And calculating to obtain the nose pad opening angle parameters.
The design key points of the mirror ring part are as follows:
the front angle of the contact part of the glasses ring without the nose supporting arm and the nose is consistent with the front angle of the nose.
The distance between the glasses ring with the nose pad and the nose pad is 1-2mm.
Position of the rim on the Y-axis: the upper edge of the lens ring does not exceed the lower edge of the eyebrow by 1mm, the horizontal midline of the lens ring passes through the optical center of the lens, and the optical center of the lens is positioned at the front inclination angle of 2mm below the pupil.
Position of the rim on the X-axis: the rim vertical midline passes through the optical center, rim width + nose bridge = pupil distance.
Position of the rim on the Z axis: ensuring that the lens does not contact the lashes, typically ensuring that the inner surface of the lens is 14mm from the lens. The smaller the distance is, the more stable the glasses are worn after the gravity center of the glasses is deviated; the lens is more significantly magnified or demagnified away from the eye. And recording the eye distance by utilizing the scales on the test wearing frame, evaluating whether the eye distance is proper, determining the value of the eye distance on the frame order, and converting the optometry prescription.
Mirror ring + nose bridge + pile head = face width
Pretilt angle: for ensuring beautiful appearance (avoiding shielding eyebrows) and wide visual field of common eye position, the parameters can be set properly according to the position parameters of the rim. For example, as the conventional ocular optical center needs to be moved down 1mm from the pupil, the rim needs to be tilted forward 2 degrees.
The lens with the effective diameter close to the eye size is used as far as possible from the viewpoint of weight reduction, the difference is not more than 2mm, and the difference between the horizontal size and the vertical size of the lens frame is not more than 9mm.
Nose bridge: the high and narrow noses use high and thin noses, the low and wide noses use low and thick noses, and the proper noses can not touch the skin of the face by the noses and the mirror rims. The width of the nose bridge can be used as a tool for achieving the consistency of the interpupillary distance of the glasses and the interpupillary distance of the eyes.
When the pupil distance of the glasses is inconsistent with the pupil distance of the glasses frame, the bridge of the nose needs to be bent to make the pupil distance and the pupil distance consistent. The personalized processing of the lens can reduce the difficulty of realizing the condition and avoid the prism effect caused by eccentric assembly of the centrosymmetric lens. It should be understood that in the embodiments provided herein, the parameters of the optical center of the lens are merely intermediate data for the frame design.
Based on the design points described above, in some preferred embodiments, the design of the rim includes the following process
S21, establishing a second coordinate system in the region of the orbit;
s22, setting position parameters of the rim of the glasses on the basis of the relative positions of the eyebrows in the second coordinate system;
s23, setting a forward inclination angle parameter and a height parameter of the glasses ring (namely, a position parameter of the glasses ring on a Y axis in a second coordinate system) based on a position parameter of the upper edge of the glasses ring;
s24, calculating and obtaining a glasses rim pupil height parameter based on the glasses rim height parameter;
s25, acquiring a lens optical center based on the eyeball rotation center and the curvature center of the eyeglass lens by combining the forward inclination angle parameters of the eyeglass ring; for example, as shown in fig. 3, the center of rotation 302 of the eye is located on the central axis 305 of the lens and the rim, on which the center of curvature 303 on the front side of the lens and the center of curvature 304 on the rear side of the lens are obtained, and the lens optical center 301 is located in front of the lens in combination with the front tilt parameters of the rim of the glasses;
s26, calculating and obtaining position parameters of the lower edge of the glasses ring based on the pupil height parameters of the glasses ring;
s27, obtaining the width of the glasses rim (namely the position parameter of the X axis of the rim in the second coordinate system) based on the position parameter of the upper edge of the glasses rim and the position parameter of the lower edge of the glasses rim, and then passing through
Glasses rim width + nose bridge width = interpupillary distance (3)
Calculating to obtain the width of the nose bridge of the glasses;
s28, setting the distance between the glasses lens and the eyes (namely the position parameter of the glasses lens on the Z axis in the second coordinate system) based on the front dip angle parameter of the glasses lens and the optical center of the lenses.
In substep S24, the glasses rim pupil height parameter may be represented by the formula: lens mount height 0.618=ph, or formula: (frame height-34)/2+22=ph.
In a preferred embodiment, the process of designing the rim parameters further comprises: setting a nose support vertical angle parameter based on the forward inclination angle parameter of the glasses ring; the absolute value of the vertical angle parameter of the nose pad is the same as the forward inclination angle parameter of the glasses ring, and the direction of the vertical angle parameter of the nose pad is opposite to the forward inclination angle parameter of the glasses ring. The nose pad can still be vertical to the ground after the mirror ring is tilted forwards, so that the maximum friction force is ensured.
The design key points of the glasses leg part are as follows:
the temples are the connecting lines of the pile heads (namely the parts connecting the temples and the hinges) and the bending points of the temples, and are only contacted with the face at the bending points of the temples, and the upper parts of the earroots are the only pressing points. If the head in front of the auricle is wider, the arc design is needed to bypass the wider part, only the auricle is pressed, and then the soft tissue of the head adopts a disc brake type fixed foot rest.
The problem that the mirror ring is not horizontal caused by different heights of the left ear and the right ear is compensated by adjusting the angle from the pile head to the bending point.
The contact part of the bending point of the glasses leg should avoid the most sensitive part of the top end behind the ear, and the shape behind the ear needs to be scanned in an enhanced way.
In some preferred embodiments, it may be designed using the following steps:
s31, calculating to obtain bending point design parameters of the glasses legs based on the ear form position data and combining the head width data;
s32 through type
Glasses rim width + nose bridge width + pile head position = face width (4)
Calculating to obtain design parameters of the pile heads of the glasses;
s33, calculating and obtaining the design parameters of the glasses legs before bending and the design parameters of the glasses legs after bending based on the design parameters of the bending points of the glasses legs and the design parameters of the piles of the glasses in combination with the design parameters of the glasses rings.
According to the design method provided by the invention, a triangle stable support-four-point contact friction design method is adopted, as shown in fig. 4, a head 401 of a human body is a central circular object, the elliptical shapes at two sides of the head 401 are ears, a nose and earroots at the left side and the right side form a triangle support 402, and two nose pads and two glasses leg bending points of a glasses frame 403 form four-point contact with skin. The best way to keep the spectacles stable is not pressure but friction, rather increasing the area of four point contacts rather than increasing pressure at a single point of contact.
Based on the above conditions, the process of calculating the weighting scheme when the center of gravity passes through the center of rotation of the eyeball (i.e., step S4 described above) includes:
s41, constructing virtual glasses based on the glasses nose support design parameters, the glasses ring design parameters and the glasses leg design parameters and combining the lens parameters, so that the legs of the virtual glasses are in a horizontal state;
s42, calculating mechanical balance conditions on two sides of a nose pad by taking the nose pad as an axis, and adjusting one or more of a nose pad design parameter, a glasses ring design parameter and glasses leg design parameter of the glasses according to the mechanical balance conditions on two sides of the nose pad, so that the force multiplication arm of the nose pad towards one side of the nose is larger than the force multiplication arm of the nose pad towards one side of the nose;
s43, calculating mechanical balance conditions on two sides of the nose pad by taking the other nose pad as an axis, and adjusting one or more of the nose pad design parameters, the glasses ring design parameters and the glasses leg design parameters of the glasses according to the mechanical balance conditions on two sides of the nose pad, so that the force multiplication moment arm of the nose pad towards one side of the nose is larger than the force multiplication moment arm of the nose pad towards one side of the back of the nose.
In other preferred embodiments, there are also conditions for adjustments to be made to the needs of a particular population:
the height level lens requires matching of the temple to a high fit to the behind-the-ear contour, for example by using a flexible material in the area of the bending point.
Child eyeglass frames: mainly aiming at the requirement of the firmness of the whole structure, for example, lenses must be firmly fixed in a lens frame, and specially designed deepened lens frame grooves and lens edging are carried out; the pile head (end faces) can adopt a spring and damping buffer design; PC impact resistant lenses; the bridge of the lower half of the nose pad requires special reinforcement to provide adequate support.
Glasses for the elderly: the fitting degree and the contact area of the nose pad and the skin are improved, so that skin ulcers caused by overhigh local pressure are avoided.
In summary, according to the method for individually designing the glasses frame based on the facial morphology three-dimensional data, firstly, the face of a wearer is manually measured or scanned in three dimensions, and a soft tissue geometric overall form standard topological template around the frame glasses is established; further establishing a mathematical model capable of predicting static coincidence and dynamic stability of the optical axis of the frame glasses and the visual axis of the eyes; and finally, the accuracy of the design process is evaluated by using manual adjustment or personalized custom glasses of a 3D printing system. The invention changes the customization of glasses from subjective to objective quantification, replaces manual with standardization, digitalization and automation, simplifies steps, reduces difficulty, and the finished glasses manufactured by the method are comfortable to wear and are not easy to slip.
Those of ordinary skill in the art will appreciate that: the drawing is a schematic diagram of one embodiment and the modules or flows in the drawing are not necessarily required to practice the invention.
From the above description of embodiments, it will be apparent to those skilled in the art that the present invention may be implemented in software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments or some parts of the embodiments of the present invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, with reference to the description of method embodiments in part. The apparatus and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (5)
1. The method for individually designing the glasses frame based on the three-dimensional data of the facial morphology is characterized by comprising the following steps:
s1, obtaining nose size data, binocular-nose position relation data, face shape data and head shape data through measurement, and obtaining glasses nose support design parameters through calculation based on the nose size data and the binocular-nose position relation data; the head morphology data includes head size data and ear morphology position data;
the nose size data includes a length of a hypotenuse of a nose and a width of a base of the nose, and the binocular-nose positional relationship data includes: the height of the nose at the level of the connecting line between the inner canthus of the eyes and the width of the nose at the level of the connecting line between the inner canthus of the eyes; or, the height of the nose at the preset binocular connecting line level and the width of the nose at the preset binocular connecting line level;
the method for obtaining the design parameters of the nose pad of the glasses through calculation based on the size data of the nose and the position relation data of the eyes and the nose comprises the following steps:
s11, establishing a first coordinate system in the area of the nose;
s12, based on the position parameters of the connecting lines of inner canthus of the eyes in the first coordinate system, combining the midpoint parameters of the nose pad obtained through the preset size parameters of the nose pad to obtain the position parameters of the nose pad in the Y axis in the first coordinate system;
s13, respectively obtaining the position parameters of the nose support on the X axis and the Z axis in the first coordinate system based on the position parameters of the midpoint of the connecting line of the nose ridge and the nose root in the first coordinate system;
s14, acquiring position parameters of the nose pad relative to the nose based on the position parameters of the nose pad on the X axis, the Y axis and the Z axis in the first coordinate system;
s15 through type
cos (antecedent) =2. Length of hypotenuse of nose/width of base of nose (1)
Calculating to obtain nose pad forefoot parameters;
s16 through type
cos (opening angle) =2. Height of nose at the level of the connecting line of inner canthus of both eyes/width of nose at the level of the connecting line of inner canthus of both eyes (2)
Calculating to obtain nose pad opening angle parameters;
s2, obtaining glasses ring design parameters through calculation based on nose size data, binocular-nose position relation data and combined face morphology data;
s3, calculating to obtain glasses leg design parameters based on the ear form position data and combining with the glasses ring design parameters;
s4, calculating to obtain self-balancing design parameters of the glasses based on the nose support design parameters, the rim design parameters and the leg design parameters of the glasses; the method specifically comprises the following steps:
s41, constructing virtual glasses based on the glasses nose support design parameters, the glasses ring design parameters and the glasses leg design parameters and combining the lens parameters, so that the legs of the virtual glasses are in a horizontal state;
s42, calculating mechanical balance conditions on two sides of the nose support by taking the nose support as an axis, and adjusting one or more of nose support design parameters, glasses ring design parameters and glasses leg design parameters of the glasses according to the mechanical balance conditions on two sides of the nose support, so that the force multiplication moment arm of the nose support on one side of the nose support facing the nose is larger than the force multiplication moment arm of the nose support on one side of the nose support facing away from the nose;
s43, calculating mechanical balance conditions on two sides of the other nose support by taking the other nose support as an axis, and adjusting one or more of the nose support design parameters, the glasses ring design parameters and the glasses leg design parameters of the glasses according to the mechanical balance conditions on two sides of the other nose support, so that the force multiplication moment arm of the other nose support towards one side of the nose is larger than the force multiplication moment arm of the other nose support towards one side of the nose.
2. The method according to claim 1, wherein step S2 comprises:
s21, establishing a second coordinate system in the region of the orbit;
s22, setting position parameters of the rim of the glasses on the basis of the relative positions of the eyebrows in the second coordinate system;
s23, setting a forward inclination angle parameter and a height parameter of the glasses ring based on the position parameter of the upper edge of the glasses ring;
s24, calculating and obtaining a glasses rim pupil height parameter based on the glasses rim height parameter;
s25, acquiring a lens optical center based on the eyeball rotation center and the curvature center of the eyeglass lens by combining the forward inclination angle parameters of the eyeglass ring;
s26, calculating and obtaining position parameters of the lower edge of the glasses ring based on the pupil height parameters of the glasses ring;
s27, obtaining the width of the glasses ring based on the position parameter of the upper edge of the glasses ring and the position parameter of the lower edge of the glasses ring,
through type
Glasses rim width + nose bridge width = interpupillary distance (3)
Calculating to obtain the width of the nose bridge of the glasses;
s28, setting the distance between the glasses ring and eyes based on the front dip angle parameter of the glasses ring and the optical center of the lenses.
3. The method according to claim 2, wherein step S2 further comprises: setting a nose support vertical angle parameter based on the forward inclination angle parameter of the glasses ring; the absolute value of the vertical angle parameter of the nose pad is the same as the forward inclination angle parameter of the glasses ring, and the direction of the vertical angle parameter of the nose pad is opposite to the forward inclination angle parameter of the glasses ring.
4. The method according to claim 2, wherein the position parameters of the rim of the spectacles in substep S22 comprise: the difference between the height of the upper edge part of the glasses ring and the height of the lower edge of the eyebrow part is not more than 1mm;
the substep S25 further includes: if the optical center of the lens moves down 1mm from the pupil, the front tilt angle of the eyeglass ring is changed to 2 degrees.
5. The method according to claim 2, wherein step S3 comprises:
s31, calculating to obtain bending point design parameters of the glasses legs based on the ear form position data and combining the head width data;
s32 through type
Glasses rim width + nose bridge width + pile head position = face width (4)
Calculating to obtain design parameters of the pile heads of the glasses;
s33, calculating and obtaining the design parameters of the glasses legs before bending and the design parameters of the glasses legs after bending based on the design parameters of the bending points of the glasses legs and the design parameters of the piles of the glasses in combination with the design parameters of the glasses rings.
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| AT525346B1 (en) * | 2022-07-07 | 2023-03-15 | Genera Printer Gmbh | Additive manufacturing process |
| CN116482874B (en) * | 2023-03-03 | 2025-04-22 | 爱尔眼科医院集团四川眼科医院有限公司 | Glasses frame design method based on face multi-point measurement data |
| CN116305364A (en) * | 2023-03-31 | 2023-06-23 | 珠海赛纳视博科技有限公司 | A kind of glasses model generation method and electronic equipment |
| CN117077479B (en) * | 2023-08-17 | 2024-02-13 | 北京斑头雁智能科技有限公司 | Ergonomic eyeglass design and manufacturing method and Ergonomic eyeglass |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015101737A1 (en) * | 2014-01-02 | 2015-07-09 | Essilor International (Compagnie Generale D'optique) | Method for determining at least one geometric parameter of a customized glasses frame, and related method for determining the customized frame |
| CN105264426A (en) * | 2013-06-07 | 2016-01-20 | 埃西勒国际通用光学公司 | Methods for Determining Optical Devices |
| CN105637512A (en) * | 2013-08-22 | 2016-06-01 | 贝斯普客公司 | Method and system for creating custom products |
| EP3029511A1 (en) * | 2014-12-04 | 2016-06-08 | Welsky Technologies Limited | Multiple-reference based system and method for ordering eyeglasses |
| CN105992966A (en) * | 2014-01-02 | 2016-10-05 | 埃西勒国际通用光学公司 | Method for fitting an actual predetermined glasses frame for the use thereof by a given wearer |
| CN107085864A (en) * | 2017-06-01 | 2017-08-22 | 北京大学第三医院 | Feature point-based glasses modeling device and method, glasses manufacturing method, and glasses |
| CN107678176A (en) * | 2017-11-03 | 2018-02-09 | 谢文超 | A kind of single temple spectacle frame |
| CN108490641A (en) * | 2018-02-14 | 2018-09-04 | 天目爱视（北京）科技有限公司 | Glasses automated design system based on 3D header datas |
| KR20190024861A (en) * | 2018-10-25 | 2019-03-08 | 김지환 | Method for Providing Glasses Fitting Service by using Augmented Reality |
| CN109460635A (en) * | 2018-12-29 | 2019-03-12 | 陈星原 | For generating the method and system of mirror holder |
| CN210465881U (en) * | 2019-10-29 | 2020-05-05 | 青岛大学 | A nose pad self-balancing spectacle frame |
| CN112674710A (en) * | 2021-01-04 | 2021-04-20 | 首都医科大学附属北京同仁医院 | Digital high-precision glasses manufacturing and producing device and method |
| CN114019700A (en) * | 2021-10-27 | 2022-02-08 | 首都医科大学附属北京同仁医院 | A method for obtaining parameters of a frame glasses try-on frame and frame glasses support parts |
-
2022
- 2022-02-15 CN CN202210139054.0A patent/CN114488566B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264426A (en) * | 2013-06-07 | 2016-01-20 | 埃西勒国际通用光学公司 | Methods for Determining Optical Devices |
| CN105637512A (en) * | 2013-08-22 | 2016-06-01 | 贝斯普客公司 | Method and system for creating custom products |
| WO2015101737A1 (en) * | 2014-01-02 | 2015-07-09 | Essilor International (Compagnie Generale D'optique) | Method for determining at least one geometric parameter of a customized glasses frame, and related method for determining the customized frame |
| CN105992966A (en) * | 2014-01-02 | 2016-10-05 | 埃西勒国际通用光学公司 | Method for fitting an actual predetermined glasses frame for the use thereof by a given wearer |
| EP3029511A1 (en) * | 2014-12-04 | 2016-06-08 | Welsky Technologies Limited | Multiple-reference based system and method for ordering eyeglasses |
| CN105678391A (en) * | 2014-12-04 | 2016-06-15 | 颖天科技有限公司 | Multiple reference based system and method for ordering eyeglasses |
| CN107085864A (en) * | 2017-06-01 | 2017-08-22 | 北京大学第三医院 | Feature point-based glasses modeling device and method, glasses manufacturing method, and glasses |
| CN107678176A (en) * | 2017-11-03 | 2018-02-09 | 谢文超 | A kind of single temple spectacle frame |
| CN108490641A (en) * | 2018-02-14 | 2018-09-04 | 天目爱视（北京）科技有限公司 | Glasses automated design system based on 3D header datas |
| KR20190024861A (en) * | 2018-10-25 | 2019-03-08 | 김지환 | Method for Providing Glasses Fitting Service by using Augmented Reality |
| CN109460635A (en) * | 2018-12-29 | 2019-03-12 | 陈星原 | For generating the method and system of mirror holder |
| CN210465881U (en) * | 2019-10-29 | 2020-05-05 | 青岛大学 | A nose pad self-balancing spectacle frame |
| CN112674710A (en) * | 2021-01-04 | 2021-04-20 | 首都医科大学附属北京同仁医院 | Digital high-precision glasses manufacturing and producing device and method |
| CN114019700A (en) * | 2021-10-27 | 2022-02-08 | 首都医科大学附属北京同仁医院 | A method for obtaining parameters of a frame glasses try-on frame and frame glasses support parts |
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