An automatic design method of a personalized flexible nose pad

Abstract

The invention discloses an automatic design method for a personalized flexible nose pad, and the method comprises the steps of (1) obtaining a model of a nose region in a human face, and obtaining a point cloud set of the region; (2) selecting a bracket standard model of the flexible nose pad, and dividing the model into a rigid nose pad seat part, a nose pad seat surface part, a deformable part and a base part; (3) sampling the surface of the nose pad, and mapping sampling points into a local coordinate system established by the surface part of the nose pad; (4) selecting a spectacle frame model, and initializing a bracket position; (5) according to the point cloud set of the nose area, the position of the bracket and the mapping relation, moving the stipule sampling points to the surfaceof the nose closest to the point one by one by using an iterative approach method, and updating the bracket grid; after iteration is completed, combining the bracket standard model and the spectacleframe standard model, thereby completing the design of the flexible nose pad. The flexible nose pad is automatically optimized according to the shape of the nose of a user, is high in fitting degree with the nose, and adapts to the asymmetry of the face.

Description

technical field [0001] The invention belongs to the technical field of glasses design and production, and in particular relates to an automatic design method of a personalized flexible nose pad based on three-dimensional measurement of a human face. Background technique [0002] The nose pad is a supporting part of the spectacle frame on the bridge of the nose, which has a very important impact on the wearing comfort and aesthetics of the glasses. Divided from the adjustable degree, the nose pad design mode of existing spectacles can be divided into three kinds of fixed universal design, adjustable design and individualized custom design. [0003] The fixed universal design is mainly used for non-metal spectacle frames. It is designed to determine a set of fixed shapes and parameters based on the typical nose bridge data of the target population, which is the so-called "version type". The fixed universal nose pad design cannot provide adjustment. Possibility, the user shoul...

AI Technical Summary

Problems solved by technology

The problem with this kind of personalized custom design based on 3D printing is that the 3D printing material used for the mirror frame needs a certain degree of hardness, because the frame model cannot pass through the mold and can only be produced with 3D printing at an acceptable cost. At present, the 3D printing technology of mixed materials is still immature, so the nose pads and the frame are made of hard materials, which affects the wearing comfort

Traditional glasses use silicone pads to improve wearing comfort. However, the thickness of the silicone pads will affect the fit of the nose pads, and because the shape of the personalized customized nose pads is not fixed, this also brings difficulties to the design of the silicone pads. great difficulty

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