How a foot 3D scanner uses laser to measure the 3D shape of the foot

You may never really "see" your feet clearly.

They have accompanied you through thousands of mountains and rivers, but are often ignored. Do you know how high your arch is? Are the two feet really the same? Does your big toe tend to turn outward? These details are difficult to judge with the naked eye, but technology can.

The protagonist to be introduced today is the black technology that is specially designed for "portraits" of feet - the foot shape 3D scanner.

It uses a beam of laser to "digitize" your feet and accurately present every detail. How is it done? Let's reveal it.

1 How does the laser "see" the feet?

The core technology of the foot shape 3D scanner is laser 3D scanning. It sounds profound, but the principle is actually very scientific.

When the scanner is working, it will project a set of regular laser lines or dot arrays onto the foot. When these light rays are irradiated onto the surface of the foot, they will deform when they encounter different heights and curves.

The built-in optical camera will accurately capture the deformation state of these light rays, and calculate the three-dimensional coordinates of each light point in space through triangulation. In other words, the "shape" of the foot is recorded one by one in the form of digital point cloud.

Finally, the system uses algorithm processing to stitch these data into a complete, three-dimensional foot model - from toes to arches, from instep to heels, without any error.

2. "Foot shape ID card" more accurate than size

Laser 3D scanning is not just about foot length and width, but a comprehensive analysis of the three-dimensional structure of the foot. The following key indicators can be accurately measured by the scanner:

Foot length, foot width, foot height

Arch height, phalangeal arrangement

Forefoot heel ratio, left and right foot symmetry

Hallux valgus angle, instep and valgus trend

Contour of the ground, degree of instep bulge

These data not only help us better understand our feet, but also serve as the basis for the design of customized insoles, corrective shoes, functional shoes and other products.

3. Application scenarios are more than just a pair of shoes

Insole customization

Foot shape 3D scanning is the first step in the production of personalized insoles. Flat feet, high arches, inversion and other problems can all be designed with scientifically matched support structures through scanning data to improve comfort and functionality.

Foot disease prevention and rehabilitation

Laser scanning makes foot structure problems "untraceable", providing a scientific basis for foot disease prevention and rehabilitation program formulation. Diabetic foot and high-risk foot structure can be identified and intervened in advance.

Children's foot shape development monitoring

During the growth stage of children, foot shape changes significantly. Regular 3D scanning can monitor arch development and bone development deviations, and prevent bad gait or deformation at an early stage.

Digital shoe last design and industrial production

Three-dimensional foot shape data can also be directly used for shoe last design, helping brands to achieve digital shoemaking and intelligent matching, and provide support for flexible production.