Measure hair strands

How to measure the diameter of materials as thin as hair strands? The most commonly used method is diffraction, which utilizes the diffraction phenomenon of light for measurement. Laser diffraction method is suitable for measuring the filament diameter of opaque materials below 0.2mm, with a resolution of up to 0.2 μ m and a measurement accuracy of up to 0.1 μ m.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Diffraction is a method of measuring the size of small objects based on the wave characteristics and diffraction phenomena of light. 1. Diffraction of light: When light waves encounter obstacles or pass through small holes, diffraction phenomena occur, that is, light waves will bypass obstacles or pass through small holes and continue to propagate, forming specific diffraction patterns in space. 2. Diffraction pattern of hair strands: Place the hair strands in the optical path as obstacles, and when parallel light waves pass through the hair strands, a diffraction pattern will be formed behind the hair strands. This pattern contains information on the size of hair strands. 3. Pattern analysis and measurement: By observing and analyzing diffraction patterns, the distance or angle between specific stripes in the pattern can be measured. Then, using the diffraction theory of light and mathematical formulas, the diameter of hair strands can be calculated. This method typically requires precise optical instruments and complex computational processes.