Micro-range measurement method based on Fraunhofer diffraction
A Fraunhofer and measurement method technology, applied in the direction of measuring devices, image data processing, instruments, etc., can solve the problems that cannot be solved, the calculation of source light intensity is extremely demanding, consumes a lot of time and computer computing power, and achieves Computationally efficient effects
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[0044] An embodiment of the present invention provides a macro-distance measurement method based on Fraunhofer diffraction. In this method, a Fraunhofer diffraction image acquisition device collects a diffraction image, and then measures the impact of the light wave itself on a tiny obstacle or small The diffraction phenomenon generated by the hole is inversely calculated to obtain the size of the obstacle or small hole.
[0045] Fraunhofer diffraction occurs when light waves encounter obstacles or slits close to their wavelengths, forming a specific diffraction pattern. Based on the Fraunhofer diffraction formula, the size of obstacles or slits can also be deduced from the obtained diffraction pattern.
[0046] like figure 1 As shown, the diffraction image acquisition device used in the embodiment of the present invention includes a laser 1, a polarizer 2, a beam expander 3, a first convex lens 4, a holder 5, a second convex lens 6 and A photosensitive element 7; the laser ...
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