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The atmosphere is full of liquid and solid particles, both man-made and natural. Atmospheric particles play a key role in weather, climate and biological health. Therefore, the accurate measurement of atmospheric particles is of great significance. Digital holography, as a new generation of imaging technology, has the advantages of simple and stable structure, three-dimensional imaging, and the ability to distinguish laminated particles. Digital holography technology has been widely used in the field of three-dimensional morphology measurement, interferometry, nondestructive testing, holographic microscopy, particle field measurement and other fields. In the field of particle field measurement, most optical particle field measurement technologies can only measure spherical particles to obtain the statistical distribution of particle concentration and diameter, such as laser scattering method and phase doppler method.Digital holography can obtain the morphology details, particle size parameters and three-dimensional spatial distribution spectrum of each particle in the particle field. On the basis of the original device, the two-views hologram is recorded by adding a reflector. The coordinates of the particles along the optical axis will be determined by the position of the reflector and the position of the reflected image.
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