Super-resolution imaging method based on incoherent light field intensity high-order iteration autocorrelation

Abstract

The invention discloses a super-resolution imaging method based on incoherent light field intensity high-order iteration autocorrelation. A system comprises an incoherent light source, an imaging lens, an area array detector and a high-order iteration operation system. Light emitted by the incoherent light source irradiates an object, and a light beam transmitted or reflected and scattered by the object passes through a lens with a focal length f and then is detected by a CCD, an EMCCD, an ICCD or a CMOS area array detector with spatial resolution capability. The area array detector controls a data acquisition time sequence through external triggering, acquires an instant area array intensity signal at each moment to obtain spatial distribution of light field intensity, and performs multiple iterative calculations according to a set order through a high-order iterative operation system. When proper self-correlation order and iteration times are selected, the influence of background noise can be eliminated to a great extent, super-resolution self-correlation imaging is realized, and the imaging quality is better than that of a traditional method.

Description

technical field [0001] The invention relates to the field of super-resolution imaging of incoherent light, in particular to a super-resolution imaging method based on high-order iterative autocorrelation of incoherent light field intensity. Background technique [0002] How to improve the resolution of the imaging system and realize super-resolution imaging has always been an important research direction in the field of imaging science and modern optical high-tech field, and it is also a long-term goal pursued by the optical field. In recent years, correlative imaging technology (also known as "ghost" imaging) has developed rapidly, which is a new imaging method different from classical imaging. Correlation imaging technology can realize imaging with lens like traditional lens imaging system, and can also realize imaging without lens. Compared with traditional classical imaging, which is based on the measurement of the intensity distribution of the light field, correlated i...

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Problems solved by technology

[0003] Although correlative imaging technology has many advantages different from traditional classical imaging or photographic technology, it is still subject to the diffraction limit of the imaging system. At the same time, the imaging resolution and contrast of correlative imaging technology are mutually restrictive. Imaging results in very low contrast, which is a weakness of correlative imaging techniques

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