A device and method for beam complex amplitude compound modulation applied to super-resolution

Abstract

The invention relates to a light beam complex amplitude composite modulation device and method applied to super resolution. The light beam complex amplitude composite modulation device is composed of a front-end optical system, a pupil plane complex amplitude modulation system, a deformable mirror, an imaging lens, an imaging CCD, a data processing computer and a plurality of reflectors; the pupil plane complex amplitude modulation system is provided with combinations of a plurality of kinds of amplitude and wave front phase filters, and realizes specific modulation for different pupil plane complex amplitudes according to the differences of target characteristics; after the modulation, a light beam is reflected into the deformable mirror; the deformable mirror performs higher-order wave front phase modulation on the light beam; the light beam converges at the target surface of the CCD through the imaging lens; and the data processing computer optimizes the surface shape of the deformable mirror according to the far-field image of the observation target of the imaging CCD so as to ultimately obtain a super-resolution image. The light beam complex amplitude composite modulation device and method applied to super resolution of the invention have the advantages of high spatial modulation frequency, large dynamic range, targeted optimization on images and the like, can provide a new technology for a diffraction limited optical system to achieve super-resolution imaging.

Description

technical field [0001] The invention relates to a technical means applied to super-resolution imaging and realizing compound modulation of light beam complex amplitude at the back end of the original optical system. It is especially suitable for improving the resolving power of the original optical system without changing the structure. Background technique [0002] In the case of a certain optical imaging wavelength, the theoretical resolution of the optical system is inversely proportional to the aperture of the optical system. Affected by the manufacturing cost of the optical system and other design factors, the aperture of the optical system cannot be enlarged without limit. The resolution of the optical system can be expressed by the main lobe radius of the far-field point spread function (PSF, Point Spread Function). According to the relevant principles of Fourier optics, the far-field point spread function of the optical system is the Fourier transform of the pupil ...

AI Technical Summary

Problems solved by technology

The deformation range of the deformable mirror is affected by the distribution of the driver and the stroke of the driver, and its surface shape cannot be greatly changed in a short distance, so the modulation of the wavefront phase is limited to the low spatial frequency range

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