Licea-Rodriguez, Jacob Loza-Alvarez, Pablo Wavefront coding for fast, high-resolution light-sheet microscopy (Conference Presentation) We conclude that the experiment results agree with the earlier theoretical analysis.
The structure similarity is applied to estimate the relationship among the captured images with varying defocus. The comparison of the tail lengths of point spread functions is represented to show the invariance of the image quality in the extended depth of focus.
A pinhole of 20 μm diameter and the third plate of WT1005-62 resolution patterns are selected as the targets in the imaging experiment. The ideal wavefront map is set to be the system error of the interferometer to simplify the assembly, and the coefficients of certain Zernike polynomials are monitored to verify the result in the alignment process. In this paper, we describe the alignment, the imaging experiment, and the image restoration of the off-axis TMA system with WFC technology. The application of WFC technology in an off-axis three mirror anastigmatic (TMA) system has been proposed, and the design and optimization of optics, the restoration of degraded images, and the manufacturing of wavefront coded elements have been researched in our previous work.
This technology has been applied in many imaging systems to improve performance and/or reduce cost. Wavefront coding ( WFC) is a kind of computational imaging technique that controls defocus and defocus related aberrations of optical systems by introducing a specially designed phase distribution to the pupil function. Moreover, we fabricated a demonstration set assuming the use of a night vision camera in an automobile and showed the effect of the WFC system.Įxperimental study of an off-axis three mirror anastigmatic system with wavefront coding technology. As a result, the effect of the removal of the chromatic aberration of the WFC system was successfully determined. We acquired images of objects using a WFC camera with this lens under the conditions of visible and infrared light. Our original annular phase mask for WFC was inserted to the lens, for which the difference between the focal positions at 400 nm and at 950 nm is 0.10 mm. We perform an experiment of achromatic imaging with wavefront coding ( WFC) using a wide-angle automobile lens. Ohta, Mitsuhiko Sakita, Koichi Shimano, Takeshi Sugiyama, Takashi Shibasaki, Susumu Visible-infrared achromatic imaging by wavefront coding with wide-angle automobile camera
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Nevertheless, the best results are obtained by using the trefoil phase-mask, because the decoded image is almost free of artifacts. Numerical results show defocus invariance aberration in all cases. WFC systems were simulated using the cubic, trefoil, and 4 Zernike polynomials phase-masks. In this, the merit function minimizes the mean square error (MSE) between the diffraction limited Modulated Transfer Function (MTF) and the MTF of the system that is wavefront coded with different misfocus. In this paper, the optimization of the phase deviation parameter is done by means of genetic algorithms (GAs). For years, several kinds of PM have been designed to produce a point spread function (PSF) near defocus-invariant. Wavefront Coding ( WFC) systems make use of an aspheric Phase-Mask (PM) and digital image processing to extend the Depth of Field (EDoF) of computational imaging systems. Optimization of wavefront coding imaging system using heuristic algorithms
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