Advanced Optical Imaging Theory by Min Gu PDF
By Min Gu
Optical microscopy and linked applied sciences complicated speedy after the creation of the laser. The strategies have encouraged extra improvement of optical imaging concept, together with three-dimensional microscopy imaging concept in spatial and frequency domain names, the idea of imaging with ultrashort-pulse beams and aberration conception for high-numerical-aperture pursuits. This booklet introduces those new theories by way of glossy optical microscopy. It involves seven chapters together with an advent. The chapters are geared up to reduce cross-referencing. Comparisons with classical imaging thought are made whilst the recent imaging thought is brought. The e-book is meant for senior undergraduate scholars in classes on optoelectronics, optical engineering, photonics, biophotonics and utilized physics, when they have accomplished glossy optics or an analogous topic. it's also a reference for different scientists attracted to the field.
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More recently, singularity beams have been found to be promising for focusing a beam of atoms in atom optics 2. 15]. In these applications, the Fresnel diffraction pattern generated by a singularity beam plays an important role [2. 16]. There are a number of ways to generate a beam of a phase singularity. 17]. In this method, an interference pattern between a singularity beam and a plane wave is first calculated and then recorded on a photo-sensitive film. When the film which is linearly processed is illuminated by a plane wave, a singularity beam will occur.
10) It is therefore clear that the function h(x, y) defined in Eq. 9) represents the image of a single point object. h(x, y) is thus called the 2-D point spread function (PSF), or the 2-D amplitude point spread function (APSF) as it gives the complex amplitude of the light field. Eq. 2]. Having understood that h(x, y) is the image of a single point object, one can assume that for a good imaging system means, h(x, y) should be physically a function close to the point object. In other words, h(x, y) falls off quickly as long as x and/or y in the function h(x, y) are not equal to zero.
3) x, z 02 o,~----------------------------~------Fig. 2. 4. I Definition of the diffraction plane (the x 1 y 2 plane). - y 1 plane) and the observation plane (the x2 - For a situation that the observation point is not far away from the optical axis, we can approximately assume (x2- x 1)2 + (v 2 - y 1)2 « z2. Thus Eq. e. the paraxial approximation. In obtaining Eq. 4), we have used ~"" 1+xI 2. As a result of the paraxial approximation, an observation point should be close to the optical axis z. Therefore, the factor cos(n,r) can be considered to be unity and the distance r in the denominator of Eq.
Advanced Optical Imaging Theory by Min Gu