Advanced Optical Imaging Theory by Min Gu

By Min Gu

Optical microscopy and linked applied sciences complicated fast after the creation of the laser. The options have encouraged extra improvement of optical imaging concept, together with three-d microscopy imaging conception in spatial and frequency domain names, the idea of imaging with ultrashort-pulse beams and aberration idea for high-numerical-aperture targets. This ebook introduces those new theories by way of smooth optical microscopy. It includes seven chapters together with an creation. The chapters are equipped to lessen cross-referencing. Comparisons with classical imaging concept are made whilst the hot imaging thought is brought. The publication is meant for senior undergraduate scholars in classes on optoelectronics, optical engineering, photonics, biophotonics and utilized physics, when they have accomplished sleek optics or an analogous topic. it's also a reference for different scientists attracted to the field.

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And Quan. , 24 (1992) S951. 2], discussions on imaging performance of a lens are usually limited to thin objects because conventional optical microscopy provides a two-dimensional (2-D) image of a thin sample. 3] which allows one to perform three-dimensional (3-D) imaging of a sample with depth structures. 4]. All of these new developments require a better understanding of the performance of a lens along the axial direction. 4. A discussion on the same topic without this approximation can be found in Chapter 6.

Z In terms of Eqs. 10), one can rewrite Eqs. 12) respectively, where p = rja is the normalized radial coordinate over the lens aperture. 13) P(p) = 0 , otherwise, for a uniform circular pupil. Taking the modulus squared of Eq. 2 Diffraction by a Lens > ·20 ·10 0 vx u (a) (b) 10 20 Fig. 4 Intensity distribution of a single circular lens in the focal plane tal and in the axial plane including the optical axis near the focus (b). 1 of the intensity normalized by the peak intensity. vx and vy are the two orthogonal directions in the transverse plane.

It is clearly seen that the intensity is zero in the center of the focal plane. 3 Coherent Image Formation The diffraction pattern by a lens derived in the last section is under the condition of the uniform illumination on the lens aperture. To analyse the imaging performance of a lens or a lens system, we need to consider an object placed in front of a lens. 3 Coherent Image Formation 51 tion, we assume a thin object imaged by a thin lens. The imaging performance of a thin lens for a thick object will be discussed in the next section.

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