Advanced Optical Imaging Theory by Min Gu

By Min Gu

Optical microscopy and linked applied sciences complicated quick after the creation of the laser. The options have prompted extra improvement of optical imaging idea, together with three-dimensional microscopy imaging thought in spatial and frequency domain names, the speculation of imaging with ultrashort-pulse beams and aberration idea for high-numerical-aperture pursuits. This booklet introduces those new theories by way of glossy optical microscopy. It contains seven chapters together with an advent. The chapters are equipped to lessen cross-referencing. Comparisons with classical imaging thought are made whilst the hot imaging idea is brought. The publication is meant for senior undergraduate scholars in classes on optoelectronics, optical engineering, photonics, biophotonics and utilized physics, once they have accomplished sleek optics or an identical topic. it's also a reference for different scientists drawn to the field.

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VI). Thus, a narrower APSF results in less cross-talk between the APSFs originating from different positions (x~> y 1). As a result, a high resolution image can be obtained. If the size of a lens is quite large, the 2-D amplitude point spread function becomes h(x, y) = (kx)(ky), which is a point. In this case, there is no cross-talk between the point spread function in the image plane. Thus the image of an object is exp[- ikM 2~ (x~. + y~)(l+ M)]o(- Mx . ,-MyJ . 13) Eq. 13) implies that the image of an object is a magnified and inverted replica of the object in the image plane, if a lens is much larger than the object.

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8) The first factor exp(-ikn Dofn) represents a constant phase term contributed by a beam along the axis, so that it can be neglected. Finally, the complex transmittance of a thin lens is 40 3. Point Spread Function Analysis t(x,y) = P(x,y)exp[ ik(x 2 + v2 ) ] 21 · . 9) It is seen that the phase change caused by a lens shows a quadratic dependence on x and y. For a circularly symmetric lens, the quadratic phase change represents that the lens causes either a convergent wave iff is positive or a divergent wave iff is negative, which are called the positive and negative lenses, respectively.

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