Inaug.-diss.--Breslau. / Lebenslauf.

Inaug.-diss.--Rostock.

No description available.

Polarization aberrations are the variations of amplitude, phase, polarization and retardance associated with ray paths through optical systems. This dissertation develops methods for calculating the polarization aberrations of radially symmetric systems of weak polarizers, systems like lenses, telescopes and microscopes. The instrumental polarization in these systems arises from weak polarization effects occurring near normal incidence at glass, metal and thin film coated interfaces. Polarized light and polarizers are treated using the Jones calculus. Weak polarizers, optical elements with small polarization effects, are treated by expanding the Fresnel equations and thin film equations into a Taylor series. Methods are given for calculating the Taylor series coefficients for a multilayer coated interface whose polarization performance is known, for example from a thin film design program. Equations are derived for the propagation of polarized light through optical systems. Weak polarizers are shown to be very weakly order dependent; this greatly facilitates the calculation of the effect of a sequence of weak polarizers. The dominant terms are order independent polarization terms which are readily calculated. The order dependent portion can be systematically evaluated as higher order terms. The instrumental polarization, being a function of angle of incidence, is different for different rays through the system. Thus an optical system is a spatially varying polarizer. The instrumental polarization associated with a single surface is often well approximated as a "parabolic" polarizer. The instrumental polarization function is calculated as a Taylor series Jones matrix about the optical axis as a function of object and pupil coordinates. The resulting spatial variations of the instrumental polarization function bear a strong resemblance to the wavefront aberrations, since both arise from fundamental geometrical considerations. In particular, there are terms in the weak linear polarization and in the weak retardance of radially symmetric systems which strongly resemble defocus, tilt and piston error. A polarization aberration expansion is defined to second order in the object and pupil coordinates. A method is derived for calculating the polarization aberration coefficients for a sequence of radially symmetric surfaces from the Taylor series representation of the polarization associated with the individual interfaces.

Li Yuen Yee Laura = 激光懸浮慢速揮發微液滴之彈性散射光之研究 / 李婉兒. / Thesis submitted in: August 2005. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references (leaves 97-99). / Text in English; abstracts in English and Chinese. / Li Yuen Yee Laura = Ji guang xuan fu man su hui fa wei ye di zhi tan xing san she guang zhi yan jiu / Li Waner. / Acknowledgements --- p.3 / Abstract --- p.4 / Chapter Chapter 1 --- Introduction --- p.6 / Chapter Chapter 2 --- Theory --- p.10 / Chapter 2.1 --- "Cross sections for absorption, scattering and extinction" --- p.10 / Chapter 2.2 --- Morphology-dependent resonances and spherical cavity modes assignment --- p.11 / Chapter 2.3 --- Broadening of MDR and removal of degeneracy --- p.15 / Chapter 2.4 --- Radiation pressure and stable levitation position --- p.17 / Chapter 2.4.1 --- Radiation pressure --- p.17 / Chapter 2.4.2 --- Laser levitation --- p.19 / Chapter 2.4.3 --- Stable levitation positions --- p.23 / Chapter 2.5 --- T-matrix method --- p.25 / Chapter Chapter 3 --- Experiment --- p.30 / Chapter 3.1 --- Choice of liquid --- p.30 / Chapter 3.2 --- Simultaneous recording of the differential cross-section and the position of a laser-levitated dodecane microdroplet --- p.30 / Chapter 3.3 --- Dual-wavelength experiment --- p.35 / Chapter Chapter 4 --- Data Analysis --- p.37 / Chapter 4.1 --- Upper and lower limits on the size parameter --- p.38 / Chapter 4.2 --- Refractive index --- p.40 / Chapter 4.3 --- Evaporation rate --- p.42 / Chapter 4.4 --- Acceptance angle --- p.43 / Chapter 4.5 --- Vertical position --- p.44 / Chapter Chapter 5 --- Results and Disscussions --- p.53 / Chapter 5.1 --- High-order MDR's --- p.53 / Chapter 5.2 --- Signatures of low-order resonances --- p.64 / Chapter 5.3 --- Discussions --- p.69 / Chapter Chapter 6 --- Conclusion and Future Outlook --- p.90 / Appendix 1 --- p.92 / List of Figures --- p.94 / List of Tables --- p.96 / References --- p.97

The di raction of a one-dimensional expansion wave over a 90 corner was explored using experiment and simulation methods. Unlike studies in shock di raction, expansion wave di raction was hardly explored in the literature and therefore is considered as novel. Two independent parameters were identi ed for the present study: 1) the initial diaphragm shock tube pressure ratio, and 2) the position of the diaphragm from the apex of the 90 corner. The experimentation only considered variation in the shock tube pressure ratio whereas the simulation varied both independent parameters. A Navier-Stokes solver with Menters SST k-! turbulence model was found to adequately model the ow eld. A number of major ow features were identi ed, that occurred in the vicinity of the 90 corner. The ow features identi ed were: a shear layer which originated by ow separation near the apex of the 90 corner, a separation bubble that remained attached to a wall boundary in absence of rig-dependent e ects, and a re ected compression wave due to perturbation signals generated by di raction of the expansion wave. For a narrow-width expansion wave existing prior to di raction, it was found that after di raction a re ected compression wave developed which would steepen into an outwardly propagating, weak, cylindrical shock wave. Other major ow features identi ed were a strong indication of an oblique shock located near the separation bubble and a large wake region immediately downstream of the separation bubble. The wake region, through schlieren imaging, was found to consist of two distinct layers. The experimental results through shadowgraph and schlieren imaging have indicated large-scale turbulent structures within the separation bubble and the shear layer. Shear layer instability and vortex shedding o the separation bubble were also evident. The Navier-Stokes solver was found not to resolve the experimentally observed turbulence, the wake region and the vortex shedding.

Thesis (M.S.)--Oregon Graduate Center, 1972.

Abstract The delivered quantity of TFT-LCD of Taiwan is more than that of Japan in the first quarter 2002. It pushes Taiwan to the position of NO2 in the world, only next to Korea. Hence Taiwan government has included the TFT-LCD industries as the strategic industries to develop. In the near future, we can forecast that TFT-LCD will succeed the semi-con- ductor industry to stand for the star industry of Taiwan. It is expectable that the TFT-LCD industry will help developing our electronic industry and contribute to the national economy. Back Light Modules are the most important key components in this industry. Especially after the newly risen TFT-LCD causing the CRT substitution effect which will bring in considerable business opportunity. Aparently, to be a key component of TFT-LCD, the Back Light Modules industry will possess limitless opportunity. This thesis trying to take ¡§K¡¨ company as an example for exploring that how the traditional CRT components factory stride across to the TFT-LCD components---Back Light Modules industry. How to create the synergy and competitive advantages by using the current visible and invisible resources of the CRT components. By way of the benchmark enterprise to establish the challenge target and point out the superiority & inferiority of both parties clearly and also to analyse the opportunity and threat of ¡§K¡¨ company. Eventually, this thesis also trying to analyse what necks will be met and the strategies to break through on challenging the benchmark enterprise. Hoping it will be valuable to those enterprises that intended to invovle in these similar industries. The focus conclusions of this study will be as below: 1. Hi-tech industry will lose their competitiveness easily. Enterprise can¡¦t make their original industry a last-ditch defense. They should strid across to the newly industry actively and steadily to look for the hope of future in the newly industry. 2. Although the traditional industry have played an important role on the economic miracles in Taiwan, but we also have faced the keen competition from Main Land China as well as the newly risen industrialized countries. In addition to speculating on how to strengthen our competitiveness advantage to meet head on the local competition, we also need to conceive of the necessary stategies and overall arrangement to defeat Main Land China. 3. ¡§K¡¨ company has the sustained competitive advantages. Perhaps the prices offered maybe not the cheapest but combined with the excellent product and superior service quality that should make customers feel cheap and fine. 4. The labor¡¦s technical capability will be the key competitive weapon in the 21 century.

No description available.

No description available.