Th. doct.--Physique expérimentale--Göteborg (Suède)--Chalmers university of technology, Göteborg university, 2003. / Bibliogr. p. 45-50. Annexes.

No description available.

Thesis (M.S.)--University of Michigan, 1957.

Th. doct.--Signal et images--Paris--ENST, 1992. / Bibliogr. p. 18-19.

Call number: LD2668 .T4 1939 G81 / Master of Science

This dissertation investigates a method for extending the measurement range of an optical surface profiling instrument. The instrument examined in these experiments is a computer-controlled phase-modulated interference microscope. Because of its ability to measure surfaces with a high degree of vertical resolution as well as excellent lateral resolution, this instrument is one of the most favorable candidates for determining the microtopography of optical surfaces. However, the data acquired by the instrument are restricted to a finite lateral and vertical range. To overcome this restriction, the feasibility of a new testing technique is explored. By overlapping a series of collinear profiles the limited field of view of this instrument can be increased and profiles that contain longer surface wavelengths can be examined. This dissertation also presents a method to augment both the vertical and horizontal dynamic range of the surface profiler by combining multiple subapertures and two-wavelength techniques. The theory, algorithms, error sources, and limitations encountered when concatenating a number of profiles are presented. In particular, the effects of accumulated piston and tilt errors on a measurement are explored. Some practical considerations for implementation and integration into an existing system are presented. Experimental findings and results of Monte Carlo simulations are also studied to explain the effects of random noise, lateral position errors, and defocus across the CCD array on measurement results. These results indicate the extent to which the field of view of the profiler may be augmented. A review of current methods of measuring surface topography is included, to provide for a more coherent text, along with a summary of pertinent measurement parameters for surface characterization. This work concludes with recommendations for future work that would make subaperture-testing techniques more reliable for measuring the microsurface structure of a material over an extended region.

Thesis (M.A.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / It is the purpose of this thesis to assemble and evaluate the art of cinephotomicrography as related to biology. Early investigators used photographic methods but did not describe them in a manner that could be used by others. The first recorded use of cinephotomicrography was made by Marey in 1894 in studying the flight of birds. Later camera-microscope combinations were employed to study fertilization and division of cells, and in observing capillary circulation. The motion picture camera is uniquely suited to automatically record microscopic phenomena, and to the slowing or accelerating of natural processes for detailed study. The Committee on Standards for Motion Pictures of Biological Material (Biological Photographers Association) has outlined the following criteria for successful cinephotomicrography: 1. The 16mm film size is preferable because of low cost and generally available projection facilities. 2. Color film is preferable to black and white when the color of the object photographed is essential to identification. 3. Sound films are valuable for historical purposes, and for recording auditory phenomena as speech, animal sounds and diagnostic sounds. Their use in teaching is limited because of the necessity of adapting films to specific classroom situations by the use of teacher commentary. 4. Excellence of a film depends on the quality of photographic teachique, presentation, adequacy of titles, and editing. 5. Subject matter must be carefully chosen. Cinephotomicrographic techniques appear to be especially valuable for use in the following circumstances: 1. Recording of life of organisms in their natural environment or showing their adaptability to unusual conditions. 2. Analysis of living processes. 3. Audience viewing of small-scale processes. 4. For demonstration of experiments. At Boston University a simple and practical method of cinephotomicrography applicable to research on the microcirculation was developed by the author during the period 1936-40. The basic instrumentation (including apochromatic objectives, compensating oculars, and a light splitting prism) has since been improved and is now widely used in research and in the preparation of teaching films. The cinephotomicrographic method has in some instances been found to be one of the best means of recording scientific data. Films can also be used to eliminate the necessity of repeating experiments, to demonstrate to a class experiments too elaborate or expensive to perform in a school laboratory, and to illustrate biological processes for the understanding of the layman. Recently several new instruments and techniques have been applied to scientific motion picture use. The stroboscopic light developed by H.E. Edgerton has made possible the analysis of extremely rapid motions. Television systems have been adapted for the study of such phenomena as transcapillary exchange in living organs. The use of television opens the possibility of sharing scientific experiments and data on a wider basis. The polar planimeter is an instrument used for the determination of the area of irregular plane surfaces. Used in conjunction with the camera and microscope this device is a reasonably accurate tool. Infra red photography is valuable in the study of disease symptoms To data this technique has been mainly applied to plants but is being adapted by the medical profession for use in animal tissues. In recent years teaching films have become an important part of most science curricula. The well known film "Hemo the Magnificent" was based on work by Fulton and Lutz at Boston University. Video tape recording and closed circuit television systems offer tremendous possibilities in the area of team teaching. Technical advances in cinephotomicroscopy are now reaching a level matching that of other areas of our technology. / 2031-01-01

No description available.

Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: vacuum; shape and deformation measurement; MEMS; vibrometry; scanning white light; Interferometry; thermal; vibration. Includes bibliographical references (136-139 leaves ).

Thesis (Ph. D.)--Oregon Graduate Center, 1976.