Hieslmair, Hans (1932-2021)
Person
Dates
- Existence: 1932-10-30 - 2021-02-13
Found in 6 Collections and/or Records:
Electrical properties of vacuum deposited SiO₂ films by means of a CO₂ laser, 1972
Item — Call number MU Thesis Vag
Identifier: b2088487
Abstract
The technique of using a high power CO₂ laser to deposit films of SiO₂ was studied, and an attempt was made to dope the films with a metallic impurity. Resistivity and dielectric constants were measured to determine the quality of the undoped films and to establish the effect of doping. It was found that the laser evaporation technique yielded the best results when the target material was granular rather than solid and the substrate was heated above 300°F. The films produced were not...
Dates:
1972
Holography : theory, laboratory techniques and some applications, 1970
Item — Call number MU Thesis Ros
Identifier: b2088682
Summary
The purpose of this thesis was to study image formation through holography in such applications as double exposure interferometry and contour generation.
The approach was to study first the properties of holograms and the laboratory techniques needed to produce them. The grating nature of holograms was studied and experimentally demonstrated. In addition, the three-dimensional properties of the reconstructed image were demonstrated by a hologram of several chess...
Dates:
1970
Investigation of reflectance from multi-layered dielectric films, 1970
Item — Multiple Containers
Identifier: b2089520
Abstract
An investigation was conducted to determine the reflectivity of multi-layered dielectric films. The theory was developed for oblique and normal incidence, including vertical and horizontal linear polarization, for single, double and higher order stacks by considering the propagation of a plane, time-harmonic electro-magnetic wave through a stratified medium, including the use of characteristic matrices. Computer programs were written and the theoretical curves obtained for reflectance of...
Dates:
1970
Mode selection in ruby lasers, 1970
Item — Call number MU Thesis Ste
Identifier: b2088113
Abstract
The spectral output of a ruby laser may contain a large number of discrete frequencies which correspond to different allowed modes of the laser cavity. All these modes lie within the spectral line width of the laser line. It was the purpose of the present study to introduce mode selective elements into the cavity in order to reduce the number of modes in the laser beam.
The approach was to build a conventional laser cavity with plane parallel mirrors and to couple a short resonant...
Dates:
1970
The refractive index of thin silicon dioxide films deposited by using a CO₂ laser, 1973
Item — Call number MU Thesis Joh
Identifier: b2088650
Abstract
A CO₂ laser was employed as the heat source to deposit films of SiO₂. The report discusses the measurement of the refractive indices of the thin transparent films produced.
Investigation into the various techniques available for measuring the index of refraction led to the selection of Abeles method for determination of the Brewster angle. A helium-neon laser was used as the source of incident polarized light, while a selenium photocell monitored the reflected...
Dates:
1973
Vacuum deposition of silicon dioxide thin films by a CO₂ laser, 1971
Item — Call number MU Thesis Lev
Identifier: b2088711
Abstract
Most conventional evaporation sources consist of resistance heated metals supporting the evaporant. They have the disadvantage of reacting with the evaporant. This results in the deposition of contaminated films. Evaporation with an electron beam eliminates this problem. However, electron beam evaporation can not be accomplished easily at higher pressures.
An investigation was conducted to determine the feasibility of using a CO₂ laser to produce thin films of SiO₂. A helium-neon...
Dates:
1971