Type of Document	Dissertation
Author	Kurtz, Robert L.
URN	etd-05202010-020034
Title	A holographic system that records front-surface detail of a scene moving at high velocity.
Degree	PhD
Department	Physics
Advisory Committee	Advisor Name Title Loh, H. Y. Committee Chair Tipsword, R. F. Committee Chair Bowden, Robert L. Committee Member Gilmer, Thomas E. Jr. Committee Member Jacobs, J. A. Committee Member
Keywords	holographic arrangements
Date of Defense	1971-06-05
Availability	restricted
Abstract It is known that any motion of the scene during the exposure of a hologram results in a spatial modulation of the recorded fringe contrast. On reconstruction this produces a spatial amplitude modulation of the reconstructed wavefront that tends to blur out the image. This paper discusses a novel holographic technique that uses an elliptical orientation for the holographic arrangement. It is shown that the degree of image degradation is not only a function of exposure time but also of the system used. The form of the functional system dependence is given, as well as the results of several systems tested, which verify this dependence. It is further demonstrated that the velocity of the target or the exposure time alone is inconsequential by itself and the important parameter is the total motion of the target ΔX = VT. Using the resolution of front-surface detail from a target with a velocity of 17,546 cm/sec, we are able to predict an upper limit on target velocity for resolution of front-surface detail for a given system.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access  LD5655.V856_1971.K87.pdf 20.64 Mb 01:35:32 00:49:07 00:42:59 00:21:29 00:01:50 next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

If you have questions or technical problems, please Contact DLA.