Rolf K. Mueller
Bendix Corporation
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Featured researches published by Rolf K. Mueller.
Journal of the Optical Society of America | 1972
P. N. Keating; Rolf K. Mueller; Takeo Sawatari
The marked chromatic aberration of a Fresnel-zone-plate lens can be used as a variable narrow-band optical filter, and thus a holographic spectrometer. The filtering properties of the zone plate are analyzed, with particular emphasis on the effect of a central stop over the low-order rings. It is shown that the central stop can markedly improve the rejection of frequencies outside the pass band without significant degradation of the spectrometer resolution.
Archive | 1970
Harry Robert Farrah; Emanuel Marom; Rolf K. Mueller
A proposed operational underwater acoustical imaging system using sound holography is described. The performance of the imaging system depends on operational requirements of the user, physical constraints caused by space and power limitations, and the characteristics of each of the essential elements of the system. Each of these factors is discussed from a systems standpoint, with particular emphasis on the performance requirements of the necessary acoustical array, electronic processing, and optical reconstruction and display techniques. A brief summary is given of the status of current developmental programs at Bendix aimed at satisfying the above system requirements.
Archive | 1974
P. N. Keating; R. F. Koppelmann; Rolf K. Mueller; R. F. Steinberg
Holograms representing both real and imaginary parts have been obtained with an on-axis reference from an experimental acoustical underwater viewing system and digitally reconstructed to yield only the real image. The absence of both the conjugate imagery and dc and autoconvolution terms allows maximum efficiency in utilizing the relatively limited amount of sampling often available for microwave and acoustic radiation and reduces conjugate image noise. Improved imagery of underwater targets which has been obtained in this way with relatively light sampling (20 × 20) is presented.
Archive | 1975
P. N. Keating; R. F. Koppelmann; Rolf K. Mueller
The maximization of resolution in three dimensions (range and two lateral dimensions) is discussed, with emphasis on sampled acoustical holograms. An analysis of holography using wide-bandwidth biphase-coded acoustical signals is presented, and experimental results showing substantial increases in range resolution without significant loss of image quality are presented. It is shown that in order to maximize the lateral resolution it is necessary to have a larger number of picture elements in the image intensity display than in the sampled hologram. Experimental results clearly illustrating this point are presented.
Archive | 1970
Rolf K. Mueller; William G. Wolber
Archive | 1980
Takeo Sawatari; P. N. Keating; R. F. Steinberg; Rolf K. Mueller
Archive | 1970
Harry Robert Farrah; Emanuel Marom; Rolf K. Mueller
Archive | 1971
Rolf K. Mueller; Emanuel Marom
Archive | 1969
Harold L Chambers; Emanuel Marom; Rolf K. Mueller
Archive | 1972
Rolf K. Mueller; Emanuel Marom