Dr. Bernhard Bardach at dining table with unidentified officers Military; Portraits

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Dr. Bernhard Bardach Military; Portraits

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Unidentified soldiers at observation post Military; Portraits; Groups

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Dr. Bernhard Bardach giving cholera vaccinations to unidentified soldiers; Chorlupy Military; Portraits; Groups

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Dr. Bernhard Bardach with unidentified soldiers before departing to the Italian Front Military; Portraits; Groups

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Dr. Bernhard Bardach reading at birchwood desk; Russia Military; Portraits

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heilbrunn, karl Military; Portraits

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heilbrunn lt. karl Military; Portraits

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heilbrunn julius; heilbrunn karl Military; Portraits

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heilbrunn fritz; card to heilbrunn karl; group of unidentified soldiers Military; Portraits

correspondence: card from fritz to karl; returned 4/ 16

helbrunn, fritz. orderly; unidentified military personel; unidentified wounded; unidentified children; field hospital Military; Portraits

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heilbrunn, fritz Military; Portraits

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heilbrunn fritz; 2 unidentified soldiers Military; Portraits

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Elementary particles, general relativity and f-mesons

Abstract is not available.

Paraxial Maxwell beams: transformation by general linear optical systems

Extending the work of earlier papers on the relativistic-front description of paraxial optics and the formulation of Fourier optics for vector waves consistent with the Maxwell equations, we generalize the Jones calculus of axial plane waves to describe the action of the most general linear optical system on paraxial Maxwell fields. Several examples are worked out, and in each case it is shown that the formalism leads to physically correct results. The importance of retaining the small components of the field vectors along the axis of the system for a consistent description is emphasized.