โ Scribed by B.R.A. Nijboer
No coin nor oath required. For personal study only.
In this paper the geometrical aberrations of a rotationally symmetrical optical system are dealt with in a n.ew way, suggested by the wave-optical treatment of the image errors to be published subsequently. A spherical surface is introduced with its centre at the G a u s s i a n image (situated at a radial distance a from the axis) and passing through the centre of the *) The results concerning the diffraction theory will be published in Part II (by F" Zernike)
and in Part III (by the author). The contents of Part I and Part III are more extensively dealt with in the author's thesis, Groningen 1942.
๐ SIMILAR VOLUMES
This paper is divided into two parts. The author's purpose in Part I is to formulate the equations of motion describing the linear dynamics of bladed disc assemblies. The problem of calculating the natural frequencies of a rotating bladed disk is solved by the Ritz method. A consistent second order
Absl~et--If we know that a wave of given exceptionally large crest-to-~ough height occurs at a fixed point x\_o at an instant to in a random wind-generated sea state, we can predict what happens with a very high probability before and after to in an area surrounding x o. The expressions of the surfa