The concept of scalar fields with uniformly rotating intensity distributions and propagation-invariant radial scales is extended to the case of electromagnetic fields with rotating but otherwise propagation-invariant states of polarization. It is shown that the conditions for field rotation are different for scalar and electromagnetic fields and that the… (More)
This article examines how polarization modulation can be exploited, not only to increase the diffraction efficiency, but also how it can be used to extend the known optical designs made for narrow-band light to hold also for the broadband radiation.
The condition monitoring and diagnosis of a steel rolling mill requires a variety of measurement techniques. Methods such as vibration measurement, acoustic emission, hydraulic oil analysis, pressure and temperature measurements are frequently applied. Since any single intelligent technique may fail in analysing the required data, an approach to the… (More)
A new approach for the inverse treatment planning in radiation therapy with the multileaf colli-mator (MLC) technique is presented. The application of the MLC-techniques requires an algorithm for the computation of the positions or velocities of leaves as a function of time such that the prescribed dose in the patient space is obtained. First the intensity… (More)