Results 261 to 270 of about 58,517 (295)

Physical and psychological optics

European Journal of Physics, 1982
Some visual observations, such as the detection of patterns in conditions of weak contrast, or near the limit of resolution, raise psychological questions which are usually ignored in presentations to physics students. The demonstrations described are intended to make students more aware of the power of the eye and brain, as well as of their capacity ...
openaire   +2 more sources

Optical design with physical optics using GLAD

SPIE Proceedings, 1991
A physical optics code provides the optical designer a means to develop many types of systems which can not be treated properly by geometrical optics. Physical optics must consider a much broader range of effects and components and computational times are longer but the sophistication of physical optics software is now comparable to that of geometrical
openaire   +2 more sources

Experiments in Physical Optics [PDF]

Physics Bulletin, 1971
M Francon, N Krauzman, J P Mathieu and M May London: Gordon and Breach 1970 pp xii + 211 price £5 The field of physical optics lends itself to demonstration experiments more readily than perhaps any other branch of science. In view of the current tendency to stress mathematical formalisms at the expense of observation of phenomena in our physics ...
openaire   +1 more source

On the accuracy of physical optics

IEEE Transactions on Antennas and Propagation, 1982
The first-order correction to the physical optics (PO) solution for the axial radiation field from parabolic reflector antennas is found. The correction is of order k^{-1} and is in quadrature with the PO solution. By means of the correction term the accuracy of the PO surface integral is round to be better than 0.22(\lambda/D)^{2} dB on axis, where D ...
openaire   +2 more sources

Physics in the optical industry

Physics Today, 1960
There are few commercial activities founded more completely upon physics than is the optical industry, but this foundation is very old, and the consequences are not altogether good. The foundation began perhaps with Huygens and Newton, followed with Young, Fresnel. and Fraunhofer, with a special debt to Maxwell.
openaire   +2 more sources

Physical Optics

2018
WAVES Introduction The Nature of Waves Types of Waves Characteristics of Waves Trigonometric Notation of Waves Simple Harmonic Motion Period and Frequency of Simple Harmonic Motion The Simple Pendulum Experimental Work List of References Appendices Further Reading INTERFERENCE AND DIFFRACTION Introduction Interference of Light Young's Double-Slit ...
openaire   +2 more sources

The physics of optical fibres

Physics in Technology, 1984
Optical fibres are making a vital contribution to the development of the 'information society'. The authors examine the construction of optical cables and discuss the practical aspects of optical propagation in ...
K.W. Plessner, R.J. Slaughter
openaire   +2 more sources

On the Modified Theory of Physical Optics

IEEE Transactions on Antennas and Propagation, 2013
Basic features of the modified theory of physical optics (MTPO) are discussed on the example of scattering at perfectly reflecting half-planes and wedges. It is shown that violations of the geometrical optics (GO), introduced in this technique, result in the MTPO solutions which do not satisfy the Helmholtz equation.
Hacıvelioğlu, Feray, Sevgi, Levent, Ufimtsev, Pyotr Yakovlevich   +2 more
openaire   +3 more sources

Review of Optical Physics

1980
The material in this chapter is provided as an introduction to those aspects of optics which play an important role in the subject of optical radiation safety. It is not intended as a comprehensive discourse but is simplified for those individuals who have responsibilities for safety of laser equipment and high intensity light sources, yet have not had
David H. Sliney, Myron L. Wolbarsht
openaire   +2 more sources

Physics of the Optical Emissions [PDF]

, 1971
Excitation of the auroral spectrum emitted from atmospheric atoms and molecules can be attributed to four classes of process: i) direct excitation by primary particles or secondary electrons, ii) thermal collisions involving ionized or excited atoms and molecules, iii) excitation by heated, ambient electrons, and iv) discharge mechanisms and heating by
openaire   +1 more source