By Professor Dr. G. N. Ramachandran (auth.), S. Flügge (eds.)
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Extra info for Kristalloptik · Beugung / Crystal Optics · Diffraction
Superposing equal proportions of oppositely polarised radiation. Any pair of oppositely polarised beams may be used and they all lead to the same state, namely unpolarised light. It follows from this that any analyser transmits exactly half the intensity of a beam of unpolarised light. Although the above picture of unpolarised light is perfectly consistent and in conformity with quantum mechanics, it may be worthwhile to consider some of the earlier ideas. BREWSTER supposed that natural light is made up of two plane polarised waves, with their vibration directions at right angles and being propagated independently.
2) hold good only for a definite wavelength. In particular, a quarter wave plate prepared for one wavelength is not useful for other wavelengths. An achromatic quarter wave plate, whose phase retardation is a constant over the visible region may however be obtained by combining three plates of mica 3. 1 A review of infrared polarisers is given in Cahiers de Phys. 38, 26. The theory of "pile" polariser, including multiple reflections is discussed by G. K. T. CONN and G. K. EATON: J. Opt. Soc. Amer.
N. RAMACHANDRAN and S. RAMASESHAN: Crystal Optics. Sect. 21. , such that Po is brought to a point P on the equator), since whatever be the setting FE of the birefringent half-shade, the states PI and P2 emerging from its two halves will be symmetrically above and below the equator, and consequently the birefringent half-shade will appear matched. The formulae in this case are clearly identical with those for the Stokes-MacCullagh a b Fig. 17 a and b. Tool elliptic analyser at correct setting. (a) Tbe incident state Po is brought to p.
Kristalloptik · Beugung / Crystal Optics · Diffraction by Professor Dr. G. N. Ramachandran (auth.), S. Flügge (eds.)