Transverse shift by total reflection of a circularly polarised light beam: theory and experimental proof

1972 ◽  
Vol 3 (4) ◽  
pp. 391-395
Author(s):  
O. Costa de Beauregard
2006 ◽  
Vol 266 (1) ◽  
pp. 336-341 ◽  
Author(s):  
Pierre Hillion
Keyword(s):  

1816 ◽  
Vol 106 ◽  
pp. 46-114 ◽  

Dear Sir, In two papers published in the Transactions of the Royal Society, I have given some account of the action of heat in enabling glass to arrange a beam of light, into two oppositely polarised pencils, and I have shown that unannealed glass, in the form of Prince Rupert's drops, possesses distinct optical axes, and acts upon light like all regularly crystallized bodies. My attention was sometime ago recalled to this subject, in consequence of having discovered that reflection from all the metals, and total reflection from the second surfaces of transparent bodies, produced the same effect as crystallized plates, in separating a beam of polarised light into its complementary tints. I was thus led to believe, that the existence of two oppositely polarised pencils, and the production of the complementary colours, were concomitant effects, and I prepared to examine the truth of this supposition in the case of heated glass. In my early experiments on this subject, I had not observed these colours, as I was not then in the possession of a mode of detecting them, when they formed the lower tints of the first order of Newton's scale ( Opticks , B II. Part II.) ; but I have since discovered a method of rendering them in every case visible, by their effects in modifying the colour of a standard plate of sulphate of lime.


2020 ◽  
Vol 15 (1) ◽  
pp. 19-27
Author(s):  
Sven Delbeck ◽  
H. Michael Heise

Background: A wide range of optical techniques has recently been presented for the development of noninvasive methods for blood glucose sensing based on multivariate skin spectrum analysis, and most recent studies are reviewed in short by us. The vibrational spectral fingerprints of glucose, as especially found in the mid-infrared or Raman spectrum, have been suggested for achieving largest selectivity for the development of noninvasive blood glucose methods. Methods: Here, the different aspects on integral skin measurements are presented, which are much dependent on the absorption characteristics of water as the main skin constituent. In particular, different mid-infrared measurement techniques as realized recently are discussed. The limitations of the use of the attenuated total reflection technique in particular are elaborated, and confounding skin or saliva spectral features are illustrated and discussed in the light of recently published works, claiming that the attenuated total reflection technique can be utilized for noninvasive measurements. Results: It will be shown that the penetration depth of the infrared radiation with wavelengths around 10 µm is the essential parameter, which can be modulated by different measurement techniques as with photothermal or diffuse reflection. However, the law of physics is limiting the option of using the attenuated total reflection technique with waveguides from diamond or similar optical materials. Conclusions: There are confounding features from mucosa, stratum corneum, or saliva, which have been misinterpreted for glucose measurements. Results of an earlier study with multivariate evaluation based on glucose fingerprint features are again referred to as a negative experimental proof.


2012 ◽  
Vol 14 (8) ◽  
pp. 085701
Author(s):  
Xiangmin Liu ◽  
Qingfen Yang ◽  
Pengfei Zhu ◽  
Yanli Zhang ◽  
Yan Shi

1977 ◽  
Vol 15 (12) ◽  
pp. 3553-3562 ◽  
Author(s):  
O. Costa de Beauregard ◽  
C. Imbert ◽  
Y. Levy

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