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Vol. 82, Issue 8, August 2007, pp.1470-1479

 

Bullet

 

Prism Based Real Time Refractometer

 

Anchal Srivastava, R. K. Shukla, Atul Srivastava, Manoj K. Srivastava

and Dharmendra Mishra

Department of Physics, University of Lucknow, Lucknow INDIA-226007

Phone No.:91-522-2740449

Email: rajeshkumarshukla_100@yahoo.co.in

 

 

Received: 16 July 2007   /Accepted: 20 August 2007   /Published: 27 August 2007

 

Abstract: A rigorous theoretical study of prism based real time refractometer sensor where modulation in reflected light intensity with variation in ambient refractive index is the sensing mechanism is made. Effect of polarization of incident light used in such sensors is studied. Effect on emergent light intensity due to reflection and transmission at various interfaces in the sensor configuration is compared with the intensity obtained when only the prism-ambient interface is considered for normal incidence of light at the air-prism interface; result comes out to be the same for both the cases. For obliquely incident light the difference is determined by the percentage fractional loss. Theoretical expressions obtained are in good agreement with experimental observations.

 

Keywords: Refractometer, Prism, Oblique incidence, Fresnels Relations, Refractive index

 

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