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http://cio.repositorioinstitucional.mx/jspui/handle/1002/834| COMPLETE MUELLER POLARIMETER BASED ON LIQUID CRYSTAL VARIABLE RETARDERS AND PHOTOELASTIC MODULATORS | |
| ALICIA FERNANDA TORALES RIVERA | |
| GEMINIANO DONACIANO MARTINEZ PONCE Cristina Solano | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| POLARIZATION, .COHERENCE, POLARIMETRY, PEM SYSTEMS, MUELLER MATRIX, LCVR | |
| "The implemented Mueller polarimeter works in transmission and is constituted by two modules: a polarisation state generator (PSG) and a polarisation state analyser (PSA). The PSG is based on a dual system of liquid crystal variable retarders (LCVR) set up in accordance to generate any state of polarisation by combining the induced retardance in each. ON the other hand, the PSA is constituted by a dual Photoelastic Modulator (PEM) system which in turn allows for the measurement of the four Stokes parameters without the need to modify the experimental setup. The measurement for the 16 element Mueller matrix associated to a transparent optical medium is achieved by using a single wavelength ( λ= 632.8nm). The procedure consists on propagating a beam of light with four different polarisation states (generated by the PSG) through the sample and to measure the polarisation state in the outcoming beam with the PSA. The aforementioned provides a system of equations which will in turn lead to details on all the sample’s linear anisotropies such as linear and circular birefringence and linear and circular diattenuation. The system uses a silicon photodiode as a means of detecting the incident beam and its behaviour. The photoreceiver encompasses, along with the photodiode, a preamplifying stage and a lock-in amplifier for signal detection and analysis. The system is controlled via a computer and a data acquisition card from National Instruments™. The control program was developed in Labview™ and allows the user to take measurements either manually, step by step or with an automatic sequence. The applications for this measurement device include material analysis for the development of optical devices, characterisation of optical tissue, detection of polluting substances, and pharmaceutics quality control among many others." | |
| 2010-04 | |
| Tesis de maestría | |
| Inglés | |
| León, Guanajuato | |
| Público en general | |
| Torales Rivera, (2010). "Complete Mueller polarimeter based on liquid crystal variable reatarders and photoelastic modulators". Tesis de Maestría en Optomecatrónica. Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 104 pp. | |
| HOLOGRAFÍA | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | MAESTRIA EN OPTOMECATRÓNICA |
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| 14137.pdf | 1.93 MB | Adobe PDF | Visualizar/Abrir |