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Spectral analysis using a new opto-mechanical instrument

Jafari, R ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.3923/jas.2008.3669.3675
  3. Publisher: 2008
  4. Abstract:
  5. Design and operation of an opto-mechanical system for spectral analysis using a double fiber design for light delivery are reported in this study. A simple mechanical drive system is used, which is able to perform a fine course of angular motion for the scanning of the dispersive optical element. The presented system consists of a mechanical drive system, a dispersive element, a double fiber assembly and a photodetector. A source light, a digital multimeter and a PC are used to test the presented design. The first-order diffraction of the white light source is obtained by using a reflection diffraction grating in Littrow arrangement. By comparing the output reflection signals of the plane mirror and plane grating it is concluded that the output signal is related to the first-order diffraction rather than zero order, which corresponds to that of the plane mirror. In another test a holographic grating is used in place of the ruled grating and the first-order diffraction is resolved for this grating. The groove number for the ruled grating is 1370 g mm-1 where the first-order diffraction angle is about 20° while for the holographic grating with 1200 g mm-1 the first-order diffraction angle at similar wavelength is about 17.45°. © 2008 Asian Network for Scientific Information
  6. Keywords:
  7. Design and operations ; Digital multimeters ; Dispersive elements ; Grating ; Mechanical drive system ; Mechanical scanner ; Opto-mechanical systems ; White light sources ; Design ; Dispersion (waves) ; Fibers ; Holographic gratings ; Light sources ; Machine design ; Mirrors ; Spectrum analysis ; Diffraction
  8. Source: Journal of Applied Sciences ; Volume 8, Issue 20 , 2008 , Pages 3669-3675 ; 18125654 (ISSN)
  9. URL: https://scialert.net/abstract/?doi=jas.2008.3669.3675