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Lecture 7

Lecture 7. Light sources, filters, and monochromators Harris Ch.20 . Monochromator (filter, wavelength selector). Light Source. Detector. Sample. Spectrometer. Data Processing. Black body radiation. A tungsten lamp. 3000 K. UV sources. Deuterium Lamp.

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Lecture 7

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  1. Lecture 7 Light sources, filters, and monochromators Harris Ch.20

  2. Monochromator (filter, wavelength selector) Light Source Detector Sample Spectrometer Data Processing

  3. Black body radiation

  4. A tungsten lamp 3000 K

  5. UV sources Deuterium Lamp Deuterium: higher intensity Even higher intensity: Xe arc

  6. Monochromator (filter, wavelength selector) Light Source Detector Sample Spectrometer Data Processing

  7. Filters

  8. thickness Refractive index

  9. A Bunsen monochromator

  10. Refractive index of NaCl 350 nm 1.58 460 nm 1.56 680 nm 1.54 1250 nm 1.53 7.30mm 1.51 10.6mm 1.49 12.0mm 1.48 13.1mm 1.47 14.2mm 1.46 15.1mm 1.45 16.0mm 1.44 Detector plate

  11. Littrow Cornu Quarz prisms

  12. Czerney-Turner monochromator

  13. Dispersion: Resolution (resolving power): Number of grooves Diffraction order

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