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

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

3. Black body radiation

4. A tungsten lamp 3000 K

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

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

8. Filters

10. thickness Refractive index

11. A Bunsen monochromator

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

13. Quarz prisms Littrow Cornu

14. Czerney-Turner monochromator

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