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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

Lecture 7

Light sources, filters, and

monochromators

Harris Ch.20


Monochromator

(filter,

wavelength selector)

Light Source

Detector

Sample

Spectrometer

Data Processing




UV sources

Deuterium Lamp

Deuterium: higher intensity

Even higher intensity: Xe arc


Monochromator

(filter,

wavelength selector)

Light Source

Detector

Sample

Spectrometer

Data Processing



thickness

Refractive index



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


Littrow

Cornu

Quarz prisms



Dispersion:

Resolution (resolving power):

Number of grooves

Diffraction order


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