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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


Lecture 7

Monochromator

(filter,

wavelength selector)

Light Source

Detector

Sample

Spectrometer

Data Processing




Lecture 7

UV sources

Deuterium Lamp

Deuterium: higher intensity

Even higher intensity: Xe arc


Lecture 7

Monochromator

(filter,

wavelength selector)

Light Source

Detector

Sample

Spectrometer

Data Processing



Lecture 7

thickness

Refractive index



Lecture 7

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


Lecture 7

Littrow

Cornu

Quarz prisms



Lecture 7

Dispersion:

Resolution (resolving power):

Number of grooves

Diffraction order