Difference between revisions of "Spectroscope"

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{{edit|[[User:Doos|Doos]] 03:37, 28 July 2006 (PDT)}}
 
{{edit|[[User:Doos|Doos]] 03:37, 28 July 2006 (PDT)}}
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The spectroscope is a tool to examin which parts of white light are absorbed by a gemstone (as well as in other materials).<br />
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Materials can absorb parts of the electromagnetic spectrum and when the absorbed parts fall with in the visible range, that absorbed part will influence the color of the material.<br />
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When a gemstone is observed with a spectroscope, the absorbed parts show as dark lines and/or bands in the spectroscope image.
  
 
[[image:opl.jpg|framed|OPL teaching diffraction grating spectroscope on stand (left) and prism spectroscope with adjustable slit (right)]]
 
[[image:opl.jpg|framed|OPL teaching diffraction grating spectroscope on stand (left) and prism spectroscope with adjustable slit (right)]]
[[image:spectrum1.jpg|framed|diffraction grating spectrum]]
 
[[image:spectrum2.jpg|framed|diffraction grating spectrum with scale in nm]]
 
  
[[image:Prismspecmatrix4photoshop_copy.jpg|framed|prism spectrum]]
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There are two types of spectroscopes used in gemology:
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# Prism spectroscopes (based on dispersion)
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# Diffraction grating spectroscopes (based on diffraction)
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==Basic==
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===Absorption===
  
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===Types of spectroscopes===
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====Prism spectroscope====
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[[image:Prismspecmatrix4photoshop_copy.jpg|framed|left|prism spectrum]]
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<br clear="all" />
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====Diffraction grating spectroscope====
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[[image:spectrum1.jpg|framed|left|diffraction grating spectrum]]
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<br clear="all" />
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[[image:spectrum2.jpg|framed|left|diffraction grating spectrum with scale in nm]]
 
<br clear=all />
 
<br clear=all />
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==Related topics==
  
 
==Aknowledgements==
 
==Aknowledgements==

Revision as of 03:43, 6 September 2006

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Doos 03:37, 28 July 2006 (PDT)

The spectroscope is a tool to examin which parts of white light are absorbed by a gemstone (as well as in other materials).
Materials can absorb parts of the electromagnetic spectrum and when the absorbed parts fall with in the visible range, that absorbed part will influence the color of the material.
When a gemstone is observed with a spectroscope, the absorbed parts show as dark lines and/or bands in the spectroscope image.

OPL teaching diffraction grating spectroscope on stand (left) and prism spectroscope with adjustable slit (right)

There are two types of spectroscopes used in gemology:

  1. Prism spectroscopes (based on dispersion)
  2. Diffraction grating spectroscopes (based on diffraction)


Basic

Absorption

Types of spectroscopes

Prism spectroscope

prism spectrum


Diffraction grating spectroscope

File:Spectrum1.jpg
diffraction grating spectrum


File:Spectrum2.jpg
diffraction grating spectrum with scale in nm


Related topics

Aknowledgements