Difference between revisions of "Spectroscope"
From The Gemology Project
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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 /> | ||
+ | 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 /> | ||
+ | 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)]] | ||
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− | + | There are two types of spectroscopes used in gemology: | |
+ | # Prism spectroscopes (based on dispersion) | ||
+ | # Diffraction grating spectroscopes (based on diffraction) | ||
+ | |||
+ | |||
+ | ==Basic== | ||
+ | |||
+ | ===Absorption=== | ||
+ | ===Types of spectroscopes=== | ||
+ | |||
+ | ====Prism spectroscope==== | ||
+ | |||
+ | [[image:Prismspecmatrix4photoshop_copy.jpg|framed|left|prism spectrum]] | ||
+ | <br clear="all" /> | ||
+ | |||
+ | ====Diffraction grating spectroscope==== | ||
+ | |||
+ | [[image:spectrum1.jpg|framed|left|diffraction grating spectrum]] | ||
+ | |||
+ | <br clear="all" /> | ||
+ | |||
+ | [[image:spectrum2.jpg|framed|left|diffraction grating spectrum with scale in nm]] | ||
<br clear=all /> | <br clear=all /> | ||
+ | |||
+ | ==Related topics== | ||
==Aknowledgements== | ==Aknowledgements== |
Revision as of 04:43, 6 September 2006
This section is currently under construction, do not edit until this message is gone | |
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.
There are two types of spectroscopes used in gemology:
- Prism spectroscopes (based on dispersion)
- Diffraction grating spectroscopes (based on diffraction)
Contents
Basic
Absorption
Types of spectroscopes
Prism spectroscope
Diffraction grating spectroscope
Related topics
Aknowledgements
- Gallery Voltaire for the blank diffraction images
- GemInterest for the blank prism templates