Difference between revisions of "Color Filters"
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==Basic== | ==Basic== | ||
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All color filters work on the same principle, they absorp certain wavelengths of light letting only a portion of the visible part of the electromagnetic spectrum pass through. | All color filters work on the same principle, they absorp certain wavelengths of light letting only a portion of the visible part of the electromagnetic spectrum pass through. |
Revision as of 08:15, 14 October 2006
This section is currently under construction, do not edit until this message is gone | |
--Doos 07:47, 14 October 2006 (PDT) |
Color filters have many uses in gemology with the Chelsea Colour Filter™ (CF) as the most prominent of them.
Whilst the CF is the most used, other filters can serve for many other applications. Amongst those are diffused colored plates used in conjunction with a microscope to inspect sapphires, narrow bandwidth filters to determine dispersion and blue, red or yellow filters to examine fluorescence in gemstones.
Some people regard a CF as a primary tool, yet all modern writers disagree with that statement. It can however give clues to the identity of a gemstone when used as an additional (secondary) tool. One can never rely on observations with a color filter alone.
Basic
All color filters work on the same principle, they absorp certain wavelengths of light letting only a portion of the visible part of the electromagnetic spectrum pass through.