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Rp.950,000

[GT02] Pocket Diffraction Grating Spectroscope


[GT02] Pocket Diffraction Grating Spectroscope

Pocket Diffraction Grating Spectroscope

Pocket Diffraction Grating Spectroscope, with fixed slit & fixed focus. Allows you to read a gemstone's spectral signature. Constructed of stainless steel & black acetol, 55mm long, 14.5mm wide, and weighs 28 grams. Comes in a protective carrying case.

The spectroscope is used to analyze light passing through a stone. White light is a combination of all the colors of the visible spectrum: red, orange, yellow, green, blue, indigo, and violet. This is the rainbow we see when light travels through a prism. When white light travels though a stone, one or more of the wavelengths that produce color are absorbed by the gem. The colors that are NOT absorbed are the colors seen when we look at the stone. 

The wavelengths that are absorbed by the stone are seen in the spectroscope as vertical black lines in the spectrum. Each stone has a unique absorption spectrum (like a fingerprint of the stone) When identifying a stone we look for a spectrum that is characteristic for that stone. 

The wavelengths that are absorbed by the stone are seen in the spectroscope as verticle black lines in the spectrum. Each stone has a unique absorption spectrum (like a fingerprint of the stone) When identifying a stone we look for a spectrum that is characteristic for that stone.

 

It comes with a leather carry pouch as shown in the pictures.

 

Spectroscope Buying Guide

In gemology, there are two different types of spectroscopes
each with its own characteristics.

1. Diffraction grating spectroscope
The diffraction grating spectroscope is based on the 
principle of diffraction. Light enters through a narrow slit 
and is then diffracted by a thin film of diffraction grating 
material. This produces a linear spectrum image with a 
generally larger view of the red part than a prism 
spectroscope.

Inside the diffraction grating spectroscope


2.  Prism Spectroscope 
The prism spectroscope is based on dispersion. The light 
enters through a narrow slit and is then dispersed through a 
series of prisms. These models are generally more expensive 
than their diffraction type cousins. 

 Because prism spectroscopes are based on dispersion, the 
blue area of the spectrum is more spread out and the red 
parts are more condensed than the diffraction grating types.

Inside the prism spectroscope



 


In conclusion, prism type is better than diffraction type, 
because it has a larger and more clear image. 

 

 

 

 

 

 

 

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