diffraction-grating-spectroscope

$: diffraction-grating-spectroscope$
2713 GS An ISO 9001:2208 | ISO 14001:2008 | ISO 13485WHO:GMP Products | GLP Compliant Products

PRODUCT OVERVIEWWeiber spectroscope is ideal tool of the modern gemologist. Our equipment is particularly suitable the infrared or near infrared spectroscopes.

APPLICATION

• Handheld spectroscope • Visible Light Shows absorption lines of the

elements involved in producing its color. • Separation of ruby (chrome) against red or pink

sapphire (iron) to name only one example. • Liquids or Flames colored by metal-salts.

CONDITIONS FOR PROPER FUNCTIONING OF SPECTROSCOPE

This tool requires: • A Good Training • An Appropriate Light Source.

The Weiber Spectroscope displays the following results :

• Colorless stones show no absorption spectrum. • The sunlight shows a typical absorption

spectrum, the Fraunhofersche lines. • F luorescence lamps show an emiss ion

spectrum.

GRATING

SPECTROSCOPE

ACMAS TECHNOCRACY PVT. LTD.www.measuring-meters.com | www.acmasindia.com | www.scientificlaboratoryequipments.com

DETAILLED TECHNICAL CLARIFICATIONS:

What is it: This handy piece of equipment is perhaps the most important tool in gemology, although GIA students generally get a limited exposure to its use. The spectroscope breaks up the light being transmitted from a gemstone into its spectral colors, which allows the gemologist to see the various wavelengths that are being absorbed by the gemstone. Thereby allowing the gemologist to know what elements are contained in the gemstone that are causing the absorption. Making this one of the most important tools in identifying gemstones.

How does it work: Elements within a gemstone will absorb certain levels of energy. And light is energy.

Therefore certain elements in a gemstone will absorb certain colors of light based on what energy level they are absorbing. The spectroscope allows us to see which color of light, or energy, is being absorbed, thereby allowing us to know what elements are in a gemstone. This, in turn, allows us to know more about the gemstone, ie...identification, where it came from, what causes it to have color, etc....

When you look through a spectroscope you will see lines or bands missing from the colors. This is where elements within the stone have absorbed that level of energy or light, letting us know that the element exists within the stone. Here is an example of the absorption spectrum of zircon:

GRATING

SPECTROSCOPE



GRATING

SPECTROSCOPE

Here is an absorption spectrum of almandine garnet:

The wavelengths of light are measured in nanometers. Abbreviated nm. These number are applied to the scale of the spectrum as a guide to show what wavelengths are being absorbed. It should be noted that gemologists should learn to use the spectroscope without having these numbers necessary. Since most hand held spectroscopes will not have these scales visible through the unit. So know where the numbers are, but learn to use your spectroscope without the need to have them visible.

You can see that the elements contained are very different. You can also see why you can identify many gemstones with nothing more than a spectroscope based on the elements contained in them.

What is the story behind the spectroscope: There are two types of spectroscope. The prism and the diffraction grating. The prism spectroscope is composed of three optical grade glass prisms in optical contact with each other as shown below, and the diffraction grating spectroscope uses a diffraction plate to break up the light beam. Here is how the two types work:

Diffraction Grating Spectroscope


SALES OFFICE (INDIA)

312-313, Vardhman Capital Mall, L.S.C. 10, GulabiBagh, Delhi-110052, INDIA

Tel: 0091-11-23646703, 23643054

(M) +91-9313971681| Email: [email protected]

SALES OFFICE (HONG KONG)

Unit D 28 11/f Wing Tat Comm, Bldg 97, Bonham Strand East, Sheung Wan, HONG KONG (PRC).

Tel: 0086-13929598046 | 0086-18922303099

Email: [email protected]

SHOWROOM

141, Rai Industrial Estate, Rai, Sonepat, Haryana-131029, INDIA

Tel: 0091-0-9312219738 (M) +91-9717741167

Email: [email protected]

SALES OFFICE (RUSSIA)

Inmed Trade Street, Ozerkovsky Embankment, Unit No 50 Straine-1, Off-502, Moscow, RUSSIA

Tel: 0049-79592345 | Email: [email protected]

www.measuring-meters.com | www.acmasindia.com | www.scientificlaboratoryequipments.com

TECHNOCRACY PVT. LTD.

diffraction-grating-spectroscope

Documents

Transcript of diffraction-grating-spectroscope