Germanium optics-Ge ATR prism
Product Description
Attenuated total reflection (ATR) is a method that allows the direct measurement of samples for FTIR. ATR method involves pressing the sample against a high-refractive-index prism and measuring the infrared spectrum using infrared light that is totally internally reflected in the prism. A diamond, zinc selenide (ZnSe) or germanium (Ge) prism is used in the ATR accessory. Most ATR accessories use a single bounce design, where the IR radiation interacts with the sample only once. Horizontal ATRs (HATRs) would interact with the sample up to 45 times increasing the signal, but use a larger amount of sample.An Attenuated Total Refelction accessory operates by measuring the changes that occur in a totally reflected infrared beam when the beam comes in contact with a sample.
ATR/MIR crystal prism is made up of cut and polished germanium crystals with 45° angles. It is mainly used for the absorption of samples, which come in contact with the prism surface and this is detected when the evanescent field produced by total reflection is absorbed.
Yasi Optics supplies custom made ATR prisms for spectroscopic applications made of ZnSe, Germanium or Silicon. Different sizes and design ATR prisms available. Please contact us for quotation.
Product Parameter
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Using the laser absorption spectrum of ATR prism is a fast developing techonoloy of infrared spectrum, and it is also the most widely sampling techinques at present. It can be tested qualitatively or quantitatively, but requires minimal or no sample preparation.This can greatly speed up the testing and improve efficiency , from the multiple reflection ATR to the single reflection ATR, from the normal temperature measurement to measurement of temperature dependence (maximum temperature up to 300 degrees Celsius), from atmospheric pressure technology to high pressure supercritical technology.For size available or customized size, pls contact with our sales for inquiry. |
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Technical Requirement |
Commercial Grade |
Precision Grade |
High Precision |
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Size range |
1-600mm |
2-600mm |
2-600mm |
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Dimensional tolerance |
土0.1mm |
土0.025mm |
土0.01mm |
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Angle tolerance |
±3´ |
±30´´ |
±5´´ |
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Surface quality |
60-40 |
40-20 |
20-10 |
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Surface accuracy |
1.0λ |
λ/10 |
λ/20 |
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Coating |
3-5μm OR 8-12μm AR, <2% per Surface |
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Bevelling |
0.1-0.5mm*45° |
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Substrate |
Germanium |
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Length(mm) |
Width(mm) |
Thickness(mm) |
Angle |
Remark |
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42 |
14 |
2 |
45 |
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50 |
20 |
2 |
45 |
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52 |
20 |
2 |
45 |
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|
52 |
20 |
2 |
45 |
|
|
60 |
12 |
4 |
45 |
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|
68 |
10 |
6 |
45 |
