पोलरीमीटर इसके अंग्रेजी अर्थ का उदाहरण

The GST is a clear aperture off-axis telescope, which feeds its unobstructed light to visible light and near-infrared (NIR) spectro-polarimeters.

Light corrected by adaptive optics is fed to either the visible (VIS) or near-infrared (NIRIS) spectro-polarimeter.

(EireTrains) - Irish Railway Station Photo Archive A polarimeter is a scientific instrument used to measure the angle of rotation caused by passing polarized light through an optically active substance.

With a known concentration of a sample, polarimeters may also be applied to determine the specific rotation when characterizing a new substance.

The polarimeter is made up of two Nicol prisms (the polarizer and analyzer).

Types of polarimeter.

Laurent's half-shade polarimeter.

In order to determine specific rotation of an optically active substance (say sugar) the polarimeter tube T is first filled with pure water and analyzer is adjusted for equal darkness (Both the halves should be equally dark) point.

Now the polarimeter tube is filled with sugar solution of known concentration and again the analyser is adjusted in such a way that again equally dark point is achieved.

Biquartz polarimeter.

In biquartz polarimeters, a biquartz plate is used.

Quartz-Wedge polarimeter.

The earliest polarimeters, which date back to the 1830s, required the user to physically rotate one polarizing element (the analyzer) whilst viewing through another static element (the detector).

Although most manual polarimeters produced today still adopt this basic principle, the many developments applied to the original opto-mechanical design over the years have significantly improved measurement performance.

Most modern manual polarimeters also incorporate a long-life yellow LED in place of the more costly sodium arc lamp as a light source.

Today, semi-automatic polarimeters are available.