What is the polarizing microscope?
Polarizing microscope is a microscope that is mainly used in geological studies to study geological samples. For this reason, it is also known as a petrographic microscope. It is used in other scientific fields such as medicine and biology. Unlike conventional microscopes that use normal light, the polarizing microscope uses polarized light to study samples. In polarized light waves of light vibrate in one direction; In normal light, the light waves vibrate in random directions.
Polarized light cannot normally see human eyes. However, it can be used in polarized light microscopy to highlight the properties of minerals and other materials. The polarizing microscope uses birefringing optical properties of anisotropic materials to study them.
Anisotropic materials are solid substances that have several refractive indices; Isotropicials that include gases and liquids have only one refractive index. Twirefringence or double refraction occurs when jE Light wave passing through anisotropic material is divided into two rays of different speeds. The sample to be studied is placed on the slip on the rotary phase of the sample. The sample is then illuminated by a light source in the sample phase.
The light passes through the polarizing filter called polarizer and then passes through the exhibition sample. The polarizer is usually fixed in the east to western vibration direction, but can be turned as needed. There is another polarizing filter called Analyzer. It is usually above the target and can be moved in and out of the optical path.
The targets used in the polarizing microscope are necessary to without voltage. The eyepiece can have a cross wire grid or photomicrography. It makes it easier to concentrate between the cross wire grids. Photomicrography is useful when choosing an area for capturing the film.
Many polarization microscopes have a lens Bertrand. Foundbetween the eyepiece and the goal. The Bertrand lens helps the rear focal point of the target to find out that the interference image.
compensatory and retardation plates can also be used in polarizing light microscopy to better observe differences in the optical path. These boards can be placed in the slot into the eyepiece or slot into the tube between the body and the eyepiece tubes.