petrographic microscope parts and functions pdf
Below is a brief explanation of the more important parts of the microscope. Revolving nosepiece Rotates to allow use of different power objectives.
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Moves the body tube for focusing the high power.
. Use the diagram as a guide to help you match the parts of the microscope with their function. Stage clips hold the slides in place. The substage assembly includes the condenser the lower polarizer light filters and diaphragms.
A petrographic microscope is a type of optical microscope that uses polarized light to identify rocks and minerals in thin section and to investigate microscopic textures and features that are present in minerals and rocks. A petrographic microscope is a type of optical microscope used in petrology and optical mineralogy to identify rocks and minerals in thin sectionsThe microscope is used in optical mineralogy and petrography a branch of petrology which focuses on detailed descriptions of rocksThe method is called polarized light microscopy PLMDescription. A petrographic microscope is a type of optical microscope that uses polarized light to identify rocks and minerals in thin section and to investigate microscopic textures and features that are present in minerals and rocks.
Apartments in metairie with utilities included near paris disposable cameras bulk. The compound microscope uses lenses and light to enlarge the image and is also called an optical or light microscope vs an electron microscope. This combination is made in order to observe the optical properties of double refracting materials such as crystals.
Where the eyepieces are dropped in. The simplest optical microscope is the magnifying glass and is good to about ten times 10X magnification. The petrographic microscope is a compound microscope which can work with plane polarised light meaning that it has some peculiarities.
Figure 424 View of substage. 872018 2 Simple Compound Stereoscopic. One of the most important parts of a compound microscope.
Brings the specimen into general focus. Always carry a microscope with one hand holding the arm and one hand under the base. Petrographic microscope parts and functions pdf - The Condenser and Substage Assembly.
The upper part of the microscope houses the eyepiece and objective lenses. Figure 1 contains a diagram of a petrographic microscope similar to the type that we have in the lab. The viewer spins the nosepiece to select different objective lenses.
Used for focus on oil. Opaquebothterms are frequently used synonymouslyTheore microscope is similar to conventional petrographic microscopes in the systems of lenses polarizer analyzer andvarious diaphragms employed but differs in that its primary method ofillumination is a light source above the sample to allow examinationby lightreflected from polishedsurfaces. Also it connects the eyepieces to the objective lenses.
The petrographic microscope is much like any other microscope with the exception of a few additional attachments that are necessary for optical mineralogy determination. There are usually two polarizing filters. Also called a polarizing.
The technique of description and characterization of rocks with the aid of a polarized light microscope is a well-established practice in the fields of mineralogy and petrology. Petrographic microscope parts and functions pdf - The Condenser and Substage Assembly. In the Word Bank check the box next to each part of the microscope after you have labeled it on the diagram.
Insert interactive diagrams by Christie Liu and Mark Peale here. Up to 24 cash back Parts and Function of the Compound Light Microscope Objective lenses Focuses and magnifies light coming through the slide. Enabling the movement of the tube.
Figure 423 Top view of microscope. Figure 1 contains a diagram of a petrographic microscope similar to the type that we have in the lab. Rotating Stage Goniometer and Vernier ScaleThe stage is the platform upon which the thin section is placed.
The parts of the microscope that are located above the base but below the stage are called the substage assembly. The flat platform that supports the slides. The thin sectioMechanical StageThe mechanical stage is an accessory which can be attached to the top of the r.
Main Microscope Parts and Functions. The type of illumination varies according to the feature to be studied and may be orthoscopic parallel. This section provides an overview of the parts of a petrographic microscope and what each part.
The petrographic microscope Also called a polarizing microscope In order to use the scope we need to understand a little about. A rotating turret that houses the objective lenses. Parts of a eyepiece arm stageclips nosepiece focusing knobs illuminator stage objective lenses head base Label the parts of the microscope.
Interactive video showing typical adjustments that can be made on the substage assembly. The petrographic microscope is much like any other microscope with the exception of a few additional attachments that are necessary for optical mineralogy determination. Various parts of a microscope on the diagram.
You can use the word bank below to fill in the blanks or cut and paste the words at the bottom. Figure 422 Side view of microscope. This is always done with transmitted plane polarised light meaning that the polariser must be inserted.
This module provides an overview of the parts of a petrographic microscope including the purpose of each. N is a function of crystallographic orientation in anisotropic minerals Öisotropic minerals. Fine tunes the focus and increases the detail of the specimen.
N is a function of crystallographic orientation in anisotropic minerals Öisotropic minerals. Anisotropic materials act as beam splitters and divide light rays into two parts. The technique of polarizing microscopy exploits the interference of the split light rays as they.
Eyepiece ocular lens. Microscope Parts and Functions Microscope One or more lenses that makes an enlarged image of an object. Look at the diagrams of the petrographic microscope and its parts in Figures 421-424.
After you have completed labeling the diagram complete the matching exercise. Also called a polarizing. Characterized by one RI.
Figure 421 Front view of microscope. Below is a brief explanation of the more important parts of the microscope.
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