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uses of compound microscopes

Uses of Compound Microscope

Compound Microscopes falls under light microscopes and are diversely useful. They are not just limited to the use of exploring microscopic life in the science labs. Though biological microscopes are one type of compound microscopes, the application of these is extended to the industrial levels. It is essential to understand the distinct needs of compound microscopes in various fields.

Even the basic compound microscopic magnification enables the human eye to look at the target object at forty times greater magnification. The standard magnification of the eyepiece of this microscope is 10x. A compound microscope uses the combination of its objective and ocular lens to view any object. The maximum magnification that these lenses simultaneously provided is 1000x-2000x.

With such high viewing power, minute insects can be observed and dissected in the presence of a 3-dimensional view. Many coin lovers buy these microscopes because very delicate cracks in metals can also be deflected and corrected.

Table of Contents

  • Function of the Eye-piece
  • Use of Oil-Immersion Lens
  • What is the Resolving Capacity of a Compound Microscope?
  • When Compound Microscope was invented?
  • Talking about Slide Preparations
    • Stained Slides are significant to observe
    • Unstained Slides can be used to Study
  • Types of Compound Microscopes and their Purposes
    • Phase-Contrast Microscope
    • Polarizing Microscope
    • Metallurgical Microscope
    • Fluorescence Microscope

Function of the Eye-piece

Single, double, and even triple eye-pieces characterize different varieties of compound microscopes. You cannot avail yourself of the privilege of connecting a camera or a laptop to a single eye-piece microscope. Most compound microscopes have binocular eye-pieces, thus are called binocular microscopes.

Use of Oil-Immersion Lens

Objective lenses of some types of compound microscopes in cooperating the oil-immersion technique. This serves as an ideal refractive index for the image in spite of a shorter focal distance. The lens covered with a drop of oil eliminates the air gap in the way of visualizing the object placed on the stage. This serves as a very clear image.

What is the Resolving Capacity of a Compound Microscope?

It is the ability of any microscope to distinguish and discriminate very fine blended details of any object and elaborate them distinctively. You do not need to burden your pockets with hefty expenses to purchase a high-definition microscope. You can get a cheaper microscope that also fulfills the purpose.

Only if you are related to the research field, you need to spend some extra bucks for hi-tech condensers, higher durability and enhanced compactness, improved customer support services by the microscope manufacturing company, and easily accessible replacement parts in case of any damage. Plano-apochromatic objectives are also among the more costly parts of compound microscopes.

When Compound Microscope was invented?

The first compound microscope was invented in 1595 by Mr. Zacharias Jansen. It served with a total magnifying power of 9x.

As you further learn about the diversities of a compound microscope, you will get to know how versatile every part of it can be. Eye-piece, objective, slide preparations, light source, condenser, and total magnifying and focusing capacities, all vary from one microscope type to another.

Talking about Slide Preparations

Stained Slides are significant to observe

  • Bacteria – We have this Comprehensive guide about Identifying and observing shapes of bacteria
  • Viruses – You can read more about How a Germs looks unders microscope here
  • DNA and other genetic details
  • Samples of thick tissue sections
  • Cell organelles like nucleus and cell membranes
  • Other microbes
  • Blood films

Unstained Slides can be used to Study

  • Algae
  • Pond water constituents and composition

Commonly the group of four objective lenses is entitled as the basic 4x scanning lens, followed by the low-power 10x, a higher magnification magnitude of 40x, and the most powerful 100x lens that essentially requires oil-immersion to accomplish an effective 100x magnification and an ideal resolution.

Mostly these lenses are achromatic, which means that they eliminate the different wavelengths emerging from the light source and converge all rays on an equal medium. This prevents disruption of a clear image formation.

Types of Compound Microscopes and their Purposes

Phase-Contrast Microscope

This microscope makes it convenient to visualize the target object without any additional need to stain or dye the object. An exclusive combination of a variable phase contrasting objective lens and a phase adjusting condenser is used to perceive the distinguishing features. These are proved to be the best microscopes for students, preferred by biologists, scientists, and researchers to observe and learn new things about the blood or bacterial samples they are studying.

Polarizing Microscope

This is used to study chemicals, minerals, and a wide range of rock materials. It detects different light rays emerging from these objects and discovers their flaws on the basis of the phenomenon of cross-polarization of light.

Metallurgical Microscope

This microscope deals with a wide range of metals. It uses dark-field microscopy technology and enlightens the metal’s image via it. The metals do not transmit light. This makes it obvious that if a metal sample is placed on the stage and light is provided via a source at the base of the microscope, then it won’t be able to reach the objective lens.

For this purpose, light is provided in a way to strike the metal surface and reflect on the objective lens. This process allows diagnosing the invisible flaws in metals.

Fluorescence Microscope

This interesting device was introduced back in the twentieth century. As its name suggests, this microscopy is based on the idea of light emission from the object itself, being viewed. The light that is illuminating the object via this microscope is actually the absorbed light. This can be the light from the surroundings or the electromagnetic rays, which the object emits back hardly within a micro-second.

The modifications and concurrent advancements in compound microscopy do not end here. Like every field, compound microscopes are also being upgraded every now and then as per the needs of the occupations where it is needed.

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