Parts and Functions of a Light Microscope (Part II)

A primitive microscope was invented in 1590 in Middelburg, Netherlands, by the eyeglass makers Hans Lippershey, Zacharias Jansen and his father Hans Jansen. Further, Galileo Galilei improved the instrument by using a set of aligned lenses and called it "occhiolino", what means "little eye". In 1625, Giovanni Faber named Galileo Galilei's "occhiolino" as a compound microscope and this name remains until today.

The optical microscope, the most common type of microscope, contains several parts with specific functions. Observe the picture and find their functions.

1. Eyepiece: contains the ocular lens, which provides a magnification power of 10x to 15x, usually. This is where you look through.

2. Nosepiece: holds the objective lenses and can be rotated easily to change magnification.

3. Objective lenses: usually, there are three or four objective lenses on a microscope, consisting of 4x, 10x, 40x and 100x magnification powers. In order to obtain the total magnification of an image, you need to multiply the eyepiece lens power by the objective lens power. So, if you couple a 10x eyepiece lens with a 40x objective lens, the total magnification is of 10 x 40 = 400 times.

4. Stage clips: hold the slide in place.

5. Stage: it is a flat platform that supports the slide being analyzed.

6. Diaphragm: it controls the intensity and size of the cone light projected on the specimen. As a rule of thumb, the more transparent the specimen, less light is required.

7. Light source: it projects light upwards through the diaphragm, slide and lenses.

8. Base: supports the microscope.

9. Condenser lens: it helps to focus the light onto the sample analyzed. They are particularly helpful when coupled with the highest objective lens.

10. Arm: supports the microscope when carried.

11. Coarse adjustment knob: when the knob is turned, the stage moves up or down, in order to coarse adjust the focus.

12. Fine adjustment knob: used fine adjust the focus.

Visit my blog for the next article: theory and application of light microscopy.

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The Digital Microscope - The Microscope Without an Eyepiece

A microscope without an eyepiece is still a microscope. Call it the digital microscope. This unusual piece of microscopy relies on a sensor to give a magnified view of the specimen displayed on the monitor.

Microscopes Have Gone Digital

It is a digital world and microscopes were not spared with the addition of the digital microscope to the stable of microscopes with add-on features. Basically, microscopes have the same parts but the digital camera goes off tangent with a built-in CCD camera.

A CCD or charge-coupled device is a sensor that records images of plant and animal tissues, or microbes that is shown on the monitor screen of the computer via the use of the PC's USB port. The image can be stored in the computer's hard drive for later reference.

The digital microscope uses transmitted light, fluorescence, and phase content to observe plant and animal tissues and microbes. Using the magnification selector, students and scientific or researchers can view the image 25x, 100x, 200x, 400x or 1,000x the original size of the object and the larger the monitor, the larger the on-screen magnification.

In other microscopes, magnification has to be determined by multiplying the magnification capacity of the objective lens by the magnification capacity of the eye piece. Image magnification is one consideration when buying a microscope apart from its use - for hobbies, research, and school laboratories.

Added Advantages

Already sophisticated as it is, work is still being done to improve the digital microscope to the next level. Currently, the microscope offers the best image visibility, and the use of the monitor allows several persons to view the samples at the same time allowing them to observe any changes at the same time. This makes the microscope an ideal educational and research tool.

However, the digital microscope has limitations. Since the monitor screen is essential to accurate magnification, one needs a ten foot screen for an accurate magnification of 200x. The idea centers on the actual magnification offered by the microscope including the expansion size facilitated by the screen on hand.

However, this limitation does not discourage scientific or school research and hobbyists. The microscope is not bulky and can be toted along for onsite research. With a laptop computer, and a USB, one can get to work without any problem. You will be looking at a USB version of digital microscopy. The USB is attached directly to the laptop's USB port and the images can be recorded, saved, and filed the usual way you store files in your computer. It's digital all the way.

Great Use for Hobbies, etc.

The USB digital microscope is useful for studying flat objects. Coin collectors can study every crack and blurred images of old coins with the microscope. Banknotes and old documents can easily be magnified too. Take note; whatever can be studied under the lens of the stereo microscope, can be examined digitally. If you want the regular instrument, just don't demand a digital microscope with an eyepiece. There's none.

Your style and your requirements are considerations when choosing a digital microscope. You need this microscope if you want to observe objects or specimens on a monitor or if you need a microscope out there.

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The Digital Microscope and Digital Technology

The digital microscope is the microscope of this century. It surpasses all previous models of microscopes because it allows the storage of the images of the specimen in different phases for future reference or for simultaneous full- image viewing.

The Microscope Goes Digital

Not everyone can appreciate the definition of digital technology from the viewpoint of an engineer. To simplify the arcane or mysterious language of the digital definition, it simply is the compression of information couched in numerical language so it fits into small storage devices. The entire system is also applied to microscopes. The digital microscope in Toronto stores, supply different models of this kind of microscope from various manufacturers here and abroad.

If the microscope is not hooked to a high resolution video camera and digital recording system, there is no way that researchers can save the images of the specimen.

Saving the specimen images is significant in research because there is no need to do the routine all over again. An important image can be digitally or easily captured and stored for future reference in nano seconds and images can be viewed from different screen monitors in real time making shared viewing possible and convenient.

Dealers of the digital microscopes in Toronto can show you different microscopes suitable for a range of microscopy research needs, including bright field technology. There might be some confusion though about the function of these.

Any microscope without lenses is officially a digital microscope and the compound, stereo microscope, polarized light microscope, trinocular, research and industrial, and so on, with a built-in USB port and matched with an image data base software goes digital.

Hence, if you need an inverted trinocular microscope that's digital, you get it. The digital trinocular microscope can capture still images from its digital camera and the video device provides full-motion live video of tiny specimens. You can find this type of trinocular microscope from distributors/retailers.

The Digital Microscope

The digital microscope in Toronto shops comes with the following components such as the video capturing device, and a video screen. Here's the big difference - common microscopes have no eyepieces; instead specimens are viewed from the video screen which is a 15 inch monitor captured by a 2 million pixel camera.

Microscopes with a USB port and a mount for a digital camera are considered informal digital cameras. Are these good enough? Well, yes. But the digital microscope is outfitted with special microscopic lens designed for the camera.

The digital microscope can give at least 100x magnification though it has a regular depth of field like the regular slide microscope. Because of the digital feature, this microscope makes a perfect tool for creating virtual slides, digital information exchange, education and medical research. It is best used for moving target analysis, 3D displays, and high speed recording.

Experts on the digital microscope in Toronto will however confirm that some have a disadvantage - these need continued supply from a power source and require a computer, which can be an inconvenience. But then some have view screens.

If you are located in Toronto and you need a digital microscope, visit the suppliers or check out their websites for details about the various digital models. How about going digital?

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Why You Need to Service Your Microscope

It is known that the microscope consists of optical and non optical parts. Non-optical parts are composed of parts where you need to adjust their function in the process of service. Meanwhile, in optical parts, there is a process of cleaning the lens in which each lens depends on its magnification. The greater the magnification is, the more the lens layers compose.

The function of microscope is influenced by several things, such as the age of microscope, the intensity of usage, and user behavior. Related to the cleanliness of the lens/ lens focus strength, it depends on the character/ behavior/ type / capacity/ capability/ knowledge and responsibility of someone to use microscope well.

For example is when someone uses a microscope and uses a powerful zoom lens for instance; 400 times/1000 times. Then, the objective lens position will automatically move closer to the object slide of microscope that is mounted on an object table. If the object is fresh or even contains staining, then the dye/ liquid is automatically attached to the objective lens. If the person is knowledgeable and aware about the use of a microscope, he will clean the objective lens with alcohol on lens tissue directly.

The user behavior and the location/ place of storage are also able to cause damage to the mechanic/ optic. The dysfunction of microscope in the mechanics includes the tube of ocular and revolver (the place of objective lens) that always fall, so that the observation is unable to focus.

Meanwhile, the user behavior that causes the lens mold is never clean again (with a lens tissue), especially after using a strong magnification (e.g. 100x objective lens). Microscope which is not placed in cool, dry, dust free and acid free place will influence the growth of fungus on the lens/ microscope optical part. Even, if you place it without silica gel and sufficient lighting.

In conclusion, microscope needs special maintenance for the treatment of its function.

Optical microscope is the simplest of the microscopes. This kind of microscope, often referred to as the "light microscope", is a type of microscope which uses visible light and a system of lenses to magnify images of small samples.However, same as other microscopes, it also needs good maintenance. If you want to know more about it, www.microscopeforsale.org is available for you.

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Tips for buying a quality microscope

To buy a microscope that there are several things to keep in mind. Although the price will always play an important role in a buying decision, it would not be the first thing to look for when purchasing a microscope. A purchase of microscope is a great investment for most people, so you want to get the most out of you money. A common mistake is buying a microscope based on what appears in the image. A microscope may seem interesting, and modern, but is actually very poorly built.

What you will be studying with this microscope is one thing that must be decided before. If you want to study things such as blood, bacteria, algae, or any specimen smaller you want to choose a compound microscope. These specimens require greater power of extension to see all the details. A generally compound microscope has 3 or 4 lens objective that vary in power 4 x 100 x. providing that you are using eye standard 10 x, this will give you 40 x to 1000x enlargement. This is the standard in increase for K-colegio grades. Some cheap made microscopes to claim have until the expansion of 1200X-1400X. These are microscopes to stay away from.

If you want to study in specimens that are larger, such as insects, leaves, and rocks, you want to choose a stereo microscope. These specimens require less extension to view its details. Stereo microscope has at least two eye and provides a three dimensional image outside the specimen you are viewing. Two common forms of stereo microscopes are able to dual and expansion of the zoom. Stereo microscope dual power have two extensions sets, such as 2 x and 4 goals x. provide are using standard x 10 eye, you will receive 20 x and 40 x enlargement. A stereo microscope zoom there is a range of continuous zoom power low at full power. Such a configuration would result continuous zoom from 10 x to x 45.

Now that you have decided what you want to study and what type of microscope is right for you, now is the time to decide on which brand to buy. There are many sources of microscopes in the internet. Insurance and a rule of thumb is to investigate several sites of microscope and trying to find a common brand carried many stores. Many renowned manufacturers do not sell directly to the public, but have legitimate websites where they can be contacted. This will allow you to see that the microscope is backed by a real company in case warranty work is ever needed. Microscopes many could comply with the same specifications, but if you want that this instrument to last will want you to choose a reputable microscope manufacturer.

Metal construction, brass gears, approved electrical and glass optics is a must for any microscope.One way to make sure that you are getting the best quality microscope is to use a reputable supplier. You want to trust that they did their research when they picked the microscopes to be in their product line.