Microscopes For Biological Research

Microscopes are essential devices in the field of scientific research. With the help of microscopes designed for biological research, analytical studies can be carried out with enhanced efficiency and accuracy.

Superior Models Available in the Industry

Understanding the specific requirements of researchers, a variety of advanced models of microscopes that can be used for performing diverse biological studies are offered by renowned manufacturers including LW Scientific, Unico and others. The popular models include Revelation III-S Semi-Plan Trinocular with Eyepiece, M5 INFINITY LabScope Plan Trinocular, M220FL Monocular Microscope - Fluorescent, and M250 Binocular Microscope among others.

Designed with Innovative Features

To ensure the users effortless operation, microscopes designed for biological research applications are integrated with a range of advanced features. These include:

? Five position nosepiece

? 10 X/20 high point plan eyepieces (enables easy viewing of large specimen areas)

? Parallel optical path for better clarity

? 50-75 mm interpupillary distance range

? Binocular head objectives

? Fine adjustment range of 22μm

? Coarse adjustment range around 20 mm

? Tension adjustment knob

? 4x, 10x, 20x, 40x, 100x infinity plan objectives

Microscopes for biological research are provided with portable NA 1.25 Abbe condenser, halogen light, Iris diaphragm, dual slide holder and stage locking lever. Most of them come with accessories including spare bulb, blue, green, yellow filters, 2 amp fuse, immersion oil, dustcover and operation manual. Further, the manufacturers provide one year warranty for electronic components and life span assurance for materials and workmanship as well. These microscopes are obtainable in numerous sizes varying in length, width, height and weight measurements.

Buy the Best from Competent Dealers

When buying microscopes for your biological research laboratory, it is essential to find competent and experienced suppliers in the field. Such dealers can provide you complete technical support and assistance in buying the perfect model satisfying your unique requirements and budget.

Block Scientific is the affordable source of fine Medical Laboratory Equipments. We stock high quality branded microscopes including Biological Research Microscopes.

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.

Fabio L. C. Pacheco invites you to visit Microbiology Online. If you liked this article, you will also enjoy Microbiology Online. It's all about great tutorials in industrial microbiology, focusing on pharmaceutical microbiology labs.

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Some Things You Should Know About Dissecting Microscopes

Dissecting microscopes are used for examining small organisms, fine dissection work and demonstration. You cannot use them to examine biological samples like cells. They are generally used to view larger samples and usually have a magnification power of less than 100x. The parts of this type of microscope include an eyepiece, a tube, a knob for adjusting magnification and focus, an arm, auxiliary lens, a stage plate and the base. The specimen is kept on the stage plate to be viewed.

These are usually used in schools for educational purposes. They can also be found in biological or research laboratories for examination and demonstration purposes.

The Parts

The tube of the microscope has an eyepiece on the top fitted with a lens to look through. There will also be a nose piece to support your nose in order to keep your head steady while using it. There is an objective lens at the bottom part of the tube. You will have to fit an objective lens depending on the type and size of the specimen you wish to view. You have to fit them depending on the sharpness of focus that you will need. You will need to use a finer focus for really small specimens.

There will be two more lenses in the condenser. These are light condensing lenses and are required to adjust the magnification of the microscope. The condenser is placed above the stage of the microscope. The stage is where the slide with the specimen is placed. The stage should be an adjustable one which can be maneuvered without you having to remove your eyes from the eyepiece.

The stage is placed above the diaphragm. The diaphragm controls the amount of light falling on the specimen. The light can either be transmitted from below the stage or above. It could be of many types but the fluorescent type is the best as it emits more light and less heat. You are able to see the magnified image of the specimen due to the manipulation of the light's reflection on the specimen.

Taking Care Of Them

All microscopes need to be handled with care and stored carefully. Dissecting microscopes need to have their lenses cleaned on a daily basis with a soft cloth so that they remain smudge and dust free. You should not allow any dampness to come on them so they should be kept away from water. Whenever you are not using them, you should keep them covered with dust covers. Microscopes need to be kept spotlessly clean. Any speck of dust on the lens can affect their proper functioning.

You must be very careful when picking up and carrying a microscope. It is imperative that you hold it with both hands. This way you can avoid bumping it into things or dropping it. If you drop it, the alignment of the stage and lenses can get ruined. Microscopes can be rather expensive so it is better to take proper care of them so that you can use them for much longer. You can get different accessories for microscopes. The best thing to do is to buy a case in which you can store the microscope and its accessories so that they do not get dirty or damaged.

I hope you found this article helpful! To discover essential advice for buying microscopes for children, and to uncover the little-known steps involved in changing a microscope light bulb, then be sure to check out: http://www.MicroScopesGuru.com/

Student Microscopes

Student microscopes are small and inexpensive light microscopes. Student microscopes are a must for schools and educational establishments that have any kind of science on its curriculum.

Compound microscopes are the usual microscopes used for teaching. There are many types of these microscopes, but the most used one has dual eyepiece for viewing by two students or student and teacher. Student stereo microscopes are a bit more expensive and give three dimensional images. These are great tools for viewing all sorts of specimens and are useful for students of higher levels, who need specific studies.

Student microscopes have user-friendly designs with a mechanical construction designed to withstand vigorous, everyday classroom use. Most microscope models feature high quality DIN standard optics and anti-tamper safety features including locked on eyepiece and stage clips. Most student microscopes also have slip clutch on the coarse focus movement to prevent over focusing and an adjustable focus stop to prevent damage to glass micro-slides and objective lenses.

All student microscopes will not have the same standard; there are some basic, less expensive microscopes for younger students and advanced and more expensive models for higher grades. Most student microscopes have a selection of objectives, often two or three, having 10X and 40X lenses. Thus the usual magnification power ranges form 100Xto 400X. But in some with third objective of 100X, the magnification power goes up to 1000X. The lighting systems may vary between less inexpensive Tungsten bulbs, more expensive fluorescent lights and halogen lamps.

Purchase student microscopes only from specialist microscope suppliers. As there is an increased chance of damage because of inexperienced hands, always purchase from a provider who offers good repair service. Purchasing in bulk quantities often gives large reductions. Bargain with the companies to reduce their price. Try to sign an agreement with a company that will give you discounts for fixing and maintaining your educational microscopes while keeping costs as low as possible, and reductions for every additional purchase. Always look for offers of free shipping.

Microscopes provides detailed information on Microscopes, Electron Microscopes, Parts of a Microscope, Compound Microscopes and more. Microscopes is affiliated with Reverse Osmosis Water Filter.

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Telescopes For Astronomy - Help in Choosing the Right One Using Simple Mathematics

The most important thing that needs to be considered before purchasing any telescope, especially if you are new to astronomy, is what you are going to use the telescope for. With this in mind, it is not always obvious that the physical properties of a telescope should be closely related to your requirements.

Two of the most important parameters associated with astronomical telescopes are the aperture (the diameter of the main objective lens or mirror) and the focal length (the distance from the objective lens or mirror to the point where the image is formed). With a little simple mathematics, you can easily calculate the values of these parameters to help you choose the best telescope for your needs.

Telescope Aperture

The telescope aperture is representative of what is usually described as the physical 'size' of the telescope. The bigger the aperture, the more light gathering ability the telescope has. For example, a recommended aperture for a really useful first telescope would be at least 100mm for a refracting telescope, or 150mm for a reflecting telescope. Using these figures, we can then calculate how faint an object an observer would be able to see:

The entrance pupil of the human eye can reach approximately 8mm in diameter when fully adapted to the dark. This is equivalent to an area of 50 square millimetres (50mm 2). The refracting telescope having an aperture of 100mm in diameter has an area equivalent to approximately 7850mm 2.

The 100mm aperture telescope is therefore capable of collecting 7850/50 = 157x more light, which is then available through the telescope eyepiece. In other words, looking through the telescope will enable an observer to see objects which are 157 times fainter than could be seen with the unaided eye.

Following the same calculation, the 150mm aperture reflecting telescope would enable the same observer to see objects which were 353 times fainter than could be seen with the unaided eye.

Clearly then, if you want to observe faint star fields or galaxies and nebulae, then a bigger telescope aperture is certainly better. If you have a particular object in mind which you would like to see, then knowing how faint it is should allow you to then 'work backwards' with the above calculation, to determine if the telescope you have would be suitable.

Telescope Focal Length and Magnification

The focal length of the telescope is representative of either the physical 'length' of the telescope, or its optical configuration. A short focal length will give a wide field of view (the area of night sky that can be seen), with the objects in that field of view appearing small, whereas a long focal length will give a narrow field of view, but with the objects appearing larger.

The magnification of the telescope is the result of a combination of the focal length of the telescope itself, and focal length of the telescope eyepiece. A telescope of a certain focal length will produce an image of a certain size, which is fixed and will not vary. The eyepiece, effectively used as a microscope, then views that image. A larger image to start with allows the eyepiece to produce a higher magnification. So, by changing the eyepiece, the magnification of the telescope can also be changed.

For example, a recommended focal length for either a refracting or reflecting telescope would be at least 1000mm.

Using this figure, we can then calculate the following:

An eyepiece of long focal length, say 25mm, will produce a magnification of 1000/25 = 40x.

An eyepiece of short focal length, say 10mm, will produce a magnification of 1000/10 = 100x.

Using the same calculation, the same eyepieces used on a telescope having a focal length of 1500mm would give magnifications of 60x and 150x respectively.

Telescopes with long focal length are ideal for observing the craters on the moon or the features of the brighter planets.

About the author:

Steve West is a systems engineer, astrophysics graduate and lifelong enthusiast for all things to do with space. For more advice on telescopes, telescope accessories and educational gadgets including home planetariums, visit: http://www.squidoo.com/telescopes-for-sale

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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.