Buying A Phase Contrast Microscope – Be Guided In Your Search
Microscopes nowadays have become important tools in every field of study. Phase contrast microscopes are indeed one of the in-demand microscopes today. When you consider buying one, there are a lot of factors you need to be aware of. Different models and brands offer different features and specific uses. As a result, you may likely be confused on which is really suited for you. Hence, how will you find the one that’s ideal for you? For starters, a guide is the first and likely option that will help you through your search for the right phase contrast microscope. Getting to know the specific details and works of this microscope would allow you to make the appropriate decisions for you. Not only will it assist you in choosing what’s best, but it will also provide you with a deeper understanding on the concepts of this microscope allowing you to use and enjoy it at its maximum.
History of the phase contrast microscope
In microscopy, a phase contrast is a kind of method developed by Frits Zernike,a Dutch physicist in the early twentieth century. He discovered that a person can create devastating interference patterns of an image when the light path is speed up. The patterns formed cause the image to become more obvious against a bright background. Zernike then developed a system of rings which are positioned in the condenser system and the objective lens to create more interference patterns. When these items are lined up correctly, the light waves that reach to the eye of the user becomes out of phase by one-half wavelength. Thus, the image acquired is immensely improved. In 1953, Zernike was awarded a Nobel Prize because his discovery contributed to the advancements made by man in the fields of science.
What a phase contrast microscope is
This typical instrument is extensively used in medical research and cellular biology. It normally examines biological tissues in specimens by making use of the method of illumination which consists a series of light shifting to emphasize a distinction in viewing contrast. As a result, this tool is able to make the user see the components in a bacterium or cell which are very difficult to see when you are using a common light microscope. So, how does it really work? This microscope works similar to a flashlight shining the bottom of a pool. The rays of the light passing through air to the water are slowed down thus, they are being diffracted. It would also make the light out of phase. A light which has become out of phase can be detected by the phase contrast microscope. Its objective is evidently different from that of a normal compound microscope. In a compound microscope, an unstained tissue is naturally translucent so that it only provides a small amount of contrast of the observed specimen. Normally, it is really an inconvenient act to stain the specimen to be observed plus it would only change its biological activities. So that’s why the best tool for this job is through the use of this special microscope in adding more contrast to the images of a specimen.
How a contrast phase microscope functions
Knowing this microscope’s functions is important whether it actually meets your desired purposes. This type of microscope makes use of the fact that the light going through a specimen’s translucent part is slow therefore it is shifted. The out of phase light is invisible to the naked eye however, with a constant increase in the change in phase until reaching to a half wavelength causes a variation in brightness. This allows the translucent specimen stand out in contrast to its surrounding environment
Why a phase contrast microscope is considered a vital instrument
In medical and biological research, this tool is used to study small objects for instance, the cell parts of bacteria, protozoans, and sperm tails which by nature transparent in appearance unless dyed or stained. Although staining is an easy alternative, at the same time, it also halts the activities of the specimen and possibly killing it. The phase contrast microscope makes it possible for people to study and examine living cells. It makes the structures of the specimens visible and still alive.
With more research conducted, it is expected that more microscopes are needed. Buying your very own phase contrast microscope allows you to view your specimens in a bright and detailed way. Now that you are guided accordingly, you will obviously be able to choose the one that suits you best. Experience the marvels of looking specimens under your very own scope.
