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By: Ikedi Ani-okoye

too understand the microscope more, thou want to understand it is parts. thou need too know what each bit is capable of.

This article, however, wilt just focus on the lenses system - the entire group responsible in forming the image.

The Eyepiece

Without this part, thee cannot see the specimen being examined. This is by far, amongst the most significant parts of the microscope. This is a cylindrical tube which contains a lens. Stereo microscopes hath two eyepieces, while a compound microscope only has one.

The Objective Lenses

The primary role of the objective lenses is too gather light from the object or specimen being observed. there art several objective lenses in a microscope. each lens varies according to magnification to provide thou with more options for better specimen examination.

Sometimes, special objectives art used for certain examination techniques. The phase contrast - evolved by Frits Zernike - is by far the a lot sophisticated. The phase contrast technique is basically about enhancing contrast. As a general rule, you can easily differentiate 2 specimens or even objects if they hath tall contrast - white is improved seen when set against a black background.

Books and even web articles that explain the phase contrast method seems to technical for this kind of article - one that's focused in explaining the lenses system of the microscope. Still, too give thou an thought on the concept of the phase contrast microscopy, this easy discourse would do:

It's a section hard to have a microscopic visualise of living tissues (such as blood) because most of them are transparent. those kinds of specimen are commonly called phase objects because they do not absorb light - instead, they diffract (to cause the bending of the waves) those. As a result of the bending, the light becomes less seeable (by 1/4 wavelength). Let's not discuss who 1/4 wavelength really substance but comfortably put, it suggests that such a reduced property of light cannot be seen by thine naked eye, not even by a camera.

It is in this context that the phase contrast technique becomes very useful. Somehow, this technique - using special objectives and a condenser - is doable too solve such a problem. It is doable to yield an image that is darker than it is light background.

Other extraordinary objectives art the infinity-corrected optical systems - where the picture distance is set at infinity. these lenses art extraordinary for biomedical and industrial microscopes.

The Nosepiece

As mentioned, a lot microscopes have more than one objective lenses. As such, these objectives need anything to hold them together - and this is where the nosepiece comes in handy.

The Tube

This is the extremely object that holds the eyepiece and the objective lenses - but at an convenient distance. This is responsible for keeping away stray light. While the lenses art already powerful enough, some still prefer too use accessories such as a fluorescent filter. This is done in order too get optimum lighting and for special viewing techniques.

Once again, these parts just refer too the lenses system of a microscope. these are the ones responsible in forming the image of the specimen. thee still want too acquaint yourself with the other parts - such as the illumination system and specimen control too better know how the microscope works.