microscope consists of the basic elements: eyepiece and objective.They are enshrined in the mobile tube, which is mounted on a metal base.On the same basis set stage.Also in today's microscope often has a lighting system, which allows a better view of the object under study.
lens - is an optical device that projects the image onto the plane.He is responsible for the increase in useful object.Most often, the lens is composed of several lenses.Increased lens approximately equal to the ratio of the optical length microscope the main focal length f of.lens.The increase is always indicated on the lens numbers.The most common objectives when developing the curriculum - x8 and x40.
eyepiece - the microscope is part , which faces the eye.It is
designed for viewing with some increase m image that gives the lens.The eyepiece may consist of two or three lenses.Eyepieces not help to reveal new details of the structure of the object, and in this respect their increase useless.The increase in the eyepiece can be found as well as an increase in any magnifying glass.It is equal to the ratio of the best (that is 25 centimeters) to the main focal length of the eyepiece (f approx.).The most commonly used eyepieces with increase m 7, 10, 15. This is indicated by the numbers on the eyepiece.
To find the optical zoom you will also need the value of σ.This optical length microscope , which is equal to the length between the internal focus lens and eyepiece.
Based on the structure of the microscope , it becomes clear that the object under study is for double the focal length on the other side of the lens.Thus, to determine the increase in microscope possible, knowing increase lens and eyepiece.It will be equal to the product of (N = σ * 25 / f on. * F c.).