Microscope Information.
Basics
Basically what a microscope does is to blend light to
create a photographical relief of the cells you are viewing and
in general, if the cells are small,opaque,and nonflourescent, this is probably
the way you want to view them.
Parts
A basic microscope has 13 parts as follows: eyepiece, draw tube, body tube,
revolving nose piece,1-3 objectives, stage, condenser, substage, mirror, base, coarse
adjustment knob, fine adjustment knob, arm, and inclination joint.
Kinds
There are two kinds of microscopes, the compound and the simple
microscope.The compound gives greater magnification and greater resolution
than the simple microscope.
Magnification
The magnification power of a compound microscope is the product of the
magnifying powers of the eyepiece and the objectives.
Theory
The theory of the microscope was first systematically studied by a
German physist Ernest Abbe in the 19th century. Abbe showed that the
resolution (the minimum distance between two points) may be expressed
by the formula, R=^ an.sin a
Objectives
There are three main objectives, classified as to the degree of excellence
of their corrections for the optical errors known as chromatic and spherical
abberation. Chromatic abberation is the phenomenon in which light waves
of different wave lengths are brought to focus at different points along the
optical axis.
Glass Quality
Objectives are made with fluorites or other additives in the glass to improve
color corrections to the point that residual color is almost abolished.
by:
Anthony Harrington
Sources:
Collers Encyclopedia Vol.16
Jenkeu Fu