Microscopes

1.Eyepiece or ocular- upper optical component that further magnifies the primary images and bring the right rays into focus.

2. Draw tube- it is the cylindrical structure which is used to support the eyepiece.

3. Body tube- connects the ocular to the objective lenses.

4. Coarse Adjustment Knob- It moves the tube up and down to magnify the

specimen.

5. Fine Adjustment Knob- It adjusts the focus slightly, to make the image clear.

6. Arm- basic frame to which the base, body and stage are attached and acts as a

connector between the base and the head of the microscope.

7. Stage- Table of the microscope where the glass slide is placed and helps in

supporting the specimen and helps you to keep the specimen on the

correct location.

8.Stage Clip- The stage clip hold the the specimen slide firmly on the stage and is

needed if the microscope is tilted.

9. Glass Slide- is the place where specimen is place to view in the microscope.

10. Inclination Joint- It allows one to tilt the upper part of the microscope so that

you can view the specimen while seated.

11.Base- it helps in supporting the microscope and contains the illuminator.

12.Diaphragm- it controls the amount of light that passes through the stage and,

consequently, through the specimen.

13.Dust Shield- It protects the objectives from dust.

14.Revolving Nosepiece- This is the part that holds two or more objective lenses

and can be rotated to easily change power.

15.Objectives- it gathers light from the sample or object under study.

16.Mirror- is used to focus light up through the hole in the microscope's stage,

or slide platform. The slides will contain a thin slice of material

through which the light can shine, to reveal the internal structure of

the sample.

17.Mirror Rack- holds the mirror in place.

Blue light

has the shortest

wavelength

of the visible spectrum. The shorter the wavelength, the higher the resolution one can achieve with a

light microscope

.

The resolution using only blue light is about 4 times better than with using all the wavelengths of visible light.

microns are a much smaller unit, and microscopes are usually used to see microscopic things.

1 mm = 1000 microns

Simple Answer:

Antonie (Anton) van Leeuwenhoek made innovations to the simple microscope with a single lens. His microscopes received no special name and were enhancements of the "simple microscope."

Anton van Leeuwenhoek always referred to his instrument as a Vergroot-glas, which translates into magnifying glass.

He also enhanced the overall design of the simple microscope and specimen holder. He constructed at least 25 different designs of the simple microscope. (He rarely used the compound microscope which had been invented 40 years before his birth because his simple microscopes had far greater magnification.)

More:

Though Anton van Leeuwenhoek did not invent the microscope, he did make a great discovery. About 1670, he found that he could form tiny glass beads that were nearly perfect spheres and also capable of high magnification when used in a simple microscope. Indeed, his little glass spheres could magnify an object 250 times (perhaps more), about ten times better than the best compound microscopes of the day.

Beyond the discovery of the methods for making small spherical lenses, van Leeuwenhoek also built microscopes and experimented with their design, addressing the difficult problems of illuminating, holding and viewing the specimens.

He made over 500 optical lenses, though they did not necessarily go into 500 different microscopes. The microscopes themselves were expensive and time consuming to construct, but records indicate possibly as many as two hundred were made. In this process he is said to have created at least 25 variations on the basic design of the microscope.

Only nine of his microscopes are known to exist today.