Tuesday, January 27, 2009

What are Compound Microscopes?

Author: Peter Emerson

Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is the stage, with the illuminator below that.

Compound microscopes were among the first magnifying instruments invented. Two Dutch eyeglass makers named Zaccharias and Hans Janssen are credited with making the first compound microscope in 1590 by putting one lens at the top of a tube and another at the bottom of the tube. Their idea was fleshed out by others scientists over the next several centuries, but the basic design remained very similar.

The eyepiece, also known as the ocular lens, is at the top of the compound microscope. It is not adjustable, that is, it only has one strength. Most ocular lenses are 10x, meaning that they magnify objects to ten times their normal size. People look in through the eyepiece through the tube and out through the objective lens.

A compound microscope normally contains several objective lenses. The objective lenses are different lengths, with the longer ones being the strongest. The lenses are situated on a round disk below the tube. Viewers choose which strength lens they want and place it below the tube by turning the disk until the desired lens is in place.

The stage and illuminator are below the objective lens. Specimens are placed over a translucent part of the stage. Light provided by the illuminator shines through the clear part of the stage, making it easier for the viewer to see the magnified details of the specimen. Two adjustment knobs help focus the object on the stage by bringing the lenses and the stage closer together.

Compound microscopes have been around for hundreds of years and are still very useful. A number of scientific disciplines use compound microscopes to discover the wonders of the microscopic world.

About the author: Microscopes Info provides detailed information about electron, compound, stereo, digital, video, and scanning tunneling microscopes, as well as an explanation of the different parts of a microscope, and more. Microscopes Info is affiliated with Business Plans by Growthink .

6 Comments:

At 8:32 AM, Blogger Nimi 1968 said...

nice information.

Science Updates
Web Business
Google Adwords Ads
Greeting Cards
Home Based Business
Niche Collection
Love sms
Bollywood
SEO Search Engine Optimisation
Hiv-Aids Awareness
Adsense Tips

 
At 12:17 AM, Blogger Increase Website Traffic said...

Thanks for the info

Increase website traffic

 
At 12:25 AM, Blogger Winner said...

This comment has been removed by the author.

 
At 12:30 AM, Blogger Winner said...

Thanks for all the info

forex india


india forex

 
At 3:56 AM, Blogger Extreme said...

Very interesting info

Bobsbanter
Bobsbanter
Bobsbanter
Bobsbanter

 
At 4:51 AM, Blogger Extreme said...

Very interesting info..

holytraffic

 

Post a Comment

Links to this post:

Create a Link

<< Home