Introduction to microscopes:

• Compound microscope was developed at the beginning of 1660's by Janssen brothers and Galileo.

• This early microscope suffered from chromatic (and spherical) aberration, and images were blurred and had colored halos.

Figure 9.03: Photograph of Zacharias Janessen and Hooke microscope [1].

• Improvements: 1700 and 1800's - great improvement in microscopes

• Usually brass was the alloy of choice for the production of high-quality microscopes. But expensive.

• Tripod types structure was used to provide sturdy support for the microscope. This was considered one of the most advanced of its period.

Ref.[1]. http://inventoradil.blogspot.in/2012/06/compound-microscope.html.