MICROSCOPE-ANTIQUES.COM © 2013-15.
JAMES SMITH MICROSCOPE ANALYZER AND POLARIZER
Polarized
light was a very useful and interesting way to view objects through the
microscope. The analyzer
is screwed into the bottom
of the draw tube (being placed above the objective) and the polarizer
element is screwed under the stage in some fashion to an adapter, not
now present. The first person generally known to have incorporated
polarized light accessories to a microscope is Henry Fox Talbot around
1834. Calcite crystal prisms are used in the optics of these
accessories to achieve the result and these still work well over 170
years later. It is remarkable that only 6 years after talbots
description this was a standard accessory on James Smith's Best
microscope. Perhaps equally interesting, most illustrations of the
accessories of James Smith's Best Microscope, even years later did not
picture the analyzer or polarizer at all (for instance see Wythes
frontispiece illustration from 1856, in the
first picture in the main web page for this microscope
illustrating Smith's Stand). Although the principals and uses of this
technique are beyond the scope of this website, further information on
the practical and theoretical aspects of this are readily available.