Traveling microscope

The precision is such that better-quality instruments have measuring scales made from Invar to avoid misreadings due to thermal effects.

It is used in laboratories to measure the refractive index of flat specimens using the geometrical concepts of ray optics (Duc de Chaulnes’ method).

This mechanical instrument has now largely been superseded by electronic- and optically based measuring devices that are both very much more accurate and considerably cheaper to produce.

A travelling microscope consists of a cast iron base with machined-Vee-top surface and is fitted with three levelling screws.

For holding objects a horizontal stage made of a milki[check spelling] conolite sheet is provided in the base.

A traveling microscope. E— eyepiece , O— objective , K—knob for focusing, V—vernier, R—rails, S—screw for fine position adjustment.