The Bausch &Lomb Research II was introduced in 1965. The earlier style, the Bausch &Lomb Research I has been in use by many laboratories for over 25 years. Since the capabilities of the older style instrument is relatively well known, basic comparisons of the two instruments arepresented. The instrument was evaluated on the basis of mechanical design, convenienceof operation, optical resolution, performance in all the available illumination modes (bright field, dark field, polarized light, sensitive tint, and phase contrast)) and color photography. Some shortcomings were found and means of coping with some of them were devised. The Research II metallography was found to be a superior instrument in most ways, with the promise of being even better as better lenses are developed and design and assembly bugs are worked out.
[from Advanced Materials, Manufacturing, and Testing Information Analysis Center]
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