OPTICAL TECHNIQUES FOR ELECTRON PROBE ANALYSIS.
NAVAL RESEARCH LAB WASHINGTON D C
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This study is concerned with two techniques in optical microscopy which exploit the principle of light interference to enhance optical contrast in metallurgical specimens. The first method achieves this through interference layers formed within the specimen by anodization in an electrolyte. A variety of experimental arrangements are suggested for carrying out the anodization. It is also noted that the optical effects of anodization can be adjusted by overlaying the specimen with films of nitrocellulose. The second method produces optical contrast through interference layers formed by replicating the etched-out surface of the specimen. This latter technique has the advantage of being applicable to any specimen which can be etched, and it is not limited to anodizable species. Here too, the optical results of replication can be adjusted by exposing the replica to the vapors of its solvent. Author