The year 1951 marks the thirty‐fifth anniversary of the Optical Society of America (present membership approximately two thousand), a national organization devoted to the advancement of optics and designed to serve the interests of all those concerned with any of the many branches of this subject. Founded at the beginning of a period of intense activity and vigorous development in the optical sciences, the Society has from the time of its inception been concerned with all aspects of optics from fundamental research to optical engineering and manufacturing.

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