These Optical Resource Letters are patterned after the materials that have been developed by the AAPT Committee on Resource Letters and previously published in theAmerican Journal of Physics. Since they contain information of direct interest to most teachers of physics, we are pleased to have the permission of theJournal of the Optical Society of Americato reprint them in AJP. The purpose is to provide, in an important field of optics, briefly annotated references that should be of value to teachers, researchers, engineers, and technicians interested in the subject area. No claim is made for completeness or exhaustiveness of coverage; rather, it is hoped that the references quoted will be helpful in themselves and will be representative, or at least suggestive, of the broad literature on this subject. The letter E following an item number indicates that the reference is on a more-or-less elementary level; the letter A indicates an advanced level.The present Optical Resource Letter, OR-2, was prepared under the direction of the OSAAd HocCommittee on Resource Letters: K. M. Baird, H. E. Breed, M. A. Jeppesen, J. M. Stone, and S. S. Ballard (Chairman).Additional copies:Available from the Executive Office of the Optical Society of America, 2100 Pennsylvania Avenue, N. W., Washington, D. C. 20037. Request Optical Resource Letter OR-2 and please enclose a stamped return-addressed envelope.