| http://www.w3.org/ns/prov#value | - To distinguish it from lenses, mirrors, prisms or other elements, a new term has been coined and is now commonly used by optical engineers following a paper presented March 19, 1953, before the convention of the Optical Society of America; see Abstract 21, page 238, Journal of the Optical Society of America, April, 1953, vol. 43, No. 4.
|
