Diaphragm (optics) 1889 "Dictionary of Photography" (see figure), but disappeared after Ernst Abbe's theory of stops unified these concepts. According to Rudolf Kingslake, the inventor of the iris diaphragm is unknown. Others credit Joseph Nicéphore Niépce for this device, around 1820. Mr. J. H. Brown, a member of the Royal Microscopical Society, appears to have invented a popular improved iris diaphragm by 1867. Kingslake has more definite histories for some other diaphragm types, such as M. Noton's adjustable "cat eye" diaphragm of two sliding squares in 1856, and the Waterhouse stops of John Waterhouse in 1858. Diaphragm (optics) In optics, a diaphragm
She Has a Name rape scene as an actor. The premiere of "She Has a Name" was produced by Burnt Thicket Theatre in partnership with Raise Their Voice. The office of Joy Smith, MP for Kildonan—St. Paul, released a statement advertising the premiere of "She Has a Name". The premiere took place at the EPCOR Centre for the Performing Arts in Calgary in February 2011. Performances were scheduled to run on the centre's Motel stage between February 23 and March 5. Tickets quickly sold out. Four days after the premiere, Burnt Thicket Theatre moved the play to the Scott Block Theatre in Red Deer,