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 six years. The drama centers on Jason's infiltration of a brothel ring that is trafficking girls into Bangkok. Jason comes to believe that Number 18 could be a key witness to a human trafficking incident and tries to gain her trust and persuade her to testify against the ring. The victimized child in the play is known only by the number 18 to reflect how traffickers often dehumanize their victims by giving them a new name or simply a number, which in some cases is branded onto the victim's body. Waldschmidt said he hoped that "She Has a Name" will