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 Pat Donnelly of the "Montreal Gazette". In 2014, Kooman and his younger brothers, Daniel and Matthew, scouted locations in Cambodia in preparation for the film. Kooman made justice the focus of "She Has a Name"; the social issues that interest him include poverty, the HIV/AIDS epidemic, and the effects of war. The central issues in "She Has a Name" are gender-based. The general topic of the play is human traffickingspecifically the trafficking of children into sexual slavery. Kooman has stated that "She Has a Name" "suggests that justice can only be realized if real people know, care and take informed