Improvements in colour filters
Номер патента: GB690715A
Опубликовано: 29-04-1953
Автор(ы): Hubert Dennis Cooper
Принадлежит: OLYMPIA FILMS LONDON Ltd
Опубликовано: 29-04-1953
Автор(ы): Hubert Dennis Cooper
Принадлежит: OLYMPIA FILMS LONDON Ltd
Реферат: 690,715. Colour filters. OLYMPIA FILMS (LONDON), Ltd.. Oct. 15, 1951 [Oct. 31, 1950], No. 26521/50. Class 97 (i). A filter for taking the green record in a twocolour additive kinematograph system has chromaticity co-ordinates, calculated for Standard Illuminant A(2848‹ K), lying within an area bounded by straight lines joining points having the following co-ordinates on the Standard C.I.E. rectangular chromaticity chart: x=0.180 y=0.550 x=0.270 y=0.500 x=0.270 y=0.460 x=0.180 y=0.480. The filter may be prepared by the method described in Specification 690,703. The twocolour process may be that of Specification 656,909. Specifications 690,714 and 690,716 also are referred to.
Improvements in colour filters and the method of producing the same
Номер патента: GB690703A. Автор: Hubert Dennis Cooper. Владелец: OLYMPIA FILMS LONDON Ltd. Дата публикации: 1953-04-29.