Isensee
Description
“The first patent that has been found was granted to H. Isensee and he placed in front of the lens, both in taking and projection, a rotary shutter with three 120 degrees sectors in the usual colors.”
(Wall, E.J. (1925): The History of Three-color Photography. Boston: American Photographic Pub. Co.: pp. 584.)
“The earliest patent is that of H. Isensee, of Berlin (D.R.P. 98,799, Dec. 17, 1897). He says: By means of this invention the projection images should appear to the eye of the observer in natural colours by means of the images being projected rapidly one after the other and in regular sequence in the colours red, green, blue. For this purpose there is placed eccentrically before the objective a disc with three
sectors of red, green and indigo-blue glasses. From the negatives, positives are made, and projected by the series apparatus.”
(Klein, Adrian Bernhard = Cornwell-Clyne (1940): Colour Cinematography. Boston: American Photographic Pub. Co.. 2nd revised edition, on p. 5.)
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Source: D.R.P. 98,799, Dec. 17, 1897
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Credit: Illustration by Sarah Steinbacher, Multimedia & E-Learning-Services, University of Zurich. Source: D.R.P. 98,799, Dec. 17, 1897
Original Technical Papers and Primary Sources
D.R.P. 98,799, Dec. 17, 1897
Secondary Sources
Klein, Adrian Bernhard = Cornwell-Clyne (1940): Colour Cinematography. Boston: American Photographic Pub. Co.. 2nd revised edition, on p. 5. View Quote
Wall, E.J. (1925): The History of Three-color Photography. Boston: American Photographic Pub. Co., pp. 584.
Downloads
Original patent D.R.P. 98,799, Dec. 17, 1897.
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