Details of exhibit
- Exhibition:
- 1897 Forty-second Annual Exhibition of the Royal Photographic Society
- Exhibit title:
- Photochromoscope and Stereoscopic Folding Chromogram
- Exhibitor:
- Frederic E. Ives
- Section:
- Apparatus
- Exhibit No.:
- 455
- Description:
- The photochromoscope is an instrument based upon the fact stated by Clerk Maxwell in 1861, that all the colours of the spectrum and all the colours in nature are equivalent to mixtures of three colours of the spectrum itself - red, green and blue. Its construction can be seen from the block herewith, which shows the instrument in section. A B C are red, blue and green glasses respectively, against which the corresponding transparency of the chromogram is placed. D and E are transparent reflectors of coloured glass, while F represents the eyepieces by which the images are examined. Beyond C is a reflector for illuminating the transparency at C. The green image is seen directly through D and E at C, the blue image by reflection from the surface of the glass E and the red image in the same way by reflection from D, so that the eye at F sees the three images superimposed, the arrangement also being a stereoscopic one, yielding relief as well. Exhibit 453 is a similar apparatus designed for use with the Welsbach light. The complete instrument itself is seen in the accompanying figure.
- Exhibit type:
- Photographic equipment and supplies
- Process:
- [Not Listed] ()
- Award:
- none
