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116
The Optical Magic Lantern Journal and Photographic Enlarger.
on B is sent upwards to the reflecting surface c, where it is again subdivided, one portion passing through and into the prism p from which it is reflected to the plate x passing through the | coloured medium kK onits way. The other portion |
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reflector G, and thence to the prism F, by which it is diverted through the colour medium 1 to the sensitised plate x. Thus, it will be seen that the ray spoken of as passing through the one lens reaches three separate and distinct parts of the one sensitised plate, and in this manner three negatives are obtained at one exposure. HI and J act the part of diaphragms. In external appearance this camera, Fig. II., is not unlike any ordinary camera.
From the negatives obtained in this manner
transparencies are made, for the projection of |
which a special lantern fitting or attachment must be used; this fitting can be applied to
almost any lantern with a prolonged baseboard as in Fig. III. The details of this attachment will be seen in the diagram Fig. IV. With this arrangement the rays of light from the lantern
illuminant are parallelised by means of the small |
condenser G, then divided up somewhat after the style illustrated in the camera, thus the one light serves to illuminate and project three slides . by means of three lenses.
The light falling upon the two bundles of
Fig. ITI.
clear glass w and 1 is partly allowed to go
of the ray is reflected from c to the silvered | i left on to the silvered reflectors 3 and xk, so that
through and partly to be subdivided right and
the three rays pass through the three transparencies and coloured screens A B and c, towards the lenses p E and F, by which the pictures are projected on the screen, when the three pictures resolve themselves into one in natural colours. By moving the lever G at
the lenses the three separate pictures in their respective blue, red, and green colours can be projected side by side on the screen. In this case the central lens remains stationary and
Fig. IV.
the two side fronts are slightly separated, at the game time causing the angle of the reflectors x and x to be altered in proportion.
The Photochromoscope Syndicate, Limited,