Duplicator for multiplying of photographic slides - has projector with flicker tubes illuminating slide by stabilised light source

摘要

Duplicator for multiplying of photographic slides. The slide is fitted in a mask above the filter tray with a diffusion filter. There is a photo cell above the slide, fitted behind a diffusion pane in a photo cell holder. The setting light is mounted on a reflector plate which can be moved in the upward and downward direction, along guide rods. The light transparency of the slide is a function of the covering. The slide projector consists of several flicker tubes which illuminates the slide by an accurately stabilised light source. Before the take the slide is illuminated by a setting up light to check the intensity which can be adjusted by a knob.