| 摘要 |
The lamphouse is useful for the production of prints on variable contrast material or on conventional photographic material. A first tungsten filament lamp is provided from which light passes through a first color selective waveband filter. Another tungsten filament lamp is provided from which light passes through a second color selective waveband filter. In the lamphouse there is a removable rectangular light box. The top of the box is covered with a light diffusing and reflecting material. The bottom of the box comprises a rectangular light diffusing screen. The light box has on each of the sides adjacent to the two lamps a light entry port. In the lamphouse there are also two guide members which are parallel to the plane of the screen in the light box and on or in which the two lamps and their filters, guide mounting means and optionally lamphouse abutment means are slideably mounted. In operation a light box is placed in the lamphouse, both lamp and filter combination are then slid in their guides so that each lamp member abuts the light guide box. The position of the light entry posts of each removable light box are so located that when each lamp member abuts the light from each lamp is spread evenly over the whole of the top of the light box.
|
