| 摘要 |
PURPOSE: To efficiently irradiate a desired position with light by separately installing a diffusion box and a light quantity adjusting board on plural lamps as a light source, making them function as a single light source and installing a large-sized diffusion box on the light source. CONSTITUTION: The enlarger is provided with a several-thousand watt lamp 1 as the light source, and lamp houses(diffusion boxes) A and B for efficiently irradiating the desired position with light and the light quantity adjusting board 2A are respectively installed on each lamp 1. The light from the lamp 1 is condensed by a cold mirror 2, the central and peripheral parts of the light of the lamp 1 projected on a ground glass plate 6A are made uniform by each angle part 7A of the lamp houses A and B, and the light is reflected by a cold mirror 3 constituted of a plane mirror at a right angle. The light emitted from the lamp houses A and B and having almost the uniform light quantity is made incident on a large-sized diffusion box C through the cold mirror 3, and a film set surface 8 is uniformly irradiated with the light. |
