| 摘要 |
A light-modifier for changing the character of light flowing from a light source towards an image forming sheet and a sheet of light sensitive copy in an exposure device includes a roll of thin, flexible light-modifying plastic sheet material which is rotatably mounted for rolling and unrolling on a roller to extend between a first light-intercepting unrolled position extending outwardly between said image forming and copy sheets on the one hand and said light source on the other hand and a second, rolled-up position offset from the copy sheet. The apparatus may be made for sale as an accessory or optional item for a wide variety of existing exposure devices whenever it is desired to change the character or form of the light energy by diffusion, filtering or attenuation, and the apparatus may be directly incorporated as an integral part of a new exposure device.
|
