CONTRAST CONTROL DEVICE FOR A SLIT TYPE COPIER EXPOSURE SYSTEM

摘要

An original document exposure device has means (12) for supporting an original (14). A slit exposure system illuminates a slit area on the original and includes a light source (16). Reflected exposure light from within a field of view of the original is directed toward a photosensitive medium (22). Relative motion is produced between the original and the exposure system to scan the exposure light and the field of view over the original. Reflector means (28) receive and diffusely reflect a portion of the exposure light. Adjustable positioning means position the diffuse reflector between the exposure system and the original to control the degree of bump exposure. IMAGE