首页>
外国专利>
Illumination device for photographic enlarger - series of lights in parallel to negative are selectively used for illumination levels
Illumination device for photographic enlarger - series of lights in parallel to negative are selectively used for illumination levels
展开▼
机译:摄影放大机的照明装置-与负负平行的一系列光被选择性地用于照明水平
展开▼
页面导航
摘要
著录项
相似文献
摘要
An illumination device for a photographic enlarger unit consisting of a large number of lights which can be selectively turned on or off has the lights (16) arranged in one or more planes roughly parallel to the negative plane to produce an uneven level of illumination across the negative (27) matched to the transmissivity of the negative (27) itself. The requisite distribution and pattern of lighting for the negative is produced by means of a projection of the negative onto the projection table (13) prior to the actual exposure of the negative onto photographic material.
展开▼