首页>
外国专利>
An illumination system for the production of deductions on photosensitive material with sufficient vera, auxiliary contrast, use therein filter strip, as well as the lamp housing containing
An illumination system for the production of deductions on photosensitive material with sufficient vera, auxiliary contrast, use therein filter strip, as well as the lamp housing containing
展开▼
机译:一种照明系统,用于在感光材料上产生具有足够维拉,辅助对比度的演绎,并在其中使用滤光片以及包含
展开▼
页面导航
摘要
著录项
相似文献
摘要
An elongated two-color light-transmitting filter strip of a light- transmitting material has a first zone of its length which transmits light in a first of two mutually exclusive wavebands, a last zone which transmits light in the second of two mutually exclusive wavebands, and a middle zone of the strip having discrete elements which transmit light in the first of the two mutually exclusive wavebands and discrete elements which transmit light in the second of the two mutually exclusive wavebands, the elements having equal areas and being so arranged that there is a progressive change in the transmission of light in the two mutually exclusive wavebands along the middle part of the strip and being so arranged that there is no single line of demarcation dividing that part of the filter which transmits light only in the first of the two mutually exclusive wavebands from that part of the filter which transmits light only in the second of the two mutually exclusive wavebands. An illuminating system comprising this filter strip and a lamphouse in which the illuminating system and filter strip can be used are likewise described.
展开▼