发明名称 |
Masking of transparencies for copying |
摘要 |
A transparency to be reproduced is positioned in register with copy material having respective sensitivity maxima in the blue, green and red wavelength ranges of the spectrum. An illuminating unit for exposing the copy material includes an array of cells such as an LCD. The density of each cell can be varied individually to thereby change the illumination intensity, and the densities are adjustable in such a manner that, in the spectral ranges corresponding to the neighborhoods of the sensitivity maxima, the density of each cell changes by approximately the same factor.
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申请公布号 |
US5638153(A) |
申请公布日期 |
1997.06.10 |
申请号 |
US19950433956 |
申请日期 |
1995.05.04 |
申请人 |
AGFA-GEVAERT AKTIENGESELLSCHAFT |
发明人 |
ZAHN, WOLFGANG;JACOB, FRIEDRICH;SCHULZ, EBERHARD |
分类号 |
G03B27/62;G03B27/72;G03B27/73;(IPC1-7):G03B27/80 |
主分类号 |
G03B27/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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