Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04N
PICTORIAL COMMUNICATION, e.g. TELEVISION
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1/00
Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
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H04N1/024
Details of scanning heads; ; Means for illuminating the original
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H04N1/028
for picture information pick-up
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H04N1/02815
Means for illuminating the original, not specific to a particular type of pick-up head
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H04N1/02885
Means for compensating spatially uneven illumination, e.g. an aperture arrangement
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H04N1/0289
Light diffusing elements, e.g. plates or filters
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