Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1977-07-08
1980-09-02
Martin, John C.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358200, 358225, 358901, H04N 110
Patent
active
042209781
ABSTRACT:
The disclosure is of apparatus including a duct-like light guide having an inlet end and an outlet end, light source means at the inlet end, a document at the outlet end, an optical reading system for receiving light reflected from the document, and electronic circuit means for converting the reflected light to electrical signals. Typically, the optical reading system has non-uniform light transmission characteristics, and, with one type of lens system, there is fall-off in intensity at the ends of the system. To compensate for this fall-off, the light source means is designed and positioned to provide a corresponding non-uniform light distribution so that the net effect is a uniform light distribution at the output of the lens system.
REFERENCES:
patent: 3183815 (1965-05-01), Kapany et al.
patent: 3278681 (1966-10-01), Larue, Jr.
patent: 3317738 (1967-05-01), Piepenbrink et al.
patent: 3430057 (1969-02-01), Genahr
patent: 3623810 (1971-11-01), Ogawa et al.
Hurkmans Antoon M.
Rhyins Richard W.
Burroughs Corporation
Coles Edward L.
Feeney, Jr. Edward J.
Green Robert A.
Martin John C.
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