03982116 is referenced by 28 patents and cites 7 patents.

In an electrostatic copying machine, an original document is scanned by moving an original document over an illuminated slit. The system for illuminating the slit comprises an elongated light source and a first elliptic cylindrical mirror having a focus coincident with the axis of the light source to reflect light from the source into the slit. A second elliptic cylindrical mirror has a focus common with the first mirror and reflects light from the source parallel to the slit. A plane mirror reflects the light reflected from the second mirror into the slit.

Title
Slit illumination system for copying machine
Application Number
5/602045
Publication Number
3982116
Application Date
August 5, 1975
Publication Date
September 21, 1976
Inventor
Nobuo Sakuma
Tokyo
JA
Agent
Frank J Jordon
Assignee
Ricoh
JA
IPC
G03B 27/54
G03B 15/02
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