Document illuminating apparatus using light sources, a, b,...

Details Document illuminating apparatus using light sources, a, b,... Document illuminating apparatus using light sources, a, b,...

G - Physics

02

B

314/28, 240/73,

G02B 26/10 (2006.01) G03G 15/04 (2006.01) H04N 1/024 (2006.01) H04N 1/028 (2006.01) H04N 1/03 (2006.01)

Patent

CA 1292460

Abstract of the Disclosure A document imaging apparatus which is used to illuminate a portion of a document at a scanning line in a scanning plane of the apparatus. First and second light arrays are positioned symmetrically with respect to the optical axis of the apparatus, which optical axis is perpendicular to the scanning line. Each of the first and second arrays includes light sources A, B, and C which are arranged in a periodic, repeating sequence ABCA to provide a superposition of light in both spatial and spectral domains at the scanning line. Light emitting diodes, for example, may be used as the light sources.

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