Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1997-06-23
1999-03-02
Tso, Edward H.
Facsimile and static presentation processing
Facsimile
Recording apparatus
359634, G02B 2714
Patent
active
058778667
ABSTRACT:
In a color image readout apparatus in which white light is separated into three primary color light components of B, G, and R by means of a beam splitter, predetermined wavelength cut filters are disposed between dichroic mirrors and between a dichroic mirror and a reflection mirror in the beam splitter, so as to prevent unnecessary reflected light components such as multiple reflection light from occurring, whereby a favorable color image is obtained free of color contamination, flare, and ghost. A beam splitter 7 is constituted by a first dichroic mirror 21 for reflecting a B light component in the white light, a yellow filter 22 (cutting off a wavelength of 500 nm and thereunder), a second dichroic mirror 23 for reflecting a G light component in the white light, an orange filter 24 (cutting off a wavelength of 580 nm and thereunder), and a total reflection mirror 25 which are laminated in this order. The yellow filter 22 absorbs the B light component and, of the G light component, a wavelength range component in the vicinity of the wavelength range of the B light component, which may cause color contamination and multiple reflection light, whereby color contamination, flare, and ghost are prevented from occurring due to multiple reflection.
REFERENCES:
Jap. Unexamined Pat.Pub.No. 221930, Aug. 18, 1995, Japan and English Language Abstract, "Color Image Reader".
Snider Ronald R.
Toatley , Jr. Gregory J.
Tso Edward H.
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