JPS61134168U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the optical system of the reading device according to the present invention, Fig. 2 is a bottom view of the document table, Fig. 3 is an enlarged sectional view taken along the line - - in Fig. 4, and Fig. 4 is an illustration of the electrical system. A circuit diagram, FIG. 5 is a schematic diagram of changes in both signals during reading scanning, FIGS. 6 and 7 are perspective views and front views showing another embodiment of the present invention, and FIG. 8 is a diagram showing still another embodiment of the present invention. FIG. 9 is an explanatory diagram showing the optical system of the embodiment shown in FIG. DESCRIPTION OF SYMBOLS 1...Original mounting table, 2...Original, 3...Light source, 7...Lens, 8...Spectroscopy means, 8...Reading part, 10...Reference reflection plate for white balance.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An imaging optical system that includes a document table on which a document is placed, a light source that illuminates the document on the document table, and a lens that forms an image of light reflected from the document. and a reading means for reading the image formed by the imaging optical system as optical information divided into at least two colors and converting it into electrical output, wherein the color document reading device is provided with a light source and the document mounting table outside the effective document reading range, A reference reflecting member for white balance is provided between the reference reflecting member for white balance, and the output level of the electric circuit for each spectral color is corrected based on the output from the reading means based on spectral information from the reflected light of the reference reflecting member for white balance. A color document reading device featuring: (2) The color document reading device according to claim 1, wherein the reference reflection member for white balance is provided on a surface of the document placement table opposite to the document placement surface. (3) The color document reading device according to claim 1, wherein the reference reflection member for white balance is attached to a light source or a member supporting the light source. (4) The color document reading device according to any one of claims 1 to 3, wherein a transparent protective film is provided on the light source facing surface of the reference reflection member for white balance.