JPH0713832B2 - Image information input device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is a CCD (Charge Coupled Device).
The present invention relates to an image information input device using a sensor.

(Prior Art) At an approximate post office, an underwriting record of a postal note, etc. is made by using an image processing device such as a copying machine. On the other hand, in order to make it simple, a CCD sensor and an optical sensor are used. Image information input devices using lenses have been developed.

FIG. 4 is a schematic perspective view showing an example of an image information input device using such a CCD sensor.

Reference numeral 1 denotes a CCD sensor, which is fixed to a pulley 3 driven by a drive motor 2 and a conveyor belt 5 which is hung on an auxiliary pulley 4 and moves. Reference numeral 6 is an optical lens, which is an image of the surface of the imaging target 8 on the imaging table 7
An image is formed on the image and the output of the CCD sensor 1 is input as an image signal to an image processing device (not shown). In addition,
The image pickup range is changed by moving the belt 5 by the drive motor 2 and changing the position of the CCD sensor 1. Further, 9 is a support member for supporting the image pickup unit 10 accommodating the CCD sensor 1 and the like, which is fixed on the image pickup table 7 and has a height of the image pickup object 8 on the image pickup table 7.
Within the range of the depth of focus of the optical lens 6
It is designed to be applied to the CCD sensor 1.

(Problems to be Solved by the Invention) Since the conventional image information input device is configured as described above, a thick three-dimensional image pickup object exceeding the range of the depth of focus of the optical lens 6 becomes a defocused image, Therefore, the object to be imaged to which image information is input is extremely thin, for example, a postal letter is a sealed letter, and a three-dimensional parcel postal item has a drawback that it is not an image recording target, and there is a problem in operability.

The present invention aims to solve the above-mentioned conventional problems.

(Means for Solving the Problems) The present invention has the above-mentioned object of forming the image pickup object mounting surface of the image pickup table by glass having a thickness smaller than the depth of focus of a transparent optical lens, and making the three-dimensional image pickup object transparent. This is achieved by making it insertable on the lower surface side of the glass.

(Operation) As described above, the present invention forms the image pickup object mounting surface of the image pickup table with transparent glass thinner than the depth of focus of the image pickup optical lens, and places the stereoscopic image pickup object on the lower surface side of the transparent glass. Since it is configured to be insertable, when inputting image information of a three-dimensionally thick imaging target, it is easy to simply contact the back surface of the transparent glass with the necessary surface of the imaging target while visually observing it. , The surface required for recording of the image pickup object can be surely positioned within the depth of focus of the optical lens, and therefore, even if the image pickup object has a three-dimensional thickness, an image signal without defocus is input. It will be possible.

(Examples) Hereinafter, the present invention will be described with reference to Examples.

FIG. 1 is a schematic front view showing an embodiment of the present invention, and FIG. 2 is a perspective view thereof. Reference numerals not described below in these two figures refer to those in the preceding drawings, and other reference numeral 11 indicates the present invention. It is an object mounting glass due to its characteristic transparent glass.

The object mounting glass 11 is located at the focal point of the optical lens 6, and the CCD sensor 1 is provided at the focal point on the opposite side.
This can change the imaging range by the movement of the belt 5 that can be driven by the drive motor 2.

Reference numeral 12 is a leg member that allows the imaging target 8 to be inserted into the lower surface of the target mounting glass 11. Reference numerals 13, 14 and 15 are a glass receiving metal fitting, a glass pressing metal fitting, and a fixing screw for making the surface of the object mounting glass 11 coincide with the surface of the imaging table 7, respectively.

Since the present invention is formed as described above, when the imaged object 8 having a three-dimensional thickness is to be imaged, it is inserted under the object mounting glass 11 as shown in the figure to input an image. If the required surface is brought into close contact with the object mounting glass 11, the surface of the imaged object is located within the depth of focus of the optical lens 6, and therefore, it is provided at the other focal position of the optical lens 6. The CCD sensor 1 can obtain an image signal of the imaging surface without blurring, which can be surely input to an image information device (not shown).

In the figure, Wa represents the moving range of the CCD sensor 1,
An image signal in the range Wb of the imaged object 8 can be input by the movement.

FIG. 3 shows the range of the focal depth of the optical lens 6 in the part of the object mounting glass 11, showing that the object mounting glass 11 has a focal depth C up and down, and the focal depth C An image can be input on the surface of the three-dimensional thick object 8 to be imaged without blurring. Reference numeral 8'denotes a thin image object.

Although the present invention has been described above, it goes without saying that an image signal can be input by placing a thin imaging target on the target mounting glass 11 in the conventional manner.

(Effect of the Invention) As is apparent from the above description, according to the present invention, the imaging table is formed of the transparent object mounting glass 11 that is thinner than the depth of focus of the imaging optical lens, so that the shape is not limited. , It is possible to easily send the image information signal even if the object is a three-dimensional image pickup object that is thicker than the depth of focus of the optical lens and does not need to be turned upside down. A great effect can be expected when used for inputting image information such as underwriting records of parcel mail.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a sectional view showing the depth of focus of an optical lens in a target mounting glass portion. Is conventional
It is a schematic perspective view showing an example of an image information input device using a CCD sensor. 1 ... CCD sensor, 2 ... drive motor, 3 ... pulley,
4 ... Auxiliary pulley, 5 ... Conveyor belt, 6 ... Optical lens, 7 ... Imaging table, 8 ... Imaging object, 11 ... Object mounting glass.

Claims (1)

[Claims] 1. An image information input device that combines a CCD sensor and an optical lens to input an image of the surface of an imaging object on an imaging table to an image information device, wherein the imaging object mounting surface of the imaging table is the optical lens. An image information input device, which is formed of transparent glass thinner than the depth of focus of the transparent glass, and in which a three-dimensional image pickup object can be inserted into the lower surface side of the transparent glass.