JPH0435153A - Image reader - Google Patents

Abstract

PURPOSE:To simplify the adjustment and to send a read original image to a host computer in an optimum state by incorporating a real time monitoring display device for lighting or focus adjustment to the reader. CONSTITUTION:A CCD linear image sensor in a camera head section 3 picks up an image of an original on an original platen 1 through a lens 4 by subscanning and the image is displayed on a liquid crystal display monitor 8 in real time. When a problem in the lighting exists in a displayed image, a fluorescent light 2 is immediately lighted and an aperture ring of the lens 4 is adjusted and the light storage time of the CCD linear image sensor is changed by the operation of an operating panel 7. After each adjustment is finished, the image of the read original is sent to a host computer via an interface 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image reading device using a COD linear image sensor or the like.

[Conventional technology]

FIG. 2 is a perspective view showing a conventional image reading device of this kind. In the figure, 1 is a document table on which a document to be read is placed, and 2 is a fluorescent light that illuminates the document table 1 with adjustable illuminance. , 3 is a camera head with a built-in OOD IJ near image sensor, 4 is a lens that collects the image of the original on the document table 1 and transmits it to the OOD linear image sensor in the camera head section 3, and 5 is a camera head section 3 An adjuster 6 is an interface unit disposed between the camera head unit 3 and a host computer (not shown).

In this conventional device, in the camera head section 3, the O.
The OD linear image sensor is sub-scanned to image the original placed on the original platen 1 through the lens 4, and the image data is transmitted to the host computer via the interface 6. As a result of the transmission, if the image is dark, adjust the illumination of the document surface with fluorescent lamp 2 and adjust the aperture ring of the lens, and if the image is not in focus, adjust the focus ring of lens 4. Adjust the focus by adjusting the device 5 or the like.

[Problem to be solved by the invention]

Conventional image reading devices are configured as described above, so unless you transmit the image data to the host machine and display it in some way, or (1) use a separate finder etc. There were problems such as the inability to adjust the lighting and focus, which required a lot of time, and the adjustment process itself was unnatural and difficult.

The present invention has been made to solve these problems, and it is an object of the present invention to provide an image reading device that can perform illumination adjustment and focus adjustment in a natural manner and in real time.

[Means to solve the problem]

The image reading device according to the present invention irradiates the original on the original table with light by the illumination part, optically reads the original by the original reading part and converts it into an electrical signal G, and displays the original as an image by the display monitor. This is how it was done.

[Effect]

The image reading device of this invention conveys information regarding the illumination and focus of the image read by the document reading section to the operator via the display monitor before transmitting the image to the host machine, making it possible to adjust the transmission signal in front of the vehicle. I have to.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

That is, in FIG. 1, numeral 7 is an operation panel that is provided continuously on the document table 1 and adjusts the light accumulation time of the OOD image sensor, and 8 is an operation panel that is provided integrally with the operation panel 7 and is used to control the OOD linear image inside the camera head section 3. This is a liquid crystal display monitor that displays images captured by a sensor in real time.

The rest of the structure is the same as the conventional one shown in FIG. 2, so the explanation will be omitted.

With this configuration, the COD linear image sensor in the camera head unit 3 scans the document platen 1 by sub-scanning.
An image of the upper document is captured through a lens 4, and the image is displayed on a liquid crystal display monitor 8 in real time. If there is a problem with lighting in the displayed image, you can immediately turn on the fluorescent lamp 2, adjust the aperture ring of the lens 4, and even use the operation G on the operation panel 7 to turn on the OO.
The problem is solved by changing the light accumulation time of the D linear image sensor, and if there is a problem with focus, the focus ring of the lens 4 is adjusted to bring it into focus.

After completing each of these adjustments, the read image of the original is transmitted to a host computer (not shown) via the interface 6.

In this embodiment, the display monitor 8 uses a liquid crystal device, but a plasma device or an E
An L device may also be used.

〔Effect of the invention〕

As mentioned above, the image reading device according to the present invention incorporates a real-time monitoring display for adjusting illumination and focus, so adjustments can be easily made and the image reading device can host the scanned document image in the optimal condition. 0 that can be transmitted to the computer

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing a conventional image reading device of this type. In the figure, 1 is a manuscript table, 2 is a fluorescent light, 3 is a camera head,
4 is the lens, 6 is the interface part, 7 is the operation panel, 8
is an LCD display monitor. The same or similar symbols indicate the same or corresponding parts.

Claims (1)

[Claims] A document table on which a document to be read is placed, a lighting section that illuminates the document on the document table, a document reading section that optically reads the document and derives an electrical signal, and an output signal of the document reading section. An image reading device equipped with a display monitor that receives and displays an image of the original.