JPS5843658A - Optical reader - Google Patents

Abstract

PURPOSE:To make a device small-sized and simple, by moving a rectangular scanning body for scanning along an original, and reading a picture image of the original. CONSTITUTION:Light sources 17, 18 for irradiating an original, solid image pickup elements CCD24, 25, and optical elements 20-23 such as a mirror, a lens, etc. for refracting a picture image of an irradiated original and image-forming it onto the solid image pickup element are stored in a rectangular case, of which a rectangular scanning body 2 is constituted. When it is moved for scanning along the original, the picture image of the original can be read.

Description

[Detailed Description of the Invention] The present invention reads images] An optical system that converts images into electrical signals
Regarding the t-mounting device, in particular, a small and simple optical image as
p device.

Conventionally, facsimile machines, image transmission devices, etc.
A digital picture book 11 for reading the picture 11' and converting it into an electrical signal and transmitting the picture! Although there are IIIL devices, when reading images, most of them are dedicated to sheet-like originals. Image manuscripts are also increasingly being used. Therefore, there is a need for an iii* reading device that can be used not only for sheet image originals but also for book shadow image originals.

The purpose of the present invention is to use KI! which is convenient not only for reading sheet-like NAs as described above but also for reading manuscripts such as books! It is an object of the present invention to provide a small-sized and simple optical reading device that can be used for any purpose.

The optical reading multi-device according to the present invention houses a light source for irradiating an original II, a solid-state image pickup device, an optical element for making an image of the irradiated nine originals on the image pickup device, etc. in a rectangular case, and performs rectangular scanning. The document image is read by moving and scanning along this rectangular scanning body tXS.

The present invention will be described in detail below with reference to the embodiments shown in the drawings.
l! I will clarify.

Figure 1 shows an embodiment of the optical reading device according to the present invention, and in the figure, the main body of the device is indicated by 2 mirrors lIl.

2 shows a rectangular scanning body in which parts such as a light source for irradiating the original, a solid-state image sensor, and an optical element for forming an image of the irradiated original on an image element are housed in a rectangular case. , by moving and scanning this rectangular scanning body along the document), the document image is read.

In the illustrated embodiment, the scanning body 2 is capable of scanning movement as a rail 3.4t guide inside the main body 1, that is, it is capable of reciprocating movement in the direction indicated by arrows 1 and 1.

';'' 1:: The bearing 5 is fixed and the bearing is good.
On the rails 3 and 40, there is an elastic original plate 9, on which the original 10 of the book cover is placed.In order to hold the original 10 on the original plate 9, Hara'jf
A document holding plate 13 composed of an AT lath 11 and an original f lath support plate 12 is mounted, and a bearing fixed to the document glass support plate 12 is mounted so that a plate 14.15 is rotated so that the rail 4 is centered , the document holding plate 13 rotates. This original holding plate 1
3 is closed on the document table 9 to hold the document 10 during document scanning, and can be opened and closed only when the scanning body 2 is in the fixed position shown in FIG. 1, and the document can be inserted and replaced in this position.・Figure 2 shows the details of the scanning body 1llt, which shows the original t
An illumination rung 17.18 with a reflective shade that acts as a light source that emits light, and a solid-state image sensor CCD 24.25.
The image of the illuminated document is refracted and the image sensor Ao'KM*
i5i, Sono, 2-2°, 21 and 9. s”m 2,
2 s□, &□. This is a rectangular scanning body configured by being housed in a cage 82a. This has a structure in which a document placed facing upwards is scanned from above, and the document image illuminated by illumination rungs 17 and 18 with a reflective shade 16 is illuminated by the reflective shade. After exiting the slit 19 and passing through a fixed image 20.21'i, it is reduced to a solid-state image sensor CCD 24.25 by a lens 22.23. In the illustrated example, the solid-state image sensor CCD 2
4 and 25 are used, but currently solid-state image sensor C
The number of solid-state image pickup devices CCD is set depending on the relationship between the number of bits of the OD, the resolution of the image, and the like to be read. Assuming that the number of solid-state image sensors CCDs is t'Ns, the number of solid-state image sensors CCDs is n1, the document reading width is 11, and the resolution R is R, the relationship is NXw&≧BXR.

In the above example, the solid-state image sensor COD (D-specific pit number 1
728 bits, the number of bits is 2, the size of Harakusunoki is B4 (25
7x364) width (257) and the resolution is 12p.1, 1728X2≧257X12.

3456≧:1084゛, and the device is set under the above conditions.

As mentioned above, the above-mentioned scanning body moves and scans synchronously with reference to the document holding plate 1 containing the document glass.Next, the drive system that drives the two KTF scanning bodies like this I will explain about it. As shown in FIG. 1, a drive rod 26 is provided which is rotatable in both forward and reverse directions, and a wire drum '28 is fixedly attached to its shaft 27, on which a wire 29 is wound.

The wire 29 is installed on the main body and can be rotatably attached! - 930, 31tii and the end portion is installed at the lower part of the bearing 70 - In the same way, the wire 29 is fixedly attached to the main body and rotatably arranged. -932°33 and other oti
TS is fixedly installed at the bottom of bearing 1.

Since the wire drum 28 rotates a in the direction of arrow C (counterclockwise rotation), the scanning body 2 is pulled by the wire 29 and moves in the direction of arrow l. When scanning a predetermined original length -gt*, the drive peak 26 is reversed, and the wire drum 2 is rotated counterclockwise (J)K11, and the scanning unit 2 is rotated counterclockwise.
moves in the direction of the arrow and stops at another sensor (not shown) at a fixed position.

As described above, the optical asp device according to the present invention includes a light source that illuminates a document, a solid-state image sensor, and optical elements such as a mirror and a lens that refracts the image of the illuminated document and focuses it on the solid-state image sensor. A rectangular scanning body is housed in a rectangular case, and the image of the original is read by moving and scanning the scanning body along the original, thereby obtaining an extremely small and simple optical reading device. However,
This device places the original on a mounting table with the image side of the original facing upward, presses it with a document holding plate, and moves the scanning body with the original holding plate as a reference. Since it scans, it can be conveniently used not only for sheet-like originals but also for book-like originals, and image reading*p operations can be performed efficiently. Furthermore, when inserting or exchanging a document, it can be conveniently carried out by placing the scanning body in a fixed position and opening and closing the document holding plate tube.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the optical reading device according to the present invention, and Figure 2 WA is a perspective view showing the internal structure of the scanning body. 1...Device body 2...Taki food body 3#4...
Rail 5...Bearing 6...Bearing support plate 7
...Bearing 8...Bearing support plate 9...Document mounting table 10-...Document 11...Document glass 12
...Original, f lath support plate 13...Document holding plate 14, 15--Bearing is plate 16--Reflector shade i7.18-1148 rung 1
9...Slit 20.21...Fixed mirror 22.23...Lens 24.25...Solid-state image pickup device CCD 26-・Moving frame 27...Shaft 28...Wire drum 29 ...9 years 3G, 31
．． 32.33...Nori]

Claims (3)

[Claims] (1) A light source for illuminating the original, a solid-state imaging device, an optical element for condensing an image of the irradiated original onto the imaging element, etc. are housed in a rectangular case to constitute a long sword e scanning body,
An optical reading device that reads an original image by moving and scanning this rectangular scanning body along the original. (2) An optical reading device according to claim (1), which includes a document holding plate for holding down a document, and the document holding plate can be opened and closed only when the scanning body is in a fixed position. (3) The optical reading device according to claim (1), wherein the scanning body moves and scans synchronously with reference to a document holding plate that includes a transparent I lath for holding down the document.