JPS5839166A - Image reader with solid-state photodetector - Google Patents

Abstract

PURPOSE:To make respective linear reading parts of photodetectors coincident with the same straight line with high precision, by providing an adjusting means which moves photodetectors in the direction of the optical path and vertically when plural solid-state image pickup elements are arranged on the same straight line. CONSTITUTION:Solid-state photodetectors 8S, 8R, and 8L such as CCDs have linear reading parts 8S1, 8R1, and 8L1, and corresponding lenses 9S, 9R, and 9L are arranged in front of them. Left and right optical systems 9L, 8L, 9R, and 9R are moved back and forth on an optical axis X-X on a basis of central optical systems 9S and 8S to perform focusing. Inclination errors of respective linear reading parts 8S1, 8R1, and 8L1 of photodetectors to horizontal and vertical faces are corrected, thus making three linear reading parts coincident with the same straight line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a one-time reader that uses a plurality of solid-state light receiving elements (photoelectric conversion elements) such as CODs having linear reading sections, and particularly relates to a one-time reader that uses a plurality of solid-state light receiving elements (photoelectric conversion elements) such as COD having a linear reading section, and particularly relates to a one-time reader that uses a plurality of solid-state light receiving elements (photoelectric conversion elements) such as COD having a linear reading section. - Same as the shape of the pile -
Concerning the ninth method for adjusting received light water to make it join the magnetic clay.

The original image is read by COD Gin's solid light-receiving element C Honyo (abbreviated simply as light-receiving element) and changed to a 9% signal, and a laser corresponding to this signal is irradiated onto m-gen dome) 74 to make it silent. Ims
The technology of forming an image and developing it to create an original image, and the technology of reproducing the image by operating a well-known 1# device such as a thermal head or an inkjet using the above electric signal, are as follows:
Since it can be easily processed electrically, such as enlarging/reducing 1iki*, reversing negative/positive, and creating mirror images, the range of applications has been expanding in recent years.

In this method, for example, a large document is divided and read using several light receiving elements. Alternatively, it is often the case that multiple copies of the manuscript are taken up by corresponding light-receiving elements and then re-agglomerated in four ways on one recording medium. Toritei is I
There is still a need to match the degree on the hJ-line.

The present invention has been developed for this purpose.One of the preferred embodiments shown in the drawings will be explained in detail below. In Figure 1, 1 is the outer box for the main body of the device;
Reference numeral 2 denotes a transparent document table such as a power plate, 6 a housing 4 for reading and scanning, a tube-shaped document illumination light source 5 such as a fluorescent lamp, a first mirror 2-6 that receives reflected light from the document, and its mirror 6. It consists of a second mirror 7 that bends the reflected light in the horizontal direction, a lens 9 that converts the horizontal light and forms an #i image on the light receiving surface of the solid light system 80 of the CCD group.

In the above-mentioned reading scanning unit, as shown in Fig. 2, a plurality of optical systems (three in the case of the figure) consisting of a solid light receiving probe 8 and an imaging lens 9 are provided to read the original at high resolution. It is.

In this case, the linear reading section 8 of the can light receiving element 8s, 8R, 8L
It is necessary that 81.8R1.8L1 always match on a four-line line.

Therefore, the present invention provides one of the optical systems, generally the central optical system 9S.
・8S is standard, left and right optical system 9L, 8L, 9R・
8Rt - This is compatible with lenses 9L, 9R, 9L
The optical axes x-xtt of the
Focusing is performed by moving L and 8R onto the optical axis XX after iσ. The focusing means t-FIG. 6-4 will be explained. The structure of this part is for each light receiving element 8s, 8R,
This is common to 8L.

The upper surface of the bottom plate 41 of the housing 4 of the reading and scanning unit B is set to be a plane parallel to the optical axes XX of the lenses 9S, 9R, and 9L. A pair of left and right sliding guides 10 and 10 are placed on the bottom plate.
(In Figure 1g5, the system on the near side is omitted.)
The space therebetween is formed into a trapezoid m1oi and is provided parallel to the optical axis. The trapezoidal sliding table 11 was tightly fitted into the trapezoid 'l14101, and the w4m screw receiver 1 was attached to the rear end surface of the bottom plate 41.
2, loosely insert the adjustment screw 16 back into the screw hole 14 of the OwI moving table 11. A coil spring 15 fitted to the screws 1 and 3 is installed between the sliding base 11 and the screw receiver 12 to push the sliding base toward the front lens. Therefore, when the screw 16 is tightened, the sliding base 11 When the slide table 11 is moved back and loosened, the spring 1
5 is pressed to move forward and focus value - firefly is performed.

Fix the slide table 11 at the set position with the push screws 16.0 Fix the L-shaped mounting plate 17 to the top surface of the slide table 11, which is slightly higher than the top surface of the slide #* inner 10. Spacers 55. The light receiving element 8 is supported on the mounting plate 17 by screws 20 screwed into the mounting plate 17, and finely adjusted by the screws 20.
The one-shaped tIt-taking portion 881 of S is adjusted perpendicularly and horizontally to the optical axis XX. In addition, depending on the necessary cost, spacer 1
A coil spring wrapped around a screw 20 is drilled into the hole 9.

As described above, each light receiving element 8S, 8R, 8L is focused by moving back and forth on the corresponding lens optical axis Errors are corrected. Therefore, theoretically, the three linear reading sections should align on a straight line, but
We cannot tolerate slight deviations due to errors in adjustment or workmanship. Therefore, the central light-receiving element 8S is used as a reference, and the left and right light-receiving elements 8L to 8H are configured to match the inclinations, especially in the vertical plane.

Figures 5 and 6 show its implementation. This corresponds to the mounting plate 17 on which the printed board 19 is attached in the reference light receiving element 8s. A mounting plate 21 is provided independently as shown in FIG. 5, and the vertical mounting plate 17a attached to the focusing slide 11 is moved up and down slightly 1IIi by means of a vertical adjustment screw 22.

As its mechanism, a pair of sliding guides 23 on the left and right sides are mounted on the mounting plate 17m.
The mounting plate 21 is attached to the trapezoidal sliding table 24 which is arranged vertically and tightly fits into the trapezoidal space groove 261 between the mounting plate 21 and the set screw 25.
and screw holes 26. The axis of the set screw 25 is set on a vertical plane including the optical axes X--X of the lenses 9R and 9L. The adjustment screw 22 is attached to the vertical positioning plate 27 attached between the upper surfaces of the left and right sliding guides 23, 23. In this case, the gm screw 22 is a two-step screw consisting of a threaded portion 22m screwed into the positioning plate 27 and a threaded portion 22b screwed into the sliding base 24 having a smaller diameter than this threaded portion.
6 fillet 0.5 m, threaded part 22a with M4 pitch 0.
If it is 7 dews, the vertical movement of the sliding table 24 and the light receiving elements 8R and 8L during one rotation of the screw 22 is 0.2■ (=0.7 - 〇, 5), which is finely adjusted. . 28 is a coil spring that pushes the sliding base 24, and 29 is a screw that attaches the positioning plate 27 to the sliding guide 23. If the positioning plate 27 is configured to be able to move slightly left and right in the long hole with respect to this screw, the V4 setting screw 2
The alignment of the screw holes of the positioning plate 27 and the sliding base 24 with respect to the positioning plate 27 is automatically performed.

Vertical scanning 1141 adjustment using the above screw 22, optical axis X-
The up and down ms in the Y direction with respect to
4 screw holes 31 and screws omitted in the figure, the rotating board is fixedly attached to the sliding base 21.

Said set screw 25t; i This time #031 that penetrates the board 3o and is screwed into the screw hole 26 of the slide table 24 is the screw 250.
The mounting plate 21 is an elastic seat made of rubber or the like between the head and the mounting plate 21.
is pressed against the rotating board 3o with an appropriate pressure.

The bins 52 (the bins on the right side in the $5 diagram are omitted) installed on the left and right sides of the upper part of the rotating board 30 are inserted into the holes 35 of the mounting plate 21, which are larger than the bins 32. A coil spring 35 is stretched between one bottle 62 and the bottle 34 set on the mounting plate 21, and the set screw 25 is attached to the mounting plate 21 at the right 1C in the example of FIG.
Gives a second character.

Mounting plates 2 and 1 have plates 2 and 1 attached to the axes of the bins 32 and holes 33.
1, that is, the linear reading portions 8R1 and 8L of the light receiving elements 8R and 8L.
0 with the set screw 25 of 1 as the axis center (located on the optical axis)
By finely adjusting the directional inclination, the reading section 8 of the light receiving elements 8R-8L
R1.8L1 is made to coincide with the linear extension of the reference light receiving element 8S.

In FIGS. 5 and 6, equivalent structural parts to those in FIGS. 3 and 4 are indicated by the same reference numerals.

The present invention provides a reading device that photoelectrically converts nine images using multi-ridged solid-state light-receiving elements as described above, in which each light-receiving element is focused on a corresponding lens.

Also, using one of the light-receiving elements as a reference, the directness of the other light-receiving elements with respect to that one-shaped threaded portion is finely determined111.
1Ik) Matching work is carried out vertically by Taniyoshi Naozuzu.The pixels picked up by multiple solid-state light receiving elements are electrically memorized, and the number of pixels taken out from each memory is adjusted according to the image p4 current need. The mechanism for moving the document on the glass plate 2 of the scanning unit 3 is omitted as it is outside the scope of the present invention.
This type of mechanism, which is conventionally known, is used as appropriate. In the illustrated example, the wire take-up pulley 39 rotates clockwise due to the forward rotation 1 of the motor M and the operation of the electromagnetic clutch 58. is rotated in the direction of the arrow in FIG. 2 via the page change pulleys 43 and 44 @ 45, Scanner 5 - Move knit 3 to the right in FIG. 46 Hiro supporting metal guide rail, 47 company The other supporting metal fitting 480 guide rail, 49, 50, 51 Hiro There is a wire pulley that moves the supporting metal fitting 48 at the same speed as 40 on the left side. Its pulley 51tj same 45 and coaxial 5
The optical system is placed on a movable table 53 between the supporting hardware 40 and 48, which is fixed to 0.

[Brief explanation of the drawing]

Figure Ii Hiroki represents a preferred embodiment of the present invention. Fig. 1 is a longitudinal cross-sectional side view of the image reading device using a solid-state photodetector. Fig. 2 is a perspective view of the internal mechanism of the same device to which the invention is applied. Fig. 3 and Fig. 4 are the focusing of the photodetector. A sectional view of the mechanism, j1g5 Figure 6 is an exploded perspective view and a vertical sectional view of the linearity-** structure of the light receiving element. 1 Ifi outer box, 2 Hiro manuscript table, 3 reading scanning unit. 9S, 9R, 9L Hiro lens, 88, 8R, 8L are solid light receiving elements, 8S1, 8R1, 8L1 are linear reading parts, 1
1, 101, 16 are focusing adjustment mechanisms, 24, 261
・22 is vertical movement l! lI! I mechanism, 30 to 67 are tilt adjustment mechanisms.

Claims (2)

[Claims] (1) In an image capture device that performs photoelectric conversion using a plurality of solid-state light-receiving elements. One light-receiving element used as a reference is provided with an intermediate means movable in the optical path direction with respect to the imaging lens for the light-receiving surface. The other light-receiving elements are provided with means for adjusting the optical path in the vertical direction as well as for adjusting the optical path in the vertical direction, and for adjusting the #I excitation centering on the optical path. An M-shaped mounting frame for a solid-state light-receiving element, characterized in that a linear reading part of another light-receiving element is made to join an extension of the M-shaped reading part of the light-receiving surface of the reference light-receiving element. (2) Multiple optical systems consisting of lenses and solid-state light receiving elements are installed on the scanning movable table. The light-receiving elements of each group i are configured to be focused on each corresponding lens using a trapezoidal sliding guide and an adjustment screw. Using one optical system as a reference, the light receiving elements of the other optical systems are moved up and down using a trapezoidal sliding guide and an adjusting screw. The light-receiving element of the other optical system is tilted to the right in a vertical plane centering on the focus axis, and the other light-receiving element is aligned on the same straight line as the Iip-shaped groove of the light-receiving element of the reference optical system. An image reading device according to the striped IJJ description, characterized in that the elements are aligned.