JPS6069955A - Position adjusting mechanism of image pickup element in picture reader - Google Patents

Abstract

PURPOSE:To attain ease of adjusting work by adjusting the position to a lens of an image pickup element three-dimensionally to the incident direction of light independently. CONSTITUTION:Any one of the 1st adjusting body 17 among the 1st adjusting body displaceable in the incident direction of light, the 2nd adjusting body 18 displaceable vertically to the incident direction of light, the 3rd adjusting body 19 displaceable vertically to the incident direction of light and the displacing direction of the 2nd adjusting body, and the 4th adjusting body 20 turnable and displaceable around an axis in parallel with the incident direction of light is fixed to a base 21 and also an image pickup element 15 is fitted to the other 4th adjusting body 20. Thus, the relative position between the image pickup element 15 and the lens system is set to a normal position by displacing individually the adjusting bodies 17-20 in each direction.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a mechanism for adjusting the position of an image sensor in an image reading device, which makes it possible to easily adjust the position of an image sensor with respect to a t/lens system.

(Prior Art) In an image reading device such as a facsimile using an image sensor, reflected light from an object to be imaged is collected onto the image sensor using a lens system. Converts the image of the body into an electrical signal that displays the entire image. At this time, the lens system reduces the image of the imaging object (usually 1/10
Therefore, if the relative position of the lens system and the image sensor is not correct, the relative position will be reduced on the image sensor due to the reduction effect of the lens system. This is expressed as image distortion according to the reciprocal of the fraction.

Therefore, it is necessary to maintain a strict external relative positional relationship between the image sensor and the lens system.

By the way, in conventional image reading devices, the image sensor is simply fixed with bolts onto a base body to which the lens system is fixed, and no consideration is given to the relative position adjustment between the image sensor and the lens system. . For this reason, when adjusting the position of the image sensor, the adjustment can only be performed using the gap between the bolt and the bolt hole, and there is a problem in that the adjustment work is difficult. In particular, since a three-dimensional iJ view is essential for the relative position of the image sensor and the lens system, the adjustment work is extremely difficult, and there is a need for a solution to this problem.
1. Tita.

(Objective and Structure of the Invention) The present invention has been made in consideration of the above-mentioned problems, and is fixed to a base body in order to make it possible to easily adjust the position of the image sensor and the lens system. In an image reading device that is equipped with a lens system, an image sensor that converts the light incident from the object to be imaged through the lens system into a π1 signal and outputs the signal, the image reading device is displaced in the direction of incidence of the light. a possible first regulator;
a second adjustment body displaceable in a direction perpendicular to the direction of incidence of the light; a third adjustment body movable in a direction perpendicular to the direction of displacement of the second adjustment body and the direction of incidence of the light; a fourth adjustment body rotatably displaceable around an axis parallel to the first direction;
2. Adjustment means capable of adjusting and fixing each phase cutting position of the 3rd and 4th training trimmer; The present invention provides a position adjustment mechanism for an image sensor in an image reading device in which one of a second, third, or fourth adjusting body is fixed to the base body, and the image sensor is completely fixed to the other one. be.

According to this invention, by displacing each adjusting body in each direction separately, it is possible to set the relative position between the image sensor and the lens system to the normal position. i″L fixes the relative position of the image sensor and the lens system at their normal positions.

In particular, since the adjustment bodies have different displacement directions, their displacements do not interfere with each other, and the adjustment work is facilitated.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 6 are diagrams showing an embodiment of the present invention.

First, to explain the accommodation fee, in Fig. 1, ii is the original image (imaged object) moving slowly in the feeding direction, 12
is a fluorescent lamp that illuminates the original image 11 through the lens 13, and the fluorescent lamp 12 is irradiated with c source (L).
The light is reflected on the original image 11, hits a lens 14 fixed to a substrate (to be described later), and enters an image pickup device 15 such as a CCD. That is, the image of the original image 11 is reduced and formed onto the image sensor 15 by the lens 14, and is output from the image signal output terminal 15a of the image sensor 15 as a frost signal at an angle of 11 degrees.

Between the lens J4 and the image sensor 15, there are
A position adjustment mechanism 16 capable of adjusting the relative position 91 between the lens 14 and the image sensor 15 as shown in detail in the figure
is provided on a base body 21 to which is fixed. Position adjustment mechanism 1
Reference numeral 6 denotes a first ifAI support body 17 which can be displaced in the direction of incidence of light from the WL image 11 (b), and a first ifAI support body 17 which can be displaced in a direction perpendicular to the direction of incidence of light (6) (horizontal direction σ() in the figure). The displacement direction σ0 of the second adjustment body 18 and the second piece 18 and the incident direction (
Rotational displacement force 8i around 11 parallel to the direction perpendicular to the IQ (the third adjustment body 19 movable in the H direction (B) in the figure and the direction of incidence [present]) 8i!4 tone Kenkyu 2o and Ij゛(7).

As shown in FIG.
The flat plate part J7a located parallel to the incident direction 00 and the flat plate part 17h located at the J angle are integrally combined to form a disconnection circuit Lh. Furthermore, a light transmission hole 17c (see FIG. 4) and a hole 17d are formed in the flat plate portion 17b.

The head 23a of the depth adjusting screw 23, which is screwed onto the base 21, is rotatably inserted into the hole 17dK. The key is that the depth adjusting portion screw 23 has a Q portion 23b formed in a field tL1, and the surface of the flat plate portion 17b on the base body 21 side engages with the collar portion 23b. By rotating the depth adjusting screw 23 and changing the screw engagement length 6 with the base body 21, the first adjusting body 17 moves the flat plate portion 17b held on the flange portion 23b in the incident direction together with the flange portion 23b. II.

2nd F4 grave body 18I:i, as shown in FIG. . . .: It is composed of a flat plate in which a long hole 18d extending in the vertical direction (7) in the figure is formed. The bosses 18b and 18c are elongated holes 17e formed in the horizontal direction (0) in the figure toward the second adjusting body 18 side of the first adjusting body 17.

17ffc is fitted into the elongated hole 18dVr-, and an eccentric stud 24 rotatably provided in the hole 17g formed in the first adjustment body 17 pushes its eccentric portion 24a through. Since the bosses 18b and 18c of the second adjustment body 18 are fitted into the long holes 17e and 17f of the first adjustment body 17, only displacement in the lateral direction θ1) is allowed. By rotating it with a tool,
The eccentric portion 24aK of the eccentric stud 24 is pressed and displaced in the lateral direction σ0.

As shown in FIG.
9a and a long hole 19b extending in the horizontal direction ◇ in the figure are formed and are made of a YC flat plate, and the second protruding body 18
Long holes 18f and 18g are formed in the vertical direction (v) in the figure.
Bosses 19c, 19 that are slidably inserted in the vertical direction (G)
d is the formation field n. Further, an eccentric stud 25 rotatably provided in a hole 18h formed in the second adjustment body 18 is inserted through an eccentric portion 25a of the elongated hole 19bvC.

Since the bosses 19c and 19d of the third adjusting body 19 are fitted into the long holes 18f and 18g of the second adjusting body 18, only displacement in the vertical direction (v) is allowed. By rotating with a tool, the eccentric stud 2
The eccentric portion 25a of No. 5 is displaced in the vertical direction (G) by pressing σ/1.

Fourth adjustment body 201d, as shown in FIG. 6, light transmission hole 20a,! , ;- and the elongated hole 20b extending in the lateral direction ◇◇
is formed of a flat plate, and its third adjustment body 19
On the side surface, there is a 3rd or 1" fl.
The boss 20c, which is rotatably fitted into the hole 19e formed in the control body 19, feels formed. Sarani, long hole 20bK
U,m3i! + Eccentricity 526 of the eccentric stud 26 rotatably provided in the hole 19d formed in the manipulator 19
a is inserted. This 4th town chiropractic 20 is also a boss 20c
is rotatably inserted into the hole 19e of the third Wω assembly 19, and only a rotational displacement of 8' is accommodated, so that when the eccentric stud 26t rotates, it is rotationally displaced about the C emboss 20c. That is, by rotating the eccentric stud 26, the fourth tone glaze body 20 changes in the incident direction ()? ) produces a rotational displacement on the axis 'JiA' parallel to the axis 'JiA'.

The first of these. Second. Third and fourth adjusting bodies 17°18
．． 19 and 20 are integrally fixed to the base body 21 with screws 29, as shown in FIG. Further, the image sensor 15 provided on the substrate 27 is attached to the fourth adjustment body 20 with screws 2.
8, cp is fixed 2't. Depth adjustment screw 2 mentioned above
3. In such a position adjustment mechanism 16 for the image sensor 15 in which the eccentric stud 24° 25.26 machining screw 29 constitutes the adjustment means 30, the depth adjustment screw 23 is rotated as described above. As a result, the first R'a gloss body 17 is displaced in the light incident direction (R),
By rotating the eccentric stud 24, the second adjustment body 18
is displaced in the lateral direction QO, and by rotating the eccentric stud 25, the Niji third adjustment body 19 is displaced in the vertical direction ■, and finally,
By fully rotating the eccentric stud 2G, the fourth training body 20
produces a rotational displacement around an axis parallel to the incident direction 01).

These depth adjustment screws z3 and eccentric studs 24, 25, 26 can be adjusted independently without interfering with each other, and all can be operated from the image sensor 15 side as shown in FIG. It is. Therefore, the position of the image sensor 15 with respect to the base body 21 can be easily set to the proper position by adjusting the depth PI adjustment screw 23 described above and operating the eccentric studs 24, 25, 26'f from the front. can. After this, screw each 111IJ body 1 with screw 29.
By fixing 7.18 and 19.20 to the base body 21, the positions of the base body 21 and the image sensor 15 are fixed.

In addition, as mentioned above, in FIGS. 2 to 6 fC, illustration of some holes etc. is omitted in order to maintain clarity of the drawings.

(Effects of the Invention) As explained above, according to the present invention, it is possible to adjust the position of the image sensor with respect to the lens, or to independently perform each direction three-dimensionally with respect to the incident direction of light. This makes the work on the body cavity easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an overall outline of a position adjustment mechanism for an image sensor according to an embodiment of the present invention, FIG. 2 is an overall perspective view thereof, FIG. FIG. 6 is an exploded perspective view of essential parts. Explanation of symbols 11...Original image (imaged object), 14...Lens (lens system), 15...Image sensor, 16...Position adjustment mechanism, 17...First adjustment body, 18... second adjustment body, 19
...Third adjustment body, 20...Fourth adjustment body, 21...
-Base body, 30...adjustment means. Figure 1 Figure 3 X/ Figure 4

Claims (1)

[Claims] Fixed to the base 'I7. An image reading device that is equipped with a lens system, an image sensor that converts light incident from an object to be imaged through the lens system into a lightning signal, and outputs the lightning signal, which can be displaced in the direction of incidence of the light. a first adjusting body, a second adjusting body capable of displacing the internal pressure in a direction perpendicular to the incident direction of the light, and the second adjusting body
a third adjusting body movable in a direction perpendicular to the displacement direction of the first manipulator and the direction of incidence of the light; a fourth adjusting body rotatable around an axis parallel to the direction of incidence of the light; Second. Adjust each relative position 1 of the third and 8r34 adjustment bodies 1211
+1 fixable adjustment means; Second
．． Either one of the third or fourth adjustment bodies is fixed to the base body, and the image sensor is fixed to the other one, so that the relative position between the image sensor and the lens system can be adjusted. A position adjustment mechanism for an image sensor in an image reading device.