JPH03187562A - Position controller for rod lens array - Google Patents

Abstract

PURPOSE:To miniaturize a picture input/output device using a rod lens array and to reduce cost by adjusting the position of the rod lens array in the vertical direction by a holder and a position controlling means. CONSTITUTION:When turning sharp tip screw 15 at two spots in right and left so as to be advanced to the center of a figure, a rod lens array 5 is pushed up in the upper direction of the figure against the spring force of a claw 12c of a holder 12 and when turning the sharp tip screw 15 reversely, the rod lens array 5 is pushed down by the spring reaction of the claw 12c of the holder 12. Thus, the vertical position of the rod lens array 5 is adjusted by the turn of the sharp tip screw 15 and the spring force of the claw 12c of the holder 12 as the position adjusting means. Since the position adjusting means is pro vided in upper parts at both ends in the lengthwise direction of a sensor base 6, width B of the rod lens array 5 is narrower than width A of the sensor base 6. Thus, the compact picture input/output device can be obtained at low cost.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a position adjustment device for a rod lens array used in image input/output devices, such as contact image sensors, LED printers, liquid crystal printers, etc. .

[Conventional technology]

Figure 4 shows, for example, Mitsubishi Electric Branch Line, Vol. 60. Na
11. FIG. 11 is a sectional view showing a conventional contact type image sensor shown in 1986, 60.

), (1) is the original, (2) is the original guide, (3
) is a housing that incorporates a line light source (4), a rod lens array (5), etc., which will be described later. (4) is a line light source with linearly arranged light emitting diodes, (5) is a rod lens array for erecting equal-magnification imaging, which is composed of a plurality of rod lenses (not shown), and (6) is a linear sensor. The board (7) is a drive No. 9M detection section.

Next, the operation will be explained. The light from the line light source 0) illuminates the original (1) in a negative manner. The reflected light from the illuminated original (1) enters the rod lens array (5), where it is condensed and
imaged. The sensor board (6) converts it into an electrical signal according to the grayscale information on the surface of the original (1), and sends it to the signal detection unit (7).
) to obtain a photoelectric conversion output signal.

The above rod lens array (5) is composed of a plurality of rod lenses, and this rod lens is made by Nippon Sheet Glass Co., Ltd. and is called S@1foc (trademark). Figure 5 shows the company's technology. Material 5ELFOCLENS AR
This is part of an explanatory diagram published in RAY (printed October 1987). The rod lens (8) in Figure 5 is made of glass, which is a solid dielectric, and has a parabolic refractive index distribution from the center to the periphery, and light travels through it meandering at a constant period, so the lens Perform the fI key equivalent to . FIG. 5(B) shows the structure of the rod lens array (5). As shown in Fig. 6, this rod lens array (5) has an object-to-image plane pressure of 1 it (hereinafter referred to as TC), and generally an image cannot be formed unless the distance between the light source and its imaging point is TC. , and the rod lens array (5) must be located at the center of the TC.

Therefore, in an image hole/output device such as an image sensor using such a rod lens array (5), in order to obtain the best image formation state, the rod lens array (5) is used as shown in FIG.
) requires an adjustment mechanism α◆ to finely adjust the position. In Figure 7, (5) is a rod lens array, (6) is a sensor board, (6a) is a sensor, al) is a heat sink that mounts this sensor board (6) and has a heat dissipation function, and 0 is a holder. And spring claws (12m),
(12b) and (12e). (To) is a side plate with grooves (13m) provided at both ends of the above holder.
12m) is engaged, the rod lens array (5) is pressed down by the claws (12b) and (12a), and as a result, the side plate (
A rod lens array (5) is supported at (to). α
◆ is a screw for the height direction position adjustment mechanism of the rod lens array (5). Note that A is the width of the sensor substrate, and B is the width of the rod lens array.

[Problem to be solved by the invention] The position adjustment of the conventional rod lens array (5) is performed by adjusting the position of the side plate (2) as described above.
) The holder O is inserted into the groove (13m) provided at both ends of the claw (1
2m) and is fixed, and the remaining claws (12b) (1
2e) by holding the rod lens array (5) R and rotating the screw α4 installed at the bottom of both ends of the rod lens array (5) and outside the width A of the sensor board (6). (5) was pushed up and pushed down by the spring reaction force of the upper claw (12a) to adjust the height direction.

Therefore, (1) When adjusting the height direction position of the rod lens array (5), it is necessary to turn the screw α◆ from the bottom of the heat sink 0υ with a screwdriver, etc., which is difficult to work with. As a result, it is difficult to obtain position adjustment accuracy.

(2) Since the screw α◆ is installed on the outside of the sensor board (6), the relationship between the width A of the sensor board (6) and the Ii[B of the rod array lens is BAA, and the size is larger than that of the sensor board (6). It becomes a device and is uneconomical.

There was a problem.

This invention was developed in order to solve the above-mentioned problems, and it has a good mechanism for adjusting the position of the rod array lens in the height direction, enables highly accurate adjustment, and also allows for compact and inexpensive image processing. The purpose is to obtain a hole/output device.

[Means to solve the problem]

The rod lens array position adjustment means according to the first invention includes a sensor substrate, a side plate and a rod lens array supported by a holder provided at both ends of the side plate in the longitudinal direction, and both ends of the sensor substrate in the longitudinal direction. and a position adjustment means for the rod lens array provided at an upper part, and the height direction position of the rod lens array is adjusted by the holder and the position adjustment means.

The rod lens array position adjustment device according to the invention also includes a sensor substrate, a side plate, a rod lens array supported by holders provided at both ends of the side plate in the longitudinal direction, and a rod lens array in the longitudinal direction of the rod lens array. and position adjustment means provided at both ends, and the height direction position of the rod lens array is adjusted by the holder and the position adjustment means.

[Effect]

In the rod lens array according to the present invention, the position in the height direction is adjusted by the position adjustment means and the holder, and the device is miniaturized.

[Embodiments of the invention]

An embodiment of the first invention will be described below with reference to the drawings.

Note that the parts whose explanation is omitted are the same as those in the conventional example. 1st
In the figure, b (to) is a pointed screw, and the sensor board (6)
It is provided at the upper part of both ends in the longitudinal direction, and is fitted with a screw seat having a female thread. The pointed end of this pointed end screw (end) contacts the lower part of the rod lens array (5) and supports its own weight, and together with the screw seat α, the rod lens array (5)
It serves as a position adjustment means.

The height direction position adjustment of the rod lens array (5) of the image hole/output device with this structure is done by rotating the pointed screw (2) so that the tapered part at the tip of the pointed screw (end) is adjusted. Moving.

In Fig. 1, when the two pointed screws 0 on the left and right are rotated so as to advance toward the center of the figure, they overcome the spring force of the holder (to) (7), the claw (14e), and the rod lens array (5). ) is pushed up towards the top of the diagram. Then, when the pointed screw (end) is rotated in the opposite direction to the above, it is pushed down by the spring reaction force of the claw (120) of the holder 0.

In this way, the height direction position of the rod lens array (6) can be easily adjusted by the rotation of the pointed screw (end) serving as the position adjustment means and the spring force of the claw (120) of the holder 0. Since position adjustment means are provided at the top of both longitudinal ends of the sensor board (6), the sensor board (6) is
Width B-71 of rod array lens (5) from width A of 6)
1, making the device smaller and cheaper.

In the above embodiments, a case where a thread with a pointed end is used has been described, but it is not necessarily necessary to have a pointed end, and the same effect can be obtained even if the end is tapered and has a conical shape.

Next, an embodiment of the second invention will be described based on FIG. 2.

0 is the side plate, and the holder (
2) is fixed by engaging the claw (32m), and the remaining claw (32m)
2b) (32a) holds the rod lens array (5). The above (328) to (32e) have spring properties, and the claw (326) is the above rod lens array (5).
) is supporting its own weight from below. The pawl (32d) has an internal thread, and a screw is attached to this internal thread, and serves as means for adjusting the position of the rod lens array (5). The height direction position adjustment of the rod lens array (5>) having such a structure can be performed by rotating the screw @.For example, by rotating the screw via the claw (32d),
The rod lens array (5) is the claw (326) of the holder (to).
) to overcome the spring force and move downward in the figure. When it rotates in the opposite direction, it is pushed upward by the spring reaction force of the claw (32e). In this way, the screw (
The height direction position of the rod lens array (5>) can be easily adjusted by the rotation of E) and the claw (32a) of the holder. Position adjustment means are provided at both longitudinal ends of the rod lens array. Since the sensor board (6)
Since the width of the rod lens array (5> is smaller than the width A of the rod lens array 5), the device can be made smaller and cheaper.

Another embodiment of the second invention is shown in FIG. (Incorporated) is a holder having claws (22m) to (22e), the functions of which are the same as those explained in FIG. Side plate (to)
Grooves (23m) are provided at both ends of the rod lens array, and the claws (220) of the holder engage with them.Screw seats (23b) are provided at both ends of the side plate (to), and screws are attached to the rod lens array. (5>) serves as position adjustment means.

The operation is similar to that described in FIG.

〔Effect of the invention〕

As described above, according to the first invention, the position m of the rod lens array supported by the holders provided at both ends of the side plate in the longitudinal direction and the rod lens array provided at the upper part of both longitudinal ends of the sensor substrate is adjusted. and according to a second aspect of the invention, the holder and the position adjustment means adjust the height direction position of the rod lens array. The rod lens array is provided with a supported rod lens array and position adjustment means provided at both longitudinal ends of the rod lens array, and the height direction position of the rod lens array is adjusted by the holder and the position adjustment means. 1. In both of the second inventions, the position of the rod lens array can be easily adjusted, making highly accurate adjustment possible, and the width of the rod array lens can be reduced.
The image aperture/output device using such a rod lens array can be miniaturized and is also inexpensive.

[Brief explanation of drawings]

Figure 1 shows an embodiment of the first invention, Figure 2 shows an embodiment of the second invention, and Figure 3 shows the position of the image hole/output device in another embodiment of the second invention. FIG. 4 is a sectional view of a conventional contact image sensor, and FIG. 5 (A) is a perspective view showing the adjustment device.
B), FIG. 6 is an explanatory diagram of a rod array lens, and FIG. 7 is a perspective view showing a conventional position adjustment device. In the figure, (5) is a rod array lens, 0 slope (2)
is holder, (120~(12e), (22m+)
~(22a) (32aO0 is a pointed screw, α・ is a screw seat, and ni) is a screw. Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (2)

[Claims] (1) Position adjustment of the sensor board, the side plate, the rod lens array supported by holders provided at both ends of the side plate in the longitudinal direction, and the rod lens array provided at the top of both ends of the sensor board in the longitudinal direction A position adjustment device for a rod lens array, comprising: means for adjusting the height direction position of the rod lens array by the holder and the position adjustment means. (2) A sensor board, a side plate, a rod lens array supported by holders provided at both ends of the side plate in the longitudinal direction, and position adjustment means provided at both ends of the rod lens array in the longitudinal direction. . A rod lens array position adjustment device, characterized in that the height direction position of the rod lens array is adjusted by the holder and the position adjustment means.