JPS61159604A - Optical fiber array plate and optical fiber array plate mounting photoelectric transducer - Google Patents

Abstract

PURPOSE:To use a small-sized line sensor as a large-sized readout sensor by arranging optical fibers as photoconductor linearly on a surface facing an optical and zigzag on an end surface of light incidence on a photoelectric transducer. CONSTITUTION:Plural fiber array units 3 are arranged linearly in parallel to an original line at the readout end surface part 1' of the optical fiber array part facing the original surface and zigzag alternately at the end surface part 1' of light incidence on the photoelectric transducer 5; and they are combined and united on the same plane to constitute an optical fiber array plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an optical fiber 7-lay plate and an optical fiber array plate equipped with photoelectric conversion elements, which are used as a light guiding section of an information reading sensor.

[Technical background and problems of the invention] Generally, in the conventional optical fiber 7-ray plate,
A part of the optical fiber serving as a light guide for information reading has a reading end face portion 1' facing the document and an end face portion 1' for introducing light into the photoelectric device (photoelectronic device), which are formed in a straight line. FIG. 6 is an explanatory diagram of a conventional optical fiber array plate, in which the reading end surface 1'' and the light introduction end surface 1' of a part of the optical fiber consisting of the optical fiber 1 serving as the light guide are formed in a straight line. There is.

Therefore, when reading a large-sized document (for example, A4 size), the photoelectric conversion element is
It is necessary to use a linear optical line sensor of 4 sizes). Amorphous silicon and the like are suitable optical line sensors for this purpose.

The reading end surface portion V' of a portion of the optical fiber that is the light guide
When reading a large-sized original (for example, A4 size) using a conventional optical fiber 7-ray plate in which the light introduction end face is arranged and formed in a straight line, the size is smaller than the effective reading length of a part of the optical fiber. line optical sensor (e.g. CCD: Charge Couple
When using edDew 1ce), the following disadvantages occur. In order to obtain the linear length as the reading effective length, for example, if a COD is used, one COD is small (for example, the effective length of the light receiving part is about 35 cm, and the total length of the unit is 40 to 411 m). , Since the required length cannot be obtained with one piece, it is necessary to arrange multiple pieces in a straight line.
Normally, both ends of a CCD unit cannot receive light because they are packaged, so the light-receiving surface is missing at the joint of multiple CCD units, so the part of the document facing the joint cannot be read. Simply connecting them in a straight line cannot be used to read large (for example, A4 size) documents.

[Object of the Invention] The present invention provides an optical fiber array plate and a photoelectric conversion element-equipped optical fiber array plate using a small line optical sensor such as the above-mentioned COD as a contact type reading sensor for reading a large (for example, A4 size) document. The purpose is to provide

[Structure and operation of the invention] In the optical fiber array plate of the present invention, a portion of the optical fibers serving as a light guide are arranged in a straight line on the surface facing the original line, and the end surface portion for introducing light to a photoelectric conversion element for reading is arranged in a straight line. has a structure arranged in a staggered manner with a predetermined length.

The present invention will be explained below with reference to the drawings. FIG. 1 is an explanatory diagram of an optical fiber array plate of the present invention, and FIG. 2 is a plan view and a sectional view thereof. FIG. 3 is an explanatory diagram of a fiber array unit which is an element constituting the optical fiber array plate of the present invention. In this specification, the fiber array number unit refers to an optical fiber portion 1 (hereinafter referred to as an optical fiber or an optical fiber portion) which is a light guide in a plane perpendicular to the original line to be simultaneously read as shown in FIG. ) refers to a fiber array plate whose direction is oblique to the original surface.

The optical fiber array plate of one invention has a plurality of fiber array units 3, as shown in FIG. Furthermore, the light introducing end face 1' (hereinafter referred to as the light introducing end face of the optical fiber array or In order to integrate an optical fiber array plate, the optical fiber array plate is formed by combining the optical fiber array plates in such a manner that the light introducing end face portions are arranged in a staggered pattern and the entire surface remains on the same plane.

A transparent adhesive having a refractive index similar to that of the base member 2 is used. When the base material is glass, the adhesive used is, for example, an epoxy adhesive or an acrylic adhesive. The length of the light introduction end face 1' of the fiber array unit 3 is equivalent to the length of the effective light receiving part, ie, the window part, of the photoelectric conversion element used.

Furthermore, in the optical fiber array plate 7 equipped with photoelectric conversion elements, which is another aspect of the present invention, the window portion of the photoelectric conversion element 5 faces the light introduction end face 1' of the fiber array unit 3, as shown in FIG. As shown in FIG. 5, a plurality of fiber array units 6 with photoelectric conversion elements mounted thereon are fixed together, and the reading end surface 1'' is formed into a linear band shape parallel to the document line, and the light introduction end surface 1 ' and the photoelectric conversion elements 5 attached thereto are arranged in a staggered manner with respect to a plane that includes the center line of the linear strip and is perpendicular to the document surface, and are further combined and integrated so that the whole remains on the same plane. A transparent adhesive having a refractive index similar to that of the base member 2 is used for the above-mentioned integration and for fixing the photoelectric conversion element 5 to the fiber 7 lay unit 3. When the base material is glass As the adhesive, for example, an epoxy adhesive or an acrylic adhesive is used.

Alternatively, the optical fiber array plate 7 with photoelectric conversion elements attached thereto may be an optical fiber array plate 7 shown in FIG. may be bonded using a transparent adhesive having a refractive index similar to that of the base member 2.

In the optical fiber array plate 7 equipped with photoelectric conversion elements of the present invention, a portion 1'' of the optical fiber 1 facing the document surface has a straight line parallel to the document line, and faces the plurality of photoelectric conversion elements 5 and the element 5. Optical fiber part 1
' is the optical fiber array plate 7 with photoelectric conversion elements attached.
It is characterized by an alternating staggered arrangement on the side opposite to the side facing the manuscript.

A document created by combining a line optical sensor such as a COD, which is a photoelectric conversion element, with the light introduction end face 1' of the optical fiber array plate 4 of the present invention, or by using the optical fiber array plate 7 equipped with a photoelectric conversion element of the present invention. The reading is performed as follows.

°←" Optical fiber 7 lay play) (d Original reading end surface 1"
is a combination of the document reading end surface portions 1'' of a plurality of fiber array units 3 in a series of linear strips parallel to the document line in the same plane, and the document reading end surface portions 1'' of the optical fiber array plate 4 A plurality of photoelectric conversion elements 5 are arranged in a staggered manner with a predetermined length in a plane including the center line of `` and perpendicular to the document surface.

The arrangement is such that the portions that cannot receive light covered by the packages at both ends of the adjacent photoelectric conversion elements 5 are complemented, respectively, so that the document image from the entire document reading end surface 1'' of the optical fiber array plate 4 can be read without any omission. Various arrangements are possible depending on the form and structure of the photoelectric conversion elements used, but basically, a plurality of photoelectric conversion elements are arranged in a staggered manner on a plane perpendicular to the document surface and parallel to the document line. When the effective length portion of the element 5 that can receive light is projected, each projection is continuous and constitutes the entire effective length portion without omission. In this case, the effective length portions of the plurality of photoelectric conversion elements may partially overlap. FIGS. 2, 4, and 5 show examples of this.

[Example] A COD line sensor was used as the photoelectric conversion element to produce a 7-ray plate of optical fibers equipped with a closed-view photoelectric conversion element.

The COD used had a horizontal length of 40 layers, an effective length for light reception reading of 35+wm, an effective width of 0.5 layers, and a length of 10 layers. On the other hand, in the fiber array unit, the effective length of a part of the optical fiber is 351 mm, and the effective length of the same part is
l Homaro, length 30mm, thickness 5mm (Structure shown in Figure 3)
These were arranged as shown in Fig. 4, and seven pieces were bonded together using epoxy adhesive to create an optical fiber with a contact type photoelectric conversion element attached with an effective reading length of 245 layers with the structure shown in Fig. 5. I made an array plate. When an A4-sized document (width 210 mm) was read by feeding it in the vertical direction using this, it was possible to read an image of the document without any missing parts.

``Invention Δ'' Results] Currently, the amorphous silicon sensors that can be used as contact-type reading sensors have low yields when they are long (and are difficult to assemble). In addition, although conventional line optical sensors (such as CCDs and BBDs) are easily available, they are relatively short in length and are packaged as a unit, so even if multiple units are connected, the packaged part is The optical fiber array plate of the present invention or the optical fiber array plate equipped with a photoelectric conversion element could not be used as a contact type reading sensor because it could not receive light. By effectively combining these, the portion of the package that cannot receive light can be eliminated, and the sensor can be used as a large-sized reading sensor. Furthermore, by combining an appropriate number of fiber array units 3 or fiber array units 6 equipped with photoelectric conversion elements, a large reading sensor with the required length can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an optical fiber array plate according to the present invention, and FIG. 2 is a plan view and a sectional view of the optical fiber array plate, and also shows an example of the position of the photoelectric conversion elements that are combined. FIG. 3 is an explanatory diagram of a fiber 7 lay unit, FIG. 4 is an explanatory diagram of a fiber 7 lay unit equipped with a photoelectric conversion element, and FIG. 5 is an explanatory diagram of a fiber 7 lay unit equipped with a photoelectric conversion element according to the present invention. . FIG. 6 is an explanatory diagram of a conventional optical fiber 7 lay plate. l...Optical fiber 1'...Light introducing end face portion 1'' of the optical fiber array portion to the photoelectric conversion element...Original reading end face portion 2 of the optical fiber array portion facing the original document.・Base member 3 ... Fiber array e unit 4 ...
Optical fiber array plate 5 ... Photoelectric conversion element rosin optical sensor) 6 ... Photoelectric conversion element mounted fiber array unit 7 ... Photoelectric conversion element mounted optical fiber array plate 8 ... Light source 8 ・... More than the manuscript 112 early 2 drawings 3 [21 readings 4 eyes'#-5 drawings 6th group 11゛.

Claims (2)

[Claims] (1) In an optical fiber array plate for close-contact reading, which is constructed by sandwiching an optical fiber array portion formed from a collection of many optical fibers between transparent base members, the reading end surface of the optical fiber array portion facing the original is readable. The end face of the optical fiber array portion through which light enters the photoelectric conversion element has a predetermined length in the form of a linear strip with a width necessary for the width of the document. An optical fiber array plate characterized by being arranged in a staggered manner. (2) An optical fiber array plate for close-contact reading, which is constructed by sandwiching an optical fiber array portion formed from an aggregate of a large number of optical fibers between transparent base materials, and the reading end surface of the optical fiber array portion facing the original. is in the form of a linear strip with a width necessary for reading, and the end surface portion of the optical fiber array portion that introduces light to the photoelectric conversion element has a predetermined length that includes the center line of the linear strip portion. 1. An optical fiber array plate equipped with photoelectric conversion elements, characterized in that the optical fiber array plate is arranged in a staggered manner with respect to a plane perpendicular to , and a photoelectric conversion element is installed on each of the light introduction end face portions.