JP2016127552A5

JP2016127552A5 -

Info

Publication number: JP2016127552A5
Application number: JP2015002005A
Authority: JP
Filing date: 2015-01-08
Publication date: 2017-06-15
Anticipated expiration: 2035-01-08

Description

本発明に係る光学式読取装置は、
受光素子アレイが被読取体の像を得るため、この被読取体からの反射光を集光して前記受光素子アレイに入射させるレンズを、読み取りの主走査方向であるＸ軸の方向に多数配列したレンズアレイと、
前記Ｘ軸と直交する面内で、前記レンズアレイの光軸方向と一定の角度をなす２方向から前記被読取体を照明するため、前記Ｘ軸の方向に沿って前記レンズアレイの両側に並行して配置した、照明光を導く２個の半円柱状の導光体と、
前記レンズアレイを収納するレンズ収納室を中央部に設けるとともに、前記Ｘ軸の方向に沿って、このレンズ収納室の両側に形成され、前記導光体のＸ軸の方向の平面部を取付ける導光体取付面を設けて、前記レンズアレイと前記導光体の配置を定めるフレームと、
を備え、
前記フレームの外形と前記レンズ収納室とが内側に変形した内反り形状を有し、前記フレームの内反り面に対向する前記レンズアレイの両側面が前記フレームに固定されているものである。 The optical reader according to the present invention is:
Since the light-receiving element array obtain an image of the scanners, the lens makes incident on the light receiving element array condenses the reflected light from the object to be scanners, in the direction of the X-axis is the main scanning direction of the read- A large number of lens arrays;
In a plane perpendicular to the X axis, for illuminating the object to be read body from two directions forming a certain angle with the optical axis of the lens array, parallel to the sides of the lens array along the direction of the X axis Two semi-cylindrical light guides that guide the illumination light,
Guide provided with a lens housing for accommodating the lens array in the center, along the direction of the X axis, are formed on both sides of the lens housing, mounting a flat portion in the direction of X-axis of the light guide A frame for providing a light body mounting surface and defining the arrangement of the lens array and the light guide;
With
The outer shape of the frame and the lens storage chamber have an inwardly deformed shape, and both side surfaces of the lens array facing the inwardly warped surface of the frame are fixed to the frame.

Claims

Since the light-receiving element array obtain an image of the scanners, the lens makes incident on the light receiving element array condenses the reflected light from the object to be scanners, in the direction of the X-axis is the main scanning direction of the read- A large number of lens arrays;
In a plane perpendicular to the X axis, for illuminating the object to be read body from two directions forming a certain angle with the optical axis of the lens array, parallel to the sides of the lens array along the direction of the X axis Two semi-cylindrical light guides that guide the illumination light,
Guide provided with a lens housing for accommodating the lens array in the center, along the direction of the X axis, are formed on both sides of the lens housing, mounting a flat portion in the direction of X-axis of the light guide A frame for providing a light body mounting surface and defining the arrangement of the lens array and the light guide;
With
The outer shape of the frame and the lens storage chamber have an inwardly deformed shape, and both side surfaces of the lens array facing the inwardly warped surface of the frame are fixed to the frame. Optical reader.

The optical reading device according to claim 1, wherein the lens array is fixed with an adhesive, and a residual compressive stress of the frame is smaller than a compressive strength of the adhesive.

In the correction state in which the warpage of the inner warp shape of the frame is corrected, the relative position between the lens array and the light guide is within ± 1 degree of angle deviation from the design center value, within ± 0.1 mm of deviation in the inward warp direction, 3. The optical reading device according to claim 1, wherein the correction amount of the frame is adjusted so that the deviation of the lens array in the optical axis direction is within ± 0.1 mm.

Using the optical reading device according to claim 1, correction is made so as to eliminate warpage of the inner warp shape of the frame, both sides of the lens array are bonded and fixed with an adhesive, and compressive stress is applied to the adhesive. A method for manufacturing an optical reader to be generated.

When the correction of the warp of the frame is solved, the relative position between the lens array and the light guide is changed from the design center value in the angular deviation, the deviation in the inward curvature direction, and the optical axis direction of the lens array. 5. The method of manufacturing an optical reading device according to claim 4, wherein the correction amount of the frame is adjusted by defining three values of deviation and setting these values within the specification values.