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Optical information reader

A technology for reading devices and optical information, which is applied in the direction of instruments, induction record carriers, electromagnetic radiation induction, etc., to achieve the effect of miniaturization, reduction of deviation, and reduction of height

Active Publication Date: 2017-08-04
DENSO WAVE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case where the center of the imaging range is indicated by the marker light, there is a problem that there is a large deviation between the actual center of the imaging range and the center of the marker light.

Method used

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Experimental program
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Effect test

no. 1 approach

[0058] Next, an optical information reading device according to a first embodiment of the present invention will be described with reference to the drawings.

[0059] The optical information reading device 10 of the present embodiment is configured as an information code reader that optically reads information codes such as one-dimensional codes and two-dimensional codes. Here, as the one-dimensional code, for example, a so-called barcode composed of JAN code, EAN, UPC, ITF code, CODE39, CODE128, NW-7, and the like is conceivable. In addition, as a two-dimensional code, for example, a square-shaped information code such as a QR code, a data matrix code, a Maxi code, or an Aztec code is conceivable.

[0060] In this optical information reading device 10, a circuit unit 20 is accommodated inside a casing 10A (see figure 2 ), the circuit unit 20 mainly includes optical systems such as an illumination light source 21, a logo light irradiation unit 22, a light receiving sensor 23...

no. 2 approach

[0078] Next, refer to image 3 , an optical information reading device according to a second embodiment of the present invention will be described.

[0079] Such as image 3 As shown, in this second embodiment, the main difference from the optical information reading device of the above-mentioned first embodiment is that the marking light irradiation unit 22 is arranged so that the marking light Lm approaches (approaches) the reflection mirror 24. The lower edge 24L (the edge portion closest to the imaging lens 25 among the outer edges).

[0080] As a result, the marking light Lm is irradiated closer to the substrate surface of the substrate 20a on which the light-receiving sensor 23 is mounted than the optical axis Lgr that is the center of the imaging range. Therefore, the gap of the optical system in the direction perpendicular to the substrate surface can be reduced. height, further miniaturization of the optical information reading device 10 can be realized.

no. 3 approach

[0082] Next, refer to Figure 4 , an optical information reading device according to a third embodiment of the present invention will be described.

[0083] Such as Figure 4 As shown, in this third embodiment, the main difference from the optical information reading device of the above-mentioned first embodiment is that the reflection mirror 24a is formed so that the entire surface of the reflection surface 24b is within the range of the imaging range of the light receiving sensor 23 roughly the same.

[0084] In this way, in the case where the entire reflective surface 24b of the reflective mirror 24a is formed to approximately coincide with the imaging range of the light receiving sensor 23, the size of the reflecting mirror 24a can be reduced without changing the imaging range of the light receiving sensor 23. Therefore, Compared with the first embodiment described above, the distance X between the optical axis Lgm and the optical axis Lgr becomes smaller, and the deviat...

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Abstract

To provide an optical information reading device capable of reducing displacement between the center of a marker light and the center of imaging range while ensuring small size. A marker light irradiation unit 22 is positioned away farther than a reflection mirror 24 with respect to a reading port 13 and is disposed so that the optical axis Lgm of the marker light Lm parallel to an optical axis Lgr as the center of imaging range of a reception sensor 23, and the marker light Lm is close to the upper edge 24U of a reflection mirror 24.

Description

technical field [0001] The present invention relates to an optical information reading device for optically reading information codes and the like. Background technique [0002] Conventionally, when information codes such as barcodes and QR codes (registered trademarks) are optically read, the target to be read with the information code is irradiated with a marker light showing the center of the imaging range, thereby facilitating reading of the information code. However, when the center of the imaging range is indicated by the indicator light, there is a problem that a large deviation occurs between the actual center of the imaging range and the center of the indicator light. This problem is more pronounced the smaller the distance between the reading object and the reading device. As one of the reasons for this problem, the following reason can be cited, that is, when the optical axis of the marking light is to be close to the optical axis that is the center of the imagin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10
CPCG06K7/10702G06K7/10722
Inventor 山本贤了伊藤诚
Owner DENSO WAVE INC
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