JP6888479B2 - Optical information reader - Google Patents

Description

The present invention relates to an optical information reader.

In recent years, with the spread of two-dimensional codes such as QR codes (registered trademarks), the need to read coupons and the like has increased at retail stores, while information codes are encrypted in public accommodation facilities, lockers, railways, and medical-related businesses. There are an increasing number of cases where it is introduced as a security measure, such as being used for use or for authenticity judgment. In such applications, some readers improve security by using invisible light such as infrared light in addition to the conventional visible light used as illumination light. In addition, visible light is normally used as illumination light, and in public places where many people can easily see the illumination light, it is used by switching to invisible light such as infrared light in order to prevent the feeling of dazzling. Often.

As described above, as a technique relating to an optical information reader using two types of illumination light, for example, the reader disclosed in Patent Document 1 below is known. This reader utilizes up-conversion generated by simultaneous irradiation of near-infrared light and infrared light from two different light sources, and is highly effective when receiving reflected light from a two-dimensional transparent bar code. It is possible to read a signal having an output and a high S / N ratio, and the information identification ability is improved.

Japanese Unexamined Patent Publication No. 2010-039958

By the way, in a reader equipped with both a light source that irradiates visible light and a light source that irradiates invisible light such as infrared light, the imaging field is usually limited due to restrictions on the arrangement of the light receiving sensor and each light source. The irradiation range of visible light and the irradiation range of invisible light with respect to (imaging field) are different. Therefore, when the state of being irradiated with visible light is switched to the state of being irradiated with invisible light, the irradiation range of invisible light cannot be visually recognized, so the irradiation range of being irradiated with visible light is read as a readable range. If this is done, the information code is not properly irradiated with invisible light, so that there is a problem that reading in the state of being irradiated with invisible light fails. This problem may occur even when the information code is irradiated with visible light and invisible light at the same time and the information code is read. In particular, when reading an information code located at a short distance, the positional deviation between the visible light irradiation range and the invisible light irradiation range becomes large, and the above problem becomes remarkable.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to cover both irradiation ranges even when both a light source that irradiates visible light and a light source that irradiates invisible light are mounted. An object of the present invention is to provide a configuration capable of suppressing a decrease in reading performance due to a deviation.

In order to achieve the above object, the invention according to claim 1 of the claims is
An optics provided with an area sensor (23) that receives the reflected light from the information code (C) on a rectangular light receiving surface (23a) and optically reads the information code based on a signal output from the area sensor. An information reading device (10)
A first light source (21) that irradiates visible light (Lf1) as illumination light toward the imaging field of view (AR) by the area sensor and a second light source (22) that irradiates invisible light (Lf2) are provided.
The first light source and the second light source are arranged in a line along the lateral direction of the light receiving surface.
The reference numerals in the parentheses indicate the correspondence with the specific means described in the embodiments described later.

In the invention of claim 1, an area sensor that receives the reflected light from the information code on a rectangular light receiving surface, a first light source that irradiates visible light as illumination light toward the imaging field of the area sensor, and invisible light. A second light source for irradiating light is provided, and the first light source and the second light source are arranged in a row along the lateral side of the light receiving surface.

As a result, the visible light irradiation range and the invisible light irradiation range are less likely to deviate in the longitudinal direction of the imaging field of view, which is rectangular according to the shape of the light receiving surface. Normally, when reading an information code that is long in one direction such as a barcode, the reading port is directed toward the information code so that the longitudinal direction of the information code coincides with the longitudinal direction of the imaging field of view, that is, the longitudinal direction of the reading port. become. In this state, since the visible light irradiation range and the invisible light irradiation range do not deviate in the longitudinal direction of the imaging field of view with respect to the information code, the reading generated because both irradiation ranges deviate in the longitudinal direction of the imaging field of view. Failure, for example, reading failure caused by invisible light being irradiated on one side in the longitudinal direction but not on the other side in the longitudinal direction can be suppressed. Therefore, even when both the first light source that irradiates visible light and the second light source that irradiates invisible light are mounted, it is possible to suppress the deterioration of reading performance due to the deviation of both irradiation ranges.

In the invention of claim 2, the first light source and the second light source are arranged so that the light receiving optical axis of the area sensor is located between the first light source and the second light source. As a result, the center of the imaging field of view, the center of the visible light irradiation range, and the center of the invisible light irradiation range are brought closer to coincide with each other in the lateral direction of the imaging field of view. It can be made smaller and the reading performance can be improved.

In the invention of claim 3, the first light source and the second light source are arranged so as to be displaced in the longitudinal direction of the light receiving surface with respect to the imaging lens. As a result, even if the first light source and the second light source are arranged so as to be close to each other in the lateral direction of the light receiving surface, they do not interfere with the imaging lens, so that the first light source and the second light source are brought close to each other. It is possible to reduce the size of the device by arranging it.

In the invention of claim 4, since the first light source and the second light source are mounted on the same substrate, not only the positional deviation between the first light source and the second light source can be suppressed, but also the first light source and the second light source can be suppressed. It becomes easy to arrange and compactly, and the size of the device can be reduced.

In the invention of claim 5, since the illumination lens used for the first light source and the illumination lens used for the second light source are integrally molded, not only the number of parts of the illumination lens can be reduced, but also the first light source and the second light source can be reduced. It becomes easy to arrange the light source compactly, and the device can be miniaturized.

In the invention of claim 6, the first light source and the second light source are arranged so that the irradiation range by the first light source is located below the irradiation range by the second light source when viewed from the user.
Normally, when the reading port is directed to the information code displayed on the predetermined display surface, the user performs the reading operation while looking at the information code through the reading port, so that the predetermined display surface is directed to the light receiving optical axis. The upper side tends to be relatively inclined so as to be away from the reading port. In this state, the folded field through the predetermined display surface is on the upper side of the light receiving light axis, so that the first light source that irradiates visible light whose light intensity is stronger than that of invisible light is the light receiving light axis for that purpose. If it is located on the upper side with respect to the above, the first light source can easily enter the folded field. That is, since the visible light reflected on the predetermined display surface is easily reflected, the reading performance may be deteriorated if the visible light is reflected on the captured information code.

Therefore, by arranging the first light source and the second light source so that the irradiation range by the first light source is located below the irradiation range by the second light source when viewed from the user, the first light source and the second light source are arranged through the predetermined display surface. It becomes difficult for the first light source to enter the folded field of view, and it is possible to suppress a decrease in reading performance due to reflection of visible light having a strong light intensity.

It is a perspective view which shows typically the optical information reading apparatus which concerns on 1st Embodiment of this invention. It is a right side view of the optical information reading apparatus of FIG. It is a front view of the optical information reading apparatus of FIG. FIG. 5 is a block diagram schematically showing an electrical configuration of the optical information reader of FIG. 1. It is explanatory drawing which explains the positional relationship between the 1st light source and the area sensor seen from the 1st light source side in the direction orthogonal to the light receiving optical axis in 1st Embodiment. It is explanatory drawing explaining the positional relationship between both light sources and an area sensor seen from the reading port side in 1st Embodiment. It is explanatory drawing explaining the angle between the information code of a predetermined display surface and an optical information reading device at the time of a reading operation, and FIG. 7A is the case of reading the information code of a predetermined display surface on a label or the like on hand. 7 (B) shows a case where the information code C on a predetermined display surface on a label or the like on a desk is read. It is explanatory drawing explaining the relationship between the folded-out field of view and the light receiving optical axis through a predetermined display surface, and FIG. 8A shows a state in which the first light source is located lower than the light receiving optical axis. FIG. 8B shows a state in which the first light source is located above the light receiving optical axis. 9 (A) is an explanatory diagram for explaining an imaging state in which the information code is imaged in the state of FIG. 8 (A), and FIG. 9 (B) shows the information code in the state of FIG. 8 (B). It is explanatory drawing explaining the imaging state which imaged. It is explanatory drawing explaining the positional relationship between a 1st light source and an area sensor seen from the 1st light source side in the direction orthogonal to the light receiving optical axis in 2nd Embodiment. It is explanatory drawing explaining the positional relationship between both light sources and an area sensor seen from the reading port side in 2nd Embodiment.

[First Embodiment]
Hereinafter, the optical information reading device according to the first embodiment of the present invention will be described with reference to the drawings.
The optical information reading device 10 shown in FIGS. 1 to 4 is configured as a code reader that optically reads one or more information codes (one-dimensional code, two-dimensional code, etc.), and is a so-called gun type. The circuit unit 20 made of various electric parts and the like is housed inside the case 11 made of a synthetic resin such as ABS resin.

As shown in FIGS. 1 to 3, the optical information reading device 10 has a main body 12 having a reading port 13 formed at an end thereof for passing illumination light and its reflected light, and a reading port 13 in the main body 12. It is provided with a grip portion 15 which is connected to a portion different from the portion where the is formed and is gripped by the user. As shown in FIG. 3, the reading port 13 is formed so as to open in a substantially rectangular shape so that the length in the left-right direction is shorter than the length in the up-down direction. An extension portion 14 is provided at the lower part of the reading port 13 in the main body portion 12, and the extension portion 14 can provide information even if the extension end portion 14a is brought into contact with a reading target to which an information code is attached. It is formed so as to have a substantially U shape with an open upper portion so that the cord and the marker light described later can be visually recognized from above. The grip portion 15 extends downward from the lower wall portion of the main body portion 12, a trigger switch 42 capable of pressing operation is arranged near the upper end portion of the grip portion 15, and an interface is provided near the lower end portion of the grip portion 15. The structure is such that a cable for use (not shown) can be assembled.

Next, the electrical configuration of the optical information reader 10 will be described with reference to FIG.
As shown in FIG. 4, the circuit unit 20 housed in the case 11 mainly includes an optical system such as a first light source 21, a second light source 22, an area sensor 23, and an imaging lens 25, a memory 35, and a control unit. It is equipped with a 40-class microcomputer (hereinafter referred to as "microcomputer") system.

The optical system is divided into a floodlight optical system and a light receiving optical system. The floodlight optical system is configured to include a first light source 21 and a second light source 22 as a pair of light sources. The first light source 21 is configured to include, for example, an LED 21a that irradiates visible light Lf1 having a wavelength of 380 nm to 750 nm and an illumination lens provided on the emission side of the LED 21a. Further, the second light source 22 is configured to include an LED 22a that irradiates invisible invisible light Lf2 such as infrared light having a wavelength of 750 nm or more, and an illumination lens provided on the emission side of the LED 22a.

The light receiving optical system is composed of an area sensor 23, an imaging lens 25, and the like. The area sensor 23 is configured to be capable of imaging the information code C as a light receiving sensor having a rectangular light receiving surface 23a in which light receiving elements that are solid-state imaging elements such as C-MOS and CCD are arranged in two dimensions. Yes, each cell (pattern) of the received information code is configured to output an electric signal according to the intensity of the reflected light Lr. The area sensor 23 is mounted on the sensor substrate 51 so as to be able to receive the incident light incident on the imaging lens 25.

The imaging lens 25 is configured to have one or more lenses, and collects incident light incident from the outside through the reading port 13 to form an image on the light receiving surface 23a of the area sensor 23. It functions as a possible imaging optical system. In the present embodiment, the information code C and the reflected light Lr from the predetermined display surface R to which the information code C is attached are collected by the imaging lens 25, and the code image is formed on the light receiving surface 23a of the area sensor 23. I'm letting you. The detailed arrangement configuration of the optical system configured in this way will be described later.

The microcomputer system includes an amplifier circuit 31, an A / D conversion circuit 33, a memory 35, an address generation circuit 36, a synchronization signal generation circuit 38, a control unit 40, a trigger switch 42, a light emitting unit 43, a buzzer 44, a vibrator 45, and a communication interface 48. And so on.

The image signal (analog signal) output from the area sensor 23 of the optical system is amplified with a predetermined gain by being input to the amplifier circuit 31, and then input to the A / D conversion circuit 33 to be a digital signal from the analog signal. Is converted to. Then, the digitized image signal, that is, image data (image information) is input to the memory 35 configured by a known storage medium such as a ROM or RAM, and is stored in a predetermined storage area. The synchronization signal generation circuit 38 is configured to be capable of generating a synchronization signal for the area sensor 23 and the address generation circuit 36, and the address generation circuit 36 is based on the synchronization signal supplied from the synchronization signal generation circuit 38. Therefore, the storage address of the image data stored in the memory 35 can be generated.

The control unit 40 is a microcomputer capable of controlling the entire optical information reading device 10, and includes a CPU, a system bus, an input / output interface, and the like. It can form an information processing device together with a memory 35 and has an information processing function. .. The control unit 40 functions to perform decoding processing (decoding) on the code image of the information code imaged by the area sensor 23 and stored in the memory 35. Further, the control unit 40 is configured to be connectable to various input / output devices via a built-in input / output interface. In the case of this embodiment, the trigger switch 42, the light emitting unit 43, the buzzer 44, the vibrator 45, and the like. A communication interface 48 or the like is connected. As a result, for example, monitoring and management of the trigger switch 42, lighting / non-lighting of the light emitting unit 43, on / off of the sound of the buzzer 44 capable of generating a beep sound or an alarm sound, drive control of the vibrator 45, control of the communication interface 48, etc. Is possible.

Next, the detailed arrangement configuration and the like of the optical system provided as described above will be described in detail with reference to FIGS. 5 to 9. In addition, the lateral direction of the light receiving surface 23a is defined as the X direction, the longitudinal direction of the light receiving surface 23a is defined as the Y direction, and the direction orthogonal to both the X direction and the Y direction (light receiving optical axis direction) is defined as the Z direction.

In the optical system of this embodiment, the sensor board 51 on which the area sensor 23 is mounted, the first lighting board 52 on which the LED 21a is mounted, the second lighting board 53 on which the LED 22a is mounted, and the like are fixed at predetermined positions of the holder 50. ing. As a result, the first light source 21, the second light source 22, the area sensor 23, and the imaging lens 25 are arranged in the positional relationship shown in FIGS. 5 and 6.

More specifically, as shown in FIG. 6, the first light source 21 and the second light source 22 are arranged in a row along the lateral direction (X direction) of the light receiving surface 23a, and the first light source 21 and the second light source 22 are in a row. By arranging the imaging lens 25 at positions equidistant from the two light sources 22, the light receiving optical axis L of the area sensor 23 is arranged between the first light source 21 and the second light source 22. To. Therefore, the light receiving optical axis L, the light projecting axis L1 of the first light source 21, and the light projecting axis L2 of the second light source 22 coincide with each other in the lateral direction of the light receiving surface 23a. That is, the first light source 21 and the second light source 22 are arranged so that the distance from the LED 21a to the light receiving optical axis L and the distance from the LED 22a to the light receiving optical axis L are equal.

In the holder 50 to which the sensor substrate 51, the first illumination substrate 52, the second illumination substrate 53, etc. are fixed in the positional relationship as described above, the longitudinal direction (Y direction) of the light receiving surface 23a is the left-right direction of the reading port 13. It is housed in the case 11 so as to be substantially parallel. As a result, the imaging field AR of the area sensor 23, which becomes rectangular according to the shape of the light receiving surface 23a, has a longitudinal direction in the left-right direction as in the reading port 13, and the irradiation range of visible light Lf1 and irradiation of invisible light Lf2. The range is a state in which the center positions are substantially aligned in the left-right direction and are difficult to shift, and are shifted in the vertical direction.

Normally, when reading an information code that is long in one direction such as a barcode, the reading port 13 is used as the information code so that the longitudinal direction of the information code coincides with the longitudinal direction of the imaging field AR, that is, the longitudinal direction of the reading port 13. It will be in a facing state. Therefore, unlike the present embodiment, if both irradiation ranges are deviated in the longitudinal direction of the imaging field AR, for example, invisible light Lf2 is irradiated on one side in the longitudinal direction of the barcode while on the other side in the longitudinal direction. Reading may fail because it is not irradiated.

In response to this problem, in the present embodiment, since the irradiation range of visible light Lf1 and the irradiation range of invisible light Lf2 do not deviate in the longitudinal direction of the imaging field AR with respect to the information code C, both irradiation ranges are the imaging field AR. It is possible to suppress the above-mentioned reading failure and the like caused by the deviation in the longitudinal direction of the above.

In particular, in the present embodiment, the first light source 21 and the second light source 22 are arranged so that the irradiation range by the first light source 21 is located below the irradiation range by the second light source 22 when viewed from the user. .. That is, the holder 50 is housed in the case 11 so that the first light source 21 is located below the second light source 22.

Here, the reason why the first light source 21 is located below the second light source 22 as described above will be described with reference to FIGS. 7 to 9.
Normally, when the reading port 13 is directed to the information code C displayed on the predetermined display surface R such as a label, the user performs the reading operation while looking at the information code C through the reading port 13. Therefore, for example, when the information code C of the predetermined display surface R on the hand-held label or the like is read as shown in FIG. 7A, or as shown in FIG. 7B, the predetermined display surface on the desk label or the like is read. As in the case of reading the information code C of R, the predetermined display surface R tends to be in a relatively inclined state so that the upper side thereof is separated from the reading port 13 with respect to the light receiving optical axis L.

In this state, since the folded field AR1 via the predetermined display surface R is on the upper side with respect to the light receiving light axis L with respect to the imaging field AR, as shown in FIG. 8B, the light intensity is invisible due to its use. When the first light source 21 that irradiates the visible light Lf1 that is stronger than the light Lf2 is located above the light receiving optical axis L, the first light source 21 can easily enter the folded field AR1. That is, since the visible light Lf1 reflected on the predetermined display surface R is easily reflected, as shown in FIG. 9B, if the visible light Lf1 is reflected on the captured information code C, the reading performance is high. May decrease.

Therefore, in order to position the first light source 21 below the light receiving optical axis L, the irradiation range by the first light source 21 is located below the irradiation range by the second light source 22 when viewed from the user. The first light source 21 and the second light source 22 are arranged (see FIG. 6). As a result, as shown in FIG. 8A, it becomes difficult for the first light source 21 to enter the folded field of view AR1 via the predetermined display surface R, and as shown in FIG. 9A, the imaged information code C is displayed. Visible light Lf1 is not reflected in the image, and deterioration of reading performance due to reflection of visible light Lf1 having a strong light intensity can be suppressed.

As described above, in the optical information reading device 10 according to the present embodiment, the area sensor 23 that receives the reflected light from the information code C on the rectangular light receiving surface 23a and the imaging field AR by the area sensor 23. A first light source 21 that irradiates visible light Lf1 and a second light source 22 that irradiates invisible light Lf2 are provided as illumination light, and the first light source 21 and the second light source 22 are short of the light receiving surface 23a. They are arranged in a row along the hand direction (X direction).

As a result, the irradiation range of visible light Lf1 and the irradiation range of invisible light Lf2 are less likely to shift in the longitudinal direction of the imaging field AR with respect to the imaging field AR which becomes rectangular according to the shape of the light receiving surface 23a, and both irradiations are performed. It is possible to suppress reading failure caused by the range being shifted in the longitudinal direction of the imaging field AR. Therefore, even when both the first light source 21 that irradiates the visible light Lf1 and the second light source 22 that irradiates the invisible light Lf2 are mounted, it is possible to suppress the deterioration of the reading performance due to the deviation of both irradiation ranges.

Further, the first light source 21 and the second light source 22 are arranged so that the light receiving optical axis L of the area sensor 23 is located between the first light source 21 and the second light source 22. As a result, the center of the imaging field of view AR, the center of the irradiation range of visible light Lf1 and the center of the irradiation range of invisible light Lf2 come close to coincide with each other in the lateral direction of the imaging field of view AR. The deviation from the range can be further reduced, and the reading performance can be improved.

In particular, the first light source 21 and the second light source 22 are arranged so that the irradiation range of the first light source 21 is located below the irradiation range of the second light source 22 when viewed from the user. As a result, as described above, it becomes difficult for the first light source 21 to enter the folded field of view AR1 via the predetermined display surface R, and the deterioration of reading performance due to the reflection of visible light Lf1 having strong light intensity can be suppressed. it can.

[Second Embodiment]
Next, the optical information reading device according to the second embodiment will be described with reference to FIGS. 10 and 11.
The second embodiment is mainly different from the first embodiment in that the first light source 21 and the second light source 22 are mounted on the same substrate.

Specifically, as shown in FIGS. 10 and 11, by mounting the LED 21a and the LED 22a on the lighting substrate 54, the first light source 21 and the second light source 22 are in the lateral direction (X) of the light receiving surface 23a. The light receiving surface 23a is displaced from the imaging lens 25 in the longitudinal direction (Y direction) and is close to each other in a line along the direction), and the distance from the LED 21a to the light receiving optical axis L and the light receiving optical axis from the LED 22a. It is arranged so that the distance to L is equal. In particular, in the present embodiment, since the first light source 21 and the second light source 22 are arranged close to each other in this way, the illumination lens of the first light source 21 and the illumination lens of the second light source 22 are integrally molded. The lens 27 is adopted. In addition, in FIG. 10 and FIG. 11, the approximate position of the illumination lens 27 is shown by a broken line.

As described above, the first light source 21 and the second light source 22 are arranged so as to be displaced in the longitudinal direction of the light receiving surface 23a with respect to the imaging lens 25, so that the first light source 21 and the second light source 22 are arranged so as to be displaced in the longitudinal direction of the light receiving surface 23a. Even if the light source 21 and the second light source 22 are arranged so as to be close to each other in the lateral direction of the light receiving surface 23a, they do not interfere with the imaging lens 25. As a result, the optical information reading device 10 can be miniaturized along with the space saving of the holder 50 by arranging the first light source 21 and the second light source 22 so as to be close to each other.

Further, since the first light source 21 and the second light source 22 are mounted on the same lighting substrate 54, not only the positional deviation between the first light source 21 and the second light source 22 can be suppressed, but also the first light source 21 and the second light source 22 can be suppressed. The two light sources 22 can be easily arranged compactly, and the optical information reading device 10 can be miniaturized.

In particular, since the illumination lens used for the first light source 21 and the illumination lens used for the second light source 22 are integrally molded as the illumination lens 27, not only the number of parts of the illumination lens can be reduced, but also the first light source 21 and the illumination lens The second light source 22 can be easily arranged compactly, and the optical information reading device 10 can be miniaturized.

The configuration in which the first light source 21 and the second light source 22 are mounted on the same substrate, the configuration in which the illumination lens used for the first light source 21 and the second light source 22 are integrally molded, and the like are also applied to other embodiments and the like. can do.

The present invention is not limited to the above embodiments and modifications, and may be embodied as follows, for example.

(1) As shown in FIGS. 6 and 11, the first light source 21 is not limited to be arranged so as to be located below the second light source 22, and for example, a folded field of view via a predetermined display surface R is used. In a reading work environment or the like in which AR1 tends to be below the light receiving optical axis L, the first light source 21 may be arranged so as to be located above the second light source 22.

(2) When the first light source 21 and the second light source 22 are arranged in a row along the lateral direction (X direction) of the light receiving surface 23a, as described above, the distance from the LED 21a to the light receiving optical axis L and from the LED 22a The distance from the LED 21a to the light receiving optical axis L is not limited to being equal to the distance to the light receiving optical axis L, and the distance from the LED 22a to the light receiving optical axis L may be longer than the distance from the LED 22a to the light receiving optical axis L. Alternatively, conversely, the distance from the LED 22a to the light receiving optical axis L may be longer than the distance from the LED 21a to the light receiving optical axis L.

(3) The present invention is not limited to being applied to an optical information reader having a gun-type appearance, and an optical information reader having various appearances, for example, optical information having a substantially box-like appearance. It may be applied to a reader. Further, the present invention is not limited to being applied to an optical information reading device that optically reads an information code, and is an optical that optically reads character information or the like by using a known symbol recognition processing function (OCR). It may be applied to an information reading device, or is applied to an information reading device having another function in addition to the function of optically reading an information code or the like, for example, a wireless communication function for wireless communication with a wireless communication medium. You may.

10 ... Optical information reader 21 ... 1st light source 22 ... 2nd light source 23 ... Area sensor 23a ... Light receiving surface 25 ... Imaging lens AR ... Imaging field of view AR1 ... Folded field of view C ... Information code L ... Light receiving optical axis Lf1 ... Visible Light Lf2 ... Invisible light R ... Predetermined display surface

Claims (6)

An optical information reading device comprising an area sensor that receives light reflected from an information code on a rectangular light receiving surface, and optically reading the information code based on a signal output from the area sensor.
A first light source that irradiates visible light as illumination light and a second light source that irradiates invisible light toward the field of view imaged by the area sensor are provided.
An optical information reading device, wherein the first light source and the second light source are arranged in a row along the lateral direction of the light receiving surface. The first light source and the second light source according to claim 1, wherein the first light source and the second light source are arranged so that the light receiving optical axis of the area sensor is located between the first light source and the second light source. Optical information reader. An imaging lens that collects the reflected light from the information code and forms an image on the light receiving surface is provided.
The optical information reading device according to claim 1, wherein the first light source and the second light source are arranged so as to be displaced in the longitudinal direction of the light receiving surface with respect to the imaging lens. The optical information reading device according to any one of claims 1 to 3, wherein the first light source and the second light source are mounted on the same substrate. The optical information reading device according to any one of claims 1 to 4, wherein the illumination lens used for the first light source and the illumination lens used for the second light source are integrally molded. .. The claim is characterized in that the first light source and the second light source are arranged so that the irradiation range by the first light source is located below the irradiation range by the second light source when viewed from the user. The optical information reading device according to any one of 1 to 5.

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