JP2000011083A - Optical information reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to read out an object of any size without complicating or expanding the constitution of the optical information reader by utilizing a conventional basic device constitution as it is. SOLUTION: A reading port to be externally engaged with a case 11 is allowed to be substituted by a reading port 22 having an image forming lens 23. The lens 23 of the port 22, an image forming lens 14 and a reflector 15 constitute an optical system having an optical characteristic different front that of an optical system constituted only of the lens 14 and the reflector 15. The reading port can be substituted also by a reading port having a red light emitting diode for aiding illumination. The diode is connected to a signal line for case 11 side illumination to emit light and a microcomputer in a data processing output part 16 can turn off only a red light emitting diode 12 for illumination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information reading apparatus which irradiates a reading object such as a two-dimensional code label with light and reads an image of the reading object from the reflected light.

[0002]

2. Description of the Related Art Heretofore, reflected light of light emitted from a light emitting means such as a light emitting diode to a reading object such as a two-dimensional code label is imaged on an optical sensor by an imaging lens, and is then applied to the optical sensor. There is known an optical information reading apparatus for reading two-dimensional code data which is image data of a two-dimensional code label.

Normally, such an optical information reading device is illuminated from a light emitting means with a reading port provided in a case of the optical information reading device almost in contact with the two-dimensional code label, and is illuminated from the two-dimensional code label. The imaging lens is adjusted so that the reflected light forms an image on the optical sensor.

[0004]

Here, an object to be read by the optical information reading apparatus will be considered. For example, the two-dimensional code label to be read has various areas having different sizes, such as the size of the area, and the intervals between the elements constituting the code, for example, when the two-dimensional code is composed of dots of a predetermined area. There are things.

Therefore, the object to be read can be specified by the optical characteristics of the optical system mainly including the imaging lens of the optical information reading apparatus. In other words, there is a reading target that cannot be read using the same optical system. For example, if the two-dimensional code label is larger than the reading opening, it is necessary to read the two-dimensional code label away from the reading opening. A so-called blur occurs in the image formation on the sensor, and the image cannot be read. In addition, since the irradiation light from the light emitting unit described above is dispersed and irradiated, when exceeding a predetermined distance,
Light applied to the label surface is weakened, and the reading accuracy is reduced.

In addition, when the imaging lens forms an image of a two-dimensional code label on an optical sensor at a predetermined magnification such as 1/10, for example, if the distance between the elements constituting the two-dimensional code becomes small. It is conceivable that the element interval of the two-dimensional code in the image formation on the optical sensor is smaller than the array interval of the light receiving elements. In this case, the optical sensor cannot determine the interval between elements constituting the two-dimensional code, and cannot read the two-dimensional code. That is, the resolution exceeds the resolution of the optical information reading device.

Further, depending on the material of the two-dimensional code label and the irradiation angle of the light from the light emitting means, it is conceivable that the irradiated light causes so-called specular reflection on the label surface. At this time, the two-dimensional code label cannot be read. As described above, if one optical system is used, there are two-dimensional code labels that cannot be read. Therefore, it is necessary to prepare a plurality of optical information reading devices according to the size, fineness, material, and the like of the reading target.

As one method for solving such a problem, for example, an optical information reading apparatus is provided with a structure having a plurality of types of imaging lenses and light emitting means adapted to various reading targets, and the plurality of types of imaging lenses and It is conceivable to switch the light emitting means by using a switch or the like attached to the device. For example, the field of view, the imaging magnification, and the like are changed by switching the imaging lens, or only some of the plurality of light emitting units are turned on so that specular reflection does not occur.

However, considering that a plurality of imaging lenses and light-emitting means are provided in the apparatus so as to be able to read any object to be read, especially in a handy type optical information reading apparatus, the configuration becomes complicated and the size becomes large. Is not preferred in that it leads to In addition, it is necessary to redesign the basic configuration of the device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. What is needed is to use a conventional basic device configuration as it is, without complicating or enlarging the device configuration. A first object is to be able to read an object having a large size, and a second object is to realize an appropriate amount of light and an irradiation angle for reading.

[0011]

According to the first aspect of the present invention, there is provided an optical information reading apparatus, wherein a light emitting unit irradiates light to a reading object. For example, a light emitting diode may be used as the light emitting means. For example, a predetermined number of light-emitting diodes such as four are provided inside the apparatus, and at the time of reading, these diodes are turned on to irradiate light to a reading target. The light from the light emitting means is applied to the object to be read through a reading opening provided in the case of the apparatus, is reflected by the reading object, and enters the case again through the same reading opening. The reflected light is received by the optical sensor, and as a result, the image to be read is read as data. At this time, the image forming means at least reflects the reflected light from the read object by the first imaging lens. Is imaged on an optical sensor. Here, the optical sensor may be, for example, a CCD area sensor. Further, the first imaging lens is usually configured as a group lens in which a plurality of lenses are grouped. It should be noted that a two-dimensional code or a barcode can be considered as the reading target. In addition, it is conceivable that this apparatus reads an object to be read in the vicinity of the reading port, or it is possible to read a reading object several tens of cm (for example, 30 to 50 cm) away from the vicinity of the reading port. .

In the optical information reading apparatus according to the first aspect of the present invention, a user selectively attaches a reading port having a second imaging lens that forms imaging means together with the first imaging lens. It is configured to be able to. Attachment of the reading port can be considered to be a configuration in which a reading port having a second imaging lens is further attached to the original reading port, and the reading port is replaced and replaced with the original reading port. It is also conceivable that the reading port having the second imaging lens is attached. Note that the reading port is generally a rubber member or the like that is externally fitted to the case body of the optical information reading device, and replacing the reading port portion means replacing this member. It is.
Here, the second imaging lens may be a single lens similarly to the first imaging lens, or may be a group lens in which a plurality of lenses are grouped.

The second imaging lens forms an imaging means together with the first imaging lens. That is, by attaching the reading port having the second imaging lens, the imaging means forms the reflected light from the reading object on the optical sensor by the first and second imaging lenses. That is, if a reading port having the second imaging lens is attached, an optical system different from the optical system including only the first imaging lens is configured. Therefore, if a reading port having a second imaging lens that forms an optical system that forms an image of the reading target on an optical sensor according to the size and fineness of the reading target is prepared, By attaching the reading port, the reading target can be read.

In the present invention, since the second imaging lens for changing the characteristics of the optical system is provided in the reading port and the reading port is selectively attached, the configuration of the apparatus becomes complicated and the size becomes large. There is no. Also, the basic configuration of the conventional device,
For example, it is advantageous in that it can be applied without changing the configuration of the optical system. For example, the present invention can also be applied to currently commercialized optical information reading devices, and a user simply purchases a new reading opening corresponding to the size and fineness of a reading target and attaches the reading opening. It is possible to read a two-dimensional code that is larger or finer than the two-dimensional code.

Next, the second object described above, that is, the amount of light and the irradiation angle suitable for reading without using a conventional basic device configuration without complicating or enlarging the device configuration. An optical information reading apparatus made to achieve the object of realizing the above will be described. This optical information reading device is realized by the configuration described in claim 2.
The prerequisite device is the same as that described in claim 1.

That is, in the optical information reading apparatus according to the second aspect, the light emitting means irradiates light to the object to be read. For example, a light emitting diode may be used as the light emitting means. The light from the light emitting means is applied to the object to be read through a reading opening provided in the case of the apparatus, is reflected by the reading object, and enters the case again through the same reading opening. The reflected light forms an image on the optical sensor by the image forming unit, and as a result, an image to be read is read as data.

In the optical information reading apparatus according to the present invention, a user selectively attaches a reading port having a second light emitting means used together with or in place of the above light emitting means. It is configured to be able to. Similar to the above description of the optical information reading apparatus according to the first aspect, attaching the reading port may be a configuration in which a reading port having a second light emitting unit is further attached to the original reading port. Alternatively, it is conceivable that the reading port is replaced and a reading port having a second light emitting means is attached in place of the original reading port.

The second light emitting means is used together with or instead of the light emitting means in the apparatus. For example, if a reading port having a second light-emitting means that is turned on together with the light-emitting means is attached, it is possible to compensate for a shortage of light amount when the reading object becomes large. For example, when the size of the label is increased, it is conceivable that the illuminance distribution on the label surface is biased only by the light emitting means in the apparatus, and a dark portion is formed on the label surface. In such a case, the second light emitting means is used together with the light emitting means in the apparatus, and a reading port having a light emitting means for illuminating a dark portion of the label surface is attached. On the other hand, if a reading port having a second light-emitting means that is turned on instead of the light-emitting means is attached, it is possible to eliminate the influence of specular reflection and the like. For example,
When light from the light emitting means in the apparatus is specularly reflected on the label surface, the light emitting means in the apparatus is turned off and the second light source provided in the reading port is turned off.
By turning on the light emitting means, the irradiation angle of light is changed. In other words, if a reading port for realizing the light amount and the irradiation angle according to the reading target is prepared, the reading target can be reliably read by attaching the reading port.

A second light emitting means is provided in the reading port,
Since the reading port is selectively attached, the apparatus configuration does not become complicated and large. It is also advantageous in that it can be applied without changing the basic configuration of a conventional device, for example, the configuration of an optical system. For example, the present invention can also be applied to currently commercialized optical information reading devices,
By simply purchasing a new reading opening corresponding to the reading target and attaching the reading opening, reading can be performed with an appropriate amount of light and an irradiation angle suitable for the reading target.

As described above, the optical information reading device according to the first aspect is such that a reading port having an imaging lens can be attached thereto, while the optical information reading device according to the second aspect has a light emitting means. The reading port having the image forming lens and the light-emitting means can be attached to the optical information reading apparatus. It is also possible.

That is, the configuration is such that a light emitting means for irradiating light to the object to be read, and light emitted by the light emitting means through the reading opening and reflected by the reading object is received through the reading opening. An optical information reading apparatus comprising: an optical sensor; and imaging means for imaging reflected light from an object to be read on the optical sensor by at least a first imaging lens. The second constituting means
And a reading port having a second light emitting means used together with or instead of the light emitting means can be selectively attached by a user. Things.

With such an optical information reading device,
It is possible to read objects to be read having different sizes or fineness, and it is possible to read any two-dimensional code label.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory diagram of an optical information reading device 10 as an embodiment to which the above-described invention is applied.

In this embodiment, the optical information reading device 1
Numeral 0 denotes a two-dimensional code reader handy terminal. FIG. 2 shows an optical information reading apparatus 1.
It is a block diagram of a control system of No. 0. Optical information reader 1
0 is case 11, reading unit 17, data processing output unit 1
6 and a power supply unit 18.

A reading unit 17 is provided inside the front part of the case 11.
Are arranged, and a rear portion of the case 11 forms a grip portion 11a for an operator to grip with a hand. A reading port 20 is externally fitted to a lower portion of a front portion of the case 11 and is screwed with a screw (not shown). The reading port 20 is formed of a synthetic resin or the like. The reading port 20 has an opening having a substantially square shape, and the reading port 20 is a target to be read.
While almost in contact with the two-dimensional code label 50a, the image of the two-dimensional code label 50a is read by the reflected light of the two-dimensional code label 50a incident from the opening.

The reading unit 17 includes an illumination red light emitting diode 12 as “light emitting means”, a light emission driving circuit 28, a reflecting mirror 15, an image forming lens 14 as “first image forming lens”,
And an optical sensor 13 as an “optical sensor”. When the illumination red light emitting diode 12 emits light by the light emission drive circuit 28, the red light passes through the opening of the reading port 20 and the two-dimensional code label 5 outside the case 11.
Irradiate 0a.

The red light reflected by the two-dimensional code label 50a enters the case 11 again through the reading port 20, is reflected by the reflecting mirror 15, passes through a stop (not shown), and is composed of a plurality of sheets. Through the formed imaging lens 14, the light receiving element forms an image on the optical sensor 13 arranged two-dimensionally. The optical sensor 13 that has read the image of the two-dimensional code label 50a by photoelectrically converting the image is output to the data processing output unit 16 as an electric signal representing the pattern of the image.
As described above, the optical system including the reflecting mirror 15 and the imaging lens 14 is configured to form the reflected light from the two-dimensional code label 50 a in a state almost in contact with the reading port 20 on the optical sensor 13. I have.

As shown in FIG. 2, an amplifying circuit 41, a memory 42,
Value circuit 43, microcomputer 44, and output circuit 46 to a main unit such as a register or a host computer.
Is provided. The data processing output unit 16 includes the reading unit 1
When two-dimensional code data, which is an image of a two-dimensional code label from 7, is input via the amplifying circuit 41 and the binarizing circuit 43, the data is decoded (decoded) by the processing of the microcomputer 44 and the label , And temporarily stores the information in the memory 42. Next, the information stored in the memory 42 is transmitted by the output circuit 46 to the main unit as a serial signal via the data output signal line 19. In this embodiment, wired communication is used, but wireless communication using light or radio waves may be used.

The portion where the reading section 17 is stored is
A buzzer device 48 (see FIG. 2) at a position that does not affect the optical path
Is provided, and when the microcomputer 44 successfully decodes the two-dimensional code, the buzzer device 48 sounds. The microcomputer 44
It includes a well-known CPU, ROM, RAM, I / O, and the like, and executes necessary processing as the data processing output unit 16 described above.

The illumination red light emitting diode 12 shown in FIG.
As shown in FIG. 2, it is actually composed of four red light emitting diodes 12 a, 12 b, 12 c, and 12 d for illumination. Is irradiated on the two-dimensional code label 50a existing in the.

The optical information reading apparatus 10 of this embodiment has the basic functions as described above. Here, a two-dimensional code label to be read by the optical information reading apparatus 10 will be considered. The two-dimensional code label to be read has a difference in the size of the area and the intervals of the elements constituting the code, for example, when the two-dimensional code is composed of dots of a predetermined area, the size of the intervals of the dots differs. There are various things.

Therefore, the type of the two-dimensional code label that can be read is specified by the optical characteristics of the optical system mainly including the imaging lens 14 of the optical information reading device 10. Therefore, there is a two-dimensional code label that cannot be read by the same optical system.

For example, if the two-dimensional code label is
If the two-dimensional code label is separated from the reading opening 20, it becomes necessary to read the two-dimensional code label. So-called blur occurs, and reading becomes impossible. In addition, since the irradiation light from the above-described illumination red light emitting diode 12 is dispersed and irradiated, if the distance exceeds a predetermined distance, the light irradiated on the label surface becomes weak and reading becomes impossible.

When the imaging lens 14 forms an image of the two-dimensional code label on the optical sensor 13 at a predetermined magnification such as 1/10, for example, the interval between the elements constituting the two-dimensional code is small. If so, it is conceivable that the element interval of the two-dimensional code in the imaging by the imaging lens 14 on the optical sensor 13 becomes smaller than the arrangement interval of the light receiving elements. In this case, the optical sensor 13 cannot determine the interval between the elements constituting the two-dimensional code,
The two-dimensional code label cannot be read. That is, the resolution of the optical information reading device 10 is exceeded.

In view of such a point, in the present embodiment, as shown in FIG. 3, the reading opening 20 externally fitted to the case 11 in FIG. 1 is formed as a "second imaging lens". Lens 2
3 can be replaced with a reading port 22 having the same. The optical information reading apparatus 10 shown in FIG. 3 shows a state in which only the reading port 20 of the optical information reading apparatus 10 shown in FIG. 1 is replaced with a reading port 22 having an imaging lens 23. The optical information reading apparatus 10 shown in FIG.
Is the same as Therefore, the reference numerals for the same components are shown as they are. In FIG. 3, the optical information reading device 10 is also used.

In FIG. 3, an imaging lens 23 has an optical system having optical characteristics different from those of the optical system constituted by the imaging lens 14 and the reflection mirror 15 shown in FIG. Is configured. That is, the imaging lens 23 changes the object-image distance and the imaging magnification, which are characteristics of the optical system of the optical information reading apparatus 10. In the case where only the imaging lens 14 in FIG. 1 is used, for example, when an image of a two-dimensional code label is imaged at 1/5, if the imaging lens 23 in FIG. That is, the image of the code label is formed at 1/10 times. Therefore, if such a reading port is prepared in accordance with various two-dimensional code labels, the size and fineness of the reading port are different by using only one optical information reading apparatus 10 and replacing only the reading port. A two-dimensional code label can be read.

Next, the configuration of the reading port 22 will be described. FIG.
(A) has shown the sectional view on the AA line of FIG. A screw hole 22a is formed in a fitting portion 22b of the reading opening 22 with the case 11. On the other hand, a screw hole corresponding to the fitting portion of the case 11 is also formed (not shown), and the reading port 22 is externally fitted to the case 11 and is not shown via the screw hole 22a. Screwed and fixed by screws. In the reading opening 22, a meniscus lens is used as the imaging lens 23 in order to read a two-dimensional code label having a relatively large area. When such a reading port 22 is used, the imaging magnification of the two-dimensional code label image can be reduced as shown by a dashed line in FIGS. 3 and 4A. Therefore, 2 shown in FIG.
A two-dimensional code label 50b (see FIG. 3) having an area larger than the dimension code label 50a can be read.

Next, another reading port will be described. For example, FIG. 4B shows a reading port 25 different from the reading port 22 shown in FIG. Note that the reading port 25 also has a screw hole 25a in the fitting portion 25b,
The same applies to the point that the screw is screwed to the.

The reading port 25 is provided with a convex lens as an imaging lens 26 in order to read a two-dimensional code label whose elements constituting a code are relatively small.
When such a reading port 25 is used, the imaging magnification of the two-dimensional code label image can be increased as shown by the dashed line in FIG. 4B. As a result, the resolution of the optical information reader 10 can be increased, and a two-dimensional code label with a small interval between elements constituting a code can be read.

When the reading ports 22 and 25 having the imaging lenses 23 and 26 are designed according to the object to be read, a well-known paraxial formula of a combination lens may be used. That is, the imaging lens 1 in the case 11
4 and imaging lenses 23 and 26 provided in reading ports 22 and 25, respectively.
The optical system constituted by the above-described configuration is configured such that even if the imaging lens 14 in the case 11 is a plurality of
This results in a combination with the imaging lenses 23 and 26 provided in the reading ports 22 and 25 when the lenses are regarded as a single lens. Therefore, the imaging lenses 23 and 26 may be provided in the reading ports 22 and 25 so as to form an optical system having optical characteristics suitable for the object to be read, using the paraxial formula of a well-known combination lens. Such a combination of lenses is described in Case 1.
1 is an operation performed when designing the imaging lens 14 in FIG.

The above is a contrivance for reading various reading objects having different sizes and finenesses. Next, the illuminance distribution of the two-dimensional code label to be read or the reflected light from the two-dimensional code label will be described. The device for the above will be described. For example, the reading port 22 shown in FIG.
Compared with the reading port 25 shown in FIG. 1B or the reading port 20 shown in FIG. 1, the illuminance on the label surface of the red light emitted from the illumination red light emitting diode 12 becomes smaller as the opening becomes wider. Conceivable. In such a case,
The reading accuracy will be reduced. Further, even if the illuminance on the label surface is sufficient, it is conceivable that the two-dimensional code label partially reflects red light specularly depending on the material of the two-dimensional code label. At this time, if the light reflected by the specular reflection forms an image on the optical sensor 13, the part of the two-dimensional code label cannot be read at all.

In view of such a point, in the present embodiment, as a replaceable reading port, as shown in FIG. A reading port 27 having a red light emitting diode 29 was prepared. When the reading opening 27 is attached to the case 11, the illumination assisting red light emitting diode 29 shown in FIG.
It is connected to a lighting signal line 28a (see FIG. 2) wired to a fitting portion of the case 11 by a flat wire (not shown), and emits light by a current supplied through the lighting signal line 28a.

Thus, the illuminance distribution of the two-dimensional code label can be changed. For example, if a red light emitting diode 29 for assisting illumination is provided in the reading opening 27 so as to supplementally illuminate a dark part of the two-dimensional code label, the reading opening 27 is attached to the case 11 so that a reading error due to a shortage of light amount occurs. Can be eliminated.

Further, the optical information reading apparatus 1 of the present embodiment
At 0, the microcomputer 44 reads a predetermined two-dimensional code label with the reading port 27 having the illumination assisting red light-emitting diode 29 attached to the case 11 so that the microcomputer 44 Red light emitting diodes 12a, 12b, 12c, 12
d is turned off.

As a result, as described above, when the label surface of the two-dimensional code label is mirror-reflected, the red light from the illumination light-emitting diode 12 in the case 11 is mirror-reflected. Only the lights can be turned off. Therefore, a reading error due to specular reflection can be eliminated.

That is, considering the characteristics of the label surface,
Considering the illuminance distribution by the red light emitting diode 12 for illumination in the case 11, the red light emitting diode 29 for illumination
By preparing the reading port 27 with the position, the number, the angle, etc. of the light, it is possible to realize the appropriate amount of light and the irradiation angle for the reading, and it is possible to reliably read any two-dimensional code label. Become.

Then, the optical information reading apparatus 1 of the present embodiment
0, the reading openings 20, 22, 2 fitted externally to the case 11
The effects described above are achieved by exchanging 5, 27. In other words, the basic configuration of the case 11 can be implemented without any change from the prior art, and has an extremely excellent effect that the apparatus is not complicated or large. This is particularly effective for handy terminals.

As described above, the present invention is not limited to such embodiments at all, and can be implemented in various forms without departing from the gist of the present invention. For example, in the above embodiment, the reading ports 22, 25, and 27 having the imaging lenses 23 and 26 and the illumination-assisting red light emitting diode 29 are
Although the screws are screwed through the screw holes 22a, 25a and 27a, for example, the fitting portion of the case 11 with the reading port is made circular, and as shown in FIG. A screw may be provided in the fitting portion 31 b of the reading unit 31, and the reading port 31 may be screwed. When the reading port is made of a material such as rubber having elasticity, the reading port may be fixed by being pushed into the case 11.

Further, in the above embodiment, after the reading port 27 having the illumination assisting red light emitting diode 29 as shown in FIG. 4C is attached, a predetermined two-dimensional code label is read. The microcomputer 44 is configured to softly turn off the illumination red light emitting diode 12 provided in the case 11. For example, when the reading port 27 is attached, the illumination assisting red light emitting diode 29 is turned off on the case 11 side. When connected to the signal line 28a, the illumination red light emitting diode 12 in the case 11 may be turned off by hardware. Furthermore, it is conceivable to provide a switch on the case 11 for turning off only the illumination red light emitting diode 12 in the case 11.

Further, in the present embodiment, 2
Although the target is a dimensional code, the present invention is naturally applicable to a bar code as well.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram illustrating a configuration of an optical information reading device according to an embodiment.

FIG. 2 is a block diagram illustrating a control system of the optical information reading apparatus according to the embodiment.

FIG. 3 is an explanatory diagram illustrating a state in which a reading port of the optical information reading device according to the embodiment is replaced.

FIG. 4 is a cross-sectional view illustrating a reading port.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Optical information reading device 11 ... Case 11a ... Grip part 12 ... Red light emitting diode 13 for illumination 13 ... Optical sensor 14 ... Image forming lens 15 ... Reflecting mirror 16 ... Data processing output part 17 ... Reading part 18 ... Power supply part 19 ... Data output signal lines 20, 22, 25, 27, 31 ... reading ports 22a, 25a, 27a ... holes for screwing 22b, 25b, 31b ... fitting parts 23, 25 ... imaging lenses 28a ... signal lines 29 for illumination ... Red light emitting diode for lighting assistance 41 ... Amplifier circuit 42 ... Memory 43 ... Binarization circuit 44 ... Microcomputer 46 ... Output circuit 48 ... Buzzer device 50a, 50b ... Two-dimensional code label

Claims (3)

[Claims] 1. A light emitting unit for irradiating light to a reading object, and an optical unit for irradiating light through the reading opening by the light emitting unit and receiving light reflected by the reading object through the reading opening. An optical information reading device comprising: a sensor; and imaging means for imaging reflected light from the object to be read on the optical sensor by at least a first imaging lens. An optical information reading apparatus characterized in that a reading port having a second imaging lens constituting an imaging means can be selectively attached by a user. 2. A light emitting means for irradiating light to the object to be read, and an optical element for irradiating light through the reading opening by the light emitting means and receiving light reflected by the object to be read through the reading opening. An optical information reading apparatus comprising: a sensor; and imaging means for forming an image of reflected light from the object to be read on the optical sensor, wherein a second light emission used together with or instead of the light emitting means An optical information reading apparatus characterized in that a reading port having a means can be selectively attached by a user. 3. A light emitting means for irradiating light to the object to be read, and an optical element for irradiating light through the reading opening by the light emitting means and receiving light reflected by the object to be read through the reading opening. An optical information reading device comprising: a sensor; and imaging means for imaging reflected light from the object to be read on the optical sensor by at least a first imaging lens. The user selectively attaches a reading port having a second image forming lens constituting an image forming unit and having a second light emitting unit used together with or instead of the light emitting unit. An optical information reading device characterized in that the optical information reading device is configured to be capable of performing the following.