WO2006051579A1 - 光走査方法及び装置、バーコード読取方法及び装置、並びにこれらに用いられるポリゴンミラー - Google Patents
光走査方法及び装置、バーコード読取方法及び装置、並びにこれらに用いられるポリゴンミラー Download PDFInfo
- Publication number
- WO2006051579A1 WO2006051579A1 PCT/JP2004/016572 JP2004016572W WO2006051579A1 WO 2006051579 A1 WO2006051579 A1 WO 2006051579A1 JP 2004016572 W JP2004016572 W JP 2004016572W WO 2006051579 A1 WO2006051579 A1 WO 2006051579A1
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- WO
- WIPO (PCT)
- Prior art keywords
- optical scanning
- rotating body
- scanning device
- light
- angle
- Prior art date
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10554—Moving beam scanning
- G06K7/10594—Beam path
- G06K7/10603—Basic scanning using moving elements
- G06K7/10613—Basic scanning using moving elements by rotation, e.g. polygon
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors
Definitions
- the present invention relates to an optical scanning device and optical scanning method for scanning a light to form a scanning pattern in a predetermined area, a barcode reading device and a barcode reading method for scanning a barcode and reading a barcode, and The present invention relates to a polygon mirror used for these.
- an optical scanning device using a rotational drive system is known.
- the polygon mirror in this optical scanning device is fixed to a rotating body with a plurality of reflecting mirrors that form polygon mirrors at different support angles so that light having a light source power can be emitted as a plurality of scanning beams. .
- the irradiation direction of each of the plurality of scanning beams is always constant, and the interval between them is constant, and the scanning pattern formed thereby is always constant for a certain region. Become.
- a barcode reader is configured using such a conventional optical scanning device and a barcode is to be read by the barcode reader, as shown in FIG. If the interval (scan interval) between the multiple scanning beams (LI ', L2' and L3 ') in the scanning pattern is too wide for (barcode area), the barcode width will not fit in the interval between the scanning beams. In some cases, the barcode 901 having a small width cannot be scanned and the barcode cannot be read. On the other hand, when the scanning interval is too narrow, the scanning range becomes narrow and the operability becomes poor.
- Patent Document 1 The following patent document is known as a technique related to the present invention (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Laid-Open No. 7-261105
- the present invention has been made to solve the above-described problems, and has a simple configuration and is capable of running.
- Optical scanning method and apparatus, bar code reading method and apparatus which can perform stable scanning regardless of the shape of the object, improve operability and improve bar code reading reliability, and Means for solving the problems aimed at providing a polygon mirror to be used
- the present invention provides an optical scanning device that scans light to form a scanning pattern in a predetermined region, and includes a rotating body that is rotated by a rotation driving unit, and the rotating body A plurality of reflecting mirrors provided along a rotational circumferential direction of the rotating body, wherein at least one of the reflecting mirrors is provided such that a reflecting surface thereof is swingable with respect to a rotating shaft of the rotating body.
- the reflection mirror that guides the reflected light of the light source to a predetermined region by changing the reflection light path of the light of the light source force by changing the angle of the reflection surface with respect to the rotation axis by the centrifugal force generated by the rotation of the light source Is provided.
- one end in the rotating shaft direction is inertially supported by the rotating body. be able to.
- control member which controls the rocking
- each of the plurality of reflecting mirrors is supported at a different support angle with respect to the rotating shaft, and the range of the swing angle of at least one of the plurality of reflecting mirrors is at least the at least one of the reflecting mirrors. It may be less than an angle difference between the support angle of one reflector and the support angle of other reflectors other than the at least one reflector.
- At least one of the plurality of reflecting mirrors may be fixedly supported so as not to swing with respect to the rotation shaft.
- the reflecting mirror provided so as to be able to swing with respect to the rotating shaft can swing when the rotational speed of the rotating body exceeds a predetermined rotational speed.
- the reflecting mirror provided so as to be able to swing with respect to the rotating shaft is configured to be supported at the tip of a panel portion extending from the rotating body toward the outer side in the rotating radius direction. it can.
- the rotation driving unit and the rotation driving unit are controlled, and the rotating body rotates so that a swing angle of the reflecting mirror with respect to the rotation axis is a desired angle.
- a drive control unit that controls the speed may be provided.
- the drive control unit has a first mode in which the rotation speed of the rotating body is maintained at a first speed, and a second mode in which the rotation speed of the rotating body is maintained at a second speed. Can do.
- the drive control unit may have a third mode in which the rotation speed of the rotating body is changed between a third speed and a fourth speed.
- the optical scanning device further includes an angle detection unit that detects a swing angle of the reflecting mirror with respect to the rotation axis, and the drive control unit is detected by the angle detection unit. Based on the swing angle of the reflecting mirror, the rotational drive speed of the rotating body is controlled.
- an operation unit for setting the first mode and the second mode to be switchable is provided.
- the optical scanning device of the present invention further includes an optical system for guiding the light reflected by the reflecting mirror to the outside through at least an opening of a casing surrounding the rotating body and the reflecting mirror, and
- the swing range of the mirror with respect to the rotation axis may be set so that the reflected light from the reflecting mirror can pass through the range of the opening.
- the reflecting mirror and the rotating body may be integrally molded.
- the present invention also provides a barcode reader that scans light to form a scanning pattern in a predetermined area and receives reflected light from the predetermined area on which the scanning pattern is formed to read a barcode.
- a drive control unit that controls the rotation drive unit to control a rotation speed of the rotating body, and a plurality of reflecting mirrors provided along a rotation circumferential direction of the rotating body, wherein at least one of the plurality of reflecting mirrors
- the reflection surface is provided so as to be swingable with respect to the rotation axis of the rotating body, and the angle of the reflection surface with respect to the rotation axis is changed by the centrifugal force generated with the rotation of the rotation body.
- the reflected light path of the light source power is changed to change the reflected light of the light source.
- the reflecting mirror that leads to a predetermined area and forms a scanning pattern in the predetermined area; a light receiving section that receives reflected light of the predetermined area force on which the scanning pattern is formed; And a barcode recognition unit for recognizing a barcode based on the outputted light reception signal.
- the drive control unit can stop the rotation drive of the rotating body by the rotation drive unit based on the barcode recognition result in the barcode recognition unit.
- the present invention is an optical scanning method in which light having a light source power is scanned to form a scanning pattern in a predetermined area, and a rotating mirror is provided with a reflecting mirror that can be swung by centrifugal force.
- the scanning pattern is changed by changing the reflection angle of light by swinging the reflecting mirror by the centrifugal force of the rotating body.
- the present invention is a bar code reading method that scans light with light source power to form a scan pattern in a predetermined area and receives reflected light from the scan pattern to read a bar code.
- the rotating pattern is changed by changing the reflection angle of light by swinging the reflecting mirror by the centrifugal force of the rotating body and changing the reflection angle of the light. It is a thing.
- the present invention also provides a polygon mirror used in an optical scanning device that scans light to form a scanning pattern in a predetermined area, and includes a rotating body that is rotated by a rotation driving unit, A plurality of reflecting mirrors provided along a circumferential direction of rotation, wherein at least one of the plurality of reflecting mirrors is provided such that a reflecting surface thereof is swingable with respect to a rotating shaft of the rotating body. And a reflecting mirror that changes a reflected light path of light of a light source force by changing an angle of the reflecting surface with respect to the rotation axis by a centrifugal force generated by rotation.
- FIG. 1 is a functional block diagram showing a configuration of a bar code reader 6 provided with an optical scanning device according to the present embodiment.
- FIG. 2 is a plan view for explaining the configuration of a polygon mirror P.
- FIG. 3 is a view of polygon mirror P shown in FIG. 2 as viewed in the direction of arrow A and in the direction of arrow B.
- FIG. 4 is a view showing an example in which the reflecting mirror is supported near the front end of the panel portion by an adhesive or the like with respect to the panel member.
- FIG. 5 is a view for showing an example in which a panel member and a reflecting mirror are physically formed.
- FIG. 6 is a diagram showing only one beam traced when there are a plurality of reflecting mirrors constituting the polygon mirror P.
- FIG. 7 is a diagram for explaining the scanning pattern of the outgoing beam by the optical scanning device.
- FIG. 8 is a cross-sectional view for explaining generation of a scanning pattern in the barcode reader 6 according to the present embodiment.
- FIG. 9 is a diagram showing a scanning pattern in the barcode reader 6 according to the present embodiment as viewed in the Q direction force in FIG.
- FIG. 10 is a diagram showing a pattern of light emitted in a state where a scanning pattern is fixed.
- FIG. 11 is a diagram showing a pattern of light irradiated when the scanning pattern is variable in the optical scanning device according to the present embodiment.
- FIG. 12 is a flowchart for explaining the flow of processing in the optical scanning method and barcode reading method according to the present embodiment.
- FIG. 13 is a diagram for explaining a bar code reader provided with a conventional optical scanning device.
- FIG. 1 is a functional block diagram showing a barcode reader according to the present embodiment.
- the barcode reader 6 includes an optical scanning device 600 according to the present invention, a barcode demodulator (barcode recognition unit) 605 that reads a barcode scanned by the optical scanning device 600, And a communication unit 607 for transmitting a barcode reading result.
- the optical scanning device 600 is provided in a housing 611 having an opening 61 la, and a transparent plate 610 that transmits light from the optical scanning device 600 is provided in the opening 611 a of the housing.
- the optical scanning device 600 includes an LD (visible light semiconductor laser) that constitutes a light source, a mirror 601 and a concave mirror 602 that constitute an optical system, a switch 603 that constitutes an operation input unit, and a scanner control.
- a scanner control unit 604 that performs control, a pin photodiode 609 that constitutes a reflected light reading unit that receives reflected light, a polygon mirror P that forms a scanning beam, a motor M (rotation drive unit) that rotationally drives the polygon mirror P, and a motor
- a motor controller 606 that controls M and cooperates with the scanner control unit 604 to form a drive control unit is provided.
- the laser beam emitted from the LD 608 is shaped into a desired beam shape by a predetermined lens, reflected by the plane mirror 602a formed at the center of the concave mirror 602, Incident on the mirror surface of polygon mirror P.
- the polygon mirror P has a plurality of mirrors arranged in the circumferential direction of the rotation, and reflects the incident beam in the direction of the mirror 601 as a scanning beam.
- the mirror 601 emits the reflected light from the polygon mirror P as a scanning beam through the transparent plate 610 from the device opening 61 la to the outside of the device.
- the scanning beam L emitted to the outside scans an area including the barcode 901. A part of this scanning beam is reflected in an area including the barcode 901, and the reflected light returns to the inside of the apparatus along the broken line path shown in the figure, and mirror 601, polygon mirror P, concave mirror 1 After passing through 602, the light enters the pin photodiode 609 which is a light receiving portion.
- the pin photodiode 609 receives the reflected light from the barcode area, and the barcode decoding unit 605 recognizes the barcode signal based on the light reception signal from the pin photodiode 609.
- the recognized barcode signal is transmitted to HOST 7 via the scanner control unit 604 and the communication unit 607.
- the structure of the polygon mirror in the embodiment of the present invention will be described in detail.
- a plurality of reflecting mirrors constituting the polygon mirror swing in the direction of the rotation axis with respect to the rotation axis, and the reflection of these reflections.
- the angle of the surface with respect to the rotation axis changes.
- FIG. 2 is a plan view for explaining the structure of the polygon mirror P
- Fig. 3 is a view of the polygon mirror p shown in Fig. 2 in the directions of arrows A and B
- Fig. 4 is a diagram of the polygon mirror P.
- FIG. 5 is a diagram showing an example of a method of attaching the reflecting mirror
- FIG. 5 is a diagram showing another example of the method of attaching the reflecting mirror in the polygon mirror.
- the polygon mirror P is a rotation driven by a motor M.
- the base side end 2a is attached to the rolling element 4 and the upper end rotation axis of the rotating body 4 by the fixing part 3, and the reflector is attached to the arm-like front end side end 2b extending radially from the base side end 2a.
- the panel member 2 is provided with a mounting portion 201-204 for use, and reflecting mirrors 101-104 attached to the mounting portions 201-204.
- Each of the mounting portions 201-204 is formed with a substantially rectangular reflecting mirror mounting surface 201a-204a, and each of the mounting surfaces 201a-204a is rotated around the rotating body 4 so as to be orthogonal to each other. For example, four are arranged along the direction. Then, the vicinity of both ends of the upper edge of each mounting surface 201a-204a is connected to the base side end 2a in an arm shape.
- the angles formed by the mounting surfaces 201a-2 04a and the rotation axis of the rotating body 4 are slightly different from each other so that the supporting angles of the reflecting mirrors 101-104 attached thereto are different from each other, and an interval is formed between the scanning beams. It is.
- the shape of the reflecting mirror 101-104 attached to each mounting surface 201a-204a is a substantially rectangular shape that is substantially the same as the shape of the mounting surface 201a-204a, and the back surface thereof is attached by, for example, an adhesive. Adhesively bonded to the surfaces 201a-204a.
- the reflecting mirrors 101-104 attached to the attaching portions 201-204 have their reflecting surfaces having a predetermined angular difference with respect to the rotation axis.
- the rotating body 4 is directed to the outside in the radial direction of rotation, and the upper end side thereof is elastically supported.
- the reflecting surface swings upward in accordance with the centrifugal force generated by the rotation of the rotating body.
- the irradiation direction of the scanning beam is changed upward, and the angle with respect to the rotation axis of the reflecting mirror varies with the rotation of the rotating body.
- a flat projection (see, for example, 203s and 204s in FIG. 4) is provided at the center of the lower edge of the mounting surface 201a-204a of each mounting portion 201-204, and at the bottom of the rotating body 4
- the regulation member 40 having long grooves (see 402 and 404 in FIG. 3) in which these protrusions are loosely fitted is provided substantially horizontally, and the reflecting grooves 101-104 are swung (swinging) by the width of the long grooves. The angle is regulated within a predetermined range.
- the regulation member 40 regulates the polygon mirror P by preventing the projection of the mounting portion 201-204 from contacting the outer edge of the long groove in the radial direction and further swinging. This is done to protect against damage.
- the motor M rotates the rotating body 4 and the rotational speed of the rotating body 4 exceeds a certain rotational speed, the centrifugal force generated thereby becomes a predetermined value or more, and the reflecting mirror 101 — Reflecting mirror 101-104 swings on the elastic force of panel member 2 carrying 104, and the reflection direction (scanning beam irradiation direction) changes accordingly.
- the swing angle of the reflecting mirrors 101-104 supported by the spring member 2 is substantially proportional to the change in the rotational speed of the motor M.
- the rigidity of the mounting portion of the panel member 2 can be varied by the plurality of reflecting mirrors 101-104, and the plurality of scanning beam intervals can be varied.
- the swing angle of at least one of the plurality of reflecting mirrors 101-104 is set to the support angle of the reflecting mirror (for example, reflecting mirror 101) and the other reflecting mirror (for example, reflecting mirror 102). — By setting the angle so that it is less than the angle difference from the support angle in (104), it is possible to prevent multiple scanning beams from overlapping each other or other scanning beams from entering one scanning beam interval. Therefore, effective deformation of the scanning pattern can be performed.
- FIG. 3 shows that the range of the swing angle of the reflecting mirror 102 with respect to the rotation axis of the motor M is ⁇ 2, and the range of the swing angle of the reflecting mirror 104 with respect to the rotation axis of the motor M is ⁇ 4.
- the panel member 2 With respect to the configuration of the panel member 2, it is easier to stagnate by forming a stagnation part in an extended part (arm-like part) from the base side end part 2 a to the tip side end part 2 b of the panel member 2 ( It is also possible to obtain a configuration that is easy to swing. Furthermore, in this case, it is also desirable to reduce the panel thickness of the panel member 2 or to have a hollow structure in the middle of the stagnation portion. In addition, it is desirable that the panel width be wide to minimize the sag due to air resistance during motor rotation.
- FIG. 4 shows a force in which the reflectors 102 to 104 are attached to the mounting portion of the panel member 2 with an adhesive or the like, as shown in FIG. Needless to say, the panel member 2 and the reflecting mirrors 102 to 104 may be integrally formed.
- FIG. 6 shows a trace of only one beam emitted when there are a plurality of reflecting mirrors constituting the polygon mirror P.
- the number of outgoing beams for the number of reflectors scans in the same direction at regular intervals.
- the inclination of the outgoing beam depends on the rotational driving speed of the motor M.
- the speed change of the rotational drive speed of the motor M is fast, the inclination of the outgoing beam changes abruptly.
- the speed change of the rotational drive speed is slow, the slope of the outgoing beam also changes gently.
- the scanning pattern is not deformed by the emitted beam, and the scanning pattern has a constant shape.
- the solid line indicates the locus when the rotational drive speed is increased
- the dotted line indicates the locus when the rotational drive speed is decreased.
- FIG. 7 is a diagram for explaining the scanning pattern of the emitted beam by the optical scanning device having the above-described configuration.
- the oscillation width W of the scanning patterns L1 to L3 of each of the outgoing beams is set to be narrower than the scanning interval of the outgoing beams.
- FIG. 8 is a cross-sectional side view for explaining generation of a scanning pattern in the barcode reader 6 according to the present embodiment
- FIG. 9 shows a scanning pattern in the barcode reader 6 according to the present embodiment. It is the figure which also looked at Q direction force in.
- the light emitted from the LD608 becomes a plurality of outgoing beams reflected at different angles by the plurality of reflecting mirrors 102 to 104 in the polygon mirror P, and is scanned by each outgoing beam.
- Patterns L1 and L4 are generated.
- the scanning pattern in the barcode reader 6 according to the present embodiment has a wider irradiation area of the scanning pattern corresponding to each reflecting mirror than the conventional scanning pattern. .
- FIG. 10 shows the pattern of light emitted with the scanning pattern fixed
- FIG. 11 shows the pattern of light emitted when the scanning pattern is variable in the optical scanning device according to this embodiment.
- FIG. 11 shows that the irradiation area force of one scanning pattern L1 ′ shown in FIG. 10 is expanded to an irradiation area having a predetermined width w as in the scanning pattern L1 according to the present embodiment.
- the scanner control unit 604 can perform scan mode change settings based on the operation of the switch 603.
- the motor M is kept rotating at the lower limit value, and the first mirror in which each mirror of the polygon mirror is kept at the first predetermined angle.
- the motor M is kept rotating at the upper limit value, and the polygon mirror
- the rotational speed of the motor M is alternately changed between the upper limit value and the lower limit value, so that each mirror in the polygon mirror is changed to the first mirror.
- the third predetermined angle is the same as the first predetermined angle
- the fourth predetermined angle is the same as the second predetermined angle, but these are different. It's okay! Needless to say!
- the first mode and the second mode are alternately set every time one operation switch is pressed, and the third mode is set while the long press is pressed. It can be realized by doing so. It is also possible to provide a mode switch corresponding to each mode.
- the barcode demodulating unit 605 determines that the barcode has been accurately read, the barcode demodulating unit 605 gives a scanning operation end instruction to the scanner control unit 604. Upon receiving this scanning operation end instruction, the scanner control unit 604 issues a motor stop instruction to the motor controller 606.
- the lower limit rotational speed (lower limit rotational speed) is the rotational speed of the first mode.
- the speed limit (upper limit speed) is the speed of the second mode.
- the power of the motor M is turned on, the rotation of the motor M is started (S101), and the rotation speed of the motor M is detected by the motor controller 606 (S102). If it is not determined that the motor M is rotating (S 103, No), the process returns to the motor M rotation speed detection (S 102).
- the motor controller 606 controls the drive so as to increase the rotational speed (S107). In this manner, this loop is repeatedly performed until the lower limit number of revolutions is reached while checking the number of revolutions (S106, Yes).
- the motor controller 606 determines whether or not there is an operation end instruction from the scanner control unit 604 (S108), and if there is an operation end instruction (S108, Yes), stops driving the motor M. (S118) Force When there is no force to end the operation (S108, No), the scanner control unit 604 determines whether the lower limit speed of the motor M is maintained (first mode) ( S109). If it is determined that the first mode is set (S109, Y), steps S105 to S109 are repeated so as to maintain the state.
- the motor controller 606 detects the rotational speed of the motor M (S110) and reaches the upper rotational speed limit. (Sl ll). If it is determined that the upper limit speed has not been reached (Sill, No), the drive control is performed by the motor controller 606 to increase the speed until the upper limit speed is reached so as to shift to the second mode ( Steps S110—S112).
- Step S 110 Step SI 14 is repeated to hold.
- the motor controller 606 issues a command to reduce the rotational speed of the motor M (S115), The number of revolutions of the motor M is reduced so as to shift to the first mode, and the processes from (S115) to (S117) are repeated until the number of revolutions of the motor M reaches the lower limit number of revolutions.
- the process returns to step S108, and then the scanner control section 604 until an operation end instruction is received.
- the operation is performed in one of the modes (first mode, second mode, and third mode) set in control unit 604.
- the four reflecting mirrors constituting the polygon mirror are all configured to swing with the rotational speed of the rotating body, but there are few of the plurality of reflecting mirrors.
- the motor M may be fixedly supported so that the angle with respect to the rotation axis of the motor M does not change as the rotating body 4 is driven to rotate.
- the reflector that is fixedly supported is formed at a support angle formed by the reflecting surface and the rotating shaft at the time of stationary, and in a direction opposite to the swinging direction.
- the support angle be the smallest, it is possible to further widen the scanning pattern formed by the fixed reflecting mirror that does not swing and the reflecting mirror that swings. It becomes.
- the swing angle of the reflecting mirror is controlled only based on the rotational speed of the rotating body.
- An angle detection unit 612 that detects the swing angle of the rotating body 4 may be provided, and the rotation speed of the rotating body 4 may be controlled based on the detection signal of the angle detection unit 612.
- Such an angle detection unit 612 can be configured using a reflection type optical sensor that detects the reflection mirror surface angle and the support angle of the mounting portion. Needless to say, the angle detector 612 may detect the reflected light of the light source from the reflecting mirror to detect the swing angle.
- the configuration in which the restricting member is integrated with the rotating body is shown.
- the present invention is not limited to this.
- the optical scanning method according to the present embodiment is an optical scanning method in which light from a light source is scanned to form a scanning pattern in a predetermined region, and the rotating body is shaken by centrifugal force.
- a movable reflecting mirror is provided, and the scanning pattern is formed by changing the reflection angle of light by swinging the reflecting mirror by the centrifugal force of the rotating body.
- the scanning beam interval can be changed with a simple configuration, so that stable scanning can be performed regardless of the shape of the scanning target. It is possible to provide a scanning device, a barcode reader, an optical scanning method, and a barcode reading method.
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Abstract
Description
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PCT/JP2004/016572 WO2006051579A1 (ja) | 2004-11-09 | 2004-11-09 | 光走査方法及び装置、バーコード読取方法及び装置、並びにこれらに用いられるポリゴンミラー |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104156688B (zh) * | 2014-09-05 | 2017-05-24 | 广州尚臣电子有限公司 | 一种条形码激光扫描器 |
CN109737969A (zh) * | 2019-03-21 | 2019-05-10 | 孔祥明 | 一种物联网定位信息系统及方法 |
Citations (4)
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JPH05150179A (ja) * | 1991-11-29 | 1993-06-18 | Fujitsu Ltd | Posスキヤナのポリゴンミラー |
JPH068920U (ja) * | 1992-07-07 | 1994-02-04 | 株式会社コパル | 光ラスタスキャニング装置 |
JP2002250887A (ja) * | 2001-02-22 | 2002-09-06 | Ricoh Co Ltd | 回転型光走査光学系のフェールセーフ機構 |
JP2002531870A (ja) * | 1998-11-30 | 2002-09-24 | ユニベルジテット ハノーバー | オブジェクトを走査する装置 |
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2004
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH05150179A (ja) * | 1991-11-29 | 1993-06-18 | Fujitsu Ltd | Posスキヤナのポリゴンミラー |
JPH068920U (ja) * | 1992-07-07 | 1994-02-04 | 株式会社コパル | 光ラスタスキャニング装置 |
JP2002531870A (ja) * | 1998-11-30 | 2002-09-24 | ユニベルジテット ハノーバー | オブジェクトを走査する装置 |
JP2002250887A (ja) * | 2001-02-22 | 2002-09-06 | Ricoh Co Ltd | 回転型光走査光学系のフェールセーフ機構 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104156688B (zh) * | 2014-09-05 | 2017-05-24 | 广州尚臣电子有限公司 | 一种条形码激光扫描器 |
CN109737969A (zh) * | 2019-03-21 | 2019-05-10 | 孔祥明 | 一种物联网定位信息系统及方法 |
CN109737969B (zh) * | 2019-03-21 | 2023-07-21 | 孔祥明 | 一种物联网定位信息系统及方法 |
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