CN103026366B - There is the data reader of compact Layout - Google Patents

Abstract

The present invention relates to one and include one or more imager or imager molectron (50,126/128,177/178,350) data reader (10,100,150,300), it obtains the two dimensional image of the object being placed in view volume (5), this data reader has refrative mirror (60/62,122/124,172/174/176,362/360) and allow other assemblies of compact and active element configuration to arrange.

Description

There is the data reader of compact Layout

Technical field

The field of the disclosure relates generally to imaging, concrete but not exclusively relate to the reading of light code (such as slice code).

Background technology

The light code project to being attached about it or be otherwise associated information useful, optical readable is compiled Code.Perhaps, the best illustration of light code is bar code.Bar code is ubiquitous on all kinds object, or closes with all kinds object Connection, such as retail packaging (such as, UPC code), wholesale and stock；Retail product shows fixture (such as, shelf)；? Article in manufacture；Individual or company's assets；Document；And document files.By coding information, bar code is typically used as object Identifier, wherein this identification is a type objects (such as, milk container) or the project of uniqueness.

Bar code includes bar alternately (that is, relatively dark region) and blank (that is, relatively bright region).Bar alternately and blank Pattern and these bars alternately and blank width means binary one and the character string of 0, the specific bar of any of which or blank Width is the integral multiple of regulation minimum widith, and it is referred to as " module " or " unit ".Therefore, in order to encode information, bar code reads Device allows for reliably distinguishing the pattern of bar or blank, and be such as determined by crossing over whole bar code length adjoins bar and blank Between margin definition line position.

Bar code is an example in currently used many light code types.The most frequently used bar code is one-dimensional or linear Light code, such as UPC code or code 39 bar code, wherein information is encoded in a direction-is perpendicular to bar and blank direction.Sometimes Wait the light code of the also referred to as higher dimension of " bar code ", such as two-dimensional matrix code (such as, MaxiCode) or storehouse code is (such as, PDF417) it is also used for various purpose.

Reader based on imager uses photographing unit or imager to generate the electrical image data of light code (generally with numeral Display).Then, view data is processed, in order to find and decode light code.Such as, virtual scan line technology is following known skill Art, it is generally spaced by search and at the image along a plurality of line of all angles, thus digital processing comprises the figure of light code Picture, is similar to the scan pattern of laser beam in scanner based on laser to a certain degree.

Data reader based on imager is usually only capable of a perspective view from the normal vector outside imager face Form image.Reader based on imager can utilize ambient light or they can include light source (such as LED) obtain image. When label be oriented such that the light of light source be directly mirrored return to imager time, wash desired figure completely off due to non-uniform reflection Picture, imager possibly cannot correctly read, or owing to one or more key element is washed in the reflection of texture minute surface off, imager may nothing Method correctly reads.This effect may cause reading glossy label in specific reflection angle can be problematic, and imaging relatively Device is positioned at the label of extreme acute angle and is probably and cannot read.And, the illumination light outwards penetrated is the most undesirably from window Rear side and front side reflect and return on imager.In the case of scanning constant instrument, need the observation chi of scanner nose Very little is big, generally at 50nm to 100nm, it means that needing from imager is long to the distance of scanner nose, for Some scanner, in the grade of 70nm to 120nm.The physics of these and other and functional restraint so that realize data reader The compact Layout of assembly (namely window, printed circuit board (PCB) (PCB), internal mirror and imager) becomes difficulty.

Therefore, present inventor have determined that, it is provided that improve existing reader based on imager restriction based on imaging The reader of device will be meet desired.

Summary of the invention

Accompanying drawing explanation

Fig. 1 illustrates the schematic side elevational according to a preferred disposition and the displaying categorical data reader illustrating intraware Figure.

Fig. 2 illustrates the schematic front plan figure of Fig. 1 data reader.

Fig. 3 illustrates that Fig. 2 data reader that 3-3 along the line draws removes shell and the schematic front with standby condenser lens Plane graph.

Fig. 4 illustrates the bottom rear normal axomometric drawing of Fig. 1-3 data reader.

Fig. 5 illustrates the front left normal axomometric drawing of Fig. 3 data reader.

Fig. 6 illustrates the schematic side elevation of the data reader of the type of imager according to the first selective configuration.

Fig. 7 illustrates the schematic side elevation of the data reader of the type of imager according to the second selective configuration.

Fig. 8 illustrates the schematic side elevation of the data reader of the type of imager according to the 3rd selective configuration.

Fig. 9 illustrates that in data reader, conventional mirror installs the explanatory view of configuration.

Figure 10 illustrates the explanatory view of the preferred embodiment installing configuration in data reader for mirror.

Figure 11 illustrates the explanatory view of the alternate embodiment installing configuration in data reader for mirror.

Figure 12 illustrates that the schematic front with the display scan instrument in single PCB layout and PCB with central opening is put down Face view.

Figure 13 illustrates the schematic side elevation of the display scan instrument with tilted window and deep groove.

Figure 14 illustrates the schematic side elevation of the data reader according to another alternate embodiment.

Figure 15 illustrates the front elevation of Figure 14 data reader.

The viewgraph of cross-section of Figure 15 data reader that Figure 16 16-16 along the line draws.

Figure 17 illustrates the exploded view of the intraware of Fig. 4-16 data reader.

Figure 18 illustrates the exploded view of Figure 17 intraware that part assembles.

Figure 19 illustrates the normal axomometric drawing of all Figure 17 intrawares of assembling.

Detailed description of the invention

With reference to aforementioned drawing, this section describes specific embodiment and detailed structure thereof and operation.Embodiment described herein Mode only by example illustrates, is not to provide constraints.In view of the teachings contained herein, it should be appreciated that there is also certain model The equivalent integers of the examples described herein embodiment enclosed.The most it is apparent that other embodiments are possible, can be to this paper institute State embodiment and make change, and the equivalent forming the assembly of described embodiment, part or step can be there is.

For simplicity and clarity, the assembly of some embodiment or some aspect of step are not shown unnecessary thin Joint, in view of the teachings contained herein, such details is apparent from for those skilled in the art, and/or such Details can obscure the understanding of more parties concerned of embodiment.

Fig. 1-5 illustrates the data reader 10 according to the first preferred embodiment.The specifically shown reading with shell 20 of Fig. 1 Device 10, shell 20 has pivotal attachment in the upper member 22 of base member 23.Upper case parts 22 and base member 23 it Between connection preferably include privot mechanism 24 as described herein below, its allow upper case parts 22 incline relative to base member 23 Tiltedly.Reader 10 is included in its just/front window 64 above.As it is shown in figure 1, reader 10 is arranged on obliquity so that window Mouthfuls 64 are oriented by general vertical and face generally towards side, so for reading the bar code on the vertical side of project/article.Reader 10 can be downward-sloping so that window 64 be oriented at be suitable to read bar code at project top obliquely towards direction, Maybe can be inclined upwardly so that window 64 be oriented at be suitable to read bar code in project bottom obliquely towards direction.

The reader 10 illustrated has the curve-like upper case 22 of the hands crawl adapting to user.Optional starter or cause Dynamic button 25 can be arranged on shell 22 suitable/facilitate on position；Alternatively, starter or actuation button 25 can be by It is arranged on base member 23.Alternatively, shell 22 can be other profiles configuration of such as box-shaped.Intraware and shell Compactedness unit can be made to lift with hand-held mode and operate.

Reader 10 can be linked to main frame via cable 30, or it can via such as RF(such as, bluetooth, Zigbee), IR(is infrared) or microwave wireless connections be linked.Alternatively, cable 30 may be connected to base member 23, It is particularly suitable for base member 23 and remains attached to the embodiment of upper case 22 with hand-held mode.

Reader 10 includes the one or more circuit boards (PCB) of the PCB40 being such as arranged in upper case parts 22. Main PCB40 has a planar profile, and be preferably oriented in that about acutangulate with front window 64, install on rear side of case member 22 Or be arranged on rear side of case member 22.Acute angle is preferably between 30 ° and 60 ° or the grade of 45 °.It is installed on PCB40 Electronic device includes that RJ-45 adapter 34, microprocessor 42 and arbitrarily memorizer, imager molectron 50(are by camera lens 52, two dimension Sensor array 53 and aperture 54 form), illuminator 70(is made up of LED72 and reflection cone 74).Also it is arranged on housing department In part 22 is the first mirror 62 and the second mirror 60, and the first mirror 62 is installed on PCB40 via bracket 63, and the second mirror 60 warp It is installed on case member 22 by bracket 61.In view volume 5, the two dimensional image of object 90 is from a perspective view/visual angle (perspective) obtain and propagate, and being reflected down by primary mirror 62 along the first image path section 80, along second by window 64 Image path section 82 arrives the second mirror 60, and image upwards and/or is reflected along the 3rd image path section by this second border 60 to side 84 arrive the imager molectron 50 can supported by PCB40.Image can be suitable by be positioned at before imaging array 53 Amasthenic lens 52 and aperture 54 focus on, and imaging array 53 obtains the two dimensional image of object 90.Primary mirror 62 is oriented opposite windows 64 acutangulate.Acute angle is preferably between 30 ° and 60 ° or the grade of 45 °.

In order to describe purpose, using UNC herein, wherein primary mirror is the first reflecting surface of subject image, and secondary mirror is Second reflecting surface, and the 3rd mirror is the 3rd reflecting surface, etc. so that the image of object from primary mirror to secondary mirror, Then arrive at the 3rd mirror.Therefore in reader 10, the first mirror 62 can be referred to as primary mirror, and the second mirror 60 can be referred to as Secondary mirror, wherein the image of the object 90 in view volume 5 passes window 64, and is reflexed to secondary mirror 60 by primary mirror 62, then arrives Reaching imager molectron 50, it then obtains/two dimensional image of captures object 90 converting the image to for processing/encoding Electronic signal format.

The primary mirror 62 being arranged on PCB40 via mounting bracket 63 is arranged to the acute angle relatively small relative to PCB40 one-tenth, example As the grade of 10-15 ° or less.Fig. 1 illustrates that mirror 62 is oriented at and becomes about 60 ° and relatively relative to front window 64 PCB40 becomes the example of the angle of about 12 °；Fig. 3 illustrates that 62 are oriented at and become about 45 ° and relatively relative to front window 64 PCB40 becomes the angle of about 0 ° or is parallel to the example of PCB40.Alternatively, mirror 62 can be by suitable attachment mechanism, example As being mounted directly/be attached in the surface of PCB40 via screw, two-sided tape or binding agent.

Privot mechanism 24 includes the circular common unit 26 being nested in the respective cylindrical hole parts 28 of base member 23. Public cylindrical member 26 is fixed on cylindrical cavity parts 28 via the combination of suitable attachment mechanism, such as latch and sleeve In.Other suitable bindiny mechanisms can be used.Such as, cylindrical parts can be fixed to hole parts by magnetic coupling mechanism, Magnetic force keeps the connection between part, allows also to pivoting or even separating.In another is arranged, lower member 26 can be wrapped Including the spherical member being nested in hole parts 28, ball snaps in hole, and is held in place by by frictional fit, Allow also to even separate in pivot.

The illuminator 70 illustrated is installed in the upper area of shell, its with three groups often organize three LED72a, 72b, 72c(LED72a-c is installed on PCB40), each LED group is arranged in corresponding reflective array 74a, 74b, 74c, its The operable visual field guiding LED illumination along desired export-oriented path.Reflective array or reflection cone 74a(are observed by Fig. 2 and are reading The right side of device 10) be formed as the taper with four reflective inner surface, its operable reflection and guiding are from being arranged on the cone end The light of three LED72a in portion.Similarly, reflective array or reflection cone 74a(are observed in the left side of reader 10 by Fig. 2) formed For the taper with four reflective inner surface, its operable reflection and guiding from three LED72b's being arranged on bottom cone Light.The 3rd reflective array 74c being provided with three LED72c is arranged between reflective array 70a and 70b.3rd reflection Array 74c can have the taper with four reflecting surfaces, but is illustrated that the situation relatively descending reflecting surface to be removed. LED72 may be oriented to from being perpendicular to window 64 with little downward angle (about 10 ° to 15 °) direct light, thus light is less Directly concentrating one's gaze on user, result is to display to the user that the brightest light.

Reader 10 also includes speaker 36.In this configuration.Speaker 36 is arranged close to the front table of shell 22 Face, and it is connected to PCB40 via wired connection.

The mounted rear wall close to case member 22 of PCB40, and it is oriented in the acute angle of 30 ° of grades of relative front window 64, make The imager 50 must being arranged on PCB40 not region be directly facing window 64.Therefore, that reflect from window 64, from photograph system The outside light of system 70 is unlikely with angle/direction reflection, in order to move ahead along the direct incident path to imager.Further Ground, is set, by having, the primary mirror 62 that opposite windows 64 is acute angle (such as, the grade at 45 °), reflects from window 64 , from the unlikely angle/side to move ahead along the direct incident path 82,84 to imager of the outside light of photographic system 70 To reflection.

The orientation of primary mirror 62 opposite windows 64 is capable of some advantage with the combination of the orientation of PCB40 opposite windows 64, One or more in the most following:

--the compact arrangement of reader assembly and there is big window read area in shell 22；

--make both imager 50 and illumination LED 72 can be installed on public PCB40；

--(via mirror 62,60) through window directly reflect travel path of incident light to imager 50 without passing The passage of PCB40 central opening.

--front window 64, the layout of primary mirror 62 and PCB40 allow reader 10 to be configured to only with single PCB (PCB40 includes lighting electronics, imager 54 and other parts), and it is maintained at the relatively large observation size of window 64 And near the vertical layout between direction of observation 80 and window 64.Therefore, in reader 10, the layout of assembly can be the most right Than the reader 250 that figure 12 illustrates, reader 250 has single plate (PCB) 252, and it is with big central indentation 254 (reader 250 can include multiple plate) and be arranged on multiple illumination LEDs 258 of an end of plate 252.In reader 10 The layout of assembly can also advantageously contrast the reader 275 that figure 13 illustrates, and reader 275 has with wide-angle tilt Window 276 and for accommodating tilting and deep mechanical groove region 278 after scanner nose 279 of window 276.Figure 13 illustrate the imager 280 being arranged on PCB282 further, and this imager has the visual field or image path focused on by camera lens 286 Footpath 290, imager 280 obtains/two dimensional image of captures object/target.Visual field by the illumination LED 288 being arranged on PCB284, 289 illuminate.

Reader 10 is shown as vertically-oriented reader, i.e. window 64 and is oriented general vertical, but can use Privot mechanism, is adjusted to the position being oriented to tilt obliquely or the position tilted obliquely by this unit orientation.

Fig. 6 and Fig. 7 illustrates the optical pickup 100 and 150 of the similar configuration according to the first and second selective embodiments. The reader 100 of Fig. 6 include with above, the shell 110 of vertically-oriented window 120.The image of scanning area visual field is worn Cross window 120, the first image path section 130 being reflected down by primary mirror 122 along image, arrive along the second image path section 132 By image to the secondary mirror 124 of side and retroeflection, arrive along the 3rd image path section 134 and include lens system 126 and obtain Take/imager the molectron of the detector array 128 of captures object two dimensional image.Sensor array 128 can by be arranged on as Support with the PCB of the rear wall of the shell 110 in 10 similar structures in the reader of Fig. 1.Primary mirror 122 is oriented opposite windows 120 acutangulate.Acute angle is preferably between 30 ° and 60 ° or the grade of 45 °.

The reader 150 of Fig. 7 include with above, the shell 160 of vertically-oriented window 170.Scanning area visual field Image through window 170, the first image path section 180 being reflected down by primary mirror 172 along image, along the second image path section 182 arrive image to side and the secondary mirror 174 that upwards reflects backward and slightly, arrive general along the 3rd image path section 186 The 3rd mirror 176 that image is reflected down, arrives along the 4th route segment 186 and includes lens system 177 and obtain object two dimensional image The imager molectron of detector array 178.Sensor array 178 can be by being arranged on such as 10 classes in the reader of Fig. 1 PCB support like the base wall of the shell 160 in structure.Primary mirror 172 is oriented opposite windows 170 and acutangulates.Acute angle is preferred Between 30 ° and 60 ° or the grade of 45 °.

There is two-mirror system (primary mirror 122 He of the reader 100 of inner track more shorter than the three-mirror system of reader 150 Secondary mirror 124) need bigger enclosure depth, in order to reach the visual field as reader 150 and the depth of field.

Fig. 8 illustrates another selective reader 200.Reader 200 has three bounce-backs (three-bounce) mirror and joins Put.Reader 200 includes the shell with vertically-oriented window 220.The image of scanning area visual field passes window 220, edge The first image path section 230 that image is upwards reflected by primary mirror 222, arrives image to side along the second image path section 232 The secondary mirror 224 upwards reflected backward and slightly, arrives the 3rd mirror of image retroeflection along the 3rd image path section 234 226, the imager molectron including lens system 227 and detector array 228 is arrived along the 4th route segment 236.Mirror edge is excellent Choosing is positioned close to scanning space, in order to minimize the reader degree of depth.Sensor array 228 obtains the X-Y scheme of target/object Picture, and it can be by the PCB support of the rear wall of the shell 110 being arranged in the reader as Fig. 1 in 10 similar structures.Unlike Embodiment before, the off-axis light 290 reflected from primary mirror 222 can be from window 200 retroeflection, and along mirror 222,224 With 226 path 294 return, it is undesirable to ground arrive sensor array 228.

In order to realize desired window scanning area, suitable optical path length is 130mm.Use reader 200 Three bounce mirror configurations, the minimum-depth of reader can be less than 60nm.Reader 150 two bounce mirror configuration may require that more deeply Degree.But the configuration of single bounce mirror may require that high reader.

Figure 14-19 illustrates the data reader 300 of another embodiment.The specifically shown reading with shell 310 of Figure 14-16 Taking device 300, shell 310 has pivotal attachment in the upper member 312 of base or support part 313.Upper case parts 312 with Connection between base member 313 preferably includes privot mechanism 314, and it allows upper case parts 312 relative to base member The inclination of 313.Reader 300 is included in the front window 364(before upper case parts 312 and is removed in Figure 14-15 but at figure Shown in 16).In Figure 14-16, it is shown that reader 300 in obliquity so that window 364 is by general vertical orientation and big Body aspect-oriented, so for reading the bar code on the vertical side of project.Reader 300 can pivot downward-sloping so that window Mouthfuls 364 be oriented at the bar code that is suitable to read at project top obliquely towards direction, maybe can be pivoted up/tilt, Make window 364 be oriented at be suitable to read bar code bottom project obliquely towards direction.

Reader 300 can have the substantially curve-like upper case 312 of the hands crawl adapting to user.Optional starter Or actuation button 315 can be arranged on shell 312 suitable/facilitate on position；Alternatively, starter or actuation button 315 can be arranged on base member 313.Such as U. S. application 13/117563 or United States Patent (USP) 7243850 disclosed other Actuating mechanism is herein incorporated, for reference.Alternatively, shell 312 can be other structures, such as, have one or more window The box-shaped of mouth, or other configurations, the such as data reader disclosed in United States Patent (USP) No.7243850.

Reader 300 can be at the upper case parts 312 connected by suitable adapter (such as, RJ-44 adapter) Place is linked to main frame via cable 330, or it can via such as RF(such as, bluetooth, Zigbee), IR or microwave wireless Connect linked.Alternatively, cable 330 may be connected to base member 313, is particularly suitable for base part 313 with hand-held Pattern remains attached to the embodiment of upper case 312.

Reader 300 includes the one or more printed circuit board (PCB)s of the PCB340 being such as arranged in case member 312 (PCB).Main PCB 340 has a planar profile, and preferably towards after being installed or installed at case member 22 on rear side of case member 322 Side, is orientated and about acutangulates with front window 364.Acute angle is preferably between 30 ° and 60 ° or the grade of 45 °.It is installed to Electronic device on PCB340 includes that imager molectron 350(is made up of camera lens, sensor array 353 and aperture)；Micro-place Reason device 342(and other electronic circuits, such as memorizer, communication chipset, AD converter etc.)；Three groups LED372a、372b、372c；Speaker 336 and RJ-45 adapter 334.Adapter 334 is contained in the RJ-of cable 330 end 45 plugs 331.

Reader 300 functions/optics is similar to reader 10, but includes subshell or optical chassis 390.First mirror 362 and second mirror 360 be installed in and install and/or arrange in the optical chassis 390 of various optical module.Optical chassis 390 is excellent Select by molded optical plastic or provide other suitable construction of relative good accuracy structure to construct, when it is attached to/is installed to When PCB340 is upper, it is provided that the first and second mirrors 362,360 and anti-with imager 350 and LED372a-c on PCB340 Transmitter array 370 accurately alignment/arrangement in the enclosure.

As seen from the viewgraph of cross-section of Figure 16, the object 90 obtained view volume 5 from a perspective view Image is also propagated as follows: (1), along the first image path 380, through window 364, then arrives at primary mirror 362, (2) primary mirror Image is reflected down and to arrive secondary mirror 360 along the second image path section 382 by 362, (3) secondary mirror 360 by image upwards and/or to side Limit is reflected, is arrived imager molectron 350 along the 3rd image path section 384, and (4) imager molectron is via imaging array 353 Obtain two dimensional image, and be converted to the electronic form for processing/decoding by obtaining image.Imager group in this illustration Component is installed on PCB340/is supported by PCB340.Image can be by the acceptable focus camera lens being positioned at before imaging array 353 Focus on aperture (being similar to camera lens 52 and the aperture 54 of Fig. 3).Primary mirror 362 is oriented opposite windows 364 and acutangulates.One is shown Acute angle in example is selected between 30 ° and 60 °, especially the grade of 45 °.

For purposes of description and conveniently, the above-named UNC about the reader 10 of Fig. 1 is also applied for reading Taking device 300, wherein primary mirror 362 is the first reflecting surface of subject image, and secondary mirror 360 is the second reflecting surface.

Figure 17-19 illustrates the assembling scheme of the various intrawares for reader 300.Figure 17 illustrates in exploded view three Individual major internal components, namely optical chassis 390, illumination reflector molectron 370 and PCB340.Reflector group component 370 by suitable material, and such as molded optical plastic is constituted, and includes three transmitter arrays 374a, 374b, 374c, on Latch 377a, 377b, and lower bracket 376a, 376b install in portion.Reflector group component 370 is connected in the following manner PCB340:(1) installation latch 377a, 377b are arranged PCB corner otch or slit 341a, 341b；(2) by lower bracket The opening of 376a, 376b aligns with PCB aperture 403b, 403c；And (3) by screw 404b, 404c insert hole 403b, 403c and Through lower bracket 376a, the opening of 376b.As shown in figure 18, just it is installed on PCB340 once reflector group component 370 Position, reflector array 374a, 374b, 374c align with corresponding LED array 372a, 372b, 372c and surround corresponding LED battle array Row 372a, 372b, 372c.As shown in figure 16, column 377b have on PCB340/around the otch that slides, in order to provide anti- The secure connection at emitter molectron 370 top.

In an exemplary construction, optical chassis 390 with suitable molding process, such as injection molding for single-piece.Similar Ground, transmitter assemblies 370 can also be with suitable molding process, such as injection molding for single-piece.

Optical chassis 390 includes the first installation surface or framework 391 that primary mirror 362 is mounted above, and secondary mirror 360 is pacified Second installation surface 393 of top loading.Optical chassis 390 via appropriate number of leg support be installed on PCB340 ( In this example, use four leg support 394a, 394b, 394c, 394d).Reflector group component 370 in the following manner by It is connected to PCB340:(1) by leg support 394a, 394b, 394c, 394d and corresponding PCB aperture 403a, 403b, 403c, 403d Alignment；(2) screw 404a, 404b, 404c, 404d are inserted hole 403a, 403b, 403c, 403d(screw 404b, 404c also to wear Cross the opening of lower bracket 376a, 376b), and insert leg support 394a, 394b, 394c, 394d.Leg support 394a, 394b, 394c, 394d have inside the hollow with box thread, and screw can be fixed therein thus by solid for optical chassis 390 It determine/is installed on PCB340.

The position being installed on PCB340 by speaker 336, also simplify structure.Optical chassis 390 include with The hollow circular cylinder 396 of elliptical outer opening 392.The cover 337 being made up of scalable rubber or plastics is inserted into cylinder In (seeing Figure 17-18) rearward end of 396 and around it, then see 14-16 when optical chassis 390 is positioned in PCB340() Time upper, cylinder 396 aligns with speaker 336, and covers 337 and be inserted on speaker 336 and around it.Cover offer is raised one's voice Air between device 336 and cylinder 396 or acoustical seal.Therefore, the sound of speaker 336 is passed out ellipse through cylinder Circular open 392.Opening 392 can be oval, circular, square or any suitable shape.As for 337 will be covered Being aligned in the ancillary method on cylinder 396, optical chassis 390 includes the alignment struts relative to 396 1 sides of cylinder 397.Cover 337 includes the respective flange 338 with hole.When assembling, cover 337 is positioned and slides on cylinder 396, and method Orchid slides in alignment struts 397.

Being installed on PCB340 via optical chassis 390 and align, primary mirror 362 is arranged to become relatively relative to PCB340 Little acute angle, such as 10-15 ° or less grade.Figure 16 illustrates that mirror 362 is oriented at relative front window 364 about 60 ° and phase Angle to PCB340 about 12 °.Alternatively, optical chassis 390 can be configured to mirror 362,360 is arranged in other Proper angle, the such as angle of mirror 62,64 in above-mentioned Fig. 3.

The illuminator illustrated and LED group 372a, 372b, 372c are installed in the upper area of shell, the most each LED Group has three LED.LED group 372a-c is installed on PCB340, and the most each LED group is arranged on corresponding reflector battle array In row 374a, 374b, 374c, described reflector array operable by the visual field of LED illumination along desired export-oriented Route guiding.Instead Penetrate array or reflection cone 374a(to be observed on the right side of reader 300 by Figure 15) be formed as the cone with four reflective inner surface Shape, its operable reflection and guiding are from the light of three LED372a being arranged on bottom cone.Similarly, reflective array or anti- Pencil 374b(is observed in the left side of reader 300 by Figure 15) be formed as the taper with four reflective inner surface, it is operable Reflect and guide the light from three LED372b being arranged on bottom cone.It is internally provided with the 3rd reflection of three LED372c Array 374c is arranged between reflective array 370a and 370b.3rd reflective array 374c can have with four reflection tables The taper in face, but it is illustrated that the situation that lower reflective surface is removed.LED372c may be oriented to from being perpendicular to window 364 with little downward angle (about 10 ° to 15 °) direct light, thus light is less emitted directly toward user, and result is will not be to user Show the brightest light.

In order to describe purpose, the reader 10 of Fig. 1 illustrates with observation path 80(shown in broken lines), observation path 380 It is included in the view volume 5 before reader window 64.Similarly, the reader 300 in Figure 16 illustrates with observation path 380 (shown in broken lines), observation path 380 is enclosed in the view volume 5 before reader window 364.In these examples, observe Volume can be referred to as scan volume or scanning area, and scanning area is wherein to exist successfully to read to be placed in light in spatial volume Learn the 3d space volume of the high likelihood of code.It should be understood that the view volume illustrated in the drawings is not by window observable To the Precise Representation of volumetric region, wherein reader can read the object placed in the window by described window.Observe body Long-pending generally by window 64(or window 364) and reader pentrution in outward extending ultimate range limit.At other figures In view volume can illustrate in a similar manner and describe. but also it should be understood that in the reader 10 of Fig. 1, from illumination The light of system 70 is through the top of window 64, and in this illustration, view volume 80 is limited at the bottom of window 64.Supply Selectively, front window can be bisected into separate window, and window is for the light path of illuminator 70 and a window For image path 80.The assembly describing reader 300 can be similar to.

Mirror assembly preferred high-quality reflective optical device, and can be by suitable technique, such as by monoblock or substrate (such as, metal or plastics) then applies reflectance coating and is formed.

Reader 10 and reader 300 illustrate with three LED array for illumination, but can use less or more Many arrays.Although it is not shown, the reader 100 of Fig. 6 can provide similar illuminator with the reader 150 of Fig. 7. In certain embodiments, the different wave length of light directed can illuminate the zones of different of the object from different perspective views.At certain In a little embodiments, one or more light sources can operate in a pulsed mode, and impulsive synchronization is in the frame rate of imager.Show at one In example, imager can select the frame rate of 30Hz, uses one or more light source to illuminate reading area and pulse is 60Hz.Light The example of source pulse is in United States Patent (USP) No.7234641, and it is herein incorporated, for reference.

And, although the configuration of the reader 10 that figure 1 illustrates and the reader 300 that figure 14 illustrates has single Plane PCB40/34, but other configurations can be implemented.Such as, PCB can be nonplanar.Alternatively, reader is permissible Including many PCB.In an example of two PCB construction, reader includes that (1) includes the first of imager and microprocessor PCB, is mounted with the first mirror or optical chassis wherein；And (2) have the 2nd PCB of illumination LED, illumination reflector is mounted Above.

In addition to the change stated before and combination, various embodiments can favorably use in United States Patent (USP) open Camera lens disclosed in No.2007/0297021 and light barrier, other layout and/or image capture technology.

In yet another aspect, Figure 10 illustrates the reader 10 for reader, such as Fig. 1 or the reader of such as Figure 14 Configuration installed by the mirror of the mirror in 300.Generally as it is shown in figure 9, mirror 202 is via in mirror 202 rear surface with in installation surface 200, example Such as the two-sided tape 204 on rear wall, it is arranged in scanner housing.According to the structure that figure 10 illustrates, it provides with opening The mirror basket of mouth 212 or shell wall 210, mirror 215 is positioned in after opening 212, and by between mirror 215 end face and wall 210 Two-sided tape 214 fix.Alternatively, mirror 215 can be via binding agent, via clip, or some other the most attached Company/fixed mechanism is fixed on wall 210.Such as, Figure 11 illustrates selective attachment mechanism, and its mesospore 210 includes outer lip 211, And mirror 215 is fixed to lip 211 by clip 220,222 and the compression foam band 214 between being arranged on.

Compared with conventional configuration as shown in Figure 9, the edge of mirror 215 is sightless (being hidden in after basket opening 212), And the visible reflectance region of mirror is defined by the size of opening 212.The visible reflectance region of mirror 215 is considered is opened by wall Mouth 212 is confined.It is additionally, since reflector space to be defined by the size of opening 212 rather than the size of mirror 215, so the public affairs of mirror 215 It is loose that difference requires.

Fixing virtual scan line pattern, it is preferable that omnidirectional mode can be used for decoding image, such as by Oregon Used by the Magellan-lOOOi type scanner that Datalogic Scanning company of Eugene city manufactures.In some embodiment In, selective technology, the such as process in (a) view-based access control model storehouse can be used can be used for one or more imager；(b) According to the process of virtual scan line pattern Yu the mixing in vision storehouse, such as every n frame calling vision storehouse is once.

In order to reduce the process needed for the quantity of memorizer and decoding linear packet and storehouse bar code, suitable void can be used Intend scan line processing method.VSL is the linear sub-set of the two dimensional image being disposed in all angles and skew.These virtual scans Line can be treated to one group of linear signal to be conceptually similar to the laser scanner mode of flying-spot scanner.Can use one-dimensional Filter kernel replace full two dimension kernel to make image be apparent from, thus significantly reduce the demand of process.

The rotationally symmetrical character of lens blur function allows need not any pixel outside virtual scan line boundary In the case of, there is the clear process of linear change.Virtual scan line is assumed generally normal to bar.Bar can absorb in Non-scanning mode axle Blur spot modulation, produce line spread function in scan axis.Position regardless of virtual scan line, consequent line Spread function is identical.But, due to pel spacing, according to rotating, (45 degree of virtual scan lines have than horizontal or vertical scanning The pel spacing of the big 1.4X of line) change, the scaling becoming clear equalizer needs along with angle changes.

If imager obtains the image of stack strip code sign, such as data strip or PDF-417 code, imaging device is permissible Start omnidirectional scan line mode (the most comprehensive pattern), then determine which scan line and bar code are alignd most.Then, This pattern goes for the next one or frame later more closely and the direction of bar code and aligned in position, such as, be spaced closely together Parallel lines pattern.Therefore, compared with the reader of whole image in each frame of process, equipment can use a small amount of process to read quilt The bar code blocked and the bar code of storehouse.

By be referred to as splicing process, the incomplete part (from multiple perspective views) of light code can merged formation complete Light code.Although splicing being described as UPCA label, a kind of the most frequently used optical code class herein by the mode of example Type, it is to be understood that splicing can be applied to other optical tag types.UPCA label has in the left side of label and right side " security bar ", and there is protection pattern in center in centre.Each side has and is coded of 6 numerals.Differentiate left-half Whether be decoded with right half part is possible.Left-half and right half part are decoded respectively, then will be decoded result and close And or be stitched together, in order to it is possible for producing complete label.From two panels, label is spliced into a side is also possible 's.In order to reduce mistake, it is desirable to these incomplete scannings include some overlapping region.Such as, pattern representation is protected in end For G, and center protection pattern representation is C, then encodes UPCA label 012345678905, then this label can be written as G012345C678905G。

Splicing the left half and the right half part, can bring reading G012345C and C678905G, and they being put together obtains Complete label.The left-half of 2 digital overlay is spliced, reading G0123 and 2345C can be brought, in order to reach G012345C.One example virtual scan line solution code system can export and be short to be protection mode and 4 digital labei sheet.Make Regular with splicing, that complete tag can decode from the same of same photographing unit or successive image sheet, or from multiple photographing units The sheet of picture decoding assembles.The further detail below of splicing and dummy line scan method in United States Patent (USP) Nos.5493108 and Described in 5446271, it is herein incorporated, for reference.

In certain embodiments, data reader includes imageing sensor or array, and it is gradually exposed to obtain with rolling Image based on Dong, such as cmos imager and rolling shutter.Imageing sensor uses processor detection and quantitative ambient light Intensity.Intensity based on ambient light, processor controls the time of integration of the row of cmos imager photodiode.Processor also may be used To coordinate when the light source of the time of integration of intensity based on ambient light and photodiode row pulses.

According to ambient light and the amount of the time of integration, light source can often be pulsed one or more times by frame, in order to produces motion mesh Target stop motion image, wherein said stop motion image is suitable for processing the data that decoding is represented by moving target.? Under bright environment light condition, such as, processor can promote to go in the case of not having pulsating light source, in succession with relatively short The time of integration integration, its produce moving target tilted image.In intermediate light conditions, such as row can be in succession bright to be similar to The integration time of integration of bright ring border optical-integral-time, processor every frame pulsating light source is several times, in order to produces and divides it with image portion Between the stop motion image of moving target of multiple skews.When light pulse can cover fuzzy, the tilted image of moving target, Produce image section.Under low environment light condition, such as, processor can promote row in succession to amass the relatively long time of integration Point, and during same time period when all row are at integration, can with pulsating light source once.The individual pulse of light produces permissible Covering moving target is fuzzy, the stop motion image of the moving target of tilted image.

In certain embodiments, data imaging device includes multiple cmos imager and has multiple light source.Different Cmos imager " sees " different light sources, in other words, never detects by different cmos imagers with the light of light source.Work as CMOS When imager operates in relatively similar frame rate, the image of relative synchronization can be obtained by multiple cmos imagers, and does not has Have and cmos imager is synchronized.Such as, a cmos imager is used as main imager, in order to when the main cmos imager of several rows When integration, all light sources are pulsed.

Another embodiment every frame pulsating light source is more than once.Preferably, when several rows integration, light source is pulsed, and The quantity of integration row is less than the total quantity of row in cmos imager.In certain embodiments, the total quantity of row in cmos imager Being integrated the result that capable quantity removes is integer.Alternatively, in other embodiments, the total quantity quilt of row in cmos imager The result that the quantity of integration row is removed is not integer.When in cmos imager, the total quantity of row is integrated the result that capable quantity removes and is During integer, picture frame can be divided into the section that each frame is identical.On the other hand, amassed when the total quantity gone in cmos imager When the result that the quantity of branch is removed not is integer, continuous print picture frame can be divided into different sections.

Other embodiments can use mechanical shutter to replace rolling shutter, in order to obtains the stop motion figure of moving target Picture.Mechanical shutter can include blocking light be in close contact CMOS or other suitable imageing sensors, be attached to shutter soft Property component.Shutter can be attached on bobbin, and wherein said bobbin has the conductive material being wound around bobbin spool section, wherein Spool section is facing away from shutter.The spool section of bobbin can be the one or more permanent magnets of approximation.When electric current is by being wound around When conductive material on spool runs, produce magnetic field, the magnetic field interaction of one or more permanent magnets, make shutter movement It is in close contact CMOS or the position of other suitable images sensors to allowing light.

The improvement imaging technique of these and other is in the U.S. of entitled " Systems and Methods For Imaging " Describing in detail in published No.2010/0165160, it is herein incorporated, for reference.

Reader 10,100 and 150 is shown as the single window reader with vertically-oriented window, but it can be closed And to other configure in, such as in supine sales counter/horizontal reader.In another configures, multiple reader modules From different directions/perspective view can be arranged on provide in the multiwindow reader reading view volume.

Although the data reader primarily with regard to coroner's auxiliary described, but reader described herein and method May be used for from checkout system.Optical pickup described herein may be used for automatic reader, such as by multiple observation windows Tunnel scanner that mouth obtains multiple perspective views, that use many reader modules.

It will be apparent that distribution subject disclosed herein can be incorporated in other distribution subject one or more disclosed herein Together, as long as this merging does not excludes each other or inoperable.

The term of above-mentioned use and the mode only by explanation that describes are illustrated by, and do not provide constraints.This area Technical staff it should be understood that in the case of without departing from its general principles, the details of above-described embodiment can be done Go out many changes.

Claims (12)

1. the optical code reader (10,200,300) being used for obtaining the image of the object in view volume, its bag Include:

Shell (20,310), has outward opening in its front；

Window (64,364), it is arranged in described shell (20,310) near described outward opening；

Planar printed circuit board (40,340), its arrange towards described shell rear portion and be oriented relative to described window (64, 364) the first acute angle is become；

Primary mirror (62,362), it is arranged in described shell (20,310) and becomes the second acute angle relative to described window (64,364), The first perspective view for the described object guided along the first viewing section path (82,382) in described view volume；

Imager (53,353), it is upper near described primary mirror (62,362) that it is installed in described printed circuit board (PCB) (40,340)；

Secondary mirror (60,360), it is arranged in described first viewing section path (82,382), with towards described imager (53, 353) guiding described first perspective view of described object, described imager (53,353) can run with from described first perspective view Obtain the two dimensional image of described object；

Illuminator (70,370), it is arranged on described printed circuit board (PCB) (40,340), for illumination light is directed to institute State in view volume,

Wherein said illuminator (70,370) and described imager (53,353) are arranged on described printed circuit board (PCB) (40,340) The same side on.

Optical code reader the most according to claim 1, wherein said printed circuit board (PCB) (40) and described primary mirror (62, 362) it is arranged parallel to each other.

Optical code reader the most according to claim 1, wherein said printed circuit board (PCB) (40) be arranged to relative to Described window (64,364) becomes the first acute angle between 30 ° and 60 °.

Optical code reader the most according to claim 1, wherein said primary mirror (62,362) is arranged to relative to institute State window (64,364) and become the second acute angle between 30 ° and 60 °.

Optical code reader the most according to claim 1, it farther includes optical chassis (390), wherein said master Mirror (362) and described secondary mirror (360) are alignd by described optical chassis (390), and are arranged on described optical chassis (390), its Described in optical chassis install on the printed circuit board.

Optical code reader the most according to claim 5, wherein said optical chassis (390) includes described primary mirror And the mounted superincumbent one-piece molded parts of described secondary mirror (360) (362).

Optical code reader the most according to claim 1, wherein said illuminator (70,370) and described imager (53,353) are arranged on the same side of described printed circuit board (PCB) (40,340), but contrary at described primary mirror (62,362) End.

Optical code reader the most according to claim 1 (200),

Wherein said imager (228) includes 2D imager, and it is arranged on described outer casing underpart；

Window (220), it is arranged in the housing near described outward opening and be parallel to described outward opening；

Wherein, relative to described window (220) be installed as into the described primary mirror (222) of described first acute angle be arranged for by Described first perspective view of the described object in described view volume is along described first viewing section path (232) downwardly and forwardly Guide；

The described secondary mirror (224) being provided with in described first viewing section path (232) is arranged for described object Described first perspective view guide along the second viewing section path (234) from described primary mirror (222)；

Described optical code reader also includes the 3rd mirror (226), and it is arranged in described second viewing section path (234), with For described first perspective view of described object is directed to described imager (228) from described secondary mirror (224).

Optical code reader the most according to claim 1, inner opening in the housing installed by wherein said primary mirror After, described primary mirror has the viewing area limited by described inner opening.

Optical code reader the most according to claim 9, wherein said primary mirror is via the top being fixed on described primary mirror Double-sided belt on portion's reflecting surface and be mounted.

11. 1 kinds are used for the method reading the optical code on the object in view volume, and it comprises the following steps:

First imager (53,353), primary mirror (62,362) and illuminator (70,370) are positioned at reader housing (20, 310) in so that described first imager (53,353), described primary mirror (62,362) and described illuminator (70,370) are propped up Support is in common circuit board (40,340), and wherein said imager is arranged in described common circuit board close described primary mirror, with And described illuminator and described imager are arranged on the same side of described common circuit board；

Window (64,364) is located adjacent to and is parallel to opening in an end of described reader housing (20,310) Mouthful, wherein said primary mirror is installed and is become the second acute angle relative to described window in the housing, and described circuit board (40, 340) it is oriented and becomes the first acute angle relative to described window (64,364)；

From the first perspective view via the first mirror group by the first visual field of described first imager (53,353) from described first imaging The position of device is directed in described view volume；

The first image is formed to institute from described first perspective view is described first imager (53,353) of described first visual field State in view volume；

Described first imager (53,353) is utilized to obtain described first image；

Based on one or more image obtained by described first imager (53,353), process described optical code.

12. methods according to claim 11, it farther includes

Thering is provided the optical chassis (390) with individual construction, wherein said optical chassis (390) has for including described primary mirror And the installation site of described first mirror group of secondary mirror (360) (362).