TWI261207B - Scan module for a system for electro-optically reading indicia - Google Patents

Abstract

A retroreflective optical scan module, for example for in a bar code reader including a light source mounted on the base of the module and at least one fold mirror for reflecting and redirecting the scanning light beam along an optical path which is parallel to the base and over at least a portion of the top side surface of the module, so that the scanning beam is longer than the length of the side of the module which the scanning beam passes over enroute to the target.

Description

1261207 A7 B7 V. Description of invention (

RELATED APPLICATIONS This application claims priority to U.S. Provisional Patent Application Serial No. PCT/A. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. 6,491,222), the application is part of the US Patent Application No. 09/048,418 (now awarded US Patent No. 6,114,712) filed on March 26, 1998. In the case of the case, both applications are incorporated herein by reference. FIELD OF THE INVENTION The scope of the present invention relates to electro-optical readers or scanning systems, such as bar code symbol readers; more specifically, to the design of optical paths in a scanning module, if we are to be near a small bar code reader The scanning module can be used in the reader by generating a longer single-line scan line. Description of Related Art Electro-optical readers such as bar code readers are now common. Basically, a code symbol includes one or more columns of bright and dark areas, which are generally rectangular in shape. The data is entered into the symbol by the width of the dark area (i.e., the stripe) and/or the width of the bright area (i.e., the area between the lines). A code symbol reader illuminates the symbol and senses reflected light from regions of different light reflectivity, detecting the relative width and spacing of the regions, and deriving the encoded data. Barcode reading data entry systems improve the efficiency and accuracy of data entry in a variety of different applications. This system has the characteristics of easy input of data, which is convenient for us to improve the frequency and detail of the round-in data. For example, to improve the efficiency of inventory, tracking work, China National Standard X 297i ¥

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1261207 Five inventions (A7 B7 members must be willing to read the machine must, second class. But if you want to achieve these advantages, the user can use the reader in a consistent and consistent manner. Therefore, it is easy to operate. - Optical field. Scarf - a kind of reading system of special wealth, r, which can be made - μ (for example - laser beam) swept - symbol t 4 national patents 4, 387, 297 and 4, 76G, 248 type system And most of the components have readable marks, ::: == the part of the radiance is different (that is, the mark is a mark of = = =) and the mark is in the - P-p machine - special work Scope, or read distance from the scanner. These patents are hereby incorporated by reference herein in its entirety in the entire disclosure of the disclosure of the disclosure of the disclosure of Guided by a single laser beam, or other optical component in the light path, the target-to-target' target includes a bar code symbol on a surface. The beam-shifting scanner is operated with a motion device or - scanning member (for example the light source itself, or - located in the beam path The mirror in the path) causes the beam to be traced by one or two columns of traversing symbols. The scanning member can move the beam point across the scan line of the symbol and/ σ a symbol pattern, or make the light The point scans the field of view of the scanner, and (4) the two are in parallel. We can use an optical or optomechanical device to move the laser beam to generate a scanning beam. To perform this action, one is to shift the beam (for example, using a A mobile photonic element (such as a mirror), one is a moving light source itself. U.S. Patent No. 5,486,944 describes a scanning module in which a mirror is mounted on an X 297 mm) paper scale applicable to Chinese national standards ( CNS) Α4 Specifications (210 1261207

Hey! On the raw material, the yoke reciprocates by electromagnetic attraction. In the U.S. Patent No. 5,144,12G to the Japanese Patent No. 5,144,12, the laser, the optical, and the sensor components are mounted on the drive-by-driver. The shaft reciprocates in the same plane. / - The bar code scanner uses an electronic device to shift the beam, so as to sweep the m two: move the beam in a mechanical motion or make the beam 1j and 5, we can use a linear array 2 light source' and rule The sequence, one of the light sources is activated at a time = eight to the bar code symbol, thereby exciting the scanning beam of the single source. If the light source is not an early-linear array, it may be arranged in an array comprising a plurality of columns to produce a plurality of scan lines. The bar code reader is disclosed in U.S. Patent No. 5,258,605, issued to M. et al. The reading system also includes a sensor or photodetector that detects reflected or scattered light. The photodetector or sensor needs to be disposed in an optical path in the scanner to ensure that the field of view of the photodetector or the sensor can capture - part of the light reflected or scattered from the symbol. It will be converted to an electrical signal. U.S. Patent Nos. 5,635,7,5,682, 〇29, and 6,213,399 describe different arrangements of photodiodes. If the light is collected in the form of reflections in the future, we can use the _single-optical component (for example, a reciprocating oscillating mirror, such as U.S. Patent No. 4,816,661, issued to Krichever et al., or the US patent issued by Shepard et al. Illustrated in the specification of No. M. The beam sweeps the _ target surface and directs the concentrated light to a Detector

1261207 A7 -----~ _-_ Β7 V. Description of invention (4 ~~-_____-_ is measured as γ where the surface of the mirror is usually large, and as much as possible, more incident light is collected. We only need to use A small detector, because the mirror can combine the light and the 'spring I' on a small detector surface, so that the signal-to-noise ratio can be improved. Of course, it is better to use a small scanning element because it consumes The energy is better than ^ but the frequency response is larger. However, if the scanning component is small to a certain extent, the area of the scanning mirror is heated as the opening of the collected light. The solution can be to use the always-on detection system (a non- a retroreflective system) that receives light signals from the entire range covered by the scanning laser spot. The wind right collects light in a non-retroreflective manner to concentrate the light that reflects the laser light: the component will be described Use "Optical Talents are different. They will be scanned with the beam..., and their construction often has a large field of view to facilitate reflection of the laser across the detector's table.» Due to the optical components used for scanning (eg a rotation) Mirror) only need to deal with the external shot Beams, we can greatly reduce the size. As for the detection benefit, it must be large, and receive the incoming beam from any position in the scanned range. ^ Road and software can decode the electrical signal and display it in digital form: : The data represented. For example, a digitizer can convert the cheek-like electrical signal of the paste to a width-modulated pulse width corresponding to the physical width of the stripe and its spacing. Another method of processing is to directly process the analog electrical signal by a decoder: for example, see the description of U.S. Patent No. 5,504, 391. The clear selling system is usually decoded in the following manner. The signal or the analog signal of light and heart can be filtered and processed by circuit and / or software first, -9 -

1261207 A7 P-- ---B7 V. INSTRUCTIONS (5) ^1~~ 俾 Remove noise, adjust dynamic range, or compensate for signal non-uniformity. The samples are then taken from the analog signal and sent to a class to digital conversion to ', and the samples are converted to digital data. See, for example, U.S. Patent No. 6,170,749, the disclosure of which is incorporated herein by reference. Another approach is to digitize the shape of the signal with an analog circuit. If you want to move the beam along the desired scan pattern, there are many mirrors and motors that can be used. U.S. Patent No. 5,621,2, 312 describes a scanner that produces an elongated scan line. U.S. Patent No. 4,25,798 discloses a rotating polygon having a planar mirror on each side, and each mirror can follow a scan line of a traversing symbol. U.S. Patent Nos. 4,387,297 and 4,409,470 each use a planar mirror mounted on a drive shaft and reversibly driven to alternately reciprocate along the forward and reverse circumferential directions of the drive shaft. U.S. Patent No. 4,816,66, the disclosure of which is incorporated herein incorporated by reference in its entirety in its entirety in its entirety in its entirety in its entirety in its entirety in its entirety in its entirety in its entirety. The multi-mirror structure is mounted on the drive shaft and can be driven in reverse, and the crucible is reciprocated along the forward and reverse circumferential directions of the drive shaft. U.S. Patent No. 6,247,647 describes a design for providing a multi-line or single-line scan pattern using a controller. All of the above US patents are incorporated herein by reference. In electro-optical scanners of the type described above, components such as laser sources, optical components of the mirror structure, drivers for oscillating the structure of the mirror, light detection, and associated signal processing and decoding circuits, etc., will be scanned. The size and weight of the machine. In applications that require long-term use, large and heavy scanning opportunities can be frustrating for users. If the use of the scanner makes the user feel tired

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1261207 A7 B7 V. Invention Description (6 Labor or inconvenience, the user should not use the fixed and consistent method to use '5 heart-drawing machine. If the user does not want the purpose... use the scanner' It is impossible to achieve the purpose of collecting the fund (that is, designing the bar code - a small and thin exchangeable sweeping father).: In addition, we also need the emperor brain, the interchangeable type of tracing group, which can be installed in the notebook. Xunyue has brought to the digital assistant, call crying, wide "+2 type device and other small attacks." Inciting the phone, and other pockets, therefore, the current development of a bar code reader machine body shape. Who still need who The system can be used for small readings. The size and weight of the V-small scanning module are similar to those of the reading machine. I: More: The group 'single-scanning line can be used to read the mouth of the scanning movement. The quality of the electrical components should be oscillating, and it is better to modularize the scanning engine into different devices. We still use the sam special group to reconfigure all the necessary scanner components required for these applications. Wedge group, summary of the invention The object of the present invention is to provide a module for the bar code emission - the strip is elongated in the vicinity of the module. The other object of the present invention is to provide a module, the top surface of the module and the top surface Parallel scan lines. Another object of the present invention is to provide a plurality of reflective scanning modules. Detecting Jay's non-backward Another object of the present invention is to provide a selective patterning according to Adjusting the optical power at the position on the scanning line. Optical component 'the recording tape -11 - 1261207 V. The invention provides a non-retroreflective electro-optical scanning module with a thickness of 2nd and 2nd. It is smaller than when using individual optical components, but it has a commercial area of at least 20 square mm. ^There is a module with a stepped form factor, which is the basis of the printed circuit board. The other purposes of the present invention will be apparent to those of ordinary skill in the art, which are disclosed herein (including the description) and the implementation of the present invention. Invention = as a reference object, but should understand The present invention is not limited to this.;:: The person who has the ordinary skill in the technical body is referred to herein = object use, modification method, and specific example heart: genus: day...: circumference and the invention can play a significant role therein The utility model is as described herein and the scope of the patent application. The invention provides a scanning group suitable for reading a barcode, wherein the barcode reading system is used for reading a mark, wherein a portion having f reflectance differences, and located at a distance from the scanning module, the scanning module includes a substantially rectangular module, and the support member Having a substantially planar pedestal, and/or a planar peripheral side of the 4 pedestal: a laser source mounted on the S support to produce a beam; a scanning mirror mounted And on the S support, and maintaining a spacing from the light source, the mirror can move the light beam from the light source along a first optical path by its position, and shoot onto the folded reflection mounted on the support member. a mirror that guides the beam -12- 1261207

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BRIEF DESCRIPTION OF THE DRAWINGS (FIG. 1 is a perspective view of an optical assembly. ·,,, and, according to a first preferred embodiment of the present invention, FIG. 2 is a perspective view of a special square + a second preferred P ♦ σ1 </ RTI> shows an optical assembly according to the invention J: a specific example. Fig. 3 shows how the use of four separate lights is used in the optical replacement of the actual image _ according to the invention. Figures 4 and 5 show the operation of a light-collecting lens in a ship-R, in the body example of the present invention: and (4) before and after the collecting lens according to the second example of the present invention. A detailed description of a preferred embodiment and a bar code reader that uses ten to read a bar code symbol and is generally of the type described in the above patent. In this specification and application, the term "&amp; bar code symbol" should be interpreted broadly. JL not only forms the form of the 刑 FI , but also covers other drawing columns such as dot or matrix array patterns; in short, the marks it covers can be different from the reflectivity or surface features, resulting in I have measured the .&quot; birth number feature. We can use these features to encode the data, which is read and decoded by a device of the type shown herein. In the following, it will be explained how to implement the present invention in a laser scanning bar reading module similar to the module shown in the drawings, and as a preferred embodiment. The modular device shown in Figure 1 is generally of the type described in U.S. Patent No. 5,367, the disclosure of which is incorporated herein by reference in its entirety assigned in its entirety in the the the the the the the the the the the the This paper; the structure of the modular device shown in Figure 1 is similar to that of H〇itsviiie, New York.

Symbo! Technologies, Inc. - bar code reader, its catalogue - 14 - This paper scale applies to China National Standard (CNS) A4 specification (210 X 297 mm) A7 B7 1261207 V. Invention Description (10) For SE 1000 or SE 12〇〇. In the manufacture of the bar code reader module shown in Fig. 1, 'U.S. Patent Nos. 4,387,297 and 4,76,248 (issued to Swartz et al.) or U.S. Patent No. 4 4〇9 47 The characteristics of the number (granter) 'These patents have been given to Synibol Technologies, Inc.. U.S. Patent Nos. 4,760,248, 4,387, 297, and 4,409,470, the disclosures of which are incorporated herein by reference. The module 200 shown in FIG. 1 is formed by a body frame or assembly 201, and has a shape substantially a rectangular parallelepiped, and has a front wall surface 2, 2, and 203 and 204, preferably one open. a frame wall 2〇5 and a bottom surface (not shown), wherein a laser beam 206 can be scanned over the top surface along a scan path 216, the bottom surface being closed by a printed circuit board 2〇7. Electrical components can be mounted on the board. A laser diode assembly 2〇8 mounted on the frame 201 produces a beam 209 which is ejected from an opening 21 of the laser diode assembly. The beam 209 will be directed at the scanning mirror 211 and reflected therefrom, and then the beam folding mirror 213 (only the edges of which appear in the figure) will be scanned along the path fe212, which is mounted to the front wall 202 of the assembly. The beam folding mirror 213 will reflect the beam so that it is directed along the path 214 toward the beam folding mirror 215. The beam is then reflected by mirror 215 and directed through beam 206 above frame wall 205 and outside of module 200 toward target 228. The symbol scatters or reflects light to the rear collecting lens 2 1 7 and 2 1 8 , which is a photodetector. Also shown is a drive coil 220 and a movable mirror assembly 219 that can support the mirror 211 and move with changes in current within the drive coil 220. -15- This paper scale applies to Chinese National Standard (CNS) A4 specification (210 X 297 mm)

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Line 1261207 V. Description of the Invention The operation of the laser diode assembly 208 can be performed using a continuous "mode" and "power" mode I depending on the power level at which the pulse is generated or used. Five me. Zhou Ai, it is necessary to maintain the output of the laser diode at a specific rate:: Rating, this is a known practice, 'that is, using - closed two-circuit circuit', the circuit uses one and the other Diode body electric diode. An optical 3 and/or hole-pinch cabinet associated with the laser diode assembly 2〇8, which can be used according to different purposes; =: (spherical symmetrical glass or plastic lens; non- Spherical glass or whether it has rotational symmetry to the optical axis, such as steep refractive index lens, phenanthrene lens, binary light, see or 旎 旎 疋 optical lens; lens system, where the lens is straight It can be used as a functional aperture stop for the system alone; or a holographic optical element, including but not limited to a Fresnel "strip" optical component. Referring now to Figure 2, another beam of view from another perspective is directed to an optical component 211 (such as a J-field Ding Tian Han Mirror), which can be moved to the front, and the beam is beamed. The offset is directed outside the module 200 in the direction of a target plane. The optical sub-assembly can focus the beam, and on the target plane, a point is formed which will move along the scanning path 216 as the mirror 211 moves, sub-striping a strip of code symbols 228 on the target plane. The optical element 211 is mounted on an assembly 219. If an alternating current is introduced into the coil 220, the assembly will be swung. This oscillation will cause the element 211 to move in an arc. The scanning mirror 211 is swingable about one axis after mounting. For this purpose, can be -16- This paper scale is applicable to China National Standard (CNS) Α4 specification (210 X 297 mm) 1261207 Five invention instructions (12 A7 B7 ^Assisted permanent magnet 221 and a driven electromagnetic coil 22 Interaction: Five people can send a driving signal to the coil through the printed circuit board (PCB) 2〇7 and the electrical contact of the coil. I Tian, Figure 1 is not a scanner motor driver 220 is an example </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; Any of these configurations are incorporated herein by reference. Thus, a static optical component assembly can be used as a component in a variety of scanner designs. Photodetectors 224-a, 224b, 225a And, after receiving the light reflected by the symbol, the photodetectors are separated from each other in the drawing, and are mounted behind the collecting lens 222. The sub-assembly or device in FIGS. 1 and 2 can be Applied in any fixed or portable barcode reader. After that, the output signal of the photodetector is transmitted to the appropriate electronic components in the PCB 226. In order to increase the depth of focus of the optical debt detector, we can use a light-shielding opening in front of the optical debt detector. The area of the device itself can achieve the same effect without using the opening. In another preferred embodiment, the type of motor driver used to oscillate the scanning mirror can be a Myl_chip spring that can support an imbalance The mirror assembly 2 is mounted on a leaf spring which will bend when the AC coil drives the permanent magnet, thereby generating a swinging force -17- The paper scale is applicable to the Chinese National Standard (CNs) ^i^7〇X 297 公董y 1261207 V. Description of the invention (an alternative method uses a "micromechanical" mirror assembly as described in U.S. Patent Application Serial Nos. 08/506,574 and 08/631,364. According to the declaration, the wood &amp; shot can be moved back and forth directly under the drive of the appropriate drive motor (the size of which is preferably very small). Another alternative is to use a mirror of the type known as a rotary type. Polygon, see According to the patent, the mirror includes a solid body having a plurality of mutually inclined surfaces. When the body is rotated, the polygonal body is continuously rotated. The surface allows the beam to be scanned. In the case of the carcass, the Mylar motor can be used for one-dimensional scanning design, a V-shaped band. Components (as mentioned above) can be used for two-dimensional scanning. More preferably, the preferred laser device 2〇8 is a semiconductor laser device and is mounted on the PCB by conventional through hole technology. The photodiode is preferably an SMD (surface mount device) device, the aforementioned Mylar The AC coil of the leaf spring motor is also the same. As a result, the holders used in the prior art, scanners, and hand soldering or sockets are not used. Basically, the laser device is a standard package side-emitting laser device. To reduce cost, the focusing function of the laser device will not be adjustable, and the laser device will be mounted in such a way that its mounting flange contacts a shoulder that is molded integrally with the molding member. As shown in Figure 2, the laser device 2〇8 has an electrical conductor extending downwardly? And the wires are directly mounted in the PCB 226. This eliminates the need for manual soldering, but can be soldered if needed. When she does it, if the mirror is driven at a speed greater than 1 scan per second, -18- χ 261207 5. Description of the invention (14 i 适 吏 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不 不There is no counterweight inside.) Right-use _ unbalanced mirror, because the attachment point of the mirror for attaching the elastic yellow is not the centroid of the mirror assembly, when the mirror is stationary, gravity will be the total of the mirror. One of the larger masses in the middle ^ is relatively large force 'to make the mirror heavier on one side of the mirror, so the elastic force of the Radan force. Of course, the effect of the force depends on the scanner relative to gravity. It depends on the direction. However, if the scanning speed of the mirror is slow, the same "sagging" phenomenon will occur. Therefore, in this kind of application towel, it is better to use a uniform mirror. However, a balanced mirror Additional mass must be added to the mirror or reflection, which is a disadvantage for the design weight and power requirements during operation. In the specific example of high speed operation (ie, scanning more than 100 times per second), We can carefully select the material composition and size of the spring. Shape, thickness, and 俾 generate: the resonant frequency. For example, if the working speed is about 0.004 lbs per second, the Mylar magazine is a suitable choice. If the working speed is 4 sec per second. Secondly, it is best to use a thickness of about 3 steel springs. / If you use a traditional monolithic lens design, the intensity of the reflected light 仏 in the self-scanning line will be much greater than the edge of the self-scanning line. The intensity of one lens embodiment of the present invention is to use a lens array. The lens array can have two lenses: the individual lenses in the array can gather signals from specific parts of the scan line, and the fields of the lenses ( FOV) can overlap each other. We can optimize the size and direction of each lens to provide the required signal uniformity along the scan line. 1261207, invention description (=Show) Each lens in the train can have Connected to - amplifier. We can adjust the gain of each amplifier, '/ 知知 ^ field line signal uniformity is optimized. The: lens F 〇 V does not overlap 'we can combine from these lens line two Two hunting: two surrounding wide And improve the whole system to block the surrounding light ^ example, in the case of FOVA and F0VC do not overlap each other: the surrounding light in the = v is roughly hooked, if the signal is subtracted to light, but does not weaken the laser beam A useful signal, which occurs in the two F〇v. The photodiode signal is subtracted: 蚪 is completed, the method uses a suitable circuit to reverse the signal. The mode is defined as SIGNAL= ! A_c...B 'to reduce the distribution of ambient light. How the signal uniformity varies with the scan angle, the performance of the bar code reader is: reliable - the key. The amount of signal collected by the light collecting component will follow Significant changes occur in the scan angle. Basically, the signal will vary with the fourth power of the beam's angle of the tangent function. This change in signal will limit the performance of the scanner, or use complex electronic components. This phenomenon can be complemented. Basically, the signal strength from the middle of the scan line is much greater than the signal intensity produced by the light collected from the edge. A specific example of an optical component design can equalize the strong signal from the middle of the scan line (coaxial) to a signal intensity similar to that from the edge of the scan line (off-axis), thereby improving signal uniformity. A lens design suitable for a light collecting element assembly is shown in Fig. 4 and 5'®. The light from the middle of the scan line is incident at an angle of inclination to the second surface of the lens as shown in the "Coaxial Light". The surface can be totally internally reflected

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(TIR) reflects the light to the other portion of the second surface, and then performs a second total internal reflection from the second surface to eject it. Some of the rays are not totally internally reflected and thus pass through the surface, as shown by the "off-axis light" in the detector. However, as far as its net effect is concerned, the number of rays that can reach the detector has been reduced, resulting in a weak signal. If the angle of incidence of the light on the surface is less than the critical angle (see "Off-axis rays from the edge of the scan line"), the light can pass through the surface without total internal reflection and reach the detector. In another embodiment, the present invention provides a sensor that detects reflected light and produces an electrical signal corresponding to the symbol. The sensor includes first and second portions that are activated by the user and separated from each other, and are receivable from the first and second portions of the target (corresponding to the position of the focused beam on the target) reflected light. In a specific example, the sensor is vertically disposed such that the return light from the upper end portion of the target is directed to the first portion of the sensor, and the return light from the target = 4 knives is directed to the sensor. Two parts. This specific example is particularly suitable for scanning a dichroic target, such as using a raster scanning beam. In another specific example, the sensor is horizontally disposed such that the return light from the right side of the target is directed toward the first portion of the sensor, and the return light from the left side of the target is directed toward The second part of the sensor. In this way, the intensity of the optical signal generated after the signal received from the edge of the scanning line is concentrated can be increased, and the signal received from the middle segment is weakened. The jaw-like method provides a light collecting element that causes the lens to gather from a particular direction to sweep &amp; the line of light is less, gathering from the other direction (eg scanning 1261207)

There are more rays on the edge of the line. Referring now to the second lens design shown in Figure 6, wherein the second surface of the lens: has - a free-form surface which, in a preferred embodiment, can be a sinusoidal waveform as illustrated. For the light traveling from the middle of the scanning line and along the optical axis of the collecting lens, the light power of the 1 brother is negative, so the lens will disperse the light and reduce the sensitivity of the detection 1. For the light from the end of the scanning line and incident on the light at a tilt angle, the optical power of the lens is positive. Therefore, the lens can collect more light and increase the light intensity on the detector. Should have been: 'The above characteristics, or a combination of two or more features, can also be applied to other types of scanners and bar code readers of different types. DETAILED DESCRIPTION OF THE INVENTION In the drawings and description herein, although a scanning module for an electro-optical scanner is used, the invention is not limited to the details shown herein. People can make changes and structural changes without leaving the hair: fine: and scope. In particular, we should have this knowledge: as described in this article: - The characteristics of specific examples may also be combined with other specific examples where appropriate. As for the combination, the readers familiar with the art know. The gist of the present invention can be fully displayed without further analysis of the above description, and others can be modified by applying existing knowledge, and the features of the present invention are not omitted (in view of the prior art, these features constitute a In the case of general invention = basic features of a particular aspect, a variety of applications are made. Therefore, the method of reforming the temple should be included in (and also included in) the following patents: the meaning and scope of the patent. The subject matter claimed herein is novel and is intended to be protected by a certificate of rights as described in the appended claims.

X 297 mm) A7 B7 1261207 V. Description of the invention (18) Component symbol table 200 Module 215 Beam folding mirror 201 Frame or assembly 216 Scanning path 202 Front wall surface 217 Light collecting lens 203 Side wall 218 Light collecting lens 204 Side wall 219 movable mirror assembly 205 frame wall 220 drive coil / solenoid 206 laser beam 221 permanent magnet 207 printed circuit board (PCB) 222 light collecting component 208 laser diode assembly / laser device 224a light detection 209 light beam 224b light detector 210 opening 225a light detector 211 scanning mirror / optical element 225b light detector 212 path 226 printed circuit board (PCB) 213 beam folding mirror 227 electrical wire 214 path 228 bar code symbol /Target -23- This paper scale applies to China National Standard (CNS) A4 specification (210 X 297 mm)

Claims (1)

AB c D 1261207, Shen Qing Patent Range 1 · A scanning module for an optoelectronic reading and marking system, comprising: a) a support member comprising a base on a first plane, a frame wall, Having an opening and located in a second plane that is raised above and parallel to the first plane, and a support wall on the rear side of the support member and above the frame wall; b) a light source mounted on the support member to generate a beam of light; c) a scanning mirror mounted on the support member, reciprocally movable to reflect the incident beam of the scanning mirror; d) being driven to be mounted on the support member to reciprocally move the scan a mirror for scanning an incident beam reflected by the reflective scanning mirror; and e) a pair of beam folding mirrors, one of the pair of mirrors being mounted on the two supporting walls, and the pair of mirrors a mirror is disposed away from a front side of the rear side, and the other mirror is configured to operate to reflect a light beam reflected by the scanning mirror through the opening of the frame wall to one of the mirrors, wherein one of the mirrors is used for Fuck The reflection is by a beam of light reflected from the outside of the frame and between the rear side and the front side of the support and toward the other mirror that reads the mark. 2. The module of claim 1, wherein the light source is a semiconductor laser mounted on a rear side of the support member between the frame wall and the base. 3. The module of claim 1, wherein the scanning mirror is a planar mirror mounted on a rear side of the support member between the frame wall and the base. 4. The module of claim 1 Wherein the driver comprises an electromagnetic coil mounted on a rear side of the support member between the frame wall and the base. -24- This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) 1261207 A8 B8 C8 D8 Patent application scope 5. The module plane mirror of the first item of the scope of the patent application. t and the mother-mirror system is - such as the model of the first paragraph of the patent scope of the application, Bessie, and further includes a pair of sensors to detect the side reflected by the signal, the town &lt; nine δ The Hai Temple sensor is mounted on the front side of the support between the frame wall and the base. The module of claim 6 is between the pair of sensors. For example, the module board of the first application of the patent scope. Such as the patent application, the scope of the sixth module... π kiss / 7vj life sub-package S to the light detector and a pair of chapters · read times, ; ^ 奵木九逯 mirror, and the mother a light detector There is a lens. 10. The module of claim </ RTI> wherein the support member has a substantially parallelepiped shape. 6. 8. 9. wherein the other mirror is mounted with the base as a print Each of the sensors in the package is -25-