JP4373492B2 - Multi-angle scanner - Google Patents

Description

  The present invention relates to a multi-angle scanner having a line CCD, and more particularly to a multi-angle scanner that can adjust a corresponding angle between a scanning surface of a subject and an optical axis of a reading optical system to a desired angle.

  A scanner device including a line CCD that optically reads a document placed on a contact glass (mounting table) is known (see, for example, Patent Document 1). Such a scanner device irradiates scanning light (exposure scanning) toward a document surface from a light source (fluorescent lamp or the like) provided on a reading head that moves below a contact glass, and reflects the reflected light to a reflecting mirror or lens. Via the line CCD, and is configured to output digital image data (to an image forming apparatus or the like).

  In such a scanner device, a contact glass for placing a document to be read is fixed horizontally on the upper part of the device body, while the read head is parallel to the contact glass while maintaining a predetermined distance. The optical axis of the reading optical system (scanner optical system) always corresponds to the perpendicular (orthogonal direction) to the document surface.

JP 2003-295335 A

  By the way, recently, advertising / promotional techniques have been widely used in which the appearance of products is reproduced more realistically in flyers, pamphlets, etc. at supermarkets and convenience stores, etc., and motivates customers to purchase. In such a case, a method of photographing a subject with a camera and printing the photographed image is often employed. However, such a method has a drawback in that it takes a lot of labor and time to create a flyer, a pamphlet, and the like, and the cost for advertisement / promotion becomes high. In view of this, a method of reproducing a subject quickly, realistically, inexpensively using a scanner device is conceivable.

  However, in the conventional scanner device, as described above, the optical axis of the reading optical system that reads the reflected light from the subject always corresponds to the direction perpendicular to the document surface. It is impossible to realistically reproduce subtle facial expressions such as the wood grain of wallpaper and paintings (oil paintings). Recently, there has been an increasing demand for inexpensive, responsive and reproducible reading means for digital archives at universities and the like. Such a reading means is required to have an excellent visual inspection function that can reproduce fine wrinkles and dirt on the surface that cannot be captured by normal scanning from directly above, without overlooking the attached foreign matter.

  In addition, the conventional scanner device in which the contact glass is horizontally arranged and fixed cannot be used for applications such as reading three-dimensional objects such as various industrial products and antiques. Therefore, for example, in order to accurately reproduce the surface roughness of the metal-worked surface, the flatness of the resin plate material, the fine expression on the surface of the antique, etc., the image is taken by the camera. However, the camera cannot reproduce the image in real time. In particular, the industry has long required a simple reading means that can be brought into the field where the surface condition of various intermediate products and parts can be accurately read in real time in quality control and inspection departments. It was.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a scanner device that can realistically reproduce the surface state of an uneven subject.

  The multi-angle scanner of the present invention includes a mounting base 7 fixed to the apparatus main body for mounting the subject 1, a light source 2 for irradiating the subject 1 placed on the mounting base 7 with scanning light, and And a read head 6 having a line CCD 5 for reading the reflected light reflected by the subject 1 and moving in the scanning direction with respect to the mounting table 7. The optical axis of the read optical system of the read head 6 is The posture of the read head 6 is configured to be adjustable so as to be adjusted to a desired corresponding angle with respect to the mounting table 7, and the reading head 6 is moved along the mounting table 7. Features.

  According to such a configuration, when the surface to be scanned of the subject 1 is uneven, the reading head 6 can be tilted to appropriately change the corresponding angle of the optical axis of the reading optical system with respect to the surface to be scanned of the subject 1. For example, it is possible to obtain an optimum reading direction (angle) with respect to the concavo-convex portion, and to output realistic image data that accurately captures the delicate expression of the subject 1.

  Further, since the mounting table 7 is fixed to the apparatus main body, the subject 1 can be read in a stable state on the mounting table 7, so that various objects other than the manuscript, such as thick books, paintings and structures, can be obtained. Furthermore, it is possible to read with good reproducibility in a state where an antique product, a three-dimensional object that is easily deformed, a flexible bag containing liquid, various industrial products, and the like are stably placed.

  In the multi-angle scanner of the present invention, the read head 6 is disposed between a pair of support frames 14 disposed on both sides of the apparatus main body, and arc-shaped guides 15 and 16 formed on the support frame 14. It may be configured such that the posture can be adjusted by being guided by the above.

  In the multi-angle scanner of the present invention, the reading head 6 moves over a pair of guide rails 19 and 19 which are fixedly arranged in parallel with the mounting table 7 at a predetermined interval. It may be configured to.

  In the multi-angle scanner according to the present invention, the CCD camera 31 for selecting the optimum posture of the reading head 6 is used so that a part of the reading area of the reading head 6 can be imaged. The optical axis of the reading optical system and the imaging optical path may be matched and attached to the reading head 6 integrally.

  In this way, an optimum angle of the reading head 6 can be selected by reproducing a part of the subject 1 in real time by the optically independent CCD camera 31 before the reading operation by the reading head 6. The scanning operation can be performed at an appropriate angle without the need for press scanning, and the scanning time can be greatly shortened. For a subject whose unevenness differs depending on the part, the CCD camera 31 may be moved to reproduce a suitable plurality of places, and these may be judged collectively and reflected in the reading operation.

  In the multi-angle scanner of the present invention, a plurality of the read heads 6 are provided, and each of the read heads 6 can change its posture independently, and the subject 1 placed on the mounting table 7 is described above. The same line may be read simultaneously.

  In this way, by reading the subject at different angles, it is possible to process the difference in the fine uneven state, so that if there is abnormal unevenness on the surface of the subject, it can be magnified and reproduced. Therefore, by reproducing this on the monitor screen, it is possible to accurately inspect in real time for wrinkles and dirt on the surface of industrial products and the like, attached fine foreign matters, and the like.

  Specifically, for example, when it is desired to detect wrinkles and foreign objects existing on a metal surface with an uneven pattern using a pair of read heads 61 and 62 that can change postures independently, By reading the same line at the same time with the read heads 61 and 62 and simultaneously processing the difference of different facial expressions, only the fine surface state having a shape characteristic different from the uneven pattern of the wrinkles and foreign matters is amplified. Can be reproduced. More specifically, one read head 61 is set to an inclination angle that matches the state of the uneven pattern on the metal surface, and the other read head 62 is adjusted to the state of wrinkles or foreign matter (the degree of possible unevenness). By setting the tilt angle and taking the difference between the image data output from both the read heads 61 and 62, if there is a wrinkle or a foreign object that is different from the ground pattern, it is significantly amplified than the ground pattern difference. Since it appears, it can be detected clearly.

  In the multi-angle scanner of the present invention, a driving unit 32 for changing the posture of the reading head 6 may be provided.

  In this way, the posture of the reading head 6 can be finely changed with good operability, and highly accurate repeatability (reproducibility by repeating the same angle) can be obtained. The same reading conditions (the posture of the reading head 6) can be set, and highly reliable image data processing is possible. For example, the surface roughness of a plurality of industrial products (for example, intermediate products and parts) can be classified by grade.

  In the multi-angle scanner of the present invention, the read head 6 may be connected to the driving means 32 via a ball screw mechanism 33.

  In this way, the driving force from the driving means 32 can be smoothly transmitted to the reading head 6 via the ball screw mechanism 33, and the posture of the reading head 6 can be finely changed with good operability. In addition, highly repeatable repeatability can be obtained.

  As described above, the multi-angle scanner according to the present invention fixes the mounting table to the apparatus main body, while the optical axis of the reading optical system can be adjusted to a desired corresponding angle with respect to the mounting table. The posture of the optical system can be adjusted, so that the subject can be stably placed on the mounting table, and the posture of the reading optical system with respect to the scanned surface of the subject can be changed by changing the posture of the reading head for an uneven subject. If the corresponding angle of the optical axis is set appropriately, a realistic reproduced image can be obtained. Therefore, for example, not only the wood grain and paintings (oil paintings) of wallpaper, but also solid objects such as antiques and various industrial products (intermediate products, parts, etc.) can be used as subjects. Can be output inexpensively and quickly.

It is a schematic diagram which shows the basic composition of this invention. It is a perspective view at the time of setting the tilting stage of the multi-angle scanner which concerns on Embodiment 1 of this invention horizontally. It is a perspective view at the time of setting the tilt stage to a tilt angle of 30 °. It is a side view of the state which has arrange | positioned the reading head of the multi-angle scanner which concerns on Embodiment 2 of this invention below the mounting base, and respond | corresponds perpendicularly | vertically. It is the same perspective view. It is a side view of the state which has arrange | positioned the reading head of the multi-angle scanner which concerns on Embodiment 2 of this invention above a mounting base, and respond | corresponds perpendicularly | vertically. It is the same perspective view. It is a side view of the state which has arrange | positioned the read head of the multi-angle scanner which concerns on Embodiment 2 of this invention below the mounting base, and respond | corresponded to 60 degrees. It is the same perspective view. It is a side view of the state which has arrange | positioned the read-head of the multi-angle scanner which concerns on Embodiment 2 of this invention above a mounting base, and respond | corresponds to 60 degrees. It is the same perspective view. It is a side view of the state which has arrange | positioned the reading head of the multi-angle scanner which concerns on Embodiment 3 of this invention under the mounting base, and respond | corresponded to 30 degrees. It is the same perspective view. It is a side view of the state which has arrange | positioned the reading head of the multi-angle scanner which concerns on Embodiment 3 of this invention above the mounting base, and respond | corresponded to 30 degrees. It is the same perspective view. The reproduction image when the inclination angle of the optical axis of the reading optical system with respect to the subject is set to + 2.5 ° is shown. The reproduction image when the inclination angle of the optical axis of the reading optical system is set to −2.5 ° is shown. The reproduction image when the inclination angle of the optical axis of the reading optical system is set to + 5 ° is shown. The reproduction image when the inclination angle of the optical axis of the reading optical system is set to −5 ° is shown. It is a side view of the state which inclined the read head of the multi-angle scanner which concerns on Embodiment 4 of this invention at 30 degrees with respect to the mounting base. It is a side view of the state which made the read head of the multi-angle scanner which concerns on Embodiment 4 of this invention respond | corresponds to 90 degrees with respect to the mounting base. It is a perspective view of the multi-angle scanner which concerns on Embodiment 5 of this invention. It is a side view which shows the internal structure of the multi-angle scanner. It is a perspective view of the multi-angle scanner which concerns on Embodiment 6 of this invention. It is explanatory drawing in the case of detecting a wrinkle from the difference of the read data.

Hereinafter, a multi-angle scanner according to the preferred embodiment of the present invention will be described in detail with reference to the drawings.
[Basic configuration]
For example, as shown in FIGS. 1A and 1B, the multi-angle scanner of the present invention includes a light source 2 that irradiates a subject 1 with scanning light, a reflection mirror 3 that reflects reflected light reflected by the subject 1, and When a reading head 6 having a line CCD 5 to be read through a lens 4 is provided, and the reading head 6 is fixed and the subject 1 is tilted, as shown in FIG. When the reading head 6 is tilted, as shown in FIG. 1B, the optical axes of the reading optical system of the reading head 6 with respect to the scanned surface 1a of the subject 1 are set to 6a ₀ (vertical) and 6a ₁ (plus Side), 6a ₂ (minus side) can be adjusted to a desired angle. However, the illustration shows three angles of 90 ° and ± 30 °.

According to such a configuration, the optical axis of the reading optical system may be set to 6a ₀ for the subject 1 such as a normal document, and the subject 1 or the head 6 for the uneven subject 1. Is tilted to appropriately change the optical axis of the reading optical system with respect to the scanned surface 1a of the subject 1 to the plus side (6a ₁ ) or the minus side (6a ₂ ), so that the optimum reading direction for the uneven portion is obtained. By selecting (Angle), it is possible to output realistic image data that accurately captures a delicate expression of the subject 1. In the following, an embodiment of a multi-angle scanner having such features will be described.

[Embodiment 1]
This embodiment is shown in FIG. 2 and FIG. As shown in these drawings, the multi-angle scanner includes a tilting stage 8 that supports a mounting table 7 made of contact glass or the like on which a subject (not shown) is mounted while fixing the reading head 6 to the upper part of the apparatus main body. The reading head 6 includes a light source 2 for irradiating scanning light onto a subject placed on the placing table 7, and a line for reading reflected light reflected by the subject through a light receiving optical system such as a lens and a reflecting mirror. A CCD (contained in the housing 9) and the like are provided.

  The tilt stage 8 is supported between a pair of support plates 10 and 10 erected on both lower sides of the apparatus main body so as to be tiltable and fixed at a tilt angle, for example, from the horizontal (0 °) state shown in FIG. Can be fixed at a desired inclination angle within a range of 30 ° downward as shown in FIG. On the upper surface of the tilting stage 8, a pair of guide rails 81, 81 are provided in a direction orthogonal to the direction of the optical axis of the reading optical system of the reading head 6, and the mounting table 7 is moved to both the guide rails 81, 81. It is mounted freely.

  A conveyor belt 83 that is rolled by a pulse motor 82 is stretched between the guide rails 81, 81, and a mounting table 7 that is linked to the conveyor belt 83 is moved along the guide rails 81, 81 in a predetermined manner. While moving at a speed, the subject is read by the reading head 6, and the read image data is output as digital data to an image forming apparatus or the like.

  The support mechanism for the tilting stage 8 is configured to pivotally support the pivot shafts provided on both sides of the tilting stage 8 on the bearings provided on the support plates 10 and 10, and to change the tilting angle of the tilting stage 8. A display panel or the like for confirmation is attached to the support plates 10 and 10 or the vicinity thereof, and the tilting stage 8 is attached to the support plates 10 and 10 or the apparatus main body at a desired tilt angle by fastening members such as bolts and nuts. What is necessary is just to comprise so that it can fix. Further, the support shaft of the tilting stage 8 may be linked to the motor via transmission means such as a belt or gear so that the angle can be automatically adjusted via the control means.

  As shown in FIG. 2, in the state where the tilting stage 8 is set horizontally, the optical axis of the reading optical system of the reading head 6 corresponds to the vertical (orthogonal direction) to the subject. Even if there are fine irregularities such as fiber streaks, the reflected light from the printing surface can be read mainly with good reproducibility without much detection of these. Therefore, it is suitable for reading a planar image such as a normal document.

  FIG. 3 shows a tilt limit state in which the tilt stage 8 is set downward by 30 °. The inclination angle at which the best reproducibility can be obtained for the subject differs depending on the surface state. Therefore, by appropriately setting the inclination angle, it is possible to flexibly deal with subjects having different surface states. Therefore, it is possible to capture fine joints, wrinkles, patterns, etc. on the surface that cannot be read by scanning from directly above. It can be obtained inexpensively. The tilt stage 8 is not limited to a tilt angle limit of 30 ° downward. For example, the tilt stage 8 can tilt both upward (plus side) and downward (minus side) with respect to the horizontal, and the tilt angle can be fixed. You may comprise.

[Embodiment 2]
This embodiment is shown in FIGS. As shown in these drawings, the mounting table 7 is fixed horizontally to the apparatus main body, and the optical axis of the reading optical system is at a desired corresponding angle including at least perpendicular to the mounting table (or document surface) 7. The posture of the read head 6 can be changed so as to be adjustable. 4 to 7 show a state in which the optical axis of the reading optical system is set to a normal (right angle) with respect to the mounting table 7, and FIGS. 8 to 11 show the optical axis of the reading optical system with respect to the mounting table 7. The state set to 60 ° is shown. 4, 5, 6, and 9 show a state in which the reading head 6 is disposed below the mounting table 7, and FIGS. 6, 7, 8, and 11 show the mounting table 7 or a subject (not shown). The state in which the read head 6 is arranged on the upper side of FIG.

  The reading head 6 reads the reflected light received by the optical head 11, the light source 2 that directly irradiates the subject with scanning light through the mounting table 7, the reflected light reflected by the subject, and the optical head 11. A line CCD 5 for outputting digital image data, an inverter board 12 and the like are provided. A pair of adjustment knobs 13 for changing the posture of the read head 6 are provided between the read head 6 and the support frame 14 (see FIG. 11), and arc-shaped formed on both sides of the support frame 14. The posture of the read head 6 can be fixed by fastening the fixing knobs 17 and 18 that fit into the guide grooves 15 and 16.

  The reading head 6 reciprocates over a pair of guide rails 19, 19 that are fixedly arranged in parallel with a predetermined interval between the reading head 6. A roller 20 rotatably supported on one side of the support frame 19 is mounted on one guide rail 19 so as to be rotatable, and the other guide rail 19 is mounted on the other side of the support frame 14. The fixed guide block 21 is slidably fitted freely.

  One end of the read head 6 in the direction orthogonal to the moving direction is pivotally supported by the support frame 14, and the other end is supported by the support frame 14 via height adjustment members 22, 22 having adjustment knobs 13, 13. (See FIG. 11). The height adjustment member 22 includes a bolt member 22a and a nut member 22b that are screwed together, and the tip portions of the bolt member 22a and the nut member 22b are pivotally attached to the support frame 14 and the read head 6, respectively, and the nut member 22b. An adjustment knob 13 is attached to the.

  With such a configuration, the inclination angle of the reading optical system with respect to the mounting table 7 or the surface to be scanned of the subject can be adjusted in the range of 90 ° ± 30 ° on both the upper and lower sides of the mounting table 7. For example, when changing the tilt angle from 60 ° (or 120 °) from the state in which the tilt angle of the reading optical system is set to 90 ° as shown in FIGS. The knobs 17 and 18 are loosened, and the fastening state of the support frame 14 and the read head 6 is released. Next, by operating the adjustment knobs 13 and 13 to tilt the read head 6 to 60 ° (or 120 °), the fixed knobs 17 and 18 may be fastened.

  In this way, the tilt angle of the reading optical system can be adjusted, and in order to change the upper and lower correspondence between the reading head 6 and the mounting table 7, for example, the apparatus main body may be inverted 180 °. Alternatively, the read head 6 and the guide rails 19 and 19 may be supported together with the mounting table 7 so as to be rotatable at least at 0 ° and 180 ° with respect to the apparatus main body and to be fixed at both angles.

  As shown in FIGS. 4 to 7, if the angle of the reading head 6 is adjusted so that the optical axis of the reading optical system of the reading head 6 is perpendicular to the mounting table 7, a plan view of a normal document or the like can be obtained. Can be read with good reproducibility. That is, in this state, even if there are fine irregularities such as fiber streaks on the background of the paper other than the printing surface, the reflected light from the printing surface can be read mainly with good reproducibility without much detection of these. .

  On the other hand, for an uneven subject, as shown in FIGS. 8 to 11, the reading head 6 is inclined so that the corresponding angle of the optical axis of the reading optical system of the reading head 6 with respect to the scanned surface of the subject is appropriate. If it is changed to, an optimum reading direction (angle) with respect to the concavo-convex portion can be obtained. This makes it possible to output realistic image data that accurately captures a delicate expression of the subject.

  Further, since the mounting table 7 is fixed to the apparatus main body, the subject can be fixed to the mounting table 7 in a stable state. Therefore, various objects other than the original, such as thick books, paintings and structures, easily deformable objects, A flexible bag containing liquid can be read with good reproducibility.

  As shown in FIGS. 4, 5, 8, and 9, in the state where the reading head 6 is arranged on the lower side of the mounting table 7, the subject may be placed on the mounting table 7 and scanned. In the states shown in FIGS. 7, 10, and 11, the subject may be placed on the mounting table 7 and the subject may be scanned directly. Thus, for a digital archive or the like intended for oil paintings, it is preferable to scan the subject directly without using the mounting table 7.

  As described above, since the tilt angle at which the best reproducibility can be obtained for each subject varies depending on the surface condition, such a multi-angle scanner with adjustable tilt angle of the reading optical system has different surface conditions. It is possible to deal flexibly with the subject. For example, in the case of a subject in which a wooden plate is placed on a metal plate (aluminum flat plate), different reproducibility can be obtained as shown in FIGS. 16 to 19 by changing the tilt angle of the reading optical system.

  16 and 17 show a case where the inclination angle of the reading optical system with respect to the subject is changed to ± 2.5 °. When tilted to −2.5 ° (see FIG. 16), the reproducibility is not good, but when tilted to + 2.5 ° (see FIG. 17), the machined surface of the metal plate It can be seen that the state of and the wood grain state of the wood board are reproduced realistically. Further, in FIGS. 18 and 19 showing the case where the inclination angle is changed to ± 5.0 °, the surface state of the metal plate and the wood board material is shown when it is inclined to −5.0 ° (see FIG. 18). Although the difference is not clear, it can be seen that the state of the machined surface of the metal plate is more realistically reproduced when it is inclined to + 5.0 ° (see FIG. 19). Note that these are only examples of reference, and it is needless to say that an inclination angle that provides optimum reproducibility can be selected depending on the surface condition of the subject.

[Embodiment 3]
This embodiment is shown in FIGS. This example is different from the previous embodiment in that the inclination angle of the reading optical system with respect to the mounting table 7 can be adjusted in the range of 25 ° to 35 ° (only for inclination). Further, the point that the light source 2 is supported on the support frame 14 so that the position of the light source 2 can be adjusted in the vertical and horizontal directions and the adjustment knobs 13 and 13 are provided on the back surface of the read head 6 are the same as those in the previous embodiment. Different. In addition, the same code | symbol is attached | subjected about the same member as previous embodiment, or an equivalent member, and description is abbreviate | omitted.

  The support structure of the light source 2 will be described. Support members 25 and 26 for supporting the light source 2 are attached to both sides of the support frame 14, and the base of one of the support members 25 is fixed to the support frame 14 by bolts. A fixing knob 27 that is screwed into a screw hole of the other support member 26 is loosely fitted into the long hole 25a formed at the tip thereof, and the long hole 26a formed in the other support member 26 is inserted into the long hole 26a. A fixing knob 29 that is screwed into a screw hole of a support member 28 that supports both sides is loosely fitted so as to be fastened. Reference numeral 30 denotes a fixing knob for detachably fixing the light source 2. Further, the adjustment knob 13 provided on the back surface of the read head 6 is connected to a height adjustment member (see FIG. 11) as in the previous embodiment.

  As described above, the position of the light source 2 with respect to the subject can be adjusted in order to appropriately match the exposure optical system and the reading optical system according to the state of the surface to be scanned. Incidentally, in the prior art, for example, there has been an idea to improve reproducibility by adjusting only the position of the light source 2 with respect to a subject having an uneven surface to be scanned such as an oil painting. In some cases, sufficient reproducibility could not be obtained only by adjusting.

  In the present embodiment, in view of such a situation, by appropriately matching the exposure optical system and the reading optical system for an uneven subject such as an oil painting, it is possible to more appropriately cope with it, Realistic image data that accurately captures the delicate expression of the subject can be output. In this embodiment, the support frame 14 and the like are configured exclusively for tilting. However, as in the previous embodiment, the reading optical system can also be adapted to be perpendicular to the surface to be scanned of the subject. Needless to say, the configuration may be as follows.

[Embodiment 4]
This embodiment is shown in FIG. 20 and FIG. In this example, the read head 6 is configured to be guided by arc-shaped R guides 34 and 34 provided inside both side walls of the support frame 14 so that its posture can be continuously changed, and A CCD camera 31 for selecting an optimum posture of the read head 6 is integrally attached to the read head 6. That is, a part of the reading area of the reading head 6 is attached so that the imaging optical path of the CCD camera 31 coincides with the optical axis of the reading optical system of the reading head 6 so that an optically independent CCD camera 31 can pick up an image. ing. 20 shows a state in which the optical axis of the reading optical system is inclined by 30 ° with respect to the mounting table (not shown), and FIG. 21 shows that the optical axis of the reading optical system is 90 ° with respect to the mounting table (not shown). The state corresponding to is shown.

  A guide rail 35 is provided on the upper side wall of one side of the support frame 14 that supports the read head 6, and a fastening member 36 for fixing the read head 6 is movably straddled on the guide rail 35 and fastened. A fixing knob 38 that is screwed into the side wall of the read head 6 is loosely fitted in a long hole 37 formed in the upper portion of the member 36 so that it can be fastened, and a position fixing handle 39 is provided at the base of the fastening member 36. It is attached so that it can be fastened. With such a configuration, by fastening the fixed knob 38 and the handle 39, the read head 6 can be moved to an arbitrary position from a state corresponding to 90 ° with respect to the mounting table (not shown) to 30 ° before and after that. (Posture) can be fixed.

  In addition, angle adjustment knobs 42 and 43 for adjusting the irradiation angle of the light sources 2 and 2 can be fastened to the arcuate guide grooves 40 and 41 formed in the plate member attached to the lower part of the guide block 21. It is loosely fitted. With such a configuration, it is possible to set an appropriate irradiation angle of the light sources 2 and 2 with respect to the mounting table (not shown). Since the tilt angle of the read head 6 (and the CCD camera 31) and the irradiation angle of the light sources 2 and 2 can be changed independently, the tilt angle of the read head 6 (and the CCD camera 31) is kept constant. The irradiation angle of the light sources 2 and 2 may be changed, or the inclination angle of the reading head 6 (and the CCD camera 31) may be changed while the irradiation angles of the light sources 2 and 2 are kept constant. The optimum setting state can be grasped by reproducing them with the CCD camera 31 while appropriately changing them according to the state.

  According to the configuration as described above, before the reading operation by the reading head 6, the inclination angle of the reading head 6 and the irradiation angles of the light sources 2 and 2 are changed, and the object is detected by the optically independent CCD camera 31. By reproducing the portion in real time, the tilt angle of the read head 6 and the irradiation angles of the light sources 2 and 2 can be set to optimum values. Accordingly, it is possible to perform a reading operation in an optimal state without requiring press scanning, and it is possible to greatly shorten the scanning time. Further, for a subject whose unevenness differs depending on the part, the CCD camera 31 may be moved to reproduce a suitable plurality of places, and these may be collectively judged and reflected in the reading operation.

[Embodiment 5]
This embodiment is shown in FIG. 22 and FIG. In this example, the read head 6 is transmission-coupled to the drive means 32 via the ball screw mechanism 33. That is, the output shaft of the motor (driving means) 32 is connected to the screw shaft 33 a of the ball screw mechanism 33, while the nut 33 b is connected to the read head 6 via the connecting member 51. Also in this embodiment, the read head 6 is guided by the guide rails (19) and (19) and moves on the mounting table (7) as in the previous embodiment. Shows only the read head 6 and the support frame 14, and the others are not shown.

  The ball screw mechanism 33 is provided on the inner side upper part of the support frame 14 formed in a rectangular frame shape, and the motor 32 is fixed to the outer side of the support frame 14. The read head 6 is configured to be guided by arc-shaped R guides 34, 34 provided inside the both side walls of the support frame 14 so that the posture thereof can be continuously changed, and as described above, the connecting member 51. Is connected to the nut 33b of the ball screw mechanism 33. As shown in FIG. 23, the connecting member 51 has a guide groove 51a formed in the shape of a long hole in the vertical direction, and the guide groove 51a protrudes from side plates 6p provided at both ends of the read head 6. The slider 52 is configured to be loosely fitted. In this case, the irradiation angle of the light sources 2 and 2 to the mounting table (not shown) changes in conjunction with the change in the angle of the read head 6. Further, guide plates 44 and 45 for stabilizing the operation of the light sources 2 and 2 are attached to the reflecting plates 2a and 2a of the light sources 2 and 2, and arc-shaped guides formed on the guide plates 44 and 45 are attached. Fixing pins 46 and 47 projecting from the side wall of the support frame 14 are loosely fitted into the grooves 44a and 45a.

  According to the configuration described above, the posture of the read head 6 can be finely changed with good operability, and the irradiation angle of the light sources 2 and 2 can be appropriately changed. (Reproducible by repeating the same angle). Therefore, since the same reading condition (the posture of the reading head 6) can be set for a plurality of subjects, it is possible to perform continuous processing of highly reliable image reproduction data. For example, the surface roughness of a plurality of industrial products (for example, intermediate products and parts) can be classified by grade. It is also possible to discriminate between those with and without wrinkles on the surface.

[Embodiment 6]
This embodiment is shown in FIG. In this example, a pair of reading heads 61 and 62 whose postures can be independently changed are used to simultaneously read the same line Q of a subject placed on a placement table (not shown). is doing. That is, the optical axis 61a of the read head 61 and the optical axis 62a of the read head 62 can be set on the same line Q of the subject (not shown). In this case, the head main body 6A in which the two reading heads 61 and 62 are housed in the housing is set in a horizontal state.

  Adjusting knobs 131 and 132, which are slidably fitted with sliding members 53 and 54 fixed to the side walls on both inner side walls of the head main body 6A, and screwed so as to be fastened to the side walls of the read heads 61 and 62, are provided. These are loosely fitted into arc-shaped guide grooves 131a and 132a formed on the side plate of the head main body 6A. With such a configuration, the pair of read heads 61 and 62 can be fixed in arbitrary postures by fastening the adjustment knobs 131 and 132, respectively.

  According to the above configuration, when it is desired to detect wrinkles and foreign objects existing on a metal surface with an uneven pattern, the two read heads 61 and 62 simultaneously capture the same line and simultaneously detect the difference in different facial expressions. By processing, it is possible to amplify and reproduce only a fine surface state having a shape characteristic different from the uneven pattern of the wrinkles and foreign matters. More specifically, one read head 61 is set to an inclination angle that matches the state of the uneven pattern on the metal surface, and the other read head 62 is adjusted to the state of wrinkles or foreign matter (the degree of possible unevenness). For example, as shown in FIG. 25, if there is a crease or a foreign object different from the ground pattern, the ground pattern is obtained by setting the inclined angle and taking the difference between the image data output from both the read heads 61 and 62. (See the arrow P), this can be clearly detected.

  In this way, by reading the subject at different angles, it is possible to output a difference in the state of fine unevenness, so that if there is abnormal unevenness on the surface of the subject, it can be magnified and reproduced. . Therefore, by reproducing this on the monitor screen, it is possible to accurately inspect in real time for wrinkles and dirt on the surface of industrial products and the like, attached fine foreign matters, and the like. By the way, by setting the head main body 6A in the horizontal state, for example, a long plate cylinder used for offset printing or the like can be horizontally placed and the surface state can be inspected. In that case, the plate cylinder may be fixed and the head main body 6A may be moved laterally in a horizontal state, or the head main body 6A may be fixed and the plate cylinder moved laterally. Needless to say, the object is not limited to use in the horizontal position but may be read by placing the subject directly below the head body 6A in the vertical position.

  The present invention is not limited to the embodiments described above, and design changes and improvements can be made as appropriate without departing from the gist of the invention, and combinations between the embodiments are also possible. Be free.

  DESCRIPTION OF SYMBOLS 1 ... Subject, 2 ... Light source, 5 ... Line CCD, 6 ... Reading head, 7 ... Mounting table, 8 ... Tilt stage, 31 ... CCD camera, 32 ... Driving means, 33 ... Ball screw mechanism

Claims (3)

A mounting table (7) fixed to the apparatus main body for mounting the subject (1);
A light source (2) for irradiating the subject (1) placed on the table (7) with scanning light, and a line CCD (5) for reading the reflected light reflected by the subject (1); A read head (6) moved in the scanning direction with respect to the mounting table (7),
The posture of the read head (6) is adjustable so that the optical axis of the read optical system of the read head (6) can be adjusted to a desired corresponding angle with respect to the mounting table (7), A multi-angle scanner, wherein the read head (6) is moved along the mounting table (7).   The read head (6) is disposed between a pair of support frames (14) disposed on both sides of the apparatus main body, and arc-shaped guides (15) and (16) formed on the support frame (14). The multi-angle scanner according to claim 1, wherein the multi-angle scanner is configured to be adjustable in posture by being guided.   The read head (6) moves so as to straddle a pair of guide rails (19), (19) fixedly arranged in parallel with the mounting table (7) at a predetermined interval. The multi-angle scanner according to claim 1, wherein the multi-angle scanner is configured.

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