JP2007205890A - Apparatus and method for inspecting optical variable device foil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection apparatus and an inspection method for inspecting whether an Optical Variable Device (OVD) foil has been reliably stamped when the OVD is formed in a substrate. <P>SOLUTION: The OVD foil inspection apparatus is provided with: a light source part for irradiating light to a rewound foil acquired by rewinding a carrier film after the OVD foil is stamped; a trigger part for indicating the timing of capturing optical information acquired on the basis of transmitted light by the irradiation from the light source part; an information collection part for capturing the optical information and transmitting the captured optical information to a post-process; and an information analysis part for comparing a measurement value acquired by analyzing the optical information as an image with a previously stored reference value of an image of a normal rewound foil and determining the quality of an object to be inspected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inspection apparatus and an inspection method for inspecting whether OVD is reliably foil-pressed and controlling foil pressing position when OVD is formed on a substrate.

  In recent years, a display technology (hereinafter referred to as “OVD (Optical Variable Device)” which uses light interference such as a multilayer thin film that changes color depending on the viewing angle by stacking thin films with different optical characteristics such as holograms and diffraction gratings. ) ", And the foil with OVD attached is called" OVD foil ".) Has an excellent decorative effect because it produces a unique image and color change depending on the viewing angle due to light diffraction and interference. As an effective anti-counterfeiting technology, it is widely used for securities such as cards, cash vouchers and banknotes.

  OVD is foil-stamped on a base material such as paper by a foil stamping machine. Conventionally, it has been only an inspection by human eyes whether or not the foil is normally pressed. For this reason, it is difficult to make the inspection accuracy uniform and to carry out 100% inspection, and automation of the inspection process by a machine has been demanded.

The OVD foil is roughly divided into two types: an OVD that is foil-pressed on a substrate such as paper and a carrier film that transports the OVD to the foil-pressing position. In addition, since only the carrier film remains and is wound up and collected after pressing the foil, it is particularly referred to as re-rolled foil in this specification.

  As an automated technique for the inspection process, light is applied to the re-rolled foil on which the carrier film has been wound up again, captured by the camera, and the area of the part that is pressed off and removed (hereinafter referred to as “foil removal”) is measured. There is a foil pressing inspection method and apparatus (for example, refer to Patent Document 1) that determines whether or not the area is a value within a predetermined range and inspects whether or not the foil pressing has been performed. OVD foil on which the entire surface of the foil is deposited (hereinafter referred to as “entirely deposited foil”) is a metal plate (hereinafter referred to as “engraved”) that applies pressure and heat to the OVD when pressed. ) Is effective because the foil falls off.

  Although the entire surface-deposited foil in which the entire foil is vapor-deposited has been described above, in order to express complicated shapes and minute characters with the entire surface-deposited foil, it is also necessary to make the stamped shape complicated. Therefore, there is an OVD foil (hereinafter referred to as “partial vapor deposition foil”) that can be stamped with a simple shape (such as a circle or a quadrangle) by performing metal vapor deposition only on a portion to be foil stamped on a base material.

  There is a foil pusher (for example, refer to Patent Document 2) that can inspect the partially evaporated foil, and this is an inspection method using an optical sensor. In this case, an optical sensor of a spot type (spotted light from the sensor) is used, and in order to inspect the deposited portion remaining on the OVD foil (hereinafter referred to as “foil remaining”), the partially deposited foil is used. Detection is also possible.

JP 2002-39729 A JP 2004-35014 A

  Since the part of the partially evaporated foil that has not been pressed is removed in advance, nothing remains on the re-wrapped foil when the evaporated part is transferred to the substrate by pressing the foil. As a result, the foil appears as if it has fallen out, and the light emitted from the light source is transmitted regardless of the shape of the foil, so it cannot be confirmed whether the foil has been pressed reliably.

  In Patent Document 1, there is a camera that captures the remaining foil to which light is applied, but there is no description of the trigger unit that instructs the imaging timing, and it is considered that high inspection accuracy that can inspect the partially evaporated foil is not expected. .

  With respect to Patent Document 2, light that is used to detect an object is irradiated from a fixed detection unit, and the foil that passes through the irradiation range is inspected. Therefore, only the minimum irradiation width (in this case, the spot diameter) is used. It cannot be detected and the entire vapor deposition part cannot be inspected. In addition, sensors are installed before and after the foil pressing to inspect the OVD foil to check the foil pressing state. However, as the number of inspection processes increases, the apparatus becomes complicated and an installation space corresponding to that is required.

  Since the stamping position attached to the foil stamping machine with respect to the foil stamping position control is fixed, the contact position of the stamping with the sheet changes if there is a paper conveyance failure during the foil stamping. At the same time, the contact position of the OVD foil with respect to the engraving also changes due to poor conveyance of the foil (OVD foil and re-rolled foil) (hereinafter, conveyance failure refers to defective conveyance of the foil).

  Partially vapor-deposited foil that is designed so that the vapor-deposited part fits within the stamp when the foil is pressed at the proper position will change the foil transport position when a conveyance failure occurs. It will be stamped.

  A method of directly inspecting the OVD of the stamped substrate can be considered as a method for inspecting the conveyance failure. However, since the inspection accuracy depends on the surface condition of the substrate, if the paper has waviness or waviness, High accuracy and uniform inspection on the top becomes difficult.

  By transferring the inspection process to a post-process, the responsiveness to find a defect related to foil pressing deteriorates, and the number of inspection items may increase. Therefore, the structure of the inspection apparatus becomes more complicated.

Furthermore, when pressing a plain metal foil with no pattern drawn on the entire surface of the foil, there is no problem if it is checked whether the foil is properly removed, but the pattern is drawn on the partially evaporated foil or the evaporated surface. If there is, there is a possibility that the pattern or the vapor deposition part may be lost due to a conveyance failure, so it is necessary to inspect the foil pressing position.

  Therefore, the present invention detects the remaining foil in the post-process of the foil stamping unit in the foil stamping machine, that is, the rewinding foil transporting unit, regardless of the entire surface vapor deposition foil or the partial vapor deposition foil, and inspects whether the OVD is reliably foil stamped on the base material. An apparatus and method are provided.

  At the same time, a mark for detecting the foil pressing position (hereinafter referred to as “register mark”) serves as an inspection trigger, and all the foils are imaged at the same timing. The present invention provides an apparatus and a method for inspecting and controlling whether or not a foil has been pressed at various positions.

In order to solve the above problems, the present invention provides the following OVD foil inspection apparatus.
It is an inspection device that inspects whether the OVD has been foil-foiled reliably by detecting the remaining foil of the re-rolled foil that has been rolled up with the carrier film after foil-foiling the OVD. A light source unit, a trigger unit for instructing timing for capturing optical information obtained from transmitted light by irradiation from the light source unit, an information collecting unit for capturing optical information and transmitting the captured optical information to a subsequent process, and optical information It is characterized by comprising an information analysis unit that compares the measured value analyzed as an image with the reference value of the normal re-rolled foil image stored in advance to determine the quality of the inspection object.

  In addition, the information analysis unit of the OVD foil inspection apparatus of the present invention stores the inspection conditions when performing a comparative inspection between the measured value obtained by analyzing the optical information as an image and the reference value of the regular re-rolled foil image stored in advance. A binarization process and an edge-to-edge measurement for an image obtained from the optical information transmitted from the information collecting unit, and store the binarization process result, the edge-to-edge measurement value, and the comparison inspection result A calculation unit that feeds back to the unit, a counting unit that counts OVD by a signal from the trigger unit, a measurement value obtained by analyzing the optical information of the calculation unit as an image, and a reference value of a regular re-rolled foil image that is stored in advance And a control unit for controlling an instruction signal for comparison inspection and a signal for feeding back the comparison inspection result to the foil stamping machine.

  Moreover, the OVD foil inspection apparatus of the present invention includes an operation unit for setting inspection conditions in the arithmetic unit.

  Further, the OVD foil inspection apparatus of the present invention is obtained from the optical information transmitted from the information collecting unit, the measured value obtained by analyzing the optical information as an image, the reference value of the normal re-rolled foil image stored in advance, and the determining unit. The display part which displays the determination result obtained is provided.

  In addition, the OVD foil inspection apparatus of the present invention includes a measurement value obtained by analyzing a paper detection unit and / or optical information as an image, and discriminating between product paper and other paper (mechanical adjustment paper, etc.) and detecting whether paper passes. A data accumulation unit is provided for storing a reference value of a normal re-rolled foil image stored in advance, a counting result in the counting unit, and a determination result in the determining unit.

  In the OVD foil inspection apparatus of the present invention, the information analysis unit warns the operator when it is determined that the determination result obtained by inspecting whether the OVD is reliably pressed on the sheet is defective. A part.

  In addition, the present invention is an OVD foil inspection method for inspecting whether OVD is reliably foil-pressed by detecting the remaining foil of the re-rolled foil obtained by rewinding the carrier film after foil pressing the OVD, Irradiate light to the rewinding foil, instruct the timing to capture the optical information obtained there, capture the optical information based on the timing, and analyze the optical information as an image and the regular rewinding stored in advance The reference value of the foil image is compared to determine whether the inspection object is good or bad.

  In addition, the present invention saves the inspection conditions when performing a comparative inspection between the measured value obtained by analyzing the optical information as an image and the reference value of the normal re-rolled foil image stored in advance, so that an image obtained from the optical information can be obtained. The binarization process and the measurement between edges are performed, the binarization process result, the inter-edge measurement value, and the comparison inspection result are fed back to the storage unit, the number of OVDs is counted, and the optical information is used as an image. Performs a comparison inspection between the analyzed measurement value and the reference value of the regular re-rolled foil image stored in advance, determines the quality from the comparison inspection result, and sends the instruction signal for the comparison inspection and the comparison inspection result to the foil stamping machine. This is an OVD foil inspection method for controlling a signal to be fed back.

  In addition, the present invention sets the inspection condition for feedback for the next inspection after the comparative inspection between the measured value obtained by analyzing the optical information as an image and the reference value of the normal re-rolled foil image stored in advance. It is an OVD foil inspection method that can be used.

  Further, the present invention is an OVD foil inspection method for displaying optical information, a measured value obtained by analyzing the optical information as an image, a reference value of a normal re-rolled foil image stored in advance, and a determination result.

  Further, the present invention provides a normal rewinding foil that is stored in advance as a measurement value obtained by discriminating between product paper and other paper (such as mechanical adjustment paper), detecting whether paper has passed, and / or analyzing optical information as an image. This is an OVD foil inspection method for storing image reference values, counting results, and determination results.

  In addition, the present invention is an OVD foil inspection method for notifying an operator when it is determined that the determination result obtained by inspecting whether the OVD is reliably foil-pressed on the sheet is defective.

  The OVD foil inspection apparatus of the present invention irradiates light on a re-rolled foil that has been rolled up by pressing the OVD, captures optical information obtained from the transmitted light by the information collecting unit, and presses the foil in the information analyzing unit for re-winding. Measure the area of the remaining part of the foil as a measured value, compare the measured value with the reference value stored as a regular re-rolled foil, determine the quality, and whether foil pressing has been performed reliably Can be inspected.

  By irradiating light to the re-rolled foil at the light source part and measuring the area of the portion where the transmitted light is shielded, it is possible to inspect not only the entire surface evaporated foil but also the partially evaporated foil.

The OVD is counted by detecting the register mark on the re-rolled foil, the remaining foil is inspected by a comparative inspection using a binarization process, and the distance between the foil drop and the re-rolled foil or the edge of the reference frame is measured at the foil pressing part. The foil pressing position can be inspected and if there is a defect, a feedback signal can be transmitted to the foil pressing machine to control the foil pressing position.
The binarization processing result, the measured value between edges, and the comparison inspection result are fed back to the inspection condition, and necessary information is stored to always maintain the optimal inspection condition.

  The presence / absence of a sheet to be passed through the foil stamping machine can be detected, and discrimination between the product sheet and other sheets (mechanical adjustment sheets) can be performed.

  Anything can be detected as long as it shields not only the remaining foil but also transmitted light such as dust and scratches on the surface of the rewind foil.

  The information analysis unit displays the number of OVDs passed by the trigger unit and the number of OVDs foil-pressed on the paper and the number of sheets pressed (foil-pressing times) by detecting whether or not the base material is passed by the paper detection unit. Can be counted.

FIG. 1 shows a schematic diagram of an OVD foil inspection apparatus according to the present invention, and FIG. 2 shows a detailed block diagram of the configuration. In addition, the said apparatus is one Example, It is not limited to this.
The OVD foil inspection apparatus according to the present invention includes a light source unit 3 that irradiates light to the rewind foil 1 to inspect the foil pressing state of the rewind foil 1 that is being transported in the transport direction 2, and the rewind foil 1. The obtained transmitted light 4, the register 6 of the rewind foil 1 is read and a trigger unit 6 for instructing the timing for imaging optical information, the information collecting unit 5 for imaging optical information by the signal of the trigger unit 6, and the captured image are analyzed The information analysis unit 7 determines whether the inspection object is good or bad by comparing the measured value with a reference value of a regular re-rolled foil image stored in advance.

  In the information analysis unit, the storage unit 7a for storing the inspection conditions, the binarization process and the edge-to-edge measurement, the calculation unit 7b for feeding back the comparison inspection result to the inspection conditions, and the foil pressing from the signals of the trigger unit 6 and the paper detection unit 8 Counting unit 7c that counts the number of sheets, the number of sheets, the number of OVD inspections, a determination unit 7d that determines whether OVD is normally foil-foiled from the comparison inspection result, an instruction signal for comparison inspection, and a feedback signal to the foil stamping machine It consists of the control part 7e which controls.

  It should be noted that a paper detection unit 8 that detects paper discrimination and paper passage, an operation unit 9 that sets inspection conditions, a display unit 10 that monitors captured images and comparative inspection results, reference values, measurement values, count results, and determination results The data collection unit 11 for storing the data and the warning unit 12 for notifying the worker of the occurrence of the defective foil can further improve the efficiency of the inspection work of the OVD foil.

  The light source unit 3 is an LED or halogen illumination, the information collection unit 5 is a CCD line sensor camera or area sensor camera, the trigger unit 6 and the paper detection unit 8 are optical sensors or rotary encoders, the operation unit 9 is a console, a display unit Reference numeral 10 denotes a monitor, a touch panel having both functions of operation and display, and the warning unit 12 can use a buzzer or a patrol light, but is not limited thereto.

Here, the mechanism of the foil stamping machine provided with the OVD inspection apparatus of the present invention will be described. In addition, a foil stamping machine is one Example, It is not limited to this.
The sheet 15 conveyed from the sheet feeding unit 13 by the gripper 21 and the OVD foil fed from the inspection foil unwinding unit 18 are conveyed to the foil pressing unit while being synchronized by a foil pressing machine, and are printed by the stamp plate 16 and the impression plate 17. The OVD is foil-foiled at a fixed position of the leaf paper 15, the sheet 15 is discharged to the paper discharge unit 14, and the OVD foil is in a state of only a carrier film, and is wound up again by the foil rewinding unit 19 as the rewind foil 1. It is done.

  In the case of such a foil stamper, the OVD foil inspection apparatus according to the present invention reads the light source unit 3 always irradiating light and the register mark to inspect the foil-pressed state of the rewind foil 1 and captures the optical information obtained from the transmitted light. The information collecting unit 5 that picks up optical information according to the instruction from the trigger unit 6 and the trigger unit 6 picks up the image from the foil unrolling unit to the rewinding foil transport unit after foil pressing until it is collected by the foil winding unit. Binarization processing for images and edge-to-edge measurement, counting based on signals from the trigger unit 6 and the paper detection unit 8, comparison inspection between the measured value and the reference value of the regular re-rolled foil image, and inspection relating to foil remaining and foil pressing position control It is desirable to install the information analysis unit 7 to be performed outside the foil stamping machine.

  Further, the paper detection unit 8 is set in the paper feeding unit 13 of the foil stamping machine in order to determine the sheet of the sheet 15 to be foil-foiled and count and determine the start of inspection according to the feeding state, and the operation unit 9 for setting the inspection conditions. A display unit 10 for displaying captured images, measurement values, reference values, and comparison inspection results, a data accumulation unit 11 for storing various data, and a warning unit 12 for notifying the operator of the occurrence of defective foil may be installed outside the foil stamping machine. desirable.

The flowchart of FIG. 4 shows the inspection process in this apparatus.
In the OVD foil, light is always irradiated to the re-rolled foil that has become only the carrier film after the foil pressing. Detects the register mark of the rewind foil being conveyed and images the optical information of the foil missing (assuming the pixel mark of the captured image is the coordinate based on the reading position of the register mark in order to detect the foil pressing position at this time) Then, the rectangle that passes through the branch points P1 (A1, B1), P2 (A2, B2), P3 (A3, B3) from the start point P0 (A0, B0) and reaches P0 is drawn on the captured image ( This is hereinafter referred to as “reference frame Z”). A binarized process is performed on the captured image, and it is compared with a reference value to determine whether or not foil pressing has been performed, and the remaining foil is inspected. At the same time, the foil pressing position control is performed. As shown in FIGS. 6 (d) and 7 (d), a reference frame Z for measuring the transport position is set with respect to the captured image. The edge distance X1 of the wound foil and the conveying direction are measured by removing the foil and the edge distance Y1 of the reference frame, and comparing the reference distances X0 and Y0 to inspect the foil pressing position. The foil pressing state is determined from the comparison inspection result, and if it is normal, the inspection returns to the inspection again. If it is defective, the foil pressing machine is stopped.

  Basically, 100% inspection is possible, but by performing paper passage and paper discrimination, the inspection object can be narrowed down to re-rolled foil that is pressed onto product paper, which is an efficient inspection. In addition, the function of counting the number of OVD and paper passing and inspection and foil pressing by combination with the trigger signal, the function of confirming the inspection status by displaying and storing the counting results and captured images, inspection conditions and judgment results, and there are abnormalities. The workability is improved by a warning function for notifying the operator of such a situation.

  After saving the necessary data, return to the inspection if the foil pressing is judged normal. When a defect is determined, the operator is notified of this, the machine is automatically stopped, and the operator samples the paper. However, if the conveyance failure is within the allowable range in the foil pressing position inspection, a normal determination is made, and the correction amount for returning to the reference position is fed back to the foil pressing machine to control the rewinding foil conveyance position.

  As described above, there are partial vapor deposition foils and full vapor deposition foils for OVD foils that are pressed onto paper, and the embodiments of each are shown below.

First, the partially evaporated foil will be described.
As shown in FIG. 5 (a), the partially vapor-deposited foil is composed of a pattern portion A on which a metal layer serving as a vapor deposition portion is vapor-deposited, a register mark B, and a carrier film D1 serving as a non-vapor deposition portion. When the foil is pressed in the case of an elliptical shape like this, the range of C is transferred to the substrate.

  FIG. 6 shows a state in which the re-rolled foil of the partially vapor-deposited foil pressed under the conditions described later is inspected. (A) is normally pressed, (b) is not partially pressed, (c) is pressed in the width direction, and (d) is pressed in the transport direction. As described above, the OVD foil inspection apparatus according to the present invention inspects the rewind foil by two kinds of methods. (A)-(c) is a state in which an inspection by binarization is being performed, and the transmission portion of the irradiation light within the stamped C range is recognized as the foil pressing portion G, and the non-transmission portion as the non-foil pressing portion H. The foil residue E is detected by measuring. If the foil pressing position is normal as in (a) and (b), the area of the non-foil pressing portion H is increased in (b) where there is a foil remaining E, and it is determined as a defective foil.

  (C), (d) is the case where the foil pressing position is shifted, but in the case of a large conveyance failure such that the foil pressing part extends beyond the inspection range F as shown in (c), the area of the non-foil pressing part H Increases and is determined to be a defective foil by the binarization inspection.

  (D) is a state of inspection by edge-to-edge measurement, and the foil pressing position is inspected by utilizing the difference in density of transmitted light at the contour and boundary of the object. In this case, the carrier film D1 including the register mark B is distinguished as the non-foil pressed portion H in order to determine the boundary between the foil pressed portion and the non-foil pressed portion. In the image processing step, the reference frame Z is provided, the width direction X1 (distance between the foil pressing part C and the carrier film D1) and the conveyance direction Y1 (distance between the foil pressing part C and the reference frame Z) are measured, and the distance X0 of the reference foil pressing position. In comparison with Y0, it is checked whether or not the foil is pressed at a normal position. If any one of the binarization and edge-to-edge measurement inspection methods is determined to be a defective foil, the foil is determined to be defective.

Next, the entire surface evaporated foil will be described.
As shown in FIG. 5 (b), the partially-deposited foil is composed of a pattern portion A on which a metal layer serving as a deposition portion is deposited, a register mark B, and a carrier film D2. When the foil is pressed, the range of C is transferred to the substrate.

  FIG. 7 shows a state in which the re-rolled foil of the whole surface vapor-deposited foil pressed under the same conditions as in FIG. 6 is inspected. As described above, the OVD foil inspection apparatus according to the present invention inspects the rewind foil by two kinds of methods. (A)-(c) is a state in which the inspection by binarization is performed, but unlike the partially evaporated foil, the carrier film D2 is deposited, and compared with the partially evaporated foil if it is a normal foil pressing position. The area of the non-foil pressing part H becomes large (FIG. 6 (a) and FIG. 7 (a)). However, the area (non-foil pressing portion H1) is constant, and if the remaining foil E as shown in (b) is detected as an increase, it is determined as a defective foil.

  (C), (d) is the case where the foil pressing position is shifted, but in the case of a large conveyance failure such that the foil pressing part extends beyond the inspection range F as shown in (c), the area of the non-foil pressing part H Increases and is determined to be a defective foil by the binarization inspection.

  (D) shows the state of inspection by edge-to-edge measurement. Similar to FIG. 6, the carrier film D <b> 1 including the register mark B is distinguished as the non-foil pressed portion H in order to determine the boundary between the foil pressed portion and the non-foil pressed portion. If any one of the binarization and edge-to-edge measurement inspection methods is determined to be a defective foil, the foil is determined to be defective.

It is the schematic which shows one Example of the OVD foil test | inspection apparatus concerning this invention. It is a block diagram which shows the structure of an OVD foil test | inspection apparatus. It is the schematic about the structure of the OVD foil test | inspection apparatus in a foil stamping machine. It is a flowchart regarding the inspection method of the OVD foil inspection apparatus. It is a part of the partially evaporated foil before pressing the foil and the entire evaporated foil. It is the schematic diagram which showed an example of the test | inspection content in a partial vapor deposition foil. It is the schematic diagram which showed an example of the test | inspection content in a whole surface vapor deposition foil.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rewind foil 2 Conveyance direction 3 Light source 4 Transmitted light 5 Information collection part 6 Trigger part 7 Information analysis part 7a Storage part 7b Operation part 7c Counting part 7d Determination part 7e Control part 8 Paper detection part 9 Operation part 10 Display part 11 Data Stacking unit 12 Warning unit 13 Paper feeding unit 14 Paper discharging unit 15 Base material (sheet paper)
16 Stamping plate 17 Impression plate 18 Foil unwinding section 19 Foil winding section 20 Foil transport section 21 Gripper A Design pattern section (vapor deposition section)
B Register mark C Foil stamping part D1 Carrier film (non-deposition part)
D2 Carrier film (vapor deposition part)
E Foil remaining F Inspection range X0 Reference distance (width direction)
X1 Measuring distance (width direction)
Y0 reference distance (conveyance direction)
Y1 measurement distance (conveyance direction)
Z reference frame

Claims (12)

An inspection device that inspects whether or not the OVD is reliably foil-pressed by detecting the remaining foil of the re-rolled foil obtained by rewinding the carrier film after foil pressing the OVD. A light source unit that irradiates light, a trigger unit that instructs the timing of capturing optical information obtained from transmitted light by irradiation from the light source unit, and information collection that captures the optical information and transmits the captured optical information to a subsequent process And an information analysis unit that compares the measured value obtained by analyzing the optical information as an image with a reference value of a normal re-rolled foil image stored in advance to determine whether the inspection object is good or bad. A characteristic OVD foil inspection device. The information analysis unit includes a storage unit that stores inspection conditions when a measurement value obtained by analyzing the optical information as an image and a reference value of the regular re-rolled foil image stored in advance is compared, and the information Perform binarization processing and edge-to-edge measurement on an image obtained from the optical information transmitted from the collection unit, and store the binarization processing result, the edge-to-edge measurement value, and the comparison inspection result. A calculation unit that feeds back to the signal, a counting unit that counts the OVD by a signal from the trigger unit, a measurement value obtained by analyzing the optical information of the calculation unit as an image, and a regular re-rolled foil image that is stored in advance And a control unit that controls an instruction signal for the comparative inspection and a signal that feeds back the comparative inspection result to the foil stamping machine. OVD foil inspection apparatus according to claim 1. The OVD foil inspection apparatus according to claim 1, further comprising an operation unit configured to set the inspection condition in the arithmetic unit. Display that displays optical information transmitted from the information collecting unit, a measured value obtained by analyzing the optical information as an image, a reference value of a normal re-rolled foil image stored in advance, and a determination result obtained from the determination unit The OVD foil inspection apparatus according to claim 1, 2, or 3 comprising a portion. Discrimination between product paper and other paper (mechanical adjustment paper, etc.) and paper detection unit for detecting presence / absence of paper passing and / or measurement values obtained by analyzing the optical information as an image and the regular rewinding stored in advance 5. The OVD foil inspection apparatus according to claim 1, further comprising a data accumulation unit that stores a reference value of the foil image, a counting result in the counting unit, and a determination result in the determination unit. The said information analysis part is provided with the warning part which alert | reports that to the operator, when it determines with the said determination result inspecting whether the said OVD is reliably foil-foiled being bad. The OVD foil inspection apparatus according to 3, 4, or 5. An inspection method for inspecting whether or not the OVD has been foil-foiled reliably by detecting the remaining foil of the re-rolled foil obtained by rewinding the carrier film after foil-foiling the OVD. And instructing the timing for capturing the optical information obtained there, capturing the optical information based on the timing, and analyzing the optical information as an image and a reference of a regular re-rolled foil image stored in advance An OVD foil inspection method for determining the quality of an inspected object by comparing values. An inspection condition for comparing and inspecting a measured value obtained by analyzing the optical information as an image and a reference value of the regular re-rolled foil image stored in advance is stored, and an image obtained from the optical information is stored. Binarization processing and measurement between edges are performed, the binarization processing result, the inter-edge measurement value, and the comparison inspection result are fed back to the storage unit, the number of OVDs is counted, and the optical information A comparison inspection between the measured value analyzed as an image and the reference value of the regular re-rolled foil image stored in advance is performed, the quality is determined by the comparison inspection result, and the instruction signal for the comparison inspection The OVD foil inspection method according to claim 7, wherein a signal for feeding back the comparison inspection result to a foil stamping machine is controlled. It is possible to set an inspection condition to be fed back for the next inspection after comparison inspection between the measured value obtained by analyzing the optical information as an image and the reference value of the regular re-rolled foil image stored in advance. The OVD foil inspection method according to claim 7 or 8. 10. The OVD foil inspection method according to claim 7, wherein the optical information, a measured value obtained by analyzing the optical information as an image, a reference value of a normal re-rolled foil image stored in advance, and the determination result are displayed. . Discrimination between product paper and other paper (mechanical adjustment paper, etc.), presence / absence detection of paper passing and / or measurement value obtained by analyzing the optical information as an image, and a reference value of the regular re-rolled foil image stored in advance The OVD foil inspection method according to claim 7, wherein the count result and the determination result are stored. 12. The OVD foil according to claim 7, wherein when the determination result obtained by inspecting whether or not the OVD is reliably foil-pressed on the sheet is determined to be defective, an OVD foil is notified to an operator. Inspection method.

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