JPH03501058A - Apparatus and method for inspecting plate glass - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Equipment and methods for inspecting plate glass Technical field TECHNICAL FIELD The present invention relates to an inspection device for a flat glass production line, and in particular for a pair of curved vehicles. The present invention relates to an apparatus for determining polymerization compatibility of glass window materials.

Background technology Known methods for manufacturing and forming glass sheets include making glass sheets optically indestructible. Defects may be introduced into the glass sheet that would otherwise make it intact. Ma In addition, defects may occur in sheet glass during post-manufacturing processing, such as bending. In some cases. Optical imperfections that can occur include surface distortions. here The surface distortion mentioned above refers to the distortion caused in a desired contour shape, such as a concave part or a convex part. It refers to irregularities consisting of, etc.

Surface distortion in a plate glass causes distortion in the image reflected by the plate glass surface. let For example, concave portions constrict the image, and convex portions magnify the image. Excessive distortion occurred In some cases, the distorted image renders the sheet glass unsuitable for use as a vehicle window material. Put it away. Furthermore, when manufacturing laminated glass windows, two pieces of curved glass are required. must be able to polymerize properly, otherwise the finished laminated glass This creates a gap between opposing surfaces that renders the assembly unusable.

One of the various methods proposed is described in U.S. Patent No. 3,857.637. There is a method for detecting distortion on the surface of a piece of glass, which has been disclosed. This patent specification is a light source and a position sensing photo to detect irregularities defects on the surface to be inspected. An inspection device using a deflector is disclosed.

A light source such as a continuous laser directs a light beam from the light source onto the surface of a plate glass. It is projected so that it moves at a constant speed along the trajectory of . Position detection photodetector The tester detects the part of the light beam that is reflected by the top surface of the glass sheet to be inspected. It is arranged to be released. If the surface being inspected is flat, the reflected light beam The beam is received by a photodetector along a predetermined reference line. light beam When reflected by a convex or concave surface, the reflected beam deviate from This inspection device uses a table that shows the characteristics of surface curvature and the height of the curved surface. The hand responds to the output signal of the detector to form a flatness profile of the surface. It has steps. Such equipment is capable of determining the flatness of the surface of a sheet of glass. Although it is possible, whether the degree of distortion of the plate glass being inspected is unacceptable. does not provide an equivalent means for analyzing the data to determine whether

Additionally, such devices are susceptible to errors due to changes in the position of the glass plate during the measurement process. Affected by differences.

U.S. Pat. A basic system for measuring lath flatness is disclosed. the angle of the light source When the reflected beam is focused on the screen, the surface If it is curved, a double image is formed.

According to this device, two surfaces, one called a flatness deviation on one surface and the other called an optical wedge, can be detected. Both surface parallelism deviations can be measured and distinguished. along the axial direction Parallel light is projected toward both sides of a weak cylindrical lens whose center is masked. shot. This light is projected onto the surface to be inspected and reflected back towards the lens. and the lens with a distance equal to the focal length in this dual lens system. It forms an astigmatic image on a screen made of frosted glass or the like.

When a light wedge exists, two different line images are formed on each side. On the other hand, in the case of a plate glass sample that is distorted but does not form an optical wedge, the lens It forms two images only if both sides of are used.

U.S. Pat. No. 3,799,679 discloses an oblique angle to the glass ribbon. A light source consisting of a laser, etc. to form a light beam with a finite width such as A glass strain scanning system for use is disclosed. reflected from the two sides of the glass The images are then sent to a scanning photomultiplier tube to measure the rate of change in the center-to-center distance between the two images. more detected. The center-to-center distance of the reflected beams changes depending on the distortion of the glass; The rate of change in refractive index gives a measure of the strained index of refraction in the glass.

U.S. Pat. An optical defect detection system using the beam is shown. This beam is normal The deviation of light transmitted through a glass ribbon that is projected at a large angle to It is used to indicate the existence of a defect. U.S. Patent No. 4,310.242 equipment for measuring the optical properties of windshields with three-dimensional contours. location is shown. A light beam is projected onto a beam splitter along an optical axis. anti A portion of the emitted light passes through the transparent body and is retro-reflected at the imaging plane of the light beam. It is reflected by the screen along the same path towards the beam splitter.

The part of the reflected light that passes directly through the beam splitter is the axis of the light beam toward it. It is detected by an optical sensor located at a considerable angle to the ground. of the statue Distortion and multiplexing occur in patterns in opaque regions that are superimposed on the original beam. It is detected by changes in the shape of the image and the properties of the image.

Inspecting the suitability of the shape of glass sheets with three-dimensional contours It is much more difficult than inspecting plate glass. through an intermediate layer made of synthetic resin material. When trying to form a laminated structure by The glass must be properly polymerized, but during this inspection process, The difficulties mentioned above become even more serious. Currently, the irregularities in the contour of the opposing surface The gap formed by the coincidence is shaped by a windshield made of laminated glass. It is discovered only after the process has been completed, causing a significant increase in cost in terms of labor and materials. There is. In this way, the polymerization compatibility of two glass sheets with three-dimensional contours can be evaluated. It is desirable to be able to determine this prior to the lamination process.

Disclosure of invention The present invention relates to a process for manufacturing a laminated glass windshield for a vehicle. For testing the polymerization compatibility of curved glass sheets or glass sheets with three-dimensional contours. The present invention relates to a method and apparatus. Two sheets of glass that are superimposed on each other are connected at their peripheries. It is placed on a polymerization support for polymerization. The laser beam is directed outside the stacked glass sheets. It is projected onto a surface and the reflected beam is detected. Detects the shape of the reflected beam , detecting the presence of defects.

In some embodiments, the polymerization support holds the glass sheets polymerized together in a generally horizontal Support on the surface. The camera array is above the top surface of the glass sheet and on the top surface of the glass sheet. It is placed facing towards and receives reflected light. The laser beam is aligned with the axis of the glass plate. along a line perpendicular to the camera array and parallel to the camera array. scanned. The gap between the panes of glass is detected as two spaced lines, Surface distortions are detected as deviations from the desired contour surface.

Brief description of the drawing In the attached drawing, FIG. 1 shows an inspection apparatus according to the invention for paired glass sheets stacked one on top of the other; Block showing the line for manufacturing laminated glass windshields with FIG. 2 is a perspective view and a block diagram of the inspection device shown in FIG. It is shown in combination, FIG. 3 shows the inspection device shown in FIG. 2 in a combination of a side view and a block diagram. It is a thing, FIG. 4 shows the various images formed by the inspection device shown in FIG. 2; Figure 5 shows the production of stacked glass windshields equipped with an inspection device based on the present invention. FIG. 6 and FIG. 7 are block diagrams of the control system, and FIGS. There is a diagram showing the image that will be created. FIG. 8 is a flow diagram illustrating a method for inspecting sheet glass according to the present invention. .

Disclosure of invention According to the invention, there is provided a method for inspecting a curved transparent plate, comprising: a) at least The peripheral edges of both transparent plates are locked by a polymerization support, and both plates are connected to each other. b) supporting the outer surfaces of these plates that are superimposed on each other; C) projecting a light beam along said outer surface according to a predetermined trajectory; d) detecting the reflected beams and aligning them with each other; and a process of determining whether the polymerized transparent plate material is good or bad. A method is provided.

Further, according to the present invention, there is provided an apparatus for inspecting mutually superposed transparent plates. For locking the peripheral edges of at least two mutually overlapping transparent plates. a polymerization support, a light beam source for forming a light beam, and a polymerization support and a light beam source for forming a light beam; By projecting the light beam according to a predetermined trajectory along the outer surface of the marking plate, means for forming a beam of light; Detects the reflected beams formed by reflection from a surface and overlaps each other. and means for determining whether the polymerization compatibility of the plate material is good or bad. be done.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a laminated glass window containing a polymerization compatibility testing station according to the present invention. A windshield manufacturing line 11 is shown. formed as a windshield The sheet glass to be processed is delivered from the furnace 12 to one end of the line 11 and is directed by the arrow 13. The product is transported toward the other end of the production line along the direction shown. The furnace 12 is shown in FIG. A series of glass plates, not shown, are each heated, and the heated glass plates are discharged from the furnace 12. After being sent out, it is fed into the bending nibless 14. The bending nibless 14 After forming the glass sheet to the desired profile, the glass sheet is placed in a plastic head station. sent to section 15. Plast head station 15 can be used to heat plate glass. The cooling air is generated in a predetermined pattern. In many cases, laminated glass The sheet glass used as a windshield is not tempered and therefore In 11, no plast head station 15 is provided.

Following the plasto head station 15, its temperature is lowered and the subsequent process It is cooled by a cooling fan 16 to provide sufficient stability for handling. be done. The sheet glass is thus conveyed by the conveyor 17 to the peripheral inspection support 17. Ru. The support body 17 engages with the peripheral edge of each glass plate, and the peripheral edge of the glass plate is Determine whether it fits into the corresponding opening in the vehicle. Next, the plate glass is conveyed to the conveyor 19, reversed by the flipper conveyor, and further transferred to the polymerization support 20. The plate glass is detected by a gap detector 21 according to the invention. , a pair of glass plates laminated to a polymerization support 20 are inspected. This board gala If the laminate pair passes inspection, it is transported to packing station 22 where the laminate pair is Should be laminated with a synthetic resin interlayer to form a lath windshield transported towards the area.

In modern manufacturing processes, information about the manufacturing process and product characteristics is collected and It is important to issue commands that change the process. In view of these points, the first A host computer 23 as shown in the figure can be installed. Hoss The host computer 23 is connected to the pass line 24, and the pass line 24 connects all Connected to station and control units 12.14-22. in this way The host computer 23 is connected to each station and the production line 11. Information can be collected and command signals can be sent to each control device.

FIG. 2 shows a polymerization support 20 and a gap detector 21 according to the present invention. has been done. The polymerization support 20 is fixed to a peripheral support wall 26 that extends generally upward. The base 25 and the wall 26 have a base 25 supported against the ground. Illustrated as being fixed to a suitable support surface, such as a floor 27 in a manufacturing facility. There is. On the polymerization support 20, a pair of three-dimensional Contoured glass panes 28,29 are installed and these panes are used for vehicles. before being laminated as a windshield.

Its polymerization compatibility is tested.

The track 30 extends from one side edge 28b of the sheet glass to the other side edge 28c, The water is parallel to the axis of the glass plate 28,29 indicated by line 28a. It extends flat. The track 30 is spaced above the polymerization support 20 and each end of which is fixed to a suitable support structure 31 fixed to the floor 27. There is.

The gap detector 21 has a carriage 32 that engages with the track 30 and has a key. The carriage 32 moves along the trajectory 30 under precise control by a suitable servo system. It can be moved from one end to the other. For example, using the servo motor 33 , the carriage 32 in each of a plurality of different positions relative to the glass sheet 28,29. It can be moved along a trajectory 30 toward. The light beam source 34 The beam 35 is projected onto a scanning mirror 36. Typically, the laser beam source is Used to form beams.

The mirror 36 is rotated in a plane perpendicular to the axis 28a of the glass plate 28.29. Turn around. In this way, the laser beam 1.35 is 1, the mirror 36 (the upper plate It is reflected as an incident beam 37 to be projected onto the top surface of glass 28 . mirror The velocity of movement of 36 is such that the incident beam 37 is d so as to form a solid line 38 that defines the scanning locus between the two.

The incident beam 37 is reflected by the top surface of the glass plate 28 as a reflected beam 39; The reflected beam 39 is projected onto the opposite surface of the reflective screen 40 of the gap detector 21. shot.

Reflected beam 39 is reflected by reflective screen 40 as image beam 41.

A reflective screen 40 projects an image beam 41 through a lens 42 to a camera 43. Ru.

As shown in FIG. 3, which shows a side view of the polymerization support 20 and the gap detector 21. As shown, scanning mirror 36 rotates around pivot point 44 as shown by arrow 45. The beam 37 is rotated so that the opposite edges 2 of the glass sheets 28, 29 overlap each other. The beam 37 is scanned between 8d and 28e. Multiple lenses 42 and camera 43 are provided in a row, each with an image beam 41 reflected by a reflective screen 40. As the image beam 41 is reflected, its direction is changed so that the image beam 41 is received at a plurality of predetermined positions. is determined. This row is generally orthogonal to the axis 28a of the glass plate 28. Generally parallel to the outer surface. In this way, by each camera 43, the image shown in FIG. As shown, a portion of reflected beam 39 corresponding to a predetermined position along line 38 is detected. put out Although not shown for clarity, the laser beam source 34, Scanning mirror 36, reflective screen 40, lens 42 and camera 43 are all suitable. It is mounted on the carriage 32 via a support body, and together with the carriage 32, it is mounted on the track. It is possible to move from one end of the road 30 to the other end. In this way, the line 38 along the axis 28a from one edge 28b to the other edge 28c. can scan all areas of the surface. Any known type of servo control machine By using a structure, the line 38 is moved along the axis 28a of the glass plate 28.29. As a result, the incident beam 37 includes the line 38 and is relative to the top surface of the glass plate 28. Gap detection to maintain the required angle between orthogonally extending surfaces 21 can be rotated.

FIG. 4 shows three types of beams formed on the reflective screen 40 by the reflected beam 39. A statue is shown. Image 46 shows that both glass plates 28.9 are aligned with each other with no gap. A good stacked board that not only properly polymerizes but also has a proper contour shape. Pairs of glass plates 28, 29 are shown to form a glass windshield structure. Ru. Image 47 shows a pair of poorly polymerized glass sheets. The upper plate glass 28 The upper line 48 formed by the lower plate glass 29 and the lower line 49 formed by the lower plate glass 29 are are separated from each other at a distance so as to define a gap 50; The presence of 50 renders the laminated glass windshield defective.

The images 51 overlap properly with each other, but where the glass plate should be concave, there are convex portions 52. A pair of panes of glass are shown that have unacceptable distortions such as .

The images 46, 47.51 shown in FIG. 4 are obtained from the four sides of the glass plate 28.29. A reflected image along line 38 is shown.

Needless to say, the reflective screen 40 is monitored by humans, and the From the image shown, it can be determined whether the pair of glass sheets that are superimposed on each other are "good" or "defective." It can be determined whether the However, as shown in Fig. As mentioned above, the device according to the invention can be installed in a control system for a production line 11. It can also be incorporated. That is, to exchange information with the host computer 23. A microprocessor 53 can be connected to the pass line 24 at the same time. micro Processor 53 is connected to servo control unit 54 by lines 54a, 54b. has been done. The servo control unit 54 performs gap detection via a line 54c. The motor 21 is connected to a servo motor 33 in the motor 21. The microprocessor 33 , sends a command signal on line 54a to define the position of gap detector 21. put out. position) feedback signal is sent from the servo control unit 54 via line 54b. and sent to the microprocessor 53. Turtle in gap detector 21 The operation of the array 43 is sent out from the microprocessor 53 on line 55. Control signals control the collection of information contained in the image beam 41. mosquito The signal representing the image beam 41 obtained by the mela array 43 is transmitted via line 56. It is sent to buffer 57. Microprocessor 53 provides a buffer via line 58. The information is read from the file 57. The microprocessor 53 is the camera array 43 The information is processed and displayed in the desired format on the monitor 60 via line 59. cormorant. For example, the microprocessor 53 controls the upper line 48, the lower line 49 and the gap. 50 can be enlarged and displayed on the monitor 60.

Another use of monitor 60 is to use it to compare images to predetermined limits. I can do it. For example, FIG. 6 shows the result of a pair of mutually polymerized glass sheets. Image 61 is shown. The microprocessor 53 is , a pair of envelopes 62, 63 defining the tolerance range that the image 61 must occupy. It is formed on the monitor 60.

In the distorted region 64, the images 61 pass through the upper envelope 62, so they overlap each other. It is detected that the pair of glass sheets that have been removed are defective. As another example, polymerized with each other There is a measurement of the gap between flat glass sheets. In Fig. 7, the result obtained from image 47 in Fig. 4 is The upper line 48 and the lower line 49 are connected to a pair of gaps formed on the monitor 60. It is compared with the drop tolerance line 65.66. Gap tolerance line 65.66 is a pair of plate glass. extending parallel to each other at a predetermined distance representing the maximum gap allowed between the There is. As shown in FIG. 7, the gap 50 exceeds the allowable limit and the plate It is detected that the glass pair is defective.

FIG. 5 further shows that between the microprocessor 53 and the alarm indicator 68, A connected alarm line 67 is shown. For example, as shown in Figure 6 A pair of defective glass sheets with distortions, gaps 50, etc. shown in FIG. Once detected by processor 53, an alarm signal is sent to the alarm via line 67. is sent to the system indicator 68. Alarm indicator 68 indicates a defective plate glass A visual or audible indicator to inform the operator that a pair has been detected. It may consist of any conventional type of device, such as a indicator. Needless to say, Using an alarm signal, a pair of defective glass sheets is automatically removed from the polymerization support 20. The device can also be controlled to collect.

In its simplest form, the method according to the invention uses a light source and a detector. scanning the outer surfaces of a pair of glass sheets that are superimposed on each other. example For example, by rotating the laser beam source 34 shown in FIG. It can also be projected onto the upper surface of the lath 28. Laser beam source 34 is on the floor 27, the polymerization support 2o is moved and the laser beam 3 5 can be scanned in a predetermined pattern along the top surface of the glass plate 28. . The reflected beam 39 is directed toward a reflective screen 40 or through a lens 42. The image can be directly projected toward the camera 43. Alternatively, the polymerization support 20 It is fixed to the floor 27, and the laser beam source 34 is moved to direct the laser beam 35 to the plate glass 2. It is also possible to scan along the top surface of 8. In a fully automated system , the reflective screen 4o shown in FIGS. 2 and 3 is omitted, and the camera row 43 is placed above. The reflected beam 39 is directed towards the upper surface of the side glass 28 and receives the reflected beam 39 through the corresponding lens 42. It can be made to glow.

The resolution of the system according to the invention depends on the number and type of cameras 43 used. It is determined. Camera 43 typically consists of a linear array of photodiodes. . The diodes in the array are spaced, for example, 1/32 inch apart; This determines the number of cameras required to inspect a sheet of glass of a given size. . The servo motor 33 is operated with respect to a normal line extending perpendicularly from the top surface of the plate glass 28. to control the angle formed by the incident beam 37 and the position of the carriage 32 along the trajectory 3o. It may consist of a two-axis servo system for

FIG. 8 is a flow diagram illustrating a method of operating an automatic inspection system according to the present invention. It is shown. The method begins with the step indicated by circle 69 and continues. Information regarding good copolymerized sheet glass is loaded in instruction set 70. In other words, it is stored. For example, as shown in FIG. 5, the host computer 23 , the microprocessor 53 sends information regarding pairs of glass sheets that are well-polymerized to each other. to store this information and compare it with the data obtained during the actual test. . Alternatively, a pair of mutually polymerized glass plates known to be good The information obtained by the camera array 43 is sent to the microprocessor detector 21. Store in the memory of the processor 53 and obtain a good profile of the mutually superposed glass sheets. can also be taught to the system.

After the information about the good pair of glass sheets is loaded into the system, the first The combined plate glass is placed on the polymerization support 20, the instruction set 71 is executed, Information specifying the pair of plate glasses is obtained from the host computer 23. host compilation The computer 23 identifies each pair of glass plates as they pass through the production line 11. do the work that is done. The instruction set 72 is executed and the camera array 43 is A pair of mutually superposed glass sheets of body 20 is scanned. Camera as above The information obtained by array 43 is typically used, such as during execution of instruction set 73. The data is stored in the buffer 56 until it is read out by the microprocessor 53.

A set of instructions 74 is then executed to collect the data obtained from the pair of glass sheets being inspected. , compared with the stored data obtained from a pair of good glass plates. microprocessor 53 by executing the instruction set 75 as shown in FIGS. 4, 6, and 7. The monitor 60 can be operated to display the captured image. The determination process 76 It is determined whether the inspected pair of glass sheets is good or bad. this If the pair is defective, the determination result is NO, so instruction set 77 is executed. alarm 68 is activated. Judgment if the polymerized glass plate pair is good The result in step 76 is YES. If the judgment result is YES, or If instruction set 77 is executed, instruction set 78 is executed and the microprogram is executed. Processor 57 hosts data regarding pairs of inspected mutually superposed glass sheets. and sent to the computer 23. The flow then proceeds to decision step 79 where the now examined Determining whether a pair of glass sheets that are superimposed on each other is the last pair to be inspected. Ru. If yet another pair is tested, the judgment result will be No and the instruction set will be repeated. Return to 71. If the last pair of glass sheets superimposed on each other is examined, the judgment The result is YES, and the operation is stopped at the step indicated by circle 80.

From the microprocessor 53 to the host computer 23 via the path line 24 The inspection information sent is for inventory management purposes or statistical data in general manufacturing processes. It can be used as a data. Also, this information can be used on the production line shown in Figure 1. It can also be used to adjust 11.

For example, the information obtained from microprocessor 53 may indicate the type and degree of distortion. Not only can you identify it, but you can also pinpoint the location of the distortion on the glass plate. subordinate Therefore, the host computer determines that the strain is caused by the furnace 12, the bending nib 14, It is caused by either the head 15 or the cooling fan 16. It is possible to determine whether there is In this way, the host computer 23 Distortion can be eliminated by modifying or adjusting the operating method. Wear.

FIG.5 FIG.6 FIG. 7 Compliance investigation report

Claims (1)

[Claims] 1. A method for inspecting a curved transparent plate, the method comprising: a) at least two transparent plates; The peripheral edge of the clear plate material is secured by a polymerization support, and the two plates are overlapped with each other. a process of supporting the b) projecting a light beam towards the outer surface of the plates superimposed on each other; c) scanning a light beam according to a predetermined trajectory along said outer surface to form a reflected beam; The process of d) Detecting the reflected beam and determining whether the transparent plates overlapped with each other are good or bad. A method characterized by comprising the steps of: 2. Claim 1, wherein the transparent plate material is made of plate glass. the method of. 3. Said step b) is carried out by forming said light beam as a laser beam. A method according to claim 1 or 2, characterized in that the method is carried out by: 4. In step c), the laser beam is projected onto a scanning mirror, and the polymerized Form the incident beam as a line on the outer surface approximately perpendicular to the axis of the transparent plate, and The incident beam is directed along the axial direction from one side edge of the transparent plate material to the other side edge. According to claim 3, the method is carried out by moving the the method of. 5. Said step d) is carried out by comparing said reflected beam with predetermined limits. A method according to claim 1, characterized in that: 6. An apparatus for inspecting mutually polymerized transparent plates, the apparatus comprising: For polymerization for locking the peripheral edges of at least two mutually polymerized transparent plates a support and a light beam source for forming a light beam; By projecting the light beam according to a predetermined trajectory, a reflected beam is formed. and means for By reflecting the light beam from the surfaces of the plates that are superimposed on each other. The formed reflected beam is detected and the polymerization compatibility of the mutually polymerized plates is determined. and means for determining good quality. 7. A base for supporting a floor surface, in which the polymerization support is fixed to a generally upright support wall. 7. A device according to claim 6, characterized in that it comprises: 8. The polymerization support is movable with respect to the light beam source. The method according to claim 6. 9. The light beam source generates a laser beam as the light beam. Apparatus 10 according to claim 6. the light projection means are superposed on each other; scanning to reflect said light beam as an incident beam facing the outer surface of the glass sheet; 7. Device according to claim 6, characterized in that it includes a mirror. 11. The detection means includes a receiver for generating an information signal in response to the reflected beam. and a camera, and respond to the information signal to determine the quality of the polymerized plate material. 7. A device according to claim 6, characterized in that it comprises means for: 12. The detection means is substantially orthogonal to the axis of the polymerized plate and a plurality of rows extending generally parallel to the outside surface of the board The camera includes a camera, and the camera uses information to judge the quality of the polymerized plate material. responsive to at least a portion of said reflected beam to generate a signal. 7. The device according to claim 6, characterized in that: 13. The detection means includes a reflecting beam for forming an image beam from the reflected beam. respond to the image to determine whether the clean and polymerized plate material is good or bad; 7. The apparatus according to claim 6, further comprising a camera. 14. The light projection means and the detection means are mounted on a carriage, and the above-mentioned to the polymerization support to project the light beam along a predetermined scanning trajectory. The method according to claim 1, further comprising means for moving the carriage by A device according to scope 6. 15. In order to move the carriage along the axis of the polymerized plate, the Claims comprising a servo motor coupled to the carriage. Apparatus according to paragraph 14. 16. The light beam is maintained at a predetermined angle with respect to the outer surface of the polymerized plate. a servo motor connected to the light beam source so as to 15. The apparatus according to claim 14. 17. A command signal is sent to the light projection means to form the predetermined scanning line. a microprocessor connected to said light projection means for providing a signal; 15. The device according to claim 14, characterized in that: 18. The detection means comprises a camera array connected to the microprocessor. and the microprocessor generates a control signal to cause the camera array to move forward. In response to the control signal and the reflected beam, the sheets of glass are overlapped with each other. Claim 17, characterized in that the information signal indicating the state of the device is generated. equipment. 19. a monitor connected to the microprocessor; A processor responds to the information signal to present a visible image of the polymerized plate. 19. The apparatus of claim 18, wherein the apparatus is generated on the monitor. 20. an alarm connected to the microprocessor; and an alarm connected to the microprocessor; The processor responds to the information signal to determine if the polymerized plate is defective. generate an alarm signal for activating said alarm to indicate that 19. The device according to claim 18, characterized in that: 21. An apparatus for inspecting mutually polymerized sheet glass, the apparatus comprising: Peripheral straight edges for locking the peripheral edges of at least two mutually overlapping transparent plates. a polymerization support having a base attached to a vertical wall; a laser beam source for forming a laser beam and the plates superimposed on each other; By projecting the laser beam according to a predetermined trajectory along the outer surface, the reflected beam is means for forming a system; The reflected beam is detected and the compatibility of the mutually superposed plates is determined. and means for determining. 22. a microprocessor, a servo control unit, and the servo control unit and a servo motor connected to the laser projection means, The microprocessor controls the servo motor to define the predetermined scan line. connected to the servo control unit to generate a command signal for controlling the servo control unit. 22. A device according to claim 21, characterized in that the device is connected to 23. a camera array connected to the microprocessor; A microprocessor generates control signals for the camera array and The array responds to the control signal and the reflected beam to generate a polymerized plate. Claim 22, characterized in that an information signal indicating whether the glass is good or bad is generated. The device described in.