Camera device for a glass forming machine

Abstract

A camera device (1) for a glass forming machine having a camera (2), a lens (3) and a lens system (4) is characterised in that the lens system (4) defines an entrance pupil (E) on its side facing away from the lens (3), in that the camera device (1) has an aperture (5) between the lens system (4) and the object (6), and a barrier air flow (7) is directed away from the lens system (4) through an aperture opening (8) of the aperture (5).

Description

[0001] Camera device for a glass forming machine

[0002] The invention relates to a camera device for a glass forming machine with at least one camera, an objective lens and optionally a lens system.

[0003] A corresponding camera device is known, for example, from WO 2010 / 047579 A1. This comprises one or more cameras arranged in a glass forming machine laterally below an outlet of a glass gob feeder and above a corresponding mold. The cameras are intended to determine the glass gob velocity, the direction of the glass gob velocity, or the like.

[0004] Another camera device of a glass forming machine is described, for example, in US 6,089,108, wherein a sleeve component is arranged in front of the actual camera in the direction of the object to be recorded.

[0005] A glass forming machine can, for example, be configured to form a workpiece in the shape of a bottle or other glass container from a glass gob. A well-known glass forming machine in this context is, for example, a so-called IS machine, which has individual sections that produce corresponding containers independently of one another. Individual glass gobs are cut off and fed to the various production sections or sections via a distribution system. Such an IS machine is widely used in hollow glass production. A corresponding camera device can be assigned to different areas of such a glass forming machine, e.g. in an area for discharging the glass gobs, an area with the forming tools, an area for discharging the still-hot hollow glass products, or in an area for discharging the hollow glass products from the corresponding glass forming machine.

[0006] In all of these areas, it has been shown that camera devices for controlling and recording process variables can improve the production of the corresponding products. However, it should be noted that the camera device is subject to considerable demands in terms of heat and contamination under the existing environmental conditions. The camera device should be capable of capturing both still images and image sequences, or even film recordings of moving objects.

[0007] The disadvantage of the camera devices known so far was that, due to, for example, cyclical lubrication processes of molds and the resulting rising oily vapor, heat stress and other contamination, the corresponding camera optics could only be used inadequately or not at all in a relatively short time.

[0008] DE 10 2004 025 666 A1 discloses an image capture device configured for use in material web inspection processes, for example, in pulp and paper production and in the processing of paper webs. Finally, US 2015 / 0185592 A1 discloses a camera device that uses cleaning fluid.

[0009] The invention is therefore based on the object of improving a camera device of the type mentioned at the outset in such a way that it can be used safely and for a long time at various stations of a glass forming machine, even at correspondingly high temperatures and in the presence of contamination.

[0010] The object of the invention is achieved by a camera device having the features of patent claim 1 or by a glass forming machine according to patent claim 20.

[0011] The invention is particularly characterized by the fact that the lens system defines an entrance pupil on its side facing away from the objective (i.e., facing the object), and that the camera device has a diaphragm between the lens system and the object, and a sealing air flow is directed through a diaphragm opening toward the object. Thus, the camera device according to the invention combines three measures that, in particular, prevent contamination of a corresponding camera lens and, at the same time, largely prevent heat transfer toward the camera device.

[0012] The camera device is therefore designed such that an entrance pupil lies outside the area between the objective and the lens system of the camera device, i.e., the entrance pupil lies between the lens system and the object to be observed. The entrance pupil is the virtual opening in the object space through which a beam of rays coming from the object enters the optical system of the camera device. The invention is characterized in that the beam of rays converges from the object to the entrance pupil before diverging again from the entrance pupil to the first lens of the camera device.

[0013] For this purpose, the optical system of the camera device can be designed in such a way that a virtual intermediate image of the object is formed between two lenses of the lens system or between the lens system and the lens, at which the beam path is in focus.

[0014] The distance between the entrance pupil and the lens system can be, for example, from 40 mm to 150 mm, preferably from 50 mm to 80 mm. The distance between the entrance pupil and the lens system is the distance at which the entrance pupil is located in front of the outermost surface of the lens system.

[0015] The camera device or its lens system can be designed so that the beam at the entrance pupil has a width (either FWHM, full width at half maximum, or distance between the marginal rays) of 1.7 to 5 millimeters, preferably 2 to 4 millimeters. The narrower the beam width at the entrance pupil, the smaller the aperture can be without compromising the imaging properties of the lens system.

[0016] In the simplest case, the lens system can comprise a single lens, but will preferably comprise more than one lens. The lens system can be configured, in particular, as an achromatic lens system, i.e., as an achromat. The lens system can be configured as a two-lens achromat. The lenses of the lens system can, for example, have a diameter of 20 to 40 mm, preferably 25 to 35 mm. The lens system—especially when configured as a two-lens achromat—can have a total thickness in the axial direction of 15 to 30 mm, in particular 20 to 25 mm.

[0017] The aperture forms a constriction point for the optical beam path, so that the ingress of dirt towards the optics is largely prevented by the aperture itself. The aperture represents an actual opening without being covered by a protective screen or the like, although such a protective screen could in turn be contaminated by dirt. The blocking effect of the aperture is further supported by a blocking air flow being directed through the aperture towards the object. This means that the blocking air flow points from the direction of the camera or the lens system towards the object, i.e. the object to be monitored by the camera device. The aperture is arranged close to or preferably essentially exactly at the point at which the beam path is maximally constricted by the lens system, i.e. at the entrance pupil of the lens system.Overall, these are three measures that, in synergy, provide successful insulation of the camera device against contamination as well as against heat exposure.

[0018] It is possible for all parts of the camera device to have their own housings and be arranged one behind the other, facing the object. However, to make the camera device easier to handle, it can be advantageous for it to have a device housing in which at least the camera, lens, lens system, and aperture are located. This allows all relevant parts of the camera device to be arranged and handled together. Outside, the device housing provides a separate means of protecting the camera device from further contamination or other mechanical influences.

[0019] The distance between the lens and the lens system can be, for example, from 80mm to 140mm, preferably from 90mm to 110mm.

[0020] Depending on the object, it may be advantageous to partially alter the beam path to achieve a suitable image of the object or parts of it. This can be achieved, for example, by varying the distance between the camera and the lens and / or between the lens and the lens system and / or between the lens system and the aperture.

[0021] Such distance variability can be achieved continuously or by arranging one or more intermediate rings in the device housing between the corresponding parts of the camera device.

[0022] To easily adjust the distance between the lens system and the aperture and simultaneously position them relative to each other, an insert with an inner cone can be arranged between the lens system and the aperture. The inner cone essentially has a shape analogous to the beam path from the lens system to the aperture and can, for example, be directly connected to the lens system and extend to the aperture opening, with a corresponding conical opening of the inner cone being assigned to the aperture opening.

[0023] However, a corresponding distance variability is also possible with regard to the insert part relative to the lens system or the aperture.

[0024] To prevent annoying reflections from the inside of the inner cone, this inner surface can be optically neutral. That is, it can be non-reflective, for example, or even dark or even black.

[0025] Reference has already been made to the sealing air flow that exits through the aperture toward the object. In this context, it may prove advantageous if the insert has at least one air outlet directed substantially toward the aperture. The insert is thus used to supply and direct the sealing air flow. In this context, it is possible for the air outlet, for example, to be substantially annular or, for example, to be formed by a number of air outlets spaced apart from one another in the circumferential direction of the insert.

[0026] To easily arrange and align the air outlet(s), the at least one air outlet can be formed between the outer side of the inner cone and a substantially cylindrical end portion of the insert. The air outlet can be geometrically shaped such that it exerts a directional effect on the sealing air flow, or such that the corresponding orientation of the sealing air flow is determined by the outer side of the inner cone and the cylindrical end portion of the insert.

[0027] A corresponding diaphragm with a diaphragm opening can be designed in various ways, for example, iris diaphragm, slit segment diaphragm, or the like. Also conceivable and of essentially simple design is the design of the diaphragm as a pinhole diaphragm. This means that the diaphragm opening is formed by a simple geometric hole in the diaphragm, the diameter of which essentially corresponds to the maximum constriction point of the beam path from the lens system side.

[0028] If, in one embodiment, all corresponding parts of the camera device are arranged linearly one behind the other in the direction of the object, the camera device can have a relatively large overall length. However, for certain stations of the corresponding glass forming machine, it can prove advantageous if the overall length is relatively short. This can be achieved, for example, by the device housing having first and second substantially parallel receiving sections and a deflection section connecting them. This results in a "folded" beam path. At least the camera and lens can be arranged in the first receiving section, and at least the lens system, insert part, and aperture can be arranged in the second receiving section. The corresponding deflection section serves to deflect the optical beam path; the substantially parallel receiving sections can also be arranged directly next to one another, for example, with only one partition.

[0029] To enable the deflection section to be designed in a simple and optically effective manner, it can have at least two internally mirrored deflection walls arranged substantially at right angles to one another. These two deflection walls serve to deflect the beam path by a total of 180°. To enable parts of the camera device to be arranged variably in their position or to be exchanged separately from one another in a simple manner, all parts of the camera device can, for example, be releasably attached and variable in their position and their mutual spacing. It has already been pointed out above that the spacing can be varied by arranging one or more intermediate rings.

[0030] It was already pointed out at the beginning that high temperatures can occur within a glass forming machine. In order to be able to detect these, particularly with regard to glass drops, shapes, objects, etc., the camera of the camera device can be a camera that is sensitive at least in the near infrared range. One exemplary embodiment of such a camera is an infrared camera, which is, however, characterized by its relatively high cost. It is also possible to use a CMOS camera, as these are generally sensitive beyond the visible range in the near infrared range. In order to be able to capture only this near infrared range with this camera, the camera can be designed with a blocking filter for essentially the visible spectrum. This blocking filter, for example, blocks all frequencies up to a wavelength of approx.750, 800, 850, or more nanometers (nm) are filtered out, and only the remaining range above the corresponding wavelength, up to the end of the camera's sensitivity, is captured. This makes it possible to largely eliminate the influence of visible light and only capture radiation in the thermal range. This is particularly advantageous for glass forming machines at temperatures above 350°C, as these corresponding temperatures become visible or measurable with the camera.

[0031] In order to change the orientation of the camera device if necessary, or to use two or more camera devices together and vary their orientation, a device housing of the camera device can be pivotably mounted. A pivoting device can be part of the device housing, so that it can be installed in the glass forming machine with a corresponding pivoting device. It is also conceivable to attach the camera device or the device housing to a pivoting device provided in the glass forming machine.

[0032] It may also prove advantageous if the aperture can be varied in its opening area and / or shape. This can change the optical and imaging properties of the camera device as required. Of course, the camera device can also be used across the optical spectrum if necessary, for example, to capture the shape or speed of the glass drops or the molds used to form a glass container.

[0033] To enable the camera device's signals to be evaluated as required, the camera device is connected to an evaluation device. This connection can be made via a cable or wirelessly. The corresponding connection to the evaluation device can also be used to change camera device settings, such as adjusting the aperture, changing the distance between the camera device's parts, pivoting the device housing, and the like.

[0034] The above-mentioned sealing air flow is typically generated from compressed air supplied to the camera device. A simple way to supply this air is to have a compressed air connection in the device housing. A compressed air source can be easily connected to this via standard connectors.

[0035] It may also prove advantageous if the sealing air flow can be used as a cooling air flow inside the device housing before exiting through the aperture, particularly for cooling the camera or other electrical and electronic devices in the device housing. The presence of air outlets, see the above description, results in a sufficiently strong sealing air flow towards the aperture, largely preventing contaminants from entering the camera's optics through the aperture opening.

[0036] The invention also relates to a corresponding glass forming machine with at least one camera device according to one of the variants described above.

[0037] An arrangement of such a camera device is briefly described below for a so-called IS machine, although the camera device can also be used in other glass forming machines, in particular in different stations of a corresponding glass forming machine. It should also be noted that the different stations of a glass forming machine have different requirements for the camera technology, for example to capture different parameters. This means that the camera device according to the invention can be constructed differently in these different stations, for example to capture the object in the visible range, capture the object in the near infrared range, or capture from different directions. In a corresponding IS machine, a glass container is manufactured in two successive steps.The glass gob falls into a preform side and is pre-formed there. In this first step, the mouth of the glass container is already formed and a cavity is created. After pre-forming, the glass container is essentially turned over so that its mouth points downwards. A transfer mechanism pivots the pre-formed object to, for example, another side of the glass forming machine and a final mold side closes so that the glass container is inflatable and takes on its final shape. These different stations and work steps can all be monitored by the camera device according to the invention and corresponding parameters of the parts or objects used can be recorded. This applies, for example, to the temperature or temperature distribution of the corresponding parts, such as mouth tools, preforming tools, stamps or even pre-formed glass containers as objects.In addition to temperature assessment, the inflow of the glass drops can also be assessed, particularly the speed of the inflowing glass drop, the length of the inflowing glass drop, the temporal offset of successive drops at a station or in different stations, and the like. It is also possible to assess the various objects with regard to, for example, glass adhesion to the molding tools, stuck drops, failure of a movement mechanism of the corresponding molding tools or during the movement of a transfer mechanism, the inflow of two or more drops, and the like.

[0038] In this context, the installation of one or more camera devices per station or section of the respective glass forming machine is conceivable. If only one camera device is used, a suitable installation position must be chosen so that certain parameters can be recorded and others cannot. For example, if the camera device is installed in a central plane of the station, all the relevant components are symmetrically visible. However, consecutive drops may then obscure each other as they fall, making it impossible to assess the glass drops.

[0039] In IS machines used today, between one and four gobs fall consecutively into one to four tool sets per section of the respective machine. For a machine with only one glass gob, one camera device is sufficient, although nowadays double and triple gobs are generally used in a corresponding station. This means that it is also possible to arrange two or more camera devices in the glass forming machine, offset laterally and / or at an angle relative to the sections or stations. With sufficient lateral offset, all individual gobs can then be visible side by side.

[0040] However, this can result in an asymmetrical arrangement of the camera device with regard to the mold tools.

[0041] It is conceivable to use, for example, two camera devices per section or station, so that essentially a three-dimensional view is obtained in order to monitor an offset in different coordinate directions and also the corresponding angle of incidence of the drops to a mold opening.

[0042] According to the invention, it is also conceivable that two cameras with corresponding optics are arranged in a device housing and, for example, enable this three-dimensional vision.

[0043] The data captured by the camera device, which can be fed to the evaluation device, can be used in a variety of ways. For example, the data can be fed into control loops, and appropriate stabilization measures can be implemented for the production of the glass objects. Such stabilization measures relate, for example, to changes in day and night, changes in humidity, and the like, all of which can affect the production process of the glass containers and should be adjusted accordingly to stabilize the overall process.

[0044] Also conceivable is intervention in time parameters for corresponding tool cooling processes, automatic shutdown of individual sections or stations upon detection of an exceptional situation, or the tracking and rejection of containers after their production and downstream of the corresponding glass forming machine after irregularities on the container have been detected, such as adhering glass, significant temperature deviations, or the like. The corresponding measured values ​​can be used in the evaluation device not only for evaluation but also for archiving for process traceability.

[0045] In the following, advantageous embodiments of the invention are explained and described in more detail with reference to drawings.

[0046] Shown are: Fig. 1 a longitudinal section through a first embodiment of the camera device according to the invention,

[0047] Fig. 2 is a longitudinal section through a second embodiment of the camera device according to the invention, and

[0048] Fig. 3 is a schematic representation of a glass forming machine.

[0049] Figure 1 shows a longitudinal section through a first embodiment of the camera device 1 according to the invention, which can be used, for example, in a glass forming machine, such as an IS machine, at different stations or sections. The camera device 1 has a camera 2, which is, for example, a CMOS camera. A lens 3 can be arranged in the camera 2 or separately from it. The camera 2 can have a blocking filter F for the visible spectrum, so that, for example, only radiation with wavelengths above 750, 800, 850 or nm is detected, in order to make a near infrared range visible in particular. A lens system 4 arranged upstream of the lens 3 in the direction of an object 6 is also part of the camera device 1 according to the invention, wherein the lens system 4 is designed, for example, in a manner known per se as a two-lens system in order to correct a spectrum.However, three-lens lens systems 4 or other lens systems 4 can also be used. The lens system 4 can be configured as an achromat.

[0050] The lens system 4 is adjoined by an insert part 12 with an inner cone 13. This has an inner side 16 and an outer side 17. The insert part 12 further has a substantially cylindrical end section 15, which is arranged at a radial distance from the inner cone 13 and in particular from a corresponding cone opening 27. Between the cylindrical end section 15 and the inner cone 13, an annular space is formed, into which at least one air outlet 14 opens. This outlet discharges a compressed air flow in the direction of a subsequent diaphragm 5 (see also Figure 2), and a corresponding sealing air flow 7. The air outlet 14 can also be substantially annular and formed at the connection point between the inner cone 13 and the cylindrical end section 15. The sealing air flow 7 (see Figure 2) is directed towards a diaphragm opening 8 of the diaphragm 5 and exits through it towards the object 6.

[0051] In addition, Figure 1 essentially shows a beam path 29 which has a maximum constriction point 28 in the region of the aperture 8, i.e., the entrance pupil E of the lens system 4. This means that the corresponding aperture 5 is arranged such that the aperture 8 is associated with this maximum constriction point 28. The corresponding object 6 can be part of a station or section of the glass forming machine or a glass object to be produced by the glass forming machine, such as a glass container or the like.

[0052] The camera device 1 is connected to an evaluation device 25 for transmitting data or receiving control commands.

[0053] The special arrangement of aperture 5 with aperture opening 8 prevents dirt from the area of ​​object 6 from entering the direction of lens system 4 or camera 2 with lens 3. It also provides protection against the temperatures prevailing in a corresponding glass forming machine. Contamination would arise, for example, from cyclical lubrication processes of molds in a glass forming machine, during which clouds of oily vapors rise, which can condense on all components in the corresponding machine and also on the camera device. However, the combination of aperture 5 with aperture opening 8 and the support of the sealing air flow 7 prevents dirt from entering the direction of lens system 4 or camera 2.

[0054] The aperture 8 can be selected large enough to not reduce the amount of light passing through the aperture 5, or to reduce it only slightly (i.e., by a maximum of 10% or even only by a maximum of 5%). Thanks to its placement at or near the entrance pupil E of the lens system 4, the aperture 8 can simultaneously be small enough to prevent, or at least significantly reduce, the penetration of dirt into the interior of the camera device 1 or onto the lens system 4.

[0055] The various components of the camera device 1 can be arranged at a variable distance, see for example the distance 10 in Figure 1 or corresponding distances in Figure 2, which can be adjusted for example by arranging one or more intermediate rings 11.

[0056] The exemplary embodiment of the camera device 1 according to Figure 1 has a relatively long overall length, since all corresponding parts of the camera device are arranged one behind the other in the direction of the object 6. In order to reduce this length, a device housing 9 associated with the camera device 1 (see Figure 2) can have a first receiving section 18 and a receiving section 19, which are arranged parallel to one another and directly next to one another. The first and second receiving sections 18, 19 are connected to one another via a deflection section 20 of the device housing 9. Parts of the camera device are arranged in each of the receiving sections 18, 19, see, for example, camera 2 and lens 3 in the first receiving section 18 and lens system 4, insert part 12 and aperture 5 in the second receiving section 19.The deflection section 20 has at least two deflection walls 21 and 22, which are arranged substantially at right angles to each other and are mirrored on their inner side or have mirrors 23, 24.

[0057] The device housing 9 can be pivoted, for example mounted on a mounting plate 30.

[0058] In order to vary the distance (see, for example, distance 10) between the various parts of the camera device, one or more intermediate rings 11 can be arranged between the individual parts. This distance variation allows the camera device 1 to be adapted to different shooting situations, see, for example, "wide angle" or "zoom" or corresponding intermediate ranges.

[0059] Figure 2 shows a plurality of air outlets 14, which are arranged at a distance from one another approximately in the circumferential direction of the insert part 12 outside the inner cone 13. Compressed air flows through these outlets as a sealing air stream toward the aperture 8 of the aperture 5. In this embodiment, the aperture 5 is designed as a pinhole. The corresponding sealing air stream exits the camera device 1 through the aperture 8 toward the object 6.

[0060] By arranging and positioning the aperture opening 8 in conjunction with the sealing air flow 7, contaminants occurring within the glass forming machine are largely prevented from entering the camera device 1 or at least through the aperture 5 toward the lens system and the like. In this context, the corresponding direction of the sealing air flow is determined not only by the arrangement and orientation of the air outlets 14, but also by the annular space between the outer side 27 of the inner cone 13 and the inner side of the cylindrical end section 15.

[0061] The compressed air forming the sealing air flow 7 can additionally be used to cool the interior of the camera device 1, in particular the camera 2 and other electrical and electronic devices within the device housing 9. To supply the compressed air to the device housing 9, the latter has a corresponding compressed air connection 26.

[0062] Figure 2 further shows that the (optional) blocking filter F can be arranged, for example, between camera 2 and lens 3, or that the blocking filter F can be arranged on the optical entrance side of lens 3, for example, screwed onto lens 3. Both Figures 1 and 2 show a longitudinal section through the camera device 1 according to the invention, which can have a corresponding side wall in the direction of the viewer, which is part of the device housing 9 and covers all parts inside the device housing 9. A corresponding side wall is also provided, for example in Figure 2 adjacent to the mounting plate 30.

[0063] At least one camera device 1 according to the invention can be arranged in a corresponding glass forming machine. The camera of the camera device can be used, for example, to determine the temperature of the corresponding object or of other parts in sections or stations of the glass forming machine. Generally, a corresponding CMOS camera can be used in the visible spectral range, although measurements into the near infrared range are also possible. If the camera is to be used only for this near infrared range, a corresponding blocking filter for the visible spectrum is used, for example, which only allows a range above 750, 800, 850 or more nm to pass through, up to the end of the camera's sensitivity. This largely eliminates the influence of visible light and captures radiation in the near infrared range.This is sufficient for the use of the camera device according to the invention, since it makes temperatures above 350°C measurable, for example.

[0064] The aperture 5 and the sealing air flow 7 prevent dirt or other contaminants from penetrating the lens system and camera, even without actual shielding, such as a glass surface or the like. At the same time, the sealing air flow 7 and the compressed air it generates enable cooling of the camera device 1.

[0065] It is possible to arrange several of the camera devices 1 according to the invention in different sections or stations of a glass forming machine, such as an IS machine. This makes it possible to record certain parameters or other information during glass production, such as the temperature of the mouth tools for dispensing glass gobs, the temperature of the molding tools, the temperature of the pressing rams, the speed of the incoming glass gobs, the length of the incoming glass gobs, the temporal offset of the glass gobs from one another or the movement sequence of the molding tools and, of course, the temperature of the glass gobs. Furthermore, it is possible to record other parameters or information, such as the adhesion of glass to the molding tools, crash conditions in the mold, for example, stuck glass gobs, the failure of a transfer mechanism of the molding tools, and the like.It is also possible to combine camera devices 1 according to the invention for the near infrared range and for the visible spectral range.

[0066] Figure 3 schematically shows a glass forming machine 100, for example, a so-called "IS machine" (IS: individual section). The glass forming machine 100 has a preform side 101 and a final forming side 102. In the preform side 101, glass containers (e.g., bottles) are preformed, then transported to the final forming side 102, where they are completely formed before being transported away by a downstream conveyor belt 103. The glass forming machine 100 has several sections arranged parallel to one another, in the illustrated embodiment, a total of eight sections S1 to S8. However, glass forming machines 100 with fewer or more sections are also conceivable. Each section S1 to S8 comprises a preform side 101 and a final forming side 102.At least one camera device 1 can be present in at least one, in several or even in all sections S1 to S8, namely in the preform side 101 and / or in the finished form side 102.

[0067] The various camera devices 1 within the glass forming machine can be arranged offset and / or inclined relative to one another in such a way that even if double, triple, or quadruple gobs occur at a station of an IS machine, all of these gobs and their corresponding parameters, as well as the forming tools and other information, can be captured. One example would be the use of two camera devices per section or station of such an IS machine. Furthermore, the camera devices 1 can also be used during the discharge and further transport of corresponding glass containers from or to the corresponding glass forming machine, for example, to determine whether certain glass containers have defects in order to sort them out if necessary.

[0068] The camera device 1 according to the invention thus serves to secure and reproducibly record information or parameters in the glass forming machine, wherein the corresponding data can be fed to the evaluation device 25 in order to influence, for example, control options of the glass forming machine with regard to day / night changes, changes in air humidity, cooling processes in the glass forming machine, or the like. Individual sections or stations of the corresponding glass forming machine can also be shut down in an emergency, such as in the event of a crash or the like. The recorded information or parameters can also be evaluated to determine whether a corresponding glass container is faulty or inadequate, for example if significant temperature differences occurred in the forming tools, additional glass adheres to the container, or the like.In addition, the corresponding information and parameters can be archived for process traceability and it is also possible to control the camera device 1 according to the invention from the evaluation device 25.

Claims

Claims Camera device (1) for a glass forming machine with a camera (2), an objective (3) and a lens system (4), characterized in that the lens system (4) defines an entrance pupil (E) on its side facing away from the objective (3), that the camera device (1) has a diaphragm (5) between the lens system (4) and the object (6), and that a blocking air flow (7) is directed away from the lens system (4) through a diaphragm opening (8) of the diaphragm (5). Camera device according to claim 1, characterized in that the objective (3) is arranged between the camera (2) and the lens system (4). Camera device according to one of the preceding claims, characterized in that the distance between the entrance pupil (E) and the lens system (4) is from 40 mm to 150 mm, preferably from 50 mm to 80 mm.Camera device according to one of the preceding claims, characterized in that the camera device (1) has a device housing (9) in which at least the camera (2), objective (3), lens system (4), and aperture (5) are arranged. Camera device according to one of the preceding claims, characterized in that a distance (10) between the camera (2) and objective (3) and / or between the objective (3) and lens system (4) and / or between the lens system (4) and aperture (5) is variable. Camera device according to claim 5, characterized in that the distance (10) can be varied by arranging one or more intermediate rings (11) in the device housing (9). Camera device according to one of the preceding claims, characterized in that an insert part (12) with an inner cone (13) is arranged between the lens system (4) and aperture (5), wherein an inner side (16) of the inner cone (13) is preferably optically neutral.Camera device according to one of the preceding claims, characterized in that the insert part (12) has at least one air outlet (14) directed substantially in the direction of the aperture opening (8). Camera device according to one of the preceding claims, characterized in that a number of air outlets (14) are formed spaced apart from one another in the circumferential direction of the insert part (12). Camera device according to one of the preceding claims, characterized in that the at least one air outlet (14) is formed between the outer side (17) of the inner cone (13) and a substantially cylindrical end portion (15) of the insert part (12). Camera device according to one of the preceding claims, characterized in that the aperture (5) is a pinhole aperture.Camera device according to one of the preceding claims, characterized in that the device housing (9) has first and second, substantially parallel receiving sections (18, 19) and a deflection section (20) connecting them, wherein at least the camera (2) and lens (3) are arranged in the first receiving section (18), and at least the lens system (4), insert part (12), and aperture (5) are arranged in the second receiving section (19). Camera device according to one of the preceding claims, characterized in that the deflection section (20) has at least two deflection walls (21, 22) arranged substantially at right angles to one another and mirrored on the inside. Camera device according to one of the preceding claims, characterized in that all parts of the camera device (1) are detachably fastened in the device housing (9) and are variable in their position and mutual spacing.Camera device according to one of the preceding claims, characterized in that the camera (2) is a camera sensitive in at least the near infrared range. Camera device according to one of the preceding claims, characterized in that the camera (2) is a CMOS camera with, in particular, a blocking filter (F) for the essentially visible spectrum. Camera device according to one of the preceding claims, characterized in that the device housing (9) is pivotably mounted. Camera device according to one of the preceding claims, characterized in that the aperture (8) is variable in its opening area and / or opening shape. Camera device according to one of the preceding claims, characterized in that the camera (2) is connected to an evaluation device (25). Camera device according to one of the preceding claims, characterized in that the device housing (9) has a compressed air connection (26). Camera device according to one of the preceding claims, characterized in that the blocking air flow (7) can be used as a cooling air flow inside the device housing and in particular for cooling the camera (2) or other electrical / electronic devices in the device housing (9) before exiting through the aperture (5). Glass forming machine (100) with one or more camera devices (1) according to one of the preceding claims.

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