Lighting fixture for a light box used for geometric dimensioning and tolerancing analysis of an object

Abstract

A lighting fixture (40) for a light box (10) used for geometric dimensioning and tolerancing analysis of an object (70) located within said light box (10), comprising: a fixture body (41) configured to be mounted within the light box (10); a first array (42) of first controllable light sources (43) disposed at a first area (44) on the fixture body (41), the first array (42) comprising a first linear polarizing filter; and a second array (46) of second controllable light sources (47) disposed at a second area (48) on the fixture body (41) different from the first area (44), the second array (46) comprising a second linear polarizing filter, wherein the linear polarizing filters are oriented orthogonally relative to one another to enable cross-polarization of light emitted from the first and second controllable light sources (43, 47).

Description

The present invention generally relates to geometric dimensioning and tolerancing analysis. More particularly, the present invention relates to a lighting fixture for a light box used for geometric dimensioning and tolerancing analysis of an object.BACKGROUNDIn the quest to achieve Industry 4.0 and the realization of the Factory of the Future, there has been a push towards the incorporation of comprehensive automation, not only in in-line production processes but also in applications that require flexibility for non-in-line procedures. Such advanced manufacturing environments necessitate swift, cost-efficient, and precise geometric dimensioning and tolerancing (GD&T) techniques to ensure the quality and effectiveness of the production workflow. The ability to inspect a wide array of objects is therefore desired. The objects can include manufacturing parts (such as automotive components, aerospace parts, electronics, medical devices, and consumer goods), architectural materials (like stone, wood, and composites), agricultural products (including grains, seeds, and fruits), or practically any type of inspectable matter.In GD&T analysis, lighting illuminates the object under examination thoroughly, ensuring that all details, including minute imperfections, are distinctly visible. Obtaining a sufficiently apt visibility is crucial for conducting precise and definitive assessments. However, conventional lighting solutions often fall short in delivering this level of illumination uniformly across at desired portions of the object. These solutions frequently produce inconsistent lighting that can lead to shadows and uneven highlights, thus distorting the actual appearance of the object and masking essential features. Moreover, prior art solutions often necessitate reliance on auxiliary technologies such as advanced camera systems and sophisticated image processing software. These technologies are employed to compensate for poor lighting by artificially enhancing the image quality through adjustments in brightness, contrast, and sharpness, and by filtering out visual noise. While effective to a degree, this approach introduces additional layers of complexity and significantly increases the cost of the setup. Moreover, these enhancements can only mitigate, not eliminate, the fundamental issues caused by inadequate lighting, leading to potential inaccuracies in the analysis.It is in light of the observations above that the present inventor has come up with an innovative design of a lighting fixture for a light box that seeks to address these shortcoming of the prior art.SUMMARYConsidering the contents of the background section, the present inventor has made valuable technical insights to solve or at least mitigate one or more of the challenges referred to in the previous section. These insights will be presented as inventive aspects in the detailed description section and the drawings. The list of inventive aspects is not to be seen as exhaustive but rather a summary of particularly beneficial inventive aspects. Generally, all terms used herein are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein.The present disclosure concerns a lighting fixture design for a light box used for GD&T analysis, which enhances the capabilities of photogrammetry and similar techniques for GD&T analysis. The lighting fixture is designed to be operable in light boxes handling manual in-line processes, manual non-in-line processes, automatic inline processes, automatic non-in-line processes, or any hybrids of the afore processes.In a first inventive aspect there is provided a lighting fixture for a light box used for GD&T analysis of an object located within said light box, comprising: a fixture body configured to be mounted within the light box; a first array of first controllable light sources disposed at a first area on the fixture body, the first array comprising a first linear polarizing filter; and a second array of second controllable light sources disposed at a second area on the fixture body different from the first area, the second array comprising a second linear polarizing filter, wherein the linear polarizing filters are oriented orthogonally relative to one another to enable cross-polarization of light emitted from the first and second controllable light sources.The first aspect of the disclosure may seek to enhance the quality and precision of GD&T analysis by ensuring uniform and controlled illumination that reduces glare and enhances contrast through the use of orthogonally oriented polarizing filters for effective cross-polarization. The first aspect may enhance lighting within the light box for GD&T analysis by incorporating dual arrays of light sources with orthogonal polarizing filters to enable cross-polarization. This setup addresses and mitigates common issues of uneven lighting found in traditional solutions, which may reduce the dependency on expensive camera equipment and complex image processing algorithms.The orthogonal orientation of the filters can ensure even illumination across the object and reduce shadows and highlights that can obscure details. This may not only simplify the operational setup, making it more cost-effective and less reliant on digital enhancements, but may also allow for precise control over lighting conditions to suit various analytical needs.In some embodiments, the linear polarizing filters are comprised in a respective cover portion of a cover adapted to cover each of the arrays. A technical advantage may include enhanced protection and integration of polarizing filters directly with the light sources, facilitating precise polarization control.In some embodiments, the first and second areas are arranged at a front portion of the fixture body facing an interior environment of the light box. A technical advantage may include improved positioning for direct illumination within the light box, improving light effectiveness for GD&T analysis.In some embodiments, the first array comprises a first sub-array and a second sub-array being disposed at respective fixture body protrusions extending outwards from the fixture body, the first sub-array and the second sub-array facing one another, and the second array comprises a first sub-array and a second sub-array being disposed at respective fixture body protrusions extending outwards from the fixture body, the first sub-array and the second sub-array facing one another. A technical advantage may include enhanced directional lighting control, enabling focused light interactions for detailed illumination tasks, and also an improved space utilization on the lighting fixture.In some embodiments, the lighting fixture further comprises a controllable actuator disposed at the fixture body, wherein the controllable actuator is arranged to cause movement of the first and second arrays in relation to one another. A technical advantage may include dynamic adjustability of light positioning, enhancing lighting flexibility for varying analysis requirements.In some embodiments, the controllable actuator comprises a first actuator element arranged to cause movement of the first array, and a second actuator element arranged to cause movement of the second array. A technical advantage may include independent control of each array’s position, allowing for customized light settings per array.In some embodiments, the actuator elements are disposed in a plurality of sections in between the first and second arrays. A technical advantage may include structured placement of actuators for balanced mechanical support and precise movement control.In some embodiments, the controllable actuator is a magnet. A technical advantage may include smooth, contactless adjustment of arrays, reducing mechanical wear and enhancing reliability.In some embodiments, the lighting fixture comprises a substantially circular shape, the first and second arrays being disposed in respective symmetrical configurations that are substantially concentric. A technical advantage may include uniform light distribution from a central point which is desirable for even illumination across the objects.In some embodiments, the lighting fixture further comprises a third array of third controllable light sources, wherein the third array is disposed in a substantially concentric configuration at a third area on the fixture body different from the first and second areas, and wherein the third array is configured to generate a cloudy day light environment simulation. A technical advantage may include the addition of specialized lighting conditions that mimic natural light, enhancing visual analysis capabilities, and also an improved space utilization on the lighting fixture.In some embodiments, the third array comprises a first sub-array and a second sub-array being disposed at respective fixture body protrusions extending outwards from the fixture body, the first sub-array and the second sub-array facing one another. A technical advantage may include targeted light enhancements from fixture points, supporting detailed inspection requirements.In some embodiments, the third area is an inner concentric area of the fixture body, the first or second area is a middle concentric area of the fixture body, and the second or first area different from the middle concentric area is an outer concentric area of the fixture body. A technical advantage may include organized light source placement for layered lighting effects, improving depth and detail perception and improving space utilization on the lighting fixture.In some embodiments, the lighting fixture further comprises a controller mounted to a rear portion of the fixture body, wherein the controller is configured to control light emission of the controllable light sources. A technical advantage may include centralized management of lighting settings, simplifying operational complexity.In some embodiments, the controller is further configured to control a relative movement of the first and second arrays. A technical advantage may include integrated control over both light emission and physical positioning, enhancing precision in lighting adjustments.In some embodiments, the lighting fixture further comprises an auxiliary controllable light source different from other controllable light sources of the lighting fixture, the auxiliary controllable light source being capable of producing light at a higher intensity compared to the other controllable light sources of the lighting fixture. A technical advantage may include the provision of supplementary high-intensity lighting when needed, accommodating diverse analytical conditions.In some embodiments, a light box for GD&T analysis of an object located within said light box is provided. The light box comprises a flexible door member movable between an open position and a closed position for opening and closing a front portion of the light box, wherein the flexible door member in the open position is arranged to fold in a space accommodated by the light box, and the flexible door member in the closed position is arranged to enclose the interior of the light box from an external environment; and the lighting fixture of the first aspect. A technical advantage may include enhanced accessibility and secure enclosure of the interior environment, improving conditions for GD&T analysis.In some embodiments, the space is accommodated between a ceiling portion of the light box and at least one support member mounted to an upper portion of the light box. A technical advantage may include efficient use of internal space, allowing for additional installations like lighting or mechanical components without compromising the functional area.In some embodiments, the light box comprises an upper sheet laterally mounted below the at least one support member; a robotized arm mounted to the upper sheet via a mounting plate and extending into the interior of the light box, wherein the robotized arm carries at least one camera sensor adapted to capture one or more images of the object located within the light box; and a modular light panel system mounted at interior surfaces of the light box, at least one portion of the modular light panel system comprising an aperture through which the robotized arm is received. A technical advantage may include integrated automation and imaging capabilities, enhancing the precision and efficiency of the analysis process.In some embodiments, the modular light panel system comprises a plurality of interconnectable light panel units configured to illuminate the object, each light panel unit comprising a control unit and a controllable light source, wherein the control unit for each light panel unit is configured to control light emission of the associated controllable light source for said each light panel unit; and a light diffuser film arranged to cover the controllable light sources to cause distribution of the light emission into an interior environment of the light box where the object is located. A technical advantage may include uniform and controlled lighting, desirable for accurate visual analysis of the object’s condition.In some embodiments, the light box further comprises a plurality of lighting fixtures at least mounted to comers portions of the light box. A technical advantage may include improved illumination coverage, ensuring no area within the light box is underlit, thus supporting thorough and consistent GD&T analysis.Other aspects, objectives, features and advantages of the inventive aspects will appear from the following detailed disclosure as well as from the claims and the drawings. Generally, all terms used herein are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein.It should be emphasized that the term “comprises / comprising” when used in this specification is taken to specify the presence of stated features, integers, steps, or components, but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof. All terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a / an / the [element, device, component, means, step, etc.]" are to be interpreted openly as referring to at least one instance of the element, device, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.Expressions like “[something] is configured for... [performing activity]” or “[something] is configured to ... [perform activity]” will include typical cases where a computerized “something” (having one or more controllers, processing units, programmable circuitry, etc.) executes software or firmware installed in the computerized “something”, wherein the execution occurs in order to perform the activity in question.BRIEF DESCRIPTION OF THE DRAWINGSThe foregoing will be apparent from the following more particular description of the example embodiments, as illustrated in the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the example embodiments.FIG. 1 shows a perspective view of a light box in which a modular light panel system can be employed according to one example.FIG. 2 is a schematic side-view illustration of a light box in which a modular light panel system can be employed according to one example where a diffuser film is not shown.FIG. 3 is a schematic side-view illustration of a light box in which a modular light panel system can be employed according to one example where a diffuser film is shown.FIG. 4 is a schematic side-view illustration of a light box in which a modular light panel system can be employed according to one example where a diffuser film and a plurality of lighting fixtures are shown.FIG. 5 is a schematic front-view illustration of an interior of a lighting fixture according to one example with a fixture body and two arrays of controllable light sources.FIG. 6 is a schematic front- view illustration of an interior of a lighting fixture according to one example with a fixture body and three arrays of controllable light sources.FIG. 7 is a schematic front-view illustration of an interior of a lighting fixture according to one example with a fixture body, two arrays of controllable light sources, and an auxiliary controllable light source.FIG. 8 is a schematic front-view illustration of an interior of a lighting fixture according to one example with a fixture body, three arrays of controllable light sources, and an auxiliary controllable light source.FIG. 9A is a schematic perspective view of an interior of a lighting fixture according to one example with a fixture body and sub-arrays of controllable light sources.FIG. 9B is a schematic front view of the example of FIG. 9A.FIG. 9C is a schematic rear view of the example of FIG. 9AFIG. 10A is a schematic perspective view of a lighting fixture with a cover and an attachment mechanism according to one example.FIG. 10B is a schematic front view of the example of FIG. 10A.FIG. 10C is a schematic rear view of the example of FIG. 10A.FIG. 11A is a schematic side view of an attachment mechanism and controller of a lighting fixture according to one example.FIG. 11B is a schematic upper view of the example of FIG. 11A.FIG. 11C is a schematic perspective view of the exemplary attachment member shown in FIGs. 11A-B.FIGs. 12A-D shows exemplary views of a lighting fixture housing according to an example.DETAILED DESCRIPTION OF EMBODIMENTSInventive aspects and embodiments of the invention will now be described with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. The terminology used in the detailed description of the particular embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like reference signs refer to like elements.FIG. 1 shows an exemplary light box 10 in which some of the inventive concepts of the present disclosure may be employed. In contexts of the present disclosure, the light box 10 is used for conducting GD&T analysis of an object 70. GD&T is a system used in engineering and manufacturing to define and communicate the geometry of parts and assemblies, including objects and surfaces thereof. GD&T provides a comprehensive framework for specifying allowable variations in the form, orientation, and location of features, ensuring that parts fit and function together as intended. GD&T uses a standardized symbolic language to convey design intent and tolerances, improving precision, consistency, and quality in the production process, and also facilitates better communication among design, engineering, and manufacturing teams. The light box 10 therefore provides a controlled environment for this analysis.The GD&T analysis performed within the light box 10 may involve a variety of techniques. For instance, it could involve visual inspection, where the object 70 is examined under the controlled lighting conditions provided by the light box 10.Techniques such as spectrophotometry or colorimetry could also be used, where the light reflected from the object 70 is measured to derive information about its properties. Furthermore, the light box 10 could accommodate more advanced techniques such as laser scanning or 3D imaging, which can provide detailed topography information. However, it should be noted that the specific techniques used for GD&T analysis within the light box 10 are not limited to the examples given here. On the contrary, the light box 10 can accommodate a wide range of techniques, and the specific technique(s) used will depend on the requirements of the specific application.The GD&T analysis is not limited to be performed on any type of particular object 70, spanning multiple industries and applications. The versatility and adaptability of the light box 10 and the employed GD&T analysis methods can make it a valuable tool for quality control, research, and many other purposes. While one object 70 is shown in the figure, it shall be understood that one or more objects 70 can be positioned within the light box 10 for joint or sequential GD&T analysis.In a manufacturing context, this could include automotive components such as engine parts, body panels, or tires, where GD&T analysis could reveal defects or irregularities. Similarly, aerospace parts such as turbine blades, fuselage panels, or electrical wiring could be inspected to ensure they meet stringent quality and safety standards. Electronics, including circuit boards, semiconductor devices, or display panels, can also be inspected using the light box 10, with GD&T analysis providing valuable insights into their manufacturing quality and potential for failure. Medical devices, such as surgical instruments, implants, or diagnostic equipment, can similarly be inspected to ensure their properties meet the necessary standards. Furthermore, consumer goods ranging from home appliances to personal care products can be inspected using the light box 10, ensuring their quality and safety for the end user. Architectural materials including stone, wood, and composites can be inspected using the light box 10. For instance, the condition of a stone slab could be analyzed to detect cracks, chips, or variations in color and texture. Similarly, wood and composite materials can be inspected for irregularities, defects, or signs of wear and tear. In the agricultural sector, the light box 10 could be used to inspect a variety of products such as grains, seeds, and fruits. For example, the condition of grains and seeds could be analyzed to detect signs of disease, insect damage, or other quality issues. Fruits could be inspected for ripeness, damage, or disease based on their properties. In addition, other types of inspectable matter could be evaluated using the light box 10. These could include geological samples (such as rocks, minerals, or soil), biological samples (like tissues, cells, or microorganisms), or even artifacts and artworks for conservation purposes.The light box 10 shown in FIG. 1 has a generally cubic shape. However, this shall not be construed as limiting to the scope of the light box 10. In alternative examples the light box 10 may involve any suitable size or dimensions, and can be constructed with arbitrary lengths, widths, and heights, depending on the objects 70 it is accommodating. The dimensions of the light box 10 could range from small sizes suitable for tiny components, such as a small cogwheel or the like, to much larger sizes designed for bigger objects, even up to several meters in length, such as 1 meter, 10 meters, or more, such as an airplane wing or the like. While a rectangular or cubic shape might be common due to ease of construction and use, other shapes like cuboids, prisms, or cylinders are also possible. The choice of shape can depend on the specific requirements of the objects 70 being analyzed and the space available for the equipment.The light box 10 can be designed as a standalone unit into which objects are manually placed and removed for inspection. This setup can be suitable for objects that require careful handling or precise positioning within the light box 10. Alternatively, the light box 10 can be integrated into an automated handling system. For example, it can be mounted on or integrated with a conveyor belt system, making it part of a production line. In such setups, objects can continuously enter and exit the light box 10 without the need for manual intervention, facilitating rapid and efficient inspections of numerous items. Any hybrids of the afore can also be realized.The light box 10 can be relatively small and transportable, meaning that can be useful in the field or in situations where space is limited, such as in small workshops or at archaeological sites. The light box 10 can also be medium-sized, such as adapted to sit on a station or the like for analysis, suitable for research and development environments or quality control labs. The light box 10 can also be used in large-scale productions, for example integrated into manufacturing lines, such as in automotive or electronics factories, where parts can be inspected in sequence as they move along a production line.The exemplary light box 10 shown in FIG. 1 includes a front portion 11, a ceiling portion 12, two side portions 13-1 (and the opposing side not explicitly shown), and a rear portion 14. It shall be understood that the front portion 11 may alternatively be understood as the rear portion 14, and vice versa. The light box 10 may also include a floor portion not further referenced herein. Note however that the floor portion is optional since the light box 10 can be e.g. placed atop of an object without the floor portion present. These portions are interconnected to one another, together forming the outer boundaries of the light box 10. Moreover, an upper portion 15 is shown, which can include the ceiling portion 12 as well as upper areas of the respective portions 11, 13, 14. For example, the upper portion 15 may correspond to the upper 10% or 20% of the areas of the respective portions 11, 13, 14.The light box 10 comprises a door member 30. The door member 30 serves as an access point, which can be moved between an open and a closed position. In the open position access to the interior of the light box 10 is enabled, for example by inserting one or more objects 70. In the closed position access to the interior of the light box 10 is prohibited. The door member 30 may be moved between one or more intermediary positions in between the open position and the closed position, i.e., being partly closed or partly open.The door member 30 may be flexible, enabling it to fold and unfold as needed, can be important in operations of the light box 10 for multiple purposes. The door member 30, when open, folds compactly within a designated space 16 inside the light box 10. This use of space can be especially important in cramped industrial settings or in other environments where space is limited. The compact folding thanks to the flexible properties of the door member 30 does not compromise the functionality of the light box 10, allowing for the full volume of the light box 10 to be utilized for GD&T analysis when the door member 30 is closed. In the closed position, the door member 30 effectively seals off the interior of the light box 10 from influences of an external environment. The external environment is “external” in the sense that it is the environment outside of the light box 10, as opposed to an interior environment 80. Hence, a controlled environment within the light box 10 can be enabled, which is often necessary for accurate and consistent GD&T analysis. Further, the door member 30 may prevent intrusion of dust, external light, or other environmental factors that could potentially interfere with the analysis.The door member 30 may be formed using materials inherently possessing flexibility, such as rubber, flexible plastics, or certain types of fabric. These materials allow the door member 30 to bend or fold without damage. In preferred examples, the door member 30 consists of a synthetic elastomer material. Available synthetic elastomers that can be used for the door member 30 include but are not limited to chlorosulfonated polyethylene (CSPE) (also known as Hypalon ®), ethylene propylene diene monomer (EPDM) rubber, neoprene, polyvinyl chloride (PVC), to name a few examples. One or more of these synthetic elastomers can be used in combination with one another, involving different material compositions as suitable for the application area. The door member 30 and the material used therefor preferably possess not only the flexibility, but also durability (resistant of degradation due to e.g. environmental challenges over time), a lightweight property (for performance improvements), thermal stability (especially in production environments where severe conditions can prevail), etc.The door member 30 may include an exterior side facing the external environment. The exterior side may include the flexible material, such as the synthetic elastomer as discussed above. This makes it durable against external influences such as environmental factors, wear and tear, damages, high temperatures, or the like.The door member 30 may include an interior side, which faces the interior environment 80. The interior side may be covered by a light diffuser material. The light diffuser material may be integrated with the interior side, and / or be provided as a separate sheet affixed to the interior side. The light diffuser material may cover the entirety of the interior side when the door member 30 is in the closed position, or at least significant portions thereof (e.g. some screws, hinges, marks, labels, etc., can possibly be uncovered). The more of the area of the interior side is being covered the more advantageous for the performance of the GD&T analysis.The light diffuser material is designed to scatter light, spreading it evenly across a given area, in this the object 70. This scattering effect helps to soften the light, reduce glare, and distribute the light more uniformly. For purposes of GD&T analyses, light diffusers enables a controlled lighting environment to e.g. reduce shadows and hot spots that could impair visual inspection or automated sensing systems. The light diffuser material on the interior side may therefore ensure that the object 70 is illuminated evenly, which can be important for accurate measurement and assessment. Uneven lighting can create shadows or glare that might mask or exaggerate certain features, leading to incorrect conclusions about the condition or quality of the object being analyzed.The light scattering properties of the diffuser material are what allow it to distribute light evenly. Light scattering involves the reflection, refraction, and diffraction of light rays when they hit the diffuser material, redirecting these rays in multiple directions. This process reduces the intensity of direct light beams and spreads them out across a wider area. The light diffuser material may be selected based on diffusion efficiency, transmission efficiency, haze and / or clarity. The diffusion efficiency determines how well the material spreads light, quantifiable by measuring the angular distribution of light intensity. The transmission efficiency determines the percentage of light that passes through the diffuser material, which affects the overall brightness inside the light box. The haze and clarity parameters measure the cloudiness and the clearness of the diffuser material, influencing how sharp or soft the light appears.By selecting the appropriate light diffuser material and applying it to the interior side, the light box 10 can achieve improved lighting conditions for GD&T analysis. Light diffuser materials that may be used involve cloth materials (muslin cloth or silk), polymers (such as polycarbonate, acrylic (PMMA), methacrylate, and silicone rubber), or the like.In some alternative examples, the flexible door member 30 could include multiple rigid segments connected by flexible joints or hinges that allow them to fold relative to each other, thus making the door member 30 flexible. For door members made from rigid sections, hinges or flexible joints can be used. These alternative designs can be similar to overhead sectional doors, roll-up doors, or industrial folding doors commonly used in the industry.In some alternative examples, the door member 30 can be any other suitable door types known in the art, i.e., not necessarily one that folds in a designated space. By way of example, the door member 30 can be a door member of a swing door system, sliding door system, revolving door system, or the like.As seen in FIG. 1, the door member 30 in the open position is arranged to fold in a space 16 accommodated by the light box 10. The space 16 may be accommodated inside outer boundaries of the light box 10. Thanks to this feature, a space efficient solution can be provided. The accommodation of the space 16 is therefore a deliberate design choice that the present inventor has found to be particularly useful in contexts of light boxes used for GD&T analysis.In this example the space 16 is accommodated between the ceiling portion 12 of the light box 10 and at least one support member 17 mounted to the upper portion 15 of the light box 10. Since the upper portion 15 can include upper areas of the respective portions 11, 13, 14, or the ceiling, the at least one support member 17 can be mounted thereto. In this example, eight support members 17 (the leftmost one is concealed in the illustration) are mounted to the upper portion 15 via fasteners. In other examples not shown herein, the space 16 may be accommodated at the side portion 13-1 (or the opposing side not explicitly shown in FIG. 1) of the light box 10. In these other examples, corresponding support members can be realized as well.The door member 30 in the open position is supported by the support members 17. Depending on the position of the door member 30, i.e., how far it has been folded up, a different number of support members 17 can contribute to the support. As seen in the illustration, the door member 30 is partly open, and three support members 17 are contributing for support.The support members 17 serve as structural reinforcement, helping to maintain the integrity and stability of the light box 10. The support members 17 may be rollers for enabling a folding movement of the door member 30. Essentially, when the door member 30 is moved to the open or closed position, it wraps around or unwraps from the rollers. This design can allow for smooth operation of the door, making it easy to manage while also saving space, as the door can be compactly stored when opened. Other exemplary support members 17 (and optionally the rollers) may be solid beams or adjustable / modular supports.The door member 30 may be driven by a motorized drive unit adapted to drive the door member 30 between the open and closed positions, although the present disclosure may also be applicable for other types of operations of the door member 30, such as manual driving via a lever or the like.The light box 10 may further include a modular light panel system 31 arranged in the light box 10. The modular light panel system 31 comprises a plurality of individual light panel units 32 that can be interconnected to form a customizable lighting arrangement within the light box 10. The modularity aspect is particularly useful because it offers flexibility and scalability in configuring the lighting environment to suit specific requirements for GD&T analysis of different objects 70, different light boxes 10, different operational scenarios, or the like. Furthermore, the modularity allows the modular light panel system 31 to be easily expanded or reconfigured according to e.g. various sizes and shapes of the light box 10 or the specific needs of the objects 70 being analyzed. For instance, additional light panel units 32 can be added to increase brightness or to cover a larger area, or the configuration can be altered to focus more light on specific sections of the object 70.The light panel units 32 are individual components that can be interconnected to form a cohesive and customizable lighting arrangement within the light box 10. Each light panel unit 32 includes its own control unit and controllable light source. The control unit for each light panel unit 32 is configured to control light emission of the associated controllable light source, i.e., the controllable light source arranged at the same light panel unit 32 as the control unit. This may allow for precise adjustments in light emission.In this example, the light panel units 32 are generally square in shape, which can facilitate easy alignment and connectivity between adjacent light panel units 32.However, the design of these light panel units 32 is not necessarily restricted to square shapes; they can come in various geometrical configurations to suit different design requirements and functionalities. Possible shapes include triangular, circular, and rectangular forms, among others. This versatility in shape allows the modular light panel system 31 to be adapted to the specific contours and dimensions of the light box 10 or to the particular requirements of the object 70 being analyzed.Additionally, the size and width of these light panel units 32 can vary. The dimensions are primarily determined by the size of the light box 10 and the nature of the objects 70 under analysis. Larger light panel units 32 might be used to cover more extensive areas uniformly, while smaller light panel units 32 could be beneficial for focusing on intricate details or for use in smaller light boxes 10. The ability to choose from various sizes and shapes can enhance the flexibility of the modular light panel system 31, making it possible to create a tailored lighting environment that can be improved for any given application. Based on the considerations discussed above, this also brings about the fact that a light box 10 may include any number of light panel units 32.In some examples, each light panel unit 32 is disconnectable from the other light panel units 32 of the modular light panel system 31. Upon disconnection, only the disconnected light panel unit 32 ceases illumination. The term “disconnectable” implies that each light panel unit 32 can be individually removed or detached from the modular light panel system 31 without the need to dismantle or disrupt the entire lighting setup. This functionality can be beneficial for troubleshooting, maintenance, or when altering the lighting configuration to suit different analytical needs or to accommodate various sizes and shapes of objects within the light box 10. Upon disconnection, only the specific light panel unit 32 that has been detached ceases to illuminate. This localized control can prevent a complete system shutdown when one light panel unit 32 is removed, thereby maintaining continuous operation of the remaining modular light panel system 31. This can be important in environments where consistent lighting is necessary to avoid interruptions in the analysis process. The disconnectable property may be facilitated by different types of connectors or fastening systems that allow for quick release and reattachment of the panels. Such connectors can include magnetic connectors, snap-fit mechanisms, or plug-and-play electrical interfaces, which can be employed to facilitate easy and rapid disconnection and reconnection of a light panel unit 32.In some examples, the plurality of interconnectable light panel units 32 are arranged to cover all interior surfaces of the light box 10, except for surface(s) of the door member 30. This coverage can ensure that the light is uniformly distributed within the light box 10, reducing shadows and enhancing the illumination of the object 70 from a plurality of angles. The exclusion of the door member 30 from this arrangement is logical since the door member 30 may need to be opened and closed frequently, and integrating light panels into the door could complicate the door’s mechanics and reliability. Moreover, by not including the door member 30 in the panel coverage, the design allows for the door to function without interfering with the lighting system or risking damage to the light panel units 32 during door operation. However, since the door member 30 preferably is flexible and includes a light diffuser material, as discussed above, these examples may function in an advantageous synergy with one another.The light panel units 32 can be customized to fit the specific contours and dimensions of the interior of the light box 10. For instance, curved panels might be used for rounded comers, or flexible LED strips could be employed to conform to irregular shapes. The adaptability in the shape and size of the light panels can aid in achieving comprehensive coverage without gaps, ensuring that a large portion of, if not all, areas within the light box 10 are well-lit.In some examples, the light emission control involves a generation of a cloudy day light environment simulation within the light box 10. The cloudy day light environment simulation comprises a predetermined color temperature used for subsequent GD&T analysis of said object 70. This specific setting is used to create a uniform and diffused lighting condition that closely mimics natural light on an overcast day, which is known for its soft and shadow-free illumination. A “cloudy day light environment simulation” thus refers to the artificial reproduction of the lighting conditions typically found during an overcast day. Technically, this involves configuring the light emission to match the color temperature commonly associated with cloudy weather. This color temperature is cooler and considered “whiter” than the warmer tones produced on sunny days. The term “simulation” in this context means creating an artificial lighting environment within the light box 10 that replicates the natural light conditions of a cloudy day. This is achieved through electronic and optical components of the light system, more specifically by control of the controllable light sources, as the outputs therefrom may be adjusted to a specified color temperature, or a range of color temperatures. The simulation is controlled via the control unit (and optionally via master control from control circuitry as will be discussed in the example of FIG. 2 later on) that can tune the spectrum of emitted light to achieve the desired effect. Simulating a cloudy day light environment may be particularly beneficial for GD&T analysis for several reasons involving for example uniform lighting, color accuracy and reduced glare.The predetermined color temperature referred to above may be higher than that of direct sunlight. Direct sunlight generally has a color temperature around 5000K. By setting the color temperature in the range of 5000K to 7500K, more preferably towards 5000K to 6000K, even more preferably between 5310K to 5800K, and most preferably at approximately 5600K, the simulation aims to replicate the cool, diffuse light characteristic of an overcast day. The broader range of 5000K to 7500K may allow for a cooler light that is closer to typical daylight but with the potential to reach the cooler tones of a cloudy day. The narrower range of 5000K to 6000K focuses more specifically on a typical “cloudy day” light, which may provide a good balance between the brightness and diffusion needed to reduce shadows and glare. The even more narrow range of 5310K to 5800K is closely aligned with the natural light conditions on an overcast day, which may be beneficial for critical visual inspections where precise color rendering and uniform lighting are necessary. However, the present inventor has identified that 5600K, or optionally a few of tenths of degrees in any direction of this value, can serve as the most preferable color temperature selection for object inspections in light boxes.With reference to FIG. 2, a schematic side-view illustration of an exemplary light box 10 in which a modular light panel system 31 can be employed is shown. This light box 10 may correspond to the light box 10 of FIG. 1. As seen in the illustration, the light box 10 includes several additional components not shown in FIG. 1, the first one being an upper sheet 18. The upper sheet 18 is laterally mounted below the at least one support member 17. The inclusion of the upper sheet 18 serves multiple functional purposes, which may enhance both the usability and the effectiveness of the light box 10 in conducting GD&T analysis.Firstly, the upper sheet 18 may act as a protective barrier within the interior of the light box 10. Positioned below the support members 17, the space 16 where the door member 30 is supported while in the open position, and the ceiling portion 12, as well possibly any other mechanical or electronic units (such as linkages, transmissions, control systems, etc.), it can prevent dirt, dust, and other particulates from falling onto the object 50 of analysis located below. This helps for maintaining a clean environment inside the light box 10, which can be particularly useful in sensitive applications such as quality control in manufacturing or scientific research.Secondly, the upper sheet 18 can play a role in creating a more controlled lighting environment. By covering the support members 17 and other overhead components, it can provide a continuous surface that can be utilized to mount light panel units or other lighting elements. This setup may allow for the even distribution of light across the interior of the light box, eliminating shadows or uneven lighting that could interfere with the imaging or analysis processes.Thirdly, the upper sheet 18 can also contribute to the overall integrity and stiffness of the light box 10. By connecting various parts within the upper portion 15 of the light box 10, it can help in maintaining the alignment and positioning of the internal components, which may enhance the durability and lifespan of the light box 10.Fourthly, the installation of the upper sheet 18 may allow for easy access to the components it covers for maintenance purposes, possibly incorporating hinges, sliding mechanisms, or the like.The choice of material for the upper sheet 18 may typically depend on its specific functions. Transparent or translucent materials such as frosted acrylic or polycarbonate might be used if light diffusion is a priority, while more opaque materials could be selected for improved protection against contamination.Further seen in the illustration is a robotized arm 19. The robotized arm 19 is mounted to the upper sheet 18 of the light box 10 via a mounting plate 20, and extends into the interior environment 80 of the light box 10. The primary function of the robotized arm 19 is to carry and control the movement of at least one camera sensor 21. The camera sensor 21 is typically a camera or a part thereof, but may include any other imaging sensing technology known in the art. The camera sensor 21 is adapted to capture one or more images of the object 70 located within the light box 10. The automation provided by the robotized arm 19 may allow for dynamic and precise positioning of the camera sensor 21, enabling it to capture images from various angles and / or positions. Hence, the robotized arm 19 and its functionality may be important for comprehensive GD&T analysis, as it can ensure that all aspects of the object 70 can be examined without the need for manual adjustment of either the object 70 or the camera sensor 21.The robotized arm 19 may offer flexibility in how images are captured, as it may adjust the distance and angle of the camera sensor 21 relative to the object, thus allowing the camera sensor 21 to capture high-quality images that accurately reflect the condition of the object 70. Moreover, by automating the image capture process, the robotized arm 19 can improve the efficiency and productivity of light box operations by enabling faster processing times as the camera sensor 21 can move to predetermined positions or respond to automated cues without manual intervention. This feature can be particularly beneficial in high-throughput environments where speed and accuracy are premiered.The mounting of the robotized arm 19 to the upper sheet 18 via the mounting plate 20 can provide a stable and secure attachment point. This setup can ensure that the robotized arm 19 remains steady during operation. The mounting plate 20 may also allow for potential adjustments in the positioning or orientation of the robotized arm 19 relative to the light box 10 and its interior, accommodating different sizes or types of objects being analyzed.Further seen in the illustration is the plurality of interconnected light panel units 32 that are mounted on interior surfaces of the light box 10. One of the light panel units 32 may include an aperture 23 for receiving the robotized arm 19, thus ensuring that the robotized arm 19 can be received and moved freely within the light box 10 without compromising the integrity of the lighting setup.In the example of FIG. 2, the light box 10 further comprises control circuitry 100, which can form part of a larger control system. The control circuitry 100 is responsible for managing one or more functions of the light box 10, for example the operation of the modular light panel system 31 and its light panel units 32 via the associated control units, the operation of the door member 30, the robotized arm 19 and its camera sensor 21, to name some examples. The control circuitry 100 can automate these components based on programmed routines or in response to sensory inputs.The control circuitry 100 may be implemented in any known controller technology, including but not limited to microcontroller, processor (e.g. PLC, CPU, DSP), FPGA, ASIC or any other suitable digital and / or analog circuitry capable of performing the intended functionality. The control circuitry 100 can vary in complexity, from simple manual controls to sophisticated programmable logic controllers such as the aforementioned, to larger industrial control systems overseeing a plant involving a plurality of light boxes 10.In addition to the control circuitry 100, the associated control system may comprise a memory associated with the control circuitry 100 which may be implemented in any known memory technology, including but not limited to E(E)PROM, S(D)RAM or flash memory. In some embodiments, the memory may be integrated with or internal to the control circuitry 100. The memory may store program instructions for execution by the control circuitry 100, as well as temporary and permanent data used by the control circuitry 100.The control system may further comprise a controller interface. The controller interface may be a simple interface with relatively simple interaction means for providing one or more instructions to the control circuitry 100. Some embodiments may also be realized wherein the controller interface can have more advanced configurations. The controller interface may be configured to include means for receiving instructions, and transmitting these instructions to the control circuitry 100. For instance, transceiver standards such as e.g. example GBIC, SFP, SFP+, QSFP, XFP, XAUI, CXP or CFP may be used. The controller interface may be configured to be compliant with communication standards such as e.g. GSM, UMTS, LTE, D-AMPS, CDMA2000, FOMA, TD-SCDMA, TCP / IP, Ethernet, Bluetooth, WiFi (e.g. IEEE 802.11, wireless LAN), Near Field Communication (NFC), RE-ID (Radio Frequency Identification), Infrared Data Association (IrDA), without limitation and in any combination.While not explicitly shown, the light box 10 may further comprise a sensor employed to monitor the external area of the light box 10, particularly near the front portion of the light box 10 in this example. Other variations can also be envisaged. The sensor can detect the presence and position of objects 70 as they approach the light box 10 via a conveyor 90, i.e., are located within a recognizable distance from the light box 10. The control circuitry 100 may thereby be prepared for their arrival and analysis. The sensor may be one or more of infrared sensors, weight sensors, vision-based sensors, radio-based sensors, ultrasonic sensors, capacitive sensors, magnetic sensors, or the like. The recognizable distance and sensitivity of these sensors can vary based on the technology and specific application needs, affecting how they are implemented in different environments.The conveyor 90 is used to transport one or more objects 70 into and out from the light box 10. Since this particular light box 10 includes one door member 30, the objects 70 are transported in and out from the same door member 30. Other examples may include two door members thus forming a tunnel-structure where objects enter from any of the front, side and rear portions 11, 13, 14 and exit from any of the front, side and rear portions 11, 13, 4), For example, when the object 70 reaches the location where the object 70 is located in the illustration, the door member 30 can close such that the analysis can be performed with respect to the object 70.The light box 10 may therefore be arranged in tandem with a conveyor 90 adapted to transport the objects 70 to and from the light box 10. The conveyor 90 can ensure a smooth and consistent flow of objects 70 into the light box 10 for inspection or analysis. The conveyor 90 may be one or more of belt conveyors, roller conveyors, robotic conveyors, pneumatic conveyors, screw conveyors, vibratory conveyors, chain conveyors, or the like. Each type of conveyor may offer unique advantages and is selected based on the specific requirements of the operation, such as the nature of the objects 70 being transported, the required speed of transport, and integration with other system components. The conveyor 90 may range in complexity from a simple belt to a more complex system with adjustable speeds, orientations, and even integrated sorting mechanisms.While the control circuitry 100, sensor, and conveyor 90 can improve the functionality and automation of the light box 10, they are optional features. Depending on the specific needs and constraints of the operational environment, these components can be included or excluded, one by one or jointly.In some examples, the control circuitry 100 may be configured to synchronize the light emission across multiple control units of the light panel units 32. The control circuitry 100 thus serves as a master controller in these examples. This synchronization ensures that the light panel units 32 operate in unison. The control circuitry 100 can coordinate the output from each light panel unit 32 via the respective control units, by for example parameters such as intensity, color temperature, and distribution to achieve uniform illumination. By centralizing the control, the modular light panel system 31 can be more reliable in its lighting setup, and can make it easier to manage and adjust according to specific requirements.The synchronization of light emission control may be based on an object template of the object 70 that undergoes or will undergo analysis. An object template refers to a predefined set of parameters that describe how the object 70 should be illuminated based on its specific attributes. This proactive approach may allow the modular light panel system 31 to automatically adjust the lighting settings to suit the particular characteristics of the object 70. For instance, if the object template indicates that the object has a highly reflective surface, the system can adjust to reduce glare and enhance the visibility of surface details.The object template may include one or more of a type, size, and surface characteristics. Including these aspects in the template can allow for a more nuanced control of the internal lighting environment 80. For example, larger objects 70 might require a broader light spread, while objects 70 with complex surface textures might benefit from varied angles of illumination to highlight intricate details. By integrating these specific characteristics into the control system, the light panel units 32 can dynamically adapt their output to meet the needs of each object 70, which may ensure an improved visibility and accordingly GD&T analysis.FIG. 3 is another schematic side-view illustration of an exemplary light box 10 in which a modular light panel system 31 can be employed. The difference between this illustration and the one shown in FIG. 2 is that another example is shown where a light diffuser film 33 is arranged cover the controllable light sources of the light panel units 32. Hence, distribution of the light emission into an interior environment 80 is thus caused.The light diffuser film 33 in the modular light panel system 31 can improve the quality of lighting within the light box 10, ensuring that the light emitted is evenly distributed across the interior environment 80.The light diffuser film 33 may be arranged directly over the controllable light sources. In some designs, the light diffuser film 33 might be integrated into the light panel unit 32 during manufacture, while in others, it could be attached as an overlay that can be replaced if necessary. The attachment method could involve adhesive bonding, mechanical fastening, magnetic attachment, or the like, depending on the design of the light panel unit and the desired ease of maintenance and replacement. By covering the controllable light sources, the light diffuser film 33 scatters the light emitted, transforming the focused beams into a softer, widespread glow. This diffusion eliminates harsh shadows and reduces glare, which can be important for accurately analyzing the conditions of the object 70 in the light box 10. The diffused light provides a uniform illumination that is essential for high-quality imaging and precise inspection.The light diffuser film 33 may include any type of known material typically used in light diffuser films, such as similar to those used to cover the interior side of the door member 30 as discussed above. To this end, the material of the light diffuser film 33 involve light scattering properties for uniform light distribution, involving the reflection, refraction, and diffraction of light rays from the controllable light sources when they hit the light diffuser film 33 to redirecting these rays in multiple directions. This process reduces the intensity of direct light beams and spreads them out across a wider area. The light diffuser material may be selected based on diffusion efficiency, transmission efficiency, haze and / or clarity. The diffusion efficiency determines how well the material spreads light, quantifiable by measuring the angular distribution of light intensity. The transmission efficiency determines the percentage of light that passes through the diffuser material, which affects the overall brightness inside the light box. The haze and clarity parameters measure the cloudiness and the clearness of the diffuser material, influencing how sharp or soft the light appears.By selecting the appropriate light diffuser material for the light diffuser film 33, the light box 10 can achieve improved lighting conditions for GD&T analysis. Light diffuser materials that may be used involve cloth materials (muslin cloth or silk), polymers (such as polycarbonate, acrylic (PMMA), methacrylate, and silicone rubber), or the like.FIG. 4 is another schematic side-view illustration of an exemplary light box 10. The difference between this illustration and the one shown in FIG. 3 is that the light box 10 comprises a lighting fixture 40, in this case 14 lighting fixtures 40. However, generally one or more lighting fixtures 40 can be comprised in the light box 10. Hence, the uniformity and control of lighting within the light box 10 can be enhanced even more for purposes of performing GD&T analysis.The lighting fixture 40 is arranged within the confines of the light box 10, for example at any internal surface of the light box 10 such as the interior of the portions 11, 13, 14. The lighting fixture 40 comprises a fixture body 41. The fixture body 41 is configured to be mounted within the light box 10. The exception is the door member 30, where mounting the fixture would be impractical due to the functionality of the door member 30 involving opening and closing, which could disrupt placement and operation of the lighting fixture 40. The flexible placement of the lighting fixture 40 allows the lighting environment to be customized according to specific lighting requirements and spatial configurations of the light box 10.In the displayed example, and also in the following examples of this disclosure, the lighting fixture 40 adopts a generally circular shape, which might be chosen for its ability to distribute light evenly from a central point. However, a wide range of sizes, shapes, dimensions, etc., can be envisaged in other examples, making the fixture adaptable to various applications and light box designs. Alternatives could include, but are not limited to rectangular or square shapes (which might fit better along the edges or comers of the light box 10), linear configurations (which may be useful for creating directional light or for placement along longer sides of the light box 10), or custom shapes (which can be designed to fit specific or unusual light box designs or to target light more effectively around the object 70). To this end, while the figures and examples here illustrate circular arrangements, this shall by no means be considered as a limiting feature.The materials from which the lighting fixture 40 is constructed can vary depending on the desired durability, weight, and optical properties. Common materials might include metals for robustness, plastics for lightweight needs, or composites that offer a balance of strength and weight. The choice of materials can also affect the fixture’s heat dissipation properties.FIG. 5 shows an interior of a lighting fixture 40 from a front view perspective. The lighting fixture 40 comprises a fixture body 41 and two arrays 42, 46 (first 44 and second 48 areas according to terminology used herein) involving respective (plurality of) controllable light sources 43, 47. A “controllable light source” refers to a lighting element, such as a LED, whose output characteristics, such as intensity, color temperature, or beam direction, can be adjusted or regulated, typically via an electronic control system, to adapt to specific lighting needs or conditions. In this example the array 42 is the outermost array of the fixture body 41 and the array 46 the middle array of the fixture body 41, however the opposite can alternatively be realized.The light sources 43, 47 may be disposed at respective areas 44, 48 (first 44 and second 48 areas according to terminology used herein) on the fixture body 41, in this case on the front portion 53 of the fixture body 41 facing the interior environment 80 of the light box 10. The areas 44, 48 are different as indicated by the figure. The disposal of the light sources 43, 47 can be random or in a certain configuration, such as in a group, scattered with a given distribution ratio, having a certain asymmetric or symmetric configuration, or the like. In this example the light sources 43, 47 are generally concentric given that the general shape of the lighting fixture 40 is circular, but variations may be realized for light sources 43, 47 disposed at lighting fixtures not being generally circular.A “concentric symmetric configuration” of light sources 43, 47 refers to an arrangement where the light sources 43, 47 are positioned in concentric circles or rings around a central point, with each ring of light sources 43, 47 being symmetrically spaced around this center. This configuration may ensure that the light emitted from each source is evenly distributed, creating a balanced illumination pattern that radiates outward from the center. In this case, the rings shown in FIG. 5 therefore represent the respective arrays 42, 46. This configuration can be understood as one where the light sources 43, 47 are symmetrically and uniformly placed along one or more concentric paths, which can be circular, oval, or any closed-loop shape. Hence, for any light source 42, 46 on a given ring, there is typically an identical light sources 43, 47 at an equal angular interval from a defined reference point (typically the center) on the same ring. The concentric symmetric configuration of light sources 43, 47 is designed for its ability to provide balanced, uniform lighting that can be beneficial for GD&T analysis.The light sources 43, 47 within each array 42, 46 can be spaced apart by arbitrary distances to suit specific lighting requirements. Any spacing may be used, such as 10 mm, and it can be based on the desired intensity and distribution of light across the object 70 under analysis. The spacing may vary at different portions of the arrays 42, 46.Each array 42, 46 includes a respective linear polarizing filter. These filters are used to modify the light emitted from the light sources 43, 47 by allowing only light waves aligned in certain directions to pass through. A linear polarizing filter achieves this by absorbing light waves that are not aligned with its polarization axis, which is the direction in which the filter allows light to pass. In some examples there is one linear polarizing filter per array 43, 46. In other examples there are multiple linear polarizing filters per array 43, 46, for instance one linear polarizing filter serving as an optical element for each light source 43, 47.The linear polarizing filters are oriented orthogonally relative to one another such that cross-polarization of light emitted from the light sources 43, 47 is enabled. The concept of cross-polarization thereby comes into play with the orthogonal orientation of the linear polarizing filters associated with each array 42, 46. Being “orthogonally oriented” means that the polarization axes of the two linear polarizing filters are generally perpendicular to each other. For example, if one filter allows only vertical light waves to pass through, the other would only allow horizontal waves, and vice versa. This orthogonal arrangement may enhance the contrast and quality of the resulting light by reducing unwanted reflections and glare. Cross-polarization, facilitated by this orthogonal orientation, refers to the phenomenon where two polarized light beams with perpendicular polarization directions interact. In practical applications within the light box 10, this means that light from each array 42, 46 is distinctly manipulated by its respective linear polarizing filter, and when combined, properties of the emitted light are such that it can enhance the visibility of certain features or details on the object 70 being analyzed. This is because cross-polarization can help in distinguishing features based on their light-reflecting characteristics, which might otherwise be obscured under standard lighting conditions.Any type of known linear polarizing filters can be employed, such as those made from polyvinyl, polyethylene terephthalate (PET), triacetyl cellulose (TAC), nematic liquid crystals, K Film (Kodak polymers), nanoparticle-based filters, or the like. Some specific exemplary linear polarizing filters may include sheet polarizers, wire grid polarizers, crystal polarizers, polymer polarizers, etc. An exemplary linear polarizing filter will be discussed in more detail later on in this disclosure with reference to FIGs.10A-C.In some examples, a reflector element may be arranged at either one or both of the first 44 and second areas 48. The reflector element can be positioned in conjunction with one or more of the respective controllable light sources 43, 47, such as adjacent to or “behind” them. Technically, “behind” refers to the placement of the reflector element on the opposite side of the plane defined by the light-emitting surface of the controllable light sources 43, 47, relative to the direction of light emission. The reflector element can be mounted directly onto the fixture body 41 or onto a backing structure that supports the light sources 43, 47. This positioning can ensure that the reflector element is oriented to intercept light that would otherwise be emitted away from the desired direction, redirecting it forward to enhance the overall light output. By positioning the reflector element behind the light sources 43, 47, the light emitted from these sources 43, 47 can be redirected and concentrated towards the target area, e.g. the object 70. This setup can increase the effective brightness and uniformity of the light, reducing wastage of light that would otherwise disperse in undesired directions. Reflector elements can also help in shaping the light beam, focusing it more narrowly or spreading it more widely, depending on the specific requirements of the GD&T analysis.The reflector element can vary in shape and material. Shapes may include parabolic, elliptical, or planar reflector elements, each designed to focus or scatter light in specific ways. The materials used for reflector elements may be reflective, such as polished aluminum, silver-coated surfaces, or specialized reflective polymers, which can improve the reflection efficiency.In FIG. 6, this example further includes a third array 50 of controllable light sources 51. These are disposed in a substantially concentric configuration at a third area 52, the third area being different from the first 44 and second 48 areas. In this example the third array 50 is the innermost array of the fixture body 41. Therefore, the shown configuration includes a lighting fixture 40 where the third area 52 is an inner concentric area of the fixture body 41, the first or second area 44, 48 is a middle concentric area of the fixture body 41, and the second or first area 48, 44 different from the middle concentric area is an outer concentric area of the fixture body 41. While this may be a preferred configuration, it shall not be construed as limiting. On the contrary, any of the arrays 42, 46, 50 can be arranged at any of the concentric rings.The third array 50, more specifically its light sources 51, are configured for generating a cloudy day light environment simulation. This may be done using similar approaches as discussed herein with regards to the cloudy day light environment simulation produced by the light panel units 32. To this end, the embodiments, variations and / or examples discussed with reference thereto applies also here (such as the color temperatures used, etc.). Advantageously, the arrangement of the third array 50 can therefore improve lighting conditions for the GD&T analysis additionally. As discussed above, the third array 50 can be arranged at any concentric ring. However, positioning the third array 50 in the innermost concentric ring may offer some technical advantages, as the placement can ensure foundational, uniform illumination across the object, reducing shadows and reducing glare for more accurate GD&T analysis.Similar to the first and second areas 44, 48, the third area 52 may also include a reflector element.Another example is shown in FIG. 7. This lighting fixture 40 includes an auxiliary controllable light source 58 that is different from the other controllable light sources 43, 47 of the lighting fixture 40. The auxiliary light source 58 is capable of producing light at a higher intensity compared to the other light sources 43, 47 of the lighting fixture 40. The auxiliary light source 58 thus serve as an element that boosts the overall lighting production of the lighting fixture 40, which may be needed for the GD&T analysis of some objects 70, including but not limited to highly reflective materials, complex geometries, dark or absorbent surfaces, color critical applications, etc.The auxiliary light source 58 may strategically be positioned generally at a central location within the lighting fixture 40. The placement is considered to ensure that its more intense light effectively integrates with the light from the other light sources 43, 47, enhancing the overall illumination without creating undue glare or shadows. The higher intensity of the auxiliary light source 58 can be achieved through the use of more powerful LEDs or other light-emitting elements that are capable of producing a greater lumens output compared to the standard elements used in the other arrays. The auxiliary light source 58 may include a separate control unit associated with for precise adjustments of its output, enabling it to be dimmed or brightened according to the specific requirements of the GD&T analysis. The auxiliary light source 58 may be equipped with specialized optical elements such as lenses or reflectors (for example including similar properties and features as the reflector elements discussed herein) that focus or diffuse the light as needed.The example of FIG. 8 is a combination of the examples of FIG. 6 and FIG. 7, offering advantageous effects from both the third array 50 and from the auxiliary light source 58.In some examples, the lighting fixture 40 may include more than three arrays, such as any suitable number (for example 4, 5, 8, 10, 15, or even more) required by the configuration and operational settings of the lighting box 10. At least two of these four or more arrays involve the linear polarization filters and related perpendicular orientation, as discussed herein.The examples of FIGs. 5-8, as well as other examples in the following parts of the present disclosure, may be complemented with a controllable actuator disposed at the fixture body 41. The controllable actuator is arranged to cause movement of the first and second arrays 42, 46 in relation to one another, i.e., to manipulate the position or orientation of the first and second arrays 42, 46 relative to each other. A “controllable actuator” refers to a device capable of causing mechanical motion controlled by electrical signals. Including such an actuator can be useful for adjusting lighting angles and intensities to maintain the desired lighting effects, such as ensuring effective crosspolarization by precisely aligning the polarizing filters associated with each array 42, 46.The controllable actuator may include a first actuator element arranged to cause movement of the first array 42, and a second actuator element arranged to cause movement of the second array 46. It may also include a third actuator element arranged to cause movement of the third array 50 in examples where it is used. This configuration can allow for independent control over each array’s 42, 46, 50 positioning, enhancing the ability to fine-tune the lighting setup for improved illumination and maintaining the polarization properties for specific analytical needs.The actuator elements may be disposed in a plurality of sections in between the first and second arrays 42, 46. These sections serve to distribute the actuation mechanisms evenly, which may ensure smooth and balanced movement of each array 42, 46, 50. This setup can also prevent any torsional stress or misalignment, which could disrupt the uniformity of light distribution or the effectiveness of the polarization filters.The controllable actuator may be a magnet. Magnets can be advantageous in actuation systems due to their ability to provide smooth, controlled movements without physical contact, reducing wear and tear on mechanical components. Magnetic actuators can be particularly effective in maintaining precise alignments needed for optical systems like those in the lighting fixture 40, where the exact positioning of arrays 42, 46, 50 with light sources 43, 47, 51 and linear polarization filters can impact performance.While magnets offer specific benefits, other types of actuators can also be used depending on the requirements, including electric drive units, piezoelectric actuators, hydraulic or pneumatic actuators, etc.With reference to FIGs. 9A-C, another exemplary setup with arrays and light sources is shown. In these examples three arrays 42, 46, 50 are employed, but this setup may also be considered in configurations involving two of the arrays 42, 46. FIGs. 9A-C illustrate an exemplary lighting fixture 40 from perspective (FIG. 9A), front (FIG. 9B), and rear (FIG. 9C) views.A plurality of fixture body protrusions, specifically four 54-1, 54-2, 54-3, 54-4, are shown in this example. Examples with additional or fewer number of arrays may include different number of protrusions. The fixture body protrusions 54-1, 54-2, 54-3, 54-4 refer to parts of the fixture body 41 that extend outward. These are essentially physical extensions that emerge from the main fixture body 41. In some examples, the fixture body protrusions 54-1, 54-2, 54-3, 54-4 may extend in a generally perpendicular direction from the fixture body. The term “perpendicular” implies that these extensions jut out at a right angle to the main plane or surface of the fixture body 41. This perpendicular orientation may enable positioning of the light sources 43, 47, 51 in a way that improves their effectiveness and coverage within the interior environment 80 of the light box 10.As can be seen in FIGs. 9A-B, the light sources 43, 47, 51 are disposed on the fixture body protrusions 54-1, 54-2, 54-3, 54-4 in a way such that they generally face one another. The light sources 43 of the first array 42 are divided into two light source sets, the first set being disposed at an inner side (i.e., facing towards the center of the fixture body 41) of the first fixture body protrusion 54-1, and the second set being disposed at an outer side (i.e., facing away from the center of the fixture body 41) of the second fixture body protrusion 54-2. Hence, the two light source sets face one another. In a similar way, the light sources 47 of the second array 46 are divided into two light source sets, the first set being disposed at an inner side of the second fixture body protrusion 54-2, and the second set being disposed at an outer side of the third fixture body protrusion 54-3. Similarly, the light sources 51 of the third array 50 are divided into two light source sets, the first set being disposed at an inner side of the third fixture body protrusion 54-3, and the second set being disposed at an outer side of the fourth fixture body protrusion 54-4.The facing orientation discussed above is not arbitrary but is a deliberate design choice to enhance the lighting effects. By facing each other, the sub-arrays 42-1, 42-2; 46-1, 46-2; 50-1, 50-2 can create a more uniform and controlled lighting environment. This setup can be beneficial for producing evenly distributed light or for achieving specific lighting effects such as the aforementioned cross-polarization, where the interaction of light beams from opposite sides can enhance the visibility of textures and details.In the above-described examples of sub-arrays (for the first, second, and / or third areas 44, 48, 52), this configuration can allow for other arrangements of reflector elements as discussed herein. The fixture body protrusions 54-1, 54-2, 54-3 holding the sub-arrays of light sources, can offer unique opportunities for reflector element placement. Each protrusion can have a dedicated reflector element positioned behind its respective light sources. For instance, for the first sub-array 42-1 and the second subarray 42-2 on protrusions 54-1 and 54-2, reflector elements can be placed on the back side of the light sources mounted to these protrusions. Similarly, for the second array’s sub-arrays 46-1 and 46-2 on protrusions 54-2 and 54-3, reflector elements can be arranged behind these light sources. By positioning reflector elements on the protrusions 54, each sub-array can be individually adapted for directional lighting control. This can allow for precise focusing of light beams, which can be especially useful in applications requiring high-intensity spotlights or targeted illumination. The ability to direct light from multiple angles can enhance the overall lighting environment, improving visibility and detail detection in GD&T analysis.Alternatively, reflector elements can be placed at the base plate of the fixture body 41 itself, from where the protrusions extend (e.g. as in the exemplary reflector element arrangement of FIGs. 5-8). In this setup, the reflector elements are positioned to capture and redirect light that would otherwise be emitted towards the fixture body 41, enhancing the forward-directed light. This configuration can provide a more centralized and uniform reflection, complementing the light emitted directly by the sources 43, 47, 5 1 on the protrusions 54. It may also offer larger variety in shapes of the reflector element. For example, a parabolic reflector element can be bent to a greater extent compared to the examples where the light sources 43, 47, 51 are arranged there. This is due to the fact that there is more available space at the base plate of the fixture body 41 since there is no light sources arranged at that surface.FIGs. 10A-C illustrate an exemplary lighting fixture 40 from perspective (FIG.10A), front (FIG. 10B), and rear (FIG. 10C) views. The lighting fixture 40 includes a cover 59 and an attachment mechanism 60. The cover 59 is fitted over the internal components of the fixture body 41, including the arrays 42, 46, 50 of light sources 43, 47, 51. The cover 59 may be made of glass, and optionally adding an opacifier, such as bone ash, tin dioxide, fluorides, etc. One such exemplary material is polarized opal glass, which provides translucency for allowing light to pass without diffusing it, resulting in a soft glow with reduced glare.The linear polarizing filters as discussed herein may be comprised in the cover material. Thus, a cover portion 59-1 covering the first array 42 comprises the first linear polarizing filter that polarizes light in a horizontal or vertical direction. Similarly, a cover portion 59-2 covering the second array 46 comprises the second linear polarizing filter that polarizes light in the other direction compared to the polarization of the first linear polarizing filter. The cover 59 thus does not only serve as a protective barrier for the light sources 43, 47, 51, but also as a medium for light manipulation. This cover 59 is designed to incorporate linear polarizing filters directly into its structure. Each portion of the cover corresponding to different arrays 42, 46 of light sources 43, 47 has a distinct polarizing filter embedded within it. This integration ensures that the light emitted from each array 42, 46 is polarized upon passing through the cover 59, which may streamline the design and enhance the effectiveness of the polarization.In addition, the third array 50 may be covered by the cover 59 at cover portion 59-3 as well, but without the polarization properties since that is not the purpose of the third array 50. Instead, the cover portion 59-3 can function as a light diffuser material comprising, for example, any of the materials discussed herein.The attachment mechanism 60, along with a controller 56, will now be discussed in more detail with further reference to FIGs. 11 A-C in perspective (FIG. 11A), upper (FIG. 11B), and perspective (FIG. 11C) views.The lighting fixture 40 comprises the attachment mechanism 60, which is designed as an intermediary member between the fixture body 41 and the attachment location of the lighting fixture 40, typically an interior surface of the light box 10. The attachment mechanism is designed to be releasable, for example using any releasable fastening means such as a bayonet mount, pipe clamp or dovetail connection. While not explicitly shown, a cable cover, such as sliding dovetail, can be arranged over the cable shown in FIG. 11 A. The attachment mechanism 60 comprises a two-axis attachment member 61, further shown in FIG. 11C. The two-axis attachment member 61 connects to respective sides of a controller housing 62.The controller 56 is mounted to a rear portion 57 of the fixture body 41. More specifically, a controller housing 62 of the controller 56 is mounted to the rear portion 57. The controller 56 is configured to manage the control of the controllable light sources 43, 47, 51, more specifically the light emission thereof. This may be done similarly to how the control circuitry 100 is configured to control light emission of the controllable light sources of the light panel units 32 as discussed herein. To this end, the controller 56 may have similar structural and / or functional limitations as the examples relating to the control circuitry 100. The control may in some examples be effected by the control circuitry 100 as discussed herein, via intermediary control using the controller 56.In addition to the light sources 43, 47, 51, the controller 56 may in some examples be further configured to control a relative movement of the first and second arrays 42, 46, and optionally also the third array 50 (or any additional array). This may be done by control via the controllable actuators as discussed herein. For example, the controller 56 may be configured to control a first actuator element to rotate in a first direction and a second actuator element to rotate in a second direction opposite from the first direction. If the control is the same, i.e., the rotation is effected with the same magnitude in both directions, the cross-polarization can be maintained while changing other light properties, such as direction or intensity.The controller 56 can be accommodated in the controller housing 62, which is shown in various views according to the exemplary controller housing 62 of FIGs. 12A-D. FIGs. 12A-B show the controller housing 62 in perspective and front views, respectively, and FIGs. 12C-D show a controller housing cover 63 in perspective and front views, respectively.One exemplary connection of various components will now be discussed. As seen in FIG. 12D, three connection points are indicated at the controller housing cover 63. These may be used for connecting the controller housing cover 63 to the controller housing 62 at the three connection points best seen in FIG. 12B. Continuing in FIG. 12B, four connection points are indicated at the controller housing 62. These may be used for connecting the controller housing 62 to the rear portion 57 of the fixture body 41 at the four connection points best seen in FIG. 9C.The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.

Claims

1. A lighting fixture (40) for a light box (10) used for geometric dimensioning and tolerancing analysis of an object (70) located within said light box (10), comprising:a fixture body (41) configured to be mounted within the light box (10);a first array (42) of first controllable light sources (43) disposed at a first area (44) on the fixture body (41), the first array (42) comprising a first linear polarizing filter; anda second array (46) of second controllable light sources (47) disposed at a second area (48) on the fixture body (41) different from the first area (44), the second array (46) comprising a second linear polarizing filter,wherein the linear polarizing filters are oriented orthogonally relative to one another to enable cross-polarization of light emitted from the first and second controllable light sources (43, 47).

2. The lighting fixture (40) of claim 1, wherein the linear polarizing filters are comprised in a respective cover portion of a cover (59) adapted to cover each of the arrays (42, 46).

3. The lighting fixture (40) of claim 1 or 2, wherein the first and second areas (44, 48) are arranged at a front portion (53) of the fixture body (41) facing an interior environment (80) of the light box (10).

4. The lighting fixture (40) of any preceding claim, whereinthe first array (42) comprises a first sub-array (42-1) and a second sub-array (42-2) being disposed at respective fixture body protrusions (54-1, 54-2) extending outwards from the fixture body (41), the first sub-array (42-1) and the second sub-array (42-2) facing one another, andthe second array (46) comprises a first sub-array (46-1) and a second sub-array (46-2) being disposed at respective fixture body protrusions (54-3, 54-4) extending outwards from the fixture body (41), the first sub-array (46-1) and the second sub-array (46-2) facing one another.

5. The lighting fixture (40) of any preceding claim, further comprising a controllable actuator disposed at the fixture body (41), wherein the controllable actuator is arranged to cause movement of the first and second arrays (42, 46) in relation to one another.

6. The lighting fixture (40) of claim 5, wherein the controllable actuator comprises a first actuator element arranged to cause movement of the first array (42), and a second actuator element arranged to cause movement of the second array (46).

7. The lighting fixture (40) of any of claims 5-6, wherein the actuator elements are disposed in a plurality of sections in between the first and second arrays (42, 46).

8. The lighting fixture (40) of any of claims 5-7, wherein the controllable actuator is a magnet.

9. The lighting fixture (40) of claim any preceding claim, comprising a substantially circular shape, the first and second arrays (42, 46) being disposed in respective symmetrical configurations that are substantially concentric.

10. The lighting fixture (40) of claim 9, further comprising a third array (50) of third controllable light sources (51), wherein the third array (50) is disposed in a substantially concentric configuration at a third area (52) on the fixture body (41) different from the first and second areas (44, 48), and wherein the third array (50) is configured to generate a cloudy day light environment simulation.

11. The lighting fixture (40) of claim 10, wherein the third array (50) comprises a first sub-array (50-1) and a second sub-array (50-2) being disposed at respective fixture body protrusions (54-5, 54-6) extending outwards from the fixture body (41), the first sub-array (50-1) and the second sub-array (50-2) facing one another.

12. The lighting fixture (40) of any of claims 10-11, whereinthe third area (52) is an inner concentric area of the fixture body (41), the first or second area (44, 48) is a middle concentric area of the fixture body (41), andthe second or first area (48, 44) different from the middle concentric area is an outer concentric area of the fixture body (41).

13. The lighting fixture (40) of any preceding claim, further comprising a controller (56) mounted to a rear portion (57) of the fixture body (41), wherein the controller (56) is configured to control light emission of the controllable light sources (43, 47).

14. The lighting fixture (40) of claim 13, wherein the controller (56) is further configured to control a relative movement of the first and second arrays (42, 46).

15. The lighting fixture (40) of any preceding claim, further comprising an auxiliary controllable light source (58) different from other controllable light sources (43, 47, 51) of the lighting fixture (40), the auxiliary controllable light source (58) being capable of producing light at a higher intensity compared to the other controllable light sources (43, 47, 51) of the lighting fixture (40).

16. A light box (10) for geometric dimensioning and tolerancing analysis of an object (70) located within said light box (10), the light box (10) comprising:a flexible door member (30) movable between an open position and a closed position for opening and closing a front portion (11) of the light box (10), wherein the flexible door member (30) in the open position is arranged to fold in a space (16) accommodated by the light box (10), and the flexible door member (30) in the closed position is arranged to enclose the interior of the light box (10) from an external environment; andthe lighting fixture (40) of any of claims 1-15.

17. The light box (10) of claim 16, wherein the space (16) is accommodated between a ceiling portion (12) of the light box (10) and at least one support member (17) mounted to an upper portion (15) of the light box (10).

18. The light box (10) of claim 17, further comprising:an upper sheet (18) laterally mounted below the at least one support member (17);a robotized arm (19) mounted to the upper sheet (18) via a mounting plate (20) and extending into the interior of the light box (10), wherein the robotized arm (19) carries at least one camera sensor (21) adapted to capture one or more images of the object (70) located within the light box (10); anda modular light panel system (31) mounted at interior surfaces of the light box (10), at least one portion of the modular light panel system (31) comprising an aperture (23) through which the robotized arm (19) is received.

19. The light box (10) of claim 18, wherein the modular light panel system (31) comprises:a plurality of interconnectable light panel units (32) configured to illuminate the object (70), each light panel unit (32) comprising a control unit and a controllable light source, wherein the control unit for each light panel unit (32) is configured to control light emission of the associated controllable light source for said each light panel unit (32); anda light diffuser film (33) arranged to cover the controllable light sources to cause distribution of the light emission into an interior environment (80) of the light box (10) where the object (70) is located.

20. The light box (10) of any of claims 16-19, further comprising a plurality of lighting fixtures (40) at least mounted to comers portions of the light box (10).