Light box and method for geometric dimensioning and tolerancing analysis of an object

Abstract

A light box (10) for geometric dimensioning and tolerancing analysis of an object (50) 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 (60).

Description

The present invention generally relates to geometric dimensioning and tolerancing. More particularly, the present invention relates to a light box for geometric dimensioning and tolerancing analysis of an object. The present invention also relates to an associated method.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 automation, existing GD&T methods like laser scanning, fringe-based techniques, and 2D computer vision have faced challenges. These approaches have fallen short in delivering a holistic solution for analyzing the objects within both automated and manual manufacturing processes. Particularly, laser scanning and fringebased methods have not met a uniform standard of accuracy, making them less suitable for the exacting requirements of automated systems, as well as adaptable processes where manual intervention is still prevalent. Photogrammetry, along with 3D scanning, stand out as more advantageous method owing to its heightened accuracy. However, the deployment of these technologies in settings that necessitate both automated and manually adaptable operations has been obstructed by various issues. The procedures involved are often lengthy, expensive, and struggle to reach the necessary levels of precision at a consistent basis. This issue becomes especially critical in the context of Industry 4.0, where the rapidity and dependability of GD&T analyses are important for the efficiency of both automated and flexible manufacturing processes.It is in light of the observations above and others that the present inventor has come up with an innovative design of a light box that seeks to address the shortcoming of the prior art.SUMMARYThe present inventor has made valuable technical insights to solve or at least mitigate one or more of the challenges referred to in the background 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 light box having a flexible door member, the light box being used for GD&T analyses, which enhances the capabilities of photogrammetry or other techniques for GD&T analyses. The door member is designed to be operable in light boxes handling manual in-line processes, manual non-in-line processes, automatic in-line processes, automatic non-in-line processes, or any hybrids of the afore processes.In a first inventive aspect of the disclosure there is provided a light box for geometric dimensioning and tolerancing analysis of an object located within said light box, 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.The first aspect of the disclosure may seek to enhance the precision and reliability of GD&T analyses by ensuring a controlled internal environment free from external disturbances. A technical benefit may include improved space utilization within the light box due to the flexible door member that folds compactly, allowing for larger or multiple objects to be analyzed simultaneously. This setup can also simplify the operational process, thus reducing manual handling and potential for errors. The flexible door member, capable of moving between an open and closed position, plays an important role beyond just serving as a barrier for entry. When open, it folds compactly within a designated space inside the light box, improving the use of space without compromising functionality. In its closed position, the door effectively seals off the interior of the light box from external environmental influences, which may ensure improved internal conditions for accurate and consistent GD&T analyses. The advancements provided by this light box design according to the first aspect can support manufacturers in achieving precise GD&T analyses for the progress of automation technologies and the realization of Industry 4.0 and Factory of the Future objectives.In some embodiments, the space is accommodated inside outer boundaries of the light box. A technical advantage may include enhanced internal space utilization without expanding the external dimensions of the light box.In some embodiments, the flexible door member comprises an interior side facing the interior of the light box, the interior side being covered by a light diffuser material. A technical advantage may include improved light distribution inside the light box, enhancing the quality of GD&T analysis.In some embodiments, the flexible door member consists of a synthetic elastomer material. A technical advantage may include increased durability and flexibility of the door, facilitating smoother operations.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 improved internal space utilization and protection of the flexible door member.In some embodiments, the flexible door member in the open position is supported by the at least one support member. A technical advantage may include stability and reduced wear and tear on the door mechanism, enhancing the lifespan of the flexible door.In some embodiments, the at least one support member is a roller enabling a folding movement of the flexible door member. A technical advantage may include smoother and more efficient opening and closing transitions of the door.In some embodiments, the light box further comprises an upper sheet laterally mounted below the at least one support member. A technical advantage may include additional protection for components located below from dust or debris falling from the upper areas of the light box.In some embodiments, the light box further comprises 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. A technical advantage may include enhanced automation and precision in capturing images for analysis, reducing manual handling and potential for human error.In some embodiments, the light box further comprises a plurality of interconnected light panel units mounted at interior surfaces of the light box, at least one of said light panel units comprising an aperture through which the robotized arm is received. A technical advantage may include seamless integration of lighting and robotic components, ensuring consistent lighting while accommodating the movement of the robotic arm.In some embodiments, a leading edge of the flexible door member comprises a load element. A technical advantage may include improved sealing and alignment of the door when closed, enhancing the light box’s ability to maintain a controlled internal environment.In some embodiments, the light box further comprises at least one longitudinal rail attached to the front portion of the light box, the flexible door member being adapted to travel along said at least one longitudinal rail. A technical advantage may include smoother and more precise movement of the door, reducing friction and resistance during operations.In some embodiments, the space is accommodated along at least one side portion of the light box. A technical advantage may include better organization and utilization of the light box's internal space, allowing for additional equipment or storage options.In some embodiments, the flexible door member comprises a motorized drive unit adapted to drive the flexible door member between the open and closed positions. A technical advantage may include automated control of the door, enhancing operational efficiency and consistency.In some embodiments, the light box further comprises a second flexible door member movable between an open position and a closed position for opening and closing a rear portion of the light box, wherein the second flexible door member in the open position is arranged to fold in a space accommodated by the light box, and the second flexible door member in the closed position is arranged to enclose the interior of the light box from the external environment. A technical advantage may include enhanced functionality and versatility of the light box, facilitating a continuous flow of objects through the light box in assembly line processes.In some embodiments, the flexible door member and the second flexible door member are independently or mutually operable and arranged to fold in the same space or a different space accommodated by the light box. A technical advantage may include flexible operational modes, allowing for independent or synchronized operations based on specific process requirements.In some embodiments, the light box further comprises control circuitry configured to: obtain sensing data from a sensor being indicative of the object located within a recognizable distance from the light box, and control a closing or opening movement of the flexible door member, and optionally of a second flexible door member, based on the movement data. A technical advantage may include enhanced automation and responsiveness of the light box, allowing for adaptive operations based on real-time data inputs.In some embodiments, the light box is arranged in tandem with a conveyor adapted to transport the object to and from the light box. A technical advantage may include streamlined integration into production lines, enhancing the efficiency of the overall manufacturing or analysis process.In some embodiments, the light box further comprises a lighting fixture 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. A technical advantage may include an even illumination across the object with reduced shadows and highlighting of potentially obscure details.In a second inventive aspect there is provided a method for geometric dimensioning and tolerancing analysis of an object located within a light box, comprising: receiving the object from an external environment; closing a flexible door member such that the interior of the light box is enclosed from the external environment; capturing at least one image of the object while the object is located within the light box; opening the flexible door member such that the flexible door member folds in a space accommodated by the light box; and delivering the object from the light box to the external environment.A similar problem and technical advantages as were described in relation to the light box of the first inventive aspect may be envisaged.In some embodiments, one or more of the steps of the method of the second inventive aspect are carried out in response to computer control via control circuitry. A technical advantage may include enhanced precision and reliability in executing the steps due to the automated nature of the control, reducing human error and increasing consistency in the GD&T process. This automation can allow for seamless integration with other automated systems and real-time adjustments based on immediate data processing, improving overall workflow efficiency.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 where a flexible door member is in a partly closed position according to one example.FIG. 2A is a schematic side-view illustration of a light box where a flexible door member is in an open position according to one example.FIG. 2B corresponds to the example of FIG. 2A where the flexible door member has moved from the open position to a partly closed position.FIG. 2C corresponds to the example of FIGs. 2A-B where the flexible door member has moved from the open position to a closed position.FIG. 3 is a schematic side-view illustration of a light box having two flexible door members in partly closed positions according to one example.FIG. 4 is a schematic side-view illustration of an operational scenario involving one flexible door member according to one example.FIG. 5 is a schematic side-view illustration of an operational scenario involving two flexible door members according to one example.FIG. 6 is a schematic flowchart illustration of a method for GD&T analysis according to one 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 50. 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 50 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 50 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 analyses 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 pertaining to GD&T, 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 50, and may span multiple industries and applications. The versatility and adaptability of the light box 10 and the employed GD&T methods can make it a valuable tool for quality control, research, and many other purposes. While one object 50 is shown in the figure, it shall be understood that one or more objects 50 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 50 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 50 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 flexible door member 30 (hereinafter simply “door member 30”, for reasons of brevity). 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 50. 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 flexibility of the door member 30 enables it to fold and unfold as needed, which is 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 60. The external environment 60 is “external” in the sense that it is the environment outside of the light box 10. 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.In some alternative examples, the flexible door member 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.The door member 30 comprises an exterior side 32. The exterior side 32 faces the external environment 60. The exterior side 32 preferably includes 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 comprises an interior side 31, which faces the interior of the light box 10. In preferable examples, the interior side 31 is covered by a light diffuser material. The light diffuser material may be integrated with the interior side 31, and / or be provided as a separate sheet affixed to the interior side 31. The light diffuser material preferably covers the entirety of the interior side 31 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 31 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 case the object 50. This scattering effect helps to soften the light, reduce glare, and distribute the light more uniformly. For purposes of GD&T analysis, light diffusers enables a controlled lighting environment to e.g. minimize shadows and hot spots that could impair visual inspection or automated sensing systems. The light diffuser material on the interior side 31 may therefore ensure that the object 50 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 50 under analysis.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.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 as opposed to other type of doors such as swing doors, sliding doors, revolving doors, and also other folding door types that store the door member on top of the structure instead of within a structure as in the case for the space 16 of the light box 10. 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 further include a leading edge 33 having a load element 34. The leading edge 33 refers to the part of the door member 30 that is closest to the ground during the closing movement, essentially guiding the rest of the door member 30 as it moves to close the light box 10. The load element 34 attached to this leading edge 33 serves several functions. Primarily, it acts as a weight to ensure that the door member 30 closes smoothly and firmly. By adding mass to the bottom of the door member 30, the load element 34 helps maintain a straight, taut alignment of the door material as it moves, preventing it from folding improperly or swinging back due to light breezes or minor disturbances. It also prevents the light diffuser material from wrinkling during folding. Mounting the load element 34 to the leading edge 33 can be achieved through various methods depending on for example the design and material of the door member 30. For instance, if the door member 30 is made of a flexible fabric or polymer, the load element 34 might be sewn into a hem at the bottom of the door member 30, or it could be attached using adhesives, clips, or a channel system where the load element 34 slides into place. If the door is made of segments of harder materials, the load element 34 might be affixed using e.g. bolts or screws directly onto the leading edge 33.The door member 30 may further include a motorized drive unit 35 adapted to drive the door member 30 between the open and closed positions. This corresponds to a motorized operation of the door member 30, 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.In embodiments having motorized operation, the motorized drive unit 35 includes the electric motor as its core component. This motor is responsible for generating the necessary mechanical force to move the door. The rotational motion of the motor, however, needs to be converted into linear motion to effectively drive the door member 30 back and forth along a longitudinal rail 36. The longitudinal rail 36 may include a similar light diffuser material as the interior side 31 of the door member 30. Some applications also include two motorized drive units 35, one at a respective lateral end of the door member 30 and designed to drive the door member 30 back and forth along respective longitudinal rails 36. To achieve this conversion from rotational to linear motion, the motorized drive unit 35 may form part of an automatic door operator involving linkages and transmission mechanisms. The electric motor generates rotational motion. The motor can be of various types, such as a stepper motor for precise control of the movement, or a servo motor for more robust and faster operations. A transmission can include gears, belts, or chains. The transmission is used for adjusting the torque and speed generated by the motor to the levels appropriate for moving the door member 30. For instance, gears can reduce the speed but increase the force, making it easier to move the door smoothly and steadily. A linkage system translates the rotational motion from the transmission into linear motion. This can be done through mechanisms such as a rack and pinion, where a gear (pinion) engages a linear toothed bar (rack) to produce linear movement, or through a leadscrew mechanism where rotational motion of a threaded shaft causes a nut to move linearly along the shaft. The automatic door operator may further include a control system including control circuitry, which can be configured to receive input from sensors or a manual control interface. The control system can be configured manage the operation of the electric motor, ensuring that the door opens and closes to the desired positions at appropriate speeds.Reference is now made to FIGs. 2A-C, which shows schematic side-view illustrations of a light box 10 having a door member 30 according to someembodiments.As seen in the illustrations, 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 analyses.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 maximum protection against contamination. As soon will be discussed, the upper sheet 18 is preferably covered by light panel units 22, so it is not a requirement for the GD&T analysis that the upper sheet 18 acts as a light diffuser.Further seen in the illustrations are 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 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 50 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 50 can be examined without the need for manual adjustment of either the object 50 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 50. 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 illustrations are a plurality of interconnected light panel units 22 that are mounted on the interior surfaces of the light box 10. For illustrative purposes, the light panel units 22 of FIGs. 2A-C are only shown at the left interior side (attached to the interior of the rear portion 14) and at the top interior side (attached to the interior of the upper sheet 18). However, it shall be understood that the plurality of interconnected light panel units 22 may cover every internal surface of the light box 10, with the exception of an aperture 23 of one of the light panel units 22 where the robotized arm 19 is received, and the interior side 31 of the door member 30. The aperture 23 is designed to allow the passage of 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.The interconnected light panel units 22 provide a consistent and controlled lighting environment inside the light box 10. By mounting these panels on various interior surfaces, light can be distributed evenly throughout the light box 10, reducing shadows and glare that could interfere with GD&T analysis. The arrangement of interconnected light panel units 22 can allow for customizable lighting setups tailored to specific types of GD&T analyses. Depending on material, shape, and other characteristics of the object 50, the lighting can be adjusted to enhance the visibility of details or to highlight particular features for the GD&T analysis.The combination of the arrangement involving the plurality of light panel units 22 with a light diffuser material on the interior side 31 of the door member 30 in a light box 10 can offer desirable advantages for precision in GD&T analyses. Firstly, the light panel units 22 provide a uniform and controlled lighting environment for minimizing shadows and glare. When combined with the diffuser material on the door member 30, which evenly distributes and softens incoming light, this setup can ensure that the entire interior of the light box 10 is bathed in consistent, diffuse light. This uniformity can help to eliminate visual inconsistencies caused by uneven lighting. Additionally, this arrangement can enhance the overall aesthetic and functional quality of the light box 10, making it more effective and reliable for detailed inspections and analyses across various applications.In FIG. 2A, the door member 30 is in the open position. In this configuration, the door member 30 is fully retracted or folded away, possibly using a roller mechanism as discussed earlier. This open position allows unobstructed access to the interior of the light box 10, facilitating the placement or removal of the object 50 to be analyzed. The door member 30 may rest compactly in the space 16 and optionally fold against the ceiling portion 12, supported by the support members 17 to keep it tidy and out of the way.In FIG. 2B, the door member 30 is in the partly closed position. Here, the door member 30 is shown partially extended across the opening of the light box 10. This midway state could be facilitated by a motorized drive unit 35 as discussed above. The door member 30 starts to cover the interior of the light box 10, with the upper sheet 18 and the robotized arm 19 still visible but possibly beginning to be obscured from the perspective of the external environment 60. This position might be used during initial stages of analysis to begin adjusting the internal lighting and camera settings.In FIG. 2C, the door member 30 is in the closed position. The door member 30 is fully closed, meaning that the interior of the light box 10 is sealed from the external environment 60. The door member 30 extends completely across the entrance, and may engage with a frame of the light box 10 (although not explicitly shown) to form a lighttight seal. The support members 17, or at least one of them (the right-most member in the illustration) might assist in holding the door in this position, which can add an extra layer of stability and ensuring that the door member 30 stays flush against the light box 10. With the door closed, the robotized arm 19 equipped with the camera sensor 21 may operate fully within the controlled interior lighting environment, and may be facilitated by the uniform lighting provided by the interconnected light panel units 22 and / or the interior side 31 of the door member 30.Overall, FIGs. 2A-C demonstrate the transition of the door member 30 from fully open to fully closed, showcasing the mechanisms that might be involved in its operation and the roles of various components in maintaining the functionality and integrity of the internal environment of the light box 10.FIG. 3 shows a schematic side-view illustration of a light box having two flexible door members 30, 40 (the flexible door member 40 will hereinafter simply be referred to as “door member”, for reasons of brevity) in partly closed positions according to one example. Each one of the door members 30, 40 is respectively configured to control access from opposite ends of the box, namely at the front portion 11 and at the rear portion 14, effectively creating a tunnel-like structure. This design can be particularly advantageous for in-line processes where objects may enter and exit through different ends, thus facilitating continuous workflows. Both of the door members 30, 40 can operate independently or in coordination, depending on the needs of the process. Each door member 30, 40 is capable of moving between an open position, where it folds away compactly into a designated space 16 within the light box 10, and a closed position, where it seals the light box 10 from the external environment 60. The independent operation allows one of the door members 30, 40; 40, 30 to be opened while the other door member 40, 30; 30, 40 remains closed. This feature can be useful for processes where different stages of handling or analysis occur at different times. The mutual operable coordinates the movements of the door members 30, 40 for processes requiring synchronous opening and closing, which could be useful for maintaining controlled environments or for specific sequential operations.While this example shows the door members 30, 40 at the front and rear portions 11, 14, respectively, other examples may be envisaged where any of the side portions 13 can accommodate a door member 30, 40 as well. A tunnel-like structure may thus be envisaged where the objects 50 do not necessarily travel in a longitudinal direction across the light box 10, but can also enter the light box 10, turn 90 degrees to the left or right, and exit via a side portion 13. Vice versa applies as well, i.e., entering from a side portion 13 and exiting via any of the front or rear portions 11, 14, respectively.The door members 30, 40 can be folded into the same space 16, as illustrated in FIG. 3, for example by wrapping around one another or being stored parallel to each other as depicted in the figure. This makes up for an efficient use of space of the light box 10, which can be valuable in limited-space environments.The support members 17 may be designed to support both of the door members 30, 40, offering structural stability and guidance as the doors move. Alternatively, separate support member(s) 17, 41 may be provided for each door member 30, 40, which might be necessary if the flexible door members 30, 40 have different sizes, weights, or operational dynamics, for example.While not explicitly shown in FIG. 3, the second door member 40 may include similar or identical components to the first door member 30 as discussed herein, such as the longitudinal rail(s) 36, the motorized drive unit 35, the leading edge 33 with a load element 34, and so forth. This similarity in components can streamline the manufacturing process and maintenance procedures, and can ensure consistency in performance and appearance.This dual door configuration may allow the light box 10 to function seamlessly within production lines or testing environments where objects 50 need to pass through the light box 10 without unnecessary interruptions. The ability to independently or mutually operate the door members 30, 40 can enhance the flexibility of the light box 10, making it adaptable to a wide range of industrial applications. The shared or individual support structures 17, 41 and the potential for similar mechanical components across both the door members 30, 40 can ensure a cohesive and efficient design, promoting reliability and ease of use in various operational contexts.Reference is now made to FIG. 4, which illustrate an exemplary operational scenario of the light box 10. As seen in the figure, the light box 10 now highlights the application of a plurality of interconnected light panel units 22 covering the internal surfaces of the light box 10, as discussed above. This particular operational scenario of the light box 10 employs control circuitry 70, which can form part of the control system as discussed above. This scenario also employs a sensor 71 that monitors an external area of the light box 10 in the vicinity of the front portion 11 where one or more objects, in this example three 50-1, 50-2, 50-3, are received by transport via a conveyor 80.The control circuitry 70 is responsible for managing one or more functions of the light box 10, for example the operation of the light panel units 22, the operation of the door member(s) 30, 40, the robotized arm 19 and its camera sensor 21, to name some examples. The control circuitry 70 can automate these components based on programmed routines or in response to sensory inputs.The control circuitry 70 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 70 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 70, the associated control system may comprise a memory associated with the control circuitry 70 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 70. The memory may store program instructions for execution by the control circuitry 70, as well as temporary and permanent data used by the control circuitry 70.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 70. 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 70. 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.The sensor 71 is employed to monitor the external area of the light box 10, particularly near the front portion 11 in this example. Other variations can also be envisaged. The sensor 71 can detect the presence and position of objects 50 as they approach the light box 10, i.e., are located within a recognizable distance from the light box 10. The control circuitry 70 may thereby be prepared for their arrival and analysis. In this scenario, the sensor helps in coordinating the entry of objects 50-1, 50-2, 50-3, which are transported via the conveyor 80. The sensor 71 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 80 is used to transport one or more objects, in this case three objects 50-1, 50-2, 50-3, into and out from the light box 10. Since this particular light box 10 includes one door member 30, the objects 50-1, 50-2, 50-3 are transported in and out from the same door member 30. For example, when the object 50 reaches the location where the object 50-2 is located in the illustration, the door member 30 can close such that the analysis can be performed with respect to the object 50-2. In the meantime, the object 50-1 has just exited the light box 10, while the object 50-3 is the next object awaiting analysis, which will be done upon reaching the appropriate location in the light box 10 such that it can be photographed by the camera sensor 21.The light box 10 may therefore be arranged in tandem with a conveyor 80 adapted to transport the objects 50-1, 50-2, 50-3 to and from the light box 10. The conveyor 80 can ensure a smooth and consistent flow of objects 50-1, 50-2, 50-3 into the light box 10 for inspection or analysis. The conveyor 80 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 50 being transported, the required speed of transport, and integration with other system components. The conveyor 80 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 70, sensor 71, and conveyor 80 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.FIG. 5 shows another operational scenario of the light box 10. The light box 10 involves a tunnel- like configuration, enhancing the operational flow by allowing objects 50-1, 50-2, 50-3 to enter from one end, the front portion 11, and exit from the other, the rear portion. As discussed above, this arrangement can be particularly for continuous inline processes.A conveyor 80 runs through the entire length of the light box 10, entering at the front portion 11 and exiting at the rear portion 14. The object 50-2 is positioned inside the light box 10 and is ready for analysis. This positioning within the light box 10 may ensure that the object 50-2 can be evenly illuminated by the interconnected light panel units 22 and be imaged by any integrated camera sensors (or other types of sensors), such as the camera sensor 21. Meanwhile, the object 50-1 has just exited the light box through the rear portion 14, having completed its analysis or inspection. This exit at the rear portion 14 may allow for seamless continuation for an optional further processing or handling outside the light box 10. The object 50-3 is about to enter the light box 10 through the front portion 11, ready to be moved into position for its analysis. The entrance of new objects as others exit can help to maintain a consistent workflow.FIG. 6 is a schematic flowchart illustration of an exemplary method 100 for GD&T analysis of an object 50 located within the light box 10 as discussed herein. At 110, the method 100 receives the object 50 from the external environment 60. At 120, the method 100 closes a door member 30 such that the interior of the light box 10 is enclosed from the external environment 60. At 130, the method 100 captures at least one image of the object 50 while the object 50 is located within the light box 10. At 140, the method 100 opens the door member 30 such that the door member 30 folds in a space 16 accommodated by the light box 10 At 150, the method delivers the object 50 from the light box 10 to the external environment 60.The method 100 as described above can function with any of the additional embodiments, variations and examples discussed throughout this disclosure. For example, the space 16 can be accommodated inside outer boundaries of the light box. In another example, the flexible door member can comprise an interior side 31 facing the interior of the light box 10, the interior side 31 being covered by a light diffuser material. In another example, the door member 30 can consist of a synthetic elastomer material. In another example, the space can be 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. In another example, the door member 30 in the open position can be supported by the at least one support member. In another example, the at least one support member can be a roller enabling a folding movement of the door member 30. In another example, the light box 10 may comprise an upper sheet 18 laterally mounted below the at least one support member 17. In another example, the light box 10 can comprise 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 carries at least one camera sensor 21 adapted to capture one or more images of the object located within the light box. In another example, the light box 10 may comprise a plurality of interconnected light panel units 22 mounted at interior surfaces of the light box 10, at least one of said light panel units 22 comprising an aperture 23 through which the robotized arm 19 is received. In another example, a leading edge 33 of the flexible door member 30 may comprise a load element 34. In another example, the light box 10 may comprise at least one longitudinal rail 36 attached to the front portion 11 of the light box 10, the door member 30 being adapted to travel along said at least one longitudinal rail 36. In another example, the space 16 may be accommodated along at least one side portion 13-1, 13-2 of the light box 10. In another example, the door member 30 may comprise a motorized drive unit 35 adapted to drive the flexible door member between the open and closed positions. In another example, the light box 10 may further comprise a second flexible door member 40 movable between an open position and a closed position for opening and closing a rear portion 14 of the light box 10, wherein the second flexible door member 40 in the open position is arranged to fold in a space 16 accommodated by the light box 10, and the second flexible door member 40 in the closed position is arranged to enclose the interior of the light box 10 from the external environment 60. In some examples, the door member 30 and the second flexible door member 40 may be independently or mutually operable and arranged to fold in the same space 16 or a different space accommodated by the light box 10. In some examples, the light box 10 may comprises control circuitry 70 configured to: obtain sensing data from a sensor 71 being indicative of the object 50 located within a recognizable distance from the light box 10, and control a closing or opening movement of the door member 30, and optionally of a second flexible door member 40, based on the movement data. In some examples, the light box 10 may be arranged in tandem with a conveyor 80 adapted to transport the object 50 to and from the light box 10.For the above-described method 100, and optionally for any of its exemplary embodiments, the sequence of operations defined by steps 110, 120, 130, 140 and 150, can be executed under the guidance of control circuitry 70. This control circuitry 70 may correspond to the control circuitry 70 discussed herein. The control circuitry 70 can thus can automate one or more steps of the method 100, coordinating the actions in response to data received from e.g. sensors or pre-set schedules. This is to ensure that each step can be performed at correct times and in the correct sequence.For instance, a sensor 71 can detect the presence of an object 50 at the entrance of the light box 10 and trigger the control circuitry 70 to initiate the closing 120 of the door member 30. Once the object 50 is enclosed within the light box 10, the control circuitry 70 can activate imaging equipment to capture 130 images for analysis. Upon completion, the control circuitry 70 could then command the door to open 140, and finally, orchestrate the delivery 150 of the object 50 back to the external environment 60, for example by control of the conveyor 80.While this method 100 can benefit from automation, particularly relating to enhancing consistency and reducing the likelihood of human error, it is adaptable to allow for manual intervention or a combination of manual and automated steps.Depending on the operational characteristics and requirements of specific applications, some steps might be performed manually, such as manually placing the object 50 within the light box 10 or operating the door member 30 (and / or optionally the second door member 40). This flexibility can allow the method 100 to be tailored to different operational environments, balancing automation with human oversight where necessary. However, it shall be understood that integrating computer control via control circuitry 70 can streamline the process, possibly making it efficient and less prone to errors, which is particularly advantageous in high-throughput or precision-critical applications. This automation can also support the integration of the light box into larger automated systems or production lines, enhancing overall workflow efficiency.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 light box (10) for geometric dimensioning and tolerancing analysis of an object (50) 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), whereinthe flexible door member (30) in the open position is arranged to fold in a space (16) accommodated by the light box (10), andthe flexible door member (30) in the closed position is arranged to enclose the interior of the light box (10) from an external environment (60).

2. The light box (10) of claim 1, wherein the space (16) is accommodated inside outer boundaries of the light box (10).

3. The light box (10) of any preceding claim, wherein the flexible door member (30) comprises an interior side (31) facing the interior of the light box (10), the interior side (31) being covered by a light diffuser material.

4. The light box (10) of any preceding claim, wherein the flexible door member (30) consists of a synthetic elastomer material.

5. The light box (10) of any preceding claim, 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).

6. The light box (10) of claim 5, wherein the flexible door member (30) in the open position is supported by the at least one support member (17).

7. The light box (10) of any of claims 5-6, wherein the at least one support member (17) is a roller enabling a folding movement of the flexible door member (30).

8. The light box (10) of any of claims 5-7, further comprising an upper sheet (18) laterally mounted below the at least one support member (17).

9. The light box (10) of claim 8, further comprising 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 (50) located within the light box (10).

10. The light box (10) of claim 9, further comprising a plurality of interconnected light panel units (22) mounted at interior surfaces of the light box (10), at least one of said light panel units (22) comprising an aperture (23) through which the robotized arm ( 19) is received.

11. The light box (10) of any of claims 5-10, wherein a leading edge (33) of the flexible door member (30) comprises a load element (34).

12. The light box (10) of any of claims 5-11, further comprising at least one longitudinal rail (36) attached to the front portion (11) of the light box (10), the flexible door member (30) being adapted to travel along said at least one longitudinal rail (36).

13. The light box (10) of any of claims 1-4, wherein the space (16) is accommodated along at least one side portion (13-1, 13-2) of the light box (10).

14. The light box (10) of any preceding claim, wherein the flexible door member (30) comprises a motorized drive unit (35) adapted to drive the flexible door member (30) between the open and closed positions.

15. The light box (10) of any preceding claim, further comprising a second flexible door member (40) movable between an open position and a closed position for opening and closing a rear portion (14) of the light box (10), whereinthe second flexible door member (40) in the open position is arranged to fold in a space (16) accommodated by the light box (10), andthe second flexible door member (40) in the closed position is arranged to enclose the interior of the light box (10) from the external environment (60).

16. The light box (10) of claim 15, wherein the flexible door member (30) and the second flexible door member (40) are independently or mutually operable and arranged to fold in the same space (16) or a different space accommodated by the light box (10).

17. The light box (10) of any preceding claim, further comprising control circuitry (70) configured to:obtain sensing data from a sensor (71) being indicative of the object (50) located within a recognizable distance from the light box (10), andcontrol a closing or opening movement of the flexible door member (30), and optionally of a second flexible door member (40), based on the movement data.

18. The light box (10) of any preceding claim, wherein the light box (10) is arranged in tandem with a conveyor (80) adapted to transport the object (50) to and from the light box (10).

19. The light box (10) of any preceding claim, further comprising a lighting fixture comprising:a fixture body configured to be mounted within the light box (10);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; anda 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.

20. A method (100) for geometric dimensioning and tolerancing analysis of an object (50) located within a light box (10), comprising:receiving (110) the object (50) from an external environment (60); closing (120) a flexible door member (30) such that the interior of the light box (10) is enclosed from the external environment (60);capturing (130) at least one image of the object (50) while the object (50) is located within the light box (10);opening (140) the flexible door member (30) such that the flexible door member (30) folds in a space (16) accommodated by the light box (10); anddelivering (150) the object (50) from the light box (10) to the external environment (60).

21. The method (100) of claim 20, wherein one or more of the steps (110; 120; 130; 140; 150) of the method (100) are carried out in response to computer control via control circuitry (70).