We are Demcon Focal
Demcon Focal achieves customized design and engineering (D&E) in a multidisciplinary approach, entailing optical, vision, data, electronic, software, mechanical and system engineering. Activities include high-level requirement engineering, concept optical design, prototyping, detailed engineering, system integration and manufacturing, assembly, integration and test activities.
Demcon Focal also performs specialized volume production that requires trained engineers, dedicated equipment and clean environment. We also offer system service and support in possible combination with Demcon Production, so we are open for high volume production of complex optical modules.
As camera frame rates increase, true real-time vision controlled systems will become cost-effectively available. Visual inspection loops of 2D image computing at 1,000Hz will be reality. We design and implement FPGA-based vision-in-the-loop solutions for real-time, precision quality inspection in a control & feedback loop.
Computation power is increasing rapidly and allows deep learning and neural network combinations for support tasks in recognition. Custom made neural networks with proper data pre-processing will have clear advantage above the more general neural networks without proper pre-processing. We design such custom made inspection algorithms based on our concepts. In our concepts the customer can create and train the network himself without having knowledge of deep learning or neural networks. We also use synthetic data to train our neural networks. This helps to overcome the limited available training data set and also it is useful when multiple defects have to be recognized.
Freeform optical components
Finally, cost-effective aspheres, rotational invariant discontinuous surfaces, structured surfaces, arrays of lenses or pyramids can be introduced in optical systems since modelling, manufacturing and measuring freeform optics is maturing. This allows optical engineers more design freedom in the areas like semiconductor development, consumer electronics (HMD, mobile phone cameras, etc.), general lighting and automotive applications (LED) and medical e.g. personalized ophthalmology.
Accurate centering and tip tils of lenses in lens system is important to achieve the best optical quality. We have an in-house alignment tool that allows centering with 1 um and tip tilt accuracy of 50 µrad.
Surface measurements in sub-mm and sub-μ range for complex shape inspection tasks in industrial environment. Demcon Focal has realized metrology systems that use different optical measurement principles, like optical coherence topography, chromatic confocal methods, depth from shading, structured light, laser and led triangulation systems. These technologies are applied in height profile of MEMS chip structures, inline measurement in micro-machining systems, freeform lens measurement systems and surface irregularities inspection systems.
HOW WE WORK
Although there are different approaches for turnkey vision systems and OEM-modules, we roughly take a similar staged approach:
This phase is all about understanding your needs. Maybe you have already a brief description with images or drawings to explain your ideas. We will contact and visit you and collect examples of items that have to be automatically inspected or measured. We will have a brainstorm session to collect your input and ideas. After a first assessment, we will provide you with an outlook, scope and plan for the project.
Several technical solutions and options will be evaluated, based on a more thorough intake and investigation. In cases requirements cannot fully be defined (made SMART), the feasibility phase will be used to identify the requirements. Suggested solutions for the concept design including budget estimates will emerge from this phase. For OEM modules we provide an overview and trade-off of concept solutions and expected performance.
In this stage you have given the “GO” for detailed design and engineering work and we will define, purchase and have components produced that will constitute the optical module. We will choose and implement the most rigid optical imaging, illumination and/or vision algorithm strategy and work towards an integrated module. Your use-case or user flow definitions will be implemented. For OEM manufacturers we provide detailed design and test documentation accompanied with a performance analysis.
In this stage, we will integrate the module in your environment and establish connections with any mechanisation or mechatronics present, and interface with quality or monitoring systems. For OEM-customers, we will perform the qualification of the module and provide the means for integration of the OEM-module in your product.