Optoelectronics
Custom optoelectronics for high-reliability solutions
By Roger Tall, director of Charcroft Electronics N
ot every application can rely on standard optical components. In industrial, medical, aerospace, and advanced manufacturing
environments, the demands on sensors and illumination systems are often so specific that off-the-shelf parts just do not meet the specifications. Engineers need components which are tailored to precise optical, electrical, and mechanical requirements, and that is where custom optoelectronic solutions offer precise benefits. Most manufacturers of optical components focus on standard products designed for high-volume production. Customisation takes extra time, effort, and resources, so it is often overlooked. Yet for many applications, customisation is not a luxury, it is a necessity. Working with franchise partners, TT Electronics, Charcroft helps customers to meet complex specifications by providing customised optical sensors or fully integrated assemblies, ranging from offering binning to complete turnkey solutions.
Using application-specific sensors can improve precision, speed, and reliability. One relatively simple form of customisation is binning. LEDs, photodiodes, and phototransistors can be sorted to tight specifications, giving engineers sets of components with virtually identical characteristics. Matching colour temperature, luminous flux, forward voltage, or other critical parameters not only simplifies design but also improves the performance and consistency of the finished product.
Solving technical challenges Customisation also helps to overcome technical hurdles. A common challenge in optical sensing is aligning transmitters and receivers with extreme precision. Standard components may not allow
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of robust connectors, providing maximum flexibility for integration.
Reliability in harsh environments Harsh environmental conditions demand reliability. Custom optoelectronic assemblies are designed to operate under harsh conditions, whether that means high temperatures, vibration, or exposure to contaminants. A key example of this is high-speed, high-voltage opto-isolators. Unlike standard low-cost opto-couplers, these components are designed for long-term reliability and often carry UL approval. By combining optical design, mechanical packaging, electronics, and cabling into a fully integrated assembly, customised solutions ensure engineers can meet the most challenging specifications without compromise.
the required adjustment, but a custom designed plastic housing can solve the problem.
Integrated electronics are another area where custom solutions add value. An optical assembly may include ASICs, signal conditioning, or other embedded circuitry, allowing sensors to deliver a clean analogue or digital output straight to a controller. This reduces external circuitry, saves space, and simplifies the overall design.
Testing is a critical part of
customisation. Automated, application- specific testing ensures sensors meet environmental and compliance standards, while additional inspection and measurement verify the performance of each assembly. For high-reliability applications, this can include burn-in procedures, environmental stress testing, and qualification to recognised standards.
Components in Electronics
Manufacturing and assembly Delivering these customised solutions requires specialised manufacturing processes. Advanced processes such as laser trimming allow precise adjustment of optical sensors to exact specifications for sensitivity, resistance, or capacitance. The process actively measures electrical characteristics while the substrate is modified, ensuring each device meets its target performance.
Automated PCB assembly further optimises board space, enabling two-sided mounting of both surface-mount and through-hole optical components. Once the electronics and optical elements are complete, custom wiring harnesses and connectors are added to create a ready- to-install, turnkey module. Engineers can choose from single or multi-conductor cables, ribbon cables, or jacketed assemblies, in addition to a wide range
Modern design demands As systems grow more complex, the role of optical sensors and illumination technologies only becomes more central. Customisation allows engineers to balance performance, reliability, and integration while reducing development risk. For OEMs in industrial, automation, aerospace, medical, and other high-reliability sectors, custom optoelectronic assemblies make challenging designs achievable.
Whether it is binning components to improve consistency, designing a custom optical housing, or producing a fully assembled module with integrated electronics and connectors, tailored solutions offer a clear advantage over standard parts. The custom solutions streamline production, improve system reliability, and help engineers to bring advanced designs to market faster. Customisation offers a critical design opportunity to meet the most demanding specifications in optics and optoelectronics in high-reliability applications.
https://www.charcroft.com/
www.cieonline.co.uk
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