LED light sources have become mainstream in industrial inspection. Low power consumption, long lifespan, stable output — clear advantages. But in some applications, halogen light sources are still in use, and they won't be fully replaced anytime soon. Advantages of Halogen Lamps Continuous spectrum. LEDs are narrowband sources with spectral peaks. Halogen lamps emit a continuous spectrum covering visible to near-infrared. For applications requiring broad-spectrum output — spectroscopy, color inspection, certain IR scenarios — the continuous spectrum of halogen is a natural advantage. Excellent color rendering. Halogen lamps have a color rendering index close to 100, delivering true color reproduction. For inspection scenarios requiring accurate color judgment, halogen is more reliable than standard LEDs. Low cost. Halogen bulbs are inexpensive, and the light source construction is simple. The Drawbacks Are Clear Short lifespan — typically only 1,000 to 2,000 hours, requiring regular replacement. High heat output — heat is generated right at the bulb, unfriendly to heat-sensitive samples. High power consumption — low energy efficiency. Where It‘s Used Spectroscopy. Applications requiring continuous broad-spectrum output. Microscope illumination. Observation scenarios with high color rendering requirements. Near-infrared applications. Halogen lamps deliver abundant energy output in the NIR range. Fiber Optic Cold Light Sources Are the Better Choice Using a bare halogen lamp puts heat right next to the sample. With a halogen cold light source, heat stays at the source unit, and light travels through fiber to the output end — the output stays cool. This preserves the spectral advantages of halogen while eliminating thermal interference. Hecho Technology supplies original SCHOTT cold light sources, including the KL, ACE, DCR, and MEGALIGHT series, with matching fiber optic light guides. Product page: https://www.gohecho.com/products If you need halogen cold light sources for spectroscopy or specialized illumination applications, contact the Hecho technical team.

In industrial laser cutting, welding, and marking, the energy generated by the laser source must be delivered to the processing head. This task falls to high-power laser fiber. Unlike telecom fiber, high-power laser fiber doesn‘t carry signals — it carries energy. Kilowatts of laser power concentrated into a small core cross-section place extreme demands on heat resistance, end-face quality, and damage tolerance. What Matters Most? Low loss. The lower the loss during energy transmission, the higher the power delivered to the processing head. Quartz fiber achieves very low transmission loss in the near-infrared range. High power handling. The fiber end face and interior must withstand high power density without damage. Material purity and manufacturing processes directly determine power handling capability. Bend performance. The processing head moves, and the fiber bends with it. Loss must not rise significantly under bending, and the fiber must not break. Where It’s Used Laser cutting. High-power laser is delivered through fiber to the cutting head, focused for metal plate cutting. Laser welding. In automotive and battery manufacturing, fiber delivers energy to the weld point. Laser marking. Precision marking demands high beam quality — fiber transmission stability directly affects marking results. Hecho Technology‘s high-power laser fiber product line includes industrial high-energy fiber, medical laser fiber, and holmium laser medical fiber — using compliant materials, with support for different power levels and connector specifications. Product page: https://www.gohecho.com/high-power-laser-fiber_c7 If you have fiber selection requirements for laser processing systems, contact the Hecho technical team.

In PCB manufacturing, conventional exposure processes require a photomask to transfer circuit patterns onto the board. Masks expand and contract with temperature and humidity, fine traces can misalign, and every product change requires a new mask — time-consuming and material-intensive. LDI (Laser Direct Imaging) takes a different approach: no mask, direct laser scanning. CAM data drives the laser directly, "drawing" the circuit pattern onto the PCB‘s photosensitive layer. Finer imaging, no mask fabrication step, and no mask distortion errors. In this system, optical fiber handles laser delivery and beam shaping. What Makes LDI Fiber Different? LDI lasers typically operate in the UV or near-UV range, placing high demands on fiber transmission efficiency and end-face quality. The fiber must deliver laser light from the source to the scanning head with low loss while maintaining beam uniformity. If fiber transmission is unstable, imaging accuracy suffers directly. Hecho’s LDI laser imaging fiber is a coupling product developed specifically for this application. It has undergone technical validation and refinement within the LDI industry, delivering stable performance and supporting fine trace fabrication — suitable for PCB production with demanding precision requirements. Product page: https://www.gohecho.com/optical-fiber-bundles_c6 Beyond LDI fiber, Hecho‘s optical fiber bundle product line includes ring fiber, multi-branch bundles, and single-tube bundles — with customizable length, branch configuration, and connector specifications to match your optical path design. If you have fiber selection requirements for LDI or PCB imaging systems, contact the Hecho technical team.

Some industrial environments don't run "a little warm." They run at hundreds of degrees. Boilers, kilns, combustion chambers, engine exhaust ports — these places need monitoring, but electronic sensors can't go there. Neither can standard optical fiber. Plastic fiber softens at 85°C. Standard glass fiber loss rises sharply at elevated temperatures. High-temperature fiber is designed for these scenarios. How Is It Different from Standard Fiber? Material. High-temperature fiber typically uses high-purity quartz for the core and cladding, combined with a high-temperature coating (such as polyimide). Continuous operating temperatures can reach 400°C, with short-term tolerance even higher. Coating. Standard acrylic coatings degrade and yellow at high temperatures. High-temperature fiber uses polyimide or metal coatings — far superior in temperature and chemical stability. Transmission stability. In high-temperature environments, standard fiber loss increases with temperature. High-temperature fiber is specifically designed and screened to maintain stable optical performance under heat. Where It's Used Flame detection. Flame signals inside burners and boilers must be transmitted to external detectors. The high-temperature environment is a continuous challenge for the fiber. High-temperature sensing. Temperature monitoring in industrial furnaces, pipelines, and engines — fiber optic sensors must operate long-term under heat. Industrial borescope inspection. Visual inspection inside high-temperature equipment requires light guides that withstand on-site temperatures. Hecho Technology's customized optical fiber product line includes high-temperature fiber solutions, with specifications matched to operating temperature, wavelength, and connector requirements. Product page: https://www.gohecho.com/customized-optical-fiber_c8 If you need optical transmission or sensing in high-temperature environments, contact the Hecho technical team for selection assistance.

Some inspection systems need to illuminate two locations at once. Dual-tube fiber optic light guides solve this: one light source, two output ends. What It Is A single fiber bundle splits into two independent output ends. The input connects to one light source. Light exits from two outputs, each bendable and positionable separately. One light source, two light tubes, two workstations. Key Features Single source, dual output — saves cost and equipment space. Independently bendable outputs — each adjusts angle and position separately. Multiple materials — glass (GOF), quartz (Silica), plastic (PMMA). Flexible specs — core diameters 3mm to 8mm, gooseneck or stainless steel conduit, custom connectors. Where It‘s Used Dual-station inspection, dual-camera systems, medical equipment with two illumination points, industrial borescope inspection. Hecho Technology’s dual-tube fiber optic light guides come with complete specifications. Product page: https://www.gohecho.com/dual-tube-fiber-optic-light-guide_p4.html For a single-source dual-output solution, contact the Hecho technical team.

In industrial inspection, some scenarios place special demands on fiber — high temperatures, harsh conditions. Standard plastic optical fiber can't handle it. Take flame detection. Burners, boilers, and industrial furnaces operate at extreme temperatures. Sensors can't be placed on-site, but the flame's optical signal needs to be transmitted out. That's where glass fiber bundles come in. Why Glass? Glass fiber bundles offer far higher temperature resistance than plastic. Plastic optical fiber typically maxes out at 85°C, while glass fiber operates reliably at up to 350°C — suitable for high-temperature industrial environments. Another key advantage: high numerical aperture. Glass fiber bundles have a wide acceptance angle, capturing more light from divergent sources like LEDs or halogen lamps. For flame detection — where weak optical signals need to be captured — high NA means higher coupling efficiency.

The core value of ring fiber optics is simple: 360-degree light output, eliminating shadows. Single-direction lighting always casts shadows. Raised features create shadows, and algorithms mistake them for defects. Ring fiber optic light guides form a circle, emitting light from all directions simultaneously — the shadows cancel out. Three typical applications: Microscope illumination. Ring fiber optics mount around the objective lens, illuminating samples evenly from all directions. Biological sample observation, material analysis, electronic component inspection — wherever shadow-free, high-definition imaging is needed, ring fiber is standard. PCB solder joint inspection. Solder joints and pins on circuit boards are densely packed, and single-direction lighting creates severe shadows. Ring fiber illuminates evenly from 360 degrees, revealing solder joint shape, position, and defects clearly. Semiconductor wafer inspection. Wafer surfaces are mirror-grade reflective. Standard lighting produces either a completely dark or completely washed-out image. Ring fiber, combined with coaxial or dark-field configurations, makes micro-scratches and particles stand out. Hecho Technology‘s ring fiber optic light guidesProduct page are available in glass and quartz, with multiple inner diameters, outer diameters, and output angles — customizable based on lens size and inspection requirements. Product page: https://www.gohecho.com/ring-fiber-optic-light-guides If you have questions about ring fiber selection, contact the Hecho technical team.

Plastic optical fiber (POF) has a reputation problem in the fiber industry. High loss, poor temperature tolerance, short transmission distance — sounds like the "cheap stuff." But from another angle, POF might be the most misunderstood fiber category. It Does Have Limitations POF uses PMMA for the core and fluorinated polymer for the cladding. Compared to quartz fiber, loss is several orders of magnitude higher, temperature tolerance typically doesn't exceed 85°C, and transmission distance is generally limited to within 100 meters. These limitations are inherent to the material itself. So if your application needs long distance, high temperature, or low loss, POF is genuinely not the right choice. But Its Strengths Lie Elsewhere Large core, easy to install. Core diameter is typically 1mm, with a core-to-cladding ratio as high as 96%. Alignment tolerances are relaxed — a slightly dirty or offset end face still transmits light. Connectors can be inexpensive plastic parts. No fusion splicer needed — a blade and a connector will do. Flexible, bend-resistant. POF is very flexible with a small bend radius, and it tolerates repeated bending without breaking. In automotive interiors, robot joints, and mobile devices where frequent bending is required, this is a real advantage. Low cost. Material and processing costs are far below quartz fiber. For applications that don't need high performance, using quartz fiber is simply overkill. Where It Fits Best Automotive networks. In-vehicle networks don't need high bandwidth, but they do need EMI immunity, light weight, and controlled cost. POF fits all three. Industrial sensing. Short-distance photoelectric sensing, position detection, liquid level detection — POF pairs with simple light sources and detectors. Low cost, easy installation. Illumination and decoration. Short-distance light guiding, decorative lighting, display case lighting. POF is flexible, safe, and low-cost. Consumer electronics and appliances. Fiber connections in audio systems, TVs, and game consoles — high volume, cost-sensitive. How Hecho Uses Plastic Optical Fiber Hecho Technology's plastic optical fiber products are primarily used in medical applications, specifically disposable endoscopes. Single-use, cost-controlled, and eliminating cross-infection at the source — this is exactly where POF's strengths align best. Related products include: Dual-Tube Fiber Optic Light Guide — supports GOF, Silica, and PMMA materials. Product page Customized Optical Fiber — covering fNIRS near-infrared fiber bundles, ring fiber, high-temperature fiber, and more, with custom options available. Product page Different fiber materials solve different problems. Choose the right material for the right application — there's no "low-end" material, only the wrong choice. If you have questions about fiber selection, contact the Hecho technical team.

These three terms show up together all the time in fiber selection. Many people assume they're the same thing. They're not. Fiber Patch Cords A fiber patch cord is a single fiber with connectors on both ends. It's used mainly in telecom and network cabling to connect two devices. Single core, short distance, data transmission. Common types include singlemode and multimode patch cords, with LC, SC, FC, and ST connectors. It carries signals — not optical energy. Fiber Bundles Linear Fiber Optic Light Guide A fiber bundle is a group of many individual fibers gathered together. Multi-core, branchable, optical energy transmission. Both the input and output ends can have multiple fibers, enabling many-to-one, one-to-many, or many-to-many configurations. Bundles can be arranged into ring, linear, or area output shapes — used in machine vision illumination, endoscope light delivery, and spectroscopy. The core value of a fiber bundle is splitting or combining light — one source can feed multiple stations, or multiple sources can be combined into one output. Fiber Optic Light Guides A fiber optic light guide is a "finished" form of fiber bundle. The bundle is encapsulated with protective tubing and end connectors, ready for direct installation. Encapsulated, plug-and-play, optical energy transmission. Light guides typically have defined specifications — length, output shape, connector type, operating temperature range. Users can connect them directly to a light source and inspection station. How They Relate Simply put: Fiber patch cord: signal transmission, single core, telecom applications Fiber bundle: optical energy transmission, multi-core, customizable shapes — the "raw material" or "semi-finished" form Fiber optic light guide: encapsulated fiber bundle, plug-and-play — the "finished product" Fiber bundles and light guides share the same core purpose — transmitting light, not data. The difference is that a light guide is encapsulated with defined specifications, while a bundle is more about customization and flexible configuration. How to Choose Data transmission, device connection — fiber patch cord. Optical energy transmission, custom light shapes — fiber bundle or light guide. Plug-and-play with defined specs — fiber optic light guide. Highly customized, flexible branching — fiber bundle. Hecho Technology has nearly two decades of experience in fiber bundles and light guides, covering plastic, glass, and quartz fiber — with ring, linear, area, and branched configurations, customizable in length, connector, and output shape. For selection assistance, contact the Hecho technical team.

When you buy optical fiber, the supplier hands you a spec sheet. Loss, NA, core diameter — the numbers look good. But once it's installed in your equipment, the performance may tell a different story. The problem? There's a gap between what's on the spec sheet and how the fiber actually performs. First: Check the End Face End-face quality is the most overlooked — and most performance-critical — factor. Poor end-face preparation shows up in three ways: scratches, chips, and contamination. Scratches increase scattering loss. Chips distort the output beam. Contamination absorbs light energy directly. In high-power applications, end-face defects can even trigger thermal damage and fiber failure. The test is simple: inspect the end face under a microscope. A good end face should be flat, smooth, free of scratches and chips. If a supplier can't provide an end-face inspection report, that's a red flag. Hecho Technology's medical laser fibers and quartz fiber products undergo end-face inspection before shipment to ensure output quality. Second: Check Bending Performance Fibers will bend in real-world use. But "bend tolerance" varies widely between fiber types. A straightforward test: wrap the fiber around a cylinder of known diameter and measure the output power change before and after bending. The smaller the change, the better the bend performance. Some fibers show low loss in a straight configuration — but bend them slightly, and loss spikes. In equipment with tight internal routing, this directly reduces transmission efficiency. G.657 bend-insensitive fiber is designed for exactly this problem — bend radius can be very small with minimal loss. Third: Check Batch Consistency This is the most overlooked factor — and the one that matters most for volume production. A single fiber testing well doesn't mean every fiber in a batch performs the same. If batch-to-batch consistency is poor, equipment calibration parameters need constant adjustment, and production line efficiency suffers. The test: ask the supplier for test data across multiple batches. If they only provide a "typical value," they don't have confidence in their consistency. Summary Spec sheet numbers are the starting point. What actually determines performance is end-face quality, bending behavior, and batch consistency. Hecho Technology has nearly two decades of experience in specialty fiber. Our quartz, glass, and plastic fibers all undergo end-face inspection and performance testing, with batch delivery and custom specifications available. If you have questions about fiber selection or quality evaluation, contact the Hecho technical team.

Semiconductor wafer inspection demands a different level of lighting than standard industrial inspection. Wafer surfaces are mirror-grade reflective. Micro-scratches, particles, and film thickness variations are nearly invisible under ordinary lighting. Inspection精度 requirements reach micron or even nanometer levels. The illumination system must do two things: be uniform, and eliminate glare. Why Is Wafer Inspection So Hard to Light? A wafer surface acts like a mirror. Light hits it, and most of it reflects away. The camera receives very little. If the light angle is wrong, the image is either completely dark or completely washed out — defect information is lost entirely. Heat is another problem. Wafer inspection typically happens in cleanrooms, where temperature fluctuations affect measurement accuracy. Traditional halogen lamps generate significant heat — local temperature rise near the wafer can interfere with inspection results. How Fiber Optic Illumination Solves These Problems Coaxial fiber optic illumination is the most common approach in wafer inspection. Light is projected vertically from directly above the lens, and the reflected light returns along the same path into the camera — essentially "seeing" the true front-surface reflection of the wafer. Coaxial illumination eliminates angled shadows, making surface defects clearly visible in a uniform bright field. Dark-field ring fiber takes a different approach. Light hits at a steep angle from the side. Flat surfaces reflect light away from the camera. Only raised defects scatter light into the lens. Defects "light up" against a dark background with extremely high contrast — ideal for detecting micro-particles and shallow scratches. Cold light is equally important. Hecho‘s S5000 series LED cold light sources use a light-heat separation design. Heat stays at the source. The output end emits virtually no thermal radiation. The wafer doesn’t heat up from illumination, and measurement results stay stable. What Fiber to Use? Wafer inspection places specific demands on fiber uniformity and spectral characteristics. Quartz fiber offers low transmission loss and broad spectral range for applications requiring specific wavelengths. Glass fiber is cost-effective for standard visible-light inspection. Ring fiber optic light guides and coaxial fiber are the most commonly used configurations in wafer inspection. Hecho Technology offers ring, coaxial, and linear fiber optic light guides in glass and quartz — with customizable inner diameter, outer diameter, and output angle based on wafer size, inspection wavelength, and machine space constraints. If you‘re selecting an illumination solution for wafer inspection equipment, contact the Hecho technical team. About Nanjing Hecho Technology Co., Ltd. Hecho Technology focuses on optical transmission solutions for medical, industrial, and scientific applications. Products include plastic optical fiber, glass fiber, quartz fiber, fiber bundles, light guides, and sensors, with OEM/ODM customization available. Website: www.gohecho.cn | Email: sales@gohecho.cn | Tel: (025)52374096

Industrial equipment rarely fails without warning. Bearings overheat. Pipelines leak. Conveyor rollers start making noise. But these signs are usually noticed too late. Fiber optic sensing is changing that. A single optical fiber can both transmit light and sense changes. Mounted on equipment, it can "listen" for abnormal sounds and "measure" temperature. No power required. Immune to electromagnetic interference. One fiber can cover kilometers. Fiber optic "auscultation": A failing conveyor roller can cause belt tearing. Huawei and Conch Cement deployed a distributed fiber optic sensing solution for roller monitoring — 24/7 detection with over 95% alarm accuracy. Fiber optic "thermometry": State Grid Chengdu's oil-immersed transformer fiber optic temperature controller achieves ±1°C accuracy, solving the problem of traditional controllers exceeding 5°C error in strong electromagnetic environments. Zhejiang University's Huzhou Institute developed a distributed temperature sensing system that measures up to 10 kilometers with sub-meter spatial resolution using a single telecom-grade fiber. Threaded Connect Fiber Optic Sensor Why is fiber optic sensing gaining traction in industrial settings? Passive operation, immune to EMI. One fiber replaces hundreds of point sensors. Corrosion-resistant, long lifespan, maintenance-free. Fiber optic sensing places specific demands on the fiber itself: high temperature resistance, low loss, long-distance transmission. Hecho Technology's quartz fiber offers low transmission loss and broad spectral range for long-distance sensing signal transmission. Glass fiber withstands temperatures up to 350°C, suitable for high-temperature industrial sensing applications. Both support custom lengths and connectors to match specific sensing system requirements. If you're selecting fiber for a sensing system, contact the Hecho technical team.