What makes endoscopic surgery "minimally invasive" comes down to two things: an imaging system that can see inside the body, and an illumination system that can deliver light there. Both depend on optical fiber. Endoscope fiber optics are specialty fibers designed for this exact scenario. They must transmit light through extremely narrow channels, withstand repeated bending, survive high-temperature sterilization, and in some cases, come into direct contact with human tissue. Unlike industrial fibers, endoscope fibers have far higher requirements for biocompatibility, flexibility, and sterilization resistance. Two Core Applications Illumination Fiber: Getting Light In Image quality in endoscopy is half camera, half lighting. Without proper illumination, even the best optics can't produce a clear image. Endoscope illumination fibers are typically arranged in bundles, delivering light from an external source into the body. They are thin, flexible, and highly transmissive. The fiber bundle is housed inside the endoscope's channel, bending with the scope while maintaining low loss. Hecho's reusable endoscope light guides are this type of product — delivering wide-angle, uniform, high-color-rendering illumination. Imaging Fiber: Getting the Image Out Some endoscopes — particularly fiber-optic endoscopes — don't use CCD or CMOS sensors. Instead, they use fiber bundles to transmit the image directly. These imaging bundles consist of thousands of ultra-fine fibers, each transmitting one pixel. The entire bundle carries the internal image to the outside. The precision of fiber arrangement directly determines image resolution. Single-Use vs. Reusable: Two Paths for Endoscope Fibers Endoscope fiber products fall into two categories: reusable and single-use. Reusable fibers must withstand repeated autoclaving or chemical disinfection. This requires fiber materials that tolerate high temperatures and chemical exposure while maintaining optical performance. Glass fiber, with its temperature resistance and chemical inertness, is the mainstream choice for reusable endoscope light guides. Single-use fibers offer one major advantage: eliminating cross-infection at the source. No sterilization process needed — ready to use, discarded after use. Hecho's single-use endoscope plastic optical fiber uses PMMA material, providing illumination and imaging light paths for single-use endoscopes. In June 2026, Hecho Technology received Class II medical device registration for both its "Medical Laser Fiber" and "Single-Use Sterile Laser Fiber" — establishing the company's regulatory qualification for compliant production and sales in the medical fiber sector. Key Selection Parameters Choosing endoscope fibers follows different logic than industrial fibers. Industrial fibers focus on transmission efficiency and uniformity. Endoscope fibers require additional considerations: Outer diameter. Endoscope working channels are extremely narrow. The fiber bundle diameter must match precisely. Smaller bundles mean less invasiveness. Flexibility. Endoscopes navigate curves and bends inside the body. The fiber bundle must follow without breaking. Smaller bend radius improves maneuverability. Sterilization resistance. Reusable fibers must survive repeated sterilization cycles — glass fiber has a natural advantage here. Biocompatibility. The portion entering the body must meet biocompatibility requirements — no rejection or toxic response. Market Trends The medical laser fiber market is growing rapidly. The global medical laser market is projected to reach $6.24 billion in 2026 and $14.88 billion by 2034. Endoscopy is one of the core application segments. Single-use endoscopes are becoming a clear trend — eliminating cross-infection at the source while reducing hospital sterilization costs and infection control risks. This places new demands on endoscope fibers: lower cost, higher consistency, and suitability for volume production. Hecho Technology has product lines covering both reusable light guides and single-use plastic optical fibers for endoscope applications. For specifications or custom solutions, contact the Hecho technical team.