Diffuse Reflection Coaxial Fiber Optic Sensor

A diffuse reflection coaxial fiber optic sensor detects objects by reflecting light off surfaces, using a coaxial fiber design for high-precision and long-distance sensing.

Working Principle

Diffuse reflection fiber optic sensors operate by emitting light from a fiber optic cable toward a target. The light reflects off the object and is received by the same or adjacent fibers. In coaxial designs, the sensor uses a single-point emission and multi-point reception, which enhances detection accuracy, particularly for transparent or small objects.

This configuration allows the sensor to detect objects at longer distances and in confined spaces.

Applications

These sensors are widely used in: Electronics manufacturing for component detection and assembly verification. Automotive assembly for precise part positioning. Industrial automation for object counting, presence detection, and quality control.

Food and pharmaceutical industries for packaging inspection and transparent object detection.

Advantages

High precision: Coaxial design improves detection of transparent or reflective surfaces. Flexible installation: Customizable fiber lengths and extended probe designs allow access to tight or complex mechanical structures. Robustness: Many models feature IP67 protection, making them dust-tight and resistant to water jets, suitable for harsh environments.

Compatibility: Works with standard fiber optic amplifiers and supports various mounting sizes (M3, M4, M6) for broad adaptability. Non-contact operation: Reduces wear and maintenance, suitable for explosive or electrically noisy environments.

Technical Considerations

Fiber type: Coaxial fibers are preferred for high-accuracy and long-distance sensing, while non-coaxial fibers are cost-effective for general detection tasks. Amplifier integration: Fiber optic amplifiers convert the received light signal into electrical output, enabling integration with automation systems. Environmental tolerance: Many sensors operate across wide temperature ranges (e.g., -55°C to 80°C) and are unaffected by electromagnetic interference.

Summary

Diffuse reflection coaxial fiber optic sensors are highly precise, flexible, and robust devices ideal for industrial automation and quality control. Their coaxial design ensures reliable detection of challenging targets, including transparent objects, while offering adaptability for complex installations and harsh environments.