Optical Diameter of Fiber Optic Sensor
Fiber optic sensor diameters range from as small as 50 µm for miniature probes to over 1 mm for reinforced or enhanced-distance probes.
Standard Fiber Diameters
Fiber optic sensors come in various diameters depending on their type and application. Bare fiber probes typically have diameters of 80 µm or 125 µm, with 50 µm available on custom request for highly precise applications . These are used in metrology, testing, and micro-manufacturing where minimal space and high accuracy are required.
Protected and Reinforced Fibers
For durability and industrial use, fibers are often reinforced with protective sleeves. Standard diameters for these protected bare fibers are around 0.8 mm, while probes designed for enhanced working distance can have diameters of 1.3 mm . These larger diameters provide mechanical stability and allow for longer sensing distances.
Miniature and Custom Probes
Miniaturized fiber optic probes are available for applications requiring high precision in confined spaces, such as scanning microstructures or detecting minute objects. Diameters can start from 50 µm, and manufacturers often offer custom solutions tailored to specific requirements, including non-standard diameters and beam profiles .
Industrial Sensor Heads
In factory automation, standard cylindrical or square fiber optic sensor heads are used for general object detection. While the exact diameter of these heads varies by manufacturer, they are designed to balance ease of installation, durability, and detection accuracy, often ranging from a few millimeters to over 10 mm for the housing, while the fiber itself remains in the sub-millimeter range .
Summary
- Bare fiber: 50–125 µm
- Protected fiber: ~0.8 mm
- Enhanced distance fiber: ~1.3 mm
- Miniature probes: starting from 50 µm, customizable
- Sensor head housing: typically a few millimeters to over 10 mm These variations allow fiber optic sensors to be used in tight spaces, harsh environments, and precision applications, making them highly versatile for industrial, scientific, and telecommunications purposes .
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