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Distance Measuring Systems

Flexible Fiber Optic Measurement Technology with FDM-1 and FDM-2

The fiber optic measurement systems FDM-1 and FDM-2 enable non-contact measurements of distance, form, and surface features, even in demanding geometries. The interferometric measurement principle and miniaturized probes allow high-resolution measurements even in confined installation spaces.

The specially assembled miniature fiber optic probes provide a high degree of flexibility. With diameters starting from 50 µm, they can access very small or hard-to-reach cavities such as microbores, gaps, or narrow interdental spaces.

Thanks to the modular system design, probe and evaluation unit can be positioned independently and flexibly. High measurement rates, integrated interfaces, and dedicated software solutions enable seamless integration into automated manufacturing processes. For inline measurements in production environments.

Your Advantages

Measuring in confined spaces starting from Ø 0.1 mm
High-resolution non-contact measurements
Non-contact and wear-free operation
Suitable for fast 100-percent inspection processes
Compatible with a wide range of materials and surfaces
Single-point and multi-point measurements possible
Generation of 2D profiles and 3D point clouds
Support for DIN EN ISO compliant quality control
Automation and system integration capable
Electromagnetic compatibility (EMC)

System characteristics

FDM-1

For High-Resolution Measurement Tasks

Measuring range	80 µm
Distance-equivalent noise	< 15 nm
Diameter of the measuring probe	from 50 µm

FDM-2

For Extended Measurement Ranges

Measuring range	1 mm
Distance-equivalent noise	< 100 nm
Diameter of the measuring probe	from 50 µm

General parameters

Measurement principle	low coherence interferometry
Probe diameter	0.05 / 0.08 / 0.125 / 0.8 / 1.3 – 5 mm
Measurable materials and surfaces	Glas, metal, ceramics, plastic etc. – transparent, glossy, matt
Inner diameter of the tested object	from 0.1 mm
Direction of measurement	axial (0°), angular (45° – 90°)
Measuring frequency	up to 40 kHz (depending on the surface)
Multi-point measurement	parallel or sequential read-out from multiple probes
Software	FDMControl (control software) / DataViewer (analysis software)
Programming interfaces	API, DLL
System interfaces (configurable)	Trigger IN, Gate IN, Trigger OUT: TTL 5V, Ethernet, GPIO
Power supply	100–240 V AC, 50/60 Hz

Applications

FDM-1 and FDM-2 are particularly suitable for applications in industrial precision manufacturing. Difficult-to-access surface structures and confined installation spaces can be inspected flexibly and non-contact using the miniaturized probes.

Surface Characterization

Measurement of roughness and waviness on technical surfaces
Monitoring and detection of tool wear
Measurement of optics, optical components, and forming tools
Scanning measurements for 2D and 3D visualization, e.g. of freeform surfaces or gear flanks

Distance Measurement and Position Detection

Measurement of expansion, drift, wear, and vibrations on precision and production equipment
Precise position detection for alignment of components and tools
Multi-probe configurations possible

Form and Position Measurement

e.g. roundness, flatness, straightness, parallelism, and runout characteristics

Measurements in Confined and Hard-to-Reach Spaces

e.g. microbores, gaps, injection nozzles, or precision gear geometries

Integration into Measuring Instruments, Inspection Systems, and Industrial Equipment

Compatibility and automation through configurable interfaces
Single-point or multi-point measurements
Inline measurements in production environments
Integration into automated manufacturing and inspection systems

We develop customized solutions tailored to individual measurement tasks.

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