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Distance Measuring Systems

Flexible precision with FDM-1 and FDM-2

The fiber-optic distance measuring systems FDM-1 & FDM-2 use high-precision sensors for performing contactless distance, shape and roughness measurements with a resolution in the sub-nanometer range. The specially fabricated miniature fiber-optic probes allow for enormous flexibility. With diameters starting from just 50 µm, they can even access very small or difficult-to-reach cavities. They can be used to scan the holes of injection nozzles or the small gaps between the teeth of precision gear wheels. Standard probes with diameters of 0.8 and 1.3 mm are available for larger cavities.

Thanks to the modular design of the measuring system, the probe and evaluation unit can be placed at almost any distance from each other. High measuring frequencies, integrated interfaces and system-specific software solutions means they can be fully integrated into automated production processes. For inline measurements at production speed.

Your benefits

Measuring in the smallest of spaces (from Ø 0.1 mm)
Results with nanometer accuracy
Non-contact and wear-free
100-percent inspection capability
Almost material and surface-independent
Single-point and multi-point measurements possible
Generation of 2D profiles and 3D point clouds
Standards-compliant quality control according to DIN EN ISO
Easy-to-automate and fully integrable
Electromagnetic compatibility (EMC)

System characteristics

FDM-1

Highest accuracy

Measuring range	80 µm
Resolution (typical standard deviation)	< 3 nm*
Diameter of the measuring probe	≥ 50 µm

*Fixed point measurement at a working distance of 0.1 mm on polished glass.

FDM-2

Large measuring range

Measuring range	1 mm
Resolution (typical standard deviation)	< 10 nm*
Diameter of the measuring probe	≥ 50 µm

*Fixed point measurement at a working distance of 0.1 mm on polished glass.

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 20 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	230 V (AC)

Applications

FDM-1 und FDM-2 are particularly suited for applications in the precision and ultra-precision manufacturing sector. The miniaturized probes allow for flexible, contactless and highly precise inspections of difficult-to-access surface structures and cavities.

Characterization of surfaces

Detecting the roughness and waviness of technical surfaces
Monitoring and determining tool wear
Inspecting optics, wafers and optical flats
Measuring in scan mode for 2D/3D representation of free-form surfaces such as the flanks of gear wheels

High-accuracy distance measurement

Measuring expansion, drift, wear and vibrations on ultra-precision machines and machine tools
Highly accurate position detection for component alignment and tool position determination multi-point measurement possible

Testing form and position (GD&T)

e.g. roundness, flatness, straightness, parallelism, circular run-out

Measuring in tiny and hard-to-access spaces

e.g. micro-drilled holes, holes of injection nozzles, gaps between the teeth of precision gear wheels

Integration in precision coordinate measuring machines, automatic testing set-ups or UP-machines

Compatibility and automation thanks to serial interfaces
Single or multi-point measurements
Inline measurements at production speed
Industry 4.0 applications

We’ll be happy to develop customized solutions for your specific measurement task.

Request further information

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