Fiber-optic sensors

Flexible precision

The FDM Series fiber-optic distance measuring systems 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 tiny 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 device, 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.

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Your benefits

Measuring in the smalles 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
Accuracy (typical standard deviation)	< 3 nm*
Diameter of the measuring probe	≥ 50 µm

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

FDM-2

Large measuring range

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

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

General Parameters

Fiber-optic distance measuring system FDM-1 by fionec

Fiber-optic distance measuring system FDM-1 rear view featuring interfaces

Fiber-optic distance measuring system FDM-2 front view

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

The FDM sensor is 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