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Interferometric Distance Measurement
on the Nanometer Scale.

  • quDIS Interferometric Distance Measurement - three channels in the 19" rack.

  • Overview
  • Applications
  • Specifications
  • Accessoires
  • Downloads

Key Features

Interferometric distance measurement
< 0.05 nm signal stability
Absolute distance measurement
0.1 … 20 m working distance
25 MHz bandwidth
1 m/s target speed
3 sensor axes, multiple devices


The broad spectrum of optical technology and the fields of application of the interferometer are as ambivalent as its purposes in industry and research.

Specific applications


Signal stability *1< 0.05nm
Signal stability, absolute distance *2< 200nm
Bandwidth relative / absolute *325kHz
Working distance *40.1 ... 20m
Target speed1m/s
Laser power (class 1)< 400µW
Wavelength1 535nm
Fiber input connectorsFC Narrow-Key-Slot Mating Sleeves
Synchronizationmultiple devices
UpgradeableAbsolute distance measurement
InterfaceUSB 3.0, Ethernet
SoftwareGUI, DLL, LabView, Python, Command line
Dimensions440 x 300 x 50mm x mm x mm
Power consumption< 50
at 100 to 230 VAC

*1: relative distance RMS@ 100Hz, 2s, 200mm
*2: absolute distance RMS@ 100Hz, 200mm
*3: @ 1000mm, distance dependend
*4: sensor head dependend

Accessoires and Upgrades

Sensor Heads

Different applications require different constrains for collimation, focussing and beam profile or UHV and low temperatures.

Absolute Measurement

Determination of absolute distances within the wavelength range.
Compensation of huge height differences or beam interruptions.


Tracking unit with spherical reflectors for 3D coordinate measurement systems.
Automated tracking or object/prototype examination.

Ambient Measurement Unit (AMU)

Analysis of environmental parameters like temperature and pressure.
Failure correction, Measurement of refractive index.


Fibre coupling unit for fast and automatic laser coupling.
Quick calibration measurement even at separated locations.


Different reflector solutions: Retroreflectors, plane or parabolic mirrors.
Temperature caused deformation and signal stabilisation.


quDIS brochure 01/2019 3.4 MB pdf
quDIS datasheet 07/2019 0.2 MB pdf