quDIS

Interferometric Distance Measurement

quDIS Interferometric Distance Measurement - three channels in the 19" rack.
General distance and vibration measurement - the laser beam is adjusted by an sensor head and reflected by a mirror or retroreflector.
quDIS - vibration analysis of a violin at LASER World of PHOTONICS
Photo: P. Bachhuber - Medienstürmer
quDIS has an internal gas cell and a reference cavity. The graph shows the signals of detector 1 with different distances and the internal detector 3 with the linear wavelength sweep.

Overview
Sensor Heads
Accessoires
Specifications
Downloads

The quDIS is a confocal displacement sensor, by default based on a Fabry-Pérot interferometer, with highest signal stability of < 0,05 nm and a contrast independent measuring algorithm.

Next to relative and absolute distance measurement, vibration analysis is possible with a 25 kHz bandwidth in free space or glass rods & fibers as cavities.

Key Features

Confocal displacement sensor

Fiber interferometer

< 0.05 nm signal stability, no periodical artifacts

Absolute distance measurement

0.03 … 20 m working distance

25 kHz bandwidth

Contrast independent

3 sensor axes, multiple devices

Flexible fiber-based sensor heads

Applications

Slow drifts

Vibration analysis

Position and angles

Velocity and acceleration

Quality control

Fail-safe procedures

Beam interrupt compensation

Quality control

Gap and edge measurement in layered structures

Sensor Heads

All applications require different constrains for collimation, focusing and the beam profile, depending on their reflecting targets. The shaping of the laser beam is achieved by different sensor heads. All these sensor heads for quDIS are based on optical fibers, well-established in the telecommunication market.

Next to standard collimators and established focusing heads, qutools designs special heads for applications in harsh environments.

The design of a sensor head for measuring objects at high temperature drifts.

This collimator is manufactured of a nickel–iron alloy with low coefficient of thermal expansion.

Accessoires and Upgrades

Absolute Measurement

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

quCATCH

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

Ambient Measurement Unit (AMU)

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

Reflectors

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

Specifications

Specification	Value	Unit
Resolution	1	pm
Signal stability, relative distance *¹	< 0.05	nm
Accuracy relative measurement	200	nm/m
Signal stability, absolute distance *²	< 200	nm
Accuracy absolute measurement	2000	nm/m
Bandwidth relative / absolute	25	kHz
Working distance *³	0.03 ... 20	m
Target speed	1	m/s
Laser power (class 1)	< 400	µW
Wavelength	1 535	nm
Fiber input connectors	FC Narrow-Key-Slot Mating Sleeves
Axes	3
Upgradeable	Absolute distance measurement
Interface	USB 3.0, Ethernet
Software	GUI, DLL, LabView, Python, Command line
Dimensions	440 x 300 x 50	mm x mm x mm
Power consumption	< 50	W at 100 to 230 VAC

*1: relative distance RMS@ 100Hz, 2s, 130mm
*2: absolute distance RMS@ 100 Hz 130 mm
*3: sensor head dependent

Downloads

quDIS brochure	06/2020	3.5 MB	pdf
quDIS datasheet	07/2019	0.2 MB	pdf
quDIS whitepaper	06/2020	0.9 MB	pdf

Software

quDIS software V1.1.3	03/2020	13.2 MB	exe
quDIS 64bit library win V1.1.3	03/2020	0.2 MB	zip
quDIS 64bit Linux V1.1.3	03/2020	2.0 MB	tgz