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Due to Bossa Nova Technologies continuous product improvement policy, specifications are subject to change without notice.©2010 Bossa Nova Technologies, LLC. All rights reserved

QUARTET Industrial Laser Ultrasonic Receiver

• High sensitivity displacement measurements on any surface, any material and any condition (moving/high temperature sample)

• Ultrasonic measurements up to 20 MHz bandwidth

QUARTET Laser Ultrasonic receiver

TECHNICAL SPECIFICATIONS

By adding a scanner, QUARTET allows a full

field analysis of ultrasonic signals by providing a

3D mapping of the surface with a 1 ns time

resolution. Turn-key systems (QUARTET +

SCANNER + OSCILLOSCOPE + COMPUTER +

SOFTWARE) are available.

QUARTET ACCESSORIES

Adding a 2” light collection to

the fiber head provides extra

sensitivity to the flexibility

provided by the fiber head.

Bossa Nova Technologies 11922 Jefferson Blvd CULVER CITY - CA 90230 USA

Tel: (310) 577-8113 Fax: (310) 943-3280

info@bossanovatech.com www.bossanovatech.com

• High frequency, sub-nanometer vibrometry

• Non-destructive testing in industrial environment

• Non-contact ultrasonic inspection

• Piezo-transducer characterization

NESD (Noise Equivalent Surface Displacement)

1. 10-5 nm/Hz1/2

Detection Bandwidth Upper limit Up to 50 MHz

Detection Bandwidth Lower limit 100 kHz or 1 MHz

Fiber Multimode - 50 micron diameter

Length to be specified when ordering

Spot diameter on sample 60 micron to 500 micron (f=50mm to 500 mm)

Optical stand-off From 50 mm to 500 mm

Diameter of collecting aperture 1" (25mm) to 2" (50mm)

Depth of focus from 0.3 mm to 50 mm

Analog OUTPUTS AC signal (Full bandwidth)

Calibration Level

Suitable laser power 500mW, 1W or 1.5 W (internal) - Up to 15 W external

Electrical requirement 110/220 V, 50/60 Hz

Dimensions / Weight 381mm x 381mm x 152mm - 15 kg

OPTIONS 2D scanning set-up including PC, software,

digitalization card and X-Y translations

T E C H N I C A L B A C K G R O U N D Bossa Nova Technologies introduces its Laser receiver QUARTET for non-destructive testing applications in factory conditions. Based on multi-channel random quadrature detection

technology, QUARTET is designed for remote detection of sub-nanometer displacements. No path stabilization is required. The stability of the interferometer is based on the multi-channel, parallel demodulation that is done electronically. Associated with a compact and light fiber head to deliver the probe beam on the sample and collect

the backscattered light, QUARTET is the perfect ultrasonic receiver for fast and reliable scan.

Each homodyne signal is processed in parallel using a patented signal processing

architecture, based on "random quadrature" demodulation scheme (taking advantage of the

random phase distribution inherent to speckle light). The detectors produce a time-varying

analog voltage that is proportional to the rectified instantaneous surface displacement at

ultrasonic frequencies.

• Simple Design No optical path control, stabilization or compensation.

• Fiber system Small and compact fiber head dedicated for fast and reliable scan.

• High sensitivity & low laser power More detectors collect more light, sensitivity increases, required laser power decreases.

• Any surface/material Light collection efficiency combined with a speckle processing technique allows the inspection of any kind of surface (rough, porous, rusted or mirror-like) or material (composite, steel or paper).

• Robust, Stable & Compact Not subject to stability issues common to long cavity and path-stabilized interferometers because it does not require control of the optical path length. Does not use high accuracy optical components or positioning, which makes it exceptionally rugged.

• Low-cost Simple design and low laser power decreases the cost of the receiver, the cost of the inspection system and the overall maintenance cost.

• CW/Pulsed operation The output beam can be intensity-modulated in order to reduce the average optical power when a fragile sample is measured, without degrading the performance of the receiver.

• 2D scanning 2D scanning is very easy with QUARTET. Thanks to the multi-speckle interferometry, no more signal fading due to the collection of a dark speckle.

Multi-detector

Spe

ckle

pro

cess

ing

Signal out

Signal beam

Probe beam

Sample Optical path difference

Reference beam

©2013 Bossa Nova Technologies, LLC. All rights reserved

Q U A R T E T F E A T U R E S

QUARTET combines the advantages of homodyne interferometry and multidetector ability.

The beam reflected by the sample rough surface has many speckle. The multi-speckled beam

(signal beam) is combined with the reference beam (Local oscillator) using a beam combiner.

Each detector collects few speckle and delivers an homodyne signal.

INSPECTION OF CARBON FIBER COMPOSITE

B-scan

C-scan

Time signal

Echo 1

Echo 2

Echo 3

Coupled with a 2D scanner, QUARTET maps composite thickness variations as well as internal and external defects as shown on the following B-scan and C-scan.

Thickness 1

Thickness 2

External defect

SCAN

Defects observed with

QUARTET

CARBON FIBER COMPOSITE

2 different thicknesses Internal defect (square) External defect (round)

QUARTET is the ideal receiver for Laser Ultrasonic inspection in factory conditions. It provides high sensitivity on moving or static objects and can be used with low power laser.

• Non-contact measurement

• Sensitive on any surface/material type

• Insensitive to external vibrations

• Compact & robust design

Thanks to QUARTET, Laser Ultrasonic inspection systems will provide satisfaction in performance, reliability and cost to manufacturers in the steel, paper, glass, automotive and aerospace industries.

COMPACT AND COST-EFFECTIVE

Industrial Solution

QUARTET Laser Ultrasonic receiver