Optical Diagnostics Research and Applications at MetroLaser

Presented at The University of California Irvine, March 24, 2006by

James D. Trolinger, Ph. DVice-president and Co-founder(949) 553-0688 http://www.metrolaserinc.com

History and Achievements• June 1988: Founded by Drs. Cecil Hess and Jim Trolinger.

• 1994: U. S. SBA Distinguished Award of Excellence.

• 1995: U. S. SBA National Prime Contractor of the Year.

• 2000: Spun off 4DVision Technologies Inc.

• 2004: AIAA Aerodynamics Measurement Technology Award

• 2006: Ongoing collaborations with 14 universities

• 2006: 30 employees, 15 Ph. D’s.

• Thirteen electro-optical laboratories in Irvine CA.

• Providing State of the Art Optical diagnostic instruments, services, & research to government and industry.

MetroLaser/UCI Collaborations

• MetroLaser has had joint contracts with UCI continuously for nearly 18 years.

• Over 30 different programs, subcontracts in excess of $2M.

• MetroLaser 4 fulltime employees and 10 interns from UCI.

• Currently have 3 active joint proposals

Summary

1. Laser Doppler Vibrometry

2. Aerodynamic and Aero optic Measurement Technology

3. Optical Sensors for NDT, monitoring, detection, and discrimination

4. Tracking and Ranging for Space Situation Awareness

Technologies for Vibration Analysis

• Electronic Digital Holography (PhaseCam)• Laser Doppler Vibrometry

– Single beam– Multiple beam– Matrix

• Applications– Non Destructive Testing– Modal analysis– Machinery health monitoring– Remote microphone– Land mine detection

MetroLaser Vibrometer

Typical Frequency Response of a Column

Reduction of Natural FrequencyWith Increasing Damage

Impact Testing of a Concrete Column in the Civil Engr. Lab at UC Irvine

Increasing damage

Automotive Experiments

Use VibroMet 500 to measure the engine vibration as a function of engine speed

Automotive Experiments

Variation of Peak Frequency and Velocity with Engine Speed

Landmine DetectionScanning or Multipoint

Laser vibrometer

Loudspeaker50-300 Hz

Land mine

Ground Surface

MetroLaser LDV Cart Array

Lane 13, VS2.2., Depth = 1”

Broadband Excitation, 80-300 Hz

Multibeam LDV

Correlation of LDV Defect Data WithUltrasound Image of a F-15 Vertical Stabilizer

MultiBeam Full Field Application

Dual Array Configuration

Custom Matrix Configuration

10” Blade - 4940 Hz

Electronic (Digital) HolographyElectronic (Digital) Holography

• Holographic data stored on CCD array.

• Digital wavefront reconstructionPhase shifting interferometry (hologram plane).Diffraction theory (propagate to image).

• Interferograms are computed.

• Amenable to fiber optical implementation.

Commercial MetroLaser wavefront sensor

Laser

Object BeamTransmitting Lens Receiving Lens

3D Plot of Turbine Blade Vibration Mode

Profilometry

Detail of US penny shows1 m profiling resolution

Discovering Lincoln in the CentDiscovering Lincoln in the Cent

Flow Visualization Holography

Analyzing flow fields for density, velocity,

temperature

Dynamic optical Pathlength Measurements in real time

Complete experiment

Wavefront Data-Baseline L/D=9

Schematic of aero-optic model. Aero-Optic Effects

Boundary layer turbulence & shock wave Window

Cooling

Stress induced widow aberrations

Aberrated Wavefront

Computer Model of System Model

Shock Turbulence Window

Model masks used to simulate

aero-optic effects Imaging system model Image

Plane

AOTS Simulated Aero-Optical Effects

Planar Doppler VelocimetrySystem for use in the AEDC 16 Foot

Transonic Wind Tunnel Facility

Laser Reference Frequency System

Proposed PDV installation in 16T

Fiber Optic Microsensors for High-Fiber Optic Microsensors for High-Response Gas Total Temperature Response Gas Total Temperature

MeasurementMeasurement

AF03-251 (AC10)

High response High response measurement of total temperaturemeasurement of total temperature distortion at up to 48 locations around turbine distortion at up to 48 locations around turbine inlet.inlet.

Minimum flow blockage Minimum flow blockage from sensor arrayfrom sensor array

Robust Robust against flow borne particulatesagainst flow borne particulates

Probe replacement Probe replacement with minimum down-timewith minimum down-time

Air Force RequirementsAir Force Requirements

8000 R/s

T= 300 R

Task 2:Task 2: Design of fiber optic Design of fiber optic microsensormicrosensor

125m

2m

metallic mirror 0.01m

fiber cladding / 125m

fiber core / 10m

FP etalon 1-2m ZnSe / Si/SiC

metallic mirror 0.1m

0

CharacteristicsCharacteristics

Intrinsic Intrinsic solid statesolid state FP FP sensorsensor

Environmentally isolated

high bandwidth response

minimum flow disruption

high density array deployment

ConstructionConstruction

detectors scannermetal surface

feature

specular reflection

scanner

scatteredlight

Light Scattering Fatigue Detection

N = 9796 N = 14096

Nf = 43736

Notched Fatigue Sample 13P = 720 N

Active Laser Tracking System Concept

3D state vector Velocity Maneuvering Vibration

Coherent Detection

Control and DataProcessing Platform

Beam directing & telescope platform

Propagation through

atmosphere

Target tracking, sensing & imaging

Visible & IRRadiation

Non-coherent Radiation

Laser

Laser driverand

controller

Seed

CPU: System control & Data processing

Coherent Radiation

CPU

P1

P2

NLM

M1

M2

Multifunctional detector-array provides information on:• Delay time distance• Doppler shift velocity V

• Spatial/angular coordinates

0.7O

Gain G2

Gain G1

Laser Tracking System (Operational Principles)

IR

Laser &

Visible

FPI design and assembly

Desired Imaging FPI specification

Tuning range: t > 5 nm Bandpass width: p < 0.01 nm or p/ <

10-5

Acceptance angle: p ~ 1 ~ 0.017 rad Working aperture: 1.0 inch Transmittance T0 40 – 50 % Background rejection > 20 dB

Central-wavelength: ~700 nm

TDLAS System Layout for H2O

InGaAs Detector

Fiber

2-into-1 Fiber combiner

Tunable Diode lasers Laser current

controllerComputer for signal processing

Beam launch

Waveform generator

flame

1 = 1343 nm 2 = 1392 nm

xy

z

~3 cm

Swirl Burner at UCI Combustion Lab

Computer dataacquisition systemDiode laser

controller

InGaAs Detectors

Collimatinglenses

Fiber splitter

Waveformgenerator

Model boiler

Z0 = 0.5 mm

Z1 = 115 mm

Chemiluminescence sensor

Results Comparison (T1)

FS = -70% 100% Load

1150.01170.01190.01210.01230.01250.01270.01290.01310.01330.01350.0

0.0 10.0 20.0 30.0 40.0 50.0 60.0

EA (%)

T1

run

avg

(K

)

4000.0

4500.0

5000.0

5500.0

6000.0

6500.0

CO

2* r

un

avg

T1run

CO2 run

TDLAS temperature and CO2 chemiluminescence:

EA = excess air: air beyond stoichiometric

EPA SBIR Opportunities-coming• Improving the Great Lakes• Control of Air Pollution• Monitoring and Remote Sensing• Green Buildings• Mining and Mine Waste Management• Lead Paint Detection and Removal• Agriculture and Rural Community Improvement• Management of Animal Feeding Operations• Drinking Water Treatment and Monitoring• Pollution Indicators for Beaches and Recreational Waters• Water and Wastewater Management• Innovation in Manufacturing for Environmental Protection• Nanotechnology• Engine and Vehicle • Emissions Reduction• Solid and Hazardous Waste• Homeland Security.  •  Website- www.epa.gov/ncer/sbir/

Homeland Security SBIR

• Opened10 March – 10 April, 2006 Full Proposals 10 April, 2006 Deadline for

• AEROSOL COLLECTION INTO LOW ANALYSIS VOLUMES (ACLAV) • RELIABLE PEROXIDE-BASED EXPLOSIVES DETECTION WITH LOW FALSE

ALARM RATE  • ENHANCED EXPLOSIVE SAMPLE COLLECTION AND/OR

PRECONCENTRATION SYSTEMS • SIGNAL PROCESSING FOR A SOUTHERN BORDER SURVEILLANCE

SYSTEM • HUMAN DETECTOR FOR CARGO SHIPPING CONTAINERS • INSTANTANEOUS REMOTE SENSING DATA RECEIVING AND PROCESSING

FOR EMERGENCY RESPONSE • NETWORK-BASED BOUNDARY CONTROLLERS • BOTNET DETECTION AND MITIGATION • MANAGING MULTI-MEDIA SURVEILLANCE INFORMATION NETWORKS

Thank you for your attention

You can download this presentation from our website:

www.metrolaserinc.com